非线性介观电路的量子化

为了介观电路量子理论的建立,在电荷不连续的前提下,得到了含有二极管的非线性介观电路的有限差分薛定谔方程.在广义动量表象中系统的薛定谔方程转化为四阶微分方程,利用微扰法,得到了系统的能谱和波函数,并计算了电流的量子涨落.     

双孔耗散介观电容-电阻-电感耦合电路的量子涨落

从介观电路中经典运动方程出发,运用正则变换的方法研究双孔耗散介观电容电阻电感耦合电路的量子涨落的问题.结果表明电荷和电流的量子效应不仅与其组成的元件有关,还与其耦合的回路有关.     

介观耗散电容耦合电路的库仑阻塞效应

该文基于介观电路中电荷应是量子化的这一事实，应用正则量子化方法给出了介观耗散电容耦合电路的量子化方法和库仑阻塞条件，研究结果表明：介观耗散电容耦合电路的库仑阻塞条件不仅与电路中的电容和电感有关，而且与耗散电阻有关；随着耗散电阻的增大，库仑阻塞现象更加明显．该文还讨论了介观电容耦合电路的量子涨落。     

介观耗散RLC并联电路的量子效应

通过对介观耗散RLC并联电路做类似阻尼谐振子处理,将其量子化.在此基础上,应用量子双波函数理论研究了电感(L)、电容(C)、电阻(R)和初位相(ωt0),且它们均具有确定值的单一介观耗散RLC并联电路中各支路电流和电压的量子涨落.结果表明:量子双波函数理论能准确描述单一耗散介观RLC电路的量子涨落.     

双耗散介观LC并联电路的量子化及量子效应

针对LG电路的实际情况提出了双耗散介观LC并联电路模型,并利用经典电路的基尔霍夫定律和阻尼谐振子的量子化方法对电路进行量子化.在电路模型量子化的基础上进一步讨论了双耗散LC介观并联电路在真空态下电感支路和电容支路中电流和电压的量子涨落,并分析耗散电阻RC和RL对两个支路中的量子涨落的影响.结果表明,两个支路的电流和电压...     

有源介观电感耦合电路的本征态及热效应

研究了介观电感耦合电路中压缩态的产生及涨落压缩问题，如果电路参数电容和电感随时间变化，则有源电感耦合电路的本征态是压缩平移Fock态，当电路的频率不变时，电感增加，电荷的量子涨落有压缩，而电流的量子涨落无压缩，电感减小，电流的量子涨落有压缩，电荷的量子涨落无压缩，耦合电感有助于减小电流的量子涨落，温度上升使量子涨落增加，利用电容和电感的时间演化能够降低温度引起的热噪声。     

激发相干态下电感电容耦合介观电路的量子效应

通过量子化无耦电感电容耦合介观电路,研究了激发相干态下介观电路的量子效应,结果表明,每一回路中电荷、电流的平均值和方均值皆不为零,为回路存在相互关联的量子噪音,且它们决定于相干态、粒子数态参数以及电路参量。     

含时介观LC电路的双波描述

将量子的双波理论应用于具有随时间变化的电容和电感的含时介观LC电路，给出了单一含时LC电路中电荷和磁通量（电流）的平均值和量子涨落，电荷和磁通量的平均值满足电路经典的运动方程。在对电路的初始相位进行统计平均后，各量的平均值以及量子涨落回到标准量子力学的结果。这些结果表明，双波理论能够描述单一的含时介观电路。     

电荷离散化下介观传输线的研究

研究由多个单元电感电容回路周期性连接而成的介观传输线路.基于电荷的量子化,导出了传输体系的哈密顿量和电流.根据电荷算符满足的非线性运动方程,在各单元能量基上,精确地计算了能谱.此外,还考虑了含电阻的耗散系统.结果表明,在电荷离散的条件下,介观回路方程的形式与经典方程有显著差别;介观电路的能谱除与电路参数相关外,还明显依赖于电荷量子化的性质.     

热态下介观电感耦合电路中的量子涨落

在对真空中介观电容耦合电路进行量子化的基础上,采用Lewis-Riesenfeld不变量理论及时间独立的哈密顿系统的知识对在热态下的电感耦合的介观电路中的量子涨落进行研究,并将结果与在绝对零度情况下进行比较.结果表明热态下介观耦合电路中的量子涨落与组成元件的参数和温度有关;并且电路系统在一定温度下的不确定关系比在绝对零度下更为明显,温度越高、涨落越明显.     

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