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1)  Tough constraint
Tough型约束
1.
Data mining of frequent closed itemsets with Tough constraint;
Tough型约束下的频繁闭项集挖掘
2)  constraint model
约束模型
1.
The description is based on constraints and called constraint model, which is defined by the features that satisfy a definite constraint set.
模型描述是基于约束的,故称为约束模型,并定义为满足一定约束关系集的特征集合。
2.
Aiming at the sequencing workingsteps on machining center,by taking the assistant machining time as the optimization object,a constraint model is established based on polychromatic sets theory,where the contour matrix is used to formalize the conditioned restrictions visually and comprehensively.
针对加工中心上的工步排序问题,以辅助加工时间最短为优化目标,基于多色集合理论建立了问题的约束模型。
3.
As an indispensable part in any CAD systems, technology concerning constraint modeling is highly emphasized, and many useful solutions have been raised which encourage the reform and application of CAD systems.
为了能够正确地维护设计者的设计意图和满足用户的需求,本文在原系统的基础之上,提出了一种语义特征约束模型。
3)  restrained type
约束类型
4)  constrained model
约束模型
1.
This paper presents a method to establish a 2-D geometrically constrained model, and to realize the modification of topologic relation of geometric models.
本文提出了二维几何约束模型的建立及几何模型拓扑关系可迁移性的实现,并具有不依赖于作图过程的可变性修改的特点。
5)  type constraint
类型约束
6)  model constraint
模型约束
1.
An algorithm based on fractal codes and model constraint is proposed in this paper.
本文提出一种基于分形码和模型约束的图像放大算法,分形码能够包含图像的空间信息和图像本身的自相似信息,模型约束能够有效的限制放大引入的误差。
补充资料:super tough polyoxymethylene
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性质:混有少量弹性体,冲击韧性优良的聚甲醛共混物。(悬臂梁)缺口冲击强度为纯聚甲醛的7倍,无缺口冲击强度则为30倍;甚至比聚碳酸酯还高10倍。断裂伸长率200%。吸水性小,尺寸稳定性好;耐环境应力开裂性优于聚碳酸酯。拉伸强度(45.1MPa)和弯曲模量(1380MPa)虽不及纯聚甲醛,但在动态环境下耐疲劳性大大增加。由聚甲醛树脂与弹性体混合均匀制得。其成型加工因素对性能的影响较纯聚甲醛大。主要用作苛刻条件下运转的精密部件、传动部件、滑动部件、各种连接器、紧固件等。用于汽车工业和机械制造业。还可用作安全帽、运动器械和特种拉链等。   

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