压出

Objective To introduce an equipment of low-pressure control which is based on PIC16F877 microprocessor. The design flow and implementation methods are described.

目的：介绍一种基于PIC16F877单片机的负压吸引装置，给出了装置的设计流程与具体实现方法。

ABSTRACT: This paper puts forward a multi-output-voltage's design on the basis of a magnetic amplifier, and we design a novel practical valued switching power according to the theory.

本文提出了一种基于磁放大器的多输出开关稳压电源设计方法，据此设计出了具有实用价值的新型开关电源。

The main body of a book have analysed a generator losing the magnetism physics process , have given a generator out the fundamental equation losing the magnetism queen; By using simulated module of electric system in Matlab/Simulink,build a single infinity system emulation model , have included module such as generator , excitation system , transformer , idle work power source , circuit loads , infinity system , transmission line; Lose magnetism condition two kinds specifically for the excitation winding loses magnetism and the part completely losing magnetism, lower emulation having carried out different working condition, have gained machine holding stater voltage , have encouraged the magnetoelectricity stream , excitation voltage and output having performed meritorious service power wave form change condition; By simulated wave form of contrast , to every electricity amounts, change law has carried out theoretical analysis.

本文分析了发电机失磁的物理过程，给出了发电机失磁后的基本方程；通过使用Matlab/Simulink中的电力系统仿真模块，建立一个单机无穷大系统仿真模型，包括了发电机、励磁系统、变压器、无功电源、线路负载、无穷大系统、输电线路等模块；针对励磁绕组完全失磁和部分失磁两种失磁情况，进行了不同工况下的仿真，获得了机端定子电压、励磁电流、励磁电压和输出有功功率波形的变化情况；通过对比仿真波形，对各电气量变化规律进行了理论分析。

Therefore, the early use of low-permeability reservoir development Diamond Anti-9:00 Well, diamond crack parallel to the main diagonal directions along the crack edge wells to increase water efficiency by the degree of widening further suppress the injection wells, well away from the row Kadoi premature flooded, and the overall benefit of fracturing; in the latter part of the diamond-shaped anti-9:00 Well Well turn the corner to form staggered rows like water injection means, thereby maintaining a high production rate and phase out the extent of mining.

因此，低渗透油藏开发初期使用菱形反九点井网，菱形主对角线平行裂缝方向，沿裂缝注水增加边井受效程度，拉大的井距又可抑制注水井排的角井过早水淹，且利于整体压裂改造；中后期将菱形反九点井网的角井转注形成交错排状注水方式，从而保持较高的采油速度和阶段采出程度。

The thesis is based on the architecture of All-Digital Frequency and Phase Synthesizer (All-Digital PLL) which is published by Hugh Mair and Liming Xiu. The architecture makes multiple signals of the same frequency and the same phase difference the output of a voltage-control-oscillator to be the internal input of the DCO (flying-adder architecture), and we utilize the control word to decide the desired synchronized output signal.

中文摘要本论文是以Hugh Mair及Liming Xiu所提出之全数位频率与相位合成器架构(All-Digital PLL)为基础来做改良设计，此架构是以多个压控振荡器输出的相同频率及相同相位差的讯号，做为DCO(flying-adder architecture)的内部输出讯号，再以控制位元决定出所欲同步讯号。

In order to get the stress analytic solution, the stress equations are deduced with conformal mapping method and residue theorem, the defaults of equations in the reference are corrected. This method overthrows the obstacle in the engineering stress calculation for the flat receptacle with conformal mapping.

为了建立有实际意义的扁挤压筒应力解析解，本文结合单连体复变函数保角映射法和留数定理推导出受内压力作用的扁挤压筒的应力求解公式，更正了国外文献中相应公式的错误，开发了受内压扁挤压筒的应力计算程序，实现了应力计算的程序化。

Based on the properties of miniature PSA oxygen production and a linear driving force approximation, a mathematical model for PSA processes of a Special Miniature Oxygen Concentrator is developed in this paper. The boundary and initial conditions for the model are analyzed and determined, and the finite difference method is applied to solve the partial differential equations.

基于微型变压吸附氧氮分离过程的特点和线性推动力模型，建立了描述该过程的数学模型，给出了求解的边界条件和初始条件，采用有限差分法对模型进行了求解。

Then it is selected including the volume of arch dam, the safety factor of stability, and maximal and minimal principle stress (maximal tensile stress and compression stress).

然后挑选出坝体体积，稳定安全系数，最大和最小主应力（即最大拉应力和最大压应力）。

The dynamic characteristics of stochastic truss structures and stochastic frame structures are analyzed by using Random Factor Method. Then, from the expressions of structural random response of the frequency domain, the computational expressions of the mean value, variance and variation coefficient of the mean square value of the structural displacement and stress response under the stationary random excitation or non-stationary random excitation are developed by means of the random variable's functional moment method and the algebra synthesis method.

考虑压电智能桁架结构物理参数、几何参数、结构阻尼和外荷载、闭环系统控制电压分别或同时为随机变量，构建了结构在随机力作用下的动力响应分析模型，提出了求解方法，推导出结构动力响应随机变量的数字特征计算表达式，通过算例验证了所建模型和所提求解方法的正确性和有效性。

During December 1st 2006 to May 30th 2007, data collection was conducted by the semi-structural in-depth interviews and questionnaires of Pittsburg Sleep Quality Index, social support scale and Parental Stress Index to repeatedly measure 14 primipara and multipara in three time periods: the first week after the birth, the first week after the infant is transferred out, and the first week after they go home.

於2006年12月1日至2007年5月30日期间，分别在早产儿出生一周、转出加护病房一周以及返家后一周，以匹兹堡睡眠品质量表、社会支持量表、亲职压力量表，重复追踪14位初经产妇并进行半结构式深度访谈，以更深入了解早产儿母亲之睡眠品质及其影响因素，研究对象有效答覆率为93.33％。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。