开放的Lower-ladder型和V型系统的非线性动力学研究

在开放的共振Lower ladder型和V型系统中 ,无激光解的失稳既可以通过Pitchfork分岔发生而导致连续无反转激光输出 ,也可以通过Hopf分岔实现而导致自脉动无反转激光输出。分析了非饱和增益系数、腔损耗速率、粒子注入速率比和粒子退出速率等系统参量的变化对两种失稳的影响。     

W/O型乳胶粒子表面电性的近代测试技术

采取近代表面电学测试技术对乳胶粒子表面电性进行微观测量，取得了一系列反映胶粒表面双电层结构的特征参量，证明表面扩散双电层的存在。为完善W／O型乳胶体系的稳定性理论提供了一定实验依据。     

一种适应性路径选择算法模型研究

本文基于模糊数学规划及系统优化的观点研究了分组交换网络中分组路径的选择问题。文中给出了该问题的模糊0－1整数规划模型，该模型试图在总换算延迟最小化的目标下，寻求一套最合理的路径选择方案。同时，为了避免链路容量利用处于无益虚糜状态，又尽量不超饱和，模型中还采用了模糊链路容量限制条件。     

基于面积特征的城区航空影像匹配方法

基于特征的影像匹配是一类极为广泛和重要的方法。已有的研究体现出了特征对于实施最为匹配的影像之一－－城区航空影像有着极为明显的优越性。文中给出一种新的匹配目标函数的构建，并基于此提出一种城区航空影像匹配算法，给出了算法的实现过程，并以部分东京城区图进行了试验，结果表明文中的方法具有乘法明了，可靠易行和抗旋转性的优点。     

Deep InP Gratings for Opto-Electronic Devices Etched by C12/CH4/Ar Inductively Coupled Plasma

Deep InP gratings are etched by C12/CH4/Ar inductively coupled plasma （ICP） at room temperature. A comparison is made between SiNz mask patterns formed by wet and dry etching. SF6 reactive ion etching is adopted for smooth and vertical sidewall. The etching conditions of C12/CH4/Ar ICP are optimized for high anisotropy, and a 1.7-μm-deep InP grating with an aspect ratio of 10：1 is demonstrated. The technique is then used for the fabrication of 1.55-μm laterally coupled distributed feedback A1GMnAs-InP laser.     

前向神经网络的分类能力的实验研究

目前人们对各类神经元所构成的神经网络的分类能力没有准确地把握，完全从理论上推导网络的分类能力具有太大的难度。本文从实验仿真的角度来研究BP网络的分类能力，为进一步从理论上探讨网络的分类能力打下了基础，也对网络在实际中的应用提供了一些经验性的指导。     

层状耦合约瑟夫森双结中的孤子解

基于Sakai-Bodin-Petersen理论,我们求解了对称的双约瑟夫森结的耦合非线性方程组.结果表明,线性化方程组的同相和反相解所对应的两种磁通运动模式也存在于原始的非线性方程组的解中,同时非线性方程组独有的位相锁定的扭折(kinks)形式的磁通运动在低能情况下会演化为孤子解.     

基于DRM的电子文档保护系统设计与实现

基于DRM的电子文档保护技术是一种新的信息安全技术,主要为了解决电子政务网中电子文档内容保护和安全分发问题.文章设计和实现一种基于DRM的电子文档保护系统,并详细论述了电子文档保护机制、系统模型及其关键技术.     

个人中子剂量气泡探测器研制

中子固体气泡探测器被认为是唯一能够满足国际辐射防护委员会ICRP60要求的个人中子剂量计，它具有从低能中子到高能中子的平坦响应曲线和对γ射线不灵敏的优点.本工作将过热液滴均匀地分布在一种软聚合物中，制成了个人中子气泡剂量计,其灵敏度达到每毫雷姆40个气泡.还介绍了个人中子剂量气泡探测器的原理和制作过程.Neutron solid bubble detector was considered as a unique one for meeting the need of the personal neutron dosimeter recommended by International Committee of radiation protection,ICRP60.It has the flat response for neutron from low energy to high energy,and insensitive for gamma rays. In this work,superheated liquid drops were dispersed into a kind of soft polymer homogeneously.A personal neutron bubble dosimeter has been made,and the sensitivity reached to about 40bubbles/mrem.The principle and the processing procedure of bubble detector were also introduced in this paper.     

CMDC:an iterative algorithm for complementary multi-view document clustering

In response to the problems traditional multi-view document clustering methods separate the multi-view document representation from the clustering process and ignore the complementary characteristics of multi-view document clustering,an iterative algorithm for complementary multi-view document clustering——CMDC was proposed,in which the multi-view document clustering process and the multi-view feature adjustment were conducted in a mutually unified manner.In CMDC algorithm,complementary text documents were selected from the clustering results to aid adjusting the contribution of view features via learning a local measurement metric of each document view.The complementary text document of the results among the dimensionality clusters was selected by CMDC,and used to promote the feature tuning of the clusters.The partition consistency of the multi-dimensional document clustering was solved by the measure consistency of the dimensions.Experimental results show that CMDC effectively improves multi-dimensional clustering performance.