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1.
Animals (Basel) ; 13(5)2023 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-36899754

RESUMO

The construction of marine ranching is a concrete practice to fulfil the strategic objective of China's maritime power. The shortage of funds has turned into an important issue to be resolved urgently in the modernization of marine ranching. This study constructs a supply chain system, involving a leading enterprise of marine ranching with short funds and a retailer, and introduces the government guidance fund to solve the issue of capital shortage. Then, we discuss the supply chain financing decision under two different power structure modes, and analyze the product environmental attribute (the product's environmental friendliness and the environmental enrichment) and the guiding effect of government investment on the operation of different modes. The research shows that: (1) The wholesale price of products is mainly influenced by the dominant position of the marine ranching leading enterprise. Furthermore, the wholesale price and the marine ranching company's profits increase with the growth of the product environmental attribute. (2) The retailer's profit and the supply chain system's profit are mainly affected by the dominant power of the retailer and are positively correlated with the product environmental attribute. In addition, the supply chain system's overall profits are negatively related to the guiding effect of government investment.

2.
Front Psychol ; 13: 921687, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36118444

RESUMO

Improving the innovation ability of organizations is the focal point of management study. This paper puts forward that innovative self-efficacy and employees' innovative behaviour are continuous mediating variables, and discusses the influence mechanism of employees' involvement and open service innovation from the individual factor level. In this study, a sample of 103 employees from travel companies was used to examine the hypothesis. The results show that employee engagement is positively related to open service innovation. Innovative self-efficacy plays a completely intermediary role between employee engagement and employee innovative behaviour; Creative self-efficacy and employees' innovative behaviour play a continuous intermediary role between employees' engagement and open service innovation. The results of this study will eventually help enterprises to carry out service innovation behaviour.

3.
PLoS One ; 11(3): e0152057, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27010658

RESUMO

CO2 emission influences not only global climate change but also international economic and political situations. Thus, reducing the emission of CO2, a major greenhouse gas, has become a major issue in China and around the world as regards preserving the environmental ecology. Energy consumption from coal, oil, and natural gas is primarily responsible for the production of greenhouse gases and air pollutants such as SO2 and NOX, which are the main air pollutants in China. In this study, a mathematical multi-objective optimization method was adopted to analyze the collaborative emission reduction of three kinds of gases on the basis of their common restraints in different ways of energy consumption to develop an economic, clean, and efficient scheme for energy distribution. The first part introduces the background research, the collaborative emission reduction for three kinds of gases, the multi-objective optimization, the main mathematical modeling, and the optimization method. The second part discusses the four mathematical tools utilized in this study, which include the Granger causality test to analyze the causality between air quality and pollutant emission, a function analysis to determine the quantitative relation between energy consumption and pollutant emission, a multi-objective optimization to set up the collaborative optimization model that considers energy consumption, and an optimality condition analysis for the multi-objective optimization model to design the optimal-pole algorithm and obtain an efficient collaborative reduction scheme. In the empirical analysis, the data of pollutant emission and final consumption of energies of Tianjin in 1996-2012 was employed to verify the effectiveness of the model and analyze the efficient solution and the corresponding dominant set. In the last part, several suggestions for collaborative reduction are recommended and the drawn conclusions are stated.


Assuntos
Poluentes Atmosféricos/análise , Poluição do Ar/prevenção & controle , Dióxido de Carbono/análise , Efeito Estufa/prevenção & controle , Óxido Nítrico/análise , Dióxido de Enxofre/análise , Poluição do Ar/análise , China , Mudança Climática , Simulação por Computador , Monitoramento Ambiental , Combustíveis Fósseis/análise , Modelos Químicos
4.
PLoS One ; 10(5): e0125939, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25993533

RESUMO

Free shipping with conditions has become one of the most effective marketing tools available. An increasing number of companies, especially e-businesses, prefer to offer free shipping with some predetermined condition, such as a minimum purchase amount by the customer. However, in practice, the demands of buyers are uncertain; they are often affected by many factors, such as the weather and season. We begin by modeling the centralized ordering problem in which the supplier offers a free shipping service and retailers face stochastic demands. As these random data are considered, only partial information such as the known mean, support, and deviation is needed. The model is then analyzed via a robust optimization method, and the two types of equivalent sets of uncertainty constraints that are obtained provide good mathematical properties with consideration of the robustness of solutions. Subsequently, a numerical example is used to compare the results achieved from a robust optimization method and the linear decision rules. Additionally, the robustness of the optimal solution is discussed, as it is affected by the minimum quantity parameters. The increasing cost-threshold relationship is divided into three periods. In addition, the case study shows that the proposed method achieves better stability as well as computational complexity.


Assuntos
Comércio , Custos e Análise de Custo , Meios de Transporte/economia
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