IPSAS was accepted by Jordan’s government in accordance with worldwide trends.The Jordanian Ministry of Finance launched cash-basis IPSAS in 2015 and planned to implement accrual accounting by January 1,2021.However,...IPSAS was accepted by Jordan’s government in accordance with worldwide trends.The Jordanian Ministry of Finance launched cash-basis IPSAS in 2015 and planned to implement accrual accounting by January 1,2021.However,the commitment to change remains uneven,hindering the full shift.Moving from old accounting processes to new ones is tough.Even then,it hasn’t been implemented,creating a gap due to the difficulty in committing to new accounting standards throughout implementation due to obstacles.Thus,knowing government accountants’issues is essential to applying IPSAS in government accounting.This study examines how transformational leadership affects government accountants’commitment to IPSAS adoption in Jordan’s public sector.This study used a quantitative approach to survey Jordanian Ministry of Finance accountants.The 384-person study had a 78%response rate.Additionally,PLS-SEM was used to confirm variable relationships.Transformational leadership positively predicted IPSAS implementation,according to the study.展开更多
Leadership is a complex process.It is one of the most researched areas around the world.It has gained importance in every walk of life from politics to business and from education to social organizations.According to ...Leadership is a complex process.It is one of the most researched areas around the world.It has gained importance in every walk of life from politics to business and from education to social organizations.According to the study of"Leadership in Adult Education Venues",here has a much more clear recognition of leadership:leadership is a process whereby an individual influences a group of individuals to achieve a common goal.There are many approaches of leadership throughout the study of this class,the three theories of leadership I choose to describe in this paper are:Leader-Member Exchange(LMX)Theory,Transformational Leadership,and Team Leadership.展开更多
This paper examines the role of transformational leadership in transforming an organization into a knowledge based, then into learning organization so that it becomes an innovative company. Important features of the l...This paper examines the role of transformational leadership in transforming an organization into a knowledge based, then into learning organization so that it becomes an innovative company. Important features of the leader such and ability to assist in developing and accommodating the implementation of knowledge management programs, learning organization concepts and innovation protocols are discussed in this paper. This paper demonstrates that shifting the organization to become a knowledge based and then to be learning organization and finally to become innovative company could involve some unique attributes of a transformation leadership. In that regards, the paper also demonstrates that organizations need first to create, capture, transfer, and mobilize knowledge before it can be used for learning and then for innovation. The paper will present a method of a studying how successful innovation leaders of companies could found themselves acting in three roles namely： knowledge leader, learning leader and then innovation leader.展开更多
Colorectal cancer liver metastases （CLM） treatment is very important given the high incidence of colorectal cancer with liver metastases, which are primarily treated by surgical resection. Transformational therapy s...Colorectal cancer liver metastases （CLM） treatment is very important given the high incidence of colorectal cancer with liver metastases, which are primarily treated by surgical resection. Transformational therapy such as systemic chemotherapy, hepatic arterial infusion （HAl）, portal vein embolization （PVE）, ablation therapy, and targeted therapy, should be applied to CLM patients who are unable to undergo immediate surgery to improve patients＇ survival and quality of life.展开更多
The transformational journey archetype begins long before literature in rites of initiation when a child undergoes a journey full of tests and temptations, perilous encounters in an underworld, and visions that transf...The transformational journey archetype begins long before literature in rites of initiation when a child undergoes a journey full of tests and temptations, perilous encounters in an underworld, and visions that transform the child into a member of a tribe. Before this archetype is translated by the written word into literature, the telling of the story is not just the account of something that happened long ago in the past, but an actual reenactment of the events for the audience. The journey archetype appears in the earliest example of literature, Homer＇s Odyssey, where Homer makes the readers both an observer and participant in the transformation. The journey does not always, as in rites of initiation, involve a child and occur only once in life. Instead, the journey may begin in death and trauma and involve a person who must resume that journey over again as an adult. Such is the fate of Aeneas in Virgil＇s Aeneid whose transformative journey begins with the burning towers of Troy. In these two early epics the heroes suffer the loss of an older world and must resume their pursuit of new identities in a new world after descending to a land of death or underworld to consult ancestor figures who prepare them for the transition to a new life, identity, and destiny. The reader of these works participates in the journeys the heroes undertake and learns to renew contact with the sources of life and consciousness in myth, magic, and vision. Dante＇s journey through the Inferno to his vision of God in Paradiso is a culmination of this transformative experience and vision, whose intent is to transform us as well through imaginative and intellectual participation in the journey. In Jorge Luis Borges＇s parody of Dante in his story, ＂El Aleph＂, Borges goes beyond Dante in making the reader, not only a participant in the journey and vision, but a ＂writer＂ whom Borges evokes to transform the impossible vision of the Aleph into an illusion of reality. Unlike Dante＇s positive transformational vision of the universe as a harmonious cosmos embraced within the vision of God as if it were a book uniting its multiple pages in one binding, the vision of the Aleph confronts the protagonist and readers with a universe that is random and chaotic, a vision that is disillusioning rather than transformational.展开更多
Teacher performance is an important factor to improve education performance. This study aimed to analyze the effect of the work ethics, transformational, and transactional leadership style on teacher performance. The ...Teacher performance is an important factor to improve education performance. This study aimed to analyze the effect of the work ethics, transformational, and transactional leadership style on teacher performance. The experiment was conducted in public high school No. 112 Jakarta. A total of 50 teachers were included as samples, where they were given the questionnaires to be filled by self-rating. Data were analyzed with multiple linear regression model and processed with SPSS version 20. Results showed that transformational leadership, transactional leadership and work ethics have positive and significant impacts on teacher performance both simultaneously and individually.展开更多
With rising costs of capital, labor and energy, cost efficiency and cost management have become important questions confronting the next stage of China＇s economic growth. By building a parametric cost frontier model ...With rising costs of capital, labor and energy, cost efficiency and cost management have become important questions confronting the next stage of China＇s economic growth. By building a parametric cost frontier model using panel data, this paper investigates the drivers of economic growth transformation from a cost perspective. According to our research, among various effects triggering corporate cost variations and in addition to the expansion of production scale, the largest effect is from technological progress, followed by the effect of factor price adjustment and the effect of efficiency gains. Within the decomposition of factor price adjustment effect, the energy factor effect is the most significant. Furthermore, energy price fluctuations are likely to become major factors restricting saving-based growth. Further study reveals that both the ownership reform and opening up of SOEs are favorable to reducing the costs generated by inefficiency. This paper provides empirical evidence for the driving mechanism of saving-based growth transformation as well as empirical evidence to support to the further deepening of property rights and market-oriented reforms.展开更多
This paper provides a different meaning on the role of the Pastor or Ministry Leader as a ＂servant leader＂ referencing the text--＂Pastor： The Theology and Practice of Ordained Ministry＂ by William H. Willimon （2...This paper provides a different meaning on the role of the Pastor or Ministry Leader as a ＂servant leader＂ referencing the text--＂Pastor： The Theology and Practice of Ordained Ministry＂ by William H. Willimon （2002）, where the author describes the ordained ministry as ＂a is a gift of God to the church＂ which usually does not mean that it is an easy task but rather, more complex and challenging as ministry leaders or pastors feel a call to transforming societies beyond their calling. In post-modern society, the pastors＇ role has differed and extended to form in line with creating a just and beloved community. In such communities, the pastor has more interaction with the community and the day to day activities of its neighbors or hosts. The purpose of this paper is to understand leadership and the role of the Ministry leader as a transformational leader, that goes beyond the role of being a servant leader.展开更多
This research was conducted to identify the emerging leadership style being practiced by successful entrepreneurs and the leadership behavior they frequently applied. Since, leadership style and behavior has a huge in...This research was conducted to identify the emerging leadership style being practiced by successful entrepreneurs and the leadership behavior they frequently applied. Since, leadership style and behavior has a huge influence to the success of the entrepreneur＇s enterprise. One hundred and fifty （150） successful entrepreneurs was the respondent of this study and they were survey and interviewed about their actual leadership style and practices. The research design was qualitative-descriptive type of research with the use of the Multifactor Leadership Questionnaire 5X （MLQ 5X） as the survey instrument to collect data regarding leadership styles of successful entrepreneurs. An interview guide questions was likewise utilized for validating the result of the study. An in-depth semi-structured interview was also conducted to 30 entrepreneurs from the 150 respondents. Findings of the study revealed that a successful entrepreneur exhibits a noticeably higher inclination toward transformational leadership and they consistently rated themselves higher in inspirational motivation for their leadership behavior. Therefore, the emerging leadership style of successful entrepreneurs is the transformational leadership and the leadership behavior that they frequently use is the inspirational motivation. Furthermore, the aimed of this study is to explore practices of transformational leadership behavior of successful entrepreneurs from entrepreneur＇s perspective.展开更多
Much has been written and researched about transformational change and the exogenous events that result in radical institutional transformation （Di Maggio ＆ Powell, 1983; Hannan＆ Freeman, 1989; Fligstein, 1996; Zor...Much has been written and researched about transformational change and the exogenous events that result in radical institutional transformation （Di Maggio ＆ Powell, 1983; Hannan＆ Freeman, 1989; Fligstein, 1996; Zorn, Dobbin, ＆ Kwok, 2006）. Accounts are provided of external agents disturbing the existing stasis of the institution and transforming the institution into something else that reflect a new paradigm or set of interests. Often, what is neglected in these accounts is what fractures exist in the original institution that would make them vulnerable and allow penetration by exogenous influences. Mahoney and Thelen （20 l 0） went beyond a general model of change that described the collapse of one set of institutional norms to be replaced by another. The model of change they propose takes into account both exogenous as well as endogenous factors as being the source of institutional change. They went on to state a view that transformation change as being a result of abrupt, wholesale breakdown needs to be rethought to include incremental, endogenous shifts in thinking that can often result in fundamental transformations.展开更多
With artificial intelligence(AI)systems now able to match the diagnostic abilities of seasoned doctors for certain ailments,and even suggest treatment options that no one had thought of,it is clear that AI and data sc...With artificial intelligence(AI)systems now able to match the diagnostic abilities of seasoned doctors for certain ailments,and even suggest treatment options that no one had thought of,it is clear that AI and data science have the potential to transform aspects of healthcare for the better[1,2].Move beyond medicine,however,and things quickly get murkier:All over the world,the growing adoption of AI and other transformative technologies is raising countless societal,industrial,ethical,and environmental challenges.展开更多
In the coming decades, agricultural systems will have to adapt to tremendous challenges. Behavioral models have important potential to better understand and steer changes toward sustainability brought about by this co...In the coming decades, agricultural systems will have to adapt to tremendous challenges. Behavioral models have important potential to better understand and steer changes toward sustainability brought about by this context. Relying on a literature review, we distinguish incremental changes (extensions of what is already done) and transformational changes, which involve the reorientation of a considerable amount of farming activities. Transformational changes are particularly important in the context of global change. Existing integrated modelling frameworks based on behavioral theories are suited for incremental changes, but remain limited for transformational changes. Qualitative studies provide important insights on two key aspects of transformational changes, learning and social relations, but they have not been explicitly oriented toward computer modelling yet. Based on this literature and three seminal decision-making approaches, we propose a description of transformational change processes in farm decision-making, as a first step toward an implementation in agent-based models.展开更多
This paper is a study on the compulsion of transformational leadership from the part of the principal of this era when the demography of the students are changing exponentially, when the globe is experiencing massive ...This paper is a study on the compulsion of transformational leadership from the part of the principal of this era when the demography of the students are changing exponentially, when the globe is experiencing massive changes in methods and techniques in educational process but the institutions remain the same as its ethics and operational strategies. The time is eloping when an educational head earns praises due to their prominence and performance in managerial functioning. But this paper tends to focus on several persisting challenges in these educational institutions like huge gap between teacher-student ratio, students’ increasing technological oriented learning, teachers’ lack of knowledge of multimedia class operation, girls’ little rate of enrolment in higher level of education, early marriage of school going girls and ensuring quality education to girls as per the demand of SDG 4 by 2030. This paper fosters the idea that a transformational head of the institution can be successful in this chase of challenges as he involves everyone to activities in order to reach goal. He works with the other members as a team member and thus a challenge of an institution turns to be liability to all.展开更多
COVID-19 has stopped much of the world in its tracks.The pandemic has created what many hope history will remember as the Great Pause.We have before us,however,a moment during which we can turn this great pause,and th...COVID-19 has stopped much of the world in its tracks.The pandemic has created what many hope history will remember as the Great Pause.We have before us,however,a moment during which we can turn this great pause,and the catastrophe that caused it,into an opportunity for a global re-set and the emergence of new hope for the future.展开更多
为解决风电机组故障诊断中故障样本不足而导致模型准确率不高的问题,将当下备受关注的数据增强方法-去噪扩散概率模型(denoising diffusion probability model,DDPM)引入到故障诊断领域以生成大量高质量的故障样本数据集。因此,结合Tran...为解决风电机组故障诊断中故障样本不足而导致模型准确率不高的问题,将当下备受关注的数据增强方法-去噪扩散概率模型(denoising diffusion probability model,DDPM)引入到故障诊断领域以生成大量高质量的故障样本数据集。因此,结合Transformer网络,提出了一种DDPM-Transformer风电机组故障样本生成方法。首先,将用于计算机视觉图像生成领域的DDPM模型应用于风电机组故障诊断领域中,通过前向加噪过程将数据逐渐转化为噪声,再通过逆向去噪过程将噪声逐步恢复为原始数据,实现从噪声中生成故障数据,解决数据不平衡问题;其次,通过对原始DDPM中使用的U-net模块进行改进,使用Transformer模型替换U-net网络,利用扩散后的数据和添加的噪声训练Transformer模型,实现噪声预测,以提高故障数据的生成质量;最后,使用多种生成模型评价指标对生成的故障数据进行评价,在监督控制和数据采集系统(supervisory control and data acquisition,SCADA)故障数据生成中论证改进DDPM-Transformer模型的性能。通过试验证明,所提DDPM-Transformer模型与现有的生成模型相比,最大均值异(maximum mean discrepancy,MMD)最大提升0.13,峰值信噪比(peak signal to noise ratio,PSNR)最大提升7.8。所提模型可以有效地生成质量更高的风电机组故障样本,从而基于该样本集辅助训练基于深度学习的故障诊断模型,可以使诊断模型具有更高精度和良好的稳定性。展开更多
文摘IPSAS was accepted by Jordan’s government in accordance with worldwide trends.The Jordanian Ministry of Finance launched cash-basis IPSAS in 2015 and planned to implement accrual accounting by January 1,2021.However,the commitment to change remains uneven,hindering the full shift.Moving from old accounting processes to new ones is tough.Even then,it hasn’t been implemented,creating a gap due to the difficulty in committing to new accounting standards throughout implementation due to obstacles.Thus,knowing government accountants’issues is essential to applying IPSAS in government accounting.This study examines how transformational leadership affects government accountants’commitment to IPSAS adoption in Jordan’s public sector.This study used a quantitative approach to survey Jordanian Ministry of Finance accountants.The 384-person study had a 78%response rate.Additionally,PLS-SEM was used to confirm variable relationships.Transformational leadership positively predicted IPSAS implementation,according to the study.
文摘Leadership is a complex process.It is one of the most researched areas around the world.It has gained importance in every walk of life from politics to business and from education to social organizations.According to the study of"Leadership in Adult Education Venues",here has a much more clear recognition of leadership:leadership is a process whereby an individual influences a group of individuals to achieve a common goal.There are many approaches of leadership throughout the study of this class,the three theories of leadership I choose to describe in this paper are:Leader-Member Exchange(LMX)Theory,Transformational Leadership,and Team Leadership.
文摘This paper examines the role of transformational leadership in transforming an organization into a knowledge based, then into learning organization so that it becomes an innovative company. Important features of the leader such and ability to assist in developing and accommodating the implementation of knowledge management programs, learning organization concepts and innovation protocols are discussed in this paper. This paper demonstrates that shifting the organization to become a knowledge based and then to be learning organization and finally to become innovative company could involve some unique attributes of a transformation leadership. In that regards, the paper also demonstrates that organizations need first to create, capture, transfer, and mobilize knowledge before it can be used for learning and then for innovation. The paper will present a method of a studying how successful innovation leaders of companies could found themselves acting in three roles namely： knowledge leader, learning leader and then innovation leader.
文摘Colorectal cancer liver metastases （CLM） treatment is very important given the high incidence of colorectal cancer with liver metastases, which are primarily treated by surgical resection. Transformational therapy such as systemic chemotherapy, hepatic arterial infusion （HAl）, portal vein embolization （PVE）, ablation therapy, and targeted therapy, should be applied to CLM patients who are unable to undergo immediate surgery to improve patients＇ survival and quality of life.
文摘The transformational journey archetype begins long before literature in rites of initiation when a child undergoes a journey full of tests and temptations, perilous encounters in an underworld, and visions that transform the child into a member of a tribe. Before this archetype is translated by the written word into literature, the telling of the story is not just the account of something that happened long ago in the past, but an actual reenactment of the events for the audience. The journey archetype appears in the earliest example of literature, Homer＇s Odyssey, where Homer makes the readers both an observer and participant in the transformation. The journey does not always, as in rites of initiation, involve a child and occur only once in life. Instead, the journey may begin in death and trauma and involve a person who must resume that journey over again as an adult. Such is the fate of Aeneas in Virgil＇s Aeneid whose transformative journey begins with the burning towers of Troy. In these two early epics the heroes suffer the loss of an older world and must resume their pursuit of new identities in a new world after descending to a land of death or underworld to consult ancestor figures who prepare them for the transition to a new life, identity, and destiny. The reader of these works participates in the journeys the heroes undertake and learns to renew contact with the sources of life and consciousness in myth, magic, and vision. Dante＇s journey through the Inferno to his vision of God in Paradiso is a culmination of this transformative experience and vision, whose intent is to transform us as well through imaginative and intellectual participation in the journey. In Jorge Luis Borges＇s parody of Dante in his story, ＂El Aleph＂, Borges goes beyond Dante in making the reader, not only a participant in the journey and vision, but a ＂writer＂ whom Borges evokes to transform the impossible vision of the Aleph into an illusion of reality. Unlike Dante＇s positive transformational vision of the universe as a harmonious cosmos embraced within the vision of God as if it were a book uniting its multiple pages in one binding, the vision of the Aleph confronts the protagonist and readers with a universe that is random and chaotic, a vision that is disillusioning rather than transformational.
文摘Teacher performance is an important factor to improve education performance. This study aimed to analyze the effect of the work ethics, transformational, and transactional leadership style on teacher performance. The experiment was conducted in public high school No. 112 Jakarta. A total of 50 teachers were included as samples, where they were given the questionnaires to be filled by self-rating. Data were analyzed with multiple linear regression model and processed with SPSS version 20. Results showed that transformational leadership, transactional leadership and work ethics have positive and significant impacts on teacher performance both simultaneously and individually.
文摘With rising costs of capital, labor and energy, cost efficiency and cost management have become important questions confronting the next stage of China＇s economic growth. By building a parametric cost frontier model using panel data, this paper investigates the drivers of economic growth transformation from a cost perspective. According to our research, among various effects triggering corporate cost variations and in addition to the expansion of production scale, the largest effect is from technological progress, followed by the effect of factor price adjustment and the effect of efficiency gains. Within the decomposition of factor price adjustment effect, the energy factor effect is the most significant. Furthermore, energy price fluctuations are likely to become major factors restricting saving-based growth. Further study reveals that both the ownership reform and opening up of SOEs are favorable to reducing the costs generated by inefficiency. This paper provides empirical evidence for the driving mechanism of saving-based growth transformation as well as empirical evidence to support to the further deepening of property rights and market-oriented reforms.
文摘This paper provides a different meaning on the role of the Pastor or Ministry Leader as a ＂servant leader＂ referencing the text--＂Pastor： The Theology and Practice of Ordained Ministry＂ by William H. Willimon （2002）, where the author describes the ordained ministry as ＂a is a gift of God to the church＂ which usually does not mean that it is an easy task but rather, more complex and challenging as ministry leaders or pastors feel a call to transforming societies beyond their calling. In post-modern society, the pastors＇ role has differed and extended to form in line with creating a just and beloved community. In such communities, the pastor has more interaction with the community and the day to day activities of its neighbors or hosts. The purpose of this paper is to understand leadership and the role of the Ministry leader as a transformational leader, that goes beyond the role of being a servant leader.
文摘This research was conducted to identify the emerging leadership style being practiced by successful entrepreneurs and the leadership behavior they frequently applied. Since, leadership style and behavior has a huge influence to the success of the entrepreneur＇s enterprise. One hundred and fifty （150） successful entrepreneurs was the respondent of this study and they were survey and interviewed about their actual leadership style and practices. The research design was qualitative-descriptive type of research with the use of the Multifactor Leadership Questionnaire 5X （MLQ 5X） as the survey instrument to collect data regarding leadership styles of successful entrepreneurs. An interview guide questions was likewise utilized for validating the result of the study. An in-depth semi-structured interview was also conducted to 30 entrepreneurs from the 150 respondents. Findings of the study revealed that a successful entrepreneur exhibits a noticeably higher inclination toward transformational leadership and they consistently rated themselves higher in inspirational motivation for their leadership behavior. Therefore, the emerging leadership style of successful entrepreneurs is the transformational leadership and the leadership behavior that they frequently use is the inspirational motivation. Furthermore, the aimed of this study is to explore practices of transformational leadership behavior of successful entrepreneurs from entrepreneur＇s perspective.
文摘Much has been written and researched about transformational change and the exogenous events that result in radical institutional transformation （Di Maggio ＆ Powell, 1983; Hannan＆ Freeman, 1989; Fligstein, 1996; Zorn, Dobbin, ＆ Kwok, 2006）. Accounts are provided of external agents disturbing the existing stasis of the institution and transforming the institution into something else that reflect a new paradigm or set of interests. Often, what is neglected in these accounts is what fractures exist in the original institution that would make them vulnerable and allow penetration by exogenous influences. Mahoney and Thelen （20 l 0） went beyond a general model of change that described the collapse of one set of institutional norms to be replaced by another. The model of change they propose takes into account both exogenous as well as endogenous factors as being the source of institutional change. They went on to state a view that transformation change as being a result of abrupt, wholesale breakdown needs to be rethought to include incremental, endogenous shifts in thinking that can often result in fundamental transformations.
文摘With artificial intelligence(AI)systems now able to match the diagnostic abilities of seasoned doctors for certain ailments,and even suggest treatment options that no one had thought of,it is clear that AI and data science have the potential to transform aspects of healthcare for the better[1,2].Move beyond medicine,however,and things quickly get murkier:All over the world,the growing adoption of AI and other transformative technologies is raising countless societal,industrial,ethical,and environmental challenges.
文摘In the coming decades, agricultural systems will have to adapt to tremendous challenges. Behavioral models have important potential to better understand and steer changes toward sustainability brought about by this context. Relying on a literature review, we distinguish incremental changes (extensions of what is already done) and transformational changes, which involve the reorientation of a considerable amount of farming activities. Transformational changes are particularly important in the context of global change. Existing integrated modelling frameworks based on behavioral theories are suited for incremental changes, but remain limited for transformational changes. Qualitative studies provide important insights on two key aspects of transformational changes, learning and social relations, but they have not been explicitly oriented toward computer modelling yet. Based on this literature and three seminal decision-making approaches, we propose a description of transformational change processes in farm decision-making, as a first step toward an implementation in agent-based models.
文摘This paper is a study on the compulsion of transformational leadership from the part of the principal of this era when the demography of the students are changing exponentially, when the globe is experiencing massive changes in methods and techniques in educational process but the institutions remain the same as its ethics and operational strategies. The time is eloping when an educational head earns praises due to their prominence and performance in managerial functioning. But this paper tends to focus on several persisting challenges in these educational institutions like huge gap between teacher-student ratio, students’ increasing technological oriented learning, teachers’ lack of knowledge of multimedia class operation, girls’ little rate of enrolment in higher level of education, early marriage of school going girls and ensuring quality education to girls as per the demand of SDG 4 by 2030. This paper fosters the idea that a transformational head of the institution can be successful in this chase of challenges as he involves everyone to activities in order to reach goal. He works with the other members as a team member and thus a challenge of an institution turns to be liability to all.
文摘COVID-19 has stopped much of the world in its tracks.The pandemic has created what many hope history will remember as the Great Pause.We have before us,however,a moment during which we can turn this great pause,and the catastrophe that caused it,into an opportunity for a global re-set and the emergence of new hope for the future.
文摘为解决风电机组故障诊断中故障样本不足而导致模型准确率不高的问题,将当下备受关注的数据增强方法-去噪扩散概率模型(denoising diffusion probability model,DDPM)引入到故障诊断领域以生成大量高质量的故障样本数据集。因此,结合Transformer网络,提出了一种DDPM-Transformer风电机组故障样本生成方法。首先,将用于计算机视觉图像生成领域的DDPM模型应用于风电机组故障诊断领域中,通过前向加噪过程将数据逐渐转化为噪声,再通过逆向去噪过程将噪声逐步恢复为原始数据,实现从噪声中生成故障数据,解决数据不平衡问题;其次,通过对原始DDPM中使用的U-net模块进行改进,使用Transformer模型替换U-net网络,利用扩散后的数据和添加的噪声训练Transformer模型,实现噪声预测,以提高故障数据的生成质量;最后,使用多种生成模型评价指标对生成的故障数据进行评价,在监督控制和数据采集系统(supervisory control and data acquisition,SCADA)故障数据生成中论证改进DDPM-Transformer模型的性能。通过试验证明,所提DDPM-Transformer模型与现有的生成模型相比,最大均值异(maximum mean discrepancy,MMD)最大提升0.13,峰值信噪比(peak signal to noise ratio,PSNR)最大提升7.8。所提模型可以有效地生成质量更高的风电机组故障样本,从而基于该样本集辅助训练基于深度学习的故障诊断模型,可以使诊断模型具有更高精度和良好的稳定性。
