比较原理

This paper introduces the principle of variable frequency system and compares it with the original system.

文章介绍了变频系统的原理，对变频系统与原有系统进行了比较。

The analysis results showed that the strapdown approach will be faced to more error sources with sensor noise and motion disturbance. The simulation results verified this and indicated that the performance of the strapdown approach would not be as efficient as that of the direct approach.3. Analyzing the principle and error model of MEMS QRS gyro for the purpose of practical applications, the paper presented an autoregressive model for the gyro signal by means of time series theory.

应用牛顿力学原理分析了光电稳定跟踪机构的惯量耦合关系和动力学模型，推导了平台单轴伺服回路的控制方程，比较了直接稳定和捷联稳定方案在测量噪声和外部扰动共同作用下的性能特点，仿真结果表明，在同等噪声和扰动条件下，捷联稳定面临更多的误差源，因而最终的稳定精度较难达到直接稳定系统的水平。3。

Four popular methods for thoron progeny measurement were discussed, including the aspects of detector, principle, precondition, calculation advantages and disadvantages.

针对4种目前常用的测量220Rn子体的方法、原理、使用条件、计算方法、优缺点等进行了讨论，并在云南的矿井和土房对这4种方法进行了实验比较。

The principle of MUSIC algorithm and theoretical analysis of the spectral separate frequency and frequency detection threshold are included. MUSIC algorithm compared with FFT based algorithm for harmonic frequency estimation using matlab simulation platform .

给出了MUSIC算法的基本原理，对MUSIC算法的频谱分辨能力和频率检测门限进行了理论分析，在Matlab仿真平台下对MUSIC算法和FFT算法的频率估计性能进行了比较。

The titling servo control system of the titling train is identified by varied methods according to their features.

针对摆式列车倾摆伺服控制系统的原理及特点，应用不同的辨识方法对倾摆伺服控制系统进行辨识，并对各种方法辨识结果进行比较。

Recites passive cooling technology methods of buildings, describes the structure of each cooling methods and compares its performance, in the same time, summarizes passive cooling technology methods of buildings fit for drought and torridity area, introduce basal principle of moisture-conditioned material, new pattern porosity moisture-conditioned material Used in buildings, recommend the structure and transfer principle of this material.

从叙述建筑物被动冷却方式入手，对各种冷却方式的结构特征进行了描述和性能比较，同时总结了适用于干热地区环境因素的建筑物被动冷却方式，并重点介绍了近年来迅速发展应用的调湿材料的基本原理，提出了一种新型的用于贴附于建筑物墙体外表面的多孔调湿材料，简述了这种材料的结构特征及内部的传递机理。

The design of image fountain signal, imaging technique and data processing are three key technologies to carry out CCD torsional oscillation measurement method. By analyzing the design principle, the paper devised an image source signal alternated with black and white strip and it has a good effect. Meanwhile, the system demand of imaging link was analyzed, such as light source, lens and camera etc. In addition, the principles of both the correlation algorithm and generalized correlation time delay estimation based on adaptive technology were studied, and a comparison between them was made as well.

本文中分析了图像源信号的设计原则，并设计了一种黑白相间的倾斜条纹图案作为图像源信号，获得了良好的测量效果；分析了测量系统对光源、镜头、相机等成像环节的要求；研究了相关算法和基于自适应技术的广义相关时延估计法两种数据处理算法的原理，并对两种方法的性能进行了比较。

The working principle and the design requirement of the novel trapezoid prism are analyzed in theory.

从理论上分析了其工作原理及设计加工要求，计算了最佳均匀截面位置，并与普通棱镜均匀器进行了比较。

In this paper, a method of assembling simultaneously the heated specimen and the unheated bars was discussed.

本文介绍了自动组装原理和过程，比较了在200℃时导杆和试件同时加热，与采用自动组装所产生的透射波形的差异。

In the light of the requirement to reliability of protective relayings for HVDC power transmission system, the reliability models for several typical redundant configuration schemes are built based on the principle of reliability analysis for unrepairable systems with the structure of series-parallel connection, and the reliability of various redundant modes are compared.

根据高压直流输电保护系统的可靠性要求，基于不可修复系统串并联结构的可靠性分析原理，建立了几种典型冗余配置方式的可靠性模型，比较了各种冗余方式的可靠性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。