查询词典 structure group

A switch with three groups of electrodes was developed. The feasibility of the concomitance of multi-group electrodes, the switch structure and the internal electric field were analyzed.

设计了一个有3组电极的开关，给出了开关的结构，分析了多组电极共存的可行性和开关内的电场，利用通用电路模拟软件对通过开关的电流进行了计算。

PSO is a population-based optimization algorithm, which mimics the social behavior of animals in a flock. It makes use of individual and group memory to update each particle position allowing global and local search optimization. The objective function considered was the total weight of the structure subjected to stresses, displacements and forces constraints. The effects of the parameters were investigated as well and such combination of tuning parameters promote a better global search behavior avoiding premature convergence while rapidly converging to the optimal solution. Results showed the effectiveness of the proposed method by comparing with ANSYS Design Optimization Tool (zero-order method). The PSO with the tuning parameters makes it an ideal method for offshore wind turbines foundations optimization tasks.(2) A reliability analysis method for pile foundation bearing axial loads based PSOThe performance function of pile foundation's axially bearing capacity sometimes is nonlinear and complex, on the basis of geometric meaning of structural reliability index, an optimum model with PSO for structural reliability analysis under arbitrary random variables was established, The PSO algorithm is very efficient to solve global optimization problemsIts use in structural reliability field presents not only the advantage of its facility of implementation, but also the possibility to obtain the design point and the failure probability with a good accuracy. In addition, PSO is a zero order algorithm, for no derivative is necessary for its implementation.

本文的研究针对桩式海上风机基础结构的特点，在国内外有关研究成果的基础上对海上风机基础结构优化设计理论和可靠度方法一些相关问题进行了较为深入的研究，具体做了以下几个方面的工作：(1)基于粒子群优化的桩式海上风机基础确定性优化设计方法桩式海上风机基础的优化设计是一个复杂的、非线性约束的优化问题，针对传统的基于梯度信息的优化方法在处理非线性问题中易陷入局部最优解的问题，本文将一种耦合惩罚函数的PSO算法引入到海上风机基础结构概念设计中，PSO算法是从群体动物聚集觅食这一活动中受到启发而发展的，该算法利用个体和群体的信息共享不断改进自身的位置从而进行局部和全局最优搜索，本文中以桩和三脚架连接段直径及壁厚为设计变量，以基础总重量作为优化的目标函数，在给定的约束条件下建立了三脚架基础优化数学模型，另外本文还研究了PSO参数变化对结果的影响，协调的参数组合可以避免陷入早熟收敛而能够快速的获得全局的最优解，通过与ANSYS优化模块的计算结果比较验证了该方法的有效性，本方法为海上风机基础的确定性设计提供了一条有效的途径。

Study tool is "Science and technology Material Item Correlation Table" drawn up by research group, answered by three current teachers, the correlation of each material item is displayed by quantification data through SPSS statistical software to understand potential internal factor and display another structure in the curriculum.

研究工具是由研究小组建立一「自然与生活科技教材内容细目相关联表」，由三位现职教师填答，经SPSS统计软体处理，将教师对教材细目之间的关联性，以量化数据的方式呈现，来了解课程潜在的内在因素，及呈现课程的另一架构。

MAIN OUTCOME MEASURES: Structure changes in cerebral cortical neural cells in rats of each group.

主要观察指标：各组大鼠大脑皮质神经细胞的结构变化。

The reason is that B group disturbed the crystallite structure and reduced crystallinte size.

原因是个基团B破坏了晶体结构使球晶的尺寸变小。

After forty-five days, the broilers were killed and the structure of mucous epithelium in the small intestine was observed. The results showed that in two groups of high zinc-selenium and low zincselenium, the epithelium of mucasa was atrophy and defluxion, especially in the high zinc-selenium group.

结果表明：高锌高硒或低锌低硒组肉鸡的肠黏膜结构有明显的损伤，表现为肠黏膜上皮细胞萎缩，上皮内淋巴细胞数量和杯状细胞数量减少；尤其是高锌高硒组的损伤最为严重。

In this paper, we mainly use complex semisimple algebras knowledge. First, we give the structure formula of C. Second, we show that any n x n symmetric matrix A is congruent under the symplectic group to the direct sum of a identity matrix and a tridiagonal matrix.

记正交代数和辛代数的交集构成的李代数为L，本文主要是运用复半单李代数的知识，首先给出了L的结构公式，然后给出了任一n×n对称矩阵A辛合同于一个单位矩阵和一个三对角矩阵的直和。

The dual structure of the complex fault depression in Songliao Basin and its geologic historic construction determined the existence of two sets of petroleum systems and their differences. The deep fault-depression group developed during Late Jurrasic to early Cretaceous and the particularity of the constructions of its inside sedimentary rock and volcanic rock determined the particularity of the natural gas enrichment conditions.

松辽盆地断拗复合的二元结构及独特的地质演化特征，决定了2套油气系统的存在和差异；晚侏罗－早白垩形成的深部断陷群及其内幕沉积岩和火山岩建造的特殊性，决定了天然气富集条件的特殊性。

Inner structure of ethnic traditional dwelling house receive great influence of culture,through cultural and religious background of the ethnic group .

传统民居的内部结构，受各民族精神文化即民族固有的思想背景及宗教因素的影响。第四，居住文化是在住宅和民族文化的相互影响中形成的，同时具有历史性和时代性。

Result: The model group rats bone epiphysis were thinner, the trabecular cracks were more numerous and the net-structure was destroyed.

结果：模型组大鼠胫骨器板变薄，骨小梁裂纹、断裂者较多，网状结构破坏。

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。