基于Canny边缘检测的数字稳像算法研究

提出了一种将改进的Canny边缘检测技术应用于数字电子稳像中的方法,通过选择图像边缘线的交叉点作为特征点,以此确定仿射模型的运动参数,并进行运动补偿从而达到输出稳定视频图像的目的。实验结果表明用这种方法提取的特征点具有良好的稳定性,实际应用效果良好。     

基于模糊理论的软件寿命周期费用评价模型

软件寿命周期费用评价模型涉及到软件开发、使用和维护过程中各种资源最有效利用的权衡分析。由于软件开发不是一门严谨的精确科学,往往存在大量具有不确定性的需求以及许多未知和不确定因素,所有这些都给软件寿命周期费用评价带来模糊效用。本文将模糊理论应用于软件寿命周期费用的评价,给出了从评价属性模糊值的确定、模糊评价模型的建立,到模型求解和最优方案选择的模糊评价方法,并通过对一个算例的分析,证明了该模型的可行性。     

HL-2A装置反馈控制系统程序放电的实现

HL-2A装置反馈控制系统的主要任务是逐步实现对等离子体电流、位移、形状和密度的实时反馈控制，从而能够按照实验目的对托卡马克等离子体进行各种试验。主要介绍了HL-2A装置反馈控制系统的硬件组成以及软件的结构和特点。这个系统能够很好地满足HL-2A装置程序放电的要求。     

Application of fiber interferometer in coherent Doppler lidar

A novel coherent Doppler lidar (CDL) system based on single-mode fiber (SMF) components and instruments is presented to measure the speed of target. A fiber interferometer used in CDL system is reported.This fiber mixer is employed as a coherent receiver to resolve the shifts of signal-to-noise ratio (SNR) and mixing efficiency induced by backscattered field's wavefront error. For a certain wavelength, the maximum coupling efficiency between signal and SMF is determined by the ratio of pupil diameter to focal length of the coupling lens. The legible interference patterns and spectrum signals show that fiber interferometer is suitable to compensate for amplitude and phase vibrations. This robust coherent receiver can achieve improved CDL system performance with less transmitter power.     

Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO

A compact, walk-off compensated dual-wavelength KTP OPO near the degenerate point of 2.128 μm pumped by a Nd:YAG pulsed laser is employed as the pump for terahertz (THz) source based on difference frequency generation (DFG) in a GaSe crystal. Coherent THz radiation that is continuously tunable in the range of 81-1617 μm (0.186-3.7 THz) is achieved. An enhancement of 76.7% in average for the THz energies at different wavelengths is realized using the walk-off compensated KTP OPO than the common one. Using a 8 mm-long GaSe crystal, the maximum output THz pulse energy is 48.9 nJ with the peak power of 11 W, corresponding to the energy conversion efficiency of 5.4 × 10^− 6 and the photon conversion efficiency of about 0.09%.     

Development of TUSCAT: A software for light scattering studies on spherical, spheroidal and cylindrical particles

An integrated software package TUSCAT (Tezpur University SCATtering Software) incorporated with a graphical user interface (GUI) was developed for modeling electromagnetic scattering from small particles and also to yield characteristic properties of the scattering particles from experimental data. Its interactive features enable the user to observe the changes in output scattering properties in real time. In addition to its ease of use, it has high computational accuracy, efficiency, reliability and adaptability.     

基于动态特性补偿的冲击波测试数据处理方法

利用激波管对传感器进行动态标定,采用特殊白化滤波器广义最小二乘迭代法建立冲击波测试传感器的数学模型并对其动态特性进行分析,提出采用基于零极点相消原理补偿法来对传感器动态特性进行补偿。实际试验的测试数据处理应用表明,基于动态特性补偿的数据处理方法能够提高传感器动态特性和冲击波测试数据的准确度。

     

分子振动计算机模拟

我们用Ｃ语言开发出用于显示分子图形及振动的Ｍｏｌｆｉｇ软件，并为程序配备了多种功能和一个友好的人机交互界面以方便使用。经试用表明，该软件可为我们加强理解分子的振动光谱与结构之间的关系提供了有效的帮助。     

Adaptive population-based multi-objective optimization in SDN controllers for cost optimization

In Wireless Sensor Networks, Software Defined Networks (SDN) provide a logically centralized control plane as a potential means of streamlining network management (WSNs). The employment of several SDN controllers to build a physically distributed SDN is a common tactic to boost speed, expand scalability, and offer fault tolerance. However, the deployment of many controllers results in increased synchronization and deployment expenses. Therefore, selecting the optimal location for SDN controllers to improve WSN performance is a research issue. In this paper, the multi-objective optimization problem known as the controller placement problem (CPP) is initially formulated. Cost, time, and reliability are just a few of the restraints that are taken into consideration in this regard. In addition, a new Adaptive Population-Based Cuckoo Optimization (APB-CO) for optimal controller placement is implemented. In the end, APB-CO performs experiments to validate the efficacy by analyzing Sync (7.5), Coverage (47), Controller Cost (4.8), and Fitness (0.6983) for the 100th node variation at network 1. The proposed model obtained the controller cost as 34.4, compared to the existing method such as Simulated Annealing (44.3) and Greedy Approach (42.6).     

一种软件工程管理模型研究

软件作为一种逻辑实体,具有难以度量、易出错、必须维护和成本昂贵等显著的特点。在规定的时间和预算内开发出符合质量要求的软件是一件非常困难的事情。经过国内外40多年来的研究与分析,发现产生这一问题的关键原因在于对软件过程的管理不尽如人意。为了提高软件工程管理的水平,国内外工程界尝试过很多的方法和手段,比如：制定并实施软件工程标准和规范、使用工具提高软件生产率和质量、通过软件评测促进工程化水平等。虽然GJB 5000A标准从理论上和体系上对软件工程管理提供了一定的参考,但在实际工程中仍缺乏一套完整、易于实施、体现技术管理特点的软件工程管理模型作为一个项目管理的指导。因此,为了应对上述问题,解决工程实际中的困难,文中面向软件工程项目管理的需要,提出一种的分层次、全周期、多角度的软件工程管理模型,并通过一个项目实例进行分析和验证。最后,文中将对软件工程管理研究的发展趋势进行展望。