International Journal for Engineering Modelling最新文献_第7页

The strain softening model of rock damage under compression and tension 岩石压缩和拉伸损伤的应变软化模型

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/engmod.2018.3.ri.05m

Xiaoen Wu, Pingyuan Yang, Junhua Chen

{"title":"The strain softening model of rock damage under compression and tension","authors":"Xiaoen Wu, Pingyuan Yang, Junhua Chen","doi":"10.31534/engmod.2018.3.ri.05m","DOIUrl":"https://doi.org/10.31534/engmod.2018.3.ri.05m","url":null,"abstract":"Deformation and failure of brittle material under compression are different from those under tension. The differences are characteristic for the brittle material such as rock, concrete and others. At present, few constitutive models for rock can reflect the differences. A damage-induced softening model for rock constitutive relations is presented based on statistical strength theory, continuum damage mechanics and elastic mechanics. The model can consider properties of rock mechanics such as strain softening, difference in strength between compression and tension, nonliner stress-strain relation, compressive hardening, brittleness and so on. The model is welladapted, simple and practical as it is flexible and has only 7 parameters which can be easily obtained from uniaxial test under compression and tension. Under triaxial compression, uniaxial compression and uniaxial tension, the stress-strain relations obtained from the presented model are compared with those obtained from laboratory tests. The comparisons show that the differences between results obtained respectively from the presented model and laboratory tests are small. The presented model is rational.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.3.ri.05m","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996513","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}

引用次数: 0

Multi-Label Classification Based on the Improved Probabilistic Neural Networ 基于改进概率神经网络的多标签分类

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/engmod.2018.4.si.07s

Huilong Fan, Yongbin Qin

引用次数: 1

Automatic Task Matching and Negotiated Vehicle Scheduling for Intelligent Logistics System 智能物流系统的自动任务匹配与协商车辆调度

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/engmod.2018.4.si.04g

Xuanxuan Zhang

{"title":"Automatic Task Matching and Negotiated Vehicle Scheduling for Intelligent Logistics System","authors":"Xuanxuan Zhang","doi":"10.31534/engmod.2018.4.si.04g","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.04g","url":null,"abstract":"The decision-making of logistics vehicle scheduling is difficult under varying constraints, multiple disturbances and strong time-variation. The multi-agent system (MAS) is a new approach to investigate the real-time decision-making of logistics vehicle scheduling. It satisfies the various requirements of the logistics system, such as the geographical distribution of vehicles, the dynamic changes of information, and the constant changes in consumer orders. In view of the theoretical and practical significance of the MAS, this paper explores the decision-making of logistics vehicle scheduling based on the MAS, and relies on two-level planning modelling method to construct the mathematical model of outsourcing-based container port vehicle scheduling problem. Then, an effectively exchange neighbourhood tabu search algorithm was designed to solve the model. Through the research, it is concluded that the proposed hierarchical decomposition method of logistics distribution task can reduce the overall scheduling difficulty and reduce the actual planning error effectively; the established MAS-based intelligent logistics scheduling model can minimize the total distribution cost through continuous adjustment of resources according to the distribution task. Finally, the feasibility of the proposed algorithm was verified by the results of a calculation example.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.04g","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996887","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}

引用次数: 3

The effects of grain structure on electromigration failure of the lead-free solder bump 晶粒结构对无铅凸点电迁移失效的影响

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/ENGMOD.2018.3.RI.06D

Yuanxiang Zhang, L. Liang, Dongdong Zhu

引用次数: 1

A Cooperative High-Speed Positioning Control System for Dual-Axis Permanent-Magnet Linear Motor 双轴永磁直线电机协同高速定位控制系统

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/engmod.2018.4.si.08s

Chao Zhang, Yudan Yang, Su Pan

引用次数: 0

Surface roughness modelling in super duplex stainless steel turning 超级双相不锈钢车削表面粗糙度建模

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/ENGMOD.2018.3.RI.02F

Mario Veić, S. Jozić, D. Bajić

{"title":"Surface roughness modelling in super duplex stainless steel turning","authors":"Mario Veić, S. Jozić, D. Bajić","doi":"10.31534/ENGMOD.2018.3.RI.02F","DOIUrl":"https://doi.org/10.31534/ENGMOD.2018.3.RI.02F","url":null,"abstract":"Super duplex stainless steels are alloys that have good corrosion resistance properties and are intended for applications in corrosive environments. Due to their chemical composition and microstructure providing high strength and thermal resistance as well as high ductility, the machinability of these alloys is difficult, resulting in longer production cycles and higher costs in terms of more frequent replacement of tools. In this paper, the machinability of the super duplex EN 1.4410 was investigated under environmentally friendly machining process by using cold compressed air as a coolant. Experimental data were generated using the range of selected input parameters and correspondingly analysed surface roughness as output data. Predictive models were developed in order to make a comparison of their prediction performance. In addition, this paper also describes the methodology for optimised development of a particular predictive model. Finally, comparative analysis of the accuracy of predictive models was performed in order to define which model represents the best fit for the analysed experimental data, and also to show validity of the optimisation process.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/ENGMOD.2018.3.RI.02F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996445","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}

引用次数: 2

Dynamic Modelling of an Automated Vehicle Storage and Retrieval System and a Simulation Analysis of its Efficiency 车辆自动存取系统的动态建模及效率仿真分析

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/engmod.2018.4.si.03g

Zou Xia, Wu Yaohua, Xiao Delong, Chen Yunxia

{"title":"Dynamic Modelling of an Automated Vehicle Storage and Retrieval System and a Simulation Analysis of its Efficiency","authors":"Zou Xia, Wu Yaohua, Xiao Delong, Chen Yunxia","doi":"10.31534/engmod.2018.4.si.03g","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.03g","url":null,"abstract":"In this paper operating-time models for single and multiple instructions are set up considering an AVS/RS (automated vehicle storage and retrieval system). The operation times of AVS/RS and AS/RS (automated storage and retrieval system) are simulated in different situations by changing the shelf structure and order density. The results show that the AVS/RS is more efficient than the AS/RS in all situations. Furthermore, the numbers of rows and columns of storage shelves greatly influence the operation time. The graph of operation-time compression ratio against number of columns shows an inverted U-type distribution, and the compression ratio decreases and ultimately tends to zero as the number of rows is increased. Also, the order density affects the efficiency difference between the two systems: the higher the order density, the higher the AVS/RS operatingtime compression rate. Finally, compared with the AS/RS, the AVS/RS operating-time compression ratio improves greatly with increasing density and number of rows because of parallel operations, whereas with decreasing density and number of rows the AVS/RS advantages are gradually lost and the compression ratio decreases and eventually even reaches zero.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.03g","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996695","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}

引用次数: 4

The Influence of Receiver Selection Strategy on Packet Success Probability in Ad Hoc Network Ad Hoc网络中接收者选择策略对分组成功概率的影响

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/engmod.2018.4.si.06s

Nana Li, Changhai Chen, Dongyao Zou, Shaolei Zhang

引用次数: 0

Numerical Model for Fluid-Structure Interaction by the Coupled SPH and the FEM Method 流固耦合SPH与有限元方法的数值模型

International Journal for Engineering Modelling Pub Date : 2019-01-01 DOI: 10.31534/engmod.2019.1.ri.02m

A. Harapin, Jure Radni, Marina Sunara Kusi

引用次数: 2

Design of optimised linear quadratic regulator for capsule endoscopes based on artificial bee colony tuning algorithm 基于人工蜂群调谐算法的胶囊内窥镜线性二次优化调节器设计

International Journal for Engineering Modelling Pub Date : 2018-09-07 DOI: 10.31534/ENGMOD.2018.1-2.RI.02_VJAN

Ibrahim K. Mohammed, Abdulla I. Abdulla

{"title":"Design of optimised linear quadratic regulator for capsule endoscopes based on artificial bee colony tuning algorithm","authors":"Ibrahim K. Mohammed, Abdulla I. Abdulla","doi":"10.31534/ENGMOD.2018.1-2.RI.02_VJAN","DOIUrl":"https://doi.org/10.31534/ENGMOD.2018.1-2.RI.02_VJAN","url":null,"abstract":"Wireless Capsule Endoscope (WCE) is a new medical device that can be used for examining the whole digestive tract if effectively actuated. In this paper, a new three-coil actuator is proposed for the capsule endoscope navigation system. The proposed system, which is based on the currentcontrolled magnetic levitation concept, utilises a small permanent magnet within the capsule body and an arrangement of controlled electromagnet actuator placed on a movable frame. The dynamics of the proposed control system is modelled mathematically and then formulated in state space form. In this research, the Linear Quadratic Regulator (LQR) technique is used for designing a 3DOF controller for the capsule actuation system. Artificial Bee Colony (ABC) tuning algorithm is used for obtaining optimum values for controller gain parameters. The optimised LQR controller is simulated by using the Matlab/Simulink tool, and its performance is then evaluated based on the stability and control effort parameters to validate the proposed system. Finally, the simulation results suggest that the LQR controller based on the ABC optimisation method can be adopted to synthesise an effective capsule actuation system.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/ENGMOD.2018.1-2.RI.02_VJAN","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42354760","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}

引用次数: 5