四元数次自共轭矩阵方程

讨论了四元数方程XAY=A(A为非退化四元数矩阵)、四元数次自共轭方程*XAX=A、XAX=A(A为非退化四元数次自共轭矩阵)的求解问题,其中*X为四元数矩阵X的次共轭转置矩阵.     

Zh~s—纯正合列

§1 引言在文献[1]中,周伯熏教授给出了左环模张量积的定义。设 K 是有单位元的可换环,R 和S 是有单位元的 K 环,若 A 是左 R—模,记作 A∈(?),B 是左 S—模,则 A(?)B∈(?)。本文用 A(?)B 表示左模张量积,A(?)B 表示通常意义下的张量积。就是说 A(?)B∈(?),而 A(?)     

四元数体上行列式的定义和Cramer解式

四元数体Q上的矩阵理论目前尚处于发展的初期,若干基本问题有待解决。本文给出了Q上的行列式新定义如下: 设A=(α(?),)(?)×(?),α(?),∈Q, (?) 基中S_(?)是n阶对称群,σ的循环分解是     

自由么半群的反自同构和S-,P-正则语言间的对偶性

一、基本概念和记法令∑是一个非空有限集,∑~(?)记写由∑生成的自由么半群,∑~(?)的元素叫称为字,∑~(?)的单位元称为空字,记作1,且记∑~+=∑~(?)\{1},∑~(?)的任一子集L称为∑上一个语言,我们用φ来记写空集组成的空语亩,用|L|记写语言L的基数。若A,B(?)∑~(?)为∑)上两个语言,     

《实质蕴涵》的一种立论

一、问题的提出(一) 在命题演算中讨论的联结词有下列五种: 1、非,由它可以从A作出“非A”,“非A”叫做A的否定式,记为(?)。     

多值非紧算子的正固有值

设X 是一Banach 空间。一个闭集K(?)X,如果满足条件:ax βy(?)K (?)x,y(?)K (?)α,β≥0就称之楔形(Wedge)。如果楔形K 又满足条件,K∩(—K)={0}就称之为锥,这里0表空间X 的零元。对任何Ω(?)X,它的非紧致度是     

关于重行列式的注记

本文指出，四元数矩阵A的重行列式可用一个相应的复行列式来表示，并且A的非异性也可用复行列式来刻划。     

关于随机变量的独立性

设X_1、X_2是定义在概率空间(Ω,F,P)上的、可测度量空间(s,S)中的两个随机元。对于A∈S,A的边界(?)A,若P(X∈(?)A)=0,称A为X的连续集。易知X的一切连续集构成一个σ代数。定义对于随机元(X_1,X_2),(?)X_1的连续集A_1与(?)X_2的连续集A_2,若P(X_1∈A_1,X_2∈A_2)=P(X_1∈A_1),P(X_2∈A_2),称(X_1,X_2)对于连续集独立。对于连续集独立的随机元,不一定概率独立,例     

关于具锥的Banach空间中一类凸算子的正解和谱理论

设E是具锥KE的Banach空间.借助于锥K可以在空间E中引进半序关系,即,如y-x∈K,记为x≤y;如果y-x(?)K,则x(?)y.设A是作用在E上的非线性算子,如果AK(?)K,则称A为关于锥K是正的.关于锥K为正的算子,以下简称为正算子.正算子A称为凸的,如果存在这样的非零元u_0∈K,使得对任意的x∈K,x≠0均有     

非线性规划方法简介(Ⅲ)

五、带线性约束的最优化问题这一章我们讨论如下的非线性规划问题 minf(x) Ax=b, (5.1) Dx≥d,其中A和D分别是m_1×n和m_2×n矩阵,且A是行满秩的矩阵。符号A_1和D_1分别表示矩阵A的第t行和矩阵D的第i行。如果(?)是问题(5.1)的一个可行解,定义标号集(?),我们称(?)中的标号对应的约束条件为点(?)的“起作用约束”(或主动约束),同时每一等式约束条件A_ix=b_i也是点(?)的起作用约束。起作用约束这一概     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-