生物质燃料固化成型工艺研究

生物质成型燃料作为生物质能源,具有原料来源广泛、可再生、清洁等优点,最近几年得到了快速发展,目前我国也出台了很多相关政策,为它的发展提供了良好的环境。根据中国生物质成型燃料技术产业化现状,对技术、设备、资源等影响产业化的主要因素进行分析,研究了生物质固化成型燃料的各种工艺参数和研究现状。     

生物质能源开发利用概述

伴随经济发展,在世界范围内的能源出现了紧张的问题,并伴有严重的环境污染,在这样的情况下,可再生的清洁能源的开发利用,不但能有效的减少环境污染问题,也将会缓解能源危机。我国的生物质能源利用技术起步比较晚,不过也取得了一些科研成果,主要有沼气技术、生物质固化成型技术、生物质气化技术、生物柴油技术等。     

我国生物质成型燃料产业实证分析

我国生物质资源丰富,生物质能源利用方式多种多样,其中生物质成型燃料技术属于比较成熟的利用技术之一.结合我国生物质成型燃料产业实证进行分析,提出我国发展生物质成型燃料产业的建议.     

生物质块状燃料常温成型的技术特性讨论

生物质能源作为可再生能源越来越受到人们关注。本文阐述了生物质研究现状,探讨了生物质能源致密成型技术。在不同压力下常温成型的一些物理机械特性指标及其主要因素包括:物料含水率,压力,颗粒种类,原料种类,黏结剂等。对国内外研究现状做了总结。通过本文提供的理论依据,为生物质块状燃料成型的设备设计,结构改进及工艺参数提供参考。     

生物质燃料致密成型技术研究现状及发展趋势

详细阐述了生物质燃料致密成型技术的原理以及工艺,分析对比了当前国内外生物质燃料致密成型设备的优缺点,总结提出了未来生物质燃料致密成型技术的发展趋势。     

复合材料基体固化成型工艺综述

树脂基复合材料具有比强度高、比模量高、抗疲劳性能优良、工艺性能良好及具有可设计性等特点,一直受到工业界的重视,各种复合材料产品被应用到各行各业,尤其是在航空航天领域。复合材料从原材料到形成制品的过程,都需经过固化与成型,方法已经有几十种。文中介绍了国内外复合材料主要的基体固化方法、成型工艺和相关研究;固化方法主要有热固化、辐射固化与微波固化等,成型工艺主要有模压成型、渗透成型、缠绕成型与拉挤成型等;同时,对工艺研究与应用也进行了展望。     

生物质型煤成型实验研究

采用冷压成型工艺在一定的压力下生产出生物质型煤,并对型煤的成型性能进行了研究。结果表明,在生物质型煤中,生物质起到了粘结剂的作用。在相同的成型条件下,生物质复合型煤的抗压强度比一般型煤的抗压强度要高,并且把生物质添加量控制在一定范围内时生物质复合型煤的强度随着生物质添加量和成型压力的增大而增大。     

废弃刨花板制备成型颗粒燃料物理性能初步研究

利用废弃刨花板为原料,采用环模制粒机成型设备,把原料压缩成颗粒成型燃料。试验研究生物质成型燃料的物理性质,主要包括生物质的密度、跌碎性、吸水性、渗水性和吸湿性等。结果表明:由废弃刨花板和贴面刨花板制成的生物质成型燃料,其密度、抗跌碎性和抗渗水性的差异较大。在再生木刨花成型燃料中加入杨木刨花,降低了燃料的抗跌碎性和抗渗水性。     

生物质颗粒成型影响因素分析

生物质颗粒作为生物质能源的重要利用形式,研究其成型过程中的影响因素有着重要意义。本文主要从原料、过程、设备三方面研究分析了影响生物质颗粒固态成型的因素,及其对颗粒质量系数(PQF)和颗粒耐久性指数(PDI)等指标的影响,各因素间的作用是相互关联的,其中设备孔型参数是分析研究的重点因素,是颗粒成型设备研究开发进行的前期基础研究。     

生物质平模成型燃料设备及规模化运行系统研究

研究设计了一种具有适应物料范围广、成型燃料直径易变化、生产效率高、能耗低等特点的生物质燃料平模成型设备.为了实现生物质成型系统规模化运行,降低能耗,提高产率,对生物质成型设备进行了合理配置和整合,实现了一体化运行.根据进料量、粉碎量、供热量、出料量、物料含水率等条件变化,对生物质成型设备进行自动化设计,实现了生物质成型燃料系统自动连续稳定生产,提高了设备的集成化水平,减少了人工操作.另外,生物质原料干燥过程采用生物质热风炉提供热源,不消耗传统能源.生物质平模成型燃料设备及其规模化运行研究为生物质资源的能源化利用提供较为合理的途径.     

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