International Journal of Modeling and Optimization最新文献

{"title":"Evaluation of Fatigue Reduction during Crop Harvesting Using a Power Assist Suit","authors":"Toshitake Araie, Ikeda Tomozumi, A. Kakimoto, S. Toyama","doi":"10.7763/ijmo.2019.v9.733","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.733","url":null,"abstract":"","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127349824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Plantar Pressure and Contact Forces Changes in Locomotion of People with Low Vision","authors":"M. Baritz","doi":"10.7763/ijmo.2019.v9.732","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.732","url":null,"abstract":"","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"29 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114033413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Compact and Lightweight Stand-up Powered Wheelchair—Fall Risk Analysis When at Rest and Decelerating","authors":"T. Ikeda, Toshitake Araie, A. Kakimoto, Koji Takahashi","doi":"10.7763/ijmo.2019.v9.731","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.731","url":null,"abstract":"When unassisted walking is difficult, a wheelchair with a stand-up function enables a standing position as well as a sitting position for work and improved convenience. However, in the standing position, the center of gravity is high, and to prevent falling it is common to shorten the long wheelbase of the wheelchair, or to lower its center of gravity. It is also desirable to reduce the size and weight of the wheelchair for space and portability reasons. Therefore, we aim to reduce the size and weight of electric wheelchairs that can move with a stable high attitude by providing a fall-prevention control function. This study reports on the appearance and the dimensions of a prototype stand-up powered wheelchair and the results of a fall risk analysis when at rest and decelerating.","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114371221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flight Envelope Expansion Via Piezoelectric Actuation Receptance Method and Time-delayed Feedback Control","authors":"D. Enciu, Bucharest Romania Informatics","doi":"10.7763/ijmo.2019.v9.729","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.729","url":null,"abstract":"In aerodynamics, the phenomenon of flutter suppression represents a great challenge. Since it is a complex and difficult process, it requires an innovative approach. In this paper, a V-shaped piezoelectric actuator whose role is to widen the aircraft flight envelope by raising the speed limit at which flutter occurs is presented. The demonstrator is in fact an intelligent model of wing, which is itself a control system, with sensors, piezo actuator and an implemented control law. The control law is obtained through the receptance method of eigenvalues assignment using the measured transfer function. The content of the paper refers to technical solutions for wing model design and to experimental results in subsonic wind tunnel. Another contribution of the paper concern the consideration of a time-delayed feedback control.","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"79 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130980712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of Mature Water Flooding Performance and Optimization by Using Capacitance Resistive Model and Fractional Flow Model by Layer","authors":"F. Gamarra, Manuela Saénz Caba Argentina Sinopec Argentina E P, Néstor E Ramos, Ignacio Borsani","doi":"10.7763/ijmo.2019.v9.727","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.727","url":null,"abstract":"Waterflooding is the oldest and most extended method to enhance recovery from oil reservoirs in primary production with low natural energy in the Golfo San Jorge Basin, Argentina. Water injection has proven to be an effective method to enhance recovery from oil reservoirs for project CM-123-A at Cañadón Minerales field, Golfo San Jorge Basin. Defining the optimized injection rates and injection patterns, which depend on the geological structure of the reservoir, is an essential operational and economical decision for reservoir management. In this paper, the capacitance resistive model (CRM), which takes into account implicitly the geological and reservoir parameters, is used to find inter-well connectivity by layer (independent reservoir), optimize injection rates with the complement of net sand maps and petro-physical and production test data, and check the consistency of the solutions with all the available data to support the decisions. The CRM receives the injection rates variations as input signal, from the different reservoirs, whereas the producer responses determine the injector/producer pair connectivity quantitatively. The different runs of the CRM can be used to detect how some abrupt changes in the artificial lift of the producers affect the connectivity and propose some improvements. Also, this model is used to predict gross production for individual reservoir, together with a multilayer FFM (fractional flow model) can be estimated the oil production for each individual reservoir, identify the potential from different reservoirs and improvements in the injection rates to optimize the oil production. The results reveal that the CRM has the capability to match the production history to calibrate the dynamical effective parameters and with this characterization optimize the injection rates of the different wells injectors and reservoirs, during the immiscible flooding, understand water injection movement, and as accessory the joint validation of the net sand maps. The CRM was able to detect inter-well connectivity for producers connected not only at the first line but also at the second line, with a clear response in the field.","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116857530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Simple Model for Quantitative Prediction of Future Climate Change","authors":"Heming Huang, Xinmeng Li, Xiaoyu Tian, Andrew Zhang","doi":"10.7763/ijmo.2019.v9.726","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.726","url":null,"abstract":"","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128095586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nonlinear Model for Micro-Launcher Attitude Control","authors":"Teodor-Viorel Chelaru","doi":"10.7763/ijmo.2019.v9.728","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.728","url":null,"abstract":"The paper presents aspects regarding six degree of freedom (6DOF) model used for attitude control of the three-stage micro-launcher (ML) with a payload of up to 50 kg. This work uses two separate attitude control models dedicated for different flight phases. In the ascending phases, we will control the attitude angles related to the start frame, and in injection phases, we will control the attitude angles related to the geographical frame. The results analyzed will be the flight parameters in longitudinal, in lateral, and in roll movement. Using this model, the attitude control of the launcher can be evaluated. The novelty of the paper consists in alternative attitude angles used for control and in description of guidance signal.","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125132879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biokinematic Control Strategy for Rehabilitation Exoskeleton Based on User Intention","authors":"Jinan Charafeddine, S. Chevallier, S. Alfayad, M. Khalil, Dider Pradon","doi":"10.7763/ijmo.2019.v9.730","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.730","url":null,"abstract":"Rehabilitation exoskeletons require a control interface for the direct transfer of mechanical power and exchange of information in order to assist the patient in his/her movements. By using co-contraction indexes (CCI), it is possible to accurately characterize human movement and joint stability. But when dealing with human movement disorders, no existing index allows to achieve neuro-motor control with bio-kinematic sensors. Thus, we propose a neuro-motor interactive method for lower-body exoskeleton control. A novel dynamic index called neuro-motor index (NMI) is introduced to estimate the relation between muscular co-contraction derived from electromyography signals (EMG) and joint angles. To estimate the correlation in the state space and enhance the precision of the NMI, we describe an estimation method relying on a two-way analysis of canonical correlation (CCA). A thorough assessment is presented, by conducting two studies on control subjects and on patients with abnormal gait in a medical environment. i) An offline study on control patients showed that NMI captures the complex variation induced by changing walking speed more accurately than CCI, ii) an online study, applied on successive gait cycles of patients with abnormal walk indicates that the existing CCI have a low accuracy related with joint angles while it is significantly higher with NMI.","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114148273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of a Robot Used for a Solid Waste Selection System","authors":"C. Boanta, C. Brisan","doi":"10.7763/ijmo.2019.v9.737","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.737","url":null,"abstract":"","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"53 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123125311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discrete Model for the Movement of Industrial Manipulator Used in Hot Rolling Process","authors":"I. Clitan, V. Muresan, M. Abrudean, V. Sita","doi":"10.7763/ijmo.2019.v9.734","DOIUrl":"https://doi.org/10.7763/ijmo.2019.v9.734","url":null,"abstract":"","PeriodicalId":134487,"journal":{"name":"International Journal of Modeling and Optimization","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114501825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}