求值

The homotopy continuation algorithm can solve non-linear equations without initial values,but lots of computation shall be done.Therefore,a new homotopic path-tracking algorithm based on Matlab and its function"\" is proposed using secant-prediction and Newton-correction.

由于同伦延拓算法不需要初始值就能求出非线性方程组的解，但计算量大，为此利用Matlab平台和它里面的函数"\"，采用割线预估和牛顿校正，提出了一种新的路径跟踪算法基于Matlab环境的同伦路径跟踪算法。

This article introduces some new methods,which utilize the own specialties and integral characters in Laplace transform to solve some special types of infinite integral.

这种把判断广义积分的敛散性与求积分的值一起解决的做法存在

In this paper, we present five sorts of methods for finding the particular solutions of the n-th-order inhomogeneous linear differential equation with constant coefficients.

本文给出了五种求n阶常系数线性非齐次微分方程待解的方法。这些方法只需计算特征函数A及其各阶导数在某点的值，方法简单，两种递推公式适合计算饥计算，本文还简化了文［1］中递推公式的证明

Are there ways to measure instantaneous speed directly, or is instantaneous speed always a value that must be derived from average speed measurements?

有没有方法可以直接测量瞬时速度，或者是否瞬时速度总要由平均速度的测量值求导得出？

To solve this problem, an algorithm which can adaptively determine the double thresholds based on gradient histogram and minimum interclass variance and improve Canny operator was proposed. Theory and experiments show that the proposed algorithm is effective and correct.

为了对Canny算子的这一缺陷加以改进，提出了基于梯度幅度直方图和类内方差最小化原理自适应地求取双阈值的算法对大津法作出改进，理论推导和实验结果证明了该算法的正确性和有效性。

The concrete work is as follows:(1) Compare and research two typical algorithms which generate the profile: one is the intersectional generating profile algorithm, the other is the interpolation generating profile algorithm.

具体工作内容如下：(1)比较研究了剖面生成的两种典型算法---求交式剖面生成算法和插值式剖面生成算法。

The amplifier itself consists of a cascade of RC neutralized common-emitter stages each with primary tuned interstage transformer.

放大器由中和了的共发射极级链接而成，级间用初级调谐的变压器耦合，叙述分三个部分：第一部分将中和了的共发射极电路用近似等效电路表示，第二部分分析级间网络，将晶体管放大器的功率增益表示成预给的频率函数后，就能导出各级间网络的谐振频率和Q值等，从而求出线路元件的数值。

An ecology-epidemic model which takes into account the effective contact rate relying on the total number of persons is proposed and the expression of the threshold value R0 is extracted on the invariant subset.

研究了具有依赖于总人数的有效接触率的生态-传染病模型。建立了一个具有依赖于总人数的有效接触率的模型，在模型的不变子集上先求出阈值R0的表达式。

Integral method with 31 types of kinetic function was proposed to define the most probable kinetic function g; the Ozawa、KAS and iterative procedure methods were employed to calculate the activation energy E.

采用积分法结合31种动力学函数来判断亚胺化反应的函数g，由Ozawa、KAS和迭代法求取活化能Ea值。

In this paper,two methods,one singular perturbation and the other directly numerical solution,are used to find the solution of the stiff string of 3lst key and 59th key for a piano tone partials,with the results compared with Ray- leigh and Seeback's by regular persvrcation method and with those from dire- ct obseruation.

本文应用文献[1]结果进一步求出了59号弦的泛音频率，所得结果与实验观测值对比，其绝对误差的均方根和相对误差的均方根都远较Rayleigh-Seeback用正则摄动法算得的小。

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。