Modeling of polishing process for electric stainless-steel kettle     

WU Chang-lin  XU Zao-kun  FAN Qing-rong  GUO Min 《重庆大学学报(英文版)》2011,10(4):191-195

The market of stainless electric steel kettles is growing significantly, but the main mechanism for polishing kettles via traditional handwork operations limits the growth of electric kettle manufacturing. Based on the successful multi-tool automatic polishing system for electric stainless steel kettles, regression analysis and orthogonal tests were employed to construct a polishing process model, with a purpose to improve the automatic polishing technology for electric stainless steel kettles. The model reveals the relationship between the surface roughness and processing parameters including gringding depth, abrasive tangent speed, workpiece rotating speed and axial feeding speed. Simulation and experimental results are in agreement,which shows that this modeling method is feasible in practice, and it can also be used as a guidance for planning automatic polishing process of electric stainless-steel kettles.  相似文献   

Characteristics of electricity consumption of different industry types considering atmospheric condition     

KANG Yeon-Hee  JEON Gyu-yeo  NAM Gyeong-mok  HONG Won-Hwa 《重庆大学学报(英文版)》2011,10(4):168-176

Reducing greenhouse gases (RHG) is going on actively in the international movement. In the field of architecture, RHG is an inevitable work. To establish a plan for RHG, firstly we need to reduce energy consumption. Greenhouse gas generated by energy consumption is the main cause of global warming. For this we should know that how much electricity consumption we use. The research targets of this study are commercial buildings with various businesses. Their electricity consumption was analyzed by business units rather than buildings. Each business was divided into 13 sectors according to industrial classification and electricity consumption was analyzed for each industry. For commercial buildings, the electricity consumption is done by the private sector and construction management is an autonomy system in private instead of an integrated management system. In this study, we classified and analyzed the electricity consumption characteristics according to collected data, analyzed the relationship between the electricity consumption with atmospheric temperature through SPSS, and developed an electricity prediction model.  相似文献   

Torsional effect of space structure in frequent earthquakes     

WANG Xiu-li  JIN En-ping 《重庆大学学报(英文版)》2011,10(2):84-92

Taking a concrete frame supporting space structure as the research object, we systematically studied its lateral-torsion coupling effect of reverse problems in consistent earthquake excitation. Firstly, based on its reverse forms and features, we put forward a mechanical analysis model (flexibility layer model) and a calculation method using the response spectrum method and the weighted average method, and verified their validity and feasibility using case analysis. The result shows that the translation displacement change trend of the space structure is basically the same whether reverse exists in the supporting structure or not, but the supporting structure torsion has an effect on the displacement with a relative increase of 10?.  相似文献   

Rational scale of urban rail transit network based on system dynamics     

LIU You-jun  JING Xiao  GUO Qian-wen 《重庆大学学报(英文版)》2011,10(1):26-34

Optimization design and experimental research for space intelligent structurecapacity, high efficiency and low pollution. Estimating URT network scale is the key to ensure the scientificity and feasibility of its construction. The existing studies on rational scale of URT network have not dealt with the interaction of supply and demand. This paper describes the establishment of a system dynamics model of rational URT network scale determination, considering the interaction between URT construction and city social economic development as well as the dynamic equilibrium of capital supply and traffic demand, and the verification of the model validity by applying it to the case of Wuhan City’s URT construction.  相似文献   

A novel algorithm for Ethernet-passive-optical-network dynamic bandwidth allocation based on threshold     

WANG Xue-shun  YU Shao-hu  DAI Jin-you 《重庆大学学报(英文版)》2011,10(1):45-50

The Ethernet passive optical network (EPON) is the next generation of broad-band network technique. A crucial issue in EPONs is the sharing of uplink bandwidth among optical network units (ONUs). This article provides a novel dynamic bandwidth allocation algorithm, i.e. threshold dynamic bandwidth allocation (TDBA), which is based on adaptive threshold, to increase resource utilization. The algorithm uses ONU data-transmitting rate to adjust optical line terminal (OLT) receiving data threshold from an ONU. Simulation results show that this algorithm can decrease average packet delay and increase network throughput in a 10G EPON system.  相似文献   

信息概念对课堂教学的启示   总被引：1，自引：0，他引：1  

张江鑫  马福萍 《中国现代教育装备》2011,(5):154-156

教学过程是一个师生间的信息传递过程,信息论的原理贯穿了整个教学过程,运用信息论的理论和方法研究教学过程,指导教学实践,对于改变教学思维,改进教学方法和手段,提高教学质量,具有重要而深远的意义。本文应用信息论的观点,从信息概念着手分析课堂教学,重点探讨了消息和信息熵概念对课堂教学的启示。  相似文献   

依托实验教学中心平台 促进第二课堂的发展     

王芳  李平  郭兴启 《中国现代教育装备》2011,(11):70-72

第二课堂作为培养大学生创新能力的重要途径,在高等农业院校日益受到重视。以山东农业大学生命科学学院开展大学生第二课堂实践为例,总结了实验教学中心在开展第二课堂中的作用以及开展大学生第二课堂创新活动的具体举措,并就取得的成效和产生的效果进行了概述。  相似文献   

传热学多层次、创新性实验教学模式的研究     

俞爱辉  冯妍卉  张欣欣  郭美荣  高婷 《中国现代教育装备》2011,(7):115-117

实验教学作为传热学这门课程的重要组成部分,对于加深学生对热量传递过程物理机制的认识,了解其工程应用情况,掌握基本的传热测试方法,提高学生的创新能力和对知识的综合应用能力,起着极其重要的作用。我们从对实验教学内容进行优化整合、实验课件的开发、网络实验教材的建设以及自主研发综合性实验台,到学生自发进行创新性实验,建立起了多层次的创新性实验教学体系。  相似文献   

项目教学法在单片机课程教学中的实践   总被引：1，自引：0，他引：1  

郭文川 《中国现代教育装备》2011,(1):112-114

单片机原理与接口技术是一门理论性、实践性和综合性很强的课程。在分析传统的单片机课程教学存在问题的基础上,介绍了项目教学法的思想。从而详细阐述了笔者如何在单片机课程的理论和实践教学中实施项目教学法。  相似文献   

Mathematica互交功能在物理教学中的应用     

马军 《中国现代教育装备》2011,(21):17-19

数学软件Mathematica是一款功能强大的软件,有着广泛的应用。通过机械波的干涉和光栅衍射的实例,简单介绍了如何利用Mathematica来制作互动应用。以此来加强课堂教学效果,激发学生的兴趣,加深他们的理解。  相似文献