1.Chong Xu:It is my great honour to have this opportunity to interview you.You were trained as a geographer at the University of Nottingham in the UK.Can you talk to us about why you have chosen urban studies as your ...1.Chong Xu:It is my great honour to have this opportunity to interview you.You were trained as a geographer at the University of Nottingham in the UK.Can you talk to us about why you have chosen urban studies as your main research area?展开更多
In mapping out China’s future development,policymakers must bear in mind the challenges from a falling birthrate and aging society.Based on previous demographic censuses and original data of large sample surveys,this...In mapping out China’s future development,policymakers must bear in mind the challenges from a falling birthrate and aging society.Based on previous demographic censuses and original data of large sample surveys,this study employed an indirect method for estimating China’s total fertility rate(TFR)and a demographic forecast method based on the parity progression ratio(PPR).Our analysis details the socioeconomic implications behind demographic change,and we have proposed public policy countermeasures.The findings include:(i)China’s ultra-low fertility rate over the past three decades has led to an increasingly aging society,and China’s future fertility rate is likely to continue to decrease.(ii)Around 2024,China’s total population is expected to peak at 1.407 billion,followed by chronic negative population growth at an accelerating pace.By 2050,China’s newborn population will shrink to 8.73 million and the aging population will increase to roughly 30%of the total population resulting in the total dependency ratio above 50%.(iii)With a falling birthrate and aging society,China will face unprecedented challenges with respect to education,employment,and pension.(iv)As a public policy response,China should remove birth control altogether.If the fertility rate continues to stall,policymakers should consider issuing policies to encourage birth and create a birth-friendly society for all birth cycles.展开更多
Nowadays global navigation satellite system(GNSS)receivers are the primary tool not only for precision surveying but also for geodesy,geophysics and many other industrial applications worldwide.The only way to assure ...Nowadays global navigation satellite system(GNSS)receivers are the primary tool not only for precision surveying but also for geodesy,geophysics and many other industrial applications worldwide.The only way to assure the accuracy,universality and longevity of GNSS measurements is by calibration of its receivers.The parameters affecting the calibration accuracy of a single GNSS receiver are discussed in this paper.And a geodetic basepoint is established according to previous empirical studies to serve as a reference for calibration.Additionally,the traceability to the systeme international(SI)unit of such kind of calibrations is discussed.Stability of the base point is also verified through long-term measurements over three years.Eventually,a calibration of a sample single GNSS receiver is performed and the uncertainty budget is derived.展开更多
After the founding of the People’s Republic of China, the Chinese people have been struggling against poverty amid national development under the leadership of the Communist Party of China(CPC). Since reform and open...After the founding of the People’s Republic of China, the Chinese people have been struggling against poverty amid national development under the leadership of the Communist Party of China(CPC). Since reform and opening up, in particular, China has planned for and organized development-oriented poverty reduction practices on a broad scale with remarkable achievements and blazed a new path of development-oriented poverty reduction with Chinese characteristics. This path is both an essential component of Chinese socialism and a result of the CPC’s ideological improvement on poverty reduction. Since the 18 th CPC National Congress in 2012, the whole Party, country, and society have been called upon to fight the battle against poverty on a full-scale under the guidance of General Secretary Xi Jinping’s important statements on poverty reduction, unveiling a new stage for China’s development-oriented poverty reduction in the new era. China’s unprecedented poverty reduction achievements have enriched the path of poverty reduction with Chinese characteristics. Xi Jinping’s insightful and coherent statements on poverty reduction represent the latest results of Marxist anti-poverty theories and comprise an essential part of Xi Jinping Thought on Socialism with Chinese Characteristics for the New Era. His guidelines are the basis for the brilliant achievements of China’s poverty reduction endeavors, and will contribute Chinese experience and wisdom to global poverty governance.展开更多
文摘1.Chong Xu:It is my great honour to have this opportunity to interview you.You were trained as a geographer at the University of Nottingham in the UK.Can you talk to us about why you have chosen urban studies as your main research area?
文摘In mapping out China’s future development,policymakers must bear in mind the challenges from a falling birthrate and aging society.Based on previous demographic censuses and original data of large sample surveys,this study employed an indirect method for estimating China’s total fertility rate(TFR)and a demographic forecast method based on the parity progression ratio(PPR).Our analysis details the socioeconomic implications behind demographic change,and we have proposed public policy countermeasures.The findings include:(i)China’s ultra-low fertility rate over the past three decades has led to an increasingly aging society,and China’s future fertility rate is likely to continue to decrease.(ii)Around 2024,China’s total population is expected to peak at 1.407 billion,followed by chronic negative population growth at an accelerating pace.By 2050,China’s newborn population will shrink to 8.73 million and the aging population will increase to roughly 30%of the total population resulting in the total dependency ratio above 50%.(iii)With a falling birthrate and aging society,China will face unprecedented challenges with respect to education,employment,and pension.(iv)As a public policy response,China should remove birth control altogether.If the fertility rate continues to stall,policymakers should consider issuing policies to encourage birth and create a birth-friendly society for all birth cycles.
文摘Nowadays global navigation satellite system(GNSS)receivers are the primary tool not only for precision surveying but also for geodesy,geophysics and many other industrial applications worldwide.The only way to assure the accuracy,universality and longevity of GNSS measurements is by calibration of its receivers.The parameters affecting the calibration accuracy of a single GNSS receiver are discussed in this paper.And a geodetic basepoint is established according to previous empirical studies to serve as a reference for calibration.Additionally,the traceability to the systeme international(SI)unit of such kind of calibrations is discussed.Stability of the base point is also verified through long-term measurements over three years.Eventually,a calibration of a sample single GNSS receiver is performed and the uncertainty budget is derived.
文摘After the founding of the People’s Republic of China, the Chinese people have been struggling against poverty amid national development under the leadership of the Communist Party of China(CPC). Since reform and opening up, in particular, China has planned for and organized development-oriented poverty reduction practices on a broad scale with remarkable achievements and blazed a new path of development-oriented poverty reduction with Chinese characteristics. This path is both an essential component of Chinese socialism and a result of the CPC’s ideological improvement on poverty reduction. Since the 18 th CPC National Congress in 2012, the whole Party, country, and society have been called upon to fight the battle against poverty on a full-scale under the guidance of General Secretary Xi Jinping’s important statements on poverty reduction, unveiling a new stage for China’s development-oriented poverty reduction in the new era. China’s unprecedented poverty reduction achievements have enriched the path of poverty reduction with Chinese characteristics. Xi Jinping’s insightful and coherent statements on poverty reduction represent the latest results of Marxist anti-poverty theories and comprise an essential part of Xi Jinping Thought on Socialism with Chinese Characteristics for the New Era. His guidelines are the basis for the brilliant achievements of China’s poverty reduction endeavors, and will contribute Chinese experience and wisdom to global poverty governance.
