查询词典 difficult problem

The Traveling Salesman Problem is one of the most difficult problems that many scholars all over the world are studying.

"货郎担问题"是不少学者研究的世界难题之一。

But, because of peculiar demand of some industrial products to metal package barrel , the tubbing technology, existence still is burning being deficient in the sum technology difficult problem.

但因为有些工业产品对金属包装桶的特殊要求，制桶技术仍然存在着欠缺和技术难题。

Where to turn the corner is a difficult problem.

在哪儿拐弯是一个难题。

So long as unceasingly working hard, you will solve with the difficult problem sooner or later.

只要你不断努力，你迟早会解决这个难题的。

Based on variation principle, a free vibration variation-integration equation of cantilever curved pipe for conveying fluid is derived. This is a bending-torsion-fluid tree phase coupled dynamics problem. It is difficult to uncouple and to obtain bending and torsion analytic solution separately. We can only look for approximate solution or numeral results.

根据变分原理导出了悬臂输液曲管的变分－积分方程，这是弯曲－扭转－流体三相藕合的动力学问题，无法解藕而单独求出弯曲和扭转的解析解，只能作近似计算。

It is difficult to get better performance in document clustering due to too many undiscriminating terms. In our study, we propose the mechanism of summary to solve the problem about too many undiscriminating terms.

不过，在使用向量空间模型时，通常会伴随著过多的杂讯，使得最后文件群集的成效被影响。

It is an unfathomed and difficult problem that weak and small targets are detected in complicated background and low SNR .

复杂背景下低信噪比弱小目标的自动检测是当今目标自动探测研究尚未解决的一个难题。

It is an unfathomed and difficult problem that weakandsmall targets are detected in complicated background and low SNR .

摘要复杂背景下低信噪比弱小目标的自动检测是当今目标自动探测研究尚未解决的一个难题。

We can approach the modernity of the economic legal norms by manifesting the basic unit of behavior, legal rule and legal standard, and the system of Economic Law, realize the modernity of the function of Economic Law by revealing it is the guarantee that could overcome the difficult position of modernity and propel the project of modernization, detect the modernity of operation of Economic Law by inspecting its legislature, enforcement and judicature. Lastly, the author assumes that the problem of the legitimacy of Economic Law should be resolved by realizing substantive legitimacy of Economic Law in its operation.

书中指出，经济法本质的现代性体现为经济法是实质合理性与形式合理性相统一的法；经济法律规范结构的现代性体现为微观层面的"原子"行为单位的现代性、中观层面的"规则"和"标准"的现代性以及宏观层面的经济法律体系的现代性；经济法功能的现代性体现为经济法是克服现代性困境的制度保障或推进现代化事业的制度保障；经济法运行的现代性体现在作为求解经济社会问题之"新法"的经济立法、作为一种现代社会的"新的管理方式"的经济执法和以"目的指向"裁判方式为特征的经济司法上；而经济法在经济立法、经济执法和经济司法中出现的合法性问题其实就是经济法运行中的现代性问题，该问题的解决得益于经济法运行中实质合法性的实现。

Combing these expressions with the orthogonal invariance of the Frobenius norm, we overcome the key difficult for the matrix unitary approximation successfully, and obtain the expression of the solution of Problem I.

本文分别利用多种矩阵分解相结合的直接方法和具有短递推格式的迭代方法得到了问题Ⅰ的解，其主要研究成果如下： 1。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。