网络信息资源的经济效益评价

在论述网络信息资源的定义和特征的基础上，阐述了网络信息资源经济效益评价的必要性，并提出了网络信息资源的经济效益评价的评价体系，包括直接和间接评价指标两个方面，采用了利润指标测度法、决策树法、用户评价法和综合评价法。     

试述网络信息资源指标评价

根据目前国内外网络资源评价的现状,提出网络信息资源评价的必要性,并对网络信息资源评价指标,网络信息资源评价方法,网络信息资源评价方法目前存在的问题,以及网络信息资源评价研究的发展趋势进行了探讨.     

用概率统计方法评价网络信息资源

网络信息资源以海量存储、迅速增长、动态变化为其主要特征,对网络信息资源的科学评价,不仅有助于更加有效地组织、开发、利用网络信息资源,给用户以指导性建议,而且也可以促进网络信息资源的良性发展.近年来国内外对网络信息资源定性评价大多集中于评价指标的确定,且有些指标之间难免有包含或不十分恰当之处.针对以上问题,提出了定性评价的6个方面的指标以及用概率统计中的期望值与方差对网络信息资源进行评价的观点,并给出了具体的数学计算方法.     

基于用户体验的商务网站信息质量评价研究

信息质量的提升是网站建设的重要组成部分，从用户体验的角度对网站信息质量进行评价，有助于改善用户对网站的满意度，从而提高网站的竞争力。该文基于用户体验的视角构建了企业对顾客模式（Business to Customer，B2C）的电子商务网站的评价指标体系，使用层次分析法确定了各指标的权重，并选取了OPPO等6家手机网站作为研究对象进行模糊综合评价与模糊聚类分析。研究结果表明，OPPO与荣耀网站整体信息质量处于第1层次，各网站商品信息指标得分普遍较高，服务信息指标得分较低，而其它指标得分存在着一定的差异。     

政府体育部门网络信息资源建设评价概述

阐述了体育网络信息资源评价的目的、意义、方法和指标,归纳出体育网络信息资源评价的方法,主要包括第三方评价法、网络信息资源用户评价法及由文献计量学引中和发展而来的网络计量法.     

网络信息资源评价方法的研究

论述了网络信息资源评价的必要性,介绍了网络信息资源评价方法的现状,分析了定性评价、定量评价以及综合评价3类网络信息资源评价方法的优缺点。     

稀硝酸清洁生产评价指标体系

针对稀硝酸生产的特点和清洁生产评价指标的选取原则，建立了包括原材料、产品、资源及污染物在内的稀硝酸清洁生产评价指标体系，采用统计剔除层次分析法确定了各指标的权重，构筑了稀硝酸清洁生产水平的评价方法，最后根据国内外稀硝酸生产运行数据。结合某稀硝酸生产企业，对此加以应用说明。     

基于层次分析法与加权叠加分析模型的攀西地区钒钛磁铁矿开发利用评价

在对攀西地区钒钛磁铁矿资源开发利用现状进行调查研究的基础上,建立了由目标层、中间层、指标层构成的3层评价指标体系;运用层次分析法确定各评价指标的权重,并采用加权叠加分析模型计算评价指数,对攀西地区各矿区钒钛磁铁矿资源的开发利用情况进行评价。评价指数越大,钒钛磁铁矿资源的开发利用程度越高。评价结果较好地体现了攀西地区各矿区对钒钛磁铁矿资源的开发利用程度。     

基于Fuzzy－AHP的高校图书馆信息素质教育模型评价研究

通过借鉴国内外信息素质评价标准,依据信息素质的含义和构建原则,在广泛征求专家建议的基础上,运用层次分析法构建了高校信息素质教育评价指标体系,确定各评价指标及其权重;运用Fuzzy－AHP评价方法,建立了信息素质层次结构评价模型,以对大学生的信息素质教育进行实际评价。     

资源型城市技术创新生态系统评价研究

为了推动资源型城市技术创新生态系统建设,基于生态学理论和可持续发展理论,通过对资源型城市技术创新生态系统内容及特征的分析,构建其评价体系框架,并运用网络层次分析法(ANP),借助Super Decisions软件确定各评价指标的权重,从而构建资源型城市技术创新生态系统评价指标体系,并对黑龙江省8个资源型城市技术创新生态系统效能进行评价分析。     

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.     

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