查询词典 variations

To compare the image quality of the three sequences in two groups by One-Way ANOVA and T Test. The qualitative assessment standards include clarity, artifacts, signal uniformity, the conspicuity of enhanced vein and the observable grade of intrahepatic venous branchs. The quantitative assessment standards include SNR and CNR of intrahepatic portal vein and hepatic veins. Furthermore, the anatomy and variations of the intrahepatic portal vein and hepatic veins are statistical analysed.

通过方差分析和T检验分别对A、B组三个序列的图像质量进行比较，评定标准包括清晰度、伪影、信号均匀性、静脉强化程度及肝内静脉分支显示级数等定性指标和肝内门静脉、肝静脉的SNR(Signal-Noise Ratio，信噪比)及CNR(Contrast-Noise Ratio，对比度噪声比)等定量指标。

The variations of the leakage constant with structure parameters were given in this study to show the special properties of this kind of antenna.

文中给出了漏波系数随天线结构参数变化的关系以显示该左手介质天线特有的性质。

Firstly, the approach formulates a cost functional to turn the inverse problem into a constrained minimization problem according to least squares criterion, then the resulting constrained minimization problem is transformed into an unconstrained minimization problem by using a penalty function technique, and then the closed Fr chet derivatives of the Lagrange function with respect to the properties are derived based on the calculus of variations, finally, one can solve the resulting problem by using any gradient-based algorithm and the finite-difference time-domain method.

该方法首先以最小二乘准则构造目标函数，将逆问题表示为约束最小化问题；接着应用罚函数法转化为无约束最小化问题；然后基于变分计算导出闭式的拉格朗日函数关于特征参数的Fr chet导数；最后借助梯度算法和时域有限差分法迭代反演德拜模型参数。

The subtle eroticism of the figure leads to many nude variations, some done almost contemporaneously and often attributed to Leonardo himself.

画中隐约的情欲导致了许多裸体版本的产生、有些产生于同一时代，经常被认为是列奥纳多自己所作。

The continuation method plays a very important role in handing load, real power generation variations and voltage stability of electric power systems.

作为电力系统区域间输电能力研究的前提，本文对系统严重故障选择进行了深入的研究，提出了一种快速有效的基于鞍点分叉的故障排序新方法。

In this paper, the effect of life insurance contract is held as the main clue. Questions about the validity and variations in the effect of the life insurance contract have been analyzed in detail. And a research has been given on some special institutions.

本文以人寿保险合同的效力为线索，详细分析了人寿保险合同有效及效力变动的若干问题，对相关的特殊制度进行了初步的探讨，提出了自己的看法。

In his novels, motives and variations are like the contraposition above.

剧本《雅克和他的主人》是其自己唯一承认具有"变奏"性质的文本。

The first movement opens with the cello alone; variations of its expansive main theme and a pair of contrasting secondary ideas give much cause to contrapuntal and melodic interplay between the two players.

第一个乐章以大提琴单独开始；它主调的变奏和一对作对比的副主题造成了两个乐手间的对位和主调交错。

Results show that the convective systems along the shear line exist 3 hours' interval variations.

发现，a。切变线上的对流系统的降雨量有3小时左右的周期变化；b。

To overcome the premature of simple genetic algorithm, the calculating efficiency of SGA is improved by the following two ways; Firstly, in order to ensure convergence of algorithm and reduce influence factor of convergence, elitist selection and adapted crossover and mutation operator are adopted. Secondly, because this study deals with finding minimize volume of structure, to quicken convergence of this problem, in line with mechanics criterion the paper carry out mutation to some genes in chromosome according to variations of internal force. This will let algorithms to search answer with our hoping directions.

针对基本遗传算法存在早熟的问题，本文主要从两个方面进行了改进，首先为了保证算法的收敛和减少影响算法收敛因素，采用了最优保护策略和自适应的交叉和变异算子；其次，由于本文研究内容涉及求结构最小体积问题，为了加快此类问题的收敛速度，本文结合结构优化中的力学准则，对个体染色体中的某一段基因按照内力变化进行变异操作，使得算法按一定方向进行搜索最优解。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。