Beijing Key Laboratory of Big Data Technology for Food Safety, School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China.
Int J Environ Res Public Health. 2018 Aug 1;15(8):1627. doi: 10.3390/ijerph15081627.
The food supply chain is a complex system that involves a multitude of "stakeholders" such as farmers, production factories, distributors, retailers and consumers. "Information asymmetry" between stakeholders is one of the major factors that lead to food fraud. Some current researches have shown that applying blockchain can help ensure food safety. However, they tend to study the traceability of food but not its supervision. This paper provides a blockchain-based credit evaluation system to strengthen the effectiveness of supervision and management in the food supply chain. The system gathers credit evaluation text from traders by smart contracts on the blockchain. Then the gathered text is analyzed directly by a deep learning network named Long Short Term Memory (LSTM). Finally traders' credit results are used as a reference for the supervision and management of regulators. By applying blockchain, traders can be held accountable for their actions in the process of transaction and credit evaluation. Regulators can gather more reliable, authentic and sufficient information about traders. The results of experiments show that adopting LSTM results in better performance than traditional machine learning methods such as Support Vector Machine (SVM) and Navie Bayes (NB) to analyze the credit evaluation text. The system provides a friendly interface for the convenience of users.
食品供应链是一个复杂的系统，涉及到众多的“利益相关者”，如农民、生产工厂、分销商、零售商和消费者。利益相关者之间的“信息不对称”是导致食品欺诈的主要因素之一。一些现有研究表明，应用区块链技术可以帮助确保食品安全。然而，它们往往研究食品的可追溯性，而不是监管。本文提供了一个基于区块链的信用评估系统，以加强食品供应链中监管和管理的有效性。该系统通过区块链上的智能合约从贸易商那里收集信用评估文本。然后，通过名为长短期记忆（LSTM）的深度学习网络直接分析收集到的文本。最后，贸易商的信用结果将作为监管机构监督和管理的参考。通过应用区块链，贸易商可以对其在交易和信用评估过程中的行为负责。监管机构可以收集到更多关于贸易商的可靠、真实和充分的信息。实验结果表明，采用 LSTM 比传统的机器学习方法（如支持向量机（SVM）和朴素贝叶斯（NB））分析信用评估文本的效果更好。该系统为用户提供了一个友好的界面，方便用户使用。
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