基于内容推荐算法和余弦相似度算法的领导决策辅助信息系统

【目的】为研究符合党政机关辅助决策特点的决策辅助系统,帮助领导快速、准确收集查找决策辅助信息,提高党政机关领导决策效率和准确性。【方法】基于内容推荐和余弦相似度算法设计了决策信息检索引擎,并结合决策信息库、用户决策特征库、决策信息采集子系统、决策信息推送子系统设计研发了领导决策辅助系统。【结果】系统在党政机关的决策辅助系统中进行了应用验证。系统可根据领导输入的关键字及领导的关注偏好进行决策辅助信息推送,推送结果准确率较高,符合辅助领导决策预期。【结论】基于内容推荐和余弦相似度算法的领导决策辅助信息系统根据用户偏好和特征进行决策辅助信息推荐,具有较好的准确性和针对性,开辟了党政机关决策辅助系统设计建设的新思路。     

油田增产措施优化方法

根据油田生产实际,确定了目标函数和约束条件,建立了最优规划模型,据此做出最佳的措施配置决策,并根据影子价格分析了决策的调整方法.     

决策概念格及决策规则的提取

针对含有决策信息的决策形式背景,提出了决策概念格模型,并定义决策概念格中的决策规则及规则的置信度和支持度,用户可根据实际的需求,从规则中提取满足最低置信度及支持度的规则.     

基于油液监测的船舶机械维修决策

进行了基于油液监测的船舶机械维修决策研究,介绍了主要研究结果,特别是给出了维修决策的模型.结果表明:油液监测技术对船舶机械是有效的,根据监测结果可以作出维修决策.     

一类群决策问题的最优分配解法

在群决策中存在着多个决策者根据自己的知识、经验和偏好独立选择决策方法 ,对决策方案集作出决策后 ,应综合确定群体决策方案的多人多指标群决策问题 .针对这类决策问题具有决策信息量较少 ,而决策一致性较差的特点 ,分析了总体偏差法、足码法及其相关改进方法的优缺点 ,提出了一种多人综合评价的最优分配解法 .该方法通过建立决策方案集与决策名次之间的关联矩阵 ,并根据关联矩阵对方案集进行分类 ,在此基础上构造最优决策模型 ,利用整数规划中的最优分配解法求解最优模型 ,从而得到方案集的综合排序 .该方法简单实用 ,并且克服了总体偏差法、足码法及其相关方法的不足     

一种基于粗糙集的决策算法挖掘方法

属性约简和属性值约简是利用粗糙集理论从决策表中挖掘决策规则的基础,挖掘决策规则是粗糙集理论的重要研究领域之一。本文根据属性的重要度和条件差别矩阵来进行条件属性约简,找出有效约简。同时定义了决策表的不一致度,并根据属性重要度来进行属性值约简,在保持决策表不一致度不增加的前提下挖掘出决策规则,该决策规则集满足独立性、覆盖全域性、可接受性和一致性,即决策规则集为决策算法,最后运用实例对该方法的有效性进行说明。     

论风险型决策过程中的信息价值

本文根据决策论的有关知识，探讨了风险型决策过程中信息的价值及有效性问题。     

基于属性测度理论的群决策效果评价

群决策效果的好坏是检验群决策科学与否的主要依据.为客观地评价群决策的效果,从决策效率和决策质量两个方面建立了评价指标体系,考虑了各指标的权重.根据属性测度理论建立了综合评价模型,并以数例进行了说明.结果表明,采用置信度准则的属性测度理论,避免了模糊综合评价等方法分级不合理的情形.     

采用邻域决策分辨率的特征选择算法

针对目前基于粗糙集模型的特征选择算法无法直接应用于数值型数据、必须经过离散化过程而造成决策信息丢失的问题,提出了一种基于邻域决策分辨率的特征选择算法。该算法根据邻域信息粒中决策分布与其分类能力间的关系,提出了邻域决策确定性(Nc)来衡量单个信息粒的决策分辨能力;并根据特征向量空间上所有信息粒所具有的Nc累加值,定义了邻域决策分辨率作为特征子集上决策可分辨性的量度,从而将名义型和数值型数据统一在同一特征选择算法框架下。仿真实验和实际应用的结果表明,该算法性能优于目前主流基于邻域粗糙集的特征选择方法。     

不确定情况下DCPM的应用

简要介绍了决策关键线路法(DCPM),探讨了决策网络计划中在工期和费用不确定的情况下,根据已知各种可能发生的概率,应用DCPM计算各计划方案的费用及对计划方案进行决策的问题。     

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

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