带有电荷与磁荷的球对称动态黑洞的非热效应

利用弯曲时空中标量粒子运动的 Hamilton Jacobin方程,研究带有电荷和磁荷的球对称动态黑洞周围时空中标量粒子的能量分布.得到了发生自发辐射的能量条件,它不仅依赖于黑洞的质量、电荷和磁荷,还与黑洞视界的变化有关,与视界附近的四维电磁势有关.     

带有电荷、磁荷的直线加速黑洞时空背景下标量粒子的能级

利用弯曲时空中标量粒子运动的Hamilton-Jacobin方程，研究带有电荷和磁荷的直线加速动态黑洞周围de-sitter背景时空中标量粒子的能量分布．它不仅依赖于黑洞的质量、电荷、磁荷和加速度，还与黑洞视界的变化有关，与视界附近的四维电磁势有关．     

变加速直线运动带电黑洞的非热效应

利用弯曲时空中标量粒子运动的Hamilton-Jacobin方程,研究了变加速直线运动带电黑洞周围时空中的自发辐射.得到了自发辐射的能量条件,它不仅依赖于黑洞的质量、电荷和加速度,还与黑洞视界的变化有关,与黑洞视界附近的四维电磁势有关.     

磁单极黑洞的辐射

本文考查了含有磁单极或双子的 Kerr-Newman 黑洞视界附近的量子效应,指出这种黑洞与通常的黑洞一样,可以产生热辐射和非热辐射。一、Hawking 热辐射最近,Kasuya 给出了带有电荷和磁荷的转动黑洞(Kerr-Newman-Kasuya 黑洞)的度规场     

Vaidya-Bonner-de Sitter时空中标量粒子的热辐射

在Vaidya-Bonner-de Sitter时空中,研究了黑洞的标量粒子的量子热辐射.采用共形平直方法,确定了黑洞内外视界和宇宙视界的准确位置,得到了黑洞外视界和宇宙视界的温度.通过解弯曲时空中的Klein-Gordon方程,获得标量粒子的热辐射谱,粒子在视界上的电势能起化学势的作用.当该黑洞电荷为零时,以上结果就是VaidyaSchwarzschild-de Sitter的情况.     

变加速直线运动荷电黑洞时空中的粒子能级与非热辐射

文章为了精确地求出一个直线加速运动荷电黑洞时空中的粒子能级 ,并在此基础之上 ,对此黑洞视界附近的粒子能级的分布特征进行研究 ,从而搞清楚此黑洞的非热辐射特征。作者采用在直线加速运动荷电黑洞时空中求解Hamilton -Jacobi方程 ,并采用广义的乌龟坐标变换将Havnilton -Jacobi方程变成乌龟坐标下的形式 ,以便求出粒子广义动量的径向分量 ,进一步求出粒子能量 ,有了粒子的能量表达式便可以研究此黑洞视界附近的能级及此黑洞的非热辐射。结果表明 ,粒子能级分布与黑洞荷电产生的电磁四维势有关 ,还与黑洞的蒸发率等因素有关 ,黑洞非热辐射粒子的能量范围与四维电磁势的A0 和A1分量有关 ,还与黑洞的蒸发率 ( rH)有关。因此 ,此黑洞有非热辐射 ,辐射粒子的能量范围与A0 、A1和 rH 有关     

缓变动态Vaidya-Bonner黑洞的热辐射

利用Vaidya-Bonner黑洞视界附近熵的体密度和Reissner-Nordstr(o)m黑洞的辐射能通量,求得缓变动态Vaidya-Bonner黑洞视界附近的瞬时辐射能通量和瞬时辐射功率,发现缓变动态Vaidya-Bonner黑洞的热辐射满足广义StefanBoltzmann定律.利用热质点模型得到了距黑洞遥远的观测者接收到的辐射能通量与黑洞与观测者之间距离的平方成反比.当截断距离和薄膜厚度取定后,缓变动态Vaidya-Bonner黑洞视界附近标量场的瞬时辐射能通量和辐射功率不仅与黑洞的质量和电量有关,还与黑洞的视界变化率及薄层膜内辐射粒子的平均泄流速率有关,表明黑洞周围的引力场、电磁场以及视界的变化和辐射粒子种类均对黑洞的热辐射产生影响.     

Vaidya-Bonner-de Sitter时空背景下黑洞周围标量粒子的能量分布

利用弯曲时空中标量粒子运动的Hamilton—Jacobin方程，研究Vaidya—Bonnet—de Sitter时空背景下黑洞视界附近标量粒子的能量分布，结果表明粒子的能量不仅与粒子的质量有关，还与黑洞的时空结构及黑洞视界的变化有关。     

带有电荷、磁荷的一类任意加速黑洞的量子非热辐射

利用弯曲时空中标量粒子运动的Hamilton-Jacobi方程,研究带有电荷、磁荷的任意加速黑洞的非热辐射.采用滞后Eddington-Firkelstein坐标表示此黑洞的动态特征,计算出Dirac能级的精确表示式和交错能级的最大值,所得结果与采用超前Eddington-Firkelstein坐标表示此黑洞是一致的.     

Vaidya—Bonner—de Sitter时空中标量粒子的热辐射

在Vaidya-Bonner-de Sitter时空中，研究了黑洞的标量粒子的量子热辐射。采用共形平直方法，确定了黑洞内外视界和宇宙视界的准确位置，得到了黑洞外视界和宇宙视界的温度。通过解弯曲时空中的Klein-Gordon方程，获得标量粒子的热辐射谱，粒子在视界上的电势能起化学势的作用，当该黑洞电荷为零时，以上结果就是Vaidya-Bonner-de Sitter的情况。     

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