激光探针等离子质谱法分析岩石样品时相对元素响应及基体效应

研究了ＬＡＭ－ＩＣＰ－ＭＳ法分析岩石样品时以＾４３Ｃａ和＾５５Ｍｎ为内标的相对元素响应因子特征并进行了对比。以＾４３Ｃａ为内标不能消除ＬＡＭ－ＩＣＰ－ＭＳ分析中的基体效应,而以＾５５Ｍｎ为内标可明显地减弱基体效应的影响。测定了６个日本火成岩岩石标样中的３２个微量元素,除个别样品（如ＪＧ－３）和少数轻质量元素Ｐ、Ｓｃ、Ｃｒ以及重稀土元素Ｄｙ、Ｅｒ、Ｙｂ等外,绝大多数微量元素的分析值与标准植的相对偏差     

数据库规范化理论研究

数据库规范化理论是数据库领域研究的一个重要课题.本文综合论述了数据库规范化理论研究的现状,指出了从关系数据库、面向对象数据库到XML数据库等各发展阶段中数据库规范化问题的特点、主要思想和关键方法,描述了数据库规范化理论的重要研究成果以及存在的问题,指出将形式概念分析方法引入数据库规范化中,作为新环境下数据库规范化理论研究的新的发展方向.     

双链特异性核酸酶的生物学和医学应用

双链特异性核酸酶DSN是一种能高选择性地识别并酶切完全匹配的DNA双链或者DNA-RNA杂交双链中的DNA,而对单链DNA和RNA几乎没有作用的核酸酶.DSN酶的上述特点使其在生物和医学等领域广泛应用,主要包括全长cDNA文库的均一化、单核苷酸多态性(SNP)检测和高通量测序等.近年来,DSN酶在microRNAs(miRNAs)的检测领域得以长足发展和应用.miRNAs是一组内源性、非编码短序列RNAs,在生理和病理过程中具有重要作用,但由于其序列短、丰度低等特点, miRNAs的检测一直是临床难题.新近研究主要基于DSN酶信号放大的特点,相继建立了一系列生物传感技术,通过采用不同检测原理如比色法、荧光法、电化学法等实现痕量miRNAs检测.本文就DSN酶在miRNAs检测、SNP检测、全长cDNA文库均一化及高通量测序等方面的生物学应用进行了综述.     

The Geometry of Lightlike Hypersurfaces of the de Sitter Space

It is proved that the geometry of lightlike hypersurfaces of the de Sitter space Sn+11 is directly connected with the geometry of hypersurfaces of the conformal space Cn. This connection is applied for a construction of an invariant normalization and an invariant affine connection of lightlike hypersurfaces as well as for studying singularities of lightlike hypersurfaces.     

抗多径噪声归一化合并SFH／MFSK系统在短波信道中的性能

分析了具有抗多径措施的噪声归一化合并ＳＦＨ／ＭＦＳＫ接收机在存在部分边带干扰的多径瑞利衰落信道中的性能，着重研究了多径加权因子ω对该系统性能的影响．结果表明，最佳加权困子ω与多径干扰强度、分集重数、调制阶数和信道热噪声有关．对多径合适地加权可明显地降低比特误码率Ｐｂ，在分集和编码相结合时，能使Ｐｂ下降２～３个数量级．     

模糊拓扑环的模糊复范化

引入环上的模糊复范数概念 ,得到模糊拓扑环可模糊复范化的充分必要条件 ,从而揭示出模糊拓扑环与普通拓扑环所不同的一个新特点 .     

On the Extreme-Value Theory for Stationary Diffusions Under Power Normalization

We consider regular positive recurrent diffusion processes on an open interval (l,r) R ¹ with inaccessible end points. Necessary and sufficient conditions are given in terms of the scale functions describing the domains of attraction of the nondegenerate limiting probability laws for the extreme-values under power normalization. Sufficient von Mises-type conditions and formulas for norming constants are also obtained.     

Allowed Parameter Regions for a Tree—Level Inflation Model

The early universe inflation is well known as a promising theory to explain the origin of large-scale structure of universe and to solve the early universe pressing problems.For a reasonable inflation model,the potential during inflation must be very flat,at least,in the direction of the inflaton.TO construct the inflaton potential all the known related astrophysics observations should be included.For a general tree-level hydrid inflation potential,which is not discussed fully so far,the parameters in it are shown how to be constrained via the astrophysics data observed and to be obtained to the expected accuracy,and to be consistent with cosmology requirements.     

Simulation of tumor microvasculature and microenvironment response to anti-angiogenic treatment by angiostatin and endostatin

The effects of anti-angiogenesis treatment by angiostatin and endostatin on normalization of tumor microvasculature and microenvironment are investigated, based on mathematical modeling and numerical simulation of tumor anti-angiogenesis and tumor haemodynamics. The results show that after anti-angiogenesis treatment: (i) the proliferation, growth, and branching of neo-vessels are effectively inhibited, and the extent of vascularization in tumors is accordingly reduced. (ii) the overall blood perfusion inside of tumor is declined, the plateau of tumor interstitial fluid pressure (IFP) is relieved, the interstitial fluid oozing out from the tumor periphery into the surrounding normal tissue is reduced, the reduction of overall extravasation across vasculature to tumor interstium is much less than the decreased overall blood perfusion, due to the decline of IFP, the intravasations is remarkablely effected by the change, in some cases there are no intravasation flow appear.     

基于最大长度区间的区间权重向量标准化方法

区间权重向量在不确定多准则决策分析和AHP中都发挥重要作用,鉴于区间权重向量的不确定性,区间权重向量的标准化问题成为研究的一个热点.在相关研究的基础上,提出基于最大长度区间的区间权重向量标准化方法.首先为了更好理解标准化权重向量,给出标准化区间权重向量的一个等价命题;其次,提出简便的标准化区间权重向量的判定方法,并提出不同情形下,通过调整最大长度区间的区间权重向量的标准化方法;最后,通过算例及与其他方法的对比,说明该方法是简便有效的.