一种基于光照模型的多源遥感图像融合算法

多光谱图像和全色图像是目前卫星遥感领域最常见的传感器图像。为了充分地发挥这两类遥感图像数据的互补性信息，增强二者的清晰度和解译能力，在SFIM算法的基础上，将IHS变换与SFIM相结合，并对原有的均值滤波器进行改进，提出了一种自适应加权均值滤波器。通过一组多光谱图像和全色图像的融合实验，并对比常用的IHS融合方法和SFIM方法，证明了新算法在保持多光谱图像光谱特性的同时，能有效提高融合图像的空间分辨能力。     

500kV油浸式平波电抗器电磁场特性的数值分析

通过对平波电抗器电磁场特性的数值计算与分析,得到了电磁场分布规律和绕组谐波损耗等参数。     

一种基于能量准则的平滑滤波器

本文提出一种基于能量准则的平滑滤波器,它可以用于滤除噪声、检测纹理结构和检测边缘.和高斯函数的拉普拉斯算子相比较,这种平滑滤波器用于边缘检测时,具有更好的定位精度以及同样的噪声抑制效果,对于各种图象所进行的实验,其结果是令人满意的.     

Solution of transport equations on unstructured meshes with cell-centered colocated variables. Part I: Discretization

This paper describes discretization of transport equations on unstructured meshes with cell-centered colocated variables. The problem of zig-zag pressure prediction is eliminated by introducing smoothing pressure correction derived by Date [A.W. Date, Complete pressure correction algorithm for solution of incompressible Navier-Stokes equations on a non-staggered grid, Numer. Heat Transfer, Part B 29 (1995) 441-458]. The finite-volume discretization is carried out in a structured grid like manner by invoking a special line-structure to evaluate convective-diffusive transport across the cell-faces.     

平滑学习算法在机器翻译消歧中的应用

机器翻译中,在词性标注和句法语义分析阶段经常会遇到歧义,使用基于统计方法的词汇评分和句法语义评分就是对词性标注和句法语义分析阶段产生的歧义进行消歧,在用统计方法消歧时,经常遇到的一个现象就是数据稀疏问题,本文对词汇评分和句法语义评分遇到数据稀疏现象使用改进的Turing公式来平滑参数,给出平滑算法对词汇评分平滑的处理过程,在实验中给出语料与参数数量,正确率的实验结果。     

平波电抗器电容器放电试验电压波形高频过冲的抑制

在特高压平波电抗器的电容器放电试验中,电压波形的波前会出现频率为数百千赫的高频振荡和过冲。本文计算表明,如果单纯地依靠波头阻尼电阻来消除高频振荡和过冲,电容器放电持续时间将过短。因此提出了一种使用暂态阻波器抑制过冲的方法,并通过仿真计算和试验,证明其效果十分明显。     

具高可读性的Cohen类时频分布及其在扩频通信中的应用

从Ｃｏｈｅｎ类时频分布的特点出发讨论了基于几何重心的坐标平移法,给出了具有高可读性的修正ｃｏｈｅｎ类时频分布的通用计算方法,分析了基于高可读性时频分析与检测的时变自适应线性相位ＦＩＲ滤波器在ＤＳＳＳ抗干扰中的应用,并与横向Ｗｉｅｎｅｒ内插滤波器在ＳＮＲ的改善方面作了比较,给出了多点频连续波干扰及ＰＮ序列经过滤波之后的结果．     

雷达信号包络特征的检测与分析

雷达信号的分类识别是电子对抗的一个重要方面 ,而雷达信号包络分析是识别它的一种重要方法 ,它利用检测设备截获敌方雷达信号 ,通过分析它的包络特征来识别雷达信号以便于干扰或反干扰。采用平滑、微分的方法对包络进行处理 ,获得它的各项参数信息 ,从而达到对雷达信号识别的目的     

On sub-ideal causal smoothing filters

Smoothing causal linear time-invariant filters are studied for continuous time processes. The paper suggests a family of causal filters with almost exponential damping of the energy on the higher frequencies. These filters are sub-ideal meaning that a faster decay of the frequency response would lead to the loss of causality.     

Development and performance test of smart power conditioner for value-added PV application

It is a disadvantage that PV power generation is only useful for clear daytime. However, a new 24 hours of application in an extended area can be added by active utilization of potential ability of PV power conditioner. For this purpose, a new multi-functional power conditioner was developed, which has a smoothing function to reduce PV output variation and load fluctuation, and also has additional function to compensate harmonics current and reactive power caused by customer's load.As a result of indoor testing, a reduction rate of around for harmonics current and reactive power were achieved. In addition, the reduction rate around for smoothing of PV output variation and load fluctuation were verified.The work was promoted by NEDO as part of the New Sunshine Project in Japan.