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Quantitative Evaluation Research on Uncertainty Factors in Production Scheduling of Manufacturing Enterprises

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武汉理工大学学报 2006年第S2期28卷 484-489页

作者： wu Bo SHI Guoxin DING Yufeng JIANG Zhengfeng (school of mechanical and electronic engineering,wuhan university of technology,Wnhan 430070,china school of mechanical and electronic engineering WuHan University of TechnologyWuhan 430070China

Shop scheduling problem is core part and research hot in modern manufacture system,it has important meaning for decreasing operating costs,shortening production period and so *** on shop scheduling problems,this paper mainly dis- cuss and classify uncertainty factors of the shop scheduling,Meanwhile set up corresponding reliability evaluation model according to some uncertainty factors,and so it can better direct shop scheduling.

关键词： shop scheduling reliability uncertainty factors

The Rejection Rate and Rework Rate Calculation Model in the mechanical Spare Part Production

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The Rejection Rate and Rework Rate Calculation Model in the ...

Sintering characteristics and microstructure of WC-Co-VC/Cr_3C_2 ultrafine cemented carbides

2010 International Conference on Computer,Mechatronics, Control and electronic engineering (CMCE 2010)

作者： wu Bo china Ding Yu-feng school of mechanical and electronic engineering wuhan university of technology wuhan, china Zhou Wen-qing school of mechanical and electronic engineering wuhan university of technology, P.R.china wuhan china

In this paper, according to the mechanical spare part product processing of manufacture precision request and the processor's technical level a common mechanical parts production process rejection rate and rework rate calculation model and simulation analysis model is built, and the rejection rate and rework rate calculation examples are given at last.

关键词： mechanical spare part, Rejection rate, Rework rate, Calculation model

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Rare Metals 2009年第5期28卷 482-486页

作者： LEI Yiwen wu Enxi school of mechanical and electronic engineering Tianjin Polytechnic University Tianjin 300160 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China

The sintering characteristics, microstructure, and mechanical properties of ultrafine WC-12%Co-0.2%VC/0.5%Cr3C2 cemented carbides were investigated. Dilatometric and differential thermal analyses （DTA） indicate that the compacts start to shrink at 600°C, the shrinkage rate peak is at 1190°C, and the liquid formation temperature is lower than the W-C-Co eutectic temperature （1330°C）. Microstructure analysis results show that the cemented carbides with fine and homogeneous microstructure were obtained when sintered at 1430°C. Continuous and discontinuous grain growth was suppressed due to the synergistic action of VC/Cr3C2. The transverse rupture strength （TRS） of the samples reaches 4286 MPa, with the hardness HRA 92.1. The fine and homogeneous microstructure, alloy strengthening, and different phase constitutions of binder in the cemented carbides result in high hardness and TRS. Continuous and discontinuous grain growth was observed in the cemented carbide sintered at 1450°C, which results in significant decreases of hardness and TRS. It indicates that VC/Cr3C2 additions in the cemented carbides can only suppress the grain growth at a certain temperature.

关键词： cemented carbides sintering characteristic grain growth microstructure mechanical properties

Digital Design of Virtual Prototype based on Multidisciplinary Design Optimization

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武汉理工大学学报 2006年第S2期28卷 728-733页

作者： wu Baogui~1 HUANG Hongzhong~2 TAO Ye~1 1.school of mechanical engineering,Dalian university of technology,Dalian 116023,china, 2.school of Mechatronics engineering,university of electronic Science and technology of china,Chengdu 610054,china school of mechanical engineering Dalian University of TechnologyDalian 116023China school of Mechatronics engineering University of Electronic Science and Technology of ChinaChengdu 610054China

In order to obtain digital design of complex mechanical product as optimal as possible in an efficient way,multi- discipline integrated design method is proposed,which integrates multidisciplinary design optimization (MDO) into digital design process to design virtual prototype (VP) *** combining MDO and multi-body system dynamics,MDO integra- tion platform,which takes VP as the core,is *** automated MDO design of VP is realized and changes of mechani- cal design project can be expressed intuitively during MDO design *** proposed approach is also demonstrated by using inte- grated analyzing flow of vehicle engineering *** result shows that the method not only can feasibly realize the MDO of VP, but also can solve the optimization problem of vehicle multi-body system dynamic *** can be adopted to the digital de- sign of other complex system.

关键词： complex mechanical product virtual prototype digital design multidiscipline design optimization integration platform vehicle design

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一种精确海缆铠装钢丝几何建模法探讨

武汉理工大学学报 2009年第15期31卷 80-83页

作者：周学军王瑛剑伍先俊李兢海军工程大学电子工程学院武汉430033 武汉理工大学机电工程学院武汉430070

海缆钢丝铠装缠绕呈复杂的空间形状,正确建立海缆铠装三维模型是对其进行有限元分析的必要前续步骤。针对在建立有限元模型中的一些错误作法,文章在三维空间几何变换和数学推导的基础上,研究发现铠装钢丝在空间缠绕时在海缆横截面呈非... 详细信息

海缆钢丝铠装缠绕呈复杂的空间形状,正确建立海缆铠装三维模型是对其进行有限元分析的必要前续步骤。针对在建立有限元模型中的一些错误作法,文章在三维空间几何变换和数学推导的基础上,研究发现铠装钢丝在空间缠绕时在海缆横截面呈非椭圆形状,给出缠绕钢丝横截面和轴剖面的正确数学表达式,同时给出了在指定缠绕半径、钢丝半径下最多缠绕铠装钢丝根数的计算方法,给出了在指定缠绕半径、铠装钢丝半径和铠装钢丝根数条件下的捻角计算方法。

关键词：海缆建模有限元

EEG Characters Research to Different Personality People

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EEG Characters Research to Different Personality People

A Deep Learning-Enabled Skin-Inspired Pressure Sensor for Complicated Recognition Tasks with Ultralong Life

2010 3rd International Conference on Future BioMedical Information engineering (FBIE 2010)

作者： Junqiang Peng school of mechanical and electronic engineering Tianjin Polytechnic university Tianjin china Pingdong wu school of mechanical and Vehicular engineering Beijing Institute of technology Beijing china

Purpose: To find the relationships between different personality people and their EEG. Method and Procedures: Using the psychology test method of Uchida- Kraepelin psycho-diagnostic test （UK Test） to sort the experimenters into different groups according to three aspects: startup capacity, excitement capacity and changeable capacity. At the same time, the experimenters’ EEG was measured. By analyzing the frequency and energy of EEG, the EEG characters of different personality people were found. Results and Conclusions: （1） EEG character of startup capacity is the amount of β-wave energy in the first several minutes of the experiment. （2） EEG character of excitement capacity is the amount and developing trend of α-wave energy in the experiment. （3） EEG character of changeable capacity is the fluctuation of β-wave energy. The results of the research can be used to increase the precision and adaptability of the BCI system.

关键词： Personality Electroencephalogram (EEG) UK Test

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Research 2024年第1期2023卷 443-454页

作者： Yingxi Xie Xiaohua wu Xiangbao Huang Qinghua Liang Shiping Deng Zeji wu Yunpeng Yao Longsheng Lu school of mechanical&Automotive engineering South China University of TechnologyGuangzhouChina

Flexible full-textile pressure sensor is able to integrate with clothing directly,which has drawn extensive attention from scholars *** the realization of flexible full-textile pressure sensor with high sensitivity,wide detection range,and long working life remains *** recognition tasks necessitate intricate sensor arrays that require extensive data processing and are susceptible to *** human skin is capable of interpreting tactile signals,such as sliding,by encoding pressure changes and performing complex perceptual *** by the skin,we have developed a simple dip-and-dry approach to fabricate a full-textile pressure sensor with signal transmission layers,protective layers,and sensing *** sensor achieves high sensitivity(2.16 kPa^(−1)),ultrawide detection range(0 to 155.485 kPa),impressive mechanical stability of 1 million loading/unloading cycles without fatigue,and low material *** signal transmission layers that collect local signals enable real-world complicated task recognition through one single *** developed an artificial Internet of Things system utilizing a single sensor,which successfully achieved high accuracy in 4 tasks,including handwriting digit recognition and human activity *** results demonstrate that skin-inspired full-textile sensor paves a promising route toward the development of electronic textiles with important potential in real-world applications,including human–machine interaction and human activity detection.

关键词： Deep Skin utilizing

Dynamic Characteristics of Roadheader Auto Cutting and Profiling Control System

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Dynamic Characteristics of Roadheader Auto Cutting and Profi...

Topology optimization of AISI 4140 steel with surface texture filled by multi-solid lubricants for enhancing tribological properties

2011 World Congress on engineering and technology(CET 2011)

作者： TIAN Jie wu Miao school of mechanical electronic and Information engineering china university of Mining and technology (Beijing) Beijing 100083 china

In order to guarantee the reliability of roadheader auto cutting and profiling control system, the paper conducts the research on dynamic characteristics of roadheader auto cutting and profiling control system, which has been overlooked in the research area of roadheader’s dynamic characteristics. According to the principle of roadheader auto cutting and profiling control system, the open-loop transfer function of the control system is obtained firstly through the analysis of each component link’s transfer function. The control system is proved to be a type Ⅰ system. Then, the dynamic characteristics of the cutting head horizontal movement control system are analyzed. Meanwhile, the process of control system’s response to step function is simulated based on Simulink and the pole-zero distribution map and Bode diagram are obtained separately. The simulation result verifies the system stability and proves that the control system fulfills the requirement of response speed. The research of the paper has profound meaning to guarantee the cutting face quality and the control accuracy.

关键词： roadheader auto cutting and profiling control dynamic characteristics

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Friction 2024年第9期12卷 2033-2051页

作者： Qipeng HUANG Chaohua wu Xiaoliang SHI Kaipeng ZHANG school of mechanical and electronic engineering Wuhan University of TechnologyWuhan 430070China school of Transportation and Logistics engineering Wuhan University of TechnologyWuhan 430063China

Wind power gears will be excessively worn due to lubrication failure during ***,the tribological properties of rubbing pairs are improved by filling solid lubricants into surface *** texture design,three types of topological textures(Circle(C),Hexagon(H),and Circle/Hexagon(CH))were obtained by cell topology optimization,and then three cases with 20%,30%,and 40%density were designed for each ***,SnAgCu and TiC were deposited in texture of AISI 4140 steel(AS)to obtain 9 kinds of self-lubricating *** them,AS with 30%CH density(AS-CH30)exhibits excellent mechanical and tribological *** with AS-C and AS-H,the maximum equivalent stress of AS-CH was decreased by 10.86%and 5.37%,*** coefficient and wear rate of AS-CH30 were 79.68%and 78%lower than those of *** excellent tribological performances of AS-CH30 can be attributed to the synergistic effect of topological surface and solid *** surface can not only reduce fluctuation of equivalent stress,but also promote the stored lubricants to be easily transferred at the contact interface to form a 200 nm lubricating film containing solid lubricants(mainly),oxides and wear debris.

关键词： topological texture nano-TiC self-lubricating solid lubrication