Abstract The development of COVID-19 vaccine is highly concerned by all countries in the world. So far, many kinds vaccines have entered phase III clinical trial. However, it difficult to deliver efficiently and safely areas affected epidemic. This paper focuses on transportation a supply chain model composed one distributor retailer (clinic or hospital), which procures from manufacturer then resells them retailer. Distributor detects activity level vaccines, responsible for vaccines....

This paper constructs a continuous dual-channel closed-loop supply chain (DCLSC) model with delayed decision under government intervention. The existence conditions of the local stability equilibrium point are discussed. We analyze influence delay parameters, adjustment speed wholesale price, recovery rate waste products, direct carbon quota subsidy, and tax on complexity by using bifurcation diagram, entropy attractor, time series diagram so on. Besides, feedback control method is adopted...

Small and micro enterprises play a very important role in economic growth, technological innovation, employment social stability etc. Due to the lack of credible financial statements reliable business records small enterprises, they are facing financing difficulties, which has become an factor hindering development enterprises. Therefore, credit risk measurement model based on integrated algorithm improved GSO (Glowworm Swarm Optimization) ELM (Extreme Learning Machine) is proposed this...

Purpose The purpose of this study is to analyze the short-term development pattern and long-term trend digital supply chain. Design/methodology/approach This uses combination game evolutionary theory. Findings suggest that irrational decisions can make path chain complex unpredictable. Originality/value proposes an model for provide good guidance digitalization process enterprises.

Taking the carbon emissions per unit product as standard to measure low-carbon technology level of enterprise, this article analyzed how supplier enterprises realize production and achieve a win-win situation for both supply demand through sharing research development. Based on positive effect demand, we studied optimal pricing strategy in under Stackelberg game 3 conditions (i.e., without development or sharing, with but no sharing). We also drew comparative analysis price, level, profit...

Due to the important role of vaccines in prevention global epidemics, this paper focuses on a vaccine transportation supply chain composed one distributor and retailer. Based assumption that decision-maker does not make decision instantaneously, we present decision-making time-delay model. Firstly, captured some sufficient conditions delay-induced bifurcation for model by regarding different combinations delay periods as parameters analyzed how speed adjustment or retailer affects critical...

The popularity of new energy vehicles is undoubtedly the best response to current global call protect environment, and subsequent waste battery recycling remanufacturing industry quietly emerging under government promotion. This paper considers provides production subsidy or consumption for a supply chain consisting manufacturer remanufacturer. main theme this research explore impacts these two types on short-term game long-term evolutionary behaviors To be specific, Cournot model built exam...

In this paper, we investigate a supply chain consisting of an OEM (i.e., original equipment manufacturer) and CM (contract manufacturer), in which the decides design effort level marketing level, makes decision on product manufacturing level. We establish three-dimensional discrete dynamic model with time delay. Firstly, sufficient conditions for Neimark–Sacker bifurcation are obtained by using different combinations delay periods as parameters, effect adjustment speeds variables system...

In decentralized policy, lot sizing models with backlogging (LSP-B) tend to neglect the effects of market on production. this paper, pricing is introduced into general LSP-B and by coordinating LSP-B, rational price can be set such that firm's profit maximized. Demand a deterministic function price. It primarily concerned same selling product maintained throughout horizon. An exact algorithm developed solve joint fixed in polynomial time. The based alternate decisions By restarting...

The multi-item capacitated lot sizing problems (MCLSP) extensively studied paid little attention to the product prices and neglected effects of market on production. However, pricing production are coordinated here, dynamic introduced into our model as decision variables. demand is a function price. An item-by-item heuristic algorithm developed, which transforms J-item problem J single-item problems. also includes Lagrangean upper bound lower problem. A special case with linear price...