问问题

We give, for any solution of a tree, a clear description on the elements in the solution, by introducing the concept of"Quasi-All-Ones Problem"after analyzing the algorithm created by Galvin to construct a solution to the All-Ones Problem for trees thoroughly.

在对Galvin提出的树的全一问题解的构造算法进行仔细分析后，通过引入"准全一问题"，我们给出了任意树的解的清晰描述，并利用它计算出树的全一问题解的数目，给出了单圈图的全一问题解的两种构造算法。

However, the solutions of the Cauchy problem of the nonlinear hyperbolic system generally develop singularities in finite time even if the initial data are small and smooth.For this reason, solutions must be found in the space of discontinuous functions. Therefore, one can not directly use the classical analytic techniques that predominate in the theory of partial differential equations of other types. Instead, we construct approximate solutions via the singular perturbation methods. By using the compactness of the approximate solutions, we can obtain the existence of the solutions of original system.

然而一般而言，即使是在初值很小且光滑的情况下，非线性双曲型守恒律的Cauchy问题的解在有限时间内也会出现奇异性，为此，我们必须在不连续函数空间中寻找上述问题的解，因此对这类问题的研究，我们也不可能直接利用在其它类型的偏微分方程中占主导地位的解析方法来解决问题，而是通过奇异扰动法构造近似解，由近似解的紧性得到原问题解的存在性。

In the present work,the existence and uniqueness results aboutperiodic boundary value problems for different kinds of the nonlin-ear periodically perturbed nonconservative systems are establishedthrough the discretization technique,under suitable assumptions,by using global inverse function theorem and result about the ex-istence and uniqueness of periodic solution for nonhomogeneouslyfirst order linear periodic boundary value problem.

本文的第一章概述了在讨论原问题解的存在唯一性过程中以及构造和分析相关的数值求解方法时将要用到的全局反函数定理、有关矩阵特征值的若干重要引理、线性常微分方程非齐次周期问题解的存在唯一性定理和单参数影射方法及有关结论，并简单回顾了已有的证明非线性微分方程周期边值问题解的存在唯一性的方法，其中包括谱理论、最大最小化形式方法、摄动技术和全局反函数理论方法，最后，介绍了两类数值求解非线性微分方程问题的方法。

Here mainly introduces five natures of the initial value problems, In several aspects summed up as the following : whether there are solutions to the problems, whether the only solution, the existence of solutions interval extent; Initial issues under what conditions have a solution--Cauchy - Piano existence theorem; how the district between the definition of a solution to open up a larger interval up; initial value problems for the sole condition --- Lipschitz conditions; 3、the numerical solution of the initial value problems of Ordinary Differential equations .

在这里主要介绍了初值问题的5个方面的性质，分别在这几个方面中总结了以下内容：初值问题是否有解，解是否惟1，解的存在区间有多大；初值问题在什么条件下有解----柯西-皮亚诺存在定理；怎样把在小区间上有定义的解开拓到较大的区间上去；初值问题解的惟1性条件---李普希茨条件；3：常微分方程初值问题的数值解法。

WB sXs0 But what is ultimately most important here is that you are asking the question — not just of me but of yourselves.

但是我在这儿说的最重要的是：你们在问那些问题——不仅是问我，而是在问你们自己。

Created in 1991, the brand of Dazzle originates from the manufacturing of popular and handmade single piece under the performance of acuminous vogue feelers.

因衣服价格便宜，少不了有MM问衣服品牌的真假，请MM们不要问是真是假，本店不卖假货，问者不再回答这个问题。

While a rare interviewer may ask these questions simply to watch you squirm ,however,many wild-card questions serve a purpose.

很少有面试官问这些问题仅仅是想让你尴尬，但是很多不可预知的问题都是为了特定的目的才问的。

While a rare interviewer may ask these questions simply to watch you squirm,many wild-card questions serve a purpose.

很少有面试官问这些问题仅仅是想让你尴尬，但是很多不可预知的问题都是为了特定的目的才问的。

There are books written on brainteasers in the interview, consultants who will help your company annoy the hell out candidates with your very own custom brainteasers, and now, everyone from small software firms to big ole' banks are asking stupid riddle questions.

有的人开始著书写怎么问更二B的问题，有的人给企业出谋划策，量身定做二B问题，突然之间，从皮包公司到知名企业全他妈的问起二B面试大猜迷了。

According to the perturbation method, we also studied stability of the non-convex quadratic programming problem, defined by Tikhonov, A.N.

其次，我们研究的问题可视为Bar-On 与Grasse (1993，1997)问题的条件放松，因此我们可利用Bar-On 与Grasse 方法求得的解来逼近我们研究问题的解，然这就涉及到参数对问题解的连续性，我们期望能以扰动法来回答这「规划问题稳定性」的问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。