In Taiwan’s history, rice and sugarcane," the two main e-conomical foundation stones" of Taiwan, were well knownin the world. Taiwan was one of the main rice-productionareas in China, which had always been ...In Taiwan’s history, rice and sugarcane," the two main e-conomical foundation stones" of Taiwan, were well knownin the world. Taiwan was one of the main rice-productionareas in China, which had always been called "rice ware-house". In this article, the author would do a preliminaryresearch on the primitive rice cultivation pattern from im-memorial time to the earlier stage of Qing Dynasty ( 1616 -展开更多
Purpose-The design goal for the tracking interval of high-speed railway trains in China is 3 min,but it is difficult to achieve,and it is widely believed that it is mainly limited by the tracking interval of train arr...Purpose-The design goal for the tracking interval of high-speed railway trains in China is 3 min,but it is difficult to achieve,and it is widely believed that it is mainly limited by the tracking interval of train arrivals.If the train arrival tracking interval can be compressed,it will be beneficial for China's high-speed railway to achieve a 3-min train tracking interval.The goal of this article is to study how to compress the train arrival tracking interval.Design/methodologylapproach-By simulating the process of dense train groups arriving at the station and stopping,the headway between train arrivals at the station was calculated,and the pattern of train arrival headway was obtained,changing the traditional understanding that the train arrival headway is considered the main factor limiting the headway of trains.Findings-When the running speed of trains is high,the headway between trains is short,the length of the station approach throat area is considerable and frequent train arrivals at the station,the arrival headway for the first group or several groups of trains will exceed the headway,but the subsequent sets of trains will havea headway equal to the arrival headway.This convergence characteristic is obtained by appropriately increasing the running time.Originality/value-According to this pattern,there is no need to overly emphasize the impact of train arrival headway on the headway.This plays an important role in compressing train headway and improving high-speedrailwaycapacity.展开更多
Water quality system informatics(WQSI)is an emerging field that employs cybernetics to collect and digitize data associated with water quality.It involves monitoring the physical,chemical,and biological processes that...Water quality system informatics(WQSI)is an emerging field that employs cybernetics to collect and digitize data associated with water quality.It involves monitoring the physical,chemical,and biological processes that affect water quality and the ecological impacts and interconnections within water quality systems.WQSI integrates theories and methods from water quality engineering,information engineering,and system control theory,enabling the intelligent management and control of water quality.This integration revolutionizes the understanding and management of water quality systems with greater precision and higher resolution.WQSI is a new stage of development in environmental engineering that is driven by the digital age.This work explores the fundamental concepts,research topics,and methods of WQSI and its features and potential to promote disciplinary development.The innovation and development of WQSI are crucial for driving the digital and intelligent transformation of national industry patterns in China,positioning China at the forefront of environmental engineering and ecological environment research on a global scale.展开更多
文摘In Taiwan’s history, rice and sugarcane," the two main e-conomical foundation stones" of Taiwan, were well knownin the world. Taiwan was one of the main rice-productionareas in China, which had always been called "rice ware-house". In this article, the author would do a preliminaryresearch on the primitive rice cultivation pattern from im-memorial time to the earlier stage of Qing Dynasty ( 1616 -
基金State Railway Corporation of China Limited under the Science and Technology Research and Development Programme(2021X007)China Academy of Railway Research(2021YJ012)+1 种基金National Natural Science Foundation of China(52302417)Natural Science Foundation of Sichuan Province of China(2023NSFSC0906).
文摘Purpose-The design goal for the tracking interval of high-speed railway trains in China is 3 min,but it is difficult to achieve,and it is widely believed that it is mainly limited by the tracking interval of train arrivals.If the train arrival tracking interval can be compressed,it will be beneficial for China's high-speed railway to achieve a 3-min train tracking interval.The goal of this article is to study how to compress the train arrival tracking interval.Design/methodologylapproach-By simulating the process of dense train groups arriving at the station and stopping,the headway between train arrivals at the station was calculated,and the pattern of train arrival headway was obtained,changing the traditional understanding that the train arrival headway is considered the main factor limiting the headway of trains.Findings-When the running speed of trains is high,the headway between trains is short,the length of the station approach throat area is considerable and frequent train arrivals at the station,the arrival headway for the first group or several groups of trains will exceed the headway,but the subsequent sets of trains will havea headway equal to the arrival headway.This convergence characteristic is obtained by appropriately increasing the running time.Originality/value-According to this pattern,there is no need to overly emphasize the impact of train arrival headway on the headway.This plays an important role in compressing train headway and improving high-speedrailwaycapacity.
基金the support provided by the National Natural Science Foundation of China(52327813,52131003,and 52370058)the Outstanding Scientist of Chongqing Talent Plan(CQYC20210101288 and CQYC202101006)。
文摘Water quality system informatics(WQSI)is an emerging field that employs cybernetics to collect and digitize data associated with water quality.It involves monitoring the physical,chemical,and biological processes that affect water quality and the ecological impacts and interconnections within water quality systems.WQSI integrates theories and methods from water quality engineering,information engineering,and system control theory,enabling the intelligent management and control of water quality.This integration revolutionizes the understanding and management of water quality systems with greater precision and higher resolution.WQSI is a new stage of development in environmental engineering that is driven by the digital age.This work explores the fundamental concepts,research topics,and methods of WQSI and its features and potential to promote disciplinary development.The innovation and development of WQSI are crucial for driving the digital and intelligent transformation of national industry patterns in China,positioning China at the forefront of environmental engineering and ecological environment research on a global scale.
