黑河流域（干）水资源优化利用

以黑河流域（干）水资源基本特征和水资源开发利用现状及其对生态环境的影响为基础，根据上、中、下游统筹兼顾，经济效益、生态环境效益和社会效益相结合的原则，提出并建立了基于动态规划法的流域水资源优化利用方案和优化管理数学模型。结果表明，动态规划法对解决水资源供需矛盾等问题是可行的。     

缺水地区水资源优化分配模型研究

本文应用大系统分解协调法建立地区水资源优化分配数学模型，以递阶动态规划法阐明了求解地区水资源优化分配数学模型的思路，即“化大为小”和“集小成大”，所谓“化大为小”即将复杂的大系统优化问题化为易于求解的“小”系统优化问题，在求解小系统优化问题的基础上，将它们组合起来，利用动态规划法逐级优化，求出原复杂大系统问题的最优解，并以实例说明模型的求解过程．本模型更适于求解非线性、多变量、多约束的复杂大系统同题．适用于不同地区水资源优化分配．     

动态规划法在地层测井曲线对比中的应用

动态规划法能够较好的解决地层的厚度不同、地层缺失、地层尖灭等带来的地层对比难度,因而越来越深入地应用于地层测井曲线的对比中.但目前动态规划法多用于层序地层单元对比上,其要求两井已经合理分层,这就限制了动态规划法的应用范围.本文提出用在基准线左右震荡而产生的波形序列来描述测井曲线,其中孤立的波形为描述曲线的基本单元,通过提取每个波形的波宽、波幅、面积、质心比特征,借助波形之间的马氏距离,就可用动态规划法在目标测井曲线中计算出与模式测井曲线最相似的子段.这样,在不知两井的地层划分时,任给一段测井曲线数据,在其邻井中均能找出与之最相似的波形匹配段,为地层对比提供依据.     

多段决策的摹矩阵法及其在摆起控制中的应用

摹矩阵方法是解决多阶段决策寻优问题的一种极为简捷的方法。该方法在一定程度上可以替代动态规划法而更有效地解决许多最优控制问题。通过将倒立摆的摆起控制表示为一个求最短时间的多阶段决策问题,可以利用摹矩阵方法寻找单级倒立摆摆起控制的最优路径与最优决策。对一轨道长度受限的单级倒立摆的仿真与实时控制,证明该方法是有效的。     

多目标跟踪动态规划法的算法实现

本文提出了在密集环境下多目标跟踪动态规划法的算法实现问题,给出了航迹质量的评价方法和起始跟踪的方法。     

二维扩压器壁面最优速度分布的动态规划法研究

本文运用动态规划法原理和能预测湍流边界层分离的经验公式,建立了二维、对称扩压器优化命题的物理模型和适宜于动态规划法求解的数学模型,并得到满足约束的壁面最优速度分布。该计算结果与实验结果及用Pontryagin极大值原理的计算结果均甚为吻合,该方法可以推广至不对称扩压器的优化命题中。     

两足步行机器人动态步行规划及仿真

根据双足步行机器人动态步行过程中必须满足的动态关系式,提出了动步态规划的两步规划法,从而既满足了机器人步行过程中的基本要求,又保证了系统能够实现动态协调运动。在此基础上,对无冲击步行机器人动态步行过程进行了规划和仿真。结果表明,两步规划法满足了动态步行的要求。     

动态规划方法在道路施工管理优化中的应用

动态规划法是运筹学中一种常用的优化算法,可以用来求解约束条件下的函数极值问题。本文通过对路面养护管理的特点分析,引入动态规划的方法,并用动态规划的方法建立道路施工管理系统数学模型,给出计算流程,以达到路面管理系统优化的目标。     

材料性能优化任务中的动态规划方法

在材料科学中,复杂动态规划方法是为在不确定条件下寻找结构复杂的非稳定动态目标的轨迹并进行最佳控制而发展起来的,为此,采用未知(不确定)的数学模型,演化规划成为动态规划及综合的非稳态目标的统一,这种先进的综合方法已成功用于解决铸模中合金熔体结晶时电流处理的最佳参数获得问题。     

中药智能配药系统特点及其取药运动的优化算法

在分析双药柜中药智能系统配药机构的特点和配药运动过程的基础上,提出了运用有限动态规划法解决双药柜中药配药运动的路径智能优化问题.经仿真试验证明,它能使配药系统在现有的物理配置下,发挥较优的配药性能.     

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     

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