查询词典 dual basis

The first part is the preparatory knowledge, introducing the contracting mapping principle which through the basis of vector and matrix norm, derivative and differential theorem of mean to thorough understanding the nature of soluble for nonlinear equations.

第一部分为预备知识，重点介绍压缩映象原理。通过引入向量与矩阵范数，导数与微分中值定理，以求深入理解非线性方程组可解性的基本理论。

Objective:It is in order to discuss clinical experience and basis for repairing scar contracture of anterior region of neck.

带蒂精索外筋膜瓣在尿道下裂手术中的。。。1。解放军第451医院颌面整形科西安710054 2。第一军医大学临床解剖研究所广州510515

On the basis of these research results,a novel electrionically controlled injection system has been developed.

在此基础上发展了专为DME使用的电控喷射系统。

Similarly, access to system logic is controlled on the basis of appropriate Access Codes.

同样的，对系统逻辑的访问在适当的接入代码的基础上受到控制。

Moreover,the pile foundation is more damanding,this article based on the interaction of pile and soil, explore the transmission mechanization of mechanics in the pile-soil interaction system, try to find a theory basis for the foundations supporting design and settlement controlment.

本文从相互作用的角度出发，探求桩土相互作用体系中作用力的传递机理，试图为桩基础的承载力设计和沉降量控制找到一种理论依据。

To provide morphological basis for the location, approach and spinal radix identification of the SPR and SAR at medullar conus.

目的：为脊髓圆锥部进行SPR和SAR手术提供定位、入路和辨认神经根的解剖学依据。

Socialism is current the objective foundation of existence Chen Yong army one, the understanding of the objective basis that convection of current meaning differentiate and analyse understands, the understanding that understands an implication with convection is contacted together.

社会主义流通存在的客观基础陈甬军一、流通的含义辨析对流通的客观基础的理解，是与对流通含义的理解联系在一起的。

These conclusions will provide a significant basis for further study on severe convective weather in Guilin.

这些结论为进一步研究桂林的强对流天气提供了重要依据。

On the basis of conventional optimized structure, a new optimization method is proposed.

本文在传统优化结构的基础上，提出了一种新的优化方法。

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。

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。