查询词典 problem on obstacle

Transportation problem as an important part of logistics have played a very important role in corporation's benefit. The transportation problem of open-pit is a very complex transportation system. So transportation problem have been largely researched.

运输问题作为物流的重要组成部分，它直接或间接的影响着企业的经济效益，露天矿的采剥运输问题是一复杂的运输系统，已经受到了人们的广泛关注和研究。

Finally, the thesis investigates the problem of intelligent personalized information recommendation in Internet, which is a kind of problem that there are no exact goal and no problem operator model. A domain oriented and adaptive multi agent system model for information recommendation is presented.

智能化、个性化信息搜索服务的目标是能根据用户的兴趣，向用户推荐其所感兴趣的信息，而用户的兴趣又要求系统通过用户的反馈来逐步感知，因而这类问题有别于前面研究所涉及的问题，是一种属于既无问题操作模型，又无确定目标的问题。

In this paper, two partition models are built to formulate the document collection partition problem from the essence of the problem itself and they can be used as the evaluation criterion of the document collection partition problem.

从文档集合划分问题本身出发，给出了两个划分模型来刻画文档集合划分问题，从而使这两个模型可以作为文档集合划分的有效评价指标。

The biggest problem in China is peasantry problem, and peasants' key problem is the developing direction of rural economics.

中国最大的问题是农民问题，农民的根本问题是农业和农村经济的发展问题。

Firstly, urban space's development course and actuality of space's patterns are reviewed contrastly in the paper abroad and home. Then, existing problems of urban space at present in our country are discussed stressly:"Ten Faulty Expressions in Writing" of urban construction;"the Movement of Beautifying City" in china; the problem of urban characteristic; the problem of reforming of old city; the problem of residential segregation. The above problems' formed reasons and countermeasures are put forward. Then, the example of Xi'an and its existing problems of urban space and several countermeasures are analyzed in the paper. The transformation of three sections realized in the planning thought of urban space is put forward: from "elitism" to "plebeianism"; from mega-urban project design to "daily living space" and from "technology first" to "human-oriented".

论文首先从中西方城市空间形态的演变历程入手，对比分析了国内外的空间形态现状，重点论述了当前我国存在的城市空间问题：城市建设"十大败笔"；中国"城市美化"运动；城市特色问题；旧城改造问题以及空间分异问题，分析了其形成原因并得出了解决途径，然后对西安进行了实例分析，总结出其城市空间存在问题并提出几点对策，接下来提出了城市空间规划理念应实现的三个方向的转变：从"精英主义"向"平民主义"理念转变、从大尺度城市设计向"日常生活空间"营造转变以及从"技术至上"向"以人为本"理念转变。

The multicast routing problem that finding the minimum cost multicast routing tree with many QoS constraints may be formalized to Steiner tree problem in network, which is a NP-complete problem that an algorithm that finds a Steiner tree can not get the best solution in polynomial time.

寻找有多个QoS约束的最小代价组播路由树可以形式化为网络中的Steiner树问题，它是一个NP完全问题，在多项式时间内不能得到最优解，因此研究者所寻求的是一种次优的、在最差情况和平均情况下的性能都接近于最优的解决方案。

The event-tree based modeling and optimization algorithms are adopted and the whole problem is divided into two sub problems (the portside sub problem and the refinery sub problem).Thus, the algorithm is proposed by analyzing the solving sequence of the two sub problems.

该方法把原油混输调度问题分解为码头调度子问题和厂区调度子问题，采用基于事件树的建模方法，并根据两个子问题的求解顺序提出了原油混输调度问题的分布式并行算法。

Arrival of information age require people learn study of independence, on the basis of to is it is it set up on a complicated one , meaningful problem among the situation learning to mean to learn independently issue, is it on positive angle of person who solves problem , is it is it reflect student true world situation bad to construct the question to face to go directly to put, through solving the complicated practical problem , train students' question to ask the tactics of solving , develop the basic discipline knowledge foundation and basic skill at the same time .

信息时代的到来要求人们学会自主性的学习，基于问题的学习是自主学习的一种，它是把学习设置于复杂的、有意义的问题情境中，将学生置于积极的问题解决者的角度，直接去面对反映真实世界情境的劣构问题，通过解决复杂的实际问题，培养学生的问题求解策略，同时发展基本的学科知识基础和基本技能。

In this paper we discuss the applications of weighted graph from three aspects including the shortest path problem,Chinese postmen problem,and match problem .

本文选取了赋权图应用的三个方面进行讨论，分别是最短路问题、中国邮递员问题和匹配问题的应用。

The primal problem is split into two parts: a master problem and several subproblems. With the information communication between these two parts, we can finally get the optimal solution of the primal problem.

利用Kuhn-Tuck条件，我们把原问题分解为一个高级问题和若干个相互独立的低级子问题，通过高级问题和低级子问题之间的信息传递，最终可以得到原问题的最优解。

You think you're a big shot.

你认为你是一个大人物？

All states are equal, and none can receive special treatment from the federal government.

所有的州都是平等的，任何州都不能获得联邦政府的特别待遇。