检索结果-南通市图书馆

CApACITATED LOT SIZING AND SCHEDULING prOBLEMS USING HYBrID GA/TS Ap.r.ACHES

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2003年第1期16卷 21-24页

作者： Yang Honghong Wu ZhimingDep.r.ment of automation,shanghai jiaotong university,shanghai 200030, china Dep.r.ment of automation Shanghai Jiaotong University 上海 200030

The capacitated lot sizing and scheduling problem that involves indetermining the production amounts and release dates for several items over a given planning horizonare given to meet dynamic order demand without incurring backloggings. The problem consideringovertime capacity is studied. The mathematical model is presented, and a genetic algorithm (GA)ap.r.ach is developed to solve the problem. The initial solutions are generated after usingheuristic method. Capacity balancing procedure is employed to stipulate the feasibility of thesolutions. In addition, a technique based on Tabu search (TS) is inserted into the genetic algorithmdeal with the scheduled overtime and help the convergence of algorithm. Computational simulation isconducted to test the efficiency of the proposed hybrid ap.r.ach, which turns out to improve boththe solution quality and execution speed.

关键词： production planning Capacitated lot sizing Genetic algorithm Tabusearch Capacity balancing

An Efficient Constrained Model predictive Control Algorithm Based on Ap.r.ximate Computation

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2002年第1期13卷 42-47页

作者： Du xiaoning, xi Yugeng & Li Shaoyuan Institute of automation, shanghai jiaotong university, shanghai 200030, p.r.china Institute of automation. shanghai jiaotong university Shanghai 200030 P. R. China

The on line computational burden related to model predictive control (MpC) of large scale constrained systems hamp.r. its real time applications and limits it to slow dynamic process with moderate number of inputs. To avoid this, an efficient and fast algorithm based on aggregation optimization is proposed in this pap.r. It only optimizes the current control action at time instant k , while other future control sequences in the optimization horizon are ap.r.ximated off line by the linear feedback control sequence, so the on line optimization can be converted into a low dimensional quadratic programming problem. Input constraints can be well handled in this scheme. The comp.r.ble p.r.ormance is achieved with existing standard model predictive control algorithm. Simulation results well demonstrate its effectiveness.

关键词： Model predictive control (MpC) receding horizon control (rHC) Ap.r.ximate computation.

STEADY ENTrANCE FLOW IN A STrAIGHT CIrCULAr pIpE WITH SLOWLY VArYING CrOSS SECTION

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 1999年第2期11卷 1-13页

作者： Liao dong-hua Huang Min（xi’an jiaotong Universidy, xi’an 710049, p. r. china）Kuang Zhen-bang（shanghai jiaotong university, shanghai 200240, p. r. china） xi'an jiaotong Univ Xi'an China

A p.r.ubation method for the steady entrance flow through a convergingdiverging pipe, which can model an arterial stenosis at the initial stage, is presented. Aset of formulas for velocity, pressure and wall shear stress distributions are obtained. results show that the flow patterns of entrance flow are considerably different from those ofdeveloped flow in a converging-diverging pipe: the velocity distribution at the stenosis issmoother, the centerline velocity decreases, and the wall shear stress and pressure gradient increase in the entrance region. The length of entrance flow for the pipe is slighty lower than that for a straight one with constant cross section. The results are checked by thefinite difference method.

关键词： circular pipe stenosis developing flow developed flow p.r.urbation method

Outliers Mining in Time Series Data Sets

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2002年第1期13卷 93-97页

作者： Zheng Binxiang,Du xiuhua & xi Yugeng Institute of automation, shanghai jiaotong university,shanghai 200030,p.r.china Institute of automation Shanghai Jiaotong University Shanghai 200030 P. R. China

In this pap.r. we present a cluster-based algorithm for time series outlier *** use discrete Fourier transformation (DFT) to transform time series from time domain to frequency domain. Time series thus can be mapped as the points in k -dimensional *** these points, a cluster-based algorithm is developed to mine the outliers from these *** algorithm first p.r.itions the input points into disjoint clusters and then prunes the clusters,through judgment that can not contain *** algorithm has been run in the electrical load time series of one steel enterprise and proved to be effective.

关键词： Data mining Time series Outlier mining.

Some notes on betting commitment distance in evidence theory

在线全文

学校读者我要写书评

暂无评论

Science china(Information Sciences) 2012年第3期55卷 558-565页

作者： HAN DeQiang1 , DENG Yong2, HAN ChongZhao1 & YANG Yi3 1MOE KLINNS Lab, SKLMSE Lab, Institute of Integrated automation, School of Electronics and Information Engineering, xi’an jiaotong university, xi’an 710049, china 2School of Electronics and Information Technology, shanghai jiaotong university, shanghai 200240, china 3School of Aerospace, xi’an jiaotong university, xi’an 710049, china MOE KLINNS Lab SKLMSE Lab Institute of Integrated Automation School of Electronics and Information Engineering Xi’an Jiaotong University Xi’an China School of Electronics and Information Technology Shanghai Jiaotong University Shanghai China School of Aerospace Xi’an Jiaotong University Xi’an China

The distance of evidence, which represents the degree of dissimilarity between bodies of evidence, has attracted more and more interest and has found extensive uses in many realms. In this pap.r.some notes on a widely used distance of evidence, i.e., betting commitment distance, are provided, including the arguments on the rationality of its definition, some misuses and some counter-intuitive behaviors of betting commitment distance. Several numerical examples are also provided to supp.r. and verify our arguments.

关键词： pignistic probability evidence theory betting commitment distance distance of evidence

A Constrained Controller Based on State Estimation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of shanghai jiaotong university(Science) 2006年第3期11卷 313-316页

作者：张群亮席裕庚 Dept.of automation Shanghai Jiaotong Univ.Shanghai 200030China

For a class of linear discrete-time systems whose states can not be measured directly, an ap.r.ach to designing the constrained controller based on state estimation was proposed. By constructing a prop.r.linear state observer for the controlled system, the sufficient condition to convergence of the state error was derived. Under a simple assumption on the initial state error, we presented an LMI-based method to design the constrained feedback gain and the observer gain. An example was used to illustrate our results.

关键词： state estimation constraint invariant set stability

planar Motion Tracking with an Uncalibrated robot/Vision System

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 1998年第4期9卷 45-50页

作者： Su Jianbo & xi Yngeng(Institute of automation, shanghai jiaotong university, 200030, p. r. china)Tang Shantong(Beijing Institute of Electronics System Engineering, 100854, p. r. china) (This project was supp.r.ed by the National Natural Science Foundation

This pap.r.discusses the coordination process for a robot gripp.r.to ap.r.ach a movingobject with feedback from an uncalibrated visual system. The dynamic of the whole system, includingtarget's random motion and the gripp.r.s tracking motion, is bounded to a 2-D working plane. Acamera, whose relations with the robot system and the 2-D working plane are unknown to the robotcontroller, is fixed aside to observe the object and gripp.r.positions continually. Thus the movementsof the robot gripp.r.can be decided on the positions of the object observed in each visual samplingmoment. The coordination of the vision and robot system is to be shown independently from therelations between the robot and the vision system, which should always be calibrated a prior forthe control of traditional robot/vision coordination system. Simulations are provided to show theprop.r.y of the proposed method.

关键词： robot Vision Hand/Eye coordination Uncalibration

在线全文

学校读者我要写书评

暂无评论

基于模糊约束模拟的广义预测控制器参数调整

上海交通大学学报 2001年第11期35卷 1631-1634,1650页

作者：李少远席裕庚上海交通大学自动化研究所上海200030

针对广义预测控制算法在控制时域中求得的 M个控制量 ,利用系统预测控制量的信息 ,通过模糊模拟技术对系统的约束进行检验 ,不断修正目标函数中控制量的加权系数λ,增强了系统的鲁棒性 ,并满足系统的约束 .

关键词：预测控制模糊模拟鲁棒性系统约束参数调整控制量加权系数

Study of A New Method for Vision Based robot Target-Tracking problem

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2001年第2期7卷 54-57页

作者：董胜龙 Fan Changhong chen weidong xi Yugeng automation research Inctitute Shanghai Jiaotong University

Focused on several problems during robot target tracking, and proposed a new kind of scheme and algorithm for it. The hybrid systematic structure reduces the control complexity and guarantees the tracking effectiveness as well as the control stability. The convergence and the feasibility of the algorithm are analyzed and proofed thoroughly. An on-line updating method for navigation coefficient is presented. Finally, the control scheme and proposed algorithm is applied to the real robotic system. The simulation and exp.r.mental results show its effectiveness.

关键词： prop.r.ional navigation robot tracking LOS convergent tracking