Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria最新文献_第2页

Simulation study of impact dynamics during LNG transportation LNG运输过程中冲击动力学仿真研究

4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.09.004

B. Liu

引用次数: 0

Optimal ordering policies in response to a disposable coupon 针对一次性优惠券的最优订购策略

IF 0.5 4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.06.006

A. Zu, M. Yue

{"title":"Optimal ordering policies in response to a disposable coupon","authors":"A. Zu, M. Yue","doi":"10.23967/j.rimni.2023.06.006","DOIUrl":"https://doi.org/10.23967/j.rimni.2023.06.006","url":null,"abstract":"This study investigates a retailer's ordering strategy under the framework of the economic order quantity (EOQ) model. A supplier offers a retailer a disposable coupon and allows it to place a special order at any time in a promotion period. The promotion period is not necessary short and shortages are allowed throughout the time horizon. In addition to the special order time and the special order quantity, the retailer needs to decide whether to place some regular orders in the promotion period before placing the special order for the purpose of making better use of this coupon. We show that the coupon should be used to the retailer's first order in the promotion period regardless of the duration of the promotion period. Moreover, the retailer's maximum inventory level is higher than that in the classical EOQ model. We find that a longer promotion period can benefit the retailer by endowing it with more flexibility in its decision-making. Therefore, the supplier can improve the cash flow and reduce the overstock by integrating a disposable coupon with a longer promotion period. Numerous managerial insights are obtained from sensitivity analysis and numerical experiments.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68782118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A deep learning-based prognostic framework for aeroengine exhaust gas temperature margin 基于深度学习的航空发动机排气温度裕度预测框架

IF 0.5 4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.05.002

W. Fu, X. Tan, L. Ao, Y. Fu, P. Guo

{"title":"A deep learning-based prognostic framework for aeroengine exhaust gas temperature margin","authors":"W. Fu, X. Tan, L. Ao, Y. Fu, P. Guo","doi":"10.23967/j.rimni.2023.05.002","DOIUrl":"https://doi.org/10.23967/j.rimni.2023.05.002","url":null,"abstract":"The value of the gas-path parameter, exhaust gas temperature margin (EGTM), is the critical index for predicting aeroengine performance degradation. Accurate predictions help to improve engine maintenance, replacement schedules, and flight safety. The outside air temperature (OAT), altitude of the airport, the number of flight cycles, and water washing information were chosen as the sample input variables for the data-driven prognostic model for predicting the take-off EGTM of the on-wing engine. An attention-based deep learning framework was proposed for the aeroengine performance prediction model. Specifically, the multiscale convolutional neural network (CNN) structure is designed to initially learn sequential features from raw input data. Subsequently, the long short-term memory (LSTM) structure is employed to further extract the features processed by the multiscale CNN structure. Furthermore, the proposed attention mechanism is adopted to learn the influence of features and time steps, assigning different weights according to their importance. The actual operation data of the aeroengine are used to conduct experiments, where the experimental results verify the effectiveness of our proposed method in EGTM prediction.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68782387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seakeeping analysis of dead ship condition in fishing ships based on Artificial Neural Networks 基于人工神经网络的渔船死船耐波性分析

4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.10.004

P. Romero-Tello, B. Serván-Camas, J. Gutiérrez, J. Piazzese

引用次数: 0

Construction monitoring and finite element simulation of assembly support for large cantilever cover beam 大型悬臂盖梁装配式支架施工监测及有限元仿真

IF 0.5 4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.01.001

C. Qu, H. Fang, Q. Feng

{"title":"Construction monitoring and finite element simulation of assembly support for large cantilever cover beam","authors":"C. Qu, H. Fang, Q. Feng","doi":"10.23967/j.rimni.2023.01.001","DOIUrl":"https://doi.org/10.23967/j.rimni.2023.01.001","url":null,"abstract":"The study on the assembly support for the large cantilevered cover beam was carried out by conducting real-time monitoring on the assembly frames’ strain and displacement development processes in the actual project. Modeling of the support and numerical simulation for actual working conditions were presented. The monitoring data and analysis results show that the overall stress ratio of the support was less than 30%. And as the concrete structure being supported hardened, the support frame was unloaded. When the stress ratio was then reduced to less than 10%, it was the most appropriate time to remove the bracing frame. The maximum strain from the simulation did not exceed 66.26% of the theoretical maximum strain of the rod. The actual construction conditions and the spatial form of the support affected the force situation, resulting in the deviation from the theoretical maximum strain at certain phases. The analysis results and trends reflect the low utilization rate of such framing rods. The results of the study can be used as a reference for the topology optimization of assembled support frames for large cantilevered cover beams.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68781590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parallel computing for reducing time in security constrained optimal power flow analysis 并行计算在安全约束下优化潮流分析中的应用

IF 0.5 4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.01.004

D. Álvarez, D. Rodriguez, S. Rivera

引用次数: 0

Design and Performance Research of Single Rubber Cylinder for High Pressure Gas Injection Packer 高压注气封隔器单橡胶筒的设计与性能研究

IF 0.5 4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.05.004

L. Zhang, S. Wang, W. Lv, G. Yue, Y. Ge, Z. Zhao, X. Zhou

{"title":"Design and Performance Research of Single Rubber Cylinder for High Pressure Gas Injection Packer","authors":"L. Zhang, S. Wang, W. Lv, G. Yue, Y. Ge, Z. Zhao, X. Zhou","doi":"10.23967/j.rimni.2023.05.004","DOIUrl":"https://doi.org/10.23967/j.rimni.2023.05.004","url":null,"abstract":"In order to solve the problem of \"gas explosion\" at the end of common rubber cylinder in the process of high temperature, high pressure and gas drive operation, the rubber cylinder with new structure suitable for 51/2in casing pipe is developed. The \"M\" type single rubber cylinder structure is adopted in the new structure rubber cylinder, and the \"gas explosion\" problem of the end gas in the low-pressure side is solved by setting the double-layer staggered slotted steel cover to prevent outburst. The finite element method is used to simulate the setting of the rubber cylinder, and the structural parameters of the new rubber cylinder are obtained by single factor analysis and orthogonal optimization, simulation test and seal test were carried out to verify the sealing performance of the rubber cylinder. According to the actual working condition, the simulation test results and seal test results show that the sealing capacity of the packer reaches 50MPa under the temperature resistance of 120℃, and the end steel cover is fully opened to wrap the rubber cylinder, which meets the operation requirements of high temperature and high pressure gas injection packer.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68782402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parameter selection and experimental study of the rock particle crushing effect using an image-based method 基于图像的岩石颗粒破碎效果参数选择与实验研究

4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.10.007

L. Yu, P. Sun, S. Han, X. Tong, P. Peng

{"title":"Parameter selection and experimental study of the rock particle crushing effect using an image-based method","authors":"L. Yu, P. Sun, S. Han, X. Tong, P. Peng","doi":"10.23967/j.rimni.2023.10.007","DOIUrl":"https://doi.org/10.23967/j.rimni.2023.10.007","url":null,"abstract":"When maging is used to detect the crushing effect of rock particles, the selected characterization parameters are important factors affecting the results. The image-based detection system is composed of three parts: an image acquisition system, a storage platform, and a digital image processing system.The influence of loading mode and feeding particle size on rock crushing degree and rock morphology characteristics after crushing are analyzed respectively; The crushing ratio and sand-forming ratio of limestone, limestone and granite under shear and extrusion loads are analyzed. The experimental results show that the crushing ratio and sand formation rate play a key role in the crushing of rocks composed of different materials under shear compression loading. The effect analysis of crushing under the feed particle size of 9.5 mm to 16mm shows that there is a great correlation between edges and corners, roundness and overall contour. It provides a basis for the follow-up research on intelligent mine construction and equipment optimization, and is worthy of further popularization and application.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134979968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal motion planning of hopping robot based on pseudospectral method during flight phase 基于伪谱法的跳跃机器人飞行阶段最优运动规划

4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.09.002

N. Yingge, M. Xiangyan, Y. Ni

引用次数: 0

A new semi-analytical solution of compound KdV-Burgers equation of fractional order 分数阶复合KdV-Burgers方程的半解析解

4区工程技术

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI: 10.23967/j.rimni.2023.10.003

Z. Alqahtani, A. Hagag

引用次数: 0