In the wireless sensor networks(WSN),the sensor nodes have limited battery life and are deployed in hostile environments.It is very difficult to recharging or replacement of the batteries after deployment for the sens...In the wireless sensor networks(WSN),the sensor nodes have limited battery life and are deployed in hostile environments.It is very difficult to recharging or replacement of the batteries after deployment for the sensor nodes in inaccessible areas.Therefore,how to increase the network lifetime of the WSN is deserved to be studied.In this study,a WSN routing algorithm was proposed based on block clustering and springboard nodes to increase the network lifetime of the WSN.Firstly,by analyzing the influence of communication transmission distance on network energy consumption,block clustering was introduced to control node transmission distance in order to reduce total network energy consumption.In addition,a network transmission model was proposed based on springboard nodes and the advantages of network energy consumption of this model against multi-hop between clusters were analyzed.The simulation results show that,compared with the LEACH algorithm,EECPK-means algorithm and energy centroid clustering algorithm,the proposed routing algorithm effectively prolongs the network lifetime of WSN.展开更多
The two houses of Japan’s Diet (Parliament) provided the legal prop for theNew Japan-US Defense Guidelines by passing three related acts recently,thus eventually hammering out the reinforced overall framework for the...The two houses of Japan’s Diet (Parliament) provided the legal prop for theNew Japan-US Defense Guidelines by passing three related acts recently,thus eventually hammering out the reinforced overall framework for the bilateralcross-century security project, after an elapse of three years. Introduction of thenew guidelines, the basis for Tokyo’s 21 century-oriented diplomatic/securitystrategy, coupled with their related acts, will exert a significant impact onJapan’s future direction, the Asia-Pacific strategic configuration and the securityinterests of its neighboring nations. It will also spark troubles all around. Yet展开更多
Juggling People on the Springboard by Shenzhen Fuyong Acrobatic Troupe won the gold medal on the 5th National Youth Acrobatic Contest. As a young private-owned acrobatic troupe founded in 2001, it is the second time f...Juggling People on the Springboard by Shenzhen Fuyong Acrobatic Troupe won the gold medal on the 5th National Youth Acrobatic Contest. As a young private-owned acrobatic troupe founded in 2001, it is the second time for it to win the gold medal on the National Youth Acrobatic Contest. However, it is展开更多
Four years ago,Guo Jingjing, the young diving queen could have retired at the prime of her career.She had nothing left to prove.Back then,she was already a legendary athlete.She had competed in three Olympics,pocketin...Four years ago,Guo Jingjing, the young diving queen could have retired at the prime of her career.She had nothing left to prove.Back then,she was already a legendary athlete.She had competed in three Olympics,pocketing two展开更多
基金National Natural Science Foundation of China(Nos.61661025,61661026)。
文摘In the wireless sensor networks(WSN),the sensor nodes have limited battery life and are deployed in hostile environments.It is very difficult to recharging or replacement of the batteries after deployment for the sensor nodes in inaccessible areas.Therefore,how to increase the network lifetime of the WSN is deserved to be studied.In this study,a WSN routing algorithm was proposed based on block clustering and springboard nodes to increase the network lifetime of the WSN.Firstly,by analyzing the influence of communication transmission distance on network energy consumption,block clustering was introduced to control node transmission distance in order to reduce total network energy consumption.In addition,a network transmission model was proposed based on springboard nodes and the advantages of network energy consumption of this model against multi-hop between clusters were analyzed.The simulation results show that,compared with the LEACH algorithm,EECPK-means algorithm and energy centroid clustering algorithm,the proposed routing algorithm effectively prolongs the network lifetime of WSN.
文摘The two houses of Japan’s Diet (Parliament) provided the legal prop for theNew Japan-US Defense Guidelines by passing three related acts recently,thus eventually hammering out the reinforced overall framework for the bilateralcross-century security project, after an elapse of three years. Introduction of thenew guidelines, the basis for Tokyo’s 21 century-oriented diplomatic/securitystrategy, coupled with their related acts, will exert a significant impact onJapan’s future direction, the Asia-Pacific strategic configuration and the securityinterests of its neighboring nations. It will also spark troubles all around. Yet
文摘Juggling People on the Springboard by Shenzhen Fuyong Acrobatic Troupe won the gold medal on the 5th National Youth Acrobatic Contest. As a young private-owned acrobatic troupe founded in 2001, it is the second time for it to win the gold medal on the National Youth Acrobatic Contest. However, it is
文摘Four years ago,Guo Jingjing, the young diving queen could have retired at the prime of her career.She had nothing left to prove.Back then,she was already a legendary athlete.She had competed in three Olympics,pocketing two
