高考原始分数正态拟合检验的统计分析

用经验法则对１９９４年，１９９５年陕西省高考原始分数和总体分布的正态性进行了拟合，用Ｋｏｌｍｏｇｒｏｆ－Ｓｍｉｒｎｏｆｆ方法对样本分布的下态性进行了拟俣优度检验，讨论了实施标准分数转换的条件。结果表明，高考原始分数近似服从正态分布。     

高考原始分数正态拟合检验的统计分析

用经验法则（中位数，均值，标准差，偏度，峰度）对１９９４年、１９９５年陕西省高考原始分数总体分布的正态性进行了拟合，用Ｋｏｌｍｏｇｒｏｆ－Ｓｍｉｒｎｏｆ方法对样本分布的正态性进行了拟合优度检验，讨论了实施标准分数转换的条件．结果表明，高考原始分数近似服从正态分布     

统计假设检验中显著性水平α的最优控制

在α－水平显著性检验中，同时考虑了犯第二类错误的概率．以每次检验的期望损失为目标．对于正态总体参数假设检验的几种情况．求出了α的最优值．     

南沙海区温度细结构正态性检验

对南沙海区观测得的部分温度脉动一深度序列作了正态检验。检验时先用根据序列的自回归模型构成的滤波器滤去序列元素间之相关性产生白噪声序列,而后用Ｘ＾２－拟合优度检验法对此白噪声序列作正态性独立同分布检验并对偏度与峰度作了检验。检验结果表明,除少数样本近侯正态分布外,大多数样本的分布为非正态的,这是在样本内小于内波尺度的不可逆细结构所起的作用。     

带有误差变量的偏度和峰度正态性检验

考虑带有误差变量的正态检验问题，提出了亲折偏度和峰度正态性度验统计量，证明了在零假设成立时，所提出的偏度和峰度检验统计量具有渐近正态的优良性质，模拟计算也表明所提出的检验统计量有良好的功效。     

具有部分缺失数据两个正态总体的估计和检验

讨论了部分缺失数据两个正态总体的参数估计和总体期望相等的似然比检验，证明了估计的强相合性和渐近正态性，并讨论了基于精确分布的检验问题。     

PP偏度,峰度正态性检验的P—VALUES

给出了用于高维正态性检验的ＰＰ偏度，峰度及其偏度，峰度混合统计量，获得了诸统计量极限分布的尾部概率展开式，由此可比较准确而迅速地获得这类检验和各种临界值及其Ｐ－Ｖａｌｕｅｓ。本文的方法也适用于对其它椭球等高分检验Ｐ－Ｖａｌｕｅｓ计算问题。     

在系统应力服从正态分布下k／n（G）结构系统可靠度估计

探讨ｋ／ｎ（Ｇ）结构系统可靠度的统计分析，推导了正态－极值Ⅰ型模式和正态－威布尔模式系统可靠度并给出ＭＶＵ估计。     

多维正态总体零均值的假设检验

讨论了在协方差已知或未知情况下多维正态总体零均值假设检验的问题。首先利用降维法，将多维正态总体转化为一维正态总体，然后利用T－统计量或U－统计量来判断拒绝或接受原假设。     

多元正态分布均值向量变点的Bayes检验

本文讨论了多元正态均值向量变点是否存在的检验问题，并给出了检验统计量，检验的临值和检验的势函数。     

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