可创建简单的约束表达式，用简单条件检查数据；
You can create a simple constraint expression to check data for a simple condition;
约束表达式的灵活性给模型带来强大的功能和适应性。
The flexible of expression brings the model capability and adaptability.
还存在一个包含智能能力的SQL编辑器控件，用于编辑检查约束表达式。
There is also a SQL editor control that contains intellisense capabilities to edit the check constraint expression.
约束模式[7]是可以被例化并随后配置的，用于简洁地开发约束的预定义的约束表达式。
Constraint patterns 7 are predefined constraint expressions that can be instantiated and subsequently configured for developing constraints in a concise way.
当希望移除对在约束表达式所包含的列或列组合中输入的值的唯一性要求时，可删除唯一约束。
Delete a unique constraint when you want to remove the requirement for uniqueness for values entered in the column or combination of columns included in the constraint expression.
为了解决这个问题，给出了直接分类模式、树分类模式、分类法则和科目约束表达式等概念和形式化定义。
To solve the problem, the concepts and formal definitions including direct classification schema, tree classification schema, classification rule, and family constraining expression were presented.
由于可以为约束表达式设置任何任意的属性值(包括您自己定义的值)，或者在约束中使用它，因此存在很多可能。
Since you can set any arbitrary attribute value (and yes, that includes values that you define) to a constraint expression or use it in a constraint, there are a lot of possibilities.
对于Laszlo中的任何属性，都可以为之赋予一个约束表达式(constraintexpression)，而不是赋予一个标准的值。
For any attribute in Laszlo, you can assign a constraint expression instead of a standard value. Constraint expressions begin with a dollar sign, and have the following format.
利用间隔之间的约束关系，可以根据已压缩的XML数据评估路径表达式。
Using the containment relationships among the intervals, path expressions are evaluated on compressed XML data.
提示：所有约束和显示模式都由正则表达式来设置。
TIP: All constraints and display patterns are set by regular expressions.
虽然语言具有语义约束，但对于表达式的构造方式却没有施加语义约束。
No syntactic constraints are imposed on the ways in which expressions can be composed (though the language does have some semantic constraints).
定义：通过将绑定表达式用作定位器，“绑定”将实例数据结点连接到表单控制或模型项目约束。
Definition: a "binding" connects an instance data node to a form control or to a model item constraint by using a binding expression as a locater.
另一个困难是如何有效地计算目标满意度和约束满足度表达式中的多重积分。
Another problem is how to calculate the multiple integration in the expression of the satisfactory degrees of objective and constraint.
文章给出了约束资本预算优化模型的一般数学表达式。
This paper provides the general mathematics formula of constraint optimization model of capital budgeting.
通过将绑定表达式用作定位器，“绑定”将实例数据结点连接到表单控制或模型项目约束。
A "binding" connects an instance data node to a form control or to a model item constraint by using a binding expression as a locater.
阐述了此方法的具体实现，给出了表达式LRAUC单路测试约束集构造算法。
The realization of the method is described, and the algorithm to construct the constraint set of expression LRAUC single-path testing is given.
对于新约束，必须在关闭此框之前指定表达式。
For new constraints, you must specify the expression before you close this box.
首先讨论子阵约束下实矩阵反问题的最小二乘问题，给出了解的一般表达式。
Least-squares problem of the real matrices is discussed and the expression of general solution is given.
本文利用统计学中线性模型的理论给出一类等式约束二次规划问题解的表达式。
In this paper, using the theories of linear model in the statistics, we can give the general expression on solution of a class of equality constrained quadratic programs problem.
该表达式必须标识其内容或值用于约束的单个元素或特性。
This expression must identify a single element or attribute whose content or value is used for the constraint.
当线性规划约束条件的右端向量在一定范围内变化时，目标函数的最优值是右端向量的一个复杂的分片线性函数，但通常难以给出分析表达式。
The optimal objective value is a complicated piecewise linear function of the right-hand-side vector of the constraints, and its analytical expression is normally hard to obtain.
本文详细介绍了用户角色自动指派的组成模型、用户状态迁移、属性表达式规则、约束以及某电子书店系统中的角色自动指派实例。
This article describes the component of AURA, the transition of user-state, the attribute express, constraint and an instance of AURA in an electronic bookstore.
该数学表达式表现为一个具有非线性目标函数及线性与非线性约束条件的大规模0 - 1规划问题。
This formulation results in a large scale 0-1 programming problem with nonlinear objective function and linear or nonlinear constraints.
该参数化方法给出了该类观测器增益矩阵的参数化表达式，其所含参数除了满足两个约束条件之外是完全自由的。
The method presents the parametric expression for the gain matrix of the high-order PI observer. The contained parameters satisfy the needs of two constraints and are completely free as well.
为该约束指定表达式后，该约束才生效。
The constraint will not become valid until an expression is specified for the constraint.
该模型引入复合属性表达式和复合权限的概念，制定授权约束规则，为用户分配多组角色。
It introduces notions of composite attribute expression and composite permission, defines different multiple role groups and makes a finite set of rules to assign user to roles.
该模型引入复合属性表达式和复合权限的概念，制定授权约束规则，为用户分配多组角色。
It introduces notions of composite attribute expression and composite permission, defines different multiple role groups and makes a finite set of rules to assign user to roles.
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