众筹筑屋规划方案设计优化

众筹筑屋是互联网时代一种新型的房地产形势,好的建筑规划方案是众筹筑屋能否正常实施的关键.首先,对方案I的成本、收益、容积率和增值税进行核算,其中,增值税分为普通宅和非普通宅两种模式核算.其次,考虑到参筹者满意度最大和利润最大(即保证成本最低同时售价最高),建立多目标整数线性规划模型,利用理想点法求解,得出11种房型合理的建造套数方案Ⅱ;核算方案Ⅱ后发现回报率未达到25%,需要进一步优化规划方案.最后,根据11种房型的满意度、每平方米差价和方案Ⅱ的套数,用层次分析法进行排名,在保证建筑面积不发生变化的基础上,减少低排名房型的套数,同时增加高排名房型的套数,进行调整,使得回报率达到25%以上,得到规划方案Ⅲ.     

多元单目标线性规划在建模中的应用

文章研究了众筹筑屋规划方案设计问题,运用优化原理,结合我国土地增值税暂行条例,在尽量满足参筹者的购买意愿条件下,建立了以收益为目标的多元线性规划模型,设计出了筑屋最优建设方案,通过Matlab编程计算,求出了各种房型的最优建设数量.     

众筹筑屋方案的规划模型

根据参筹者对11种房型购买意愿的比例,在进行合理假设的前提下,对众筹筑房项目进行了适当简化。运用线性约束优化、主成分分析等方法建立优化模型,得到了投资回报率在25%以上,满意度在50%以上,容积率小于2.28的设计方案。     

线性规划在众筹筑屋规划方案设计中的应用

线性规划问题是一类运筹学所研究的基本问题,它是辅助人们进行科学管理和研究的一种重要数学方法.它是在现有的物质资源条件下,更加有效的利用有限的物质条件,达到经济效益最优化问题.线性规划越来越与人们的生活密切相关,很多生活中的问题都可以转化成线性规划理论得到更有效的解决,众筹筑屋问题便是其中的一个应用.随着互联网时代的到来,众筹筑屋越来越受到人们的关注.作为一种新型的房地产经营模式,因其较为方便、有效的筹款方式和较高的透明度受到房地产商和购房者的青睐.按众筹筑屋方案限定的种类规划各种房型的修建数量,根据实际问题以收益最大化为目标函数建立了优化模型,利用线性规划得出最优规划方案.     

新生代农民工培训满意度及回报率的实证研究——基于四川成都、南充地区的调查

本文基于四川省成都、南充地区的调研样本,采用多分类logistic模型,考察新生代农民工培训满意度影响因素;采用扩展的明瑟收入模型,考察教育年限、工龄与是否参与培训对于新生代农民工增收的影响.研究表明,培训提供的手续办理等公共服务、培训方法、培训实质作用、相关部门意见改进等变量对于培训满意度的影响明显;新生代农民工教育投资回报率依旧很低,参培积极性不强.政府应按需培训,满足新生代农民工的工作技能需求,调动其参培积极性,改善目前的培训现状.     

众筹筑屋规划方案设计的数学模型

文章介绍了2015年全国大学生数学建模竞赛D题的命题,全面核算方案I,为了尽量满足参筹者的购买意愿,建立并求解了线性规划、非线性规划等五个模型,最后用初等方法检验了模型二、四、五.     

基于磁盘动态镜像的技术实现

在网络系统中利用磁盘的静态镜像无法满足服务器系统数据及时更新的需求.提出了在Windows 2000 Server环境下,利用镜像功能对服务器的系统及其数据实现动态备份的方法,取得预期的效果.该方案投资少,易实现.     

可能性投资组合模型

为克服随机可能性投资组合模型和可能性投资组合模型在拟合分布时未考虑相关因素,以至于不足以全面预测证券趋势的问题,将可能性测度应用到不足约束下的投资组合最优化思想中,把风险定义为不能实现的最低组合回报率的必要性测度,提出了可能性分位数投资组合模型和可能性模态法投资组合模型．两模型充分考虑了回报率间的相关关系及专家知识在决策中的重要作用．通过实证研究表明：利用两模型可以得到多样化的结果,更加适应我国的证券市场的发展;掌握了专家知识的量化方法对决策的影响．     

基于演化博弈的众筹市场融资监管分析

互联网众筹市场融资的快速发展为消费者投资带来了极大的便利,但由于发起人和跟投人之间存在信息不对称,使得投资行为存在极大风险.基于演化博弈理论,通过建立复制动态方程,分析众筹平台和发起人策略选择的动态演化过程,得到博弈双方的演化稳定策略.结论表明:对欺骗行为合理的惩罚、对众筹平台高质量的监管以及跟投人较好的维权意识是保证众筹市场良好发展的关键.     

零售商具有灵活决策目标的供应链协调

建立了零售商具有两种灵活决策目标的供应链模型:期望利润最大化和期望投资回报率最大化.分别研究了批发价策略和双部定价策略两类契约下的博弈动态,推导出各自的均衡结果.在此基础上,结合仿真实例,考察了契约柔性对供应链协调性的影响以及契约柔性价值随决策目标的变化情况.结果表明:契约柔性化是协调策略设计的重要思路之一,但其价值因决策目标差异而不同,期望投资回报率条件下协调难度更大.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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