欧拉方程的算子算法

在算子Ｂ＝ｘ．ｄ／ｄｘ作用下,欧拉方程ｘｎｄｎｙ／ｄｘｎ＋Ｐ１ｘ＾ｎ－１ｄｎ－１／ｄｘ＾ｎ－１＋．．．＋Ｐｎ－１ｘｄｙ／ｄｘ＋Ｐｎｙ＝ｆ（ｘ）,其中Ｐ１,Ｐ２,．．．,Ｐｎ为常数）,可化为：（Ａ＾ｎＢ＋Ｐ１Ａ＾ｎ－１Ｂ＋．．．＋Ａ＾０Ｂ）ｙ＝ｆ（ｘ）。并简记为Ｌ（Ｂ）ｙ＝ｆ（ｘ）,把Ｂ待定系数ｋ,则Ｌ（Ｂ）＝０即为欧拉方程的特征方程,从而可求出齐次方程的通解ｙＨ,再根据Ｌ（Ｂ）的逆算子性质求欧拉方程的特解ｙｐ＝１／Ｌ（Ｂ）ｆ（ｘ）,便求得欧拉方程的通解：ｙ＝ｙＨ＋ｙｐ。     

一类无限平面近环的结构

在复数域Ｃ中重新引入新的乘法运算＊φ，将Ｃ加工成一个平面近环（Ｃ，＋，＊φ），证明了：（１）Ａ＝｛ａ∈Ｃ｜ａ＊φｚ＝０＊φｚ｝＝ｋｅｒφ；（２）对于ａ∈Ｃ＊＝Ｃ＼Ａ，令Ｂａ＝｛ｂ∈Ｃ＊｜ｂ＊φ１ａ＝ｂ｝，则Ｃ＝Ａ∪｛Ｂａ｜ａ∈Ｃ＼Ａ｝是Ｃ的一个分划；（３）（Ｂａ，＊φ）是一个群；（４）（Ｃ，Φ）是Ｆｅｒｒｅｒｏ对，其中Φ＝｛φｂ｜ｂ∈Ｂａ｝，φｂ（ｘ）＝｜φ（ｂ）｜１／αｘ，ｘ∈Ｃ     

强子物理中核磁子与同位旋—自旋耦合

费米强子磁矩与磁子都是在强子发射源中产生的，玻尔源半径ａＢ取重整化群紫外固定点（β（ｅ※Ｒ，ｇ※Ｒ）＝０）的值，ａＢ＝ｈ／２αｓＭｐＣ，且μｈ／μＮ＝ａＢｃ＋２αＩ·Ｊ＋δ（ｇ※Ｒ，ｅ※Ｒ），强电相互作用关系（ｇ※Ｒ＋ｂｅ※Ｒ）２成立（（α※ｓ＝０．４０７，ＱＣＤ；α※ｅ＝１／１３７，ＱＥＤ）．     

关于有理系数微分方程的复振荡理论

证明了：如果Ｂｋ－ｊ（ｊ＝１,…,ｋ）为有理函数,在。点有ｎｋ－ｊ（＞０）阶极点,存在某个Ｂｋ－ｓ（１≤ ｓ ≤ ｋ）满足：当ｊ≠ ｓ时,有ｎｋ－ｊ／ｊ＜ｎｋ－ｓ／ｓ．假设Ｆ（ｚ）０为亚纯函数,且λ（１／Ｆ）＜σ（Ｆ）＝β＝（ｎｋ－ｓ＋ｓ）／ｓ．如果微分方程ｆ（ｋ）＋ Ｂｋ－１ｆ（ｋ－１）＋…＋ Ｂ０ｆ＝ Ｆ的所有解为亚纯函数,则每个解／满足σ（ｆ）＝（ｎｋ－ｓ＋ｓ）／ｓ．     

植物生长调节剂和蔗糖对抗黑胫病香果树丛芽分化的影响

将抗黑胫病香果树愈伤组织在ＢＡ、ＮＡＡ、蔗糖３因素条件下作Ｌ＿９（３￣４）正交组织培养试验．结果表明，ＢＡ、ＢＡ与ＮＡＡ的交互作用对抗病香果树愈伤组织丛芽分化有极显著影响．ＢＡ／ＮＮＡ（Ｘ）与芽分化（Ｙ）的关系为Ｙ＝１．３６５１Ｘ￣（０．１２８６），ＢＡ／ＮＡＡ（Ｘ）和ＢＡ＋ＮＡＡ（Ｙ）与芽分化（Ｚ）的关系为Ｚ＝１．１０３３＋０．０９９９（Ｘ＋Ｙ）－０．００２７（Ｘ＋Ｙ）￣２，ＢＡ／ＮＡＡ（Ｘ）和蔗糖浓度（Ｙ）与芽分化（Ｚ）的关系为Ｚ＝１．０７４０＋０．０７９３（Ｘ＋Ｙ）－０．００１７（Ｘ＋Ｙ）￣２．在本该试验范围内，丛芽分化的最适培养基为ＭＳ＋ＢＡ２ｍｇ／Ｌ＋ＮＡＡ０．１ｍｇ／Ｌ＋蔗糖３％．     

两分子饱和反应系统的极限环的存在性与唯一性

陈兰荪等在第二届中国生物数学学术会议上提出了生物动力学系统中研究的１１个问题。作者所研究的是第１１个问题，生物化学中两分子饱和反应。其数学模型为ｘ＝Ｊ＿１（１＋ｘ＋ｙ＋Ａｘ￣２）－ｘ（１＋ｘ＋ｙ＋Ａｘ￣２）－Ｂｘｙ；ｙ＝Ｊ＿２（１＋ｘ＋ｙ＋Ａｘ￣２）－Ｂｘｙ．其中：Ｊ＿１、Ｊ＿２、Ａ、Ｂ为非负常数，当Ｊ＿１－３Ｊ＿２＜－［１＋Ｂｘ＋（Ｂ＋１）ｙ］／（１＋Ａｘ）时，该模型在第一象限内至少存在一个极限环；当Ｊ＿１＜Ｊ．ｘ＜ｙ，Ｂ＞ｌ且ｘ＞ａ时，该模型在第一象限内存在唯一的极限环。其中ａ＜０为方程ｐ（ｘ＝）＝０的最大负实根．     

分数阶积分方程

对分数阶微分方程的初值问题所对应的分数阶积分方程ｚ（ｔ）＝∑ｌｋ＝０Ｃｋｋｌｔｋ＋（－λ）Γ（α）∫ｔ０（ｔ－ｓ）α－１ｚ（ｓ）ｄｓα≥１ｚ（ｔ）＝∑２ｌ－１ｋ＝０ＣｋГ（１＋ｋα２ｌ）ｔｋα／２ｌ＋（－λ）Г（α）∫ｔ０（ｔ－ｓ）α－１ｚ（ｓ）ｄｓｌ＝０，１，２，…α≥１利用Ｍｅｌｉｎ变换和Ｆｏｘ函数求出的解为ｚ（ｔ）＝∑ｌｋ＝０∑∞ｎ＝０Ｃｋ（－λ）ｎГ（１＋ｋ＋ｎα）ｔｋ＋ｎα和ｚ（ｔ）＝∑２ｌ－１ｋ＝０Ｃｋ∑∞ｎ＝０（－λ）ｎГ（１＋ｎα＋ｋα２ｌ）ｔｎα＋ｋα２ｌ     

方格偶图Bm×n中的圈数

设Ｂ_(ｍ×ｎ)是具有ｍ×ｎ个顶点的方格偶图,ｇ（ｍ,ｎ）表示图Ｂ_(ｍ×ｎ)中不同圈的数目．证明了 ｇ（２, ｎ）＝ ｎ（ ｎ＋ １）／２, ｇ（３, ｎ）／２＝［（１＋√２）（ｎ＋２）＋（１－√２）（ｎ＋２）］／４－ ２（ ｎ－ １）－ ７／２,其中 ｎ＝２,３,４,…     

积分不等式(Ⅰ)

本文最初欲把Ｂｅｌｍａｎ不等式推广成：已知φ（ｘ）≤Ｃ（ｘ）＋Ｋ１（ｘ）∫ｘａＨ１（ζ）φ（ζ）ｄζ＋Ｋ２（ｘ）∫ｘａＨ２（ζ）φ（ζ）ｄζ（其中：Ｋｉ（ｘ）≥０,Ｈｉ（ｘ）≥０,ｉ＝１,２）,求适合上述不等式的φ（ｘ）的最优上界Ψ（ｘ）（ｘ≥ａ）。但后来证明这个最优上界Ψ（ｘ）是不能用初等方法求出的,只知道Ψ（ｘ）是存在的且适合积分方程：Ψ（ｘ）＝Ｃ（ｘ）＋Ｋ１（ｘ）∫ｘａＨ１（ζ）Ψ（ζ）ｄζ＋Ｋ２（ｘ）∫ｘａＨ２（ζ）Ψ（ζ）ｄζ。把此结论加以全面的推广即得到本文在高维向量空间中的多变量线性积分不等式     

一类亚纯函数系数线性微分方程亚纯解的增长性

假设Ａｊ（ｚ）＝Ｂｊ（ｚ）ｅＰｊ（ｚ）（ｊ＝０,１,,ｋ－１）,Ａｊ不全恒等于零,其中Ｂｊ（ｚ）是亚纯函数,Ｐｊ（ｚ）＝ａｊ,ｍｊｚｍｊ＋＋ａｊ,０为非常数多项式,ａｊ,ｑ（ｑ＝０,１,,ｍｊ）为复常数,ａｊ,ｍｊ０,并且满足（Ｂｊ）＜ｄｅｇＰｊ以及当ｉｊ时,ｄｅｇ（Ｐｉ－Ｐｊ）＝ｍａｘ｛ｍｉ,ｍｊ｝（Ａ０）．且满足当ｍｊ＝（Ａ０）且ａｒｇａｊ,ｍｊ＝ａｒｇａ０,ｍ０时,｜ａｊ,ｍｊ｜＜｜ａ０,ｍ０｜．那么齐次线性微分方程ｆ（ｋ）＋Ａｋ－１ｆ（ｋ－１）＋＋Ａ０ｆ＝０的任一非零亚纯解ｆ都满足（ｆ）＝．特别地,如果ｆ（ｚ）的极点重数一致有界,那么２（ｆ） ＝（Ａ０）．     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

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