定

This systemrealizes the automation of power grid management, fault calculation, the whole process ofcoordination and setting requisition management, and provides the diversiform methods ofmanual interposal to ensure the adaptability and flexibility.

该系统实现了从参数管理、故障计算、保护装置整定计算到定值通知单生成的继电保护整定计算和管理全过程的自动化，并提供了丰富的人工干预手段，满足了通用性和灵活性的要求。

After that according to conclusion of real checkout four surfaces by the curve log mathematics model the peeling optimization mathematics model is set up. Then comparison total solving the key technology and theory problems for the peeling veneer process from the beginning of changer the log centering checkout and the data procession to the final centering optimization process.

随后根据实测原木四个截面检测的结果，根据弯曲原木的数学模型建立起旋切定心优化的数学模型，从而比较完整地解决了旋切原木从上木、定心检测、数据坐标转换处理到优化定心过程中的主要关键理论、工艺问题。

The point of zero net charge for the meadow brown soil in northeast of China with structural negative charges was measured by three methods: potentiometric titration, mass titration and inert electrolyte titration, showing that for the meadow brown soil which possesses structural negative charges, a PZNC independent of electrolyte concentration exists, and the values of pHPZNC obtained by the above three methods are 2.9, 5.0 and 3.3, respectively.

分别采用电势滴定法，质量滴定法和惰性电解质滴定法测定了荷结构负电荷的东北草甸棕壤的零净电荷点，研究表明荷结构负电荷的土壤依然存在与电解质浓度无关的零净电荷点，三种方法的实验结果分别为2.9， 5.0和3.3。

The thermodynamic equation of state and a p V T equation for liquids were used to develop improved methods for calculating the internal pressure and the molar heat capacity at constant volume of liquids.

为获得液体内压和摩尔定容热容的准确数据，以热力学状态方程和一个液体的 p-V-T方程为基础，提出了液体内压的计算方法以及如何由液体的摩尔定压热容推算摩尔定容热容。

A review was presented, starting with the concept of root colonization and colonization ability of Rhizobium, and their effects on competitive nodulation of Rhizobium.

本文从根部定殖概念及根瘤菌在土壤中的定殖能力对其竞争结瘤能力的影响着手，介绍了根瘤菌根部定殖的研究概况。

Flat plate steady mathematical model and non steady symmetric model are presented, the analytical solution of temperature of powder is derived on the basis of non steady symmetric model in spheroidal coordinates with the methods of mathematical transformation and principle of superposition .

对点火问题进行研究，给出了两种点火的数学模型；平板定常模型和球对称非定常模型。从火药颗粒的球对称非定常模型出发，利用叠加原理和数学变换导出了火药颗粒表面温度的分析解。该研究对深入研究点火理论和起始弹道学有一定的作

The effects of variable properties on flow and heat transfer were also studied. 1. SIMPLEC algorithm was used to simulate the laminar natural convection flow in horizontal concentric annuli with the assumption of constant properties. Numerical studies range are as follows: Ra〓 number 100～10〓, radius ratio 1. 2～10.Velocity and temperature distribution profile and the heat transfer result were derived. The comparison of heat transfer results under the boundary condition of constant heat flux and constant wall temperature was also made.

对水平同心套管内层流自然对流采用SIMPLEC算法进行了数值模拟，在〓，半径比1.2～10范围内使用定物性假设进行了计算，得到有关温度和速度的分布以及相应的换热结果，并比较了内壁面分别处于定热流和定壁温条件下换热结果的差异，根据换热计算的结果整理并拟合有关的换热关联式。

This thesis is divided into six parts. The first chapter is preface, the current status of research in the inverse problems for parabolic partial differential equations is reported; the second chapter is "regularization methods for numerical differentiation and their applications ", in this chapter we investigate many regularization methods from a viewpoint of regularization theory and algorithm, some applications in the inverse problems for parabolic partial differential equations are given; the third chapter is "spectral regularization methods". Based on Fourier analysis, within the framework of regularization theory, we apply the spectral methods to some ill-posed problems. Many numerical experiments are done in order to show the validity of the methods; the fourth chapter is devoted to wavelet dual least squares method and a revised wavelet method; in the fifth chapter,we combine finite difference method with method of lines and apply it to the backward heat conduction problem in time; in the sixth chapter "identification problems for unknown source ", the essence and the degree of two problems related to source identification are pointed out, at the same time, some numerical methods are reported.

本文分为六个部分，第一章前言简要分析了国内外抛物型偏微分方程反问题的研究现状；第二章数值微分的正则化及其应用从正则化理论和算法的角度出发，考察了许多正则化方法，还给出了数值微分在抛物型偏微分方程反问题的一些应用；第三章谱正则化方法是在Fourier分析的基础上，在一般正则化理论的框架下，给出了这种方法在各种不适定问题中的应用，数值实验表明谱方法是有效的；第四章研究了小波对偶最小二乘方法和改进的小波方法；第五章主要研究了有限差分方法结合线方法在时间反向热传导问题中的应用；第六章是未知源识别问题，主要指出了两类未知源问题的不适定程度和不适定本质，同时报告了一些数值方法。

Complex formation titration, oxidimetry and precipitation titration were compared.

对配位滴定法，氧化还原滴定法和沉淀滴定法进行了比较。

An integral part of the movement is the quality of the canter strides before and after the pirouette. The strides should show an increased activity and collection before the pirouette and the balance should be maintained at the end of the pirouette.

定后肢回旋之前和之后的跑步，是该动作完整的组合，在定后肢回旋之前的步伐应展现活力增强与收缩，而在定后肢回旋结束时要保持平衡。

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。