Climate engineering is a potential alternative method to curb global warming, and this discipline has garnered considerable attention from the intemational scientific community including the Chinese scientists. This m...Climate engineering is a potential alternative method to curb global warming, and this discipline has garnered considerable attention from the intemational scientific community including the Chinese scientists. This manuscript provides an overview of several aspects of climate engi- neering, including its definition, its potential impacts and risk, and its governance status. The overall conclusion is that China is not yet ready to implement climate engineering. However, it is important for China to continue conducting research on climate engineering, particularly with respect to its feasible application within China, its potential social, economic, and environmental impacts, and possible international governance structures and governing principles, with regard to both experimentatio~ and implementation.展开更多
China Launches Space Junk Monitoring Center China,on June 8,launched a space junk monitoring center to protect its spacecraft in orbit.The center,which is managed by the State Administration of Science,Technology and ...China Launches Space Junk Monitoring Center China,on June 8,launched a space junk monitoring center to protect its spacecraft in orbit.The center,which is managed by the State Administration of Science,Technology and Industry for National Defense（SASTIND）and the Chinese Academy of Sciences（CAS）,will track and monitor nearearth objects and space debris.展开更多
The process of decision making and risk analysis are essential tasks along the construction project cycle. Over the years, construction practitioners and researchers have used various methods, tools and techniques to ...The process of decision making and risk analysis are essential tasks along the construction project cycle. Over the years, construction practitioners and researchers have used various methods, tools and techniques to evaluate risk and assist in making more concise decisions. Most practitioners, however, rely on their expert judgment, past experience, intuition, acquired and accumulated knowledge and gut feelings to make decisions. Aleatory （natural, heterogeneity and stochasticity） and epistemic （subjective, ignorance） are the two major types of uncertainties observed in natural sciences. Practitioners traditionally deal with aleatory uncertainty through probabilistic analysis based on historical data （frequentist approach）; and epistemic uncertainty, on the other hand, handled through the Bayesian approach which has limitations since it requires a priori assumption. This paper reports the application of the DST （Dempster Shafer Theory） of evidence to determine the most critical risk factors affecting project cost contingencies using their epistemic probabilities of occurrence. The paper further discuses how these factors can be managed to enhance successful delivery of infrastructural projects. It uses the mixed methodology, with data gathered through structured questionnaires distributed to construction clients, contractors, professionals and experts in the built environment. The research revealed that design risk, financial risk and economic risk were most important cost risk categorizations. In particular, scope changes, incomplete scope definition, incomplete design, changes in specification, micro and macroeconomic indicators and delayed payment problems were identified as the most important risk factors to be considered during the cost contingency estimation process, hence successful delivery of infrastructural projects. The paper concludes by recommending modalities for managing the contingency evolution process of risk estimation to enhance successful delivery and management of infrastructural projects.展开更多
Zhao Cui-ying, researcher, female, born in 1940, doctoral supervisor, is an instructor at the research studio of Shanghai famous and senior Chinese medical practitioners＇ academic experience, used to enjoy the specia...Zhao Cui-ying, researcher, female, born in 1940, doctoral supervisor, is an instructor at the research studio of Shanghai famous and senior Chinese medical practitioners＇ academic experience, used to enjoy the special allowance of State Council. She graduated in 1964 from the Department of Medicine, Shanghai Second Medical University, and at the same year came to work in Shanghai Research Institute of Acupuncture and Meridian up to today, used to be a director of the Immunology Research Room of Shanghai Research Institute of Acupuncture and Meridian, and a consultant of Grade 3 Laboratory of Acupuncture Immunology of State Administration of Traditional Chinese Medicine, and is a vice chairwoman and deputy secretary general of Shanghai Professional Committee for the Respiratory Diseases of Integrated Chinese and Western Medicine. Zhao Cui-ying has been engaged in the clinical, research and teaching work in the field of immune-related diseases treated by acupuncture and moxibustion for over 40 years, with abundant and distinguished experience, has undertaken over 10 state and provincial subjects and offered many important viewpoints in the research of acupuncture treatment of immune-related diseases, and has obtained several scientific and technological achievements, and published totally 80 academic papers, and has been honored with 10 awards, including 6 provincial awards. As a tutor or instructor, she has trained 7 doctoral students and 16 master students.展开更多
基金supported by the National Basic Research Program of China (2015CB953603)
文摘Climate engineering is a potential alternative method to curb global warming, and this discipline has garnered considerable attention from the intemational scientific community including the Chinese scientists. This manuscript provides an overview of several aspects of climate engi- neering, including its definition, its potential impacts and risk, and its governance status. The overall conclusion is that China is not yet ready to implement climate engineering. However, it is important for China to continue conducting research on climate engineering, particularly with respect to its feasible application within China, its potential social, economic, and environmental impacts, and possible international governance structures and governing principles, with regard to both experimentatio~ and implementation.
文摘China Launches Space Junk Monitoring Center China,on June 8,launched a space junk monitoring center to protect its spacecraft in orbit.The center,which is managed by the State Administration of Science,Technology and Industry for National Defense（SASTIND）and the Chinese Academy of Sciences（CAS）,will track and monitor nearearth objects and space debris.
文摘The process of decision making and risk analysis are essential tasks along the construction project cycle. Over the years, construction practitioners and researchers have used various methods, tools and techniques to evaluate risk and assist in making more concise decisions. Most practitioners, however, rely on their expert judgment, past experience, intuition, acquired and accumulated knowledge and gut feelings to make decisions. Aleatory （natural, heterogeneity and stochasticity） and epistemic （subjective, ignorance） are the two major types of uncertainties observed in natural sciences. Practitioners traditionally deal with aleatory uncertainty through probabilistic analysis based on historical data （frequentist approach）; and epistemic uncertainty, on the other hand, handled through the Bayesian approach which has limitations since it requires a priori assumption. This paper reports the application of the DST （Dempster Shafer Theory） of evidence to determine the most critical risk factors affecting project cost contingencies using their epistemic probabilities of occurrence. The paper further discuses how these factors can be managed to enhance successful delivery of infrastructural projects. It uses the mixed methodology, with data gathered through structured questionnaires distributed to construction clients, contractors, professionals and experts in the built environment. The research revealed that design risk, financial risk and economic risk were most important cost risk categorizations. In particular, scope changes, incomplete scope definition, incomplete design, changes in specification, micro and macroeconomic indicators and delayed payment problems were identified as the most important risk factors to be considered during the cost contingency estimation process, hence successful delivery of infrastructural projects. The paper concludes by recommending modalities for managing the contingency evolution process of risk estimation to enhance successful delivery and management of infrastructural projects.
基金supported by Scientific Research Budget Project of Shanghai Municipal Education Commission (09jw55)Special Scientific Research Fund for Selection and Cultivation of Elite in College and University (szy10071)National Basic Research Program of China (973 Program, 2009CB522900)
文摘Zhao Cui-ying, researcher, female, born in 1940, doctoral supervisor, is an instructor at the research studio of Shanghai famous and senior Chinese medical practitioners＇ academic experience, used to enjoy the special allowance of State Council. She graduated in 1964 from the Department of Medicine, Shanghai Second Medical University, and at the same year came to work in Shanghai Research Institute of Acupuncture and Meridian up to today, used to be a director of the Immunology Research Room of Shanghai Research Institute of Acupuncture and Meridian, and a consultant of Grade 3 Laboratory of Acupuncture Immunology of State Administration of Traditional Chinese Medicine, and is a vice chairwoman and deputy secretary general of Shanghai Professional Committee for the Respiratory Diseases of Integrated Chinese and Western Medicine. Zhao Cui-ying has been engaged in the clinical, research and teaching work in the field of immune-related diseases treated by acupuncture and moxibustion for over 40 years, with abundant and distinguished experience, has undertaken over 10 state and provincial subjects and offered many important viewpoints in the research of acupuncture treatment of immune-related diseases, and has obtained several scientific and technological achievements, and published totally 80 academic papers, and has been honored with 10 awards, including 6 provincial awards. As a tutor or instructor, she has trained 7 doctoral students and 16 master students.
