分布的

Then thedistribution of the students during the period is analyzed and thealgorithm is proposed according to the size of the total students sample.Finally based on the research above, a modified dynamic probabilitydistribution algorithm is proposed to meet the the real-time and equitydemand of the course-selection system. Compared with the knownalgorithms, this algorithm can put in practice real-time course-selection.At the same time the anticipator can select the course with the sameprobability.

本文首先对已有的选课算法进行了比较研究，随后对选课人数随时间的分布进行了分析，并进行相关算法研究，按照选课样本的大小提出了相应的算法；最后综合上述算法，提出了一种改进的基于概率动态分布的选课算法思想，使得整个选课过程中，实时性与概率动态分布有了很好的结合与体现，既实现了实时选课，又能后使得参选人尽可能的拥有相等的机会(即实现选课过程中的相对公平合理性)选中某个课堂。

After the biomechanical finite element analysis for the three-dimensional reconstruction model, we find the structure of the deformed nose showes the following characteristics: 1, Nasal septum, nasal columella, lateral feet of nasal alar, lateral nasal dorsum are stress concentrated regions, that is the key mechanical positions of deformed nose; 2, Under the static state, nasal deformation has a very small value of stress distribution, under displacement load status, the deformed nasal has a large value of the stress distribution; 3, Ipsilateral nasal columella are the the key mechanical parts of deformed nasal rectify. And lateral nasal alar is also the most stress concentrated areas.

对于重建后的单侧唇裂鼻畸形鼻部模型进行有限元生物力学研究，发现畸形鼻的力学结构呈现以下特点：1、鼻中隔、鼻小柱、鼻翼外侧脚、鼻背外侧是单侧唇裂鼻畸形应力分布的集中部位，也就是畸形鼻部的力学关键部位；2、在静态状态下，畸形鼻部拥有的应力分布值很小，在位移载荷状态下，形变后的畸形鼻部拥有的较大的应力分布值；3、单侧唇裂鼻畸形整复中，鼻小柱患侧部是畸形整复的力学关键部位，其次就是患侧鼻翼部。

On the basis of this system andpreviously morphological, physiological and biochemical studies on cucumber in vitrogynogenesis. Materials from both typical gynogenesis using M99 as induction medium andnon gynogenesis using W5 as induction medium were collected. The activities anddistribution of peroxidase and its isoenzymes, content of soluble protein and distribution of allprotein during early stage of cucumber in vitro gynogenesis and non gynogenesis wereinvestigated by biochemistry and histochemistry technology.

本试验在前期有关离体黄瓜雌核发育形态学和生理生化研究的基础上，以诱导离体雌核发育的 M99 培养基上和非雌核发育的 W5 培养基上培养的黄瓜未受精子房为试材，采用生物化学技术和组织化学技术，深入研究了离体雌核发育早期外植体内的标志酶——过氧化物酶及其同工酶的活性及分布的变化、可溶性蛋白质的含量和总蛋白质分布的变化及核酸和多糖分布的变化，为揭示离体雌核发育早期的细胞分化机制提供科学依据。

The tensile strength and the elastic modulus were assumed to obey Weibull and logarithmic normal distribution and the other mechanical parameters were taken as constant values in the simulations of three-graded-concrete supported beam. The random aggregate random parameters model was established, which is very close to the actual structure. The results show that the nonlinear behavior of higher homogeneous specimen appears later obviously; the influence of random distribution of elastic modulus on the mechanical character is very little in linear range, while great in nonlinear range; random distribution of tensile strength affects the strength and the damage threshold of concrete obviously.

对三级配混凝土简支梁进行数值模拟时，假定各相材料的抗拉强度和弹性模量服从Weibull、对数正态两种随机分布，其他力学参数取定值，生成和实际结构比较接近的随机骨料随机参数模型，数值模拟结果表明材料均质度较高的试件出现非线性行为的时间要明显滞后于均质度较低的试件；弹性模量分布的随机性对材料线弹性段力学性能的影响极小，而对非线性区域的影响较大；材料强度分布的随机性对混凝土的强度和损伤阈值有较大的影响。

Based on a quantitative analysis of radiolarian in 80 surface-sediment samples from the northern area of Okinawa Trough, this paper reported the species composition and faunal assemblages characteristic of radiolarian, expounded the distribution pattern of radiolarian abundance and diversity in surface sediments from this area. In this paper, a preliminary study on the relation of the distribution and abundance of radiolarian to environmental factors, such as chemical and physical properties of the overlying masses (sea-surface temperature, salinity, nutrients and primary productivity) and the type and composition of sea-bed sediments was made. The radiolarian data was evaluated using a Q-mode factor analysis to identify different faunal assemblages and their geographic distributions, then the relationship between radiolarian assemblages and distribution of water masses, hydrographic boundaries such as frontal systems was analyzed. A new radiolarian-based transfer function to estimate mean-annual sea surface temperature and seasonal range were examined to test its success in the study area.

本文对冲绳海槽北部80个表层沉积样品中的放射虫进行了系统鉴定和定量统计，研究了放射虫的种类组成与类群特征以及其丰度和分异度的分布；分析了海水温度、盐度、营养盐以及沉积物类型、成分等环境因素对放射虫分布的影响；采用Q-型因子分析，求得放射虫的属种和组合分布特征，探讨了放射虫组合与不同水团、海洋水文结构之间的关系；并对Pisias（1997）建立的估计表层海水年平均温度和其变化范围的放射虫转换函数在研究区的适用性做了检验。

Acquired conclusion was that the sample mean value submitted to normal distribution, and the sample variance was composed of a number of linear sum of random variable submitted to Chi-Squared distr.

得出的结论是：样本均值服从正态分布，样本方差由若干个服从卡方分布的随机变量的线性之和组成；样本均值的期望等于各管落点期望的算术平均值，方差为各管方差的算术平均值；样本方差是各管落点总体平均方差的无偏估计，方差与各管落点散布的差异相关；样本均值与方差相互独立的充要条件是：各管落点属于独立同分布样本。

The dislocable distribution of pedestrians in initial status as well as movement process enhances the interactions among pedestrians.The walking speed is adjustable because the pedestrian can move one or more small grids in each time step.The exit is figured more accurately because of the finer lattice,which reduces the probability of pedestrians passing the exit abreast. When one pedestrian walks in the middle of an exit and no pedestrian could share the exit with him,then the evacuation efficiency is decreased.

网格细化使得行人在初始状态以及运动过程中呈现错位分布的特性，行人的错位分布加剧了行人间的相互排斥；网格细化使得在每个时间步内行人可以运动不同的格子数，从而实现了速度的可调性；网格细化使得出口得以精确的网格划分，在错位分布的作用下，形成了多格子模型中特有的行人出口独占效应，大大降低了出口的利用率。

The probability distribution model is often used in simulation system to get the needed random number. Firstly how to simulate approximately the common method of probability distribution with Monte-Carlo is presented, and a high quality number randomizer is designed. The frequent stochastic distribution models on simulation system are mainly examined, which have some worth in utility.

计算机仿真系统中经常要应用研究对象的随机分布模型获得符合要求的随机数，给出了利用蒙特卡罗法来近似地描述研究对象的概率分布的一般方法，设计了高质量的随机数发生器，研究了利用MC法得到计算机仿真系统中常见的随机分布模型算法，具有一定的实用价值。

The measurement model for the retardation distributing of the quarter wave plate was introduced by Muller matrix and Stokes parameter. And four patterns with phase shifting of 90°in turn were eatched simultaneously by an especial spatial splitting phase-shifter.

1／4波片相位延迟分布的动态测量，通过密勒矩阵和斯托克斯参量法对一种1／4波片的相位延迟分布的测量模型进行了推导，并设计出一种空间分光移相器，取代一般测量系统中的检偏器，使得系统能于瞬间同时采集四幅具有90°移相步长的干涉图，避免了环境振动对测量的影响，从而可以对1／4波片的相位延迟分布进行动态在线测量。

The theoretical research on probability theory and random process and the practical applications show that the class normal distribution is most widely distributed in actual natural phenomenon and social phenomenon, cloud model is a powerful tool in simulating class normal distribution, controlling particle generation and particles attribute alternation of the particles system based on the cloud mode will simulate the natural rain more realistically, and has more fidelity effect.

概率论与随机过程的理论研究和实际应用表明，类正态分布在实际的自然现象与社会现象中分布最为广泛，云模型是模拟生成类正态分布的有力工具，基于云模型控制粒子系统的粒子生成、属性的改变能够更真实地模拟自然雨的生成，具有更逼真的效果。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。