利用锁模光纤激光器做时钟提取器的OTDM通信系统

简短评述了大容量和超大容量光通信系统的ＷＤＭ和ＯＴＤＭ技术，提出了一个在ＯＴＤＭ通信系统中用锁模光纤激光器做时钟提取器的新方法，给出了一个利用设置波分预标时钟脉冲方案构成的新的全光型ＯＴＤＭ通信实验系统结构。     

符号运算在求解车辆传动系扭振中的应用

介绍符号运算方法在用拉普拉斯变换方法求解车辆传动系扭振过程中的作用．针对弹性联轴器的匹配计算，给出了具体求解实例．实践表明，与传统的纯数值计算方法相比，符号运算方法可以方便准确地处理车辆传动系统扭振分析中的非线性等复杂问题，具有推广应用价值．     

Voigt线型及其精确快速算法

通过把上半复平面分为４个区，并在每一区利用不同近似，建立了一种精确快速计算Ｖｏｉｇｔ函数、修正的Ｖｏｉｇｔ函数和Ｖｏｉｇｔ函数偏导数的算法，其最大相对误差小于５×１０－４．该算法是Ｌｉｎｅ－ｂｙ－Ｌｉｎｅ大气透过率／辐射强度计算及其相关应用的有效算法．     

Feature extraction using recursive cluster-based linear discriminant with application to face recognition.

A novel recursive procedure for extracting discriminant features, termed recursive cluster-based linear discriminant (RCLD), is proposed in this paper. Compared to the traditional Fisher linear discriminant (FLD) and its variations, RCLD has a number of advantages. First of all, it relaxes the constraint on the total number of features that can be extracted. Second, it fully exploits all information available for discrimination. In addition, RCLD is able to cope with multimodal distributions, which overcomes an inherent problem of conventional FLDs, which assumes uni-modal class distributions. Extensive experiments have been carried out on various types of face recognition problems for Yale, Olivetti Research Laboratory, and JAFFE databases to evaluate and compare the performance of the proposed algorithm with other feature extraction methods. The resulting improvement of performances by the new feature extraction scheme is significant.     

Modeling Power Supply Noise in Delay Testing

Excessive power supply noise during test can cause overkill. This article discusses two models for supply noise in delay testing and their application to test compaction. The proposed noise models avoid complicated power network analysis, making them much faster than existing power noise analysis tools. can cause performance degradation and     

引信用电火工品抗电磁环境危害加固技术研究

介绍了武器系统电磁环境内涵和国内外有关引信与火工品电磁环境标准，分析了电磁环境对火工品的危害，简介了高安全、高可靠火工品研究概况，阐述了电火工品抗电磁环境危害加固技术，对抗电磁环境危害用电磁衰减塞进了研究与原理性试验。     

Tunable blazed gratings

In this paper, we report on the design, fabrication, and characterization of blazed gratings made tunable by electrostatic actuation. We combine KOH etching and deep-reactive ion etching (DRIE) to fabricate tunable blazed gratings (TBGs) on silicon-on-insulator wafers with optical-quality mirror surfaces on {111} crystalline planes. The actuators that are used to position the individual grating elements are designed to reduce rotation to levels acceptable for spectroscopic applications. We characterize the fabricated devices mechanically, verify the rotation-reduction design, and demonstrate the functionality of TBGs as tunable filters.     

燃料型减压塔汽提段工艺参数对拔出率的影响

探讨减压塔汽提与闪蒸的关系,分析汽提对蜡油拔出率及减压渣油中500 ℃以下馏分含量等技术指标的影响.通过模拟计算和现场数据说明,汽提段内采用填料较塔盘更具优势.与塔盘相比,填料具有压力降小、理论板数多的特点,可以显著提高拔出率,降低减压渣油中500 ℃以下馏分含量.基于汽提段结焦的机理,澄清了汽提段填料层易结焦的误区,提出了解决结焦问题的具体措施.     

实用运算放大器网络中的虚地性质

本文提出用一个理想电压控制电流源(VCCS)并接于嵌在一个倒相放大器电路中的实际运算放大器(OP.amp)输入端,虚地性质(VGP)可以扩展到使用的运算放大器单位增益带宽那样高的频率.文中给出用真正运算放大器的VCCS的实用电路.用互补变换法可得出非倒相放大电路图.     

韶钢第三炼钢厂2#板坯连铸机漏钢原因分析

针对韶钢三炼钢板坯连铸机的漏钢原因从设备与工艺上进行分析,提出整改措施,对韶钢以后的板坯发展提供了经验.