多阶段抽样比率估计及其样本量的选择

讨论多阶段抽样比率估计及其样本量选择的问题 ,给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式 .在调查费用给定及各阶段的样本量为等比例分配情况下 ,给出了各阶段样本量最优选择的一般结果 .     

三和四阶段抽样样本量的选择

在给定的费用函数ｃ＝∑ｃｉｎｉ和从第二阶段起抽样样本量按等比例分配情况下,讨论了三和四阶段抽样简单估计法各阶段样本量的选择问题,并给出了一般结果     

多阶段不等概抽样样本量的选择

在给定的费用函数下，当各阶段不等概抽样样本量分配为等比例分配时，讨论ｎ阶段不等概抽样样本量选择的问题，并给出了一般结果．     

多阶段不等概抽样

给出了任意ｎ阶段不等概抽样总体均值估计量的抽样均方差及其无偏估计量的一般公式     

基于0-1分布的公路机动车起讫点(OD)调查抽样

通过将单个调查点的OD调查抽象成0-1分布,分析了单个OD调查点调查精度要求、抽样率与调查点断面OD量本身特性之间的关系,研究了在简单随机抽样情况下单个OD调查点抽样率的确定方法, 给出了一定精度要求下的OD调查抽样率的推荐值,还比较了不同的抽样方法的抽样效率.结果表明:抽样率随着车流量的增大而减小,样本量则随着车流量的增大而增大,但当车流量足够大时,样本量将不再随着车流量的变化而变化;要求的置信水平越高,精度越高,抽样率越高,样本量也就越大;某一OD点对之间的量占的比例越大,满足该分布所需要的样本量越小;整群抽样的效率通常要比车牌号抽样和等距抽样的效率低,而分层抽样的效率则反之.     

均值的经典与贝叶斯抽样检验

讨论了对数正态总体在变异系数已知条件下,均值的经典抽样方案的简便的直接求解法。还讨论了在标准差已知条件下,正态总体均值的贝叶斯抽样方案的求解法。在较宽的条件下。贝叶斯方案的样本量比经典方案的样本量小得多。     

统计抽样技术在审计测试中的应用

统计抽样在审计测试中的应用意义重大。本介绍了统计抽样的概念，统计抽术在审计工作中的意义，分别举例说明了固定样本量抽样在控制测试和变量抽样差异估计在实质性测试中的应用。     

人口抽样调查中用普查数据的比估计及其均方误差估计

本文主要讨论了分层三阶简单随机抽样下，在人口变动情况抽样调查中利用普查数据构成人口出生率，年出生人口，年中人口的比估计及其均方误差估计问题，也给出了分层三阶等距抽样下比估计的均方误差的两种估计公式。得出的结论也适用于一般的多阶抽样的比估计的情形。     

统计抽样技术在审计测试中的应用

统计抽样在审计测试中的应用意义重大。本文介绍了统计抽样的概念 ,统计抽样在审计工作中的意义 ,分别举例说明了固定样本量抽样在控制测试和变量抽样差异估计在实质性测试中的应用     

基于Parseval框架的多小波子空间抽样定理

研究了基于Parseval框架的多小波子空间中的抽样定理.通过满足一定条件,给出抽样定理在多小波子空间中成立的等价条件.所得结果不仅推广了单小波子空间的抽样定理,而且抽样公式在L2(R)收敛意义下成立.     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with