耦合可再生能源的分布式联供系统设计及运行策略优化

基于通用数学建模(the general algebraic modeling system,GAMS)软件,针对耦合可再生能源技术的分布式冷热电联供(renewable energy coupled combined cooling,heating and power,RCCHP)系统构建数学模型,并结合上海市某综合区域为案例,选取2项经济性指标和1项环境性指标,对4种情景下RCCHP系统的运行情况进行模拟计算与分析,分析该系统的设备组合、逐时运行策略、经济性与环境性,同时分析了可再生清洁发电技术与能源政策对分布式多联供系统的影响.结果表明,夜间采用电网购电与风力发电互补供应电负荷、白天使用CCHP耦合风力发电联合互补供能是经济性最佳的运行策略,能够抑制可再生能源的波动性并且实现多种电能的完全消纳.与传统分产(separated production,SP)系统相比,RCCHP系统能够极大地降低系统对电网的依赖度,减少耗气量,同时极大地提高系统的环境性,但其较高的初始投资费用限制了其经济性与实用性.     

空调不同送风方式的应用比较

文章阐述了地板送风、工位送风和置换通风的基本原理,分析了影响三种送风方式热舒适性的主要因素,对三种送风方式的使用条件、热舒适性及系统运行能耗进行了比较。     

基于智能手机的公交运行舒适性测度指标研究

为量化分析公共汽车运行过程中行驶平顺性以及车体振动状态对乘车舒适性的影响.以智能手机作为数据采集终端,通过对速度、经纬度数据的统计分析构建表征平顺性的多维变量,并以主成分分析法降维获得平顺舒适性指标;另一方面,通过对高频采集的加速度数据进行傅氏变换构建振动舒适性指标.该研究弥补了以往研究中忽略车辆运行状态对舒适性影响的不足.通过多项Logit回归法分析调查数据表明,该研究基于智能手机采集数据所构建的舒适性测度指标值能客观反映乘客对公交运行状态的舒适性主观感知.     

冬季夜间乘员舱内热环境及人体热舒适性研究

采用试验与数值模拟相结合的方法对冬季夜间乘员舱内热环境不均匀性进行了研究,得到不同送风模式下乘员舱内温度、速度不均匀度.接着基于Stolwijk人体热调节模型,采用Berkeley热舒适评价模型对乘员热舒适状态进行模拟,对比分析了2种送风方式下的人体热舒适性.最后通过对实际送风工况、基于相同送风焓值的等温送风工况以及基于驾驶员前方等效来流的均匀热环境工况的研究,发现在不均匀热环境下人体更易处于不舒适的状态.     

民用飞机客舱舒适性研究

在民用飞机设计中,安全性、舒适性和经济性是主要考虑的三个方面,而舒适性更是航空公司和旅客非常关注的内容。本文初步探讨了影响民用飞机客舱舒适性的各方面因素,为如何提高客舱舒适性提供了参考。     

空调间歇运行模式下外墙内外保温的能耗特性对比

采用数值计算的方法,对比了不同使用时间段的建筑物在不同空调运行方式以及不同热源强度条件下分别采用外墙外保温和外墙内保温两种保温形式时的能耗特性.结果表明,对于白天使用的建筑物,采用外墙外保温更有利于降低建筑物的空调能耗.对于夜间使用的建筑物,若空调器在使用时间段内持续运行,采用外墙内保温更有利于降低建筑物的空调能耗;而在使用时间段内利用建筑物的蓄冷,空调器间歇运行时,则需评估建筑物热源的大小以确定外墙保温形式.适宜的外墙保温形式的选取应当综合考虑建筑物的使用时间段、空调器的运行方式以及建筑物热源强度三方面的因素.     

基于视觉负荷的公路隧道进出口环境改善范围

在大量动视点行车实验的基础上,提出了以"瞳孔面积最大瞬态速度值"(MTPA)为视觉负荷评价指标.利用该指标对高速公路隧道进出口驾驶员视觉障碍与驾驶视觉舒适性及视觉负荷程度进行了相关分析,得出隧道进出口在白天、夜间不同限速条件下视觉环境应加强改善的范围,并提出了利用植物、照明加强及路面色彩等改善隧道进出口"黑洞"或"白洞"效应的措施.     

电力生产企业经济性运行的开放式系统构架技术

在电厂虚拟机组建模、分布式组件以及实时数据处理技术的基础上,提出了一种电力生产企业经济性运行开放式系统构架,实现了经济性运行分析、成本核算、实时数据处理、燃料设备管理、信息发布以及人机交互平台等核心模块.最后,以某电厂的发电煤耗分析为例,对实现软件的关键模块进行了验证,为电厂企业资源规划及经济性运行提供完备的技术支持.     

交流变频调速风机盘管系统研究

采用自主开发的风机盘管控制器,设计了一种新型的具有网络控制功能的交流变频调速风机盘管系统,可根据室内温度采用变频方式自动调节风机转速.文章对该系统的运行能耗、舒适性进行了实验研究.结果表明:该系统运行稳定可靠,相对传统的三档风速、手动调节的风机盘管系统,节能率最高可达65%,同时具有更好的用户舒适性.     

影响住宅建筑空调方式因素探讨

住宅空调系统应以满足人类居住的舒适性、健康性为前提,以保护环境、提高能源利用率为原则,以系统的经济性为基础进行选择．探讨了影响住宅建筑空调方式的因素,认为在选择住宅建筑空调方式时,要进行决策因素综合性分析,从而选出最佳的住宅建筑空调方式．     

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