沥青罐自动加热控制概述

沥青搅拌站原材料沥青的加热有各种方法,其中导热油加热沥青是采用导热油作为载热体的加热方法,是有机载热体加热的一种形式,近年来在我国得到普遍推广应用。导热油是一种导热性能良好的化学物质,在一种专用加热炉内加热导热油,然后用油泵将热导热油输送到待加热沥青罐内,通过热传导进行热交换加热沥青。经过热交换后的导热油再输送回到加热炉内加热再输出去,成为—个封闭的加热、放热循环系统。导热油加热沥青的方法与其他加热沥青的方法相比,全系统在常压下工作,设备不受压,运行安全可靠,工艺流程简单方便,生产效率高,加热成本低,劳动强度低,环境污染小,沥青受热均匀,不会损坏沥青的原有性能。因此,导热油加热是一项先进的加热技术,在我国得到广泛的应用。     

导热油系统设计中主要参数确定

导热油载热体加热系统节能、热效率高、传热均匀并可精确控制温度.导热油加热技术目前国内外经济实用温度为100～400℃,且运行安全,投资及运行成本低.     

超稠油热媒加热系统设计

针对超稠油需要较高的处理及输送温度,通过对加热设施的比选,采用导热油做为加热超稠油的热媒,对导热油系统工艺流程进行描述,并对热煤系统进行详细的设备计算,选出经济合理的设备,提高了超稠油加热系统的安全性、可靠性和经济性.     

沥青混凝土路面施工控制要点

一、沥青混合料的拌和 （1）沥青混合料施工控制温度见下表。 （2）沥青混合料的拌和、施工温度应根据所用沥青的粘温关系曲线确定。对沥青材料采用导热油加热，一般加热温度应在160-170℃范围内，矿料加热温度为170-180℃，沥青与矿料的加热温度应调节到能使拌和的沥青混凝土出厂温度在150-165℃，不准有花白料、超温料，     

合成导热油在使用过程中品质变化的测定和评价研究

通过对合成导热油加热过程的分析，提出了确定使用中的合成导热油品质变化程度的六个项目和测定方法，并提供了评价使用中的合成导热油品质变化的指标。分别对苏州首诺化工有限公司两个型号的4批产品进行了测定和评价，取得很好的效果。     

红外辐射加热过程分析

根据物体对辐射的吸收理论，阐明当光辐射波长与金属氧化物共振吸收波长匹配时，辐射能量将全部被吸收。由一定成分的金属氧化物组成的红外涂料，将产生特定波段的红外辐射，在金属加热过程中红外辐射传递将起着快速加热的作用。     

加热率对比及大气加热性质的研究

首先对比分析了气候平均的ERA与NCEP再分析的全球加热率资料，以及两套资料在青藏高原地区的差异。发现在全球范围内，主要差异在于ERA的总加热率比NCEP的总加热率普遍要大，NCEP资料优于ERA资料。再利用NCEP资料分析高原的加热性质及加热的季节变化规律，发现对于青藏高原主体（80-100°E、27．5-37．5°N）而言，平均的辐射冷却全年少变；高原在夏季表现为强大的热源主要由潜热加热引起，感热加热次之，冬季的冷源则以辐射冷却为主，过渡季节的急剧变化主要因感热的变化引起。     

65Nb钢中的相关系研究

通过加热－冷却－组织分析法，研究了含铌基体钢６５Ｃｒ４Ｗ３Ｍｏ２ＶＮｂ（简称６５Ｎｂ）从１５００℃至室温不同温度下，钢所处的相区及不同冷速条件下相组成的变化，初步探讨了６５Ｎｂ钢中的相关系。     

模锻件少无氧化加热法的探讨

在锻造行业中，模锻件毛坯在加热过程中如何避免表面氧化的问题是锻造行业技术革新与技术改造的重要课题。本所介绍的加热方法及加热设备将有助于这一问题的解决。     

赤道加热对大气波动的影响

研究了赤道大气加热对大气波动的影响，结果表明：(1)赤道加热可以产生赤道对称的定常气压波动，其强度与加热特别是凝结加热密切相关；(2)当加热强度变化时，可激发产生东移的开尔波和西移的Hossby波重力波。     

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