正的

By using the theorem on cone expansion and compression and a fixed point theorem on cone,this paper is concerned with the existence of positive solutions for some boundary value problem of singular nonliear semipositive second-order three-point boundary value problem,which improve many known results.

运用锥拉伸与压缩不动点定理研究非线性奇异半正二阶三点边值问题正解的存在性，推广了一些已知的结果。

Relative positive temperature-gradient applicable for China is discussed, it proves that positive temperature-gradient can be expressed as exponential curve.

研究了我国公路桥梁混凝土箱梁的正温度梯度，证明其可以用指数函数来表达，并提出了本桥混凝土箱梁的正温度梯度指数函数表达式。

Potential theory is used to transfer the exterior boundary value problem into the boundary integral equation of the first kind. A iterated Tikhonov regularization and a modified Tikhonov regularization are presented to solve the integral equation.

利用位势理论将外边值问题转化为第一类边界积分方程，再分别利用迭代的Tikhonov正则化方法和改进的Tikhonov正则化方法求解积分方程。

Taking WindowsXP,Microsoft EXCEL and VBA as tools,a series of software system on hydrologic frequency analysis which integrated the ability of graph and calculation was developed.And it contained four kinds of frequency distributions:Γ-distribution,extreme value distribution,normal distribution and logarithmic normal distribution.

以Windows XP，Microsoft EXCEL和VBA为开发环境，研制了一套集绘图与计算于一体的水文频率分析软件，其中包含了常用的Γ分布、极值分布、正态分布和对数正态分布4种频率分布线型。

In this thesis, we use the Min-Max criterion and Parks-McClellan algorithm to design this optimal approximation error of spectrum. Moreover, we give constraint of this optimal spectrum to get the positive spectrum. Then the positive spectrum can be factored by Spectrum Factorization Theorem and can be realized by FIR system.

我们利用最小化最大误差指标，及Parks-McClellan演算法，设计出具有最佳误差的频谱，并对此频谱做限制式上的处理，来得到正数列频谱，并将所得到之正数列频谱利用分解理论做分解，并以FIR系统实现之。

I want to quote from a Tang Dynasty poem to describe what is happening in China," From shore to shore it is wide at high tide, and before fair wind a sail is lifting ."

用一句唐诗表述当今中国："潮平两岸阔，风正一帆悬。"中国的命运正掌握在中国人自己的手中，我们充满信心。

Using the fixed point theorem and degree theory, we give two existence theorems to the system under some conditions.

讨论了一类二、四阶耦合常微分方程组正解的存在性，利用不动点定理和度理论，在一定条件下得到了该方程组正解的两个存在性定理。

A diner, knife and fork upright, elbows on table, ready for a second helping stared towards the foodlift across his stained square of newspaper.

一个就餐者直直地竖起刀叉，双肘倚着桌面，正准备吃下一道菜。他隔着摊在面前的那张污迹斑斑的报纸，正朝着食物升降机那边凝望。

During the inversion of resistivity, special emphases have been placed on two aspects-the estimation of the regularization parameter and the calculation of the Frechet derivative.

在正演与反演过程中，正则化因子的选取和Frechet导数的计算是两项关键内容。

We're living in a country where we have the highest drug death rate, we're living in a country which has one of the highest hep C rates in Europe.

我们正生活在一个国家，我们有最高的药物死亡率，我们正生活在一个国家最高的国家之一，丙肝率在欧洲。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。