Proceedings of the 14th International Conference on Computer Modeling and Simulation最新文献

Remote sensing road segmentation and breakpoint repair based on deep learning 基于深度学习的遥感道路分割与断点修复

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547609

Yuanyuan Li, Haibo Zhang, Lei Cai, Junping Ren, Shengting Xiang

引用次数: 0

A Formation Maintenance Method of UAV Swarm under Wind Disturbances 风扰动下无人机编队维护方法研究

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547603

Lei Fu, Ruizhi Mao, Yu Yang, Yachao Yang

{"title":"A Formation Maintenance Method of UAV Swarm under Wind Disturbances","authors":"Lei Fu, Ruizhi Mao, Yu Yang, Yachao Yang","doi":"10.1145/3547578.3547603","DOIUrl":"https://doi.org/10.1145/3547578.3547603","url":null,"abstract":"Formation maintenance control is one of the important methods to maintain the flight stability of multiple UAVs, and the inevitable wind disturbances during formation flight make many existing methods difficult to implement. In this paper, we study the formation maintenance problem when multiple UAVs fly according to the preset trajectory under wind disturbances, and propose a novel decentralized formation control method. A synchronized trajectory generation method that can resist wind disturbances is designed in this paper. The method generates a real-time formation trajectory for each UAV, estimates the time for local aircraft to complete this trajectory after eliminating errors caused by wind, and obtains the time to reach the next waypoint together through inter-aircraft communication. To satisfy the time constraint of the formation trajectory, the trajectory tracker of each UAV generates a virtual point for the local aircraft. A kinematic relationship is established for the UAV to track its virtual point, and a PD velocity controller with wind compensation is designed to enable the UAV to accurately track its virtual point location. We used hardware-in-the-loop simulations to demonstrate the effectiveness of the formation maintenance method in a variety of wind speeds. Subsequently, a field flight test of triangular formation was conducted using 6 miniature fixed-wing UAVs, and the designed formation method can reduce the formation error to about 3m under 6m/s wind speed disturbance.","PeriodicalId":381600,"journal":{"name":"Proceedings of the 14th International Conference on Computer Modeling and Simulation","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132844409","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

Temperature Field Analysis of Cylindrical Roller Bearing based on Rheological Properties of Grease 基于润滑脂流变特性的圆柱滚子轴承温度场分析

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547596

Liqun Wang, Yongzhi Pan, Zhenfeng Jiang, Yinhang Zhang, X. Fu, Xiuhua Men

{"title":"Temperature Field Analysis of Cylindrical Roller Bearing based on Rheological Properties of Grease","authors":"Liqun Wang, Yongzhi Pan, Zhenfeng Jiang, Yinhang Zhang, X. Fu, Xiuhua Men","doi":"10.1145/3547578.3547596","DOIUrl":"https://doi.org/10.1145/3547578.3547596","url":null,"abstract":"The rheological properties of grease have a significant influence on the heat generation and heat transfer of bearings. However, due to the combined effects of shear rate, temperature and load, there are few studies on the bearing temperature field considering the rheological properties of grease. In this paper, the Bauser four-parameter model describing the rheological properties of grease is used to calculate the heat generation of bearings under grease lubrication conditions and conduct finite element analysis on the temperature field of bearings by considering the effects of viscosity of different grease base oils, plastic viscosity and shear rate affected by working conditions on heat generation and heat distribution. Considering the contact heat between the roller and inner and outer raceway and viscous friction heat of the cage, the raceway is regarded as a moving heat source, and the finite element analysis model of grease-lubricated cylindrical roller bearing is established. Taking a certain type of bearing as an example, the distribution law of bearing working temperature under different grease lubrication conditions is analyzed. The results show that under the condition of considering the rheological properties of grease, the heat generation of bearings under different grease lubrication conditions is quite different. The highest temperature inside the bearing appears at the contact center between the roller and the outer raceway, and the area with a higher temperature is more prone to surface damage.","PeriodicalId":381600,"journal":{"name":"Proceedings of the 14th International Conference on Computer Modeling and Simulation","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132137490","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: 1

A Model Based on Survival-based Credit Risk Assessment System of SMEs 基于生存的中小企业信用风险评估系统模型

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547615

Jia Chen, Chunjie Wang, R. Leone

{"title":"A Model Based on Survival-based Credit Risk Assessment System of SMEs","authors":"Jia Chen, Chunjie Wang, R. Leone","doi":"10.1145/3547578.3547615","DOIUrl":"https://doi.org/10.1145/3547578.3547615","url":null,"abstract":"Assessment of the credit risk of small and medium-sized enterprises (SMEs) based on their strength and reputation is very important for the banks as the basis for credit decisions. We establish a model of credit risk assessment system for SMEs based on Nonparametric Maximum Likelihood Estimation (NPMLE) of survival function which addresses the Case Ⅱ interval-censored data. An empirical analysis of a real data set about 425 Chinese SMEs is carried out. Firstly, the data information of 425 SMEs are preprocessed and three main factors are considered: enterprise strength, development potential, situation of supply and demand relationship of upstream and downstream. Then we extract appropriate features based on those factors. The association between credit risk of SMEs and the extracted features is discussed and variable selection is implemented by Random Forest. What's more, the prediction of the credit risk is carried out by Double Random Forest (DRF), which is a competitive ensemble method in classification and prediction. The predictive accuracy is evaluated by ROC curves and confusion matrices, and the outcomes show that DRF outperforms Support Vector Machine (SVM) and Random Forest (RF). Combining the outcomes of prediction with the features, the intervals into which the repayment time fall are obtained, and hence the data set is Case Ⅱ interval-censored, i.e., the exact time of repayment is unknown and we only know that the repayment time falls into an interval. The issue of risk assessments based on Case Ⅱ interval-censored has received little attentions in the literature. Here the case of prepayment, on-time and late payment are all under discussion. The NPMLE is applied to estimate the probability of repayment varying with time. The survival curves of SMEs with different credit rating are drawn, thus establishing a credit risk assessment system for SMEs.","PeriodicalId":381600,"journal":{"name":"Proceedings of the 14th International Conference on Computer Modeling and Simulation","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115931828","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

Numerical Simulation and Analysis of Hot Extrusion Preforming of Powder Titanium Alloy Valve 粉末钛合金阀门热挤压预成形数值模拟与分析

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547583

Ronge Liu, Bao-yu Wang, Shushan Hu

引用次数: 0

Flexsim-based Simulation and Optimization of Green Logistics Distribution Center 基于flexsim的绿色物流配送中心仿真与优化

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547590

Shuai Wang, Shumeng Wang, Nianbing Zhang

{"title":"Flexsim-based Simulation and Optimization of Green Logistics Distribution Center","authors":"Shuai Wang, Shumeng Wang, Nianbing Zhang","doi":"10.1145/3547578.3547590","DOIUrl":"https://doi.org/10.1145/3547578.3547590","url":null,"abstract":"Based on the comprehensive analysis of the characteristics of logistics distribution center and logistics system simulation methods, a complete framework of the layout planning problem of logistics distribution center is established. By using the logistics simulation software Flexsim, a simple modeling simulation of the whole process of logistics distribution center is carried out, and according to the analysis of the simulation results, the problems of this logistics system are identified, and optimization and improvement are made. Firstly, the system model of the simulation model was established by analyzing and planning the layout and operation process of a small logistics distribution center. Secondly, Flexsim; simulation software is selected to model and simulate the distribution center and get the corresponding model of logistics distribution center. The problems of the logistics distribution center were found better, and the planning scheme of the logistics distribution center was evaluated scientifically and reasonably, and the model was optimized to some extent. The effectiveness of using Flexsim to optimize the model of the logistics distribution center is demonstrated by comparing the difference between the model before and after optimization at a lower cost and faster speed.","PeriodicalId":381600,"journal":{"name":"Proceedings of the 14th International Conference on Computer Modeling and Simulation","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125385143","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

Blood Damage Analysis of ECMO Centrifugal Pump Based on CFD 基于CFD的ECMO离心泵血液损伤分析

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547582

Zheng-tang Tan

引用次数: 0

The Effect of Water Penetration Velocity on Temperature Field of Strip Steel 水渗透速度对带钢温度场的影响

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547601

Shushan Hu, Q. Zhang, Ronge Liu

引用次数: 0

Tool Wear Prediction Based on BiLSTMA Networks 基于BiLSTMA网络的刀具磨损预测

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547594

Chunyan Qian, Qingqing Huang, Haofei Xie, Dong Yan, Yushuang Wu

引用次数: 0

Design of Motor Skill Training Auxiliary Decision-Making Support System Based on Kinect 基于Kinect的运动技能训练辅助决策支持系统设计

Proceedings of the 14th International Conference on Computer Modeling and Simulation Pub Date : 2022-06-24 DOI: 10.1145/3547578.3547610

Fan Zhang

{"title":"Design of Motor Skill Training Auxiliary Decision-Making Support System Based on Kinect","authors":"Fan Zhang","doi":"10.1145/3547578.3547610","DOIUrl":"https://doi.org/10.1145/3547578.3547610","url":null,"abstract":"Aiming at the problem of insufficient stability of traditional motor skill training auxiliary decision-making system in dark or dark environment, this paper designs a motor skill training auxiliary decision-making support system based on Kinect. In terms of hardware design, Kinect is used as the main hardware and TOF technology is used to set the parameters of distance and reachable field of view to obtain motor skill training data. In terms of software design, Kinect is used to determine the bone node of human characteristics, track human data and smooth it, store the smoothed data in the designed data warehouse, and connect the scattered databases together as the support of auxiliary decision-making. On this basis, priority constraints are set for each module in the system to ensure the normal operation of the system. So far, the overall design of the system has been completed. The experimental results show that the motion training aided decision support system based on Kinect designed in this paper has more accurate recognition angle of human motion image and less joint position positioning error in the case of darkness or dark light, which proves that the system has good stability.","PeriodicalId":381600,"journal":{"name":"Proceedings of the 14th International Conference on Computer Modeling and Simulation","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133772669","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