In this paper, the original problems of dual lin ear programming problem and the attribute of dual problem is inquired into, the distinctions and the internal relations between both is expounded, its important property is demonstrated by a simple and convenient methods .
探讨对偶线性规划的原始问题与对偶问题的属性 ,阐述两者的区别和内在联系 ,用较简便的方法论证其重要性质 ,揭示可行解与目标函数、可行解与最优解的关系 ,指出线性规划问题最优解从约束条件较少的对偶问题寻求为另一较简便之方
By analyzing the problems existing in physical education in-depth and using Einstein s theory about the scientific thinking process,this essay proposes a viewpoint of original problem teaching.
教学实践的结果表明,运用原始问题培养中学生的物理能力是一个行之有效的途径,这在一定意义上为物理教育的改革提供了有益的启示。
The main content of this paper is the practice research of the "Original physical problems" in physics teaching in middle school.
本论文的主要工作是运用原始物理问题培养中学生物理能力的实践研究。
Original physical problems have their special educational functions and values in the teaching of physics.
原始物理问题在物理教育中具有其特殊的教育功能和教育价值,尤其在学生思维过程的训练中有着一般物理习题所不具备的思维诊断功能。
Beyond the usual method,the one dimensional equation was expressed in the form ofa)(a)u f(x,t)t x t x(? ? + ?? ?? ? ??=,which then was introduced by middle varible ??u t ? a ??x u=V(x,t),so that the same solution of initial value problem by the characteristic curve method of the first order equations a f x tt x(? ? +??)=(,) and(? ?u t ?a ??ux)= V(x,t) was abtained.
对一维非齐次波动方程的始值问题在传统的叠加原理、达朗贝尔公式、齐次化原理的方法之外,完全用特征线方法,先将方程表示为a)(a)u f(x,t)t x t x(??+???????=的形式,进而引入中间变量Vu a u=??t???x,得以用一阶方程??tυ+a??υx=f(x,t)及??ut?a??xu=V(x,t)的特征线方法,推导出维该始植问题的与传统方法相同的解。
The paper deals with discrete phenomena in existence and uniqueness of the fourth initial value problem for the following equations: U(xx)-x~2U(tt)+pUt=0, U(x,12βx~2)=0,β>1.
讨论了重特征方程Uxx-x2Utt+pUt=0的第4始值问题。
Original Problem Teaching: The New Horizon of Physical Education Reform;
原始问题教学:物理教育改革的新视域
From Exercises to Initial Questions: A Great Innovation in the Way of Scientific Education;
从习题到原始问题:科学教育方式的重要变革
The Establishment and Research on the Measurement Tools of Primitive Physics Problems;
原始物理问题测量工具：编制与研究
On the Educational Value of Primitive Physics Issues and the Enlightenment to Physics Education;
论原始物理问题的教育价值及其启示
Discussing Manufacture of Non-standard Original Profile Gears;
非标准原始廓形齿轮加工问题的探讨
The characteristics and educational function of primitive physics problems;
论原始物理问题的特性及其教育功能
The Reconsideration on the Seeds of Occurrence and Initiator of Lixue;
理学发生原由及创始人问题的再考察
To start to talk or ask questions.
开始开始讲话或问问题
Research of the Legal Issues about Original Acquisition Institution of Right to Use State-owned Land;
国有土地使用权原始取得制度法律问题研究
Research on Distortion of Initial Data of Financial Accounting Information System;
财会信息系统中原始数据失真问题研究
Comparative Study about prehistory between Srilanka and China.;
中斯两国原始社会比较研究的几个问题
The parametric shortest path problem with its primal-dual algorithm;
含参数的最短路问题及其原始—对偶算法
Some Problems on the Consonant System in Proto-Sino-Tibetan
原始汉藏语辅音系统中的一些问题──关于原始汉藏语音节结构构拟的理论思考之二
The way is always open for the West to come to grips with Russia on the atom
西方就原子问题同俄国认真研究的路子始终是敞开的。
The original copy on disk will be all right, but hours of work can still be lost.
磁盘上的原始数据没有什么问题，但几个小时的工作丢失了。
There is no necessity to take into consideration the basis which the people will need to continue a most primitive existence.
没有必要考虑这个民族维持最原始的生存的基础问题。
On the Logical Occurrence of the Original Aesthetic Conformation --And the Provenance of arts;
论原始审美形态的逻辑发生——兼论艺术的起源问题
The Usufruct of Rural Land to be on the Move and Originality Accumulation Existing in the Course of Economy Systems Evolution;
农村土地使用权流转与经济系统演进过程中的原始积累问题
