区块链的安全检测模型

区块链是去中心化交易平台比特币的底层技术.该系统由分布式数据存储、点对点传输、共识机制、加密算法等计算机技术组成,其安全性受到广泛关注.目前的研究大多使用数学证明的方法分析每个攻击的作用,因此提出了一种根据区块链的结构来评估和检测安全性的方法.在真实环境下,当一个区块连接超过6个区块后,该区块的内容基本无法改变,被认为是稳定状态,分支产生的概率逐渐降低,因此,整个系统的状态是无限循环的.该方法通过分析每个结构到达稳定状态的概率来评估系统的安全性,并通过实验分析了攻击力度、攻击状态和实验循环次数之间的关系,验证了该方法的可行性和有效性.

Experimental study on the variation law of coal temperature during excavation in coal mines

By testing the temperature of the coal and the stress of the working surface, we got the variation law of coal temperature and coal stress during the excavation. The result shows that the activities of mining affect the coal temperature, the fluctuation of coal temperature and the coal stress is synchronous. During the smooth change of crustal stress, the coal temperature basically keeps unchanged, when the dynamic phenomenon appears, the coal temperature changes, as well the coal stress. Therefore, we can use the online coal temperature monitoring system to test the coal temperature of the working surface continuously, and it can provide basic information for forecasting coal mine power disaster before it happens.