关于KdV方程中Hamilton算子序列的计算

文章研究了确定KdV方程的相应Hamilton算子序列显式表示的各种计算机符号运算问题.利用算子序列的显式表示和Mathematica软件计算得到Hamilton算子序列前六项的具体表达式,其结果可适用于一般情形,对进一步研究Hamilton算子序列及其相应水波方程具有指导作用.     

断裂物理力学性质对其附近地应力场的影响

应用离散元方法，分别研究了断裂刚度、内摩擦角、内聚力和几何形态等对其附近地应力场的影响。结果表明：这些因素对断裂附近的地应力场均有不同程度的影响，能造成主应力方位和量值发生变化；这种变化主要限于断裂附近一定距离内，远离断裂，逐渐趋于与区域应力场一致；断层附近应力方位变化的幅度和发生变化的范围，是因断层的力学性质及几何形态等的不同而不同。认为断层的内摩擦角（Φ）对断层附近应力方位变化的范围和幅度影响最大。     

Tobacco curly shoot virus iso-lated in Yunnan is a distinct species of Begomovirus

Virus isolate Y1 was obtained from tobacco showing curly shoot symptoms in Baoshan, Yunnan Province. Whitefly transmission test and virion morphology observation showed that it is a begomovirus. In reactions with 14 monoclonal antibodies raised against begomoviruses, Y1 was readily differentiated from begomoviruses reported in China, Pakistan and India. The complete nucleotide sequence of DNA-A was determined, it contains 2746 nucleotides, with two ORFs in virion-sense DNA and four ORFs in complementary-sense DNA. Comparisons with total DNA-A, intergenic region and deduced amino acid sequences of individual ORFs showed that Y1 is a distinct Begomovirus species, for which the name Tobacco curly shoot virus (TCSV) is proposed. The total DNA-A of TCSV is most closely related to that of Tomato leaf curl virus from India (85% sequence identity). In contrast, the deduced coat protein of TCSV is most like that of Cotton leaf curl virus 72b isolate from Pakistan (98% amino acid sequence identity).     

禁止字方法在元胞自动机中的一个应用

给出了使用禁止字理论、计算机搜索和符号动力学研究初等元胞自动机演化语言的一种方法，并且使用该方法得到了27号初等元胞自动机演化语言在数学上的精确描述．     

沥青混合料微观力学分析综述

针对当前沥青混合科研究方法的局限性，分析了国内外该领域的研究现状与存在问题。介绍了沥青混合料数字化方法及常用的力学分析方法。给出了运用微观力学方法研究沥青混合料的基本思路，即以二维和三维混合料数字图像为基础，数字重构沥青混合料微观结构，研究基于微观力学的沥青混合料集料接触模型，建立基于离散元的混合料微观空间结构的力学模型，应用离散元方法和微观力学理论分析该模型在劲度模量试验中的力学行为，进行沥青混合料劲度模量的虚拟试验。通过试验检验与校准，得出具有高可靠性、高精确度的劲度模量力学预估方法。     

强度不等的非对称叠加态的等幂次和压缩

文章构造了由多模虚共轭相干态│iZj(a) 〉q与多模虚共轭相干态的相反态│-iZj(b) 〉q线性叠加所组成的一种强度不等的非对称两态叠加多模叠加态光场│Ψ(ab)〉q。利用多模压缩态理论,研究了态│Ψ(ab)〉q的等幂次N次方H压缩特性。结果表明:(1)在Zj(a)≠Zj(b)的情况下,无论腔模总数q与压缩幂次N这两者之积q·N取奇还是取偶,态│Ψ(ab)〉q在一定条件下总可呈现出周期性变化的等幂次N次方H压缩效应。(2)在Zj(a)=Zj(b)且q·N取奇数的条件下,态│Ψ(ab)〉q将呈现出等幂次N次方H压缩简并现象。     

Identification of organ-specific glycosylation of a membrane protein in two tissues using lectins

Since glycosylation of proteins is performed by the host cell, and variable sugar groupings can confer heterogeneity on the same polypeptide, we wished to see whether membrane proteins, in particular the ubiquitous transmembrane Na, K-ATPase, could be glycosylated differently in different organs. Using a highly sensitive enzyme-linked antibody detection system of bound digoxigenin-labelled lectins on nitrocellulose sheets containing electroblotted and subunits of kidney and brain Na,K-ATPase, isolated from various rat strains, in combination with isoform-specific immunoblots, we discovered that brain Na,K-ATPase was highly mannosylated in contrast to renal Na,K-ATPase. Thus, we describe the existence of organ-related glycoforms of an integral ubiquitous membrane protein, i.e. diversification of the same polypeptide by organ-typical sugars. At the same time, the presence of the same glycosylation pattern can make distinct protein isoforms occurring in a same organ more homogeneous. Such organ-related glycoforms may serve for tissue identification and as tissue-specific receptors.     

群中心扩张与二维上同调群通用系数定理

本文在Ｇｒｕｅｎｂｅｒｇ中给出了范畴之中心自由对象构作基础上进行群Ｇ中心扩张构作，使用覆盖及衍生同态ψＥθ为中心自由扩张，文中称作普适覆盖扩张，Ｅ是Ａｂｅｌ群Ａ经群Ｇ的中心扩张。定理１指出ｆ是一个二因子次直接和，尽管非交换，因子之一为Ｖ经Ｈ１（Ｇ）的交换扩张，另一是Ｇ的本盖扩张，二是者上交于因子群Ｈ１（Ｇ）。     

基于刚体离散元模型的矿岩散体流动规律

针对崩落采矿法矿石损失与贫化大的问题,利用刚体离散元原理和方法,成功研究了多种放矿制度下覆盖岩层与矿石的相互作用和界面动态变化过程.研究表明:在1 213 m左出矿口放矿时,其右上方约9 m位置矿石被废石包裹,即使再采用相邻或相间出矿口放矿,被包裹矿石也难以放出,矿石贫化损失最大:采用中出矿口放矿时,矿岩界面增大,呈漏斗状,贫化次之;采用左中右三个出矿口均衡放矿时,矿岩界面最短且近似平行下降,矿石贫化与损失最少.模拟结果对于预测不同放矿制度下,矿石的贫化与损失指标提供了可靠依据.     

岩质高陡边坡失稳的离散元法与非连续变形法的对比分析

通过对大冶露天矿高陡边坡的离散元法与非连续变形法的对比分析，探讨了这两种数值分析方法的异同点，研究了边坡失稳的机理．所得结果可为高陡边坡的失稳防治提供科学依据．