查询词典 principium

This text introduce a sort of new pattern soft switch PFC circuit .First, analyze the develop course of the on-off power supply. Second, relate the harm of humorous wave to the commonality electricity net. Third, present the topology and the principium chart of the soft switch PFC and analyze it .At last ,set the parameter and simulates the converter of with matlab simulation. more over ,get the hold of well voltage and current wave , minish the spoilage of the circuit, enhance the efficience of the circuit, meet the demand of the miniaturization and viridity.

本文引入了一种新型的软开关PFC电路，首先分析了开关电源的发展历程，然后讲了谐波给公共电网造成的危害，再给出了这种软开关PFC的电路拓扑及原理图并对其工作原理进行了分析，最后对其参数进行设置在MATLAB软件进行了仿真，并得到了良好的电压电流波形，而且减小了电路的损耗，提高了电路的效率，实现了小型化，绿色化的要求。

Ability to read PCB wiring and principium diagram as plus.

具备PCB接线图，和线路图的阅读能力者优先。

The shrowing equipment is finite element analysisd which is pivotal part in mini Snow-blower.The principium of ergonomics is applied too,the height of handrail can be accommodated. Manipulations get more comfortable.A complete set of banausic structures are brought forward.

设计时充分考虑了各种因素，对其中的关键部件-抛雪轮进行了有限元分析，并应用人机工程学原理，可对扶手高度进行调节，使操作更加舒适方便。

In order to solve some teaching problems of advanced mathematics, the authors of this paper advance whole teaching design, and attempt to expound it s principium with characteristics of mathematics and leaning mentality, then, calculous and part problems are exampled to explain the whole teaching design of advanced mathematics.

为解决高等数学教学存在的问题提出整体教学设计，从数学本身的特点和学生数学学习心理的角度阐述整体教学设计的原理，并以微积分和局部问题为例说明高等数学的整体教学设计。

The main content of Chapter 3 is design of the infrared remote control equips. In this chapter introduce the infrared maser in the car and receiver in the garage gate. Firstly diagrammatize principium.

第三章的主要内容为红外遥控装置的设计，在这一章中对车库门红外遥控装置的车内发射部分和车库门接收部分的原理和具体设计分别进行说明。

Firstly, it introduced the import principium resolving thread and steps of analytic hierarchy process. Secondly, it erected model of population modernization, which based on the steps of analytic hierarchy process. Lastly, it got the maximal eigenvalue of dissymmetric matrix and corresponding eigenvector with SAS, and normalized the eigenvector to get weight value.

本章分为两部分，第一部介绍分析法的提出、原理以及解决问题的思路和步骤；第二部建立模型确定权重，根据层次分析法的原理和步骤，建立人口现代化指标体系的模型，运用SAS求解所构造的非对称判断矩阵的最大特征值，从而得出所对应的特征向量，变形后得到权重。

The second chapter of the thesisinquires into generating principium of society prevision possibilities.In other words, it epistemologically studies and structures out SPpossibilities.

本文第二章，主要是探讨社会预见何以可能的发生机制，或者说是对社会预见何以可能的发生机制进行社会认识论的反思和建构。

The paper presents work principium of hydropneumatic elevating-equilibrium mechanism , and the mathematical model for balance of elevating-equilibrium mechanism was proposed, the design model was solved by using Maximum-minimize Method in MATLAB optimization toolbox and optimum procedure was presented.

对液体气压式高平机的工作原理进行了介绍，建立了高平机的平衡作用数学模型，应用MATLAB优化工具箱中的最大最小化方法对设计模型进行了优化求解，给出了高平机的结构优化程序，计算结果表明该方法是正确和有效的，并且适用于火炮平衡机等类似结构的优化设计中。

Because thedetecting of the metal object is important in both military and civil applications, wefocused on the aim and do lots of measurement of the radiometric characteristic ofseveral objects correlating to the metal detecting and got the datum. We also completedthe inversion algorithm of retrieving the brightness temperature from the measureddatum.2 The radiometer is the apparatus of incepting the MMW radialization and is the key partof all passive MMW detecting and imaging system. Our emphasis of radiometerresearch was on a kind of AC radiometer, we discussed its principium, composing andthe recovery of its distorted output signal. Finally we gave out the design of the ACradiometer.3 The focal plane system is the main passive MMW detecting and imaging system atpresent.

由于对金属目标的探测在军民应用两方面都很重要，因此文中围绕着对金属目标探测这一中心，对几种相关物体的毫米波辐射特性进行了大量测量实验，获得了相关数据，并进行了亮温反演，给出了计算结果。2毫米波辐射计是接收物体毫米波辐射的高灵敏度接收机，是所有被动毫米波探测成像应用的核心部件，因此文中对毫米波辐射计进行了相关研究，重点研究了用于扫描探测的交流辐射计的原理、构成及其失真信号的补偿问题，并完成了一种交流辐射计的系统设计。3毫米波焦平面系统是当前被动毫米波探测成像的主流系统。

Because thedetecting of the metal object is important in both military and civil applications, wefocused on the aim and do lots of measurement of the radiometric characteristic ofseveral objects correlating to the metal detecting and got the datum. We also completedthe inversion algorithm of retrieving the brightness temperature from the measureddatum.2 The radiometer is the apparatus of incepting the MMW radialization and is the key partof all passive MMW detecting and imaging system. Our emphasis of radiometerresearch was on a kind of AC radiometer, we discussed its principium, composing andthe recovery of its distorted output signal. Finally we gave out the design of the ACradiometer.3 The focal plane system is the main passive MMW detecting and imaging system atpresent.

由于对金(来源：ABc1C论文8f8f网www.abclunwen.com)属目标的探测在军民应用两方面都很重要，因此文中围绕着对金属目标探测这一中心，对几种相关物体的毫米波辐射特性进行了大量测量实验，获得了相关数据，并进行了亮温反演，给出了计算结果。2毫米波辐射计是接收物体毫米波辐射的高灵敏度接收机，是所有被动毫米波探测成像应用的核心部件，因此文中对毫米波辐射计进行了相关研究，重点研究了用于扫描探测的交流辐射计的原理、构成及其失真信号的补偿问题，并完成了一种交流辐射计的系统设计。3毫米波焦平面系统是当前被动毫米波探测成像的主流系统。

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。