乘积空间上的Z2＊Z2—指标理论

本文针对Ｚ２＊Ｚ２群在乘积空间上的自然作用定义一种新的指标。这种指标满足通常指标的一般性质，但不满足维数性质，作为个指标的应用，我们还给出了两个抽旬有的临界点定理。     

Periodic Solutions to a Kind of Second Order Neutral Functional Differential Equation in the Critical Case

In this paper, the authors consider the existence of periodic solutions for a kind of second neutral functional differential equation as follows：（x（t） - cx（t -τ）＂ = g（t, x（t - μ（t））） ＋ e（t）,in the critical case ｜c｜ = 1. By employing Mawhin＇s continuation theorem and some analysis techniques, some new results are obtained.     

随机无穷点集上欧几里德最小扩张树的自包含性

本文证明好的欧氏空间无穷点集上最小扩张树的自包含性．应用上述性质,以及AlexanderK．S．[1]中有关二维Poisson连续渗流的结果,我们给出二维情形AldousD．和SteeleJ．M．[2]之猜想的一个新证明,区别于AlexanderK．S．[3]对上述猜想的排除法证明,我们直接证明它,显然,我们的证明更简单．对Poisson连续渗流,得到其二维临界值相对于Poisson最小扩张树的一个刻画;最后我们给出上述临界值相对于点渗流临界值的一个上下界估计。     

LP问题的K算法

本文给出了求 LP问题最优解的λ算法 ,并指出了此法旋转运算的次数 .此算法不需要基本可行解或对偶基本可行解 .     

肿瘤免疫无标度网络模型平衡点存在性及应用

应用无标度网络,建立肿瘤-免疫网络模型,来刻画免疫效应细胞、肿瘤细胞与细胞因子相互作用的机理。研究了网络模型的肿瘤平衡点在免疫效应细胞与细胞因子度关联与度非关联两种情况下的存在条件.得到了根据所得到的肿瘤平衡点存在的临界值,根据临界值提出免疫途径与方法,为抑制或预测肿瘤生长提供的理论参考.     

两个粒子接触一一排它混合模型的局部遍历性

本文研究两个粒子接触一一排它混合模型的局部遍历性,证明了临界值δc的存在性,并对δc的上下界作了粗略的估计。同时证明了在δ〉δc的条件下该模型即为排它过程。     

Control of random sensitivity Boolean networks via of Boolean functions

In this paper, we discuss how to transform the disordered phase into an ordered phase in random Boolean networks. To increase the effectiveness, a control scheme is proposed, which periodically freezes a fraction of the network based on the average sensitivity of Boolean functions of the nodes. Theoretical analysis is carried out to estimate the expected critical value of the fraction, and shows that the critical value is reduced using this scheme compared to that of randomly freezing a fraction of the nodes. Finally, the simulation is given for illustrating the effectiveness of the proposed method.     

Chiral Magnetic Effect and Chiral Phase Transition

We study the influence of the chiral phase transition on the chiral magnetic effect. The azimuthal charge-particle correlations as functions of the temperature are calculated. It is found that there is a pronounced cusp in the correlations as the temperature reaches its critical value for the QCD phase transition. It is predicted that there will be a drastic suppression of the charge-particle correlations as the collision energy in RHIC decreases to below a critical value. We show then the azimuthal charge-particle correlations can be the signal to identify the occurrence of the QCD phase transitions in RHIC energy scan experiments.     

Thermodynamics of Third Order Lovelock Anti-de Sitter Black Holes Revisited

We compute the mass and temperature of third order Lovelock black holes with negative Gauss-Bonnet coefficient α₂<0 in anti-de Sitter space and perform the stability analysis of topological black holes. When k=-1, the third order Lovelock black holes are thermodynamically stable for the whole range r₊. When k=1, we found that the black hole has an intermediate unstable phase for D=7. In eight dimensional spacetimes, however, a new phase of thermodynamically unstable small black holes appears if the coefficient \tilde{\alpha} is under a critical value.For D≧ 9, black holes have similar the distributions of thermodynamically stable regions to the case where the coefficient \tilde{\alpha} is under a critical value for D=8. It is worth to mention that all the thermodynamic and conserved quantities of the black holes with flat horizon do not depend on the Lovelock coefficients and are the same as those of black holes in general gravity.     

球壳的环向剪切屈曲

通过球壳微元初始屈曲的微分几何分析,推导出一组新的精确的屈曲分支方程,并且应用Galerkin变分法研究铰支球壳承受环向剪切力时的整体稳定性,构造了接近分支点变形状态的屈曲模式,首次求得了从扁球壳到半球壳大范围内的扭转屈曲临界特征值,临界荷载强度和临界应力.