半导体光放大器

半导体光放大器（SOA）是光通信系统中的重要部件，它可用作在线放大器和光网路中的功能器件。从上世纪90年代开始SOAs的功能应用研究以来，它的应用方法和应用范围均在稳定地增长。     

Preparation of 3-D porous fibroin scaffolds by freeze drying with treatment of methanol solutions

In this study, silk scaffolds with appropriate porous structures were prepared by adjusting solution concentrations and providing treatment with methanol solutions in the way of freeze drying. The effects of the preparation conditions on the microstructures and properties of the scaffolds were discussed. Fibroin solutions with different concentrations of 4, 6, 8, 10 wt% were used respectively to prepare the scaffolds. The effects of the addition of 20 vol% methanol before or after freeze drying to the 4 wt% fibroin solution were investigated. As demonstrated by Scanning Electron Microscope (SEM), the fib-roin scaffolds prepared without methanol had porous microstructures composed of thin sheets, and the sizes of the pores decreased with the increase of the fibroin solution concentrations, while the scaffolds prepared in the presence of methanol showed porous microstructures formed by fine-particle aggregates. The porosities and mechanical properties of the prepared fibroin scaffolds under different conditions were tested. The crystalline structures and conformations of the fibroin scaffolds were detected by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD).     

电力测功电机影响因素分析

讨论了变频电源输入电压的非正弦对测功电机的性能影响，提出了改善不利影响的措施。     

高压脉冲电场的抑菌特性

:高压脉冲电场技术是近年来发展起来的一项很有前景的技术 ,它具有传递均匀、处理时间短、产热少、对食品风味和营养特性影响小等特点 ,能克服食品加热处理或化学单元操作带来的不良影响。综述了高压脉冲电场 (HPEF)产生机理及对微生物的作用特性     

基于材料英语特征的翻译技巧

针对材料英语的一些基本特征以及英汉翻译过程中出现的问题和原因进行了分析探讨,指出材料工作者要了解材料英语的文体和语言特点,翻译时要采取已经普遍接受的译法,不能完全直译,更不能任意创造。同时介绍了翻译过程中常用的一些基本技巧,并通过例句对其进行了详尽阐述。     

Identification of sex pheromones of four economically important species in genusDendrolimus

The female-produced sex pheromone of Dendrolimus superans was identified by gas chromatography (GC), coupled GC-mass spectrometry (GC-MS), electroantennographic (EAG) studies and field tests as a blend of (Z,E)-5,7-dodecadienal (Z5,E7-12:Ald) and (Z,E)-5,7-dodeca- dien-1-ol (Z5,E7-12:OH). In D. kikuchii, (Z,E)-5,7-dodeca- dien-1-yl acetate (Z5,E7-12:OAc) and Z5,E7-12:OH were found by GC and GC-MS analyses. However, in EAG studies male antennae were more sensitive to Z5,E7-12:OAc and (Z,E)-5,7-dodecadien-1-yl propionate (Z5,E7-12:OPr) than Z5,E7-12:OH. For D. spectabilis, Z5,E7-12:OH had been previously reported as the sex pheromone. However, in our studies, traps baited with Z5,E7-12:OH, Z5,E7-12:OAc and Z5,E7-12:OPr in a ratio of 1:1:1 caught three times more males than those baited with Z5,E7-12:OH alone. Relatively strong EAG responses were elicited from male antennae by Z5,E7-12:OH, Z5,E7-12:OAc and Z5,E7-12:OPr, but in addition to Z5,E7-12:OH, only very small amounts of Z5,E7- 12:OAc was found in the pheromone gland. These facts suggest that Z5,E7-12:OAc is a pheromone minor components and Z5,E7-12:OPr is a sex attractant in D. spectabilis. For D. tabulaeformis, Z5,E7-12:OH, Z5,E7-12:OAc and Z5,E7-12: OPr were found in extracts of pheromone glands of female moths, and the three compounds elicited strong EAG responses from antennae of male moths. These three compounds have been reported as a sex attractant of D. tabulaeformis, and our data confirm their roles as components of the sex pheromone of this species. The role of blend components in antagonizing cross attraction between congeners is discussed.     

浅议快乐早操

广播操是一项极具观赏性的集体竞赛及表演项目,它具有同时参与人数多、锻炼价值高、可操作性强、实效性好等特点,还具有很高的表演及观赏价值.因此广播操常被学校选作于早操,但由于诸多原因造成学生做早操质量不高,甚至流于形式.我校一直以来都非常重视广播操,通过规范教学、合理组织、严格管理等一系列的措施.使广播操不但成为全校师生强身健体的一种好方式,而且还成为展示师生精神面貌的一个重要窗口,成为校园文化一道亮丽的风景.使全体师生都能充分享受快乐早操!     

一种用于图像处理的二维开关电容滤波器新的设计系统

二维实时滤波器开关电容网络新的设计方法．该设计是在综合法的基础上，利用无损、非倒数原形电路而得到的开关电容网络．本文所使用的几个计算机软件，可将其集成为一个完整的设计系统．本文作为该设计系统的应用，该滤波器可以象一个ＣＭＯＳ单片那样实现，若与数字滤波器实现相比较，可达到降低成本和减少功耗的目的．     

北疆复种油葵品种特性的初步研究

通过对 5个油葵品种特性不同侧面的量化分析 ,筛选并确定SF1 87和EX399,因其产量高 ,生育期短 ,含油量高 ,株型紧凑 ,便于机械收获 ,可作为北疆地区理想的复播油葵品种     

我国深基坑工程事故的综合分析

从设计、施工、监理和监测等方面综合分析了造成我国近年来高层建筑深基坑事故的各种原因，为提高我国深基坑开挖与支护的水平从技术上提供了一些有效的分析方法和处理措施。