太阳能辅助加热密集化烤房应用研究

阐述了白城烟草公司太阳能辅助加热气流上升式连体密集烤房技术的原理,设计了太阳能辅助烤烟系统,对烟叶实际烘烤节能效果进行了实验和分析,达到了预期目的,该方法可以在密集化烤房的节能改造中进行推广。     

空气能热泵烤房与燃煤密集烤房烟叶烘烤效能对比研究

为探究空气能热泵烤房应用于烟叶烘烤的经济性和适用性,以烤烟品种中烟100为试验材料,对比分析空气能热泵烤房和燃煤密集烤房对各部位烟叶烘烤的综合成本、烤后烟叶经济性状,并进行了两种能源类型烤房的空载升温对比试验。结果表明,与燃煤密集烤房相比,空气能热泵烤房较燃煤密集烤房每千克干烟叶烘烤可降低成本43.48%,在投入运行9年之后累计综合成本开始低于燃煤密集烤房,烤后烟叶均价提升9.67%,空载条件下各温度点之间升温速率均衡,平均升温速率快于燃煤密集烤房。空气能热泵烤房在节能省工、增质提效方面有显著效果。     

混合能源密集型烟叶烤房烘烤试验

为了提高烟叶的烘烤质量,降低烘烤能耗与人力成本,本文采用煤、电、油作为供热能源,配套密集烤房作为试验烤房,与传统的单能源密集烤房进行烘烤对比试验,其中:两类烤房的鲜烟叶的装烟量为4500 kg左右,采用挂竿方式进行烘烤。结果表明:与普通密集烤房相比,混合能源密集烤房中1 kg干烟的能耗为2.2元,降低了0.8元。对两类烤房烘烤的烟叶进行评级,混合能源密集烤房的上中等烟的比例达81.46%,比普通烤房比例高出6.91%;混合能源密集烤房的1 kg干烟的收购均价为21.92元,比普通烤房高出0.43元。     

云烟-12型4层与常规3层密集烤房的性能对比

对云南省昆明、玉溪、曲靖、红河、楚雄、大理、昭通、保山、文山、丽江、普洱和临沧12个主产烟区的云烟-12型4层密集烤房与常规3层密集烤房的烤烟效果进行了对比研究.结果表明:云烟-12型4层密集烤房烤能为1.20~1.67 hm2/房,较常规3层密集烤房平均提高了24.47%;烘烤过程中2种烤房的平面和垂直干球和湿球温度差无明显差异;2种烤房的烤烟质量相当,但云烟-12型4层密集烤房的烤烟均价略高于常规3层密集烤房的烤烟;云烟-12型4层密集烤房的烘烤能耗较常规3层烤房明显降低.     

密集烤房在烤烟生产中的应用探索

本文以云烟87为例，采用普通烤房和密集烤房从烟叶质量、能耗量、利用率、烘烤成本等方面进行了对比分析，突出密集烤房烘烤技术的先进性。并根据烤烟实际情况调试出最佳工艺参数进行生产，推广密集烤房的应用。     

不同材质换热器密集烤房能效试验研究

对耐火材料、陶火管、金属材料等3种换热器密集烤房的能效进行对比试验。结果表明，三者的干烟能耗综合成本并无明显差别。其中，陶火管换热器烤房的温度均衡性较好，金属换热器密集烤房的烟囱尾气温度较高，能量损耗较大。     

浅谈大气环境保护与余热利用节能技术——以某煤矿为例

简述了空压机余热利用节能技术,结合现行大气污染防治行动计划,以某煤矿余热利用节能改造方案为例,探讨了空压机余热的利用。     

基于密集烤房温湿度控制仪的设计

针对目前烤烟房温湿度的测量和控制问题，介绍了一种基于密集烤房温湿度控制仪的软硬件设计。系统采用先进的模糊控制技术，使烤房内的温度和湿度按照预存控制曲线变化，并可进行在线修改控制曲线参数，从而提高了烤房内温湿度的控制精度和烤烟质量。     

调控密集烤房内气流运动防控烟叶霉变

以云烟85为试验材料,采用四层气流上升式密集烤房进行烘烤,运用自主设计智能化调控烤房内气流方向运动的设备,改善烤房内的温差、温度、相对湿度和冷凝水含量,进而减少烟叶霉变发生率,并与常规烘烤进行对比。在烘烤过程中的12～48h之间,调控密集烤房内气流运动的设备运行之后,烤房内温差快速下降,并在1.5℃以下的范围进行波动,始终小于对照组;处理组的低温层温度升高,相对湿度下降,顶部冷凝水含量减少;处理组的烟叶霉变发生率低于对照组,于48h时,处理组和对照组的烟叶霉变发生率分别为14.7%和31.6%左右,且处理组的烤后霉变烟叶明显少于对照组。通过合理调控烤房内气流运动的方式,具有明显防控烤中烟叶霉变的效果。     

造纸企业余热回收利用研究

本文介绍了华南地区某大型造纸企业挖掘热力系统节能潜力,实施烟气余热回收和冷凝水回收等余热利用节能改造工程,并分析了该综合余热节能改造方案的工艺技术及技术经济性,通过分析,该综合节能项目节能效果显著,经济效益可观,阐述了该节能改造项目对企业节能减排工作的意义。     

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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