Influence of rarefaction wave on premixed flame structure and propagation behavior

To explore the influence of rarefaction wave on the structure and propagation behavior of the premixed propane/air flame in a rectangle combustion pipe, the techniques of high speed Schlieren photograph method, pressure measurement and so on are used to study the interaction processes between rarefaction wave and flame. Two cases of rarefaction wave-flame interaction were performed in the experiment. The experimental result shows that both the rarefaction waves can cause the flame transition from laminar to turbulent combustion quickly. The cowflow rarefaction wave decreases the flame speed, while the counterflow rarefaction wave leads the flame propagation speed to increasing on the whole, accompanied with sharp vibration.     

Algorithm of graph isomorphism with threedimensional DNA graph structures

ResearchonDNAcomputingwasinitializedin1994 ,whenAdleman[1] proposedamethodofsolvingasmallinstanceoftheHamiltonianPathproblembyalaboratoryexperimentinvolvingDNAmolecules .Later,Lipton[2 ] demonstratedhowalargeclassofNP completeproblemscouldbesolvedbyencodingtheprobleminDNAmolecules .Inparticular ,LiptonshowedonefamousNP problem ,theso called“satisfiability”problem (SAT)andsubsequentlytheotherNP problemscouldbeencodedandsolvedusingmolecules .TheadvantagesofDNAcomputingareitsmassivepa…     

MARKOV DECISION PROGRAMMING-THE FIRST PASSAGE MODEL WITH DENUMERABLE STATE SPACE

In this paper,we discuss MDP with discrete time parameter-the firstpassage model with denumerable state space.Under assumption A in this paper,we prove that an ε(>0)-optimal stationary policy exists.To find an ε-optimalstationary policy,an algorithm of policy improvement iteration and a method ofsuccessive approximations are given.     

Application of Mathematial-Simulated Model Setup for Eudcational Planning

ＡｐｐｌｉｃａｔｉｏｎｏｆＭａｔｈｅｍａｔｉａｌ－ＳｉｍｕｌａｔｅｄＭｏｄｅｌＳｅｔｕｐｆｏｒＥｕｄｃａｔｉｏｎａｌＰｌａｎｎｉｎｇＦＵＨｏｎｇｙｕａｎ（ＣｈｏｎｇｑｉｎｇＩｎｓｔｉｔｕｔｅｏｆＡｒｃｈｉｔｅｃｔｕｒｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ）Ａ...     

对盐铁会议的重新估价

西汉昭帝始元六年(公元前81年),由政府主持,召开了一个盐铁会议,讨论以盐铁官营为代表的现行政策。参加者分三个层次:一是政府要员,丞相车千秋和御史大夫桑弘羊。车千秋于开会后便行离去,桑弘羊成了这个层次的唯一代表。二是他们的属员丞相史和御史。这两个层次共同构成辩论者一方。三是贤良、文学,为辩论者的另一方。以桑弘羊为主的一方,主张继续施行由武帝时期延续下来的各项政策,而另一方,贤良、文学则主张改变。双方针锋相对,剑拔弩张。桓宽《盐铁论》记下了会议的情况。一些评论者以此为根     

广告谋杀了——中国企业战略批判

日前,在北京大学光华管理学院的一次论坛上,某著名经济学家语出惊人:“凡是广告做得太多的企业没有一个好下场！”并对“脑什么金”的广告卷土重来深恶痛绝。 这名清华教授所说的“中国的企业”显然是指“先人”南德、巨人、三株、505、太阳神、沈阳飞龙、爱多、秦池、厦新、亚细亚等等。他认为,这些企业之所以倒下,是因为策划人干的活太多了,而策划人干的活就是多做广告宣传……     

GENERALIZED SUBCONVEXLIKE FUNCTIONS AND MULTIPLE OBJECTIVE OPTIMIZATION

ＧＥＮＥＲＡＬＩＺＥＤＳＵＢＣＯＮＶＥＸＬＩＫＥＦＵＮＣＴＩＯＮＳＡＮＤＭＵＬＴＩＰＬＥＯＢＪＥＣＴＩＶＥＯＰＴＩＭＩＺＡＴＩＯＮ￥ＹＡＮＧＸｉｎｍｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＣｈｏｎｇｑｉｎｇＮｏｒｍａｌＵｎｉｖｅｒｓｉｔ...     

TWO BOUNDARY VALUE PROBLEMS FOR THE REGULAR FUNCTIONS WITH VALUES IN A REAL CLIFFORD ALGEBRA IN THE HYPERBALL

ＴＷＯＢＯＵＮＤＡＲＹＶＡＬＵＥＰＲＯＢＬＥＭＳＦＯＲＴＨＥＲＥＧＵＬＡＲＦＵＮＣＴＩＯＮＳＷＩＴＨＶＡＬＵＥＳＩＮＡＲＥＡＬＣＬＩＦＦＯＲＤＡＬＧＥＢＲＡＩＮＴＨＥＨＹＰＥＲＢＡＬＬＨＵＡＮＧＳｈａ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，...     

MD Method in Solving Multiple Criteria Decision Problems Arising from Investment Systems

ＭＤＭｅｔｈｏｄｉｎＳｏｌｖｉｎｇＭｕｌｔｉｐｌｅＣｒｉｔｅｒｉａＤｅｃｉｓｉｏｎＰｒｏｂｌｅｍｓＡｒｉｓｉｎｇｆｒｏｍＩｎｖｅｓｔｍｅｎｔＳｙｓｔｅｍｓＤＵＷｅｎｚｈｏｎｇ;ＣＩＪｉａｎｈｕａ（ＥｃｏｎｏｍｉｃＩｎｆｏｒｍａｔｉｏｎＣｅｎｔｅｒｏｆ...     

基于温度场的变速箱系统动力学分析

该文针对温度场对于变速箱系统的影响，建立了变速箱系统倒档工况的动力学分析仿真模型；应用有限元计算了箱体在不同温度下的变形；采用ADAMS软件分析了不同温度场下含间隙的齿轮系统的工作状况，并进一步分析了温度场对于整个变速箱系统的影响,为变速箱系统的设计提供了技术参考。