检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

铝带铸轧凝固过程中的枝晶生长模拟

特种铸造及有色合金 2008年第10期28卷 757-759页

作者：刘晓波彭立志江西理工大学机电工程学院

采用元胞自动机方法(Cellular automation Method)模拟铝带铸轧过程中晶粒的生长,模拟过程中用简化的二元合金模拟了过冷熔体中枝晶的生长,且过冷熔体中枝晶的生长模型采用LGK模型。在枝晶生长的基础上模拟了铝带在铸轧过程中冷却及铸... 详细信息

采用元胞自动机方法(Cellular automation Method)模拟铝带铸轧过程中晶粒的生长,模拟过程中用简化的二元合金模拟了过冷熔体中枝晶的生长,且过冷熔体中枝晶的生长模型采用LGK模型。在枝晶生长的基础上模拟了铝带在铸轧过程中冷却及铸轧速度引发的过冷度对晶粒生长的影响。结果表明,在形核率一定的情况下,过冷度越大,晶粒越大。

关键词：元胞自动机晶粒铝带过冷度

Preparation of Ag nanoparticles colloid by pulsed laser ablation in distilled water

在线全文

学校读者我要写书评

暂无评论

Preparation of Ag nanoparticles colloid by pulsed laser abla...

Fifth International Conference on Surface engineering

作者： B.Xu1 R.G.Song1 P.H.Tang1 J.Wang1 G.Z.Chai1 Y.Z.Zhang2 Z.Z.Ye2 1 The MOE Key Laboratory of mechanical Manufacture and automation zhejiang university of technology hangzhou 3.001. china 2 State Key Laboratory of Silicon Materials zhejiang university hangzhou 310027 china

The Ag nanoparticles colloid was prepared by pulsed laser ablation for different time in 10 ml distilled water without any surface active agent,and it was analysed by means of UV-visible spectrophotometer and transmission electron microscopy（TEM）.The results showed that the ablation efficiency and absorbance increased fast and shift to higher energies,the average diameter of Ag colloidal nanoparticles increased,and the size distribution narrowed with increasing the ablation time from 5 to 10 *** the ablation efficiency and absorbance as well as the average diameter increased slowly,and the size distribution broaden from 10 to 20 ***,the ablation efficiency and absorbance increased,the average diameter decreased and the size distribution narrowed again from 20 to 25 *** the basis of experimental results,laser ablation process was considered to have three stages:at the beginning,the initial nanoparticles were fragmented by pulsed laser ablation from the surface of Ag target;then the self-absorption of the initial nanoparticles;after the laser was off,the final nanoparticles were generated by rapid solidification from the melt with the effects of the surrounding *** the same time,it was explained that the effects of laser ablation time on the Ag nanoparticles colloid in terms of fragmentation and growth of colloidal nanoparticles by self-absorption of laser pulses,and the minimum average diameter was produced when the rate of fragmentation was equal to that of the ***,it was also discussed that the relationship between the colloidal concentration and stability of the Ag nanoparticles in the solutions,and the importance of preventing the Ag nanoparticles colloid agglomeration.

关键词： Laser ablation Ag Nanoparticles Colloid

在线全文

cnki会议

学校读者我要写书评

暂无评论

精密机械系统综合实验装置的研制

实验科学与技术 2011年第5期9卷 65-67,85页

作者：张建新陈本永罗剑波浙江理工大学机械与自动控制学院杭州310013

针对高校机械类专业精密机械系统相关课程的实验教学需要,以"直线位移精密工作台"为基础,研制了精密机械系统综合实验装置。该综合实验装置不仅可以完成精密传动、精密运动测量和电机驱动等单独实验,也可以完成体现光机电一体化综合知... 详细信息

针对高校机械类专业精密机械系统相关课程的实验教学需要,以"直线位移精密工作台"为基础,研制了精密机械系统综合实验装置。该综合实验装置不仅可以完成精密传动、精密运动测量和电机驱动等单独实验,也可以完成体现光机电一体化综合知识的精密运动控制实验。该实验平台采用CPLD(复杂可编程逻辑器件)光栅位移测量装置以及计算机控制系统,可以让学生在已有实验平台上进行主动设计,完成精密运动测量和运动控制实验,从而培养学生的动手能力和创新能力。

关键词：精密机械实验教学运动测量 CPLD器件

Research for Humanity technology and Physiology Influence Factors in Product Styling Design

在线全文

学校读者我要写书评

暂无评论

Research for Humanity Technology and Physiology Influence Fa...

第二十九届中国控制会议

作者： XIE Zhibin 1,SHI Lei 1,2 1.faculty of mechanical engineering and Mechanics,Ningbo university,Ningbo 315211,P.R.china2.faculty of Art Design,Beijing Institute of technology,Beijing 10086,P.R.china

This paper uses method of multi-subject synthetic *** of limited conditions to product styling design were *** discovered product had made lots of relationships of observation,using,sentimental exchange,research,collection with *** also made relationships with politic social environment,economical environment,market environment,natural resource environment,technical environment,cultural *** styling design is based on human vision rule and product intrinsic special function,observes principle of vision and psychological of gestalt and Berlyne rules,limited by technical manufacture level,facing request of ergonomics and product semantics,examined by fashion symbol in business environment,needs cultural connotation to promote product value,and needs product identity design to carry on standard operation to product system.

关键词： Product Styling Design Vision rule Gestalt rules BErlyne Rules

Virtual Reality based Intelligent Vehicle Modeling in Driving SIMULATION System

在线全文

cnki会议

学校读者我要写书评

暂无评论

Virtual Reality based Intelligent Vehicle Modeling in Drivin...

The 7th International Conference on Computer-Aided Industrial Design and Conceptual Design (CAID&CD’2006)

作者： He Han-wu deputy dean of faculty of Electromechanical engineering GuangDong university of technology Lu Yong-ming graduate student of faculty of Electromechanical engineering GuangDong university of technology Lou Yan faculty of Electromechanical engineering GuangDong university of technology

The driving intelligence of the virtual intelligent vehicle in the driving simulation system is crucial to the system’s sense of reality and the reliability of the experiment. This paper focuses on the features and functionality of the virtual intelligent vehicle in driving simulation system. Intelligent vehicle should first distinguish the roadway network in order to drive correctly along a certain path. Then the intelligent vehicle should be able to obtain the traffic information efficiently and to execute the decision-making process to response to the changing driving environment. This paper describes a method to construct the virtual intelligent vehicle using database technology and the collision detection algorithm. The experiment result illustrates that the virtual intelligent vehicles in virtual traffic environment can simulate the human vision genuinely and exhibit human-like driving behavior. The virtual intelligent vehicle can still keep the correctness and the efficiency in a comparatively complex traffic environment, also the stability of the system is satisfied.

关键词： intelligent vehicle driving simulation virtual reality

Study of HTHP Rheometer Pressure Control Based on Fuzzy Self-tuning PID Controller

在线全文

cnki会议

学校读者我要写书评

暂无评论

Study of HTHP Rheometer Pressure Control Based on Fuzzy Self...

2011 IEEE International Conference on Computer science and automation engineering(CSAE 2011)

作者： Jianhua, Rao/ per 1st Dongmei,Zhou/per 2 nd, Xiaokang, Liu/ per 3rd faculty of mechanical and electronic information china university of Geosciences Wuhan china

The pressure system of the HTHP rheometer is a complex and non-linear system, and it is hard to adjust the parameters with the PID control. An intelligent fuzzy self-tuning PID controller is developed to realize automatic on-line tuning of PID parameters to enhance the control accuracy for pressure control system. The simulation results show that the fuzzy control system has not only a quick speed of response, but also a good robustness.

关键词： fuzzy PID control self-tuning high pressure SVPWM Simulink

论系统化行政学理论指导下高等学校突发事件处理

在线全文

cnki会议

学校读者我要写书评

暂无评论

沈阳农业大学学报（社会科学版） 2011年第5期13卷 557-559页

作者：刘文婷黄发友福州大学外国语学院福建福州350108 福州大学机械工程自动化学院福建福州350108

科学、合理、迅速、有利处理突发事件,是当前摆在高等学校面前的重要现实课题。美国行政学家怀特的系统化行政学理论对高等学校处理突发事件具有一定的借鉴作用。当前高等学校突发事件处理存在相关法律法规缺位、处理机构结构松散、行... 详细信息

科学、合理、迅速、有利处理突发事件,是当前摆在高等学校面前的重要现实课题。美国行政学家怀特的系统化行政学理论对高等学校处理突发事件具有一定的借鉴作用。当前高等学校突发事件处理存在相关法律法规缺位、处理机构结构松散、行政协调机制薄弱、人力资源储备欠缺以及行政监督反馈缺乏等问题,必须从健全法律法规、设立处理机构、建立协调机制、配置专业人员、进行行政反馈和总结经验教训等来构建高等学校突发事件处理的行政管理体系以有效应对突发事件。

关键词：高等学校突发事件系统化行政学理论行政管理体系

Dynamic Behaviour Modelling and Simulation of the Chain Transmission System for an Armoured Face Conveyor

在线全文

学校读者我要写书评

暂无评论

Dynamic Behaviour Modelling and Simulation of the Chain Tran...

E-Business·Creative Design·Manufacturing——2009 IEEE 10th International Conference on Computer-Aided Industrial Design & Conceptual Design（CAID&CD’2009）

作者： Baiyan He 1 2 Guoping Li 2 Hui Shi 1 Hang Li 3 1.School of mechanical engineering Tianjin university Tianjin 300072 china 2.R&D Center Zhangjiakou Coal Mining Machinery Co. Ltd Zhangjiakou Hebei Province 075025 china 3.School of Electronic Information&automation Tianjin university of science&technology Tianjin 300222 china

Armoured face conveyor is a key component of the comprehensive mechanized coal mining equipments which has the characteristics of large size and heavy *** chain transmission system is adopted to transport material from the coal *** dimensional geometry model of the chain transmission system is built by Solidworks software including the chains,sprockets and *** on the geometry model,the contact characteristics of two chains are studied by finite element ***,the multibody model of chain transmission system is investigated in order to get the knowledge of the dynamic and contact behavior under working *** contact stress field is given which is useful for the design of the *** multibody dynamic results such as the chain tension,vibration can be used in the system design and test of the armored face conveyor.

关键词： Armoured Face Conveyor Chain Transmission Dynamics Finite Element Method

Research on the Industrial Design engineering of Packaging Machines

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research on the Industrial Design Engineering of Packaging M...

E-Business·Creative Design·Manufacturing——2009 IEEE 10th International Conference on Computer-Aided Industrial Design & Conceptual Design（CAID&CD’2009）

作者： 1Leming Fan 2Yang Liu 1Industrial Design Department School of Mechatronics engineering and automation Shanghai university P.R.china 200072 2College of Design Art Shenyang Institute of Aeronautical engineering P.R.china

Although the quality of electromechanical products of china such as packaging machines reaches a high level,it still lags in the field of industrial *** paper demonstrates how to carry out the industrial design of this kind of products with the case of automatic feeder thermal transfer printer and floor-type labeling machine which we briefly introduce for the limitation of *** the basis of such practice,in the end of paper we conclude the method of industrial design in such electromechanical products.

关键词： Industrial Design Packaging Machine Product Identity