Air traffic complexity is a critical indicator for air traffic operation,and plays an important role in air traffic management(ATM),such as airspace reconfiguration,air traffic flow management and allocation of air tr...Air traffic complexity is a critical indicator for air traffic operation,and plays an important role in air traffic management(ATM),such as airspace reconfiguration,air traffic flow management and allocation of air traffic controllers(ATCos).Recently,many machine learning techniques have been used to evaluate air traffic complexity by constructing a mapping from complexity related factors to air traffic complexity labels.However,the low quality of complexity labels,which is named as label noise,has often been neglected and caused unsatisfactory performance in air traffic complexity evaluation.This paper aims at label noise in air traffic complexity samples,and proposes a confident learning and XGBoost-based approach to evaluate air traffic complexity under label noise.The confident learning process is applied to filter out noisy samples with various label probability distributions,and XGBoost is used to train a robust and high-performance air traffic complexity evaluation model on the different label noise filtered ratio datasets.Experiments are carried out on a real dataset from the Guangzhou airspace sector in China,and the results prove that the appropriate label noise removal strategy and XGBoost algorithm can effectively mitigate the label noise problem and achieve better performance in air traffic complexity evaluation.展开更多
Customs statistics show the foreign tradevolume of eastern China’s Zhejiang Provincein 1998 amounted to US$14.85 billion,anannual increase of 4.3 percent.The exportswas US$10.8 billion,up 7.7 percent from1997;the imp...Customs statistics show the foreign tradevolume of eastern China’s Zhejiang Provincein 1998 amounted to US$14.85 billion,anannual increase of 4.3 percent.The exportswas US$10.8 billion,up 7.7 percent from1997;the imports ranked the fourth in thenation.This was hard won in the difficultiescaused by the Asian financial crisis.展开更多
On June 30th, 2009, the European Union Chamber of Commerce in China launches its sixth annual European Chamber Business Confidence Survey, which is published in partnership with Roland Berger Strategy Consultants.
China’s NPC and CPPCC sessions promote democracy in action and an economy that continues to drive global growth Disregar Ding the cold weather high up in the mountains of Xide County in southwest China’s Sichuan Pro...China’s NPC and CPPCC sessions promote democracy in action and an economy that continues to drive global growth Disregar Ding the cold weather high up in the mountains of Xide County in southwest China’s Sichuan Province,Pan Chengying trekked for half a day to reach展开更多
Following is a summary of an interview given by Zhao Qizheng, director-general of the State Council Information Office (SCIO), to mark the launching of this magazine. In the interview, Zhao elaborated on the current h...Following is a summary of an interview given by Zhao Qizheng, director-general of the State Council Information Office (SCIO), to mark the launching of this magazine. In the interview, Zhao elaborated on the current human rights conditions in China and their developments, why there are differences between the East and West regarding human rights, and China's stand on the issue.展开更多
The global success of video game Black Myth:Wukong and animation blockbuster Ne Zha:Demon Child Conquers the Sea,or Ne Zha 2,both based on ancient Chinese myths,provided new channels for international audiences to und...The global success of video game Black Myth:Wukong and animation blockbuster Ne Zha:Demon Child Conquers the Sea,or Ne Zha 2,both based on ancient Chinese myths,provided new channels for international audiences to understand and appreciate Chinese culture.Their success is also an encouragement for others to create Chinese intellectual property(IP)for international audiences.展开更多
Line transect sampling is a very useful method in survey of wildlife population. Confident interval estimation for density D of a biological population is proposed based on a sequential design. The survey area is occu...Line transect sampling is a very useful method in survey of wildlife population. Confident interval estimation for density D of a biological population is proposed based on a sequential design. The survey area is occupied by the population whose size is unknown. A stopping rule is proposed by a kernel-based estimator of density function of the perpendicular data at a distance. With this stopping rule, we construct several confidence intervals for D by difference procedures. Some bias reduction techniques are used to modify the confidence intervals. These intervals provide the desired coverage probability as the bandwidth in the stopping rule approaches zero. A simulation study is also given to illustrate the performance of this proposed sequential kernel procedure.展开更多
Dear Women of China,When I received your September(2025)issue,I was attracted by its cover,which represented the modern,professional and powerful role of women in today's China,specifically within the nation's...Dear Women of China,When I received your September(2025)issue,I was attracted by its cover,which represented the modern,professional and powerful role of women in today's China,specifically within the nation's defense.Their calm,resolute expressions conveyed strength,discipline and confidence.展开更多
Both the private sector and international financial institutions in the United States are optimistic about the Chinese economy, which is manifested in their actions and words.U.S. venture capitalists increased th eir ...Both the private sector and international financial institutions in the United States are optimistic about the Chinese economy, which is manifested in their actions and words.U.S. venture capitalists increased th eir investment in Chinese startups last year, with the venture capital(VC)f lows between the United States and China hitting an estimated $22 billion, according to a report released on May 8 by the U.S.-China Investment Project, led by the Rhodium Group and the National Committee on U.S.-China Relations(NCUSCR).展开更多
This study presents an analytic overview of forty years of study of Western Marxism by Chinese scholars.Organised into four main sections,it begins with an emphasis on the wider institutional context of this Chinese r...This study presents an analytic overview of forty years of study of Western Marxism by Chinese scholars.Organised into four main sections,it begins with an emphasis on the wider institutional context of this Chinese research.Here,I deal with the beginnings of research on Western Marxism in China and outline the two main periods of this research,which turn on the important educational reforms of 2005.The next section focuses on the initial period of research on Western Marxism,from the early 1980s to the education reforms,which may be characterised in terms of the work of“wary onlookers”writing introductions and surveys of Western Marxist scholars.The following section covers the last two decades after the 2005 education reforms.This period is of most interest,so more attention is devoted to developments during this time.It has been a time of increasingly confident participants on the world stage,who focus on core issues,realistic demands,and problem-based research.The final section concerns assessments of the limitations of Western Marxism,which have been identified through the in-depth research of the second period.In conclusion,while Western Marxism may be seen as a legitimate development of Marxism in a capitalist context,it is a tributary from the mainstream.展开更多
Before joining the Beijing Dragon Shadow Puppetry Art Theatre,this group of young people rarely had the chance to meet people like themselves,lacked friends,faced obstacles at work,and felt alienated from society.Now,...Before joining the Beijing Dragon Shadow Puppetry Art Theatre,this group of young people rarely had the chance to meet people like themselves,lacked friends,faced obstacles at work,and felt alienated from society.Now,they have gained appreciation,recognition,confidence,friendships,and love.展开更多
As the global economy navigates through a complex landscape of uncertainty and shifting dynamics,the Chinese economy stands out for its remarkable resilience,inherent vitality,and steadfast commitment to a transformat...As the global economy navigates through a complex landscape of uncertainty and shifting dynamics,the Chinese economy stands out for its remarkable resilience,inherent vitality,and steadfast commitment to a transformative,high-quality development path.The latest economic indicators,strategic policy guidance from the Central Economic Work Conference,and a surge in international confidence collectively present a picture of an economy not merely recovering,but actively building its new growth engines.China is transitioning towards a more sustainable and innovation-driven model,with new quality productive forces playing an increasingly prominent role.展开更多
The global financial crisis is far from over as world economic growth continues to decline. Can China stop the downward tendency of economic growth and reach an economic soft landing? Can China take the lead in gettin...The global financial crisis is far from over as world economic growth continues to decline. Can China stop the downward tendency of economic growth and reach an economic soft landing? Can China take the lead in getting out of the shadow of the economic crisis? Chen Huai, Director of the Economic Research Institute of China’s Urban and Rural Development under the Ministry of Housing and Urban-Rural Development, discussed these questions in a recent article in the Economic Information Daily. Edited excerpts follow:展开更多
The financial turmoil that originated in the United States is rapidly spreading throughout the world, and China’s economy has been inevita- bly affected. To avoid risks, some foreign-
China Standardization:What is your view on this year's International Standardization Youth Star Competition?Tom Heilandt:This is the first time I have attended this event,which was founded by my good friend Dr.Zha...China Standardization:What is your view on this year's International Standardization Youth Star Competition?Tom Heilandt:This is the first time I have attended this event,which was founded by my good friend Dr.Zhang Xiaogang,whom I first met in 2016 when he was President of ISO.It is an excellent initiative.I strongly believe that it is essential for young people to become involved in standardization.展开更多
Existing blockwise empirical likelihood(BEL)method blocks the observations or their analogues,which is proven useful under some dependent data settings.In this paper,we introduce a new BEL(NBEL)method by blocking the ...Existing blockwise empirical likelihood(BEL)method blocks the observations or their analogues,which is proven useful under some dependent data settings.In this paper,we introduce a new BEL(NBEL)method by blocking the scoring functions under high dimensional cases.We study the construction of confidence regions for the parameters in spatial autoregressive models with spatial autoregressive disturbances(SARAR models)with high dimension of parameters by using the NBEL method.It is shown that the NBEL ratio statistics are asymptoticallyχ^(2)-type distributed,which are used to obtain the NBEL based confidence regions for the parameters in SARAR models.A simulation study is conducted to compare the performances of the NBEL and the usual EL methods.展开更多
基金This work was supported by the Na⁃tional Natural Science Foundation of China(No.61903187)Nanjing University of Aeronautics and Astronautics Graduate Innovation Base(Laboratory)Open Fund(No.kfjj20190732)。
文摘Air traffic complexity is a critical indicator for air traffic operation,and plays an important role in air traffic management(ATM),such as airspace reconfiguration,air traffic flow management and allocation of air traffic controllers(ATCos).Recently,many machine learning techniques have been used to evaluate air traffic complexity by constructing a mapping from complexity related factors to air traffic complexity labels.However,the low quality of complexity labels,which is named as label noise,has often been neglected and caused unsatisfactory performance in air traffic complexity evaluation.This paper aims at label noise in air traffic complexity samples,and proposes a confident learning and XGBoost-based approach to evaluate air traffic complexity under label noise.The confident learning process is applied to filter out noisy samples with various label probability distributions,and XGBoost is used to train a robust and high-performance air traffic complexity evaluation model on the different label noise filtered ratio datasets.Experiments are carried out on a real dataset from the Guangzhou airspace sector in China,and the results prove that the appropriate label noise removal strategy and XGBoost algorithm can effectively mitigate the label noise problem and achieve better performance in air traffic complexity evaluation.
文摘Customs statistics show the foreign tradevolume of eastern China’s Zhejiang Provincein 1998 amounted to US$14.85 billion,anannual increase of 4.3 percent.The exportswas US$10.8 billion,up 7.7 percent from1997;the imports ranked the fourth in thenation.This was hard won in the difficultiescaused by the Asian financial crisis.
文摘On June 30th, 2009, the European Union Chamber of Commerce in China launches its sixth annual European Chamber Business Confidence Survey, which is published in partnership with Roland Berger Strategy Consultants.
文摘China’s NPC and CPPCC sessions promote democracy in action and an economy that continues to drive global growth Disregar Ding the cold weather high up in the mountains of Xide County in southwest China’s Sichuan Province,Pan Chengying trekked for half a day to reach
文摘Following is a summary of an interview given by Zhao Qizheng, director-general of the State Council Information Office (SCIO), to mark the launching of this magazine. In the interview, Zhao elaborated on the current human rights conditions in China and their developments, why there are differences between the East and West regarding human rights, and China's stand on the issue.
文摘The global success of video game Black Myth:Wukong and animation blockbuster Ne Zha:Demon Child Conquers the Sea,or Ne Zha 2,both based on ancient Chinese myths,provided new channels for international audiences to understand and appreciate Chinese culture.Their success is also an encouragement for others to create Chinese intellectual property(IP)for international audiences.
基金Supported by the National Natural Science Funds for Distinguished Young Scholar(No.70825004)the National Natural Science Foundation of China(No.10731010,10628104 and 10721101)Leading Academic Discipline Program,the 10th five year plan of 211 Project for Shanghai University of Finance and Economics and 211 Project for Shanghai University of Finance and Economics(the 3rd phase)
文摘Line transect sampling is a very useful method in survey of wildlife population. Confident interval estimation for density D of a biological population is proposed based on a sequential design. The survey area is occupied by the population whose size is unknown. A stopping rule is proposed by a kernel-based estimator of density function of the perpendicular data at a distance. With this stopping rule, we construct several confidence intervals for D by difference procedures. Some bias reduction techniques are used to modify the confidence intervals. These intervals provide the desired coverage probability as the bandwidth in the stopping rule approaches zero. A simulation study is also given to illustrate the performance of this proposed sequential kernel procedure.
文摘Dear Women of China,When I received your September(2025)issue,I was attracted by its cover,which represented the modern,professional and powerful role of women in today's China,specifically within the nation's defense.Their calm,resolute expressions conveyed strength,discipline and confidence.
文摘Both the private sector and international financial institutions in the United States are optimistic about the Chinese economy, which is manifested in their actions and words.U.S. venture capitalists increased th eir investment in Chinese startups last year, with the venture capital(VC)f lows between the United States and China hitting an estimated $22 billion, according to a report released on May 8 by the U.S.-China Investment Project, led by the Rhodium Group and the National Committee on U.S.-China Relations(NCUSCR).
文摘This study presents an analytic overview of forty years of study of Western Marxism by Chinese scholars.Organised into four main sections,it begins with an emphasis on the wider institutional context of this Chinese research.Here,I deal with the beginnings of research on Western Marxism in China and outline the two main periods of this research,which turn on the important educational reforms of 2005.The next section focuses on the initial period of research on Western Marxism,from the early 1980s to the education reforms,which may be characterised in terms of the work of“wary onlookers”writing introductions and surveys of Western Marxist scholars.The following section covers the last two decades after the 2005 education reforms.This period is of most interest,so more attention is devoted to developments during this time.It has been a time of increasingly confident participants on the world stage,who focus on core issues,realistic demands,and problem-based research.The final section concerns assessments of the limitations of Western Marxism,which have been identified through the in-depth research of the second period.In conclusion,while Western Marxism may be seen as a legitimate development of Marxism in a capitalist context,it is a tributary from the mainstream.
文摘Before joining the Beijing Dragon Shadow Puppetry Art Theatre,this group of young people rarely had the chance to meet people like themselves,lacked friends,faced obstacles at work,and felt alienated from society.Now,they have gained appreciation,recognition,confidence,friendships,and love.
文摘As the global economy navigates through a complex landscape of uncertainty and shifting dynamics,the Chinese economy stands out for its remarkable resilience,inherent vitality,and steadfast commitment to a transformative,high-quality development path.The latest economic indicators,strategic policy guidance from the Central Economic Work Conference,and a surge in international confidence collectively present a picture of an economy not merely recovering,but actively building its new growth engines.China is transitioning towards a more sustainable and innovation-driven model,with new quality productive forces playing an increasingly prominent role.
文摘The global financial crisis is far from over as world economic growth continues to decline. Can China stop the downward tendency of economic growth and reach an economic soft landing? Can China take the lead in getting out of the shadow of the economic crisis? Chen Huai, Director of the Economic Research Institute of China’s Urban and Rural Development under the Ministry of Housing and Urban-Rural Development, discussed these questions in a recent article in the Economic Information Daily. Edited excerpts follow:
文摘The financial turmoil that originated in the United States is rapidly spreading throughout the world, and China’s economy has been inevita- bly affected. To avoid risks, some foreign-
文摘China Standardization:What is your view on this year's International Standardization Youth Star Competition?Tom Heilandt:This is the first time I have attended this event,which was founded by my good friend Dr.Zhang Xiaogang,whom I first met in 2016 when he was President of ISO.It is an excellent initiative.I strongly believe that it is essential for young people to become involved in standardization.
基金Supported by the National Natural Science Foundation of China(12061017,12361055)the Research Fund of Guangxi Key Lab of Multi-source Information Mining&Security(22-A-01-01)。
文摘Existing blockwise empirical likelihood(BEL)method blocks the observations or their analogues,which is proven useful under some dependent data settings.In this paper,we introduce a new BEL(NBEL)method by blocking the scoring functions under high dimensional cases.We study the construction of confidence regions for the parameters in spatial autoregressive models with spatial autoregressive disturbances(SARAR models)with high dimension of parameters by using the NBEL method.It is shown that the NBEL ratio statistics are asymptoticallyχ^(2)-type distributed,which are used to obtain the NBEL based confidence regions for the parameters in SARAR models.A simulation study is conducted to compare the performances of the NBEL and the usual EL methods.
