Compact, Low Threshold Nd^3＋：YVO4 Self-Raman Laser at 1178 nm

A compact low-threshold Raman laser at 1178 nm is experimentally realized by using a diode-end-pumped actively Q-switched Nd^3＋ ：YVO4 self-Raman laser. The threshold is 370mW at a pulse repetition frequency of S kHz. The maximum Raman laser output is 182 m W with the pulse duration smaller than 20 ns at a pulse repetition frequency of 30kHz with 1.8 W incident power. The optical efficiency from the incident power to the Raman laser is 10% and the slope efficiency is 13.5%.     

分数布朗运动模型中贝叶斯估计的渐近正态性

本文研究了由分数布朗运动驱动的线性随机微分方程中贝叶斯估计的渐近趋势．利用分数布朗运动的随机积分理论和Girsanov公式，得到了在平方损失函数下贝叶斯估计的渐近正态性．     

激光分子束外延和关键技术研究

较为系统地介绍了一台激光分子束外延的总体结构和关键技术研究 .同时使用该设备和技术 ,实现精确控制原子尺度外延生长 ,获得原子尺度光滑表面的氧化物外延薄膜等实验结果 .     

Baryon Ratios in Quark-Gluon Plasma

A way to calculate ratios of baryon produced from quark gluon plasma in relativistic heavyion collisionsis presented. It is assumed that at the beginning of the hadronization there are diquarks and anti-diquarks in the quarkmatter. The number of three-quark states is distributed between the corresponding multiplets, and hadronic decays aretaken into account. The results are shown at last.     

手征介质构成的面心立方光子晶体光子带结构计算

提出通过磁场分量计算手征介质组成的光子晶体光子带结构的平面波法．计算表明：手征介质“球形原子”在介电体中排列所组成的面心立方光子晶体和介电体“球形原子”在手征介质中排列所组成的面心立方光子晶体的光子带结构，均存在截止频率，在该频率以下无传播模存在．并与由电场分量计算的结果作了比较，讨论了出现差异的原因 关键词：     

多孔硅的一种新的后处理方法──微波等离子体辅助钝化处理

报道了对多孔硅进行后处理的一种新方法，即真空中微波等离子体辅助的钝化处理．傅里叶变换红外吸收谱表明，经处理的样品表面主要是被SiS_x和SiO_y所覆盖．与未经处理的样品相比，其发光强度增加约3.5倍，PL峰位蓝移了40nm，而且在空气条件下存放60d后发光强度没有变化．表明这种方法是增加多孔硅发光强度和提高稳定性的有效方法之一．     

Hydrodynamic Evolution of Spherical Fireball in Relativistic Heavy Ion Collisions

Evolution process can be calculated from the relativistic hydrodynamic equation with certain estimatedinitial conditions about a single spherical fireball here. So one can estimate a kind of initial condition qualitatively witha possible energy density about ε0 ≈ 1.9 GeV/fm3, and to fit the experimental data at thermal freeze-out based on thisprocess. The evolution from a cylindrical fireball is discussed simply.     

Pulsewidth Characteristics of Mode-locked Ti:sapphire Laser with Ring Cavity Kerr-lens

SupportedbytheYoungTeacher'sFoundationfromtheStateCommissionofEducationl.Intr0ductionInordert0investigatethefL1nctionoftheKerr-lcnseffectthatiscontainedinselfphasemodulati0n(SPM)terIn,x"ce113pIoythenon1incarSchrodingerequation(NLSE)totreatthepulsePropagationint[1cTi:s:1l7PhirerodandconsidcrthefourPrislnsequencetocompensatethcsccondortlcrLlisl7crsion(G\'D)int[1c1'ingcavityconfiguration[1].llysatisfyingtheself-consistentcon相似文献   

LARGE SAMPLE PROPERTIES OF THE SIR IN CDMA WITH MATCHED FILTER RECEIVERS

The output signal-to-interference (SIR) of conventional matched filter receiver in random environment is considered. When the number of users and the spreading factors tend to infinity with their ratio fixed, the convergence of SIR is showed to be with probability one under finite fourth moment of the spreading sequences. The asymptotic distribution of the SIR is also obtained.     

在有交互作用下上海、伦敦期货市场铜期货价格引导关系的研究

传统的两变量引导关系模型一般仅仅考虑到自变量（包括即时与滞后因子）对因变量独立的引导作用，往往忽略了因素之间（自变量与自变量，自变量与因变量之间）交互作用对因变量产生的影响，本文提出了一种改进的引导关系模型，在传统模型的基础上添加一个交互项来刻画因素之间的交互作用对因变量所产生的影响，并对上海期货交易所和伦敦金属交易所铜期货价格之间的引导关系做了实证分析，得到一些有意义的结果，并且改进后的模型较之传统模型检验的拟合度和精确度都有一定的提高。