城市轨道交通工程施工安全事故聚类分析

为确定城市轨道交通工程施工事故的主要类型,并探究全过程的各种风险因素.针对城市轨道交通工程施工安全事故,提出了基于K-means均值的城市轨道交通工程施工安全事故聚类分析的主要流程,分析验证了安全风险分布的重点阶段与主导因素,同时,确定了城市轨道交通工程施工事故的主要类型.研究可以建立安全风险分布阶段及风险因素基本框架,确定分类变量,形成结构化数据库.     

项目决策阶段的工程造价控制

分析了决策阶段造价控制与项目各阶段造价控制间的关系,阐述了项目决策阶段影响造价控制的主要因素及重点,指出项目决策阶段的工程造价,决定了投资者是否投资项目以及投资规模,也对工程造价控制起着关键作用。     

浅谈建设单位工程招标投标阶段造价控制风险与对策

随着电力建设工程项目逐渐增多,建设单位工程造价控制风险日益凸显,工程招标投标阶段是合同价确定的重要阶段,研究招标投标阶段降低风险的方法,具有重要的现实指导意义.文章分析了建设单位工程招标投标阶段造价控制的主要风险因素,并提出了相应的风险管理对策,为建设单位管理建设项目造价风险提供参考.     

浅论工程造价管理全过程控制的重要性

针对目前建设工程造价管理中存在问题及现状,提出解决问题的方法——全过程造价控制,指出工程建设各个阶段对工程造价的影响程度,各个阶段中对造价控制的工作重点。重点分析了加强前期控制的必要性、重要性和可行性,由原先的事后管理转变为全方位的主动控制。     

浅析工程建设前期阶段的造价控制

在分析项目建设的各个阶段对工程造价的影响的基础之上，阐述了业主在项目的立项决策阶段、设计阶段和发包阶段对工程造价的控制，为加强项目建设前期阶段的造价控制提供了理论依据。     

市政工程造价控制之我见

工程造价的控制是一项集管理、技术、质量、施工于一体的综合性系统工程,造价控制贯穿于工程建设的各个阶段.本文通过较为深入的分析,对市政工程如何在项目的各个阶段的主要环节控制工程造价,提出合理的建议.     

浅谈工程造价咨询企业如何参与建设项目全过程造价管理

全过程造价管理是指在工程建设的投资决策阶段,设计阶段,招投标阶段,施工阶段,竣工验收及项目后评价阶段,工程造价咨询企业对工程造价进行全方位、全过程动态的管理和控制。全过程造价控制应贯穿于工程建设的各个阶段,以更好地完成各项工程。同时,对工程造价进行全过程管理(控制)也是工程造价行业发展的必然趋势,是造价咨询业适应市场经济发展的必然结果。     

工程咨询对建设项目造价控制的作用探析

环顾当下的建筑市场,竞争愈发激烈,对工程造价的有效控制是一个具体工程盈利水平得以提高的重要保证,对造价控制的关注度和专业化要求也随之越来越高,为此,工程造价咨询这一行业研究孕育而生了,本文从从工程项目的各个阶段出发,分析工程造价咨询在各个阶段分别起到怎样的作用。     

建筑施工阶段工程造价控制理性探讨

施工阶段是有效控制工程造价、防止施工超预算和施工企业降低成本、取得效益的重要阶段。分析了施工阶段工程造价的影响因素,从提高企业施工阶段的造价管理水平出发,提出了针对性控制工程造价控制的措施。     

浅析公路工程造价控制

在公路工程建设项目三大目标管理中,造价控制贯穿于项目建设的各个阶段。其中最主要的是设计阶段、招投标阶段和施工阶段。在这三个阶段中,存在了大量影响建设成本的风险因素。本文着重分析这三个阶段存在的主要风险因素及对造价的影响,并提出相应的建议措施。     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

正~~