Two new species of the genus Togoperla are described from Guangxi,China:T.caii sp.nov.and T.hippata sp.nov.Togoperla perpicta Klapálek,1921 and T.triangulata Du&Chou,1999 from the same region are diagnosed an...Two new species of the genus Togoperla are described from Guangxi,China:T.caii sp.nov.and T.hippata sp.nov.Togoperla perpicta Klapálek,1921 and T.triangulata Du&Chou,1999 from the same region are diagnosed and re-described.The taxonomic relationships are discussed with related congeners.展开更多
Coordinated Multi-point (CoMP) transmission technology is one of the key techniques in LTE-Advanced, Which can share the channel and data information in multiple cells, and optimize the whole system performance. In or...Coordinated Multi-point (CoMP) transmission technology is one of the key techniques in LTE-Advanced, Which can share the channel and data information in multiple cells, and optimize the whole system performance. In order to optimize the average sector throughput and improve the fairness of resource scheduling, a scheduling algorithm based on the resource is mainly investigated. In this algorithm, users in the network are classified firstly and then we combine the fixed resources division and flexible scheduling. System level simulation platform is set up to validate the algorithm and the results turn out that the average throughput is better compared with the traditional scheme.展开更多
With the rapid development of wireless communication industry, shortage situation of spectrum resource is increasingly significant. It has become an important topic to study cognitive radio spectrum allocation algorit...With the rapid development of wireless communication industry, shortage situation of spectrum resource is increasingly significant. It has become an important topic to study cognitive radio spectrum allocation algorithm that is of higher spectrum utilization ratio, less system power consumption and better algorithm efficiency. Analyzes spectrum allocation models based on genetic algorithm, and then puts forward new improved genetic algorithm. The algorithm adopts niche crowding operation to avoid individual inbreeding. It adaptively adjusts crossover and mutation probability to keep them always in the appropriate state. It provides more equal individual competition opportunity by hierarchical measures, which can effectively avert premature convergence to local optimal solution. It obviously improves the district's total transfer rate on the premise that it has met the requirements of minimum user transfer rate and limitations of maximum total power and maximum bit error rate. Simulation results prove the effectiveness of the proposed algorithm.展开更多
In this paper,two new species are described and illustrated from China:Flavoperla separata Liu,Li&Shali,sp.nov.from Hubei and Shaanxi Provinces and F.qinlinga Liu,Li&Li,sp.nov.from Shaanxi and Sichuan Province...In this paper,two new species are described and illustrated from China:Flavoperla separata Liu,Li&Shali,sp.nov.from Hubei and Shaanxi Provinces and F.qinlinga Liu,Li&Li,sp.nov.from Shaanxi and Sichuan Provinces,with the discussion of their congeners.All type specimens are deposited in the Entomological Museum of China Agricultural University(CAU)and the Henan Institute of Science and Technology(HIST).展开更多
基金partially supported by the National Natural Science Foundation of China(31970402)the GDAS Special Project of Science and Technology Development(2020GDASYL-20200102021)。
文摘Two new species of the genus Togoperla are described from Guangxi,China:T.caii sp.nov.and T.hippata sp.nov.Togoperla perpicta Klapálek,1921 and T.triangulata Du&Chou,1999 from the same region are diagnosed and re-described.The taxonomic relationships are discussed with related congeners.
文摘Coordinated Multi-point (CoMP) transmission technology is one of the key techniques in LTE-Advanced, Which can share the channel and data information in multiple cells, and optimize the whole system performance. In order to optimize the average sector throughput and improve the fairness of resource scheduling, a scheduling algorithm based on the resource is mainly investigated. In this algorithm, users in the network are classified firstly and then we combine the fixed resources division and flexible scheduling. System level simulation platform is set up to validate the algorithm and the results turn out that the average throughput is better compared with the traditional scheme.
文摘With the rapid development of wireless communication industry, shortage situation of spectrum resource is increasingly significant. It has become an important topic to study cognitive radio spectrum allocation algorithm that is of higher spectrum utilization ratio, less system power consumption and better algorithm efficiency. Analyzes spectrum allocation models based on genetic algorithm, and then puts forward new improved genetic algorithm. The algorithm adopts niche crowding operation to avoid individual inbreeding. It adaptively adjusts crossover and mutation probability to keep them always in the appropriate state. It provides more equal individual competition opportunity by hierarchical measures, which can effectively avert premature convergence to local optimal solution. It obviously improves the district's total transfer rate on the premise that it has met the requirements of minimum user transfer rate and limitations of maximum total power and maximum bit error rate. Simulation results prove the effectiveness of the proposed algorithm.
基金supported by the Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment,China(2019HJ2096001006)National Natural Science Foundation of China(31970402)。
文摘In this paper,two new species are described and illustrated from China:Flavoperla separata Liu,Li&Shali,sp.nov.from Hubei and Shaanxi Provinces and F.qinlinga Liu,Li&Li,sp.nov.from Shaanxi and Sichuan Provinces,with the discussion of their congeners.All type specimens are deposited in the Entomological Museum of China Agricultural University(CAU)and the Henan Institute of Science and Technology(HIST).
