比较原理

In accordance with the austenization microstructure transformation principle,to compare the process characteristics of open-fire furnace ,muffle and semi- open-fire furnace with stainless steel tube.

根据奥氏体化组织转变原理，比较明火炉和马弗炉及不锈钢管式半明火炉的工艺特点，分析和探讨明火炉的优势和工艺特性。

It is most likely that the later writers on Vimanas, wrote as observers and from earlier texts, and were understandably confused on the principle of their propulsion.

这更适合后来在Vimanas上的作者如同他们观测到的和来自比较早的文献，而且为它们的推进原理感到困扰。

This paper is derived from the experiment of the Reconnaissance and Jamming for Ultrashort Frequency Hopping Communication.

本课题来源于《超短波跳频通信的侦察与干扰实验》，该实验的目的是为了以实验的形式展示跳频通信的工作原理，跳频通信的侦察与干扰方法以及跳频通信各种干扰方法的性能比较。

According to investigation of the domestic and foreign commonly-used theory,this paper systemically researches distinguishing multi-path traffic and the tollgates deployment in concept, principle and method by theoretical analysis and technological comparing research. The main aspects are as following: It is the important contents to research the model of toll mode choice in the programming and building of toll system, the purpose of research is to make the toll system source used in reason.

在国内外理论研究的基础上，本文采用理论分析、技术比较等研究方法，分别从概念、原理、方法等方面对联网收费的路径识别、收费车道配置进行系统而深入的研究，具体如下：对缴费方式选择模型进行研究是收费系统规划建设中一项重要内容，研究的目的是使得收费资源合理利用。

Then we introduce theory of ion-exchange process and how to design multimode Y branch optical splitters. Lastly we do some experiment of how to fabricate the device with Li~+-Na~+ ion-exchange technology.

本文首先比较了多模功分器的种类和制作方法，介绍了离子交换的原理，然后对多模Y分支结构的多模光功分器进行设计，并对器件制作所用的Li~+-Na~+离子交换工艺进行实验研究。

Improving vertical resolution for density curves is by means of restructuring the response from large and small spacing sondes and borehole effect correction factor and coherence factor are used. Form the principle of GR logging, calculate volumes in investigating areas taken by borehole, formation, up and low shoulder beds, along with distance between center of gravity of the four unit bodies and detector. Based on the above, the weighting function of each unit body to GR signal contributions are established, thus realizing processing of GR logs with high resolution. The resistivity logging model uses "resolution matching" method to improve the resolution of the logs. After the process, PNN model is made to recognize the oil-gas-water bed. Compared with BPNN, the net work is featured swiftness, accuracy and ease of practical application.

提高密度测井曲线垂直分辨率是通过对重新组合长、短源距探测器响应的算法来提高补偿密度曲线的垂直分辨率，并加入井眼影响校正因子和相关性因子；自然伽马测井模型从基本原理出发，扣除井的影响，计算井筒、地层及其上下围岩所占探测球域体积及其重心到探测器的距离，以此建立各单元体对伽马测井信号贡献的权函数，通过权函数逐层计算不同厚度地层条件下各的单元体权因子，实现自然伽马曲线高分辨率处理；电阻率校正模型应用&分配率匹配&模型，应用低分辨率曲线提高为高分辨率曲线：曲线校正后，利用常规测井资料并且结合校正后的密度、伽马、电阻率等三个对判断油水层有利的指标，通过概率神经网络模型识别储层流体性质，较以前的模型，不仅极大的提高识别正确率，同时与普通神经网络相比较，提高了网络的运行速度和实用性。

In this paper,the stability of carrier frequency is used as the fine-grained characteristics of the individual communication transmitter based on the stability analysis.After that,the techniques of extracting frequency stability are well discussed,three approaches ...

该文重点研究了频率稳定度的有效提取技术，提出了3种有效的提取方法，在详细分析基本原理基础上，进行了仿真实验，比较精确地获取了载波频率稳定度信息，最后利用实际电台进行了验证，结果表明算法的有效性。

In this paper the priciple of the resolver is stated,then the structure and performance of several kinds of resolvers are compared. Then a novel reluctance resolver of one pairs pole with constant air gap is put forward .

本文首先阐明旋转变压器的工作原理，然后通过比较分析几种一对极旋转变压器的结构和性能，提出一种新结构的一对极等气隙磁阻式旋转变压器。

This thesis firstly discusses some research focus of high-frequency power supply and variable circuit topologies are compared here. Then it emphasizes the operating principle of phase shift full bridge converter and realization of soft switching techniques.

首先简单讨论了目前高频开关电源的研究热点，对各种变换电路拓扑结构形式进行了分析比较，然后重点分析了移相全桥变换器的工作原理和软开关技术的实现。

The methods of chip-breaking in machining pipe thread were researched deeply, which are classified into two categories: the methods acting on tools and adding auxiliary devices for chip-breaking. The principle of work, the technical characteristics, the advantages and disadvantages, and so on were analyzed, compared and summarized, and the following research directions were also pointed out.

摘 要：深入研究了管螺纹加工的断屑方法，将目前管螺纹加工的断屑方法分为两大类——作用于刀具上的方法和增加断屑辅助装置的方法，并对各种方法的工作原理、技术特点及优缺点等进行了全面的分析、比较和总结，指出了管螺纹加工断屑方法仍然存在的问题和下一步的研究方向。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。