优缺点

Considering the actual condition on the satellite, the forms of the antennas are defined as quadrifilar helix antenna and microstrip antenna, and their pros and cons are discussed.

其主要内容如下： 1 概述了该小卫星上对各种天线的使用需求，并针对该卫星实际情况，选定天线的形式，即四臂螺旋天线和微带天线，同时论述了它们的优缺点。

The paper analyzes the electrical corona phenomena, its effect to high_voltage transmission system and present detecting technology. It puts forward a double spectrums imaging system based on spectrum characteristic of electrical corona. It is all-weather and independent of environment radialization and temperature effect. It responds fast and can work in move .Two light ways image for a scene respectively: one way is UV image ,the other is visible image. Then we use image registration and infusion synthetically to form a complex image .The theory and methods of image infusion is explained.

论文基于电晕放电的光谱特性，针对现有电晕放电检测手段的优缺点，提出了一种全天候、不受环境辐射和温度影响、响应速度快、可进行航拍的双光谱图像检测方法：两个光路分别对同一场景成像，一路是紫外图像，一路是可见光图像，综合利用图像配准与融合技术，形成合成图像，在合成的图像中保留每个传感器所获取的重要信息，图像里既有紫外光源，也有可见光背景图像。

This paper introduces eight methods of tlme-frequency analysis, such as Hilbert transform, Hilbert-Huang transform, sine curve fitting, Ricker wavelet matching, short time Fourier transform, wavelet transform, S transform and Cohen methods, This paper explains the merits and defects of those methods from the time resolution, frequency resolution and the adaptive ability of multi-frequency signals.

本文介绍了Hilbert变换、Hilbert—Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen娄这八种方法，并从时间分辨率、频率分辨率，以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点，对其中的一些方法结合了理论记录进行了试算，进一步阐述了这些方法的长处和不足之处。

This paper introduces eight methods of time-frequency analysis,such as Hilbert transform,Hilbert-Huang transform, sine curve fitting ,Ricker wavelet matching,short time Fourier transform,wavelet .

本文介绍了Hilbert变换、Hilbert-Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen类这八种方法，并从时间分辨率、频率分辨率，以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点，对其中的一些方法结合了理论记录进行了试算，进一步阐述了这些方法的长处和不足之处。

At present , there are two major categaries , which including chromatographic and spectro2 scopic methods.

目前，常用的方法包括色谱法和光谱法，对各类方法及其优缺点进行了论述。

Objective To analyze the effect,advantages and shortcomings of different screenage examination on the diagnosis and treatment for coronary heart disease complicated with main arterial stenosis.

目的 分析不同影像检查在诊断及治疗冠心病合并大动脉狭窄中的作用及其优缺点和最佳选择。

Based on the scumming of architecture ,it analyses the reasons and affecting factors of scumming,discusses the merits and defaults of the existed solving methods,and puts forward the develop direction of preventing the phenomenon of damage the architecture beauty even safety,to prospect to solve the problems on basis.

从建筑物泛霜的现象出发，分析了产生泛霜的原因及影响因素，探讨了现有解决措施的优缺点，并提出了这一危害建筑物美观甚至安全的现象的发展方向，以期从根本上解决泛霜现象。

The main calculation in the particle image matching algorithm is to have the two visual seriate images taken the cross-correlation arithmetic based on the fast fourier transform. This paper discusses the basic principle of the cross-correlation arithmetic in detail, discuss each stage of its produce and development and also discuss the thinking, the merit and the defect of each algorithm. On the base of all these discussing, we confirm our algorithm and realize it in programming with C++.

粒子图像的匹配算法的主要运算是将两连续的视频图像进行基于快速傅里叶变换的互相关运算，本文详细论述了相关算法的基本原理，它的产生和发展的各个阶段，各种算法的思路和优缺点，在此基础上确立了自己的算法并以C++编程实现。

The simulation results, which are consistent with experiments, show their different characteristics clearly as well as the SPAD parameters' effects to its performance.

仿真结果清晰的反映了四种电路各自的特性和优缺点，以及 SPAD 器件寄生参数对于电路性能的影响，得到了与实验基本一致结果。

A methodology is presented for the spatialization and regularization of geological data in developing a volume visualization system of mineral deposits.

系统地论述了矿床体视化过程中由原始采样数据生成空间规则体数据的实现方法，分析了能够形成地矿体空间体数据的主要插值方法的优缺点，在充分考虑矿石品位的空间相关性和变异性的前提下，利用Shepard法实现了空间体数据的生成

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。