A simple theory is developed for the analysis of isolation of dual-polarization multiplex microstrip antennas. The analysis is based on the 'cavity model' and the 'reaction principle'. The shape of the...A simple theory is developed for the analysis of isolation of dual-polarization multiplex microstrip antennas. The analysis is based on the 'cavity model' and the 'reaction principle'. The shape of the field distribution between the patch and ground plane is assumed to be well approximated by that of the resonant modes of a corresponding magnetic and electric walled cavity. Two element microstrip antennas of various geometries for either transmitting or receiving linearly and circularly polarized waves are studied. Some methods are found to reduce their physical dimensions and to evaluate the isolation between the elements for various configurations.展开更多
[Objective] The research aimed to improve the method of isolation of algae.[Method] The samples were cultured in liquid medium after pre-culture in natural medium.[Result]12 species of algae were isolated from the sam...[Objective] The research aimed to improve the method of isolation of algae.[Method] The samples were cultured in liquid medium after pre-culture in natural medium.[Result]12 species of algae were isolated from the sample.[Conclusion] The method is useful and easy to be handled.展开更多
Objective] This study was conducted to further explore the diversity of Saccharomyces cerevisiae_from Chateau Changyu Moser XV and realize better de-velopment and utilization of Saccharomyces cerevisiae resources. [Me...Objective] This study was conducted to further explore the diversity of Saccharomyces cerevisiae_from Chateau Changyu Moser XV and realize better de-velopment and utilization of Saccharomyces cerevisiae resources. [Method] ln this study, the wine grape regions of Chateau Changyu Moser XV were taken as the research object. The Saccharomycetes_in the soil was isolated, screened and ob-served in the natural fermentation process of grape berry epidermis and the fruit. The 32 Saccharomycetes strains were preliminarily classified based on WL nutrient agar, and 26S rDNA D1/D2 sequence analysis was conducted. [Result] Total y, 4 kinds of Saccharomycetes were identified in this study, including Pichia kluyveri, Hanseniaspora uvarum, Saccharomyces cerevisiae_and Cryptococcus magnus. [Con-clusion] The main species of Saccharomycetes in the wine grape region of Chateau Changyu Moser XV were preliminarily determined, which provides theoretical basis and research basis for the brewing of wine with special characteristics.展开更多
以某工程项目为对象,以50 a 10%超越概率E1 (地震作用)和50 a 2%超越概率E2 (地震作用)的地震动加速度时程数据为输入参数建立有限元模型来分析普通橡胶支座和双曲面球形减震支座对桥梁整体结构抗震特性的影响作用。研究结果表明:E2地...以某工程项目为对象,以50 a 10%超越概率E1 (地震作用)和50 a 2%超越概率E2 (地震作用)的地震动加速度时程数据为输入参数建立有限元模型来分析普通橡胶支座和双曲面球形减震支座对桥梁整体结构抗震特性的影响作用。研究结果表明:E2地震力作用下,双曲面球形减震支座下梁端横向和纵向位移均大幅度下降,支座横桥向位移增加,橡胶支座纵向位移增大而滑动支座纵向位移减小,减隔震支座降低了相邻主梁碰撞而造成结构震害; E1地震力作用下,桥梁立柱和桩基结构在橡胶支座和双曲面球形减隔震支座下均不会发生基于结构抗弯能力不足而导致基础震害,但双曲面球形减隔震支座下桥梁立柱底部和桩基弯矩均大幅下降;E2地震力下,橡胶支座的1#、2#桥墩立柱和1#、2#、3#、4#桥墩桩基结构弯矩超过结构的抗弯承载能力,桥梁立柱和桩基结构均会发生严重破坏;双曲面球形减隔震支座下桥梁立柱底部和桩基弯矩均大幅下降,低于桥梁立柱的抗弯承载力,桥梁结构不会发生结构破坏。展开更多
文摘A simple theory is developed for the analysis of isolation of dual-polarization multiplex microstrip antennas. The analysis is based on the 'cavity model' and the 'reaction principle'. The shape of the field distribution between the patch and ground plane is assumed to be well approximated by that of the resonant modes of a corresponding magnetic and electric walled cavity. Two element microstrip antennas of various geometries for either transmitting or receiving linearly and circularly polarized waves are studied. Some methods are found to reduce their physical dimensions and to evaluate the isolation between the elements for various configurations.
文摘[Objective] The research aimed to improve the method of isolation of algae.[Method] The samples were cultured in liquid medium after pre-culture in natural medium.[Result]12 species of algae were isolated from the sample.[Conclusion] The method is useful and easy to be handled.
基金Supported by Scientific Research Project of Ningxia Grape and Wine Technology Innovation Center(1505)District-level Undergraduate Innovation Program of Northem University for Nationalities(QJCX-2015-028)~~
文摘Objective] This study was conducted to further explore the diversity of Saccharomyces cerevisiae_from Chateau Changyu Moser XV and realize better de-velopment and utilization of Saccharomyces cerevisiae resources. [Method] ln this study, the wine grape regions of Chateau Changyu Moser XV were taken as the research object. The Saccharomycetes_in the soil was isolated, screened and ob-served in the natural fermentation process of grape berry epidermis and the fruit. The 32 Saccharomycetes strains were preliminarily classified based on WL nutrient agar, and 26S rDNA D1/D2 sequence analysis was conducted. [Result] Total y, 4 kinds of Saccharomycetes were identified in this study, including Pichia kluyveri, Hanseniaspora uvarum, Saccharomyces cerevisiae_and Cryptococcus magnus. [Con-clusion] The main species of Saccharomycetes in the wine grape region of Chateau Changyu Moser XV were preliminarily determined, which provides theoretical basis and research basis for the brewing of wine with special characteristics.
文摘以某工程项目为对象,以50 a 10%超越概率E1 (地震作用)和50 a 2%超越概率E2 (地震作用)的地震动加速度时程数据为输入参数建立有限元模型来分析普通橡胶支座和双曲面球形减震支座对桥梁整体结构抗震特性的影响作用。研究结果表明:E2地震力作用下,双曲面球形减震支座下梁端横向和纵向位移均大幅度下降,支座横桥向位移增加,橡胶支座纵向位移增大而滑动支座纵向位移减小,减隔震支座降低了相邻主梁碰撞而造成结构震害; E1地震力作用下,桥梁立柱和桩基结构在橡胶支座和双曲面球形减隔震支座下均不会发生基于结构抗弯能力不足而导致基础震害,但双曲面球形减隔震支座下桥梁立柱底部和桩基弯矩均大幅下降;E2地震力下,橡胶支座的1#、2#桥墩立柱和1#、2#、3#、4#桥墩桩基结构弯矩超过结构的抗弯承载能力,桥梁立柱和桩基结构均会发生严重破坏;双曲面球形减隔震支座下桥梁立柱底部和桩基弯矩均大幅下降,低于桥梁立柱的抗弯承载力,桥梁结构不会发生结构破坏。
