查询词典 logistic

According to the Logistic Equation and the impact of stochastic factors, a stochastic nonlinear dynamical model had been presenred. The max Lyapunov exponent was calculated by Oseledec multiplicative ergodic theory, the local stability conditions had been obtained; the global stability conditions had also been obtained by judging the modality of the singular boundary; the stochastic Hopf bifurcation was analyzed using the invariant measure of stable probability density, and the condition of stochastic Hopf bifurcation had been discussed. The key parameter impacting the urban domestic water consumption had been found by numerical emulation.

根据Logistic阻滞增长模型原理，考虑到诸多随机因素的影响，本文建立了一个城市生活用水量的随机非线性模型，运用Oseledec乘性遍历定理计算了模型的最大Lyapunov指数，得到了局部稳定性的条件；通过对扩散边界性态的分析，得到了全局稳定性的条件；通过分析系统平稳状态概率密度的不变测度，得到了模型随机Hopf分岔的条件，结合实际进行了数值仿真，得到了影响用水量的关键参数。

By making use of the ergodicity specific to the chaotic theory, one can improve the chaotic-searching optimization method based on Logistic mapping.

在优化设计领域中，混沌现象的遍历性特点可以作为搜索过程中避免陷入局部极小的一种优化机制。

Methods 1000 children first permanent molar normal eruptively were surveyed the extent of initial demineralization on the caries saitivity position by laser-fluorescence system KaVo DIAGNOdent,and chosen 60 no- demineralized children and 60 initial-demineralized or caries-susceptible children,Data were collected by questionnaire from their parents and analyzed by logistic regression and x2 test on computer.

采用激光荧光测定仪对1000名第一恒磨牙均已正常萌出的儿童进行龋敏感点位脱矿程度检查，随机抽取釉质无脱矿组和釉质脱矿组或龋病损组，60份有效配对问卷，进行x2检验及Logistic回归分析。

In this part,it mainly reseach on if the parameter estimation of multi-variable logistic distribution has these good properties.

这一部分主要研究多元Logistic分布的参数估计是否具有这些好的性质。

The thesis analyzed chiefly on on law of physical sign disposition of deficiency of spleen-QI in pedo-eczema.Using pykno-analysis, data has been analyzed. We got 23 physical signs of statistical significance,and had non-conditional logistic regression analysis to them. We got 11 physical signs of great value in pedo-eczema diagnosis,including dim-coloured anthema, athrepsy body, weak pulse, diarrhea , etiolate complexion,light texture of tongue,soft skin, house-wife hand,dim qichi, fissured tongue, bluish tendon in shangen etal.And contrast with former diagnostic criteria of deficiency of spleen-QI published by TCM administration bureau, unearch part of the unnoticed physical signs.

论文着重分析了小儿湿疹脾气虚证的体征分布规律，采用频数分析方法，对数据进行统计学分析，分析出其中具有统计学意义的23项体征，并对其进行非条件性logistic回归分析，得出对小儿湿疹诊断具有重要价值的疹色暗淡，形体消瘦，脉无力，便溏，面色萎黄，舌质淡，尺肤松软，手掌纹理增多，气池暗，裂纹舌，山根青筋等11项体征，并与以往国家局的脾气虚证证候诊断标准对照，从而发掘出部分以往未被重视的体征。

Based on the logistic model and learning curve model,the simulation analysis on the evolution model of wind-power industry shows that the industry chain of wind power has an expansively developing prospect.

基于Logistic模型和学习曲线模型构造的风电产业演化模型仿真分析表明，我国风电产业链的发展前景广阔。

The growth dynamics of leaf length on stem and tiller could be described with a logistic model, leaf width with conic equation, and leaf shape with exponential function and quadratic equation. The effects of nitrogen and water conditions on leaf growth were quantified by the effective values of leaf nitrogen concentration and water content.

模型采用Logistic方程描述了水稻主茎及分蘖叶片随生长度日的动态伸长过程；利用二次曲线描述了叶宽随GDD的动态变化过程；分别用幂函数和一元二次方程描述了叶形的动态变化过程；另外，以叶片氮素和水分因子分别描述了不同水氮水平对叶片形态建成过程的定量影响。

Because of the extensive range and large quantity, local administrative organs are in a very important position in the system of governments in our country. Besides, the logistic management system of local administrative organs is an important component of the local administrative management system, which is an important guarantee of the smooth function of local governments' activities.

地方行政机关在我国的政府系统中由于范围广泛、数量巨大而处于一个非常重要的地位，而地方行政机关后勤管理体制是地方行政管理体制的重要组成部分，是地方政府职能活动顺利进行的重要保障。

Consequently the stochastic simulation method of compound extreme value distribution is brought forward. The present study shows that the simulation method is reliable and can give accurate solution. As an example, Poisson-Nested Logistic model is applied to the design of sea wall.

根据复合极值分布的特点，针对复杂失效域下多维联合概率难以解析求解的困难，本文提出了多维复合极值分布的随机模拟方法，并验证了该方法的准确性，扩大了多维复合极值分布的应用范围。

Combination of factor analysis and logistic regression analysis can improve the efficiency of the financial early warning.

因子分析与Logistic回归分析相结合更能提高财务失败预警模型的有效性。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。