Measurement and Prediction of Interfacial Area on a DistiIlation Tray     

宋海华  李天一  李红海 《天津大学学报(英文版)》2003,9(1)

Ｔｈｅａｃｃｕｒａｔｅｍｅａｓｕｒｅｍｅｎｔｏｆｔｈｅｇａｓ ｌｉｑｕｉｄｉｎｔｅｒｆａ ｃｉａｌａｒｅａｓｉｓｏｆｇｒｅａｔｉｍｐｏｒｔａｎｃｅｔｏｅｓｔｉｍａｔｅｒｅｌｉａｂｌｙｔｈｅｔｒａｙｅｆｆｉｃｉｅｎｃｉｅｓａｎｄｏｐｔｉｍｉｚｅｔｈｅｄｅｓｉｇｎｏｆｄｉｓｔｉｌｌａｔｉｏｎｃｏｌｕｍｎｓ .Ａｖａｒｉｅｔｙｏｆｅｘｐｅｒｉｍｅｎｔａｌａｐｐｒｏａｃｈｅｓｈａｖｅｂｅｅｎｕｓｅｄｔｏｍｅａｓｕｒｅｔｈｅｉｎｔｅｒｆａｃｉａｌａｒｅａｓａｎｄｂｕｂｂｌｅｓｉｚｅｄｉｓ ｔｒｉｂｕｔｉｏｎｓ…  相似文献   

Adaptive Lagrange finite element methods for high precision vibrations and piezoelectric acoustic wave computations in SMT structures and plates with nano interfaces     

张武  洪涛 《Journal of Zhejiang University. Science. B》2002,(1)

ＩＮＴＲＯＤＵＣＴＩＯＮＡｓｗｅｋｎｏｗ ,ｔｈｅｃｏｍｐｕｔａｔｉｏｎａｌｐｉｅｚｏｅｌｅｃｔｒｉｃｄｙｎａｍｉｃｅｑｕａｔｉｏｎｓｆｏｒｈｉｇｈｆｒｅｑｕｅｎｃｙａｃｏｕｓｔｉｃｗａｖｅｐｒｏｐａｇａｔｉｏｎｓｗｅｒｅｏｒｉｇｉｎａｌｌｙｅｘｐａｎｄｅｄｆｒｏｍｔｈｅｇｅｎｅｒａｌｃｏｍｐｕｔａｔｉｏｎａｌｓｔｒｕｃｔｕｒａｌｍｅｃｈａｎｉｃｓ,ａｎｄｔｈｅｆｉｎｉｔｅｅｌｅｍｅｎｔｍｅｔｈｏｄｓ(ＦＥＭ)ｉｎｉｔｉａｌｌｙｆｒｏｍａｅｒｏｓｐａｃｅａｎｄｃｉｖｉｌｅｎｇｉｎｅｅｒｉｎｇ .Ｔｈｅ…  相似文献   

KF-KCl系熔盐的分子动力学模拟     

徐桦 《常熟理工学院学报》2002,16(4):29-32

关于KF-KCl系熔盐的混合过程存在较大争议，一种认为混合过程是吸热的，另一种认为混合过程是放热的。文章对KF-KCl系熔盐进行了分子动力学模拟，所得结果与后一种结论一致。并且在实验中观察到了Cl^--Cl^-的偏径向分布函数的第一峰发生了宽达70pm的分裂，这是尚未见于文献的新结果。  相似文献   

多体回路系统的正则运动方程     

水小平 《商丘师范学院学报》1996,(Z4)

采用绝对坐标定义系统中各刚体的位置，刚体间的运动副及作用在刚体上或刚体间的力，给出了求速度变换矩阵的一般方法．经过约束方程的雅可比矩阵的零空间，用相对坐标建立了多体回路系统的运动微分方程，并进而表示成正则运动方程的形式．  相似文献   

工业机器人的力学分析     

姬清华 《平原大学学报》2005,22(3):116-117

随着机电一体化技术的迅速发展，工业机器人在工业生产中的地位越来越重要，本文从工业机器人的力学分析入手，分别作了静力学和动力学的分析研究，为工业机器人手部及运动各构件提供了力学的分析原理及方法。  相似文献   

一类具有双线性发生率的SEIR流行病传播数学模型     

朱帅  马纯 《雁北师范学院学报》2007,(4)

利用Lasalle不变集原理探讨系统的渐近性态,研究了一类具有双线性发生率且染病期传染的SEIR流行病传播数学模型的动力学性质.得到了疾病绝灭与持续的阈值—基本再生数,证明了无病平衡点的全局渐近稳定性和地方病平衡点的全局渐近稳定性,揭示了潜伏期传染的影响.  相似文献   

带章动阻尼器航天器的非线性动力学分析     

孔令勇  岳宝增 《商丘师范学院学报》2007,23(6):49-51,76

研究带章动阻尼器航天器的非线性动力学特性.应用第二类拉格朗日方法建立航天器动力学方程,并对稳定性进行了分析;应用四阶Runge-Kutta法进行数值模拟,发现激励力矩增大时系统由倍周期运动变为混沌运动.  相似文献   

Vacco动力学方程的形式不变性     

顾书龙  张宏彬  洪求三 《巢湖学院学报》2004,6(3):37-40

研究Vacco动力学方程的形式不变性,给出Vacco动力学方程形式不变性的定义与判据,并讨论了这种形式不变性与Noether 对称性之间的关系,最后举例说明结果的应用.  相似文献   

航空发动机冲击动力学新生研讨课实验教学改革研究     

罗刚  赵振华  刘璐璐  陈伟  周标 《教育教学论坛》2020,(18):375-377

在航空发动机结构冲击动力学新生研讨课中设计了冰撞击和外物损伤模拟实验教学环节,通过设备技术安全改造、实验方案优化、实验大纲编写、分组实验观察等教学手段,将课堂理论教学与实践教学有机结合,加深学生对结构冲击学问题的认识。通过对学生进行问卷调查,对实验教学在新生研讨课中的教学效果进行了总结与分析。结果表明,在新生研讨课中开展实验教学,有助于学生快速深入地掌握课堂教学理论知识,调动学生参与教学活动的积极性,提高学生动手能力,推动学生理解航空特色,对学生规划未来专业方向起到了较好的辅助作用。  相似文献   

Growing Talent for Inclusion: using an appreciative inquiry approach into investigating classroom dynamics     

Mary Doveston  Marian Keenaghan 《Journal of Research in Special Educational Needs》2006,6(3):153-165

This paper reports on an Appreciative Inquiry project called ‘Growing Talent for Inclusion’ which has been running since 2002. The project grew out the authors’ work in a Local Authority Support Service assisting schools to meet the needs of pupils with a range of additional educational needs. Faced with a large number of individual referrals, many relating to the emotional, social and behavioural needs of pupils, it was considered that an eco – systemic approach was required and that a priority was to support pupils and teachers in developing more effective and satisfying interpersonal relationships in the classroom. ‘Growing Talent for Inclusion’ uses Appreciative Inquiry to investigate a management change process which has been used within large organisations and communities but less commonly at classroom level. It is a type of action research which is solution not problem focused and therefore lends itself well to a research focus of improving classroom dynamics. The paper introduces a 4‐D Cycle of Appreciative Inquiry: discovery, dream, design and deliver, as advocated by Cooperrider and Srivastva, 1987, which guides the identification, acknowledgment and amplification of skills pertinent to improving social dynamics within the classroom and discusses the methodological issues which arise from this collaborative, participative form of inquiry. A combination of qualitative and quantitative methods has been used to identify and track the development of attributes for improving working relationships in four different primary and secondary classrooms in three schools. 76 pupils and four teachers have been involved in the project since its inception in 2002 with classes in a further three primary schools using the approach during the academic year 2005–2006. Findings from the project show an increase in the number of pupils with whom other pupils are happy to work, a reduction in the number of pupils identified as socially excluded at the beginning of the project and enhanced capacity of the group in terms of the talents identified for growth. Feedback from staff and students also suggests that the process of noticing and acknowledging strengths has contributed to improvements in working relationships.  相似文献