查询词典 difficult problem

A fact that does not dispute is, in recent years, on the net " evil do ", on the piracy on the bilk on net chromatically affection, net, net, net the as one falls such as the holiday is built on calumniatory, net, kill in already becoming public numerous life greatly --" net heart " be short of break become a very real difficult problem.

一个不争的事实是，近年来，网上"恶搞"、网上色情、网上诈骗、网上剽窃、网上诽谤、网上造假等此起彼伏，已成了公众生活中的一大害——"网德"缺失成为一个很现实的难题。

We prove that in the decision-making bilinear Diffie-Hellman problem difficult to resolve under the assumption that the new proposal for adaptive chosen ciphertext attack is safe.

我们证明了在决策双线性Diffie- Hellman问题难解的假设下，新提出的方案对自适应选择密文攻击是安全的。

Circular arc recognition is a difficult problem that is not entirely solved in engineering drawing recognition and understanding research field.

在工程图纸计算机输入识别和理解系统中，圆和圆弧的识别转换是一个尚未彻底解决的难题。

ZL03 2 354312.The innovations include: automatic self-closing and reliably sealed valve structure: the design of duplex valve clack with pilot valve to tackle the problem of reverse seal structured valve being difficult to be opened; an automatic drain control device to automatically drain the remaining water from the hydrant; protective plate provided between the hydrant body and the valve block to serve as a connection between the hydrant body and the valve block, which is the first one to be damaged when the ground hydrant is clashed, and prevent pulling-off of the whole above-ground part of the fire hydrant, so as to properly protect the main parts from any damage. The self-closing and reliably sealed valve now prevents drain of water, and only the damaged protective plate is needed to be replaced before immediate re-operation. Thus the repair work after clashing is very easy and simple.

其创新点为：具有能自动关闭并可靠密封的阀门结构：采用有先导阀复式结构阀瓣设计，解决反向密封结构阀门开启沉重费力的难题；设计自控排水装置，能自动排除栓体内余水；在栓体和阀体之间设计撞裂板，它既起到连接栓体和阀体的中介作用，又可在地上消火栓被撞击时率先破裂毁坏，并使露出地面的栓体不见整体脱落，有效保护各主体部件的完好无损，而此时阀门的自闭式结构可靠密封阀门阻止水源外泄，修复时只需更换损坏的撞裂板即可立即复位投入使用，使被撞后的修复工作变得十分轻松简便。

Wolfgang Amadeus Mozart (1756~1791) is a well-known exponent of a golden era of the Classicalism, and his piano work is recognized as the most difficult performance in all of the composers. The main problem is to grasp the style correctly.

内容提要：莫扎特是古典主义全盛时期的代表人物，他的钢琴作品被公认是几乎所有作曲家的作品之中最难弹的，而这主要体现在对其作品风格的正确把握上。

It is difficult to design a good classifier for practical recognition problem.

对于实际的识别问题，设计一个性能很好的分类器是比较困难的。

Beijing is known as " the clinking classic that city plans ", however, pace of construction of Beijing city development is too fast, stayed a series of difficult problem.

北京被誉为"都市计划的无比杰作"，然而，北京城市开发建设步伐太快，留下了一系列的难题。

But distilling tower temperature control is a typic big time-lag system, and the control of it is always a difficult problem in coak producing industry.

但由于氨塔温度控制属于典型的大时滞系统，对这种系统的自动控制一直是焦化生产控制中的一个难题。

It is difficult for a variety of traditionary methods based grads information to solve the constrained optimization problem with non-differential coefficient,multi-modal,nonconve and non-linear functions.

在现实生活中许多实际问题都可以转化为约束优化问题，并且实际问题通常都很复杂，其函数形态各具特色，传统基于梯度信息的各种求解策略对于具有不可微、多峰及非凸的非线性函数约束优化问题很难凑效。

Now I'm in collage,it became to be a more difficult problem.

现在上了大学是个更难的确问题。

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。