被引排行
Research on the Supplier Selection of SCM
WANG Han, HUANG Ming (Dept. of Management, Dalian Railway Institute, Dalian 116028, China; Dept. of Electric and Information Engineering, Dalian Railway Institute, Dalian 116028).The detailed introductions to the Supply Chain and the administration on it have held out that the supplier selection was the basic step to the proper work of the Supply Chain. Then supplier Selection have been applied to the real project based on the analysis of the standards of the supplier selection, cursor system and the method to select. At last, the effections and the research orientation were generalized.
Status and Development of RV Reduce
HE Weidong;SHAN Lijun;School of Mechanical Engineering,Dalian Jiaotong University;From the aspects of theory and experience,the status of RV development and the key technologies is reviewed,and the development in the future is presented. The theoretical research content of the RV reducer is summarized from tooth profile optimization,transmission accuracy,return difference,and torsional stiffness.It also make summing on the experimental research content of RV reducer on the aspects of processing technic and engine performances. Future work on the RV reducer is prospected.
Mode Setting-Up of Public Traffic Line Network
Wang Zhidong (Dept. of Locomotive and Railway Car)Discusses the urban traffic line network optimization principle、objective and constraints, presents mathematecal expression for distinct optimum objects function form and corresponding constraints. Finally, varied objectives and unlinear programming model of public traffic line network optimization is produced.
The Study on High-accuracy RV Drive Used in Robot
Li Lixing; He Weidong; Wang Xiuqi(Dalian Railway Institute)Li Chengbo;Wu Ziwei; Fang Rong(Qinchuan Machine Tool Group Corp. )RV (Rot Vector) ed in robot is a new drip developed from aroid drive, it has a serial of advantageS, saal as a wide fange of trans~ion ratio, compact structure, small volume. high cinematic accuracy, highrigidity, little baCklash and high transition efl'KicnCy etc. It is the bet seleCtion of high--a~ drive ed inrobot at pat, so it is paid attenhon to at home and abroadAt the same time, it is p~ as key ~fogyin the ninth five--air plan of meChedtal industry of our counts. Gins amount of its operating prindple ands~ assign, emphaticly ~ the main principle of wide ~baton ratiO, high rigidity, high kinernatic~, op tianSrhaion effidenCy, little bactheh, small rolurne and also ~es the Perfonnance act nsultor saxnnIe macaos.
Ascertainment of Index Ievel and Coefficient Smooth
ZHANG De-nan,ZHANG Xin-yan (Dept. of Management, Dalian Railway Institute, Dalian 116028, China)This paper proposes three methods of index level and smooth coefficient deterruination which is important for the forecast accuracy, and can solve the problem of the application limitation of index level and coefficient smooth.
The General Equations for the Teeth Profile of Cycloidal Gear
Li Lixing (Dept.of Mech.Eng.) Hong Chunhe (Northeast Inst.of Techn.)According to the practical requirements,presents the general equations of cycloidal gear teeth profile which fit all kinds of modifications of teech profile practically.
Study of Suspension Parameter of high Speed Passenger Car Bogies
CHI Mao-ru,ZHANG Wei-hua,ZENG jing,DAI Huanyun,WU Ping-bo(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)In order to study the influence of suspension parameter on running security and passenger cosiness of high speed passenger car and provide theoretical basis for the choice of suspension parameters about high speed passenger car bogies,the influence of primary and secondary suspension parameters on dynamic performance of high speed passenger car is analyzed in time-domain,and the influence of secondary suspension parameters on vibration mode of car body is analyzed in frequency-domain.Analysis result shows that the reasonable setting of primary longitudinal and lateral stiffness and damping values of yaw dampers can increase the critical velocity of bogies,the decrease of secondary lateral stiffness and the proper increase of secondary lateral damping value can improve the lateral comfort of high speed passenger car,and the primary and secondary vertical damping values should not be set too high in order to improve the vertical comfort of high speed passenger car.
The Process, Properties and Applications of Metallic Form
WANG De-qing, SHI Zi-yuan (Dept. of Material Science & Engineering, Dalian Railway Institute, Dalian, Liaoning 116028)Processes of metallic form, such as casting, metallic deposition, powder metallurgy and sputter deposi- tion, have been reviewed, while the technical difficulties in processes have been briefly analyzed. The properties pertinent to the structure of the metallic form are described fully.The wide range of usages of metal- lic from is also listed.
A Model Development of Public Bicycle Rental Demand Based on Multinomial Logit
WU Yao1,CHEN Hong1,BAO Na2,FENG Wei1(1.School of Highway,Chang'an University,Xi′an 710064,China;2.Weifang Huayuan Highway Consultants Co.,Ltd,Weifang 261031,China)Based on a public bicycle travel method,the utility functions of different models were established,and the sharing ratio of public bicycles was calculated using a multinomial logit model.Combining the sharing ratio and the residents travel OD matrix,the public bicycle rental demand was obtained,and the total size of the public bicycle and the parking pile were determined by considering the bicycle turnovers.Take a new city area of Xi′an,the total number of public bicycles and the parking piles are forecast by the proposed model,which proves that the model is simple,efficient and feasible.
Prediction of Longitudinal Dynamic Coupler Force of 20000 Ton Connected Train
WEI Wei,ZHAO Lian-gang(Advanced Technology of Transportation Vehicle Key Laboratony,Dalian Jiaotong University,Dalian 116028,China)A new combined model of longitudinal dynamic and air brake system for heavy haul train is established.The brake system performance of service application and longitudinal coupler force is simulated for 1+2+1 connected train.From the view of coupler force,the train can be considered as two parts divided from the middle of the train,and the two parts have similar coupler force characteristics.The front part is suffering compression coupler force,while the last part tension force.The maximum compression and tension forces occur at about 1/8 and 7/8 of the train length.When the brake initial time of middle and last locomotive lags the first locomotive brake initial time,the compression coupler force increases,and the maximum tension force change little,and the number of vehicles which have compression force increases.The lager the gap between two couplers is,the bigger the coupler force,and the force will decreases with the initial velocity increases.