认识矛盾,解决矛盾,研制燃油少无氧化加热炉

随着精密锻造工艺的迅速发展,对坯料的加热提出了更高的要求,实现对坯料的少无氧化加热,已成为发展精密锻造工艺、提高锻件精度和表面光洁度所必须解决的一个十分重要的问题。 为了加速社会主义建设,推广应用精密锻造工艺,湖北齿轮厂的工人师傅和我院的工农兵学员、教师三结合,以阶级斗争为纲,实行教学、科研和生产三结合,进行研制燃油少无氧化加热炉,并且在不断解决矛盾的过程中使之逐步提高。实践证明,燃油少无氧化加热炉的研制和提高的过程,体现了一个由量变到质变的发展过程,一个不断地认识矛盾,解决矛盾的发展过程。     

机械行业节能技术改造的实现——以兰州兰石集团公司为例

介绍了通过用高新技术和先进适用技术对企业锻造加热炉、工业锅炉传统设备的节能改造项目实施,做到节能降耗,提高能源利用效率,达到节约资金、降低生产成本的目的。     

锻造生产的节能和噪声等问题探讨

分析了国内锻造节能状况，节能潜力及措施，锻造工业噪声的产生、危害及控制措施。     

浅谈我国轧钢生产节能降耗技术及合理化建议

文章阐述了加热炉节能、连铸坯热送热装、低温轧制与轧制工艺润滑、在线热处理等先进技术，并指出轧钢生产的节能重点应落在轧钢加热炉的节能上，最后对轧钢生产节能降耗提出几点建议。     

多组盘管式原油真空加热炉设计

多组盘管式原油真空加热炉汇集其他各燃油燃气真空锅炉的优点而设计适合油田环境的新型加热炉。它采用真空相变换热技术,壳体内压低于大气压,无爆炸危险,换热盘管采用U型设计,制造简单。主要用于油、气集输中原油、天燃气、井产物的加热,同时也可用于民用采暖供热水。具有安全性好,操作简单,用途多种,节能和使用寿命长等特点。     

连杆精密锻造新技术

开发了连杆精密锻造工艺及生产线，研制了楔横轧机自动制坯，楔横轧模具三维计算机辅助设计，感应加热炉自动上料，毛坯料温自动化分选，切边、冲连皮，热校得合模具等多项新技术。     

锻造生产的节能和噪声等问题探讨

分析了国内锻造节能状况,节能潜力及措施,锻造工业噪声的产生、危害及控制措施。     

燃油添加剂对内燃机性能影响的试验研究

石油能源日益枯竭使节能问题全球性的重要课题，本文就燃油添加剂对内燃机性能的影响进行了实验研究，以探讨内燃机使用燃油添加剂实现节能的机理。     

轧钢加热炉节能理论及提效方案规划与评价

对轧钢加热炉生产过程的能效分析评价是开展加热炉节能工作和发展加热炉节能技术的基础.针对加热炉的能效问题,建立了包含加热炉热流、流分析的能效分析模型,以热效率、效率、标准燃料消耗量作为能效评价指标,对加热炉实际生产案例进行了能效评估;结合加热炉所处热轧流程的工作特点具体分析加热炉能量损失原因,将其划分为可避免能量损失与不可避免能量损失,前者为加热炉前后工序的不匹配引起的能量损失,后者为加热炉在理想工序匹配条件下由于设备工作过程固有限制而引起的能量损失;根据能量损失原因相应地提出工序匹配和余热回收这两种能效优化技术方法,利用两种方法对加热炉实际生产案例进行了能效优化分析,并以节能率、优化后加热炉的标准燃料消耗量为评价指标对优化结果进行评价,结果显示两种方法的节能率分别为7.71%和14.69%,优化后加热炉的标准燃料消耗量分别为47.29 kg/t(标煤)和44.29 kg/t(标煤),两种方法可同时应用于加热炉的能效优化,同时使用时,其综合节能率为23.56%,加热炉热效率由49.36%升至60.99%,效率由41.83%升至47.11%,标准燃料消耗量由51.12 kg/t(标煤)降至40.98 kg/t(标煤).     

轧钢生产中节能技术分析

轧钢生产耗能占全国的能耗大,节能的潜力很大。推进轧钢技术进步是继续进行生产节能的关键。文中介绍了加热炉节能、连铸坯热送热装、低温轧制与轧制工艺润滑、在线热处理等先进技术,并指出轧钢生产的节能重点应落在轧钢加热炉的节能上。     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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