pushed by these factors, american national tpd standards have since 1980's experienced three rough phrases, preparation, formation and systemization, each of which varies in its mission and products 美国教师专业发展的国家标准是美国教育学界争取专业地位、教育经济主义思潮与基础教育危机相互作用、教师专业发展理论以及美国政府的介入和推动共同作用的结果。
the process is the inverse problem for computing the value of topological indices for a given ( known ) molecular graph . the inverse problem plays an important role in the field of drug design and molecular systemization 这一过程是给定一分子图求其拓扑指标值的逆问题,对它的深入研究对有目的地合成分子或药物有至关重要的指导作用,因此具有重要的理论价值和应用背景。
it is a problem in grade-2 supply chain . secondly, it is the crux of this kind of matter to solve inventory and transportation . the problem of the inventory and transportation integrated optimization addresses the point of systemization and integration 因此,本文将销售物流系统中两个重要环节,即库存控制与运输路径优化合到一个大问题当中,寻找这个联合问题而非其中某个问题最优的解决方案。