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素有“北国之春”的长春市,春季干燥多风,夏季湿热多雨,秋季天高气爽,冬季寒冷漫长;年平均气温4.8℃,最高温度39.5℃,最低温度可达-39.8℃。在这漫长的冬季里,如何保障公交车辆安全正常运营,是公交企业技术保障工作的重点之一。 相似文献
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行为畸胎学是形成不久的一门交叉学科。它根据畸胎学原理,运用实验心理学方法对致畸原进行深入的研究。目前,随着行为毒理学、行为药理学方法的完善,行为畸胎学也引起越来越多的重视。本文试就行为畸胎学的基本含义、发展简史、动物实验方法,以及有害因素的行为致畸作用研究作一简单的介绍。 相似文献
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This paper informally introduces colored object-oriented Petri Nets(COOPN) with the application of the AUV system. According to the characteristic of the AUV system's running environment,the object-oriented method is used in this paper not only to dispart system modules but also construct the refined running model of AUV system,then the colored Petri Net method is used to establish hierarchically detailed model in order to get the performance analyzing information of the system. After analyzing the model implementation,the errors of architecture designing and function realization can be found. If the errors can be modified on time,the experiment time in the pool can be reduced and the cost can be saved. 相似文献
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