平面上Volterra型随机微分方程解的轨道惟一性

In this paper we prove the pathwise uniqueness of a kind of two-parameter Volterra type stochastic differential equations under the coefficients satisfy the nonLipschitz conditions. We use a martingale formula in stead of Itǒ formula, which leads to simplicity the process of proof and extends the result to unbounded coefficients case.     

SU（3）F Meson Mass Formula from Random Phase Approximation

We present an SU(3)F meson mass formula from random phase approximation. Both the mesons of ground-state pseudoscalar octet and ground-state vector octet are described quite well by this mass formula. We also estimate the current and constituent quark masses from the naive quark model and the PCAC relation.     

沥青砼路面的早期病害类型及防护措施

在现代化公路建设中，沥青混凝土路面凭借着自身的发展优势越来越被道路建设者们广泛应用，在个别省市的未来建设规划中，正逐步代替以往占据着主导地位的水泥混凝土路面，为人民的出居起行提供更多快捷方便。因此，沥青路面使用质量的好坏关乎社会大众，对此，研究沥青路面的破损特别是早期破损具有的重要意义。     

Moessbauer Investigation of the Ferromagnetic Coupling in Copper-Iron Polycyanides

One of the Prussian blue analogs, molecular magnet Cu3^Ⅲ [Fe^Ⅲ (CN)6]2.11.6H2 O, was investigated by Moessbauer spectroscopy. It was found that transition temperature was around Tc = 18.5 K from paramagnetic phase to ferromagnetic phase. The β value of the critical exponent is around 0.338 at magnetic ordering temperature.Therefore, the ferromagnetic coupling interaction of Cu-Fe cyanide could be clearly explained by spin wave theory.     

Time—Resolved Photoluminescence Studies of AlInGaN Alloys

We study the two samples of AlInGaN,i.e.,1-μm Gan grown at 1030℃ on the buffer and followed by a 0.6μm-thick epilayer of AlInGaN under the low pressure of 76 Torr and the AlInGaN layer deposited diectly on the buffer layer without the high-temperature GaN layer,by temperature-dependent photoluminescence(PL) spectroscopy and picosecond time-resolved photoluminescence(TRPL) spectroscopy.The TRPL signals of both the samples were fitted well as a stretched exponential decay at all temperatures,indicating significant disorder in the material.We attribute the disorder to nanoscale quantum dots or discs of high indium concentration.Temperature dependence of dispersive exponent β shows that the stretched exponential decay of the two samples comes from dfferent mechanisms.The different depths of the localization potential account for the difference,which is illustrated by the results of temperature dependence of radiative recombination lifetime and PL peak energy.     

均匀分层介质中标准矢量波函数的构成

研究了在均匀分层介质中构成标准矢量波函数的必要条件。研究结果表明在均匀分层介质中构成标准矢量波函数一般需遵循Morse-Feshbach判据外，领示矢量只能选取与折射率变化方向一致的那根坐标轴单位矢量。但在某些特定的条件下，对领示矢量的选取条件可以放宽为只需遵循Morse-Feshbach判据即可。     

饲育条件下Semisulcospiens decipiens的生长

在饲育温度条件下研究了Ｓ．ｄｅｃｉｐｉｅｎｓ的生长和产仔数及与饲育水温的关系。结果表明水温在上升期和下降期，新生贝和稚贝的生长速度较快，产仔数也较多．成体贝在水温１１℃～２９℃时，都可产出新生贝，以１８℃～２４℃时产出较多．在高温饲育条件下，成体贝的生长速度缓慢。     

等径管道的三维重建

由轮廓线重建物体的现有方法，不能准确地恢复原有管道的形状．本文提出了一种等径管道的三维重建方法，能较为准确地恢复原管道的三维结构．     

承担荒诞与皈依基督——加缪《局外人》与北村《孙权的故事》比较

本世纪40年代,加缪《局外人》曾经在二战后欧洲的青年人中激起强烈共鸣。莫尔索冷漠、孤傲的形象既是对社会的否定,也是对荒诞现实的反抗。90年代,面对中国价值失范、人欲横流的现实,先锋小说家北村在《孙权的故事》中对自我和社会进行了双重批判,并在批判中导向一种截然相反的对神性的皈依。本文拟从平行研究的角度分析这种差异的深层原因。 1 每个时代都有自己特定的环境和矛盾,也都有自己占主导地位的哲学。存在主义哲学是通过大量的文学作品为人熟知的。《局外人》作为存在主义的经典之作,既反映了个体在社会中所处的孤独无援的处境,又反映了人在不合理的,充满敌意的世界里的荒诞感受。 从《局外人》产生的时代背景看,资本主义发展初期由科学理性引发的乐观自信随着时间的流逝渐渐消失。经济危机、法西斯的残暴、世界大战等社会疾病使得整个欧洲大陆笼罩一层悲观、失望、孤独、绝望的气氛。存在主义哲学正是资产阶级文明遭到严重冲击的产物,它作为危机时代的反映被称为危机哲学,曾经给人们提供某种可靠保证的社会的、政治的、经济的、精神的保证纷纷瓦解。这一时代也是尼采所谓“上帝之死”的时代,旧有的神性根基已经打破。人们终于意识到,在一个混乱、崩溃的世界里只有自己才可以依靠,人的本     

PROFILE MINIMIZATION PROBLEM FOR MATRICES AND GRAPHS

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