The safety and the fatigue comfort were compared between a domestic and a Japanese postal bicycle. Firstly, the fatigue comfort of these two kinds of bicycles was evaluated by surface electromyographic signal (sEMG) e...The safety and the fatigue comfort were compared between a domestic and a Japanese postal bicycle. Firstly, the fatigue comfort of these two kinds of bicycles was evaluated by surface electromyographic signal (sEMG) experiment, in which human lower limb muscle groups were research objects, and the average EMG (AEMG) index and median frequency (MF) were chosen as the evaluation indexes. Secondly, the safety of these two kinds of bicycle frames was analyzed and compared by using the finite element analysis. The results show that the riding fatigue comfort of the Japanese postal bicycle is better, and the Japanese postal bicycle frame is more safe and reasonable although both the postal bicycles meet the requirement for strength. Finally, based on the above analysis, the frame structure and related parameters of the domestic postal bicycle were improved with reference to the Japanese postal bicycle and biomechanics theory.展开更多
With the advent of Internet life in recent years, online shopping has be- come a new way of life, shopping patterns emerge in an endless stream especially for college students. With the increasing of the express deliv...With the advent of Internet life in recent years, online shopping has be- come a new way of life, shopping patterns emerge in an endless stream especially for college students. With the increasing of the express delivery, express distribu- tionproblems are becoming more and more serious, ＂the last one hundred meters＂ restricts the long-term development of the campus express. Facing these problems, taking Universities in Tianjin as an example, this paper puts forward the distribution scheme of the intelligent terminal of the ＂postal island＂. The feasibility and necessity of the intelligent express management system are vedfied through analyzing the un- iversities in Tianiin.展开更多
In recent years,with the rapid development of cross-border e-commerce,international postal parcels have been increasing sharply,thus giving rise to a new way for alien biological invasion.According to the"animal ...In recent years,with the rapid development of cross-border e-commerce,international postal parcels have been increasing sharply,thus giving rise to a new way for alien biological invasion.According to the"animal and plant quarantine information platform"of the General Adminis-tration of Customs,postal inspection system intercepted a total of 4975 harmful organisms nationwide.There were 219 quarantine organisms,including 142 insects,27 weeds,12 nematodes,29 fungi,1 bacterium and 8 viruses.Insects accounted for 64.84%of the quarantine organisms,among which Hypothenemus hampei had the highest interception frequency.Up to 71.36%of those harmful organisms were from seedlings,yet47.31%organisms came from products exported from India.These analyses indicate the direction of future portal quarantine work and lay a theoret-ical foundation for better guarding the biological security.展开更多
With the development of e-commerce,the express delivery industry in China has developed rapidly.In the past,the express logistics service with postal service as the core has gradually developed into a competitive situ...With the development of e-commerce,the express delivery industry in China has developed rapidly.In the past,the express logistics service with postal service as the core has gradually developed into a competitive situation among many logistics companies,such as EMS,Shunfeng,and“Four Tong&One Da”(Shentong Express,Yuantong Express,Zhongtong Express,Best Express,Yunda Express).With the rapid development of China’s express industry,and the development of e-commerce,the number of online shopping has increased,express has become an important choice for small goods exchanges.As a new industry in China,express service industry greatly promotes the development of social economy.With the rapid development of express industry,China has surpassed the United States and become the largest express country in the world.The proportion of express industry in GDP has exceeded 1%,which is becoming one of the pillar industries in China.At the same time,the development of the industry is not standardized.Due to the difference of service standards and the lack of service quality,the number of consumer complaints is increasing.展开更多
基金Supported by Special Fund Project for Technology Innovation of Tianjin (No.10FDZDGX00500)Tianjin Product Quality Inspection Technology Research Institute
文摘The safety and the fatigue comfort were compared between a domestic and a Japanese postal bicycle. Firstly, the fatigue comfort of these two kinds of bicycles was evaluated by surface electromyographic signal (sEMG) experiment, in which human lower limb muscle groups were research objects, and the average EMG (AEMG) index and median frequency (MF) were chosen as the evaluation indexes. Secondly, the safety of these two kinds of bicycle frames was analyzed and compared by using the finite element analysis. The results show that the riding fatigue comfort of the Japanese postal bicycle is better, and the Japanese postal bicycle frame is more safe and reasonable although both the postal bicycles meet the requirement for strength. Finally, based on the above analysis, the frame structure and related parameters of the domestic postal bicycle were improved with reference to the Japanese postal bicycle and biomechanics theory.
基金Supported by Tianjin Agricultural University of National Grand Program in 2015(201510061020)~~
文摘With the advent of Internet life in recent years, online shopping has be- come a new way of life, shopping patterns emerge in an endless stream especially for college students. With the increasing of the express delivery, express distribu- tionproblems are becoming more and more serious, ＂the last one hundred meters＂ restricts the long-term development of the campus express. Facing these problems, taking Universities in Tianjin as an example, this paper puts forward the distribution scheme of the intelligent terminal of the ＂postal island＂. The feasibility and necessity of the intelligent express management system are vedfied through analyzing the un- iversities in Tianiin.
基金Supported by Public Welfare Project of Ningbo City(2019C10087)。
文摘In recent years,with the rapid development of cross-border e-commerce,international postal parcels have been increasing sharply,thus giving rise to a new way for alien biological invasion.According to the"animal and plant quarantine information platform"of the General Adminis-tration of Customs,postal inspection system intercepted a total of 4975 harmful organisms nationwide.There were 219 quarantine organisms,including 142 insects,27 weeds,12 nematodes,29 fungi,1 bacterium and 8 viruses.Insects accounted for 64.84%of the quarantine organisms,among which Hypothenemus hampei had the highest interception frequency.Up to 71.36%of those harmful organisms were from seedlings,yet47.31%organisms came from products exported from India.These analyses indicate the direction of future portal quarantine work and lay a theoret-ical foundation for better guarding the biological security.
文摘With the development of e-commerce,the express delivery industry in China has developed rapidly.In the past,the express logistics service with postal service as the core has gradually developed into a competitive situation among many logistics companies,such as EMS,Shunfeng,and“Four Tong&One Da”(Shentong Express,Yuantong Express,Zhongtong Express,Best Express,Yunda Express).With the rapid development of China’s express industry,and the development of e-commerce,the number of online shopping has increased,express has become an important choice for small goods exchanges.As a new industry in China,express service industry greatly promotes the development of social economy.With the rapid development of express industry,China has surpassed the United States and become the largest express country in the world.The proportion of express industry in GDP has exceeded 1%,which is becoming one of the pillar industries in China.At the same time,the development of the industry is not standardized.Due to the difference of service standards and the lack of service quality,the number of consumer complaints is increasing.
