查询词典 equality constraint

Although a unique index will help locate information, using a primary key or unique constraint will give you the best performance.

尽管唯一的索引可用来定位信息，但使用主键或唯一约束可为您提供最佳的性能。

The main contributions of the dissertation are as follow:(1) The possibility of generation hexahedron mesh through tetrahedron conversion method was studied,and a set of feasible method to deal with the boundary condition of constraint and loads has been brought forward.

本文的主要工作包括如下几个方面：(1)研究了在紫瑞CAE基础上采用四面体转换法进行六面体网格全自动剖分的可行性并对约束和载荷的处理提出了一套可行的方案。

In this paper, we put forward a 2.5D model based on the hexahedron and an inversion method of constraint gravity-vertical fault.

本文从六面体模型出发，将二度体模型修改为似二度体模型，建立了一个带约束的重力－垂直断层反演模型，经过理论模型试验证明效果要优于二度体模型的反演结果，在此基础上对美国内华达州的圣安德烈斯地区的布格重力异常资料做了定量解释。

Secondly, it used the hierarchic role and separation of duty constraint to solve the overlapping problem of roles.

该模型通过用户—角色—权限的权限授权模式，减少了授权管理的复杂性；通过角色等级和职责分离约束解决了用户角色职能交叉重叠的问题；引入团队和个性化数据集的概念，改善了系统的数据的访问隔离问题并完善了用户个性化；最后介绍系统实现实例。

The constraint classification and a hierarchical solving modeling are put forward in this paper, helpful for the validity and calculation of mechanical product layout.

本文结合机械产品布局设计问题，提出了有利于解决机械产品布局问题的有效和可计算的布局约束及其分类，建立了分层递阶求解模型和相应的解决策略。

Therefore, it is more important to improve TW with an eye to the increasing of starch contents on account of the less constraint effect of lysine to starch contents.1.2 Sources of variations of test weight in maizeClustering analysis was used in 2004. Twenty-nine summer maize hybrids released for commercial production in Shandong province were divided into three types: high-test weight, medium-test weight type and low-test weight type.

通径分析结果表明总淀粉含量对容重的决策系数最大为68.52%，故要提高容重，应该首先着眼于籽粒总淀粉含量的提高。1.2籽粒容重差异的主要来源2004年试验通过聚类分析将山东省最新审定的29个玉米品种划分为三类，高容重型、中容重型和低容重型。

In order to reasonably depict four basic problems with friction, one Coulomb friction new form in first Kirchhoff stress is proposed to deal with finite deformation problems, other Coulomb friction form in incremental mode to elastoplastic flow theory; Hilbert function spaces concerning elastoplastical problems with friction are established, so it makes all operations and calculations in the treatise standardized within the scope of reasonably topologic structure; In view of functional extremum, the equivalence between generalized variational inequalities principles in elastoplasticity with friction and corresponding basic problems are testified by inducing Lagrangian multipliers, so it provides a rationally theoretical basis for numerical methods in elastoplasticity with friction; From the viewpoint of variational inequality, the theory of generalized variational inequalities in elasticity and elastoplasticity with frictional constraint is studied, and the uniqueness and existence of the solution of FEM is proofed under the proposed conditions of stress compatibility, and them FEM approximation and a discrete solution are discussed; Based on the principles of generalized variational inequalities in elastoplasticity with friction, direct generalized variational inequalities methods is pretended, which is a natural generalization and development of direct variational methods; Using generalized variational inequalities methods, some examples in metal forming including plane deformation, upset and extrusion are analyzed and the results prove that all the theories and methods in the paper are right, feasible, accurate and advanced.

主要内容有：为了合理地描述金属塑性成形中摩擦约束弹性、弹塑性基本问题，提出和研究了有限变形下以Kirchhoff第一应力表示的Coulomb摩擦定律形式和弹塑性流动理论下以增量形式表示的Coulomb摩擦定律表示形式；系统建立了摩擦约束弹塑性问题的Hilbert函数空间，使本文规范在一个具有合理的代数拓扑结构内进行一切操作和运算；利用Lagrange乘子，从泛函极值的角度系统地阐述和论证了一系列摩擦约束弹性、弹塑性广义变分不等原理与相应的实际问题之间的等价性，它为处理摩擦约束的弹塑性力学数值方法提供了合理的理论基础；从变分不等式的角度出发，阐述了对应于摩擦约束弹性、弹塑性问题的广义变分不等式理论，首次提出了在应力相容性条件下，它的有限元解具有存在唯一性，进而讨论了其有限元近似及离散解法；基于摩擦约束弹塑性广义变分不等式原理，首次提出了直接广义变分不等式方法，这一方法是直接变分法的合理推广和发展；利用直接广义变分不等式方法对金属压力加工中的平面变形问题、镦粗、挤压等塑性成形问题进行了分析计算，验证了该理论和数值算法的正确性、实用性、精确性和优越性。

But on account of hugeness of design variable,constraint condition and computational complexity,the achievement of structural optimization for high rise building in engineering had droped behind the progress of theory out and away in recent years.

但是由于设计变量、约束条件、计算量过于庞大的原因，其成果还较少应用于工程实际，目前远远落后于理论进展。

The watermark data are embedded into some proper hypercomplex frequency components and their corresponding HFT coefficients are modified to fulfill the symmetry constraint. The prerequisite, the watermarked host image in spatial domain should also be transferred in red, green, and blue channels, of embedding watermark data into the hypercomplex frequency domain is obtained.

它通过对彩色载体图像进行快速超复数傅氏变换，在超复数频域选择合适频段嵌入水印，并且修改其对称系数的值，保证了嵌入水印图像仍然可以用彩色图像的红、绿、蓝三色进行传输。

Hyperkinesia, division and depression, bluedevils and aggresive were common among boys; against discipline, division and constraint and other problems were common among girls.

三地男生以多动、分裂强迫、抑郁、残忍等问题出现较多；女生以其它问题、违纪、分裂强迫、躯体诉述等多见。

The father that if work,mad father, love annoys, disposition is too indrawn the be short ofing that the father of Mu Ne, resign oneself to adversity causes father easily to love is broken; Communicate time effectively between father and son, Mu Zizhi to be less than a hour on average to wait a moment every week, it is the cause that causes the child to become addiction.

如工作狂的父亲、爱愤怒的父亲、性格过于内向木讷、逆来顺受的父亲都易造成父爱的缺失；父子、母子之间的有效沟通时间每周平均小于一小时等等，都是造成孩子成瘾的原因。

These are vandal proof and they come with a locking mechanism.

这是野蛮的证据，他们来到了锁机制。