查询词典 difficult problem

Another problem is that the ball suddenly changes direction – going from you towards the opponent and then back to you. This sudden change of direction makes it difficult to track the ball and you can "lose" it for a split second.

另一个问题是球突然改变了方向—球刚被你击向对手有立即回来了，方向的突然改变使跟踪球的飞行轨迹并得困难而你很可能在瞬间将其看"丢"了。

Stock market is a complicated non-linear dynamic system. It is very difficult to open out it's inherent rules using traditionary timing prediction technique. First, I will develop a new method, which is upon the support vector machine, to solve the problem in the aspect of forecasting the stock price.

股票市场是一个复杂的非线性动态系统，利用传统的时间序列预测技术很难揭示其内在的规律，为了更好的对股票市场的价格规律进行分析，本文在支持向量机理论的基础上推导新的方法来适合股票价格预测的应用。

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。

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。

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。

Pond ecosystem is a complicated system with the characteristic of dynamic state, multiple factor and unrepresentative. It was difficult to give out results for cultivation problem via single factor statistic traditionally.

池塘生态系统是一个动态、多因素、非典型的复杂系统，用单因素统计法难以研究池塘养殖中的生态问题。

In the face of a difficult time, I will be with a smile on the face, will be unswerving efforts to solve the problem.

在遇到困难的时候，我都会以微笑对面对，都会坚持不懈努力去解决。

But its file is bulky and the interaction is weak, so it is difficult to transfer on the web. VRML provides a brand-new thought or method to resolve the problem.

但其存在文件大、交互性差、不便于网上传输的缺点，VRML对解决该存在的问题提供了一种崭新的思路和方法。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。