随机性

Analyzes the stochastic ergodicity and sensitivity of initial value of chaos model, proposes the chaos pseudo parallel genetic algorithm based on multiple populations.

摘要剖析了混沌模型的随机性、遍历性和初值敏感性的特点，提出了多种群伪并行混沌遗传算法。

In the wind - solar hybrid power supply System, because of wind and solar intermittent, random, regional differences, as well as the time difference makes energy storage devices has become a complementary scenery in the entire power generation system in one of essential components.

在风光互补发电系统中，由于风能和太阳能的间歇性、随机性、地区差异性以及时间的差异性，使得储能装置成了在整个风光互补发电系统中必不可少的部件之一。

However, due to the complicated transfer mechanisms at the interface coupled with the motion and geometry of the interfaces, it is difficult to model the interfacial transfer terms in two-fluid model.

然而，由于两相交界面的复杂性、多变性、随机性，两流体模型中有关相界面传输项的模化仍是多相流研究领域的一个难题。

In view of the lack of consideration for the random and the fuzzy of design parameters in traditional optimal design for the machine tool spindle,the fuzzy reliability is introduced into the process, and then a mathematical model is estadlished in the light of the optimal design theory.

针对机床主轴常规优化设计不考虑设计参数的随机性和模糊性，提出将模糊可靠性引入到主轴的优化设计中，在常规优化设计的基础上建立了机床主轴模糊可靠性优化设计的数学模型。

Results show that random properties of parameters take more effect on the thin-walled box-girders.

计算结果表明，计算参数的随机性对薄壁结构的可靠指标有显著的影响，是工程设计中一个不可忽视的因素。

These kinds of natural scenes do not have regular shape, but have stochastic and self-similar characteristic.

这类自然景物不具有规则几何形体，同时具有随机性和自相似性。

A brief account is given of the problem in traditional high arch dam safety evaluation without considering the randomness and without failure mode analyzing.

简述了高拱坝传统安全评价中不考虑随机性、不进行失效模式分析等存在问题，提出应用失效概率与风险值两个指标对高拱坝进行安全评价。

Current used technology is physical testing methods, which has the deficiency of high cost, random and rough results. Finite element model of corrugated box was established by use of ANSYS analysis software to simulate the actual environmental load imposed on the model, and the compressive resistance of the corrugated box was obtained.

针对目前采用的测试技术物理测试方法存在着成本高，结果具有随机性和粗糙性等缺陷，应用分析软件ANSYS建立瓦楞纸箱的有限元模型，模拟实际的流通环境对模型施加载荷，从而求得瓦楞纸箱的抗压强度。

The result showed that three mAbs could bind onto DAF displayed on the surface of yeast.

表明所构建的基于DAF 框架的酵母呈现突变体库库容完整、随机性好，符合筛选的要求。

An equal cross-section blade was investigated and a finite element model was built parametrically. Geometrical parameters (such as length, width and thickness), material parameters (such as young's modulus and density) and speed of blade were considered as input random variables while the static frequencies and dynamic frequencies were output random variables. Combining the finite element method, response surface method and Monte Carlo method, the statistical properties and cumulative distribution functions of static frequencies and dynamic frequencies were obtained. Probability sensitivities analysis, which combined the slope of the gradient and the width of the scatter range of the random input variables, was applied to quantitatively evaluate the sensitivities of static frequencies and dynamic frequencies with respect to the random variables. The Scatter plots of structural responses with respect to the random input variables were illustrated how to adjust the values of the static frequencies and dynamic frequencies by changing input random variables.

文中以某试验台用汽轮机等直叶片为研究对象，考虑几何参数、材料参数和转速的随机性，通过有限元参数化建模，将确定性有限元方法、响应面方法和Monte-Carlo模拟法相结合，从而获得了叶片静频、动频的统计特性和累积分布函数；同时考虑随机变量的梯度和离散范围对静、动频的影响，通过概率敏感性分析，定量地判断出叶片静、动频对随机输入变量的敏感性；通过绘制叶片静、动频与输入变量的散点图，定量地分析了如何改变随机变量以调整静、动频率的方法。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。