排序方式： 共有12条查询结果，搜索用时 328 毫秒
1.
YU Guang-wei ZHU Qin XU Li-sheng School of Electromechanical Engineering Automation Shanghai University Shanghai China 《上海大学学报(英文版)》2000,(Z1)
1 IntroductionIn the design of blowing machine, the crihcalrotational speeds should keel away from the runningspeed. Because of lacking qualified techllical tools, someunits still use tWo aPProxilllstC methods tO calculate thecritical rotational speeds. One is to estimate the criticalspeeds according to analogous method, and the Other is asfollows. First, the hydrodynamic bearings are regarded asa rigid suPPort tO calculate the natUral frequencies. Then,a weight coefficient according tO t… 相似文献
2.
基于模糊Smith串级复合控制的温室加热系统仿真研究 总被引：2，自引：0，他引：2
本文针对玻璃温室加热系统大迟延、参数时变、多扰动等特点,对典型ＰＩＤ串级复合控制系统加以改进,提出了模糊Ｓｍｉｔｈ串级复合控制策略．仿真结果表明,该控制策略能有效克服大纯滞后对控制系统稳定性的影响,且具有动态性能好,鲁棒性强的特点． 相似文献
3.
In this paper,a discussion on the new polynomial-time algorithm for linearprogramming as proposed by Karmarkar.N.is presented.The problem is solved when aninitial feasible solution is unknown.For the case where the optimum value of the objectivefunction is unknown,the reasonableness and feasibility of the sliding objective functionmethod are proved.And a method of modifying the parameters is put forward. 相似文献
4.
王国霞 《中国教育技术装备》2011,(30)
就在实验教学过程中成立研究小组实施个性化教学以培养学生创新意识和创新能力进行探讨,讨论该教学方法执行的各个方面,包括成立研究小组的目的、原则、组织方法、实施过程等,同时给出研究小组带来的实际效果,以验证该教学方法的有效性。 相似文献
5.
1 Introduction Colorharmonyisanimportantwaynotonlyinachievingaestheticmeasureofcolorcompositions ,butalsoincreatingmessagecontextforcolorcompositionpurposes.Themoderncolorharmonytheorydealswithcolordesignproblemsinindustrialproductswithquantitativeandrationalengineeringmethods ,whichisnecessaryintothedevelopmentofproductivity .Thestudyofcolorharmonyaestheticmeasureisnotonlyapsychologicalsubjectbutalsoanengineeringsubject.Withthedevelopmentofproductivity ,therequirementofproductdesigngoesbeyo… 相似文献
6.
提出基于工程背景知识的工程图学教学改革的方法,培养创新型工程技术人才的教改思路。首先从分析图学教育发展的历史与现状入手,站在全局的观点和战略的角度,指出现有图学教学方法的弊端;接着给出了将工程背景知识引入到图学教学改革的具体思路,主要通过知识点的引入、课件的制作、相关视频的剪辑、计算机造型软件的应用和相关实验室现有设施和相关课题组的研究成果渗入五个环节的改革,使学生了解所学知识点的具体目的,达到课程内容和教学方式符合生产实际的需求和技术发展趋势。实践证明通过该种方式,能够激发学生学习的积极性和主动性,促进学生努力探索积极思考,取得了较好的教学效果。 相似文献
7.
光传系统是针对传统电传操纵系统的不足提出的一种新型的飞控系统;飞控系统的高可靠性是飞行安全的重要保证,当飞机出现故障或者遇到意外损伤时,飞控系统能够快速地对故障进行诊断和隔离,对于保证飞机飞行任务的继续执行或者安全返航具有重要意义。文章针对三余度光传系统的常见故障,提出了一种基于概率神经网络（PNN）的故障诊断方法;并且建立了三余度光传系统仿真模型和常见故障的产生模块,应用概率神经网络进行系统的故障诊断;最后通过仿真诊断实例,证明了方法的有效性。 相似文献
8.
XU Jing-jing WU Yi-min School of Electromechanical Engineering Automation Shanghai University Shanghai China 《上海大学学报(英文版)》2000,(Z1)
l lgtroductionIt is well known that the safety of pipeline systemsfor transpofting oil or gas is very important in the oil orgas industry, and it will be a catastTophe if an accidentoccurs. Howevef, there are a lot of methods for ensuringthe safety of such pipeline systems, for instance,TopRAM program['] (TransCanada Pipeline RiskAssessment Model), IAP program['] (The integrityAssessment Program), In-line inspection tools for crackdetection in gas and liquid pipeline['l etc. The safety … 相似文献
9.
10.
SHEN Xue-jin ZHU Li-jin CHEN Xiao-yang School of Electromechanical Engineering Automation Shanghai University Shanghai China 《上海大学学报(英文版)》2000,(Z1)
Nomenclature6r, e4, cp, cab -- process capability index,S -- actUal standard deviation,TU -- uPPer specification limit,TL -- lower specification limit,S -- estimated standard deviatinn,R -- average of the subgnup r'anges,dZ -- factor for the subgrouP size,K -- skewness,X -- distribution center ofqWhlity,M -- c~ of tolerance,X. -- individual value,n -- nUmber ofmeasuremed.1 IntroductionThe objective of quality control is tO provide thecustomer with the best Product at a minimum cost. Th… 相似文献