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The main problem of sustainable development is the problem of the using and management of natural resource.

可持续发展的首要问题就是自然资源的利用与管理问题。

When is a network diagram for the problem of, or can convert the network diagram problem, can use to illustrate the method to solve.

当给出的问题是一个网络图，或者可以转换成网络图问题时，就可以用图解法来求解。

An ideal logistics problem is considered as a network flow problem consisting of many geographically distributed entities.

一个理想的物流问题是一个网络流问题，它由地理上分布的许多实体组成。

This paper changcs the decoupling judgement problem into a minimum cost network flow problem. The solution algorithm is out-of-kilter . algorithm which is characterized by simple manipaultion, fast and reliable convergence.

本文将这样的高阶系统解耦问题，变换为求网流技术中最小费用流问题，并采用运算简便快速、收敛可靠的OKA法求解。

The optimal models and algorithms for making up pairs and non-pairs locomotive turn-around diagram are given out. Specially, a more efficient way to consider both the optimum and the equilibrium of this problem is also presented as follows: at first formulate the network flow model of this problem and solve it by the method of the minimal cost flow and then use the labeling method to readjust the solution.

对成对和不成对机车周转图编制问题进行了探讨，给出了其最优配置的数学模型和算法；在此基础上，提出了把均衡性与最优化综合考虑的不成对机车周转图的改进算法——首先建立网络流模型用最小费用流算法求得问题的初始最优解，然后用标记法对该解进行调整，使其在最优的基础上达到均衡。

In Chapter 6,the adaptive finite element method for a parabolic problem isextended to the problem with the Neumann boundary as its theoretic supplement.

第六章作为对抛物问题的自适应有限元方法理论上的补充，将其推广到具有Neumann边界条件的抛物问题，得到了相应的后验误差估计。

In the mean time, the discussions in this paper refer to the application of Neumann boundary value problem, the determination of height system and the definition and solution of GPS boundary value problem.

理论上物理大地测量的基本研究方法，已由于GPS技术的出现而发生改变。同时，直观上物理大地测量确定地球几何形状的一系列理论、方法和技术也将逐步由GPS所取代。

Aim at the shortage of vertically additive method by which we can't discuss forced oscillations of systems of partial functional differential equations,we directly use the oscillatory definition,Green's formula and boundary condition of homogeneous Neumann to change the oscillatory problem of solutions to a class of systems of quasilinear parabolic equations of neutral type into the problem of which functional differential inequality haven't eventually positive solution.

针对垂直相加法无法讨论泛函偏微分方程组的强迫振动性的不足，直接利用振动的定义、Green公式以及齐次Neumann边界条件把中立型抛物微分方程组的振动问题转化为泛函微分不等式不存在最终正解的问题，然后利用最终正解的定义及上下极限得到了在齐次Neumann边界条件下判别其所有解振动或全振动的充分条件。

Market problem is a problem with very serious period of new economic policy.

市场问题是新经济政策时期很重要的一个问题。

Chapter4 presentsthe calculation of optimal order quantity of single period inventory system of autonomous recovery problem based on the traditional "news vendor problem". And also analyses an example.

第四章在参考传统的报童问题的基础上，提出了自治复原的库存问题中单周期库存的最佳经济订货量的确定方法，并分析了一个实例。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。