GLOBAL ASYMPTOTIC STABILITY IN N-SPECIES COOPERATIVE SYSTEM WITH TIME DELAYS

ＧＬＯＢＡＬＡＳＹＭＰＴＯＴＩＣＳＴＡＢＩＬＩＴＹＩＮＮ－ＳＰＥＣＩＥＳＣＯＯＰＥＲＡＴＩＶＥＳＹＳＴＥＭＷＩＴＨＴＩＭＥＤＥＬＡＹＳ￥ＣＵＩＪｉｎｇ＇ａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＸｉｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙ，Ｕｒｕｍ...     

On the Parsimony of Some Model-Selection Criteria in Econometric Modeling

ＯｎｔｈｅＰａｒｓｉｍｏｎｙｏｆＳｏｍｅＭｏｄｅｌ－ＳｅｌｅｃｔｉｏｎＣｒｉｔｅｒｉａｉｎＥｃｏｎｏｍｅｔｒｉｃＭｏｄｅｌｉｎｇＺＨＡＮＧＷｅｉ；ＬＩＵＢａｏ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍＥｎｇｉｎｅｅｒｉｎｇ（ＩＳＥ），ＴｉａｎｊｉｎＵｎｉｖ...     

A SYNTHESIS METHOD FOR TWO-ORDER UNCERTAIN SYSTEMS: AUTO-STABLE REGIONAPPROACH

1.IntroductionInrecentyears,thesynthesisproblemforuncertainsystemshasbeendeeplystudied.ManymethodssuchasLyapunov,thevariablestructurecontrol,theadaptivecontrolandtherobustcontrolmethodshavebeenproposed[IMS].Sincetheadaptivecontrolandtherobustcontrolmethod…     

AN IMPROVEMENT ON JORGENS'S ASYMPTOTIC EXMNSION THEOREM FOR TRANSPORT EQUATION

1.IntroductionAfundamentalproblemintransporttheoryisthedeterminationoftheasymptoticbehaviorofthetimedependentsolution.In[if,Jorgenssystematicallyinvestigatedtheneutrontransportequationinafiniteconvexbodywithenergyboundedawayfromtheorigin,andgaveanasymptot…     

The Challenging Topics and Future Directions of the Research in Limnology and Watershed Sciences

Based on reviewing the problems in limnology and watershed sciences in meeting the national demands and the development of theories and methodology, this paper proposed some challenging topics to the sciences, covering the process of lake evolution and the quantitative analysis of human impacts, in -lake nutrient cycling an biogeo-chemical process, the process and mechanisms of material flow in lake-watershed system, digital watershed and the modeling of the surface process of lake -watershed, and ecosystem health and scientific management of lake-watershed.     

四川宝兴 大熊猫的故乡

在我国四川的北部,或者用另一种更为贴切的说法,在青藏高原的东缘,座落着一个小小的县——宝兴。它面积只有3100余平方公里,人口不足6万。然而在中国动物学研究史上,恐怕再难找出一个县,能够具有它那般显赫与辉煌。宝兴旧称穆坪,直到本世纪初才成为一个县。山高谷深是它自然地理上的最大特点:北部     

MeV Pb离子在非晶Si中的射程离散──离子束混合和增强扩散的影响

１．０ＭｅＶ２０８Ｐｂ离子在非晶Ｓｉ中的投影射程ＲＰ和射程偏差ΔＲＰ作为注量和温度二者的函数用背散射法进行测定．注量的变化范围为５×１０１３～７×１０１４ｃｍ－２．注入是在室温和ｔ＝－１２０℃下完成的．由由实验所确定的投影射程，射程偏差与注量或温度无关，并且分别等于２９５和７２．２ｎｍ．与ＴＲＩＭ８６的计算结果相比较，发现ＲＰ的偏离为１８％，而ΔＲＰ的偏离为３６％．ＲＰ和ΔＲＰ二者与注量及温度的无关性，排除了所观察到的与ＴＲＩＭ的矛盾是由于注入期间辐射增强扩散或离子束混合效应而引起的解释。     

影响遗传规划基因内区的因素分析

通过众多的试验和分析 ,证实遗传规划的个体中存在基因内区 ,它对进化的收敛既有积极作用也有消极作用 .文中通过对有关遗传操作方法和参数的研究 ,定性地分析了它们对基因内区的影响 ,并指出抑制基因内区消极作用的途径 .     

AVAILABILITY ANALYSIS OF THE QUEUEING SYSTEM GI/PH/I WITH SERVER BREAKDOWNS

In the existing literature of Repairable Queueing Systems (RQS), i.e., queueing systems with server breakdowns, it is almost all assumed that interarrival times of successive customers are independent, identically exponentially distributed. In this paper, we deal with more generic system GI/PH/1 with server's exponential uptime and phase-type repair time. With matrix analysis theory, we establish the equilibrium condition and the characteristics of the system, derive the transient and stationary availability behavior of the system.     

IS γα≤δ FOR GRAPHS WHICH HAVE DIAMETER TWO?

A subset of S of the vertex set of a graph G is called acyclic if the subgraph it induces in G contains no cycles. S is called an acyclic dominating set of G if it. is both acyclic and dominating. The minimum cardinality of an acyclic dominating set, denoted by 7a(G), is called the acyclic domination number of G. S. M. Hedetniemi et al. on 2000 introduced the concept of acyclic domination and posed the following open problem: Is -ya(G) < <5(G) for any graph whose diameter is two? In this paper, we give a counterexample which disproves the problem.