查询词典 exact

The theoretical basis of the proposed"circular arc bending model" is found and the exact form of the model is alsoderived.

与以前发表过的相关理论、数值和实验结果作了较为深入的比较。

The exact energy flow pattern on the axis of a circular disk by transient excitation is presented.

摘要本文给出了在瞬态均匀电流分布激励下，圆盘轴线上能量衰减的精确解。

An exact solution of velocity distribution for Couette shear flow in a non circular conduit with axial symmetry section is obtained in this paper.

从N S方程出发，得到了轴对称异型断面管纯剪切流动速度分布的一般解，进而推出了纯剪切流动有限宽度矩形断面管的速度分布和流量计算公式，证明了库特剪切流是有限宽度矩形断面管当宽度趋向无穷大时的一种特例。

This may be due to the decrease in circulating B cells, but the exact reason is unknown.

这可能是由于循环的B细胞减少，但确切原因未知。

They have not yet been well studied, and are here treated provisionally as different species, although future research is needed to clarify their exact circumscription.

它们沿未被很好地研究，在这里临时处理为不同的种，而需要未来的研究以验证其确切的划分。

The results showed that it was a kind of stable and exact analyzing method in determination high content citric acid.

结果表明该方法稳定可靠，适用于高浓度柠檬酸含量的测定。

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。

Exact and clear positioning is the key which decides whether the news weekly is lively or not.

准确而又明朗的定位，是一份新闻周刊能否有生命力的关键所在。

To be exact, we will learn how to display a bitmap in the client area of our window.

为了更精确，我们将学习如何在我们窗口客户区显示一个位图。

While the exact end result of these environmental changes is not clear, we can expect major climatic changes over the next 80 years.

虽然确切的最终结果，这些环境的变化尚不清楚，我们可以预期的气候变化主要在未来的80年。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。