Energy limitation of traditional Wireless Sensor Networks(WSNs)greatly confines the network lifetime due to generating and processing massive sensing data with a limited battery.The energy harvesting WSN is a novel ne...Energy limitation of traditional Wireless Sensor Networks(WSNs)greatly confines the network lifetime due to generating and processing massive sensing data with a limited battery.The energy harvesting WSN is a novel network architecture to address the limitation of traditional WSN.However,existing coverage and deployment schemes neglect the environmental correlation of sensor nodes and external energy with respect to physical space.Comprehensively considering the spatial correlation of the environment and the uneven distribution of energy in energy harvesting WSN,we investigate how to deploy a collection of sensor nodes to save the deployment cost while ensuring the target perpetual coverage.The Confident Information Coverage(CIC)model is adopted to formulate the CIC Minimum Deployment Cost Target Perpetual Coverage(CICMTP)problem to minimize the deployed sensor nodes.As the CICMTP is NP-hard,we devise two approximation algorithms named Local Greedy Threshold Algorithm based on CIC(LGTA-CIC)and Overall Greedy Search Algorithm based on CIC(OGSA-CIC).The LGTA-CIC has a low time complexity and the OGSA-CIC has a better approximation rate.Extensive simulation results demonstrate that the OGSA-CIC is able to achieve lower deployment cost and the performance of the proposed algorithms outperforms GRNP,TPNP and EENP algorithms.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
Drama as a new concept to be a teaching strategy has the power magic to improve students' language learning, it can create the students' imagination, it can develop the students' cooperation and creative a...Drama as a new concept to be a teaching strategy has the power magic to improve students' language learning, it can create the students' imagination, it can develop the students' cooperation and creative ability, it can show their empathize about others, it's a dramatic arts approach. The students are not only inside Drama, but also inside the language of Drama.展开更多
As a trait, leader confidence has been examined in major leadership theories, such as transformational/charismatic, Pygmalion, and empowering leadership. However, how confidence affects leadership effectiveness remain...As a trait, leader confidence has been examined in major leadership theories, such as transformational/charismatic, Pygmalion, and empowering leadership. However, how confidence affects leadership effectiveness remains an empirical question. Conceptualizing leadership confidence in two behavioral approaches-emonstrating self-confidence （DC-self） and demonstrating confidence in followers （DC-follower）--this study tests the independent effects of the two DC behaviors as well as their interactive effects with firm environment on followers＇ commitment. Results of Hierarchal Linear Modeling analyses suggest that both DC behaviors have significant impact on follower commitment and their effects attenuate each other. Results also reveal that DC-self interacts with firm environment to influence follower commitment. The effect of DC-self on follower commitment is stronger in a more competitive environment. Those findings and their implications for leadership research and practice are discussed.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
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
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
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
基金supported by National Natural Science Foundation of China(Grant No.61871209,No.62272182 and No.61901210)Shenzhen Science and Technology Program under Grant JCYJ20220530161004009+2 种基金Natural Science Foundation of Hubei Province(Grant No.2022CF011)Wuhan Business University Doctoral Fundamental Research Funds(Grant No.2021KB005)in part by Artificial Intelligence and Intelligent Transportation Joint Technical Center of HUST and Hubei Chutian Intelligent Transportation Co.,LTD under project Intelligent Tunnel Integrated Monitoring and Management System.
文摘Energy limitation of traditional Wireless Sensor Networks(WSNs)greatly confines the network lifetime due to generating and processing massive sensing data with a limited battery.The energy harvesting WSN is a novel network architecture to address the limitation of traditional WSN.However,existing coverage and deployment schemes neglect the environmental correlation of sensor nodes and external energy with respect to physical space.Comprehensively considering the spatial correlation of the environment and the uneven distribution of energy in energy harvesting WSN,we investigate how to deploy a collection of sensor nodes to save the deployment cost while ensuring the target perpetual coverage.The Confident Information Coverage(CIC)model is adopted to formulate the CIC Minimum Deployment Cost Target Perpetual Coverage(CICMTP)problem to minimize the deployed sensor nodes.As the CICMTP is NP-hard,we devise two approximation algorithms named Local Greedy Threshold Algorithm based on CIC(LGTA-CIC)and Overall Greedy Search Algorithm based on CIC(OGSA-CIC).The LGTA-CIC has a low time complexity and the OGSA-CIC has a better approximation rate.Extensive simulation results demonstrate that the OGSA-CIC is able to achieve lower deployment cost and the performance of the proposed algorithms outperforms GRNP,TPNP and EENP algorithms.
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Drama as a new concept to be a teaching strategy has the power magic to improve students' language learning, it can create the students' imagination, it can develop the students' cooperation and creative ability, it can show their empathize about others, it's a dramatic arts approach. The students are not only inside Drama, but also inside the language of Drama.
基金Acknowledgements We thank the Chinese University of Hong Kong （2070239/MR99/003/ 2070220） and the National Natural Science Foundation of China （71372160） for the grant that made this study possible. We thank Wei-ku Wu of Tsinghua University, Yong-gang Fu of Dalian Polytech University and Yong-kang Yang of Fudan University for helping collect the data.
文摘As a trait, leader confidence has been examined in major leadership theories, such as transformational/charismatic, Pygmalion, and empowering leadership. However, how confidence affects leadership effectiveness remains an empirical question. Conceptualizing leadership confidence in two behavioral approaches-emonstrating self-confidence （DC-self） and demonstrating confidence in followers （DC-follower）--this study tests the independent effects of the two DC behaviors as well as their interactive effects with firm environment on followers＇ commitment. Results of Hierarchal Linear Modeling analyses suggest that both DC behaviors have significant impact on follower commitment and their effects attenuate each other. Results also reveal that DC-self interacts with firm environment to influence follower commitment. The effect of DC-self on follower commitment is stronger in a more competitive environment. Those findings and their implications for leadership research and practice are discussed.
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.
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.
