偏序集合

Then, the problem of using yard engines becomes the problem of directed paths decomposition for directed graph.

通过分析运用调机时区集合上的偏序结构特点，可以知道使用调机问题的实质是偏序集合的全序分解问题。

To solve this problem,this paper presents a new incremental algorithm for building concept lattice based on an ordered set direct product operation,this algorithm is suitable for the case of the insertion of a set of objects into the context,and it can construct the Hasse diagram of the concept lattice while generating the concept.

为了适应这种情况，基于偏序集的直积运算，提出了一种新的增量式概念格构造算法，这种算法可以一次性地加入一个对象集合，而且在生成概念的同时，能够构造出概念格的Hasse图，从而完全解决了上述问题。

Finally,through some ideas from Algebraic Geometry,we constructed strongly exceptional collections of derived sheaf categories,and solved the problem that equivalences between some posets.

最后，通过代数几何里的一些思想，我们构造了导出层范畴的强例外集合，解决了一类偏序集的等价问题。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。