公路施工组织网络资源优化的启发式算法

对于工期限定、资源均衡和资源有限、工期最短的2种资源约束情况，分别提出了逐步调优法和资源分配法2种启发式算法。在工期限定、资源均衡中，通过利用平衡性指标变动公式计算非关键工序的ΔHR值作为工序能否进行移动的判定界限，且应用平衡性指标HR作为网络计划实现优化的定量指标。在资源有限、工期最短中，通过计算每道工序的优先系数Pij，按其值由大到小作为各工序调整的优先准则，从而合理安排各工序的开始时间，以保证实现网络的资源优化。     

资源受限条件下公路工程进度计划优化方法

针对资源限制条件下的公路工程进度安排问题，讨论了资源分配的优先准则和工作调整步骤，对比分析了优先系数方法和资源调配方法的优化结果，在优先系数计算公式中考虑“工作最早完成时间”参数，对优先系数计算公式进行了改进，以提高模型的适应性；应用“约翰逊-贝尔曼”法则，对新参数的合理性作了进一步论证。分析结果表明，改进后的模型能够更合理地确定发生资源冲突时各项工作的先后顺序，可迅速有效地得到资源限制条件下的最短工期计划。     

多资源均衡的网络计划优化方法

给出了可行计划、可行部分计划等一些概念，介绍了可行部分计划间的优势关系以及与之有关的两个定理，在此基础提出了一种解决工期最短、多资源均衡的网络计划方法。     

复杂工程施工系统资源优化模型及其应用

对于复杂工程施工系统，工期一定、资源均衡的资源进度计划是需要解决的一个重要且有相当难度的问题．首先利用程序实现了在工程实践中运用的两种经典模型，即削峰填谷模型和最小方差模型，并对比分析了各自的特点；然后引入近年发展起来的遗传算法模型，并加以改进实现．最后将三种模型应用到某大型水电站地下洞室群施工系统资源优化中，获得了各自的仿真优化计算结果．通过比较分析可知，遗传算法模型相对最优，能够很好地满足实际的施工需要。同时也为此类问题的模型选择提供了依据．     

一种网络计划的综合优化模型

从网络计划中工期、费用和资源三者的综合优化更具有理论、现实和经济上的意义出发 ,提出了一种综合优化模型 .首先进行工期 费用的优化 ,再进行资源有限 工期最短的优化 ,最后运用模糊综合评判选出最优的方案 .在该优化方法的基础上 ,开发了综合优化的软件系统 ,并已用于实际工程 ,取得满意效果     

一种网络计划的综合优化模型

从网络计划中工期、费用和资源三者的综合优化更具有理论、现实和经济上的意义出发,提出了一种综合优化模型。首先进行工期－费用的优化,再进行资源有限－工期最短的优化,最后运用模糊综合评判选出最优的方案,在该优化方法的基础上,开发了综合优化的软件系统,并已用于实际工程,取得满意效果。     

CPM中工期分阶段控制及资源消耗均衡优化

本文为解决工程计划中分阶段控制工期问题,在CPM网络的基础上提出一种新的网络形式—连锁网络、及其相应的工期控制数学模型与计算方法;针对这种网络计划中的一种主要资源消耗均衡优化问题,给出数学模型及其求解方法,对多种资源消耗均衡优化问题提出简便的处理意见;并介绍了为实现上述两目标所编制的通用电算程序的功能及其适用性.     

结合工期与成本的工程管理优化方法

在建筑工程中，工期短、成本低、质量优是人们追求的目标。其中，工期与成本是相互联系和相互制约的，要加快施工速度、缩短工期，资源的投入就增加、有些费用也会增加，结果成本提高、效益下降。因此，费用优化是寻最低成本时的最短工期，或按要求工期条件下寻求最低成本的施工计划。     

网络计划的优化在工程进度控制中的应用

简要介绍网络计划技术,分析了资源有限,工期最短及工期—成本优化原理,并通过实例表示优化计算的方法与过程。     

多模式下装配式建筑工程资源受限调度方法

针对以往装配式建筑调度研究中,主要基于一个活动只有一种固定资源投入和固定工期的执行模式,而实际调度过程中多种资源投入和不同工期的多种执行模式普遍存在的问题,以及装配式建筑一体化建造建模方法的不足,建立以装配空间工期最短,以及在装配空间工期最短限定下的生产空间工期最短的多模式资源约束模型,在该多维空间调度模型的基础上,设计了一种搜索能力强、能有效求解该问题的布谷鸟算法(CS)。最后通过装配式建筑项目实际案例分析和遗传算法(GA)的性能对比,证明本文构建的调度模型和算法设计能有效的解决多模式下装配式建筑工程资源受限调度问题,丰富了装配式建筑项目调度这一领域的理论方法。     

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