Au-Au碰撞中大横动量双轻子对的产生(英文)

运用微扰QCD讨论了重离子碰撞中大横动量轻子对的分布, 计算了Au-Au碰撞中两个部分子产生的轻子对的贡献。引入了轻子对产生的直接单光子过程和分解单光子过程。大横动量情况下的所有过程都包括在内, 而且考虑了核遮蔽效应和同位旋效应, 作为QGP背景的双轻子信号有了一个好的修正。The large transverse momentum distribution of lepton pairs produced in heavy-ion collisions has been studied, making use of the perturbative QCD. The contribution of the two parton production process into lepton pairs in Au Au collisions is calculated. Lepton pair production with the direct single photon process and the resolved single photon process are introduced. We believe that the photon processes are significant. The complete processes at large transverse momentum are included, and moreover, the effect of shadowing and isospin of nucleus are also considered in heavy ion collisions. Dilepton signals to regard the background of QGP have a good correction.     

二磺基苯基荧光酮光度法测定铝的研究和应用

研究了二磺基苯基荧光酮（ＤＳＦＦ）与铝的显色反应,在ＰＨ＝４．６ＨＡｃ－ＮａＡｃ缓部介质中,非离子型微乳液存在下,ＤＳＦＦ和Ａｌ（Ⅲ）生成２：１紫色络合物,λｍａｘ＝６１０ｎｍ,ε＝１．４３×１０＾５Ｌ·ｍｏｌ·ｃｍ＾－１。方法用于环境水样中铝的测定,结果满意。     

伪随机码光栅锐化光栅于涉仪条纹

本文报道了伪随机序列编码的光栅干涉仪,可以取得锐化条纹,给出了理论分析和实验结果.     

多复变数的二阶微分从属

在文[1－2]的基础上讨论了多复变数中的二阶微分从属，取得了一些结果。这些结果是文[1-5]中的一些结果的推广。     

某种一般非参数回归函数估计的强相合

本文研究了较为一般的非参数回归函数估计的问题.利用传输不等式,获得了参数估计的强相合性,推广了文献[1]、[6]等结果.     

关于非牛顿流体衰减性的一个注记

In the study of long time asymptotic behaviors of the solutions to a class system of the incompressible non-Newtonian fluid flows in R3, it is proved that the weak solutions decay in L2 norm at (1+t) and the error of difference between non-Newtonian fluid and linear equation is also investigated. The findings are mainly based on the classic Fourier splitting methods.     

Critical Behaviors in a Stochastic One-Dimensional Sand-Pile Model

A one-dimensional sand-pile model (Manna model), which has a stochastic redistribution process, is studied both in discrete and continuous manners. The system evolves into a critical state after a transient period. A detailed analysis of the probability distribution of the avalanche size and duration is numerically investigated. Interestingly,contrary to the deterministic one-dimensional sand-pile model, where multifractal analysis works well, the analysis based on simple finite-size scaling is suited to fitting the data on the distribution of the avalanche size and duration. The exponents characterizing these probability distributions are measured. Scaling relations of these scaling exponents and their universality class are discussed.     

平行双射流场纳米颗粒的形成与凝聚的研究

对平行双射流中H2SO4蒸气扩散进行了大涡模拟,给出了硫酸/水系统成核生成纳米颗粒及颗粒的凝聚过程中颗粒的分布特性,分析了燃料中硫的浓度、环境相对湿度以及射流Reynolds数对于颗粒浓度和粒径分布的影响．结果表明,硫酸/水系统会成核生成大量的纳米颗粒,在双管射流的中间和射流场周围,颗粒具有较高的浓度;颗粒的凝聚过程使颗粒的数量减少、直径变大;随着硫的浓度的增加,流场中的颗粒浓度有明显增加,而成核后形成的颗粒直径减小;环境湿度和Reynolds数的增大,有利于成核过程,因而导致形成更多的颗粒．     

高师“中学化学微格教学”课程评价教学改革

基于多元评价理论,在“中学化学微格教学”课程中先后尝试进行了如下改革：增加“自评”“组评”环节,调整“自评”“组评”和“师评”的权重,编制并逐年完善了“微格教学评分表（1.0/2.0/3.0）”,基本建立了评价目标多元、评价标准多元、评价主体多元、评价方式多元的多元评价体系。     

An Ultra Hydrophobic Y Zeolite Used In Hydrocracking Catalysts

An ultra hydrophobic Y zeolite is a new modified Y zeolite developed by Fushun Research Institute of Petroleum and Petrochemicals. The characteristics of this zeolite are higher crystallinity, smaller unit cell size, good hydrophobicity, higher ratio of silica to alumina in framework, higher surface area, more secondary pore and smaller non-framework aluminum.