查询词典 a class of

A class of undergraduates at the Massachusetts Institute of Technology has created a set of robots that can water, harvest and pollinate cherry tomato plants.

麻省理工的一个在校生发明了一种机器人，他可以浇水，首个和给西红柿樱桃授粉。

Meanwhile, it could be seen that there does not exist a confidence interval with width less than 0.5 because of the property of Poisson distribution. Based on these conditions, the author mainly carried out research into two aspects of this problem as follows. Firstly, by numerical and theoretical analysis, the author compares some existent confidence intervals, for example,"exact" confidence interval, Wald confidence interval and Bayesian confidence interval, and finds some deficiencies points of the confidence intervals, whose modification version has been proposed .Also, several better confidence intervals such asare also presented .Secondly, for given confidence coefficient and interval width, the author constructs a class of asymptotical two-stage interval estimate procedures. At the same time, under varies restriction of confidence coefflcientent interval width, the optional sample size of the first stage has been computed by numerical computation. The numerical computation shows that the method considered in this dissertation have good properties and applied value.

同时，由于Poisson分布的特性，我们知道不存在其参数区间长度小于0.5的置信区间，基于这些情况，我们主要展开了以下两个方面的研究：一是利用数值计算分析与理论分析的方法对现有的若干置信区间如"精确"置信区间，Wald置信区间，Bayes置信区间等进行分析比较，发现了一些缺陷，针对这些缺陷，我们进行适当的修正，并得到几种性质较好的置信区间如：修正大样本区间Jeffreys原则下置信区间二是针对已给定的置信系数与区间长度，我们提出了一种渐近的两阶段区间估计程序，并利用数值计算的方法，在各种置信系数与区间长度限定下，算出了最优的第一阶段观测次数，大量数据表明，本文考虑的方法性态良好，具有应用价值。

Like the Quaestiones, the Courts of Queen''s Bench, Common Pleas, and Exchequer were all theoretical emanations from a higher authority, and each entertained a special class of cases supposed to be committed to it by the fountain of its jurisdiction; but then the Roman Quaestiones were many more than three in number, and it was infinitely less easy to discriminate the acts which fell under the cognisance of each Quaestio, than to distinguish between the provinces of the three Courts in Westminster Hall.

正和"审问处"一样，后座法院（Court of Queen''s Bench）、民事高等法院和理财法院在理论上都是从一个较高的权威分出来的机关，并且每一个机关都分别主管一类特种案件，这类案件被假定是由其管辖权的泉源委托给它的；不过当时罗马"审问处"在数量上远不止三个，如要把分属于每一个"审问处"审判权的各种行为加以区别，远不及把韦斯敏斯德三种法院的范围加以划分那样便当。

This paper discusses a variation equation problem in a class of singular stochastic control with stopping time,gives its solution under two different conditions,which is a one order continuous differentiable and concave function,and gives the exact form.

讨论了一类带停时的奇异型随机控制问题中的一个变分方程问题，并且在两种不同的情况下给出了该变分方程的解，即为一阶连续可导凹函数，并在两种情况下给出了此函数的具体形式。

A class of conjugate descent algorithm with single parameter βk for unconstrained minimization problems is presented and it is proved that this algorithm is of descent feature when it satisfies the condi- tion of a sort of inexact linear searching and, in addition, it is globally convergent.

给出了无约束问题一族含有一个参数βk的共扼下降算法，证明了该共扼下降算法在满足一种非精确线性搜索条件时是下降的，而且是全局收敛的。同时可以看到共扼下降算法是其特例

Quinone: Any member of a class of cyclic organic compound s comprising a six-membered unsaturated ring to which two oxygen atoms are bonded as carbonyl groups (-C=O; see functional group).

醌：在六元不饱和环中，含有两个紧邻的，或被乙烯基撑隔开的羰基的环状有机化合物的统称。

A class of words of one language with the same or a similar system of inflections, such as the first declension in Latin.

词形变化中的一组静词一种语言中的一类词，它们有相同或相似的词形变化系统，如拉丁语的第一词形变化

On the second part, we investigate a decomposition formula of spectrum of a class of m-valued logical functions.

第二部分研究环上逻辑函数的谱分解式及其在多维广义Bent函数构造中的应用。

Appling nonlinear feedback with estimated parameters and state diffeomorphism, Based on the Lyapunov approach we can develop a kind of novel robust controller designed for a class of nonlinear systems with mismatched uncertainty.

针对反馈可线性化系统，利用含估计参数的非线性反馈及状态微分同胚，基于李亚普诺夫方法给出了含非匹配不确定性系统的新型鲁棒控制器的设计方案。

In this paper, a new approach, which is based on simulated annealing algorithm for solving a class of diffusion equation of parameter operator identification of inverse problem, is presented.

文章给出了利用模拟退火算法求解一类扩散方程的参数算子识别反问题的一种新方法。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷