Forests are facing several challenges related to forest deforestation mostly due to the actions of man. The study used a CA-Markov model to examine land use/land cover dynamics from 1986 to 2022, as well as estimate f...Forests are facing several challenges related to forest deforestation mostly due to the actions of man. The study used a CA-Markov model to examine land use/land cover dynamics from 1986 to 2022, as well as estimate future changes from 2022 to 2052 in the Mount Nlonako forest and peripheries. Three types of Landsat images (Landsat 4 - 5 Thematic Mapper (TM) images of 1986 and 2004, and Landsat 8 Operational Land Imager and Thermal Infrared Sensor (OLI-TIRS) image of 2022) were used for diachronic analysis. The results revealed six major land use/land cover classes namely: Dense forest, Clear forest, Farmland, Savannah, Built-up Area and Bare floor. Accuracy rates for land use/land cover classification ranged from 89.85% to 93.11%. The prediction model was accepted with an overall satisfaction rate of 84.08%. The Dense Forest class has been steadily decreasing from 138320.94 ha (75.42%) in 1986 to 84161.34 ha (45.89%) in 2022, corresponding to a total loss of 54159.6 ha (29.53%) over the 36-year period and is projected to reach 39028.34 ha (21.28%) in 2052 corresponding to a future loss of 45133 ha (24.61%) over a period of 30 years. Anthropogenic factors (mainly agriculture and industrial logging) and natural factors (excess rainfall) were responsible for the degradation of the area. Regardless of the limitations of the CA-Markov model due to the non integration of socio-economic factors, this study is a crucial alert to decison and policy makers to undergo protection procedures for this area to be protected, thereby involving the local communities in the management and restoration of the area through participatory management.展开更多
February 10-12, Sophia Antipolis, France The ETSI Artificial Intelligence Conference—How Standardization is Shaping the Future of AI will take place faceto-face on February 10-12, 2025, in France.The ETSI AI Conferen...February 10-12, Sophia Antipolis, France The ETSI Artificial Intelligence Conference—How Standardization is Shaping the Future of AI will take place faceto-face on February 10-12, 2025, in France.The ETSI AI Conference has been designed to provide attendees with the unique opportunity to exchange with AI subject-experts and learn about the state of the art work that is being done in AI-related standardization, regulation and service deployments.展开更多
The Turpan-Hami(Tuha)Basin in Xinjiang Uygur Autonomous Region of China,holds significant strategic importance as a key economic artery of the ancient Silk Road and the Belt and Road Initiative,necessitating a holisti...The Turpan-Hami(Tuha)Basin in Xinjiang Uygur Autonomous Region of China,holds significant strategic importance as a key economic artery of the ancient Silk Road and the Belt and Road Initiative,necessitating a holistic understanding of the spatiotemporal evolution of land use/land cover(LULC)to foster sustainable planning that is tailored to the region's unique resource endowments.However,existing LULC classification methods demonstrate inadequate accuracy,hindering effective regional planning.In this study,we established a two-level LULC classification system(8 primary types and 22 secondary types)for the Tuha Basin.By employing Landsat 5/7/8 imagery at 5-a intervals,we developed the LULC dataset of the Tuha Basin from 1990 to 2020,conducted the accuracy assessment and spatiotemporal evolution analysis,and simulated the future LULC under various scenarios via the Markov-Future Land Use Simulation(Markov-FLUS)model.The results revealed that the average overall accuracy values of our LULC dataset were 0.917 and 0.864 for the primary types and secondary types,respectively.Compared with the seven mainstream LULC products(GlobeLand30,Global 30-meter Land Cover with Fine Classification System(GLC_FCS30),Finer Resolution Observation and Monitoring of Global Land Cover PLUS(FROM_GLC PLUS),ESA Global Land Cover(ESA_LC),Esri Land Cover(ESRI_LC),China Multi-Period Land Use Land Cover Change Remote Sensing Monitoring Dataset(CNLUCC),and China Annual Land Cover Dataset(CLCD))in 2020,our LULC data exhibited dramatically elevated overall accuracy and provided more precise delineations for land features,thereby yielding high-quality data backups for land resource analyses within the basin.In 2020,unused land(78.0%of the study area)and grassland(18.6%)were the dominant LULC types of the basin;although cropland and construction land constituted less than 1.0%of the total area,they played a vital role in arid land development and primarily situated within oases that form the urban cores of the cities of Turpan and Hami.Between 1990 and 2020,cropland and construction land exhibited a rapid expansion,and the total area of water body decreased yet resurging after 2015 due to an increase in areas of reservoir and pond.In future scenario simulations,significant increases in areas of construction land and cropland are anticipated under the business-as-usual scenario,whereas the wetland area will decrease,suggesting the need for ecological attention under this development pathway.In contrast,the economic development scenario underscores the fast-paced expansion of construction land,primarily from the conversion of unused land,highlighting the significant developmental potential of unused land with a slowing increase in cropland.Special attention should thus be directed toward ecological and cropland protection during development.This study provides data supports and policy recommendations for the sustainable development goals of Tuha Basin and other similar arid areas.展开更多
Medical care has undergone remarkable improvements over the past few decades.One of the most important innovative breakthroughs in modern medicine is the advent of minimally and less invasive treatments.The trend towa...Medical care has undergone remarkable improvements over the past few decades.One of the most important innovative breakthroughs in modern medicine is the advent of minimally and less invasive treatments.The trend towards employing less invasive treatment has been vividly shown in the field of gastroenterology,particularly coloproctology.Parallel to foregut interventions,colorectal surgery has shifted towards a minimally invasive approach.Coloproctology,including both medical and surgical management of colorectal diseases,has undergone a remarkable paradigm shift.The treatment of both benign and malignant colorectal conditions has gradually transitioned towards more conservative and less inva-sive approaches.An interesting paradigm shift was the trend to avoid the need for radical resection of rectal cancer altogether in patients who showed complete response to neoadjuvant treatment.The trend of adopting less invasive appro-aches to treat various colorectal conditions does not seem to be stopping soon as further research on novel,more effective and safer methods is ongoing.展开更多
This paper provides a comprehensive review of the current status, advancements, and future prospects of humanoid robots, highlighting their significance in driving the evolution of next-generation industries. By analy...This paper provides a comprehensive review of the current status, advancements, and future prospects of humanoid robots, highlighting their significance in driving the evolution of next-generation industries. By analyzing various research endeavors and key technologies, encompassing ontology structure,control and decision-making, and perception and interaction, a holistic overview of the current state of humanoid robot research is presented. Furthermore, emerging challenges in the field are identified, emphasizing the necessity for a deeper understanding of biological motion mechanisms, improved structural design,enhanced material applications, advanced drive and control methods, and efficient energy utilization. The integration of bionics, brain-inspired intelligence, mechanics, and control is underscored as a promising direction for the development of advanced humanoid robotic systems. This paper serves as an invaluable resource, offering insightful guidance to researchers in the field,while contributing to the ongoing evolution and potential of humanoid robots across diverse domains.展开更多
Traction power systems(TPSs)play a vital role in the operation of electrified railways.The transformation of conventional railway TPSs to novel structures is not only a trend to promote the development of electrified ...Traction power systems(TPSs)play a vital role in the operation of electrified railways.The transformation of conventional railway TPSs to novel structures is not only a trend to promote the development of electrified railways toward high-efficiency and resilience but also an inevitable requirement to achieve carbon neutrality target.On the basis of sorting out the power supply structures of conventional AC and DC modes,this paper first reviews the characteristics of the existing TPSs,such as weak power supply flexibility and low-energy efficiency.Furthermore,the power supply structures of various TPSs for future electrified railways are described in detail,which satisfy longer distance,low-carbon,high-efficiency,high-reliability and high-quality power supply requirements.Meanwhile,the application prospects of different traction modes are discussed from both technical and economic aspects.Eventually,this paper introduces the research progress of mixed-system electrified railways and traction power supply technologies without catenary system,speculates on the future development trends and challenges of TPSs and predicts that TPSs will be based on the continuous power supply mode,employing power electronic equipment and intelligent information technology to construct a railway comprehensive energy system with renewable energy.展开更多
Safeguarding water resources,aquatic habitats,and ecosystems is paramount for the well-being of the populace,the future of the nation,and the sustainable development of China.With the relentless progression of ecologi...Safeguarding water resources,aquatic habitats,and ecosystems is paramount for the well-being of the populace,the future of the nation,and the sustainable development of China.With the relentless progression of ecological and environmental protection and the establishment of an ecological civilization,China's aquatic ecological environment protection has undergone five decades of exploration.The water environment protection paradigm has gradually transitioned from emphasizing pollutant emission concentration control and total pollutant emission control to prioritizing water environment quality improvement.Particularly in the past decade,regions nationwide have conducted proactive explorations and practices in source control,emission abatement,and quality enhancement.This paper systematically reviews the achievements in China's water environmental quality improvement and the characteristics of water environment management at various stages over the past half-century.Considering the deployment of“three waters”coordination(water resources,water environment,and water ecology),green development,pollution,carbon reduction,and so forth,this paper analyzes the challenges confronted by China's aquatic ecological environment protection.Finally,future directions are prospected from six aspects:green development,climate change response,water resource allocation optimization,collaborative governance of multiple pollutants,aquatic ecological protection strengthening,and intelligent management improvement.展开更多
Climate change is one of the major global challenges and it can have a significant influence on the behaviour and resilience of geotechnical structures.The changes in moisture content in soil lead to effective stress ...Climate change is one of the major global challenges and it can have a significant influence on the behaviour and resilience of geotechnical structures.The changes in moisture content in soil lead to effective stress changes and can be accompanied by significant volume changes in reactive/expansive soils.The volume change leads to ground movement and can exert additional stresses on structures founded on or within a shallow depth of such soils.Climate change is likely to amplify the ground movement potential and the associated problems are likely to worsen.The effect of atmospheric boundary interaction on soil behaviour has often been correlated to Thornthwaite moisture index(TMI).In this study,the long-term weather data and anticipated future projections for various emission scenarios were used to generate a series of TMI maps for Australia.The changes in TMI were then correlated to the depth of suction change(H s),an important input in ground movement calculation.Under all climate scenarios considered,reductions in TMI and increases in H s values were observed.A hypothetical design scenario of a footing on expansive soil under current and future climate is discussed.It is observed that a design that might be considered adequate under the current climate scenario,may fail under future scenarios and accommodations should be made in the design for such events.展开更多
The 21^(st) century has started with several innovations in the medical sciences,with wide applications in health care management.This development has taken in the field of medicines(newer drugs/molecules),various too...The 21^(st) century has started with several innovations in the medical sciences,with wide applications in health care management.This development has taken in the field of medicines(newer drugs/molecules),various tools and technology which has completely changed the patient management including abdominal surgery.Surgery for abdominal diseases has moved from maximally invasive to minimally invasive(laparoscopic and robotic)surgery.Some of the newer medicines have its impact on need for surgical intervention.This article focuses on the development of these emerging molecules,tools,and technology and their impact on present surgical form and its future effects on the surgical intervention in gastroenterological diseases.展开更多
Together for a Shared Future Compiled by Global Young Leaders Dialogue Price:RMB 118 Paperback,250 pages Published by Foreign Languages Press Together for a Shared Future is co-authored by 35 young people from 26 coun...Together for a Shared Future Compiled by Global Young Leaders Dialogue Price:RMB 118 Paperback,250 pages Published by Foreign Languages Press Together for a Shared Future is co-authored by 35 young people from 26 countries who participated in the project China Tour of the Global Young Leaders Dialogue(GYLD),an institutional platform for idea-sharing among young people from different countries.展开更多
On September 4,the"Strengthening Youth Exchange to Build a Friendly Future"China-Laos Youth Dialogue was held at the National University of Laos (NUOL) in Vientiane with an aim to consolidate bilateral frien...On September 4,the"Strengthening Youth Exchange to Build a Friendly Future"China-Laos Youth Dialogue was held at the National University of Laos (NUOL) in Vientiane with an aim to consolidate bilateral friendship,promote the building of a ChinaLaos community with a shared future,and strengthen exchanges and cooperation between the youth of both countries.展开更多
The 6th Future Energy Convention(FEC2024)was held in Suzhou,Jiangsu Province from September 5 to September 7,2024,and was successfully concluded.This convention was organized by the China Energy Research Society and C...The 6th Future Energy Convention(FEC2024)was held in Suzhou,Jiangsu Province from September 5 to September 7,2024,and was successfully concluded.This convention was organized by the China Energy Research Society and China Energy Net,with the theme of“New Quality Development of Future Energy”.The convention included one main forum and four thematic forums.The main forum comprised the Future Energy Academician Forum,Dialogue among Global Outstanding Leaders,and Future Energy International Forum;the four thematic forums included the Future Energy Global CTO Forum,Carbon Neutrality Industrial Cooperation,Advanced Nuclear Energy-Focusing on Nuclear Fusion,and“AI+”Empowering Green and Low-Carbon Transformation.展开更多
In modern warfare,unpowered glide munitions,represented by JDAM,are widely used.Accurately predicting the future trajectory of such targets is crucial for intercepting them.This paper proposes a future point predictio...In modern warfare,unpowered glide munitions,represented by JDAM,are widely used.Accurately predicting the future trajectory of such targets is crucial for intercepting them.This paper proposes a future point prediction method for unpowered gliding targets based on attitude computation.By estimating the current state of the target,we derive the target’s attitude coordinate system.Subsequently,the paper analyzes the forces acting on the target and updates the state transition matrix,ultimately calculating the future position of the target.Experimental results show that,compared to traditional methods,this approach improves the accuracy of future point predictions by 9%to 45%.展开更多
Purpose:To explore the relationship between digital literacy and the employability of college students,and to investigate the mechanism by which future time perspective and career decision self-efficacy play a role.Me...Purpose:To explore the relationship between digital literacy and the employability of college students,and to investigate the mechanism by which future time perspective and career decision self-efficacy play a role.Method:A survey was conducted on 577 college students using the Digital Literacy Scale,Employability Scale,Career Decision Self-Efficacy Scale,and Future Time Perspective Scale.Results:(1)Digital literacy,future time perspective,career decision self-efficacy,and employability are all significantly positively correlated with each other(r=0.65-0.78,P<0.001).(2)Digital literacy significantly positively predicts future time perspective,career decision self-efficacy,and employability.At the same time,future time perspective and career decision self-efficacy can both positively predict employability significantly.(3)Future time perspective and career decision self-efficacy have a parallel mediating effect between digital literacy and the employability of vocational undergraduate students.Conclusion:Digital literacy can directly affect college students’employability and can also indirectly affect college students’employability through future time perspective and career decision self-efficacy.展开更多
The purpose of the present study was to describe and provide insight on Detroit’s music industry,with the practical goal to inform the current state of music in Detroit and draw conclusive suggestions for bringing mu...The purpose of the present study was to describe and provide insight on Detroit’s music industry,with the practical goal to inform the current state of music in Detroit and draw conclusive suggestions for bringing music back to a forefront of Detroit.The study drew on a sample of convenience(N=4)by researcher networking and past work in the Detroit music industry.Eight themes were identified in a content analysis of interview responses.The study revealed a deep and common vision shared among diverse industry professionals-to bring national recognition back to Detroit.Everyone wants Detroit’s music industry to make a comeback,however,they realize it is a slow process to achieve that goal.展开更多
Similar to the method of continuum mechanics, the variation of the price of index futures is viewed to be continuous and regular. According to the characteristic of index futures, a basic equation of price of index fu...Similar to the method of continuum mechanics, the variation of the price of index futures is viewed to be continuous and regular. According to the characteristic of index futures, a basic equation of price of index futures was established. It is a differential equation, its solution shows that the relation between time and price forms a logarithmic circle. If the time is thought of as the probability of its corresponding price, then such a relation is perfectly coincided with the main assumption of the famous formula of option pricing, based on statistical theory, established by Black and Scholes winner of 1997 Nobel' prize on economy. In that formula, the probability of price of basic assets (they stand for index futures here) is assummed to be a logarithmic normal distribution. This agreement shows that the same result may be obtained by two analytic methods with different bases. However, the result, given by assumption by Black-Scholes, is derived from the solution of the differential equation.展开更多
This paper shows prospective methodology as a tool to generate strategic knowledge for designing sustainable futures. The strategic prospective is a social science discipline dedicated to explore the future. Based on ...This paper shows prospective methodology as a tool to generate strategic knowledge for designing sustainable futures. The strategic prospective is a social science discipline dedicated to explore the future. Based on qualitative methods with participative experts and stakeholders, the strategic prospective allows designing different future scenarios and planning the transformation of a current situation into a desired future. To design sustainable futures, this paper proposes a four-stage methodology： understanding the context; strategy visualization; design of alternative scenarios and definition of desired future; and planning its construction. This methodology makes evident the possibility of seeking alternative scenarios for a sustainable future in different scopes, particularly, in two prospective applications： biodiversity conservation and water treatment. The outcomes of the application have allowed proposing strategies and policies for the management of environmental goods, such as environmental services and water reuse, with a long-time outlook based on a collective desired future.展开更多
An empirical test on long memory between price and trading volume of China metals futures market was given with MF-DCCA method. The empirical results show that long memory feature with a certain period exists in price...An empirical test on long memory between price and trading volume of China metals futures market was given with MF-DCCA method. The empirical results show that long memory feature with a certain period exists in price-volume correlation and a fittther proof was given by analyzing the source of multifractal feature. The empirical results suggest that it is of important practical significance to bring the fractal market theory and other nonlinear theory into the analysis and explanation of the behavior in metal futures market.展开更多
The sea-level change is resulted from superposition of sun, moon and other planeries, and earth itself, biological process, atmosphere and oceanography, as well as artificial actions. As a result, the sea level change...The sea-level change is resulted from superposition of sun, moon and other planeries, and earth itself, biological process, atmosphere and oceanography, as well as artificial actions. As a result, the sea level change is really a sensitive integral variation value of many variations, or a combined function of coupling effects of various big systems. Therefore the above mentioned superposed action of different systems and the coupling effect of sun earth and biological aspects may be called as sun earth biological coupling effect system. Based on this hypothesis, the corresponding sun dynamic, air dynamic, water dynamic and earth dynamic conceptional models are established in order to research the multiple coupling effects and feedback machsnism between these big systems. In order to determine the relations, effectness and coherent relation of different variations, the quantity, analysis is conducted through collective variation and stage division. The quantity analysis indicates that the earths spindle rotation speed is the dynamic mechanism controlling the sea level change of fluctuation. The change rate of sea level in the world is ＋1.32 ＋ 0.22 mm/a, while the sea level change rate in China is only＋1.39 ＋ 0.26 mm/a in average. If take the CO2 content as the climate marker, eight cold stages （periods） are grouped out since two hundreds years AC. The extreme cold of the eighth cold stage started approximately at 1850 years AC. and if the stage from the extreme cold to extreme warm is determined as long as 200 years, the present ongoing warm stage will end at about 2050 years, there after the temperature will begin to tower. If the stage between cold and warm extremes lasts for 250 years, then the temperature will become lower at about 2100 year. Until to that time, the sea-level is estimated to raise ＋7 - ＋11 ＋ 3.5 cm again, and there after, the sea level will begin the new lowering trend. In the same time, the climate will enter into next new cold stage subsequently.展开更多
文摘Forests are facing several challenges related to forest deforestation mostly due to the actions of man. The study used a CA-Markov model to examine land use/land cover dynamics from 1986 to 2022, as well as estimate future changes from 2022 to 2052 in the Mount Nlonako forest and peripheries. Three types of Landsat images (Landsat 4 - 5 Thematic Mapper (TM) images of 1986 and 2004, and Landsat 8 Operational Land Imager and Thermal Infrared Sensor (OLI-TIRS) image of 2022) were used for diachronic analysis. The results revealed six major land use/land cover classes namely: Dense forest, Clear forest, Farmland, Savannah, Built-up Area and Bare floor. Accuracy rates for land use/land cover classification ranged from 89.85% to 93.11%. The prediction model was accepted with an overall satisfaction rate of 84.08%. The Dense Forest class has been steadily decreasing from 138320.94 ha (75.42%) in 1986 to 84161.34 ha (45.89%) in 2022, corresponding to a total loss of 54159.6 ha (29.53%) over the 36-year period and is projected to reach 39028.34 ha (21.28%) in 2052 corresponding to a future loss of 45133 ha (24.61%) over a period of 30 years. Anthropogenic factors (mainly agriculture and industrial logging) and natural factors (excess rainfall) were responsible for the degradation of the area. Regardless of the limitations of the CA-Markov model due to the non integration of socio-economic factors, this study is a crucial alert to decison and policy makers to undergo protection procedures for this area to be protected, thereby involving the local communities in the management and restoration of the area through participatory management.
文摘February 10-12, Sophia Antipolis, France The ETSI Artificial Intelligence Conference—How Standardization is Shaping the Future of AI will take place faceto-face on February 10-12, 2025, in France.The ETSI AI Conference has been designed to provide attendees with the unique opportunity to exchange with AI subject-experts and learn about the state of the art work that is being done in AI-related standardization, regulation and service deployments.
基金supported by the Third Xinjiang Scientific Expedition Program (2022xjkk1100)the Tianchi Talent Project
文摘The Turpan-Hami(Tuha)Basin in Xinjiang Uygur Autonomous Region of China,holds significant strategic importance as a key economic artery of the ancient Silk Road and the Belt and Road Initiative,necessitating a holistic understanding of the spatiotemporal evolution of land use/land cover(LULC)to foster sustainable planning that is tailored to the region's unique resource endowments.However,existing LULC classification methods demonstrate inadequate accuracy,hindering effective regional planning.In this study,we established a two-level LULC classification system(8 primary types and 22 secondary types)for the Tuha Basin.By employing Landsat 5/7/8 imagery at 5-a intervals,we developed the LULC dataset of the Tuha Basin from 1990 to 2020,conducted the accuracy assessment and spatiotemporal evolution analysis,and simulated the future LULC under various scenarios via the Markov-Future Land Use Simulation(Markov-FLUS)model.The results revealed that the average overall accuracy values of our LULC dataset were 0.917 and 0.864 for the primary types and secondary types,respectively.Compared with the seven mainstream LULC products(GlobeLand30,Global 30-meter Land Cover with Fine Classification System(GLC_FCS30),Finer Resolution Observation and Monitoring of Global Land Cover PLUS(FROM_GLC PLUS),ESA Global Land Cover(ESA_LC),Esri Land Cover(ESRI_LC),China Multi-Period Land Use Land Cover Change Remote Sensing Monitoring Dataset(CNLUCC),and China Annual Land Cover Dataset(CLCD))in 2020,our LULC data exhibited dramatically elevated overall accuracy and provided more precise delineations for land features,thereby yielding high-quality data backups for land resource analyses within the basin.In 2020,unused land(78.0%of the study area)and grassland(18.6%)were the dominant LULC types of the basin;although cropland and construction land constituted less than 1.0%of the total area,they played a vital role in arid land development and primarily situated within oases that form the urban cores of the cities of Turpan and Hami.Between 1990 and 2020,cropland and construction land exhibited a rapid expansion,and the total area of water body decreased yet resurging after 2015 due to an increase in areas of reservoir and pond.In future scenario simulations,significant increases in areas of construction land and cropland are anticipated under the business-as-usual scenario,whereas the wetland area will decrease,suggesting the need for ecological attention under this development pathway.In contrast,the economic development scenario underscores the fast-paced expansion of construction land,primarily from the conversion of unused land,highlighting the significant developmental potential of unused land with a slowing increase in cropland.Special attention should thus be directed toward ecological and cropland protection during development.This study provides data supports and policy recommendations for the sustainable development goals of Tuha Basin and other similar arid areas.
文摘Medical care has undergone remarkable improvements over the past few decades.One of the most important innovative breakthroughs in modern medicine is the advent of minimally and less invasive treatments.The trend towards employing less invasive treatment has been vividly shown in the field of gastroenterology,particularly coloproctology.Parallel to foregut interventions,colorectal surgery has shifted towards a minimally invasive approach.Coloproctology,including both medical and surgical management of colorectal diseases,has undergone a remarkable paradigm shift.The treatment of both benign and malignant colorectal conditions has gradually transitioned towards more conservative and less inva-sive approaches.An interesting paradigm shift was the trend to avoid the need for radical resection of rectal cancer altogether in patients who showed complete response to neoadjuvant treatment.The trend of adopting less invasive appro-aches to treat various colorectal conditions does not seem to be stopping soon as further research on novel,more effective and safer methods is ongoing.
基金supported by the National Natural Science Foundation of China(62303457,U21A20482)Project funded by China Postdoctoral Science Foundation (2023M733737)the National Key R&D Program of China(2022YFB3303800)。
文摘This paper provides a comprehensive review of the current status, advancements, and future prospects of humanoid robots, highlighting their significance in driving the evolution of next-generation industries. By analyzing various research endeavors and key technologies, encompassing ontology structure,control and decision-making, and perception and interaction, a holistic overview of the current state of humanoid robot research is presented. Furthermore, emerging challenges in the field are identified, emphasizing the necessity for a deeper understanding of biological motion mechanisms, improved structural design,enhanced material applications, advanced drive and control methods, and efficient energy utilization. The integration of bionics, brain-inspired intelligence, mechanics, and control is underscored as a promising direction for the development of advanced humanoid robotic systems. This paper serves as an invaluable resource, offering insightful guidance to researchers in the field,while contributing to the ongoing evolution and potential of humanoid robots across diverse domains.
基金supported in part by the Scientific Foundation for Outstanding Young Scientists of Sichuan under Grant No.2021JDJQ0032in part by the National Natural Science Foundation of China under Grant No.52107128in part by the Natural Science Foundation of Sichuan Province under Grant No.2022NSFSC0436.
文摘Traction power systems(TPSs)play a vital role in the operation of electrified railways.The transformation of conventional railway TPSs to novel structures is not only a trend to promote the development of electrified railways toward high-efficiency and resilience but also an inevitable requirement to achieve carbon neutrality target.On the basis of sorting out the power supply structures of conventional AC and DC modes,this paper first reviews the characteristics of the existing TPSs,such as weak power supply flexibility and low-energy efficiency.Furthermore,the power supply structures of various TPSs for future electrified railways are described in detail,which satisfy longer distance,low-carbon,high-efficiency,high-reliability and high-quality power supply requirements.Meanwhile,the application prospects of different traction modes are discussed from both technical and economic aspects.Eventually,this paper introduces the research progress of mixed-system electrified railways and traction power supply technologies without catenary system,speculates on the future development trends and challenges of TPSs and predicts that TPSs will be based on the continuous power supply mode,employing power electronic equipment and intelligent information technology to construct a railway comprehensive energy system with renewable energy.
基金National Natural Science Foundation of China,Grant/Award Number:42107503National Key Research and Development Program of China,Grant/Award Number:SQ2022YFC3200080。
文摘Safeguarding water resources,aquatic habitats,and ecosystems is paramount for the well-being of the populace,the future of the nation,and the sustainable development of China.With the relentless progression of ecological and environmental protection and the establishment of an ecological civilization,China's aquatic ecological environment protection has undergone five decades of exploration.The water environment protection paradigm has gradually transitioned from emphasizing pollutant emission concentration control and total pollutant emission control to prioritizing water environment quality improvement.Particularly in the past decade,regions nationwide have conducted proactive explorations and practices in source control,emission abatement,and quality enhancement.This paper systematically reviews the achievements in China's water environmental quality improvement and the characteristics of water environment management at various stages over the past half-century.Considering the deployment of“three waters”coordination(water resources,water environment,and water ecology),green development,pollution,carbon reduction,and so forth,this paper analyzes the challenges confronted by China's aquatic ecological environment protection.Finally,future directions are prospected from six aspects:green development,climate change response,water resource allocation optimization,collaborative governance of multiple pollutants,aquatic ecological protection strengthening,and intelligent management improvement.
基金supported by President’s Scholarships from the University of South Australia towards his PhD study。
文摘Climate change is one of the major global challenges and it can have a significant influence on the behaviour and resilience of geotechnical structures.The changes in moisture content in soil lead to effective stress changes and can be accompanied by significant volume changes in reactive/expansive soils.The volume change leads to ground movement and can exert additional stresses on structures founded on or within a shallow depth of such soils.Climate change is likely to amplify the ground movement potential and the associated problems are likely to worsen.The effect of atmospheric boundary interaction on soil behaviour has often been correlated to Thornthwaite moisture index(TMI).In this study,the long-term weather data and anticipated future projections for various emission scenarios were used to generate a series of TMI maps for Australia.The changes in TMI were then correlated to the depth of suction change(H s),an important input in ground movement calculation.Under all climate scenarios considered,reductions in TMI and increases in H s values were observed.A hypothetical design scenario of a footing on expansive soil under current and future climate is discussed.It is observed that a design that might be considered adequate under the current climate scenario,may fail under future scenarios and accommodations should be made in the design for such events.
文摘The 21^(st) century has started with several innovations in the medical sciences,with wide applications in health care management.This development has taken in the field of medicines(newer drugs/molecules),various tools and technology which has completely changed the patient management including abdominal surgery.Surgery for abdominal diseases has moved from maximally invasive to minimally invasive(laparoscopic and robotic)surgery.Some of the newer medicines have its impact on need for surgical intervention.This article focuses on the development of these emerging molecules,tools,and technology and their impact on present surgical form and its future effects on the surgical intervention in gastroenterological diseases.
文摘Together for a Shared Future Compiled by Global Young Leaders Dialogue Price:RMB 118 Paperback,250 pages Published by Foreign Languages Press Together for a Shared Future is co-authored by 35 young people from 26 countries who participated in the project China Tour of the Global Young Leaders Dialogue(GYLD),an institutional platform for idea-sharing among young people from different countries.
文摘On September 4,the"Strengthening Youth Exchange to Build a Friendly Future"China-Laos Youth Dialogue was held at the National University of Laos (NUOL) in Vientiane with an aim to consolidate bilateral friendship,promote the building of a ChinaLaos community with a shared future,and strengthen exchanges and cooperation between the youth of both countries.
文摘The 6th Future Energy Convention(FEC2024)was held in Suzhou,Jiangsu Province from September 5 to September 7,2024,and was successfully concluded.This convention was organized by the China Energy Research Society and China Energy Net,with the theme of“New Quality Development of Future Energy”.The convention included one main forum and four thematic forums.The main forum comprised the Future Energy Academician Forum,Dialogue among Global Outstanding Leaders,and Future Energy International Forum;the four thematic forums included the Future Energy Global CTO Forum,Carbon Neutrality Industrial Cooperation,Advanced Nuclear Energy-Focusing on Nuclear Fusion,and“AI+”Empowering Green and Low-Carbon Transformation.
文摘In modern warfare,unpowered glide munitions,represented by JDAM,are widely used.Accurately predicting the future trajectory of such targets is crucial for intercepting them.This paper proposes a future point prediction method for unpowered gliding targets based on attitude computation.By estimating the current state of the target,we derive the target’s attitude coordinate system.Subsequently,the paper analyzes the forces acting on the target and updates the state transition matrix,ultimately calculating the future position of the target.Experimental results show that,compared to traditional methods,this approach improves the accuracy of future point predictions by 9%to 45%.
基金Guangdong Business and Technology University Undergraduate Vocational Education Reform Project(GDGSGY2023007)。
文摘Purpose:To explore the relationship between digital literacy and the employability of college students,and to investigate the mechanism by which future time perspective and career decision self-efficacy play a role.Method:A survey was conducted on 577 college students using the Digital Literacy Scale,Employability Scale,Career Decision Self-Efficacy Scale,and Future Time Perspective Scale.Results:(1)Digital literacy,future time perspective,career decision self-efficacy,and employability are all significantly positively correlated with each other(r=0.65-0.78,P<0.001).(2)Digital literacy significantly positively predicts future time perspective,career decision self-efficacy,and employability.At the same time,future time perspective and career decision self-efficacy can both positively predict employability significantly.(3)Future time perspective and career decision self-efficacy have a parallel mediating effect between digital literacy and the employability of vocational undergraduate students.Conclusion:Digital literacy can directly affect college students’employability and can also indirectly affect college students’employability through future time perspective and career decision self-efficacy.
文摘The purpose of the present study was to describe and provide insight on Detroit’s music industry,with the practical goal to inform the current state of music in Detroit and draw conclusive suggestions for bringing music back to a forefront of Detroit.The study drew on a sample of convenience(N=4)by researcher networking and past work in the Detroit music industry.Eight themes were identified in a content analysis of interview responses.The study revealed a deep and common vision shared among diverse industry professionals-to bring national recognition back to Detroit.Everyone wants Detroit’s music industry to make a comeback,however,they realize it is a slow process to achieve that goal.
文摘Similar to the method of continuum mechanics, the variation of the price of index futures is viewed to be continuous and regular. According to the characteristic of index futures, a basic equation of price of index futures was established. It is a differential equation, its solution shows that the relation between time and price forms a logarithmic circle. If the time is thought of as the probability of its corresponding price, then such a relation is perfectly coincided with the main assumption of the famous formula of option pricing, based on statistical theory, established by Black and Scholes winner of 1997 Nobel' prize on economy. In that formula, the probability of price of basic assets (they stand for index futures here) is assummed to be a logarithmic normal distribution. This agreement shows that the same result may be obtained by two analytic methods with different bases. However, the result, given by assumption by Black-Scholes, is derived from the solution of the differential equation.
文摘This paper shows prospective methodology as a tool to generate strategic knowledge for designing sustainable futures. The strategic prospective is a social science discipline dedicated to explore the future. Based on qualitative methods with participative experts and stakeholders, the strategic prospective allows designing different future scenarios and planning the transformation of a current situation into a desired future. To design sustainable futures, this paper proposes a four-stage methodology： understanding the context; strategy visualization; design of alternative scenarios and definition of desired future; and planning its construction. This methodology makes evident the possibility of seeking alternative scenarios for a sustainable future in different scopes, particularly, in two prospective applications： biodiversity conservation and water treatment. The outcomes of the application have allowed proposing strategies and policies for the management of environmental goods, such as environmental services and water reuse, with a long-time outlook based on a collective desired future.
基金Project(13&ZD024)supported by the Major Program of the National Social Science Fund of ChinaProject(71073177)supported by the National Natural Science Foundation of China+3 种基金Project(CX2012B107)supported by the Graduate Student Innovation Project of Hunan Province,ChinaProject(13YJAZH149)supported by the Social Science Fund of Ministry of Education of ChinaProject(2011ZK2043)supported by the Key Program of the Soft Science Research Project of Hunan Province,ChinaProject(12JJ4077)supported by Natural Science Foundation of Hunan Province of China
文摘An empirical test on long memory between price and trading volume of China metals futures market was given with MF-DCCA method. The empirical results show that long memory feature with a certain period exists in price-volume correlation and a fittther proof was given by analyzing the source of multifractal feature. The empirical results suggest that it is of important practical significance to bring the fractal market theory and other nonlinear theory into the analysis and explanation of the behavior in metal futures market.
基金supported by the National Natural Foundation of China(40940025)National Science Foundation of Tianjin(07ZCGYSF02400,09JCYBJC07400)+2 种基金Program of China"973"(2007CB411807)Open Fund of the Key Lab of Global Change and Marine-Atmospheric Chemistry,SOA(GCMAC0806)National Natural ScienceFoundation(41006002)
文摘The sea-level change is resulted from superposition of sun, moon and other planeries, and earth itself, biological process, atmosphere and oceanography, as well as artificial actions. As a result, the sea level change is really a sensitive integral variation value of many variations, or a combined function of coupling effects of various big systems. Therefore the above mentioned superposed action of different systems and the coupling effect of sun earth and biological aspects may be called as sun earth biological coupling effect system. Based on this hypothesis, the corresponding sun dynamic, air dynamic, water dynamic and earth dynamic conceptional models are established in order to research the multiple coupling effects and feedback machsnism between these big systems. In order to determine the relations, effectness and coherent relation of different variations, the quantity, analysis is conducted through collective variation and stage division. The quantity analysis indicates that the earths spindle rotation speed is the dynamic mechanism controlling the sea level change of fluctuation. The change rate of sea level in the world is ＋1.32 ＋ 0.22 mm/a, while the sea level change rate in China is only＋1.39 ＋ 0.26 mm/a in average. If take the CO2 content as the climate marker, eight cold stages （periods） are grouped out since two hundreds years AC. The extreme cold of the eighth cold stage started approximately at 1850 years AC. and if the stage from the extreme cold to extreme warm is determined as long as 200 years, the present ongoing warm stage will end at about 2050 years, there after the temperature will begin to tower. If the stage between cold and warm extremes lasts for 250 years, then the temperature will become lower at about 2100 year. Until to that time, the sea-level is estimated to raise ＋7 - ＋11 ＋ 3.5 cm again, and there after, the sea level will begin the new lowering trend. In the same time, the climate will enter into next new cold stage subsequently.
