作者: 吕广庶 (北京工业学院)
出处: 钢铁 1985 第7期 P21-26
关键词: 回火方程;回火温度;回火硬度;回火时间;回归分析法;参量方程;计算图;回火工艺;物理意义;回火过程
摘要: 本文找出40CrNiMoA钢的回火硬度与回火温度及回火时间之间的关系,以回归分析法提出其间关系的数学方程式并绘制计算图,并探讨了回火方程式的物理意义。该法比Hollomon回火参量方程P=T(c+1gτ)更为精确。
作者: 傅若农,田林祥,夏方明 (北京工业学院化工系)
出处: 色谱 1985 第3期 P143-145
关键词: 制备和应用;毛细管色谱柱;液晶化合物;二元取代苯异构体;氯化氢
摘要: 把具有适当相变温度的液晶化合物用作色谱固定液,可以有效地分离近沸点的二元取代苯异构体和多环芳烃异构体等难分离混合物,前人在这方面已经作了许多工作。但是,一个至今尚未解决的问题是,由于液晶本身的固有特性,制备性能良好的毛细管柱比较困难,本文为解决这一问题进行了初步尝试。
作者: FAN Tian-you (Beijing Institute of Technology)
出处: 中国物理快报(英文版) 1985 第4期 P153-156
关键词: FORMULA;MOVING;KINETIC
摘要: A kinetic energy formula has been obtained for a moving crack in elasto-plastic medium.It will reduce to the famous Mott\'s formula when the medium is ...
作者: 刁远安 (Beijing Institute of Technology)
出处: 科学通报(英文版) 1985 第1期 P135
关键词: CONJECTURE;cycle;INEQUALITY;easing;Letter;INTERRUPT;二七;十心
摘要: Consider the following system of the Liénard type:A. Lins, W. de Melo and C. C. Pugh have studied this system and made a conjecture that system (*) ha ...
作者: Boddington, Terrence1;Feng, Changgeng12;Scott, Stephen K.13; (1School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom;2Department of Applied Mechanics, Beijing Institute of Technology, Beijing, P.O. Box 327, China;3School of Chemistry, Macquarie University, North Ryde 2113, Australia)
出处: Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics 1984 Vol.80 No.8 P973-983
摘要: The classical treatments of thermal-explosion theory for isolated reactant masses are extended to cover an aggregate of reactant particles embedded in ...
作者: ZHANG, DH;WU, ZY (1BEIJING INST TECHNOL,DEPT 2,BEIJING,PEOPLES R CHINA.)
出处: PHYSICS LETTERS B 1984 Vol.142 No.1-2 P35-38
作者: 李向平 (北京工业学院)
出处: 化学学报 1984 第5期 P403-415
关键词: 简化法则;分子轨道计算;本征矢量;传递矩阵;行列式;权函数;本征值;本征方程;顶点;分子结构
摘要: 建立了Coates图的简化法则,应用此法则可将大分子的复杂结构图逐步简化成简单的结构图,从而简化能级和分子轨道系数的计算。这个法则广泛地适用于各种共轭分子的Huckel分子轨道计算。应用简化法则可解决由很多不同的化学结构串联而成的杂基多基分子结构图的简化问题。对于这种分子的计算,建立了传递矩阵的概念 ...
作者: Feng, Changgeng12;Scott, Stephen K.13; (1School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom;2Department of Applied Mechanics, Beijing Institute of Technology, Beijing, P.O. Box 327, China;3School of Chemistry, Macquarie University, North Ryde, NSW 2113, Australia)
出处: Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics 1983 Vol.79 No.11 P1629-1631
摘要: The dependence on the heat-transfer conditions (Biot number, Bi) of the temperature gradient at the surface, Γ, of an exothermic reactant mass at crit ...
作者: Boddington, Terrence1;Feng, Changgeng12;Gray, Peter1; (1School of Chemistry, University of Leeds, Leeds LS2 9JT;2Department of Applied Mechanics, Beijing Institute of Technology, Beijing, PO Box 327, China)
出处: Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics 1983 Vol.79 No.10 P1481-1498
摘要: Although it is common to neglect the temperature dependence of thermal conductivity and of heat-transfer coefficients in thermal explosion theory, the ...
作者: Fisher, Uriyel1;Leidenfrost, Wolfgang2;Li, Jiashang3; (1Israel Desalination Engineering, Tel Aviv, Israel;2School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, United States;3Beijing Institute of Technology, Beijing, China)
出处: Heat Transfer Engineering 1983 Vol.4 No.2 P28-41
摘要: The need to save energy in power producing and power consuming systems and the fact that evaporative cooling is the most efficient method for heat rej ...
已保存题录(0)