均匀分布

In this paper, a mathematical description of mutation operator and a concept of mutation function for the study of evolutionary programming and evolution strategies are proposed, and several methods and examples of constructing mutation operator with uniformly distributed random variables are presented.

进化算法是研究全局优化算法中最重要的随机算法之一，本文给出了进化规划和进化策略的变异算子的数学描述，并提出变异函数的概念，在此基础上，给出了用均匀分布的随机数构造变异算子的几种方法和若干例子。

Glass-ceramics material is prepared out of the base glass via controlled crystallization and devitrification treatments.

微晶玻璃(glass-ceramics)又称玻璃陶瓷或结晶化玻璃，是由基础玻璃经控制晶化行为而制得的微晶体和玻璃相均匀分布的材料。

Stud shear reinforcement can be arranged in perpendicular and diametrical directions, and it should be evenly arranged around the column region.

抗冲切锚栓的布置方式包括正交布置和径向布置，且抗冲切锚栓应在柱周边区域均匀分布。

Illustrative results are presented for the radiation dose and dose profile with activity distributions: uniform, determined by steady-state diffusion into the target volume, or determined by steady-state diffusion with a constant rate of loss of activity from the target.

计算程序用Visual Basic V6.0编写，在微机上运行。为了验证计算结果，将均匀分布条件下的计算结果分别与文献报导的结果比较，发现它们是一致的。

Beijing Institute of Technology, Beijing 100081,ChinaIn order to get the high output power, a RF excited diffusively cooled all-metal slab waveguide CO2 laser was reported, in which gas discharge region was constructed by two aluminum side walls and aluminum electrodes. The region dimension was 2 mm height×20 mm width×386 mm length, and the gas composition was CO2:N2:He:Xe=1:1:3:0.26. This technique replaced the old ceramic and metal sandwich waveguide technique.The optimum out power 127 W was achieved from the RF excited diffusively cooled all-metal slab waveguide CO2 laser with the longitudinal voltage uniformity distribution technique and scaling area technique. The electro-optic conversion efficiency was about 14%.

为了获得较高的激光输出功率，介绍了射频激励扩散冷却全金属板条波导CO2激光器，放电区域由左右两个铝合金壁和上下两个铝合金电极构成，放电区域高2 mm，宽20 mm，长386 mm，工作气体混合比CO2：N2：He：Xe=1：1：3：0.26，该技术代替了过去的金属陶瓷结构，结合纵向电压均匀分布技术和面增比技术，获得了127 W的激光输出功率，光电转换效率高达14%。

The nano- grains with an average size of 46 nm were homogenously dispersed in an amorphous phase matrix .

结果表明：涂层的组织主要由非晶相和α相纳米晶组成；平均尺寸为46nm的α相纳米晶均匀分布于非晶基体内。

Theoretic analysis as well as experimental data indicates that the even dispersion of Ni in Ag matrix increases the viscosity of melting liquid, which impedes favorably splashing of fused mass.

理论分析和实验数据表明，细小的Ni在银基体内的均匀分布提高了熔融体的粘度，有利于阻止电磁力作用下液体的飞溅，提高了触头的抗电弧侵蚀能力。

In addition, the non-uniformity of distribution in three-dimensions space appears to b...

另外，三维空间的非均匀分布的可能性是存在的。

They showed strong ability to accumulate the positively charged DOX with a factor of tens to hundreds, i.e.

激光共聚焦显微镜和透射电镜揭示了药物在微胶囊内均匀分布。

The styrene-acrylate spheres were coated with the TiO2 colloidal particles via electrostatic effect and hydrogen bond interactions with the increase of aging time, thus the film-forming capability of the solution was changed. The poor film-forming capability results in the formation of the porous structure with dense, homogeneous island morphology. Then the TiO2 porous films with dense pores can be obtained after two coating-dissolving cycles.

结果表明，TiO2溶胶与苯丙乳液混合后，陈化时间的延长有利于TiO2胶粒通过静电、氢键作用在苯丙乳液粒子表面形成吸附层，从而改变涂膜液的成膜性，形成较为密集、且均匀分布的岛状多孔结构，在此基础上经两次涂膜，即可获得具有致密孔洞的TiO2多孔薄膜。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。