查询词典 stability

Performance on perceptual organization index was more stable than verbal comprehension index and freedom from distractibility index. Stability of the non-verbal scales is better than that of the verbal scales of WISC-Ⅲ. Conclusion: The test-retest stability in the scores of WISC-Ⅲ was found to be reliable.

结果：(1)WISC-Ⅲ智商分数稳定性高，意即学龄孩童智商稳定性高，不同施测时问问隔与诊断类别并不会影响分数的稳定性；(2)WLSC-Ⅲ之知觉组织指数的稳定性较语文理解、专心注意指数高；(3)WLSC-Ⅲ非语文分测验之稳定度较语文分测验高。

The first part presents develops of predator-prey systems and gives the model that is investigated in our paper; Chapter 2 presents the results on boundedness of solutions and permanence of system; In chapter 3, we explicitly derive a domain of attraction for the positive equilibrium of system by using Liapunov method; The local stability and the conditions that Hopf bifurcation occurs are obtained in chapter 4; In chapter 5, some explicit fomulae of the direction of Hopf bifurcation and the stability of bifurcating periodic solutions on the center manifold are determined,using normal form and center manifold introduced by Hassard et al; In chapter 6, some numerical simulations are performed to illustrate the analytical results found; Our paper ends with a brief conclusion.

全文共分七章，第1章对捕食-食饵系统的发展背景做了介绍并给出了本文研究的模型；第2章讨论了系统的保持性和解的有界性；第3章研究正平衡点的全局性质，对正平衡点的吸引域进行了精确估计；第4章研究了系统的正平衡点的局部稳定性和Hopf分支存在的条件；第5章利用规范型和中心流形定理得到了一个决定Hopf分支方向、分支周期解的稳定性及其他性质的精确公式；第6章对一个具体模型进行了数值模拟；第7章对全文进行了总结。

It is difficult to research dynamic stability of single-layer reticulated domes under earthquake action by Lyapunov dynamic stability theory.

基于这一理念，本文提出了动力稳定性实用判别方法，并在不同荷载和不同计算条件下进行了充分验证。

The bigger top tension will cause the wellhead to be over-pulled and increase the probability of wellhead collapse. As the mean drifting of drilling vessel or platform increases, the wellhead displacement and bending moment nearly linear enlarges. The greater current velocity may result in wellhead instability because of its limited bearing moment capacity. Therefore the drifting control is very important to subsea wellhead stability. The wellhead stability may be improved by taking measures such as enhancing the conductor bending strength, controlling scour depth on seabed, getting geological data sampling of shallow formations.

算例分析表明，水下井口的横向偏移及弯矩随张力比和海流流速的增加而大幅增大，顶张力过大会引起井口稳定性变差；随着钻井船或平台漂移量的增加，井口的横向偏移和弯矩近似线性增加，控制好钻井船或平台的漂移非常重要；由于井口承受弯矩的能力有限，较大海流流速情况下可能造成井口失稳；提高导管抗弯强度、控制泥线处管柱冲刷、获取浅部地层的取样数据等措施可以增强井口稳定性。

In order to ensure system stability and reliability, use of pure software dual module hot spare mechanisms to achieve system reliability and stability, by dual module hot spare system architecture design, to implement the dual module hot spare system from the system start,"heartbeat" signal transduction, fault detection system and the main switching equipment for several major aspects.

为了保证系统的稳定性与可靠性，采用纯软件化的双机热备机制来实现系统的可靠性与稳定性，通过对双机热备系统进行总体结构设计，从系统启动，"心跳"信号传递，故障检测以及系统主备机切换等几个主要方面对双机热备系统予以实现。

It is proved that this method can improve the system dynamic stability and the transient stability effectively.

仿真结果表明，所设计的控制方式能有效地提高系统的动态稳定性和暂态稳定性。

Firstly, the pulse source of middle- and far-range is deeply studied. The influential factors on the stability index of a pulse source are minutely analyzed, and full-solid and high-stability pulse source units, based on avalanche dynatron, are designed.

通过电路合成和空间合成两种方式进行脉冲源单元的功率和重复频率的相干合成，研制出高功率、高重频脉冲源，为实现超宽带冲激雷达的中远程目标探测提供了前提条件。

The general judgment of ferroelectrics perovskite stability using the tolerance factor and electronegative value of force difference,the stability of ferroelectrics perovskite can be well explained.

利用容忍因子和平均电负性力标差值作为钙钛矿稳定性的综合判据能很好说明钙钛矿稳定性。

The model in this paper takes the form as belowThe main contents and results in this paper are as follows:In section 1, we state our main analytical results on equilibria of the above system. First, several sufficient conditions for coexistence of the steady-state are given by the standard fixed-point index theory in cone. Second, the global structure of the coexistence solutions and their local stability are established by using bifurcation theory. Third, the multiplicity, uniqueness and stability of positive steady-state solutions to this system are derived by means of perturbation theory of eigenvalues, standard regularity theory, Sobolev embedding theorem and fixed-point index theory.

本文主要有两章内容：第一章研究了该模型正平衡解的性质，可分为三部分：第一部分运用极值原理、上下解方法和锥映射不动点指标理论得到正平衡解存在的充分条件；第二部分利用分歧理论给出了平衡态系统正分歧解的结构，并讨论了局部分歧解的稳定性；第三部分利用特征值扰动理论、标准椭圆正则化理论、Sobolev嵌入定理及指标理论讨论了正平衡解的多重性、唯一性及稳定性，并讨论了参数对解的影响。

The new company's leading coal gasifier in marketing, mainly to address the industry's major problems: environmental protection, high-carbon conversion rate (from the old gas water heater for 70% to 90%), non-coking furnace (furnace Gasification of low-temperature control, coal gangue powder plus), the stability of performance (the old furnace Ende made great improvements, better stability).

公司新型煤气化炉领先于市场推广，主要是解决了行业内的几大难题：环保、碳的高转换率(由老式水煤气炉的70%提升至90%以上)、炉内不结焦(炉内气化温度控制的低、煤炭粉料加煤矸石)、性能稳定(老式恩德炉上作了很大改进，稳定性较好)。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。