查询词典 difficult problem

On the other hand, the detection problem, which is one of the most difficult ones encountered in complex distribution parameter system, can be solved by computer vision and image recognition technology in certain cases.

许多生产过程都是高度复杂的动态系统，具有显著的非线性、时变性、空间分布性和不确定性，难以建立精确的数学模型，智能控制便在这种情况下应运而生。

This thesis presents a solution scheme of e-cash system. It focuses on solving some comparatively difficult problems in e-cash system: divisibility problem , and strives to improve the system efficiency.

本文提出一种电子现金安全支付系统的解决方案，主要解决往常电子现金系统中较难解决的问题："可分性"问题，并力求使系统的效率较高。

Lei Ji: Actually about this problem, I thought a lot of, will look from the history, in difficult economic period people thinks more it is how to spend least money, buy the goods with very tall amusement, actually our Dsi is such a kind of entertainment system, above you can use more than 850 kinds of different game, the most important is it has photograph mix like the head inside buy microphone, these are one dog-cheap and the article with recreational very high value.

雷吉：其实关于这个问题，我想了很多，从历史上来看，在艰难的经济时期人们想的更多的是如何花最少的钱，买到娱乐性非常高的物品，其实我们的Dsi就是一种这样的娱乐系统，在上面你可以使用超过850种不同的游戏，最重要的是它有摄像头和内置麦克风，这些都是一个非常便宜且娱乐价值非常高的物品。

Because the condition of current drag force of group piles is more complex than that of single pile, it is difficult to solve the problem in theory.

桩群的水流阻力比单桩的水流阻力要复杂的多，理论上解决桩群水流阻力目前还比较困难。

This means that the dual bandwidth problem is difficult and generally intractable for general graphs.

也就是说：对于一般图来说对偶带宽问题是难于解决的。

To him, how to earn one's living is a difficult problem.

对于他来说，如何谋生成了个大问题。

In order to solve the problem that the multi-velocity sampling is difficult to calculate the broadband correlative processing ectypes, a calculation method based on the anti-confusion chirp Z transform is presentedfor broadband correlative ectype fast Fourier transform in this paper.

针对多速率采样难以实现宽带相关处理副本求解的问题，提出了通过CZT变换求解宽带相关副本FFT的计算方法。

Using the Genetic Algorithm to solve a difficult problem –searching the eigenvalue and the eigenvector of a matrix.

对正矩阵和正对称矩阵的谱半径的下界作了修正。(2)应用遗传算法解决矩阵特征值和特征向量问题。

It is very difficult to write an original program when the solved problems have the complicated boundary or determining conditions, for example the direct problem of Magnetic Resonance Electrical Impedance Tomography.

实际计算中，当偏微分方程定解问题的定义域是复杂几何形状或有复杂定解条件时，直接编写有限元原始程序具有相当难度，例如计算磁共振电阻抗成像技术中的正问题。

But also should see the risk on policy is very big, bilateral conformity also is difficult problem, after all once the electronic mailbox of Yahoo and AOL, instant chatting tool is amalgamative can form forestall force, and the headquarters apart of two companies is very far.

但是也应该看到政策上风险很大，双方的整合也是难题，毕竟雅虎和AOL的电子信箱、即时聊天工具一旦合并会形成垄断力量，并且两家公司的总部相距甚远。

Among which is the mindset, perceptions and moralities of those who accept mini- military tasks for economic gains.

其中最重要的是心态，观念和道德的人谁接受小型军事任务的经济收益。

In time course imaging, activity peaked 2 days after coronary ligation.

在时程成像检测，活性峰值在冠脉结扎后2天。