Cloud-Based Model For Evaluating Fishing Capacity,Safety And Energy Efficiency Of Marine Fishing Vessels

China is the world’s greatest producer of fishery,which is not only an important part of agriculture,but also an economic pillar of the country,the 21 st century has seen a dramatic expansion of the fishery industry with the intensification of reform and opening up and the adoption of the principle of sustainable growth,but the development has also given rise to numerous problems,the most prominent of which are the increasing depletion of fishery resources,gradually deteriorating fishery environment and increasing hidden dangers in fishing boat operation.The problems seriously restricted the sustainable development of China fishery and threatened the safety of fisher-men’s lives and property,so it is particularly important to evaluate the fishing capacity,safety and energy efficiency of fishing vessels.In this paper,we analyse the factors affecting the fishing capacity,safety and energy efficiency of fishing vessels,relevant evaluation indicator structure is identified and relevant evaluation models are constructed,taking into effect previous researches and policy documentation of relevant departments,which is of certain practical significance to control the fishing capacity,ensure the safety of fishing vessel operations and improve the energy efficiency of fishing vessels.Firstly,by identifying and summarizing the approaches and conclusions of past research on similar issues,this paper identifies the criteria for assessing the fishing ability of fishing vessels,safety and energy efficiency should belong to a multi-factor decision-making problem,The most important part of solving such problems is the conversion from qualitative to quantitative.This paper describes the main approaches to solving such problems,such as the analytic hierarchy process,the entropy weighting method and the cloud model evaluation method.Building on earlier research,all three methods have been consolidated to interchange qualitative and quantitative evaluations,and the composite weight-based cloud model evaluation method is used as the fundamental method for evaluation of fishing vessel-related characteristics.Secondly,drawing on an abundant review of the literature and the findings of preceding studies,we found that in the evaluation of fishing vessels’ fishing capacity,experts and scholars at home and abroad have mostly started from the perspective of economics and management,focusing their research on fishing vessel fishing ability on the vessel’s inputs and outputs,ignoring the factors of fishing vessels themselves such as fishing vessel specifications and gear types.In this paper,the elements of the fishing vessel itself are regarded and the design of the vessel is considered.an evaluation index system containing factors such as fishing vessel power,gross tonnage,vessel age,number of nets,net output and fishing vessel material is established,and the comments of various expert fishermen were also consulted by means of a questionnaire,and the evaluation index system was also eventually determined,and the weights of the correspondent indicators were counted.Comparison with the evaluation results obtained by the fuzzy comprehensive evaluation method,the evaluation results are basically identical.Again,the types of fishing vessel safety accidents mainly include man overboard accidents,fishing vessel capsizing accidents and waterway accidents,and the evaluation indexes are mostly based on fishing vessel stability,personnel factors and environment(wind and waves).The evaluation index system including fishing vessel specifications,fishing vessel equipment,fishing vessel structure,environmental factors and personnel factors was established and perfected,and the weights of relevant indexes were obtained by using the comprehensive weight extraction method.The evaluation outcomes were verified by the reliability of the model by comparing the results with those achieved by the fuzzy synthesis evaluation approach,and the results were generally identical.Finally,because there is little research on the evaluation of fishing boats’ energy efficiency at present,there is no evaluation index system related to it.From the perspective of ship energy consumption,this paper focuses on analyzing the related factors that affect fishing boats’ energy consumption,such as the type of fishing nets,the age and power,and obtains the factors that affect the energy efficiency index,such as gross tonnage,deadweight and speed,according to the calculation formula of ship energy efficiency index.In addition,through the investigation of fishermen and relevant experts,Other influencing indexes,such as sailing distance and sailing time,are obtained.Finally,in conjunction with the China Maritime Bureau’s ship energy consumption investigation form,the energy saving evaluation index system for fishing vessels was ascertained,and the weights of each indicator are also calculated by the composite weight formula.Applying the fuzzy comprehensive evaluation method and this method to the evaluation of fishing boat energy saving,the evaluation results are coherent,which authenticates the energy saving evaluation model for fishing vessels presented in this paper.