锥度量空间中一类压缩映射不动点定理.

证明了一个在锥度量空间中的不动点定理,是最近Misako Kikkawa和Tomonari Suzuki的不动点定理的一个推广.     

k-拟A类算子的一些性质

若T∈B(H)满足T*k(|T2|-|T|2)Tk≥0,则称T是k-拟A类算子,其中k为某正整数;k-拟A类算子是A类算子.拟A类算子的进一步推广.首先给出了两个A类算子的乘积仍为A类算子的充分条件,其次研究了压缩的k-拟A类算子的一些性质.     

具有p-Laplacian算子的分数阶微分方程边值问题

在一定条件下,利用Banach压缩映射原理讨论了具有p-Laplacian算子的分数阶微分方程边值问题解的存在性和唯一性,得到了解存在和唯一的充分条件,并举例说明了结论的适用性。     

一类线性随机Volterra积分方程的数值方法

将Winner过程引入到经典的线性Volterra积分方程中,  得到一类线性随机Volttera积分方程. 研究这类随机积分方程解在平方可积空间中的存在性, 证明了在均方意义下解的唯一性, 并应用配置法构造了数值求解格式. 数值实验验证了理论结果.     

基于空间收缩的种群灭亡差异演化算法

为避免演化算法在求解多峰函数优化问题时对冗余空间的过度搜索，提高差异演化算法的搜索效率，提出一种新的基于空间收缩的种群灭亡差异演化算法(DEESC)，通过最优个体收缩可行空间，用均匀设计方法反复初始化种群，并且讨论了DEESC的主要参数敏感问题。     

求整体优化全部解的区间排除遗传算法

为了改善单纯遗传算法中的模式欺骗和早熟现象,应用区间算法和遗传算法的理论、方法构造了一种区间排除混合遗传算法,并采用二阶Lipschitz扩展作为检验极值的条件,用计算实例验证了本算法在一类整体优化问题中具有收敛到全部解的优良性能,检验条件简单、容易实现,明显提高了收敛的速度、可靠性,很好地解决了模式欺骗和早熟现象.     

Three Levels of Understanding of Special Relativity

1.IMRODUCTIONThefirstcompleteformulation(henceofunderstanding)ofspecialrelativity(SR)wasduetoEinsteinwhoPOstulatedtheinvarianceoflightspeedinvacuo.Thisassumptionappearedhighlynonintuitive.Actuallyitseemedabsurdthatafterhavingmeasuredthespeedofthelightemittedbyasource,oneshouldmeasurethesamevaluewhenapproaching(ordrivingawayfrom)thesamesourceoflight.ItwasthegreatmeritofMansouriandSexl[l]tohaveshownthatthelightspeedinagivendirectionisindependentofthereferencesystemSprovidedtheclocksofSbe…     

Tricyclic antidepressants antagonize prostaglandin (PG) E20induced contractions of the guinea pig ileum and hypomotility in the mouse

Summary The interactions of PGE₂ and 2 tricyclic antidepressants were tested both on the guinea pig ileum and motility in the mouse. PGE₂-induced contractions of the guinea pig ileum were irreversibly blocked by amitriptyline and desipramine. Chronic administration of amitriptyline and desipramine blocked PGE₂-induced hypomotility in the mouse.     

Cahn─Hilliard方程的近似惯性流形

本文讨论Ｃａｈｎ－Ｈｉｌｌｉａｒｄ方程解的长时间行为，通过压缩映象原理，对该方程构造了一个逼近惯性流形。     

The performance of the octopus circulatory system: A triumph of engineering over design

Summary Despite the very considerable difficulties presented by the basic molluscan anatomy and the possession of a blood pigment with an oxygen carrying capacity that never exceeds 4.5 vols%, the cephalopod circulatory system contrives to deliver oxygen at a rate fully comparable with that of an active fish. This is achieved by adding accessory pumps to push blood through the gills, by a multiplicity of pulsatile veins and by raising the systemic blood pressure considerably above the levels found in other molluscs. Detailed control of blood distribution is a necessity in a system where the peripheral resistences may be expected to change dramatically when the animal starts to move and large parts of the central nervous system are apparently dedicated to this task. In this account we have reviewed blood pressure and flow at rest and in exercise. We have further examined the evidence which indicates how the animals modulate the cardiac output, drawing attention to the very different response found in cephalopods and the higher vertebrates.