RAIRO Oper. Res.最新文献_第2页

Opt-RNN-DBFSVM: Optimal recurrent neural network density based fuzzy support vector machine Opt-RNN-DBFSVM:基于最优递归神经网络密度的模糊支持向量机

RAIRO Oper. Res. Pub Date : 2023-08-01 DOI: 10.1051/ro/2023114

K. E. Moutaouakil, Abdellatif el Ouissari

{"title":"Opt-RNN-DBFSVM: Optimal recurrent neural network density based fuzzy support vector machine","authors":"K. E. Moutaouakil, Abdellatif el Ouissari","doi":"10.1051/ro/2023114","DOIUrl":"https://doi.org/10.1051/ro/2023114","url":null,"abstract":"When implementing SVMs, two major problems are encountered: (a) the number of local minima increases exponentially with the number of samples and (b) the quantity of required computer storage, required for a regular quadratic programming solver, increases by an exponential magnitude as the problem size expands. The Kernel-Adatron family\u0000of algorithms gaining attention lately which has allowed to handle very large classification and regression problems. However, these methods treat different types of samples (Noise, border, and core) with the same manner, which causes searches in unpromising areas and increases the number of iterations. In this work , we introduce a hybrid method to overcome these shortcoming, namely Optimal Recurrent Neural Network Density Based Support Vector Machine (Opt-RNN-DBSVM). This method consists of four steps: (a) characterization of different samples, (b) elimination of samples with a low probability of being a support vector, (c) construction of an appropriate recurrent neural network based on an original energy function, and (d) solution of the system of differential equations, managing the dynamics of the RNN, using the Euler-Cauchy method involving an optimal time step. Thanks to its recurrent architecture, the RNN remembers the regions explored during the search process. We demonstrated that RNN-SVM converges to feasible support vectors and Opt-RNN-DBSVM has a very low time complexity compared to RNN-SVM with constant time step, and KAs-SVM. Several experiments were performed on academic data sets. We used several classification performance measures to compare Opt-RNN-DBSVM to different classification methods and the results obtained show the good performance of the proposed method.","PeriodicalId":20872,"journal":{"name":"RAIRO Oper. Res.","volume":"1 1","pages":"2493-2517"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90917870","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

The strategic interaction between business mode and store brand introduction in a platform-based supply chain 基于平台的供应链中商业模式与店铺品牌导入的战略互动

RAIRO Oper. Res. Pub Date : 2023-08-01 DOI: 10.1051/ro/2023113

Jianheng Zhou, Yajie Ji

{"title":"The strategic interaction between business mode and store brand introduction in a platform-based supply chain","authors":"Jianheng Zhou, Yajie Ji","doi":"10.1051/ro/2023113","DOIUrl":"https://doi.org/10.1051/ro/2023113","url":null,"abstract":"The phenomenon of store brands introduced by large-scale platforms is becoming common, and manufacturers should carefully choose the business mode of selling national brand (NB) products via platforms. Considering big-data marketing, we examine the sales mode selection in a platform-based supply chain based on the strategic interaction between the business mode decision and store brand decision. By continuous dynamic game theory, the strategies and performance under different modes are solved. We find that given the store brand (SB) decision, the business mode adopted by the manufacturer depends only on the commission rate, which is high for reselling and low for agency selling. Given the business mode, under reselling, whether the platform introduces SB depends only on the brand preference, i.e., SB is introduced when the preference for NB is low. While under agency, he introduces SB in the general or relatively passive situation, depending both on the commission rate and the brand preference. In addition, four equilibrium sales modes are obtained based on the strategic interaction. In order to achieve a “win-win-win” situation in profitability among the manufacturer, the platform and the platform-based supply chain, the manufacturer should adopt agency selling and the platform forgoes introducing SB when both the commission rates and NB preference are low.","PeriodicalId":20872,"journal":{"name":"RAIRO Oper. Res.","volume":"11 1","pages":"2331-2362"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84301373","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

Financing and coordination of the agricultural supply chain considering government-enterprise guarantee 考虑政企担保的农业供应链融资与协调

RAIRO Oper. Res. Pub Date : 2023-08-01 DOI: 10.1051/ro/2023116

Qihui Lu, Changhua Liao, Tingting Xu

{"title":"Financing and coordination of the agricultural supply chain considering government-enterprise guarantee","authors":"Qihui Lu, Changhua Liao, Tingting Xu","doi":"10.1051/ro/2023116","DOIUrl":"https://doi.org/10.1051/ro/2023116","url":null,"abstract":"We examine an agricultural supply chain consisting of a core enterprise and a capital-constrained farmer and assess the yield uncertainty of farmer's production. We explore two kinds of financing models: traditional bank financing and government-enterprise guarantee financing. To coordinate the supply chain, a price commitment contract and a revenue-sharing contract are considered. Our results show that no matter in bank or government-enterprise guarantee financing model, we can find the conditions for full coordination of the supply chain with any contract. However, in the government-enterprise guarantee financing model, when a farmer has bankrupt risk in a low-yield season and no bankrupt risk in a high-yield season, the revenue-sharing contract can simultaneously make the supply chain fully coordinated and achieve Pareto improvement to maximize the profits of the entire supply chain and achieve a win-win situation. In addition, the farmer and enterprise prefer to choose the financing model with a higher promised price and a higher revenue-sharing ratio, and the social welfare under the government-enterprise guarantee financing model is higher than that under the traditional bank financing model.","PeriodicalId":20872,"journal":{"name":"RAIRO Oper. Res.","volume":"30 1","pages":"2363-2392"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81305330","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

Optimal pricing strategy for new products considering reference price effect in advance selling 预售中考虑参考价格效应的新产品最优定价策略

RAIRO Oper. Res. Pub Date : 2023-07-18 DOI: 10.1051/ro/2023102

Wen Zhang, Yan Zhang, Xujin Pu, Zhenzhen Wang

{"title":"Optimal pricing strategy for new products considering reference price effect in advance selling","authors":"Wen Zhang, Yan Zhang, Xujin Pu, Zhenzhen Wang","doi":"10.1051/ro/2023102","DOIUrl":"https://doi.org/10.1051/ro/2023102","url":null,"abstract":"Previous research has shown that retailers' operations and consumers' purchase choices are significantly influenced by reference prices. This study explores a retailer selling some new products to strategic consumers in advance selling, and addresses the impact of reference price effect on the advance selling strategy and corresponding pricing decisions. Consumers' choices are determined by their purchasing utilities which are dependent on the selling price in current period and the reference price. We first drive optimal selling prices and corresponding profits of the retailer under the scenarios of no advance selling, advance selling without considering the reference price effect, and advance selling with considering the reference price effect, respectively. We find an advance selling strategy is not always beneficial for the retailer. Besides, results present that the retailer benefits from considering reference price effects only if the positive reference effect is relatively high. Finally, numerical studies show that dynamic pricing is dominated by price commitment, which reaches the maximum when positive and negative reference effects parameters are both the highest.","PeriodicalId":20872,"journal":{"name":"RAIRO Oper. Res.","volume":"3 1","pages":"2045-2066"},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86173812","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

Seidel spectra of some variants of corona operations 某些电晕操作变体的赛德尔谱

RAIRO Oper. Res. Pub Date : 2023-07-18 DOI: 10.1051/ro/2023104

Meiqun Cheng, Shu-Yu Cui, Gui-Xian Tian

引用次数: 0

General and multiplicative non-parametric models with interval ratio data: application to the banking industry 区间比率数据的一般和乘性非参数模型:在银行业中的应用

RAIRO Oper. Res. Pub Date : 2023-07-18 DOI: 10.1051/ro/2023103

Esmaeel Farzadi, A. Hadi-Vencheh, Yong Tan, Zahra Gheleg Beigi

引用次数: 0

A new lower bound for the independent domination number of a tree 树的独立支配数的新下界

RAIRO Oper. Res. Pub Date : 2023-07-13 DOI: 10.1051/ro/2023100

Abel Cabrera Martínez

引用次数: 0

Global convergence via modified self-adaptive approach for solving constrained monotone nonlinear equations with application to signal recovery problems 求解约束单调非线性方程的修正自适应全局收敛方法及其在信号恢复问题中的应用

RAIRO Oper. Res. Pub Date : 2023-07-07 DOI: 10.1051/ro/2023099

M. Abdullahi

引用次数: 1

Research on supply chain pricing decisions considering the advertising effect under market encroachment 市场侵占下考虑广告效应的供应链定价决策研究

RAIRO Oper. Res. Pub Date : 2023-07-01 DOI: 10.1051/ro/2023084

Song Shi

引用次数: 0

Quality and price competition in a duopoly under product liability and traceability 在产品责任和可追溯性的双头垄断下的质量和价格竞争

RAIRO Oper. Res. Pub Date : 2023-06-26 DOI: 10.1051/ro/2023096

Jianchang Fan, Nana Wan, Zhun Li, H. Fu

{"title":"Quality and price competition in a duopoly under product liability and traceability","authors":"Jianchang Fan, Nana Wan, Zhun Li, H. Fu","doi":"10.1051/ro/2023096","DOIUrl":"https://doi.org/10.1051/ro/2023096","url":null,"abstract":"Our study aims to explore how traceability affects quality and price competition in a duopoly. A theoretical model is developed in which both enterprises are liable to recall low-quality products identified by traceability and compensate consumers for the disutility caused by unidentified low-quality products. The equilibrium results are derived by determining the optimal product quality and sales price decisions. The key findings are highlighted below. (1) Traceability affects product quality primarily through the expected social cost (the sum of expected recall cost and expected consumer disutility), i.e., higher (lower) expected social cost induced by increased traceability of each enterprise leads to higher (lower) product quality for both enterprises, enhancing (reducing) quality competition. (2) If an enterprise’s improved (decreased) product quality is driven by its own increased traceability, it will result in lower (higher) consumer demand and profit, while it will result in higher (lower) consumer demand and profit if caused by its competitor’s increased traceability. (3) If an enterprise’s increased traceability results in higher expected social cost, the enterprise’s sales price falls while the competitor’s sales price rises; otherwise, both enterprises’ sales prices fall, leading to greater price competition. (4) Quality competition is unaffected by product liability but is improved by increased recall cost and consumer disutility, whereas price competition is enhanced by increased consumer disutility but is reduced by increased product liability and recall cost. Managerial insights are also discussed.","PeriodicalId":20872,"journal":{"name":"RAIRO Oper. Res.","volume":"21 1","pages":"1913-1950"},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81983844","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