共查询到20条相似文献,搜索用时 62 毫秒
1.
《浙江海洋学院学报(自然科学版)》2001,20(2):127-129
文[1]中,F.H.Clarke在非负完备测度空间(T,∑,μ)中,给出了LP(T,∑,μ)(1≤P<∞)中积分泛函广义梯度满足,的条件,本文将文[1]中的条件(A),(B)改为(A※),(B※),从而将LP空间中积分泛函的广义梯度推广到lP空间中级数泛函的广义梯度。 相似文献
2.
讨论了存在Loewner偏序的两矩阵的k级复合矩阵的关系,并将复合矩阵与广义Schur补结合起来,研究矩阵广义Schur补的复合矩阵与复合矩阵广义Schur补之间的Loewner偏序,得到了Ck[(A^*BA)/α]≤[Ck(A/α)]^*Ck[B(β′)]Ck(A/α)等结果,并给出相关的特征值与奇异值不等式,推广和改进了近期的相关结果. 相似文献
3.
周士藩 《宁夏大学学报(自然科学版)》1985,(1)
本文是在[3]、[4]文的基础上,讨论矩阵A与B的直积的广义逆类,并把它与矩阵A、B的广义逆类作些比较。在[1]文中,把满足数字矩阵方程:(1)AXA=A;(2)XAX=X;(3) 相似文献
4.
任潜能 《湖北民族学院学报(自然科学版)》2002,20(1):29-32
设H为实可分的Hilbert空间,N为H上的完备Nest,algN为B(H)上的Nest代数,若ψ是algN到B(N)上的线性映射且对任意T∈B(H),有ψ(T)(kerT^*)包含于ranT,则称ψ为Nest代数algN上的右*-核值保持映射,证明了若对于任意N∈N,dimN≠1,,是algN上关于弱算子拓扑连续的右*-核值保持映射ψ为广义右*-内导子,即存在A,B∈B(H),对任意的T∈algN,有ψ(T)=TA+BT^*。 相似文献
5.
汪泽群 《甘肃联合大学学报(自然科学版)》1989,(1)
在过去十多年中,非光滑分析已有了很大的发展。对满足不同条件的泛函,用不同的工具,已获得多种类型的中值定理。如文[1]等。在局部凸空间,文[1]用上凸逼近已得到几个中值定理。本文仍以上凸逼近为:工具,用不同文[1]的方法,得到类似于文[1]的结果,或者说,本文为文[1]等的一个注记。一、上凸逼近假设 X 为实局部凸(豪斯道夫)拓扑向量空间,∫:X→R 是广义实值函数。 相似文献
6.
严绍宗 《复旦学报(自然科学版)》1984,(3)
在本短文中,将给出某些算子成为正常算子的条件.特别,将文[1]中如下命题“设T是复Hilbert空间中θ-类算子,如果T~2是正常算子,那末T必是正常算子”推广成θ-类算子T,如果p(T)是正常算子(其中p(·)是非常数多项式),那末T必是正常算子(详见本文定理4). 本文,H表示复Hilbert空间,B(H)表示H上线性有界算子全体,σ(A),p(A)分别表示算子A的谱集和正则集,(?)(A),(?)(A)分别表示算子A的零空间、值空间.m(·)表示Lebesqne测度. 相似文献
7.
谢彦麟 《华南师范大学学报(自然科学版)》1990,(2):1-56
本文首次使用Razumikhin-温立志型V泛函[3]把文[4](推广[3]对RFDE)中的定理修改为判定方程(1)零解C~1-稳定性,改进了文[1],[2]的结果. 相似文献
8.
包玉娥 《内蒙古民族大学学报(自然科学版)》2001,16(3):225-229
在文[1]的基础上,讨论了LF赋准范空间上LF线性算子的连续问题,证明了LF线性算子连续的充要条件;得到了LF赋准范空间上存在非零连续LF线性泛函的一个充要条件,揭示了连续LF线性算子(泛函)与通常的线性算子(泛函)的内在联系。从而,为建立LF赋准范空间的对偶理论打下了良好的基础。 相似文献
9.
本文是文[1]的继续,讨论了C—型概率内积空间中的线性泛函与线性算子理论。得到了C—型概率内积空间中线性泛函的Riesz表示定理和自共轭算子的若干结论。 相似文献
10.
文[1]中定义了新的K泛函,并研究了当α≥1时它与光滑模的关系,该文将继续研究0≤α<1时,文[1]中的定理依旧成立. 相似文献
11.
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. 相似文献
12.
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. 相似文献
13.
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。 相似文献
14.
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. 相似文献
15.
Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
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- 相似文献
16.
Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
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- 相似文献
17.
Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献
18.
《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献
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《吉林大学学报(理学版)》2014,(5):1105
<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has 相似文献