Data sharing mechanism of various mineral resources based on blockchain

Basins with various mineral resources coexisting and enriching often occupy an important strategic position. The exploration of various mineral resources is repetitive at present due to unshared data and imperfect management mechanism. This situation greatly increases the cost of energy exploitation in the country. Traditional data-sharing mode has several disadvantages, such as high cost, difficulty in confirming the right of data, and lack of incentive mechanism, which make achieving real data sharing difficult. In this paper, we propose a data-sharing mechanism based on blockchain and provide implementation suggestions and technical key points. Compared with traditional data-sharing methods, the proposed data-sharing mechanism can realize data sharing, ensure data quality, and protect intellectual property. Moreover, key points in the construction are stated in the case study section to verify the feasibility of the data-sharing system based on blockchain proposed in this paper.     

以专业认证为抓手的化工专业人才培养模式研究与实践

为深入落实本科教育和人才培养的相关要求,实现高等教育内涵式发展,郑州大学化工专业以工程教育专业认证为抓手,践行以学生为中心的核心理念,以学生学习成果为导向,建立了“评价—反馈—改进”闭环和与用人单位协同持续改进的培养机制。教学过程中贯穿专业教育和课外教育,激发学生专业兴趣;坚持“以本为本”,培养卓越化工人才。教改在学生就业、竞赛、外部评价及专业建设等方面取得了较好的成效,提升了专业知名度及专业培养质量。     

油页岩矿物质催化半焦燃烧特性及机理

利用微型流化床反应分析仪（MFBRA）研究了油页岩矿物质催化半焦燃烧特性，重点考察了半焦内部矿物质和外部页岩灰床料对半焦燃烧的催化作用，揭示了流化床反应器中半焦燃烧过程和机理。结果表明：内部矿物质和外部床料对半焦燃烧均具有明显催化作用，而两者共同催化效果最为显著。矿物质中CaO和Fe₂O₃对半焦燃烧具有催化活性，CaO催化作用强于Fe₂O₃。油页岩半焦燃烧反应活化能在60.41~78.97 kJ/mol之间，矿物质的催化作用会明显降低反应活化能。流化床反应器中，矿物质对半焦燃烧的催化作用主要表现在四个反应，即：挥发分裂解和燃烧、半焦表面炭燃烧、半焦内部炭燃烧以及一氧化碳燃烧。     

Wearing prediction of stellite alloys based on opposite degree algorithm

In order to predict the wearing of stellite alloys,the related methods of rare metals data processing were discussed. The method of opposite degree(OD) algorithm was put forward to predict the wearing of stellite alloys.OD algorithm is based on prior numerical data, posterior numerical data and the opposite degree between numerical forecast data. To compare the performance of predicted results based on different algorithms, the back propagation(BP) and radial basis function(RBF) neural network methods were introduced. Predicted results show that the relative error of OD algorithm is smaller than those of BP and RBF neural network methods. OD algorithm is an effective method to predict the wearing of stellite alloys and it can be applied in practice.     

综采工作面安全快速过逆断层群的技术研究与应用

综采工作面在推进过程中经常会受到断层的影响，严重制约了矿井的安全生产及经济效益。以寺河煤矿西井区W2303工作面采用留顶煤、割底矸等手段过逆断层群为工程实例，分析了综采工作面安全、快速过逆断层群技术的应用效果，对于类似矿山也有一定的借鉴价值。     

磁流变阻尼器抑制转子系统振动试验

针对大型旋转机械通过临界转速时振动过大及运行中故障频发等问题,搭建转子试验台,模拟启停机过程和碰摩、不对中故障。不改变原有支撑形式,安装自主设计的磁流变阻尼器,在不停机的情况下,试验研究阻尼器抑制转子通过临界转速时振动过大及各类故障振动。试验结果表明,阻尼器可以有效抑制转子系统临界转速附近的振动,降幅在60%以上;转子发生碰摩或不对中故障时,阻尼器可以降低其高倍频振动。     

Synergistic flame retardant effects of activated carbon and molybdenum oxide in poly(vinyl chloride)

The synergistic effects of activated carbon (AC) and molybdenum oxide (MoO₃) in improving the flame retardancy of poly(vinyl chloride) (PVC) were investigated. The effects of AC, MoO₃ and their mixture with a mass ratio of 1:1 on the flame retardancy and smoke suppression properties of PVC were studied using the limiting oxygen index and cone calorimeter tests. It was found that the flame retardancy of the relatively cheaper AC was slightly weaker than that of MoO₃. In addition, the incorporation of AC and MoO₃ greatly reduced the total heat release and improved smoke suppressant property of PVC composites. When the total content of AC and MoO₃ was 10 phr, PVC/AC/MoO₃ had the lowest peak heat release rate and peak smoke production rate values of 173.80 kW m^?2 and 0.1472 m² s^?1, which represented reductions of 47.3 and 59.9%, respectively, compared with those of PVC. Furthermore, thermogravimetric analysis and gel content tests were used to analyze the flame retardant mechanism of AC and MoO₃, with results showing that AC could promote early crosslinking in PVC. Char residue left after heating at 500 °C was analyzed using scanning electron microscopy and Raman spectroscopy, and the results showed that MoO₃ produced the most compact char, with the smallest and most organized carbonaceous microstructures. © 2017 Society of Chemical Industry     

-15℃下Na+， K+， Mg2+//Cl-， NO3-， SO42——H2O体系相平衡研究

新疆卤水硝酸盐矿主要含有Na⁺、K⁺、Mg²⁺、Cl^-、NO₃^-、SO₄^2-六种离子，属于高元复杂体系，其合理利用和开发需要不同温度下的相平衡研究作为理论支撑。采用等温溶解平衡法，对Na⁺， K⁺， Mg²⁺//Cl^-， NO₃^-， SO₄^2--H₂O体系在-15℃、NaCl·2H₂O饱和条件下的相平衡进行了研究，并构建了相图。相图中有六个零变量点和八个两盐结晶区，只存在一种复盐KCl·MgCl₂·6H₂O。八个两盐结晶区，分别对应于NaCl·2H₂O+Na₂SO₄·10H₂O、NaCl·2H₂O+NaNO₃、NaCl·2H₂O+KCl、NaCl·2H₂O+KNO₃、NaCl·2H₂O+MgSO₄·7H₂O、NaCl·2H₂O+MgCl₂·8H₂O、NaCl·2H₂O+Mg(NO₃)₂·6H₂O和NaCl·2H₂O+KCl·MgCl₂·6H₂O，其中NaCl·2H₂O+Na₂SO₄·10H₂O共晶区最大，在低温时，硫酸钠的溶解度最小，降温过程中较易结晶析出。与该体系在25℃下的相图相比，复盐种类减少5种，零变量点减少19个，相关系得以极大简化。