Running safety assessment and tracking irregularity parametric sensitivity analysis of high-speed maglev train-bridge system are of great concern,especially need perfect refinement models in which all properties can b...Running safety assessment and tracking irregularity parametric sensitivity analysis of high-speed maglev train-bridge system are of great concern,especially need perfect refinement models in which all properties can be well characterized based on various stochastic excitations.A three-dimensional refined spatial random vibration analysis model of high-speed maglev train-bridge coupled system is established in this paper,in which multi-source uncertainty excitation can be considered simultaneously,and the probability density evolution method(PDEM)is adopted to reveal the system-specific uncertainty dynamic characteristic.The motion equation of the maglev vehicle model is composed of multi-rigid bodies with a total 210-degrees of freedom for each vehicle,and a refined electromagnetic force-air gap model is used to account for the interaction and coupling effect between the moving train and track beam bridges,which are directly established by using finite element method.The model is proven to be applicable by comparing with Monte Carlo simulation.By applying the proposed stochastic framework to the high maglev line,the random dynamic responses of maglev vehicles running on the bridges are studied for running safety and stability assessment.Moreover,the effects of track irregularity wavelength range under different amplitude and running speeds on the coupled system are investigated.The results show that the augmentation of train speed will move backward the sensitive wavelength interval,and track irregularity amplitude influences the response remarkably in the sensitive interval.展开更多
In view of the need for geomechanical safety analysis of repositories in salt rock, failure criteria,creep rupture criteria,material models,pillar design methods and criteria for the assessment of barrier efficiency a...In view of the need for geomechanical safety analysis of repositories in salt rock, failure criteria,creep rupture criteria,material models,pillar design methods and criteria for the assessment of barrier efficiency as well as investigations of the interaction between hydraulics and mechanics for the case of uncontrolled flooded repositories are necessary. The introduction of damage mechanics and of the Hou/Lux material model including damages into geomechanical safety analysis of repositories in salt rock can reduce some previous deficits in knowledge and modelling. This article will be as a part of geotechnical assessment to introduce the Hou/Lux material model,a new concept of hydro-mechanical coupling and a pillar design method as well as criteria for the assessment of efficiency of geological barriers.展开更多
Objective： To analyze hot research areas and the present research status of nursing safety management in PubMed. Methods： PubMed was searched using ＂safety management＂ for the literature on nursing safety manageme...Objective： To analyze hot research areas and the present research status of nursing safety management in PubMed. Methods： PubMed was searched using ＂safety management＂ for the literature on nursing safety management. BICOMB 2.0 and SPSS 20.0 software were used to analyze high-frequency keywords and conduct co-word clustering analysis. Results： We searched for totally 2353 articles related to our topic and extracted 19 high-frequency keywords （27.50%）. Five research focuses were concluded, including： study on nursing safety culture; team work to promote nursing safety; practice of nursing safety management; workplace violence against nursing staffs; nursing safety and quality evaluation standard. Conclusion： Analysis of the hotspots of nursing safety management in the past 10 years will contribute to understanding the research emphases and trend of development, and provide reference for the study and practice of nursing safety management.展开更多
Within this paper, the process of statistical safety analysis has been presented, which involves the following steps： formulation of basic principles of statistical safety analysis, initial events analysis, accident ...Within this paper, the process of statistical safety analysis has been presented, which involves the following steps： formulation of basic principles of statistical safety analysis, initial events analysis, accident sceneries progress analysis, risk calculation, and risk calculation results analysis. On this basis, it has been concluded that the bucket wheel excavator SRs 1200×24/4×0（400 kW）＋VR safety criteria is the mechanism for the hoist of rotor＇s arrow failure modes, because in that case whole bucket wheel excavator failure would necessarily happen （excavator falling down on counterweight）. Therefore, excavator units statistical safety analysis is accomplished preventively to obtain its effective maintenance management.展开更多
The battery management system(BMS)is the main safeguard of a battery system for electric propulsion and machine electrifcation.It is tasked to ensure reliable and safe operation of battery cells connected to provide h...The battery management system(BMS)is the main safeguard of a battery system for electric propulsion and machine electrifcation.It is tasked to ensure reliable and safe operation of battery cells connected to provide high currents at high voltage levels.In addition to efectively monitoring all the electrical parameters of a battery pack system,such as the voltage,current,and temperature,the BMS is also used to improve the battery performance with proper safety measures within the system.With growing acceptance of lithium-ion batteries,major industry sectors such as the automotive,renewable energy,manufacturing,construction,and even some in the mining industry have brought forward the mass transition from fossil fuel dependency to electric powered machinery and redefned the world of energy storage.Hence,the functional safety considerations,which are those relating to automatic protection,in battery management for battery pack technologies are particularly important to ensure that the overall electrical system,regardless of whether it is for electric transportation or stationary energy storage,is in accordance with high standards of safety,reliability,and quality.If the system or product fails to meet functional and other safety requirements on account of faulty design or a sequence of failure events,then the environment,people,and property could be endangered.This paper analyzed the details of BMS for electric transportation and large-scale energy storage systems,particularly in areas concerned with hazardous environment.The analysis covers the aspect of functional safety that applies to BMS and is in accordance with the relevant industrial standards.A comprehensive evaluation of the components,architecture,risk reduction techniques,and failure mode analysis applicable to BMS operation was also presented.The article further provided recommendations on safety design and performance optimization in relation to the overall BMS integration.展开更多
The implementation of Integrated Management System （IMS） of the quality management and safety is aiming to provide production of biscuit products corresponding to particular specification and client＇s requirements....The implementation of Integrated Management System （IMS） of the quality management and safety is aiming to provide production of biscuit products corresponding to particular specification and client＇s requirements. This paper explores the possibilities of achieving stable sensory and microbiological parameters of the biscuits, through the implementation of IMS. An analysis was carried out of the factors affecting the achievement of stable quality. The achievement of the stability of the parameters of 150 different lots of biscuits has been measured before, during and after the implementation of IMS in the manufacturing company The performed water activity analysis and sensory analysis confirmed that despite the dynamic changes in the internal and external environments as well as the significant changes in the requirements of the standards and the legislation, the implemented IMS has allowed the maintenance of the stable quality and safety of the biscuit products.展开更多
As the basis of industrial design, machinery manufacturing enterprises have a very wide coverage. As an important industry of the national economy, manufacturing has a great influence on people's daily life. Becau...As the basis of industrial design, machinery manufacturing enterprises have a very wide coverage. As an important industry of the national economy, manufacturing has a great influence on people's daily life. Because it is difficult to produce products in manufacturing industry, and the distinctiveness and similarity of products are relatively low, the safety management and maintenance of process equipment is of great significance to the stability of processing equipment. Therefore, it is necessary to ensure proper management, maintain safety and ensure the normal operation of mechanical equipment. This paper analyzes the problems existing in the safety production management of machinery manufacturing enterprises in detail, and puts forward some specific solutions to these problems.展开更多
With the development of the construction industry in recent years, the issue of building safety is increasingly concerned. For construction enterprises, construction safety problems not only affect the smooth progress...With the development of the construction industry in recent years, the issue of building safety is increasingly concerned. For construction enterprises, construction safety problems not only affect the smooth progress of construction, but also affect the normal operation and healthy development of enterprises. Therefore, it is necessary to strengthen safety management and implement relevant countermeasures during construction. However, in order to effectively solve the safety problems, the construction unit in the construction quality management must pay more attention to safety management, according to the actual situation of the construction of all aspects of the construction risk in-depth study and analysis, and develop preventive measures and management procedures for reference.展开更多
The continuous development of the socialist economy has widened the new opening for the progress of the medical and health industry. The improvement of the medical and health service level has brought important guaran...The continuous development of the socialist economy has widened the new opening for the progress of the medical and health industry. The improvement of the medical and health service level has brought important guarantee for peoples production and life. In recent years, people have paid extensive attention to the safe and reasonable use of clinical drugs. In particular, the safety of clinical medication is directly related to peoples life safety and health. According to the professional statistics of WHO, the percentage of patients dying due to irrational drug use is as high as about 40% in the world, which shocked many people. Therefore, in the actual work of medical and health medication, more attention should be paid to standardizing medication, rational medication and safe medication. The pharmacy department should establish and perfect the standard system of clinical medication. On the one hand, it is to ensure the standardization and safety of clinical medication, on the other hand, it is also to eliminate the adverse consequences and effects caused by non-standard medication. This paper analyzes and discusses the progress in safety management and analysis of standardized clinical medication in pharmacy department, hoping to provide some suggestions and inspiration for relevant workers.展开更多
Open-pit mine blasting has a strong technical and dangerous and any improper control of the link will affect the blasting effect, and even cause serious safety problems, causing difficult to estimate the loss. Under t...Open-pit mine blasting has a strong technical and dangerous and any improper control of the link will affect the blasting effect, and even cause serious safety problems, causing difficult to estimate the loss. Under the background of the rapid development of science and technology, many high and new technology is widely used to the open pit mine blasting, although improve the efficiency of the open pit mine blasting. At the same time to the blasting technology, blasting personnel, blasting process put forward higher requirements. Once the design is unreasonable and in violation of operation regulations, it is very prone to safety accidents, threatening the life safety of field personnel. Based on this, it is particularly necessary to carry out open-air blasting accident analysis and safety management research.展开更多
With the increasing attention paid to battery technology,the microscopic reaction mechanism and macroscopic heat transfer process of lithium-ion batteries have been further studied and understood from both academic an...With the increasing attention paid to battery technology,the microscopic reaction mechanism and macroscopic heat transfer process of lithium-ion batteries have been further studied and understood from both academic and industrial perspectives.Temperature,as one of the key parameters in the physical fra mework of batteries,affects the performa nce of the multi-physical fields within the battery,a nd its effective control is crucial.Since the heat generation in the battery is determined by the real-time operating conditions,the battery temperature is essentially controlled by the real-time heat dissipation conditions provided by the battery thermal management system.Conventional battery thermal management systems have basic temperature control capabilities for most conventional application scenarios.However,with the current development of la rge-scale,integrated,and intelligent battery technology,the adva ncement of battery thermal management technology will pay more attention to the effective control of battery temperature under sophisticated situations,such as high power and widely varied operating conditions.In this context,this paper presents the latest advances and representative research related to battery thermal management system.Firstly,starting from battery thermal profile,the mechanism of battery heat generation is discussed in detail.Secondly,the static characteristics of the traditional battery thermal management system are summarized.Then,considering the dynamic requirements of battery heat dissipation under complex operating conditions,the concept of adaptive battery thermal management system is proposed based on specific research cases.Finally,the main challenges for battery thermal management system in practice are identified,and potential future developments to overcome these challenges are presented and discussed.展开更多
Key methods developed and used in the USSR and in the Russian Federation to determine the impact and friction sensitivity of energetic materials and explosives have been discussed.Experimental methodologies and instru...Key methods developed and used in the USSR and in the Russian Federation to determine the impact and friction sensitivity of energetic materials and explosives have been discussed.Experimental methodologies and instruments that underlie the assessment of their production and handling safety have been described.Studies of a large number of compounds have revealed relationships between their sensitivity parameters and structure of individual compounds and compositions.The range of change of physical and chemical characteristics for the compounds we examined covers the entire region of their existence.Theoretical methodology and equations have been formulated to estimate the impact and friction sensitivity parameters of energetic materials and to evaluate the technological safety in use.The developed methodology is characterized by high-accuracy calculations and prediction of sensitivity parameters.展开更多
Establishing a sound safety construction management system is the first issue of safety construction management of construction projects. Safety management system can greatly promote the standardization of constructio...Establishing a sound safety construction management system is the first issue of safety construction management of construction projects. Safety management system can greatly promote the standardization of construction projects. Management mainly includes strengthening the executive safety education, enhance the safety awareness of execution, management and the implementation of personal safety, standardize security protection, strict implementation of safety assessment system, strengthen the attention not only to get everything ready before execution, and rectify and solve all illegal behavior, the enforcement of the inhibition of hidden dangers. This paper mainly based on the current situation of China's building safety management, carried out a more in-depth analysis.展开更多
With the rapid development of China's economy, science and technology are also constantly innovating and developing, and they are widely used in various industries.Especially in the background of the modern electr...With the rapid development of China's economy, science and technology are also constantly innovating and developing, and they are widely used in various industries.Especially in the background of the modern electronic information era, all walks of life are using electronic information technology, especially hospitals have gradually replaced the traditional archives management mode into electronic archives management, which tend to be information and systematic management.However, in terms of the current hospital electronic file management work, there are still some deficiencies, and the management work needs to be improved. Moreover, there are hidden security risks in the electronic information files under the network environment, so the security problems also need to be solved urgently.This paper analyzes the safety situation of hospital electronic archives based on 5W theory, and expounds the advantages, importance and existing problems of electronic archives management, so as to help the safety management of hospital electronic archives in the future.展开更多
Generally speaking, the geological topography of coal mine project is complex, which makes coal mining face many safety risks. When coal mining does not pay attention to safety management, it may lead to serious accid...Generally speaking, the geological topography of coal mine project is complex, which makes coal mining face many safety risks. When coal mining does not pay attention to safety management, it may lead to serious accidents and damage the economic and social benefits of enterprises. Safety management helps to prevent and eliminate safety risks in coal projects, reduce accidents and ensure the healthy development of coal enterprises to a certain extent. From the current situation of China's coal project safety management, there are many problems in the future to achieve the transformation and development of the coal industry, and it is necessary to improve the level of safety management.展开更多
The safety instrument system in oil and gas pipeline application form and application methods shall conform to the basic requirement of the state of different oil and gas transportation, at the same time, under the in...The safety instrument system in oil and gas pipeline application form and application methods shall conform to the basic requirement of the state of different oil and gas transportation, at the same time, under the influence of such requirements, related management department should be combined with the operation of the safety instrument system management mechanism, to adjust the running timeliness of such a system, so as to improve the operation of the instrument system response efficiency. In the process of modern safety instrument system operation, some information means can be applied to safety instrument system, so as to improve the actual efficiency of system operation management. More importantly, an effective information feedback loop can be formed to improve the overall quality of the operation and application of the safety instrumentation system. Based on this, this paper first analyzes the application problems of safety instrument system in oil and gas pipeline, and then discusses the methods and suggestions related to system application on the basis of solving such problems.展开更多
This paper describes a precise method combining numerical analysis and limit equilibrium theory to determine potential slip surfaces in soil slopes. In this method, the direction of the critical slip surface at any po...This paper describes a precise method combining numerical analysis and limit equilibrium theory to determine potential slip surfaces in soil slopes. In this method, the direction of the critical slip surface at any point in a slope is determined using the Coulomb’s strength principle and the extremum principle based on the ratio of the shear strength to the shear stress at that point. The ratio, which is considered as an analysis index, can be computed once the stress field of the soil slope is obtained. The critical slip direction at any point in the slope must be the tangential direction of a potential slip surface passing through the point. Therefore, starting from a point on the top of the slope surface or on the horizontal segment outside the slope toe, the increment with a small distance into the slope is used to choose another point and the corresponding slip direction at the point is computed. Connecting all the points used in the computation forms a potential slip surface exiting at the starting point. Then the factor of safety for any potential slip surface can be computed using limit equilibrium method like Spencer method. After factors of safety for all the potential slip surfaces are obtained, the minimum one is the factor of safety for the slope and the corresponding potential slip surface is the critical slip surface of the slope. The proposed method does not need to pre-assume the shape of potential slip surfaces. Thus it is suitable for any shape of slip surfaces. Moreover the method is very simple to be applied. Examples are presented in this paper to illustrate the feasibility of the proposed method programmed in ANSYS software by macro commands.展开更多
Unlike the limit equilibrium method(LEM), with which only the global safety factor of the landslide can be calculated, a local safety factor(LSF) method is proposed to evaluate the stability of different sections of a...Unlike the limit equilibrium method(LEM), with which only the global safety factor of the landslide can be calculated, a local safety factor(LSF) method is proposed to evaluate the stability of different sections of a landslide in this paper. Based on three-dimensional(3D) numerical simulation results, the local safety factor is defined as the ratio of the shear strength of the soil at an element on the slip zone to the shear stress parallel to the sliding direction at that element. The global safety factor of the landslide is defined as the weighted average of all local safety factors based on the area of the slip surface. Some example analyses show that the results computed by the LSF method agree well with those calculated by the General Limit Equilibrium(GLE) method in two-dimensional(2D) models and the distribution of the LSF in the 3D slip zone is consistent with that indicated by the observed deformation pattern of an actual landslide in China.展开更多
The daily operations in the mining industry are still a significant source of risk with regard to occupational safety and health(OS & H). Various research studies and statistical data world-wide show that the numb...The daily operations in the mining industry are still a significant source of risk with regard to occupational safety and health(OS & H). Various research studies and statistical data world-wide show that the number of serious injuries and fatalities still remains high despite substantial efforts the industry has put in recent years in decreasing those numbers. This paper argues that the next level of safety performance will have to consider a transition from coping solely with workplace dangers, to a more systemic model taking organizational risks in consideration. In this aspect, lessons learned from the nuclear industry may be useful, as organizational learning processes are believed to be more universal than the technologies in which they are used. With the notable exception of major accidents, organizational performance has not received all the attention it deserves. A key element for reaching the next level of performance is to include organizational factors in low level events analyses, and approach the management as a risk control system. These factors will then appear not only in the event analysis,but in supervision activities, audits, change management and the like. Many recent event analyses across various industries have shown that organizational factors play a key role in creating conditions for triggering major accidents(aviation, railway transportation, nuclear industry, oil exploitation, mining, etc.).In this paper, a perspective that may be used in supervisory activities, self-assessments and minor events investigations, is presented. When ingrained in an organizational culture, such perspective has the highest potential for continuous safety improvement.展开更多
The construction of waste rock dumps on existing tailing ponds has been put into practice in China to save precious land resources. This work focuses on the safety assessment of the Daheishan molybdenum mine waste roc...The construction of waste rock dumps on existing tailing ponds has been put into practice in China to save precious land resources. This work focuses on the safety assessment of the Daheishan molybdenum mine waste rock dump under construction on two adjoining tailings ponds. The consolidation of the tailings foundation and the filling quality of the waste rock are investigated by the transient electromagnetic method through detecting water-rich areas and loose packing areas, from which, the depth of phreatic line is also estimated. With such information and the material parameters, the numerical method based on shear strength reduction is applied to analyzing the overall stability of the waste rock dump and the tailings ponds over a number of typical cross sections under both current and designed conditions, where the complex geological profiles exposed by site investigation are considered. Through numerical experiments, the influence of soft lenses in the tailings and possible loose packing areas in the waste rock is examined. Although large displacements may develop due to the soft tailings foundation, the results show that the waste rock dump satisfies the safety requirements under both present and designed conditions.展开更多
基金Project(2023YFB4302500)supported by the National Key R&D Program of ChinaProject(52078485)supported by the National Natural Science Foundation of ChinaProjects(2021-Major-16,2021-Special-08)supported by the Science and Technology Research and Development Program Project of China Railway Group Limited。
文摘Running safety assessment and tracking irregularity parametric sensitivity analysis of high-speed maglev train-bridge system are of great concern,especially need perfect refinement models in which all properties can be well characterized based on various stochastic excitations.A three-dimensional refined spatial random vibration analysis model of high-speed maglev train-bridge coupled system is established in this paper,in which multi-source uncertainty excitation can be considered simultaneously,and the probability density evolution method(PDEM)is adopted to reveal the system-specific uncertainty dynamic characteristic.The motion equation of the maglev vehicle model is composed of multi-rigid bodies with a total 210-degrees of freedom for each vehicle,and a refined electromagnetic force-air gap model is used to account for the interaction and coupling effect between the moving train and track beam bridges,which are directly established by using finite element method.The model is proven to be applicable by comparing with Monte Carlo simulation.By applying the proposed stochastic framework to the high maglev line,the random dynamic responses of maglev vehicles running on the bridges are studied for running safety and stability assessment.Moreover,the effects of track irregularity wavelength range under different amplitude and running speeds on the coupled system are investigated.The results show that the augmentation of train speed will move backward the sensitive wavelength interval,and track irregularity amplitude influences the response remarkably in the sensitive interval.
文摘In view of the need for geomechanical safety analysis of repositories in salt rock, failure criteria,creep rupture criteria,material models,pillar design methods and criteria for the assessment of barrier efficiency as well as investigations of the interaction between hydraulics and mechanics for the case of uncontrolled flooded repositories are necessary. The introduction of damage mechanics and of the Hou/Lux material model including damages into geomechanical safety analysis of repositories in salt rock can reduce some previous deficits in knowledge and modelling. This article will be as a part of geotechnical assessment to introduce the Hou/Lux material model,a new concept of hydro-mechanical coupling and a pillar design method as well as criteria for the assessment of efficiency of geological barriers.
文摘Objective： To analyze hot research areas and the present research status of nursing safety management in PubMed. Methods： PubMed was searched using ＂safety management＂ for the literature on nursing safety management. BICOMB 2.0 and SPSS 20.0 software were used to analyze high-frequency keywords and conduct co-word clustering analysis. Results： We searched for totally 2353 articles related to our topic and extracted 19 high-frequency keywords （27.50%）. Five research focuses were concluded, including： study on nursing safety culture; team work to promote nursing safety; practice of nursing safety management; workplace violence against nursing staffs; nursing safety and quality evaluation standard. Conclusion： Analysis of the hotspots of nursing safety management in the past 10 years will contribute to understanding the research emphases and trend of development, and provide reference for the study and practice of nursing safety management.
文摘Within this paper, the process of statistical safety analysis has been presented, which involves the following steps： formulation of basic principles of statistical safety analysis, initial events analysis, accident sceneries progress analysis, risk calculation, and risk calculation results analysis. On this basis, it has been concluded that the bucket wheel excavator SRs 1200×24/4×0（400 kW）＋VR safety criteria is the mechanism for the hoist of rotor＇s arrow failure modes, because in that case whole bucket wheel excavator failure would necessarily happen （excavator falling down on counterweight）. Therefore, excavator units statistical safety analysis is accomplished preventively to obtain its effective maintenance management.
基金supported by Azure Mining Technology,CCTEG,and the University of Wollongong.
文摘The battery management system(BMS)is the main safeguard of a battery system for electric propulsion and machine electrifcation.It is tasked to ensure reliable and safe operation of battery cells connected to provide high currents at high voltage levels.In addition to efectively monitoring all the electrical parameters of a battery pack system,such as the voltage,current,and temperature,the BMS is also used to improve the battery performance with proper safety measures within the system.With growing acceptance of lithium-ion batteries,major industry sectors such as the automotive,renewable energy,manufacturing,construction,and even some in the mining industry have brought forward the mass transition from fossil fuel dependency to electric powered machinery and redefned the world of energy storage.Hence,the functional safety considerations,which are those relating to automatic protection,in battery management for battery pack technologies are particularly important to ensure that the overall electrical system,regardless of whether it is for electric transportation or stationary energy storage,is in accordance with high standards of safety,reliability,and quality.If the system or product fails to meet functional and other safety requirements on account of faulty design or a sequence of failure events,then the environment,people,and property could be endangered.This paper analyzed the details of BMS for electric transportation and large-scale energy storage systems,particularly in areas concerned with hazardous environment.The analysis covers the aspect of functional safety that applies to BMS and is in accordance with the relevant industrial standards.A comprehensive evaluation of the components,architecture,risk reduction techniques,and failure mode analysis applicable to BMS operation was also presented.The article further provided recommendations on safety design and performance optimization in relation to the overall BMS integration.
文摘The implementation of Integrated Management System （IMS） of the quality management and safety is aiming to provide production of biscuit products corresponding to particular specification and client＇s requirements. This paper explores the possibilities of achieving stable sensory and microbiological parameters of the biscuits, through the implementation of IMS. An analysis was carried out of the factors affecting the achievement of stable quality. The achievement of the stability of the parameters of 150 different lots of biscuits has been measured before, during and after the implementation of IMS in the manufacturing company The performed water activity analysis and sensory analysis confirmed that despite the dynamic changes in the internal and external environments as well as the significant changes in the requirements of the standards and the legislation, the implemented IMS has allowed the maintenance of the stable quality and safety of the biscuit products.
文摘As the basis of industrial design, machinery manufacturing enterprises have a very wide coverage. As an important industry of the national economy, manufacturing has a great influence on people's daily life. Because it is difficult to produce products in manufacturing industry, and the distinctiveness and similarity of products are relatively low, the safety management and maintenance of process equipment is of great significance to the stability of processing equipment. Therefore, it is necessary to ensure proper management, maintain safety and ensure the normal operation of mechanical equipment. This paper analyzes the problems existing in the safety production management of machinery manufacturing enterprises in detail, and puts forward some specific solutions to these problems.
文摘With the development of the construction industry in recent years, the issue of building safety is increasingly concerned. For construction enterprises, construction safety problems not only affect the smooth progress of construction, but also affect the normal operation and healthy development of enterprises. Therefore, it is necessary to strengthen safety management and implement relevant countermeasures during construction. However, in order to effectively solve the safety problems, the construction unit in the construction quality management must pay more attention to safety management, according to the actual situation of the construction of all aspects of the construction risk in-depth study and analysis, and develop preventive measures and management procedures for reference.
文摘The continuous development of the socialist economy has widened the new opening for the progress of the medical and health industry. The improvement of the medical and health service level has brought important guarantee for peoples production and life. In recent years, people have paid extensive attention to the safe and reasonable use of clinical drugs. In particular, the safety of clinical medication is directly related to peoples life safety and health. According to the professional statistics of WHO, the percentage of patients dying due to irrational drug use is as high as about 40% in the world, which shocked many people. Therefore, in the actual work of medical and health medication, more attention should be paid to standardizing medication, rational medication and safe medication. The pharmacy department should establish and perfect the standard system of clinical medication. On the one hand, it is to ensure the standardization and safety of clinical medication, on the other hand, it is also to eliminate the adverse consequences and effects caused by non-standard medication. This paper analyzes and discusses the progress in safety management and analysis of standardized clinical medication in pharmacy department, hoping to provide some suggestions and inspiration for relevant workers.
文摘Open-pit mine blasting has a strong technical and dangerous and any improper control of the link will affect the blasting effect, and even cause serious safety problems, causing difficult to estimate the loss. Under the background of the rapid development of science and technology, many high and new technology is widely used to the open pit mine blasting, although improve the efficiency of the open pit mine blasting. At the same time to the blasting technology, blasting personnel, blasting process put forward higher requirements. Once the design is unreasonable and in violation of operation regulations, it is very prone to safety accidents, threatening the life safety of field personnel. Based on this, it is particularly necessary to carry out open-air blasting accident analysis and safety management research.
基金supported by the National Natural Science Foundation of China (No.62373224,62333013,and U23A20327)。
文摘With the increasing attention paid to battery technology,the microscopic reaction mechanism and macroscopic heat transfer process of lithium-ion batteries have been further studied and understood from both academic and industrial perspectives.Temperature,as one of the key parameters in the physical fra mework of batteries,affects the performa nce of the multi-physical fields within the battery,a nd its effective control is crucial.Since the heat generation in the battery is determined by the real-time operating conditions,the battery temperature is essentially controlled by the real-time heat dissipation conditions provided by the battery thermal management system.Conventional battery thermal management systems have basic temperature control capabilities for most conventional application scenarios.However,with the current development of la rge-scale,integrated,and intelligent battery technology,the adva ncement of battery thermal management technology will pay more attention to the effective control of battery temperature under sophisticated situations,such as high power and widely varied operating conditions.In this context,this paper presents the latest advances and representative research related to battery thermal management system.Firstly,starting from battery thermal profile,the mechanism of battery heat generation is discussed in detail.Secondly,the static characteristics of the traditional battery thermal management system are summarized.Then,considering the dynamic requirements of battery heat dissipation under complex operating conditions,the concept of adaptive battery thermal management system is proposed based on specific research cases.Finally,the main challenges for battery thermal management system in practice are identified,and potential future developments to overcome these challenges are presented and discussed.
文摘Key methods developed and used in the USSR and in the Russian Federation to determine the impact and friction sensitivity of energetic materials and explosives have been discussed.Experimental methodologies and instruments that underlie the assessment of their production and handling safety have been described.Studies of a large number of compounds have revealed relationships between their sensitivity parameters and structure of individual compounds and compositions.The range of change of physical and chemical characteristics for the compounds we examined covers the entire region of their existence.Theoretical methodology and equations have been formulated to estimate the impact and friction sensitivity parameters of energetic materials and to evaluate the technological safety in use.The developed methodology is characterized by high-accuracy calculations and prediction of sensitivity parameters.
文摘Establishing a sound safety construction management system is the first issue of safety construction management of construction projects. Safety management system can greatly promote the standardization of construction projects. Management mainly includes strengthening the executive safety education, enhance the safety awareness of execution, management and the implementation of personal safety, standardize security protection, strict implementation of safety assessment system, strengthen the attention not only to get everything ready before execution, and rectify and solve all illegal behavior, the enforcement of the inhibition of hidden dangers. This paper mainly based on the current situation of China's building safety management, carried out a more in-depth analysis.
文摘With the rapid development of China's economy, science and technology are also constantly innovating and developing, and they are widely used in various industries.Especially in the background of the modern electronic information era, all walks of life are using electronic information technology, especially hospitals have gradually replaced the traditional archives management mode into electronic archives management, which tend to be information and systematic management.However, in terms of the current hospital electronic file management work, there are still some deficiencies, and the management work needs to be improved. Moreover, there are hidden security risks in the electronic information files under the network environment, so the security problems also need to be solved urgently.This paper analyzes the safety situation of hospital electronic archives based on 5W theory, and expounds the advantages, importance and existing problems of electronic archives management, so as to help the safety management of hospital electronic archives in the future.
文摘Generally speaking, the geological topography of coal mine project is complex, which makes coal mining face many safety risks. When coal mining does not pay attention to safety management, it may lead to serious accidents and damage the economic and social benefits of enterprises. Safety management helps to prevent and eliminate safety risks in coal projects, reduce accidents and ensure the healthy development of coal enterprises to a certain extent. From the current situation of China's coal project safety management, there are many problems in the future to achieve the transformation and development of the coal industry, and it is necessary to improve the level of safety management.
文摘The safety instrument system in oil and gas pipeline application form and application methods shall conform to the basic requirement of the state of different oil and gas transportation, at the same time, under the influence of such requirements, related management department should be combined with the operation of the safety instrument system management mechanism, to adjust the running timeliness of such a system, so as to improve the operation of the instrument system response efficiency. In the process of modern safety instrument system operation, some information means can be applied to safety instrument system, so as to improve the actual efficiency of system operation management. More importantly, an effective information feedback loop can be formed to improve the overall quality of the operation and application of the safety instrumentation system. Based on this, this paper first analyzes the application problems of safety instrument system in oil and gas pipeline, and then discusses the methods and suggestions related to system application on the basis of solving such problems.
文摘This paper describes a precise method combining numerical analysis and limit equilibrium theory to determine potential slip surfaces in soil slopes. In this method, the direction of the critical slip surface at any point in a slope is determined using the Coulomb’s strength principle and the extremum principle based on the ratio of the shear strength to the shear stress at that point. The ratio, which is considered as an analysis index, can be computed once the stress field of the soil slope is obtained. The critical slip direction at any point in the slope must be the tangential direction of a potential slip surface passing through the point. Therefore, starting from a point on the top of the slope surface or on the horizontal segment outside the slope toe, the increment with a small distance into the slope is used to choose another point and the corresponding slip direction at the point is computed. Connecting all the points used in the computation forms a potential slip surface exiting at the starting point. Then the factor of safety for any potential slip surface can be computed using limit equilibrium method like Spencer method. After factors of safety for all the potential slip surfaces are obtained, the minimum one is the factor of safety for the slope and the corresponding potential slip surface is the critical slip surface of the slope. The proposed method does not need to pre-assume the shape of potential slip surfaces. Thus it is suitable for any shape of slip surfaces. Moreover the method is very simple to be applied. Examples are presented in this paper to illustrate the feasibility of the proposed method programmed in ANSYS software by macro commands.
基金financially supported by the National Natural Science Foundation of China(Grant No.51178402,10902112)Department of Transportation Technology Projects(Grant No.2011318740240)the Fundamental Research Funds for the Central Universities(Grant No.2682014CX074)
文摘Unlike the limit equilibrium method(LEM), with which only the global safety factor of the landslide can be calculated, a local safety factor(LSF) method is proposed to evaluate the stability of different sections of a landslide in this paper. Based on three-dimensional(3D) numerical simulation results, the local safety factor is defined as the ratio of the shear strength of the soil at an element on the slip zone to the shear stress parallel to the sliding direction at that element. The global safety factor of the landslide is defined as the weighted average of all local safety factors based on the area of the slip surface. Some example analyses show that the results computed by the LSF method agree well with those calculated by the General Limit Equilibrium(GLE) method in two-dimensional(2D) models and the distribution of the LSF in the 3D slip zone is consistent with that indicated by the observed deformation pattern of an actual landslide in China.
文摘The daily operations in the mining industry are still a significant source of risk with regard to occupational safety and health(OS & H). Various research studies and statistical data world-wide show that the number of serious injuries and fatalities still remains high despite substantial efforts the industry has put in recent years in decreasing those numbers. This paper argues that the next level of safety performance will have to consider a transition from coping solely with workplace dangers, to a more systemic model taking organizational risks in consideration. In this aspect, lessons learned from the nuclear industry may be useful, as organizational learning processes are believed to be more universal than the technologies in which they are used. With the notable exception of major accidents, organizational performance has not received all the attention it deserves. A key element for reaching the next level of performance is to include organizational factors in low level events analyses, and approach the management as a risk control system. These factors will then appear not only in the event analysis,but in supervision activities, audits, change management and the like. Many recent event analyses across various industries have shown that organizational factors play a key role in creating conditions for triggering major accidents(aviation, railway transportation, nuclear industry, oil exploitation, mining, etc.).In this paper, a perspective that may be used in supervisory activities, self-assessments and minor events investigations, is presented. When ingrained in an organizational culture, such perspective has the highest potential for continuous safety improvement.
基金Projects(51209118,71373245)supported by the National Natural Science Foundation of ChinaProject(2014JBKY01)supported by the Fundamental Research Funds for CASST,China
文摘The construction of waste rock dumps on existing tailing ponds has been put into practice in China to save precious land resources. This work focuses on the safety assessment of the Daheishan molybdenum mine waste rock dump under construction on two adjoining tailings ponds. The consolidation of the tailings foundation and the filling quality of the waste rock are investigated by the transient electromagnetic method through detecting water-rich areas and loose packing areas, from which, the depth of phreatic line is also estimated. With such information and the material parameters, the numerical method based on shear strength reduction is applied to analyzing the overall stability of the waste rock dump and the tailings ponds over a number of typical cross sections under both current and designed conditions, where the complex geological profiles exposed by site investigation are considered. Through numerical experiments, the influence of soft lenses in the tailings and possible loose packing areas in the waste rock is examined. Although large displacements may develop due to the soft tailings foundation, the results show that the waste rock dump satisfies the safety requirements under both present and designed conditions.
