The pests, diseases and weeds in sugarcane areas of Lincang Nanhua Sugar Industry Co.,Ltd. were investigated at seedling stage, growth stage and maturity stage of sugarcane from 2012 to 2016. The occurrence and damag...The pests, diseases and weeds in sugarcane areas of Lincang Nanhua Sugar Industry Co.,Ltd. were investigated at seedling stage, growth stage and maturity stage of sugarcane from 2012 to 2016. The occurrence and damage of diseases, pests and weeds were analyzed, and the problems in prevention and control were discussed based on the local conditions of sugarcane production. The species, occurrence and damage characteristics of diseases, pests and weeds were ascertained, and the corresponding strategies and technical measures were proposed.展开更多
The filter and antenna are two key components of the radio frequency(RF)front-end.When the antenna is directly connected with the filter,additional mismatch losses will be caused.Therefore,the antenna and filter are i...The filter and antenna are two key components of the radio frequency(RF)front-end.When the antenna is directly connected with the filter,additional mismatch losses will be caused.Therefore,the antenna and filter are integrated into a single device to provide both filtering and radiating functions.In this way,many advantages,like low cost,light weight,small size and lower insertion loss can be obtained.In this paper,the co-design approaches of RF filter-antenna are reviewed.Based on the open literatures,the integrated approaches of filtering antenna can be classified into five main categories:1)Co-design by optimizing the interfacing impedance,2)co-design according to the synthesis approach of filter,3)co-design by embedding novel resonators within the feeding structures,4)co-design by employing auxiliary physical structures,and 5)other methods.The RF filter-antenna system can improve the integration degree of RF frontend,reduce its size and cost,and optimize its performance.展开更多
基金Supported by Special Fund for China Agricultural Industry Research System(CARS-170303)Special Fund for Agricultural Industry Research System of Yunnan Province(YNGZTX-4-92)
文摘The pests, diseases and weeds in sugarcane areas of Lincang Nanhua Sugar Industry Co.,Ltd. were investigated at seedling stage, growth stage and maturity stage of sugarcane from 2012 to 2016. The occurrence and damage of diseases, pests and weeds were analyzed, and the problems in prevention and control were discussed based on the local conditions of sugarcane production. The species, occurrence and damage characteristics of diseases, pests and weeds were ascertained, and the corresponding strategies and technical measures were proposed.
基金supported by the National Science Foundation of China under Grant No.61771295the Natural Science Young Foundation of Shanxi Province under Grant Nos.2014021021-1 and 2015011042
文摘The filter and antenna are two key components of the radio frequency(RF)front-end.When the antenna is directly connected with the filter,additional mismatch losses will be caused.Therefore,the antenna and filter are integrated into a single device to provide both filtering and radiating functions.In this way,many advantages,like low cost,light weight,small size and lower insertion loss can be obtained.In this paper,the co-design approaches of RF filter-antenna are reviewed.Based on the open literatures,the integrated approaches of filtering antenna can be classified into five main categories:1)Co-design by optimizing the interfacing impedance,2)co-design according to the synthesis approach of filter,3)co-design by embedding novel resonators within the feeding structures,4)co-design by employing auxiliary physical structures,and 5)other methods.The RF filter-antenna system can improve the integration degree of RF frontend,reduce its size and cost,and optimize its performance.
