Ka波段大回旋电子注介质加载回旋行波管输入耦合器研究

针对Ka波段大回旋电子注回旋行波管设计了一个TE 21模式输入耦合器。该输入耦合器结构为Y形功分器,将输入的矩形波导TE 10模式转换为圆波导的TE 21模式进行输出。本文对其转换原理进行了简要介绍,通过仿真确定了输入耦合器模型的参数,并加工出部件,并进行了实际测试,测试的结果满足Ka波段大回旋行波管的信号输入要求。

雌二醇经雌激素受体调控分拣蛋白相关受体A对小鼠海马神经元树突棘密度和突触蛋白表达的影响

目的探讨雌二醇(E_(2))调控分拣蛋白相关受体A(SorLA)表达对小鼠海马神经元树突棘密度和突触蛋白表达的影响及机制。方法32只C57BL/6雌性小鼠随机分为假手术(sham)组、卵巢切除(OVX)组、卵巢切除+E_(2)组(OVX+E_(2))组、卵巢切除+氟维司琼(Fu)+E_(2)组(OVX+Fu+E_(2))组,通过Western blotting和免疫组织化学染色检测小鼠海马CA1区SorLA表达;40只C57BL/6雌性小鼠随机分为假手术+空白病毒(sham+NC-sgRNA)组、卵巢切除+空白病毒(OVX+NC-sgRNA)组、卵巢切除+空白病毒+E_(2)(OVX+NC-sgRNA+E_(2))组、卵巢切除+SorLA敲降病毒+E_(2)组(OVX+Sorl1-sgRNA+E_(2))组,通过高尔基染色检测小鼠海马CA1区神经元树突棘密度;通过Western blotting和免疫组织化学染色检测小鼠海马CA1区突触后致密蛋白95(PSD-95)和突触蛋白1(SYN1)表达。结果与sham组相比,和OVX组和OVX+Fu+E_(2)组SorLA蛋白表达显著降低(P<0.05),和OVX+E_(2)组差异无显著性(P>0.05);与sham+NC-sgRNA组相比,OVX+NC-sgRNA组和OVX+Sorl1-sgRNA+E_(2)组树突棘密度和PSD-95、SYN1表达显著降低(P<0.05),与OVX+NC-sgRNA+E_(2)组差异无显著性(P>0.05)。结论E_(2)可通过雌激素受体上调SorLA表达,进而增加小鼠海马神经元树突棘密度和突触蛋白表达。

Vibration Modal Analysis of Compressor Blade based on ANSYS

Compressor is an important part of aero engine. In the environment of high temperature and high pressure,compressor blade will suffer from several physical and chemical processes,such as centrifugal force,aerodynamic force vibration and oxidation. These processes will lead compressor blade to fatigue fracture,and at the same time,make negative effects on the engine’ s overall performance. Based on the software ANSYS15. 0,we made strength analysis and modal analysis of compressor blade in this paper. As a result,we got its natural frequencies,relevant modal parameters and vibration mode cloud pictures. After analyzing the influence that centrifugal force made on modal parameters,we predicted the expected damage of the blade. Eventually the analysis results will provide the basis for overall performance evaluation,structural crack detection,fatigue life estimation and strength calculation of aircraft engine compressor.