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On the basis of analyzing detailedly the correlative conclusions of the extreme value problem of two variable Function , this paper extends the essential condition and sufficient condition to multi-variable function by using the Taylor Formula 、Quadratic Form 、Hesse Matrix and so on,and gives a method to judge the extreme value of point whose vice-derivative doesn't exist by utilizing Lagranges theorem ,so that compensates for the blank above ,which turns idea that solve the extreme value of multi-variable function problem one by one into realities.

摘要本文在对二元函数极值问题的相关结论进行分析的基础上，用泰勒公式、二次型、海赛矩阵作为工具，将二元函数极值的必要条件和充分条件推广到多元函数的情形，而且还利用拉格朗日中值定理找到了一个判别不可导点处极值的方法，从而弥补了多元函数不可导点处极值无法判断的空缺。因而，使得用穷举判断的方法来解决多元函数的极值问题这一思路成为现实。

The touch condition of the first and second interlayer have greater influence to the tension stress of the bottom layer.The first interlayer has fatefully influence to the shear stress, while the touch condition of the third interlayer affects the compression strain of the top of ground.

基于以上考虑，面层与半刚性基层、高强度的半刚性基层与低强度半刚性底基层、底基层与土基的3个接触面是半刚性路面结构的最薄弱的地方，分别定义为第一、第二、第三接触面。

Portable product is in dormancy condition inside most time, now and then move, the manufacturer can be through letting processor and other circuit inside most time the dormancy condition that is in feebleminded bad news, they let turn into specific power consumption when need higher high-powered position; The operation pattern of cereal song server differs completely: They complete right amount work inside most time, also need full load to move sometimes, but be in dormancy mode rarely.

便携式产品在大多数时间内处于休眠状态，只偶然运行一下，厂商可以通过让处理器和其它电路在大多数时间内处于低能耗的休眠状态，在需要时让它们转入能耗较高的高性能状态；谷歌服务器的运行模式则完全不同：它们在大多数时间内完成适量的工作，有时也需要全负荷运行，但很少处于休眠模式。

The filter and amplify circuit is designed to test the motors working condition and insure the normal working condition.

实现了滤波放大部分的硬件电路设计和软件编写，以检测天线部分是否正常工作。

Competitors shall be in a physical condition to safely finish the Race, and not suffering from any medical condition that is likely to prevent the competitor from finishing the Race.

同时，她/他的身体状况能安全地完成赛事，以及不受任何药物影响以至不能完成比赛。

In the first chapter , we consider the law of iterated logarithm with finite partial sum. Under certain condition ,we extend the law of iterated logarithm with finite partial sum for the Wiener process to Gaussian process ; In addition, we apply the law of iterated logarithm of Chung to the finite partial sum condition.

第一章考虑有限项部分和的重对数律，在一定条件下，将 Wiener过程下有限项部分和的重对数律推广到高斯过程中，得到高斯过程下的有限项部分和的重对数律；另外，将Chung氏重对数律进一步推广到有限项部分和的情形下。

First, under the given boundary condition and reasonable simplified condition, this paper develops radiation transmitting equations in atmosphere applied in infrared waveband and visual light waveband from common equation of radiation transmitting.

本文采用了2002年1月、2月、7月、8月每日8时至16时的GMS-5卫星云图资料以及相同时次的漠河和郑州两个辐射站的地面净辐射资料。

Studied present measuring methods" advantages and disadvantages, and presented the necessity and importance of researching propellant transient heat transfer.2.according to 130 and aeronautic 90 rocket projectiles" structure, analysed and acquired physical and mathematical models for propellant transient heat transfer, also designed propellant temperature field simulation units for test.3.acquired discrete transient heat balance equation and temperature calculation program, and gave contrasting curves between experimental temperature values and program calculating temperature values as well as maximum errors and average square root errors between them.4.by programs based on the first class boundary condition, worked out temperature distribution in propellant temperature field simulation units at different time, analysed temperature field distribution law and main elements affecting heat transfer, acquired propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.5.established transient heat transfer mathematical model and temperature calculation program for the third class boundary condition, drew contrasting curves between temperature experimental values and calculation values and gave maximum errors and average square root errors between them, got temperature distribution in the simulation unit at different time and main elements affecting heat conduction, figured out propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.

分析了现有测试方法的优缺点，提出了研究推进剂瞬态导热的必要性和重要性。 2。根据130和航90两种火箭弹的结构，分析得到了推进剂传热的物理模型和数学模型，设计了推进剂温度场模拟实验装置。 3。得到了离散形式的瞬态热平衡方程和温度场计算程序，给出了实验温度与程序计算温度值的对比曲线及其最大偏差与均方差。 4。利用程序求出了第一类边界条件下、不同时刻推进剂温度场模拟装置中的温度分布，分析了温度场的分布规律和影响传热的主要因素，求出了推进剂质量加权平均温度和最大肉厚1／2处的温度时间曲线并给出了两者之间的最大偏差与均方差。 5。建立了第三类边界条件下的瞬态导热数学模型和温度计算程序，求出了温度实测值与计算值的对比曲线并给出了两者之间的最大偏差与均方差，得到了不同时刻温度场模拟装置的温度分布与影响导热的主要因素，求出了推进剂质量加权平均温度和最大肉厚1／2处温度及两者之间的最大偏差与均方差，讨论并确定了能代表130和航90推进剂温度的特征点的位置。

Decrease of put content i~ the beneficial condition of Chinese cabbage flower bud initiation, and OL 7ie other hand, increasing of put content is the beneficial condition of flower stalk initiation.

高水平 的多胺对大白菜、小白菜和芜菁的花芽和花茎分化有促进作用，而且spd对成花的影响比其它多胺类物质更具有直接性，它的变化与多胺总量的变化规律相似。put含量的降低有利于大白菜花芽分化的起始，含量的增加有利于大白菜的花茎发育。

An astaxanthin overproducing strain was obtained by mutagenesis. in 200l common stirring fomenter, 60mg/l - 70mg/l astaxanthin were harvested by fed-batch cultivation of phaffia rhodozyma. results of optimization of extract condition indicated astaxanthin productivity was 1.14mg/g by acid methods under optimal condition. this achievement reached to the leading level of the field in china, and also advanced method internationally. in the same time, it is a good basis for the further research for the fermentation of natural astaxanthin.

分离选育出虾青素高产的海洋红酵母，在200l中试罐中发酵虾青素，虾青素的产率达60-75mg/l发酵液；对天然虾青素的无毒提取技术进行研究，虾青素的提取得率为1.14 mg/g干菌体；虾青素发酵水平和提取技术水平为国际先进，国内领先，为用发酵法生产天然虾青素打下坚实的基础。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。