查询词典 bounds

This a obtains method maximum separation ratio to separate two classes instances via a single hypersphere and also provides the facility to control the upper bounds of two classes error rates respectively with two parameters. As such, the performance of classification and prediction of imbalanced data sets can be improved, and the range of selection of parameters can be greatly narrowed.

该方法通过一个超球面将两类数据以最大分离比率分离，并且引入两个参数来分别控制两类错分率的上界，不仅提高了不平衡数据集的分类和预测的性能，而且大大缩小了参数的选择范围。

When heart bounds with vigour, and the eye sparkles with spirit, it is with difficulty, that we are taught to conceive the imbecility that every hour is bringing upon us No.48

当内心欢快地跳动，眼睛闪耀着光亮的神采时，很难劝人相信，带给我们的这些美好时光是荒唐愚昧的。

I do not mean 'thinking' in snatches, or holding petty opinions on this subject and on that. I mean thought on significant questions which lie outside the bounds of your narrow personal welfare.

我对思考的定义不是指攫取，也不是指在某件事上拥有这样那样的无关紧要的意见，而是指的考虑那些有意义的重要问题，考虑那些能够跳出小我个人利益之外的问题。

It gives the reasons for strengtheningStandardized Education and the right way to understand moral standards declining and the necessity inbreaking the bounds of different subjects.

这里提出了强化规范教育的理由，以及如何正确理解道德失范和要走出学科间的局限的必要性。

According to this understanding, this thesis tries to modify PSO algorithm in order to improve its quality of solutions. The main approches include: using uniform design to ensure the uniform distribution of initial particles in the design space; adding mutation operation to increase the diversity of particles; decreasing the maximum velocity limitation and the velocity inertia automatically to balance the local and the global search efforts; developing a new approach to treat the design variables exceeding the bounds; using extensive local searches to escape local minimum. The overall effect of these approaches can yield better results for most test problems.

有鉴於此，本文针对粒子群演化法之流程参考相关文献并稍作改变，使得粒子群演算法在结果的收敛上更具优势，本文的主要改进的方法包括：应用均匀设计的概念使得初始的粒子可以更均匀地分布在空间上；利用突变增加粒子之间的差异性与多样性；利用适当控制的最大速度限制及惯性权重控制，达到区域搜寻与全域搜寻的效果；应用新的边界处理机制处理设计变数超过上、下限的问题；利用区域强化搜寻针对粒子附近地区，再作进一步的搜索以得到更佳之结果；将各种方法综合后配合粒子群演算法使用，可以得到不错的结果。

This dissertation studies perturbation bounds of infinite dimensional operatorsand operator equations.We obtained the following main results.

本文讨论了Hilbert空间和Banach空间上线形有界算子和算子方程的扰动理论，得到了一系列结果。

There would seem to be no bounds to the ingeniousness of an expert whose field of expertise is either on the wane or overcrowded.

对一个创造力非凡的专家而言，不管他的领域是逐步冷门还是愈渐热门，他都没有什么障碍。

The former is inpractical because it′s inefficient in computing and time consuming and the latter makes the failure probability bounds become wider.

前者因计算量大，耗时多不便实用，后者使结构体系失效率的上、下界限进一步变宽。

The main contents of the dissertation are itemized as follows:(1) Proposing a new kind of interestingness measure of correlation named All-item-confidence. This measure has perfect characters for measuring item-item correlation of pattern, for example: the proper upper and lower bounds, a good anti-monotone and so on.

本文的主要研究工作包括以下几个方面：(1)提出了一种新的相关性兴趣度景All-item-confidence，研究了该度量所具有的性质，如：合适的上下界，模式中任意一项的发生均可提高其余项发生的可能性，良好的反单调性等。

In addition, we study the reduced minimum modulus of the generalized Drazin inverse of an operator on a Banach space and give out lower and upper bounds of the reduced minimum modulus of an operator and its generalized Drazin inverse, respectively.

第四章讨论了左乘算子L_A∈BB(H的约化极小模与A的约化极小模的关系；讨论了广义Drazin可逆算子的广义Drazin逆的约化极小模的上下界及广义Drazin可逆算子的广义Drazin逆的约化极小模与算子的约化极小模的关系。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。