Wang: The U. S. stated purposes of military actions against Iraq are to "overthrow Saddam" and "transform Iraq. " I am afraid such actions would cause a big stir. Tang: I think so. American militar...Wang: The U. S. stated purposes of military actions against Iraq are to "overthrow Saddam" and "transform Iraq. " I am afraid such actions would cause a big stir. Tang: I think so. American military actions against Iraq will not only promote the birth of a new Iraq but also change the international relations and military balance in the Middle East. Washington’s revealed intention shows that it hopes to create a democratic and pro-展开更多
This paper compares the two different rural management methods of"emperor’s power far away from the countryside"and"town in charge of village affairs",which shows that the extreme grass-roots mana...This paper compares the two different rural management methods of"emperor’s power far away from the countryside"and"town in charge of village affairs",which shows that the extreme grass-roots management system is not conducive to rural development.This paper also points out that rural development needs to find a road of sustainable development in line with its own characteristics,which is the fundamental shortcut to change poverty and become rich for a long time.展开更多
针对现有大功率连续波注入锁频磁控管的输出结构插入损耗大,功率容量低的局限,本文提出了一种S波段大功率锤状能量输出器,并给出了其设计原理。利用CST微波工作室对该结构进行仿真验证,并将其与传统柱形输出结构进行了对比分析。在2.4~2...针对现有大功率连续波注入锁频磁控管的输出结构插入损耗大,功率容量低的局限,本文提出了一种S波段大功率锤状能量输出器,并给出了其设计原理。利用CST微波工作室对该结构进行仿真验证,并将其与传统柱形输出结构进行了对比分析。在2.4~2.5 GHz范围内,新结构的插入损耗大于-0.002 d B,远优于传统柱形结构。CST仿真显示,球半径与陶瓷窗厚度对其传输性能影响较大。将能量输出器与磁控管连接进行仿真,磁控管正常起振,输出频谱较好。最后,对窗结构做了热分析与应力分析,在输入功率为30 k W时,最大温升27℃,最大应力156.759 MPa,最大形变为0.010 mm。该能量输出器具有良好的传输特性与机械性能,可以满足工程需要。展开更多
为了解决传统的输变电工程设计人工审查方式效率低下,且容易出错的问题,利用计算机网络技术,开发设计了基于B/S的输变电工程设计评审系统。其以.NET平台为基础,采用基于B/S的分层结构作为系统架构,并使用ASP.NET技术、Java Script脚本...为了解决传统的输变电工程设计人工审查方式效率低下,且容易出错的问题,利用计算机网络技术,开发设计了基于B/S的输变电工程设计评审系统。其以.NET平台为基础,采用基于B/S的分层结构作为系统架构,并使用ASP.NET技术、Java Script脚本语言来完成系统建设。同时使用SQL Server 2005搭建系统数据库,并通过ADO.NET组件实现对数据库的连接和操作,从而实现了输变电工程评审项目的上报、查询、审查与跟踪。该系统实现了输变电工程设计评审工作的自动化管理。展开更多
文摘Wang: The U. S. stated purposes of military actions against Iraq are to "overthrow Saddam" and "transform Iraq. " I am afraid such actions would cause a big stir. Tang: I think so. American military actions against Iraq will not only promote the birth of a new Iraq but also change the international relations and military balance in the Middle East. Washington’s revealed intention shows that it hopes to create a democratic and pro-
文摘This paper compares the two different rural management methods of"emperor’s power far away from the countryside"and"town in charge of village affairs",which shows that the extreme grass-roots management system is not conducive to rural development.This paper also points out that rural development needs to find a road of sustainable development in line with its own characteristics,which is the fundamental shortcut to change poverty and become rich for a long time.
文摘针对现有大功率连续波注入锁频磁控管的输出结构插入损耗大,功率容量低的局限,本文提出了一种S波段大功率锤状能量输出器,并给出了其设计原理。利用CST微波工作室对该结构进行仿真验证,并将其与传统柱形输出结构进行了对比分析。在2.4~2.5 GHz范围内,新结构的插入损耗大于-0.002 d B,远优于传统柱形结构。CST仿真显示,球半径与陶瓷窗厚度对其传输性能影响较大。将能量输出器与磁控管连接进行仿真,磁控管正常起振,输出频谱较好。最后,对窗结构做了热分析与应力分析,在输入功率为30 k W时,最大温升27℃,最大应力156.759 MPa,最大形变为0.010 mm。该能量输出器具有良好的传输特性与机械性能,可以满足工程需要。
文摘为了解决传统的输变电工程设计人工审查方式效率低下,且容易出错的问题,利用计算机网络技术,开发设计了基于B/S的输变电工程设计评审系统。其以.NET平台为基础,采用基于B/S的分层结构作为系统架构,并使用ASP.NET技术、Java Script脚本语言来完成系统建设。同时使用SQL Server 2005搭建系统数据库,并通过ADO.NET组件实现对数据库的连接和操作,从而实现了输变电工程评审项目的上报、查询、审查与跟踪。该系统实现了输变电工程设计评审工作的自动化管理。
