一次同系数不定方程的解数问题探究

文章将一次不定方程转化为指数方程，利用二项式定理及幂级数的相关知识，得出了一次同系数不定方程的正整数解、非负整数解的解数．     

菲波那契数列与一个不定方程的正整数解

讨论了一个二元二次不定方程的正整数解与菲波那契数列的关系,利用递增构造、递减构造解的方式证明了由“魔八方”建立的一个二元二次不定方程的正整数解为菲波那契数列形式,最后得出,该方程只有菲波那契数列形式的正整数解的结论。     

用MLP方法求一类强非线性系统的次谐和超谐共振解

借助于文[4]所提出的变换参数以α=εω1/(n/m ωο)^2 εω1，采用改进的LP方法，研究了一类具有五次非线性系统的1/3次和1/5次亚谐共振解以及3次和5次超谐共振解．     

多目标规划弱较多有效解的对偶性

在多目标规划的弱较多有效解的基础上，引进了它的次弱较多有效解概念，借助弱较多有效解的表示定理，讨论了弱较多有效解和次弱较多有效解之间的对偶关系，建立了相应的对偶定理。     

矩阵方程AXB=C的（反）次Hermite解

给出了矩阵方程ＡＸＢ－Ｃ有（反）次Ｈｅｒｍｉｔｅ解的充要条件及其通解表达式。     

关于凸二次规划的解唯一性

考虑凸二次规划问题 ,给出它存在唯一解的几个充分和必要条件     

五元一次不定方程的一个求解公式

讨论了五元一次不定方程的求解方法.得出五元一次不定方程ax+by+cz+ev+fw=N的一个求解公式.     

一类摄动代数方程的渐近解

设f(x)与fi(x)分别为复数域上的m和mi次多项式(1≤i≤n)。M为mi中的最大数。利用直接展开法，讨论了一类摄动代数方程的渐近解，给出了一种逐步求所有解的方法。     

KP方程的精确行波解

借助一个新的代数方法,其算法为研究一个一阶并具有六次非线性项的微分方程,研究了KP方程,得到新的孤波解和周期解,这种方法也适合研究其他的非线性演化方程.     

“次二次”Hamilton系统周期解

研究“次二次”非自治Ｈａｍｉｌｔｏｎ系统的周期解问题,所用方法是分成两个分量来考虑,利用极小极大原理,建立一个临界点定理;并提出了一种新的“次二次”条件,这推广了已有的关于次二次的Ｈａｍｉｌｔｏｎ系统周期的结果。     

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