This article introduces the basic situation of Yanziqian Tobacco Farmers' Mutual Assistance and Cooperation Association in Jiamachi Town of Xianfeng County.It analyzes the operating mode of tobacco farmers' mu...This article introduces the basic situation of Yanziqian Tobacco Farmers' Mutual Assistance and Cooperation Association in Jiamachi Town of Xianfeng County.It analyzes the operating mode of tobacco farmers' mutual assistance and cooperation association,and conducts a comparative analysis of tobacco farmers' costs and benefits before and after participating in mutual assistance and cooperation.Studies show that the mode of tobacco farmers' mutual assistance and cooperation,is conducive to reducing labor in curing link,promoting the quality of tobacco,increasing tobacco farmers' income,which is worthy of promotion.展开更多
On October 24,2016,Afrobaromete published a survey report,revealing how Africans feel about the growing influence of China in the African continent.More than56 percent of respondents believe that the development assis...On October 24,2016,Afrobaromete published a survey report,revealing how Africans feel about the growing influence of China in the African continent.More than56 percent of respondents believe that the development assistance from China contributes'some'or'a lot'in meeting their countries’needs.Though there is a long distance between them,China and Africa have great potential for cooperation,展开更多
The China Aerospace Corp. (CASC) is seeking co-operation in 93 projects covering satellites, electronics, machinery, automobile and real estate development. Implementing all of them will require 1.28 billion yuan ($14...The China Aerospace Corp. (CASC) is seeking co-operation in 93 projects covering satellites, electronics, machinery, automobile and real estate development. Implementing all of them will require 1.28 billion yuan ($147 million). It is willing to cooperate with any foreign partner and would explore all forms of assistance in developing the space industry, including joint ventures and technological exchanges. The corporation will stage four international exhibitions this year to publicize展开更多
Introducing multi-UAV network with flexible deployment into mobile edge computing(MEC)can effectively improve the quality of service of Internet-of-Things services,reduce the coverage cost and resource waste rate of e...Introducing multi-UAV network with flexible deployment into mobile edge computing(MEC)can effectively improve the quality of service of Internet-of-Things services,reduce the coverage cost and resource waste rate of edge nodes,and also bring some challenges.This paper first introduces the current situation and pain points of mobile edge computing,then analyzes the significance and value of using multi-UAV network to assist mobile edge computing,and summarizes its key technologies and typical applications.In the end,some open research problems and technology prospects of multi-UAV network assisted intelligent edge computing are put forward,which provide new ideas for the future development of this field.展开更多
To accurately assess the performance of cooperative multiple packet reception （MPR） based on network-assisted diversity multiple access （NDMA）, non-ideal collision detection is introduced in ALLIANCES （ALLow impr...To accurately assess the performance of cooperative multiple packet reception （MPR） based on network-assisted diversity multiple access （NDMA）, non-ideal collision detection is introduced in ALLIANCES （ALLow improved access in the network via cooperation and energy savings）. To provide a unified anatysis frame- work, the length of cooperative transmission epoch is fixed to the detected collision order. The mathematical analysis of potential throughput （PTP） and potential packet loss rate （PPLR） are given under a pessimistic assumption and an optimistic assumption. According to the analysis of PTP and PPLR, threshold selection is done to optimize system performances, e.g. the optimal threshold should guarantee PTP to be maximum or guarantee PPLR to be minimum. In simulations, the thresholds are selected according to PTP under the pessimistic assumption. Simulation results show that the proposed cooperative MPR scheme can achieve higher throughput than NDMA and slotted ALOHA schemes.展开更多
文摘This article introduces the basic situation of Yanziqian Tobacco Farmers' Mutual Assistance and Cooperation Association in Jiamachi Town of Xianfeng County.It analyzes the operating mode of tobacco farmers' mutual assistance and cooperation association,and conducts a comparative analysis of tobacco farmers' costs and benefits before and after participating in mutual assistance and cooperation.Studies show that the mode of tobacco farmers' mutual assistance and cooperation,is conducive to reducing labor in curing link,promoting the quality of tobacco,increasing tobacco farmers' income,which is worthy of promotion.
文摘On October 24,2016,Afrobaromete published a survey report,revealing how Africans feel about the growing influence of China in the African continent.More than56 percent of respondents believe that the development assistance from China contributes'some'or'a lot'in meeting their countries’needs.Though there is a long distance between them,China and Africa have great potential for cooperation,
文摘The China Aerospace Corp. (CASC) is seeking co-operation in 93 projects covering satellites, electronics, machinery, automobile and real estate development. Implementing all of them will require 1.28 billion yuan ($147 million). It is willing to cooperate with any foreign partner and would explore all forms of assistance in developing the space industry, including joint ventures and technological exchanges. The corporation will stage four international exhibitions this year to publicize
基金supported by the National Natural Science Foundation of China(NSFC)with Grant 61720106001。
文摘Introducing multi-UAV network with flexible deployment into mobile edge computing(MEC)can effectively improve the quality of service of Internet-of-Things services,reduce the coverage cost and resource waste rate of edge nodes,and also bring some challenges.This paper first introduces the current situation and pain points of mobile edge computing,then analyzes the significance and value of using multi-UAV network to assist mobile edge computing,and summarizes its key technologies and typical applications.In the end,some open research problems and technology prospects of multi-UAV network assisted intelligent edge computing are put forward,which provide new ideas for the future development of this field.
基金supported by the National Natural Science Foundation of China(60972039)the National High-Tech Research and Development Program of China(2009AA01Z241)+2 种基金the Key Grant and Basic Research Programs of Natural Science Fund for Higher Education of Jiangsu Province(06KJA51001)the Project Key Grant Research Programs of Natural Science Fund of Science and Technology Department of Jiangsu Province(BK2007729)the Natural Science Fund for Higher Education of Jiangsu Province(09KJB510012).
文摘To accurately assess the performance of cooperative multiple packet reception （MPR） based on network-assisted diversity multiple access （NDMA）, non-ideal collision detection is introduced in ALLIANCES （ALLow improved access in the network via cooperation and energy savings）. To provide a unified anatysis frame- work, the length of cooperative transmission epoch is fixed to the detected collision order. The mathematical analysis of potential throughput （PTP） and potential packet loss rate （PPLR） are given under a pessimistic assumption and an optimistic assumption. According to the analysis of PTP and PPLR, threshold selection is done to optimize system performances, e.g. the optimal threshold should guarantee PTP to be maximum or guarantee PPLR to be minimum. In simulations, the thresholds are selected according to PTP under the pessimistic assumption. Simulation results show that the proposed cooperative MPR scheme can achieve higher throughput than NDMA and slotted ALOHA schemes.
