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河北某低品位钴镍矿可选性试验研究

矿冶工程 2024年第2期44卷 38-42页

作者：田江涛张凯熙葛阳阳齐向红王昕王素河北省地质实验测试中心河北保定071051 河北省矿产资源与生态环境监测重点实验室河北保定071051

对河北某低品位钴镍矿进行了选矿试验研究,确定采用阶段磨矿、先浮硫化矿、后硫化浮选氧化矿的异步浮选流程,通过组合药剂抑制矿泥、再磨强化硫化效果等手段,最终得到钴品位2.00%、镍品位3.90%的硫化钴镍精矿和钴品位1.47%、镍品位2.73... 详细信息

对河北某低品位钴镍矿进行了选矿试验研究,确定采用阶段磨矿、先浮硫化矿、后硫化浮选氧化矿的异步浮选流程,通过组合药剂抑制矿泥、再磨强化硫化效果等手段,最终得到钴品位2.00%、镍品位3.90%的硫化钴镍精矿和钴品位1.47%、镍品位2.73%的氧化钴镍精矿,钴总回收率达到了77.61%,镍总回收率达到了79.20%。实现了钴和镍的初步富集与回收,为钴和镍的进一步提纯奠定了基础。

关键词：钴镍矿异步浮选氧化矿硫化浮选组合抑制剂再磨镍钴

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某伴生银镉铟高硫铜锌矿低碱度选矿试验研究

中国矿业 2024年第8期33卷 201-208页

作者：葛阳阳张凯熙田江涛孟建卫王素危刚路峰河北省地质实验测试中心河北保定071052 河北省矿产资源与生态环境监测重点实验室河北保定071052

针对某含铜1.13%、锌1.98%、硫17.85%、银71 g/t、镉90 g/t、铟21 g/t,目的矿物主要为黄铜矿、闪锌矿、黄铁矿的高硫铜锌矿,进行了组合抑制剂低碱度浮选回收黄铜矿、闪锌矿和重选回收黄铁矿试验。试验结果表明:在磨矿细度−0.074 mm占90... 详细信息

针对某含铜1.13%、锌1.98%、硫17.85%、银71 g/t、镉90 g/t、铟21 g/t,目的矿物主要为黄铜矿、闪锌矿、黄铁矿的高硫铜锌矿,进行了组合抑制剂低碱度浮选回收黄铜矿、闪锌矿和重选回收黄铁矿试验。试验结果表明:在磨矿细度−0.074 mm占90%条件下,铜浮选作业采用氧化钙+硫化钠抑制黄铁矿、硫酸锌+焦亚硫酸钠抑制锌矿物,锌浮选作业采用腐殖酸钠+氧化钙抑制黄铁矿,获得铜品位23.59%、铜回收率92.85%,含银、镉、铟分别为328 g/t、228 g/t、142 g/t的铜精矿;锌品位45.81%、锌回收率80.60%,含银、镉、铟分别为796 g/t、2000 g/t、287 g/t的锌精矿;摇床试验获得硫品位42.34%、作业回收率68.04%的硫精矿;黄铁矿组合抑制剂发挥协同作用减少了氧化钙用量,浮选pH值降至10以下。研究成果为该类型矿石的工业开发奠定了基础。

关键词：低碱度高硫组合药剂铜锌矿

NONLINEAR ELECTRICAL BREAKDOWN-OF POLYMER DIELECTRIC MATERIALS UNDER MICROWAVE CONDITIONS

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NONLINEAR ELECTRICAL BREAKDOWN-OF POLYMER DIELECTRIC MATERIA...

1998 International Conference on Microwave and Millimeter Wave Technology

作者： zhang kaixi Department of Physics Hebei University

ISBN: (纸本)0780343085

＜正＞In this paper,using nonlinear Schrodinger equation and Continuum Approximation Method,the basic equations defining the motion of an electron in polymer molecular chain excited by microwave radiation have been *** solutions of the equations and the energy of the polymer system have been *** result shows that the interaction of an electron with chain deformation stabilizes its motion （quasi-superconducting state）.For polyisobutene radiated by microwave in constant intensity,calculation is in agreement with experimental measurement for nonlinear breakdown *** would be important to seek the cause of a decrease in the breakdown voltage for polymer materials under radiation conditions.

关键词： polymers dielectric materials organic insulating materials Schrodinger equation electric breakdown radiation effects nonlinear electrical breakdown polymer dielectric materials microwave conditions nonlinear Schrodinger equation continuum approximation method electron motion polymer molecular chain microwave radiation excitation chain deformation quasi-superconducting state polyisobutene nonlinear breakdown voltage

DYNAMIC CHARACTERISTICS OF AXIALLY SYMMETRIC SUPERSONIC FLOW UNDER MICROWAVE CONDITIONS

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DYNAMIC CHARACTERISTICS OF AXIALLY SYMMETRIC SUPERSONIC FLOW...

2002 3rd International Conference on Microwave and Millimeter Wave Technology

作者： Zhao Qingxun Ding Wenge zhang kaixi College of Physics Science and Technology Hebei University

ISBN: (纸本)078037486X

＜正＞Using supersonic dynamic and Onsager potential transfer differential equation of irreversible process thermodynamic,dynamic characteristics of axially symmetric supersonic flow radiated by microwave beam has been studied *** results corresponding to this research are relatively satisfied in comparison with experimental *** is useful to study parameters of the plasma by ultrasonic method for the plasma diagnostics.

关键词： irreversible thermodynamics supersonic flow axial symmetry plasma diagnostics plasma interactions plasma radiofrequency heating microwave beam radiated axially symmetric supersonic flows supersonic dynamics Onsager potential transfer differential equation irreversible process thermodynamics supersonic flow dynamic characteristics ultrasonic plasma parameter study method plasma diagnostics plasma interactions

Classification and Prediction on Rural Property Mortgage Data with Three Data Mining Methods

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Journal of Software Engineering and Applications 2018年第7期11卷 348-361页

作者： kaixi zhang Yingpeng Hu Yanghui Wu School of Science Northwest A&F University Yangling China

The Farmers Property Mortgage Policy is a strategic financial policy in western China, a relatively underdeveloped region. Many contradictions and conflicts exist in the process between the strong demand for the loans by farmers and the strict risk control by the financial institutions. The rural finance corporations should use scientific analysis and investigation of the potential households for overall evaluation of the customers. These include historical credit rating, present family situation, and other related information. Three different data mining methods were applied in this paper to the specifically-collected household data. The objective was to study which factor could be the most important in determining loan demand for households, and in the meanwhile, to classify and predict the possibility of loan demand for the potential customers. The results obtained from the three methods indicated the similar outputs, income level, land area, the way of loan, and the understanding of policy were four main factors which decided the probability of one specific farmer applying for a credit loan. The results also embodied the difference within the three methods for classifying and predicting the loan anticipation for the testing households. The artificial neural network model had the highest accuracy of 91.4 which is better than the other two methods.

关键词： Rural Property Mortgage Bayesian Network Artificial Neural Network Logistic Regression Classification and Prediction

HEATING OF POLYMER MATERIALS WITHOUT DISINTEGRATION UNDER MICROWAVE RADIATION

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HEATING OF POLYMER MATERIALS WITHOUT DISINTEGRATION UNDER MI...

2000 2nd International Conference on Microwave and Millimeter Wave Technology

作者： zhang kaixi Zhao Qingxun Department of Physics Hebei University

＜正＞Using Onsager potential transfer differential equation of irreversible process thermodynamics, the nonlinear microwave heating of polymer materials by microwave beam has calculated *** results corresponding to t...

关键词：

THE THERMAL DISINTEGRATION OF POLYMER MATERIALS UNDER THE EFFECT OF MICROWAVE RADIATION

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THE THERMAL DISINTEGRATION OF POLYMER MATERIALS UNDER THE EF...

2000 2nd International Conference on Microwave and Millimeter Wave Technology

作者： zhang kaixi Ding Wenge Department of Physics Hebei University

＜正＞According to Onsager potential transfer differential equation of irreversible process thermodynamics,the transfer potential of polymer materials radiated by microwave has been studied and the nonlinear Onsager potential in the materials is *** results of this paper indicate that the generally used method of varible separation is not applicable in solving this problem so the method of limited integation variations is used,and the calculating corresponding to microwave is relatively satisfied in comparison to the experimental measurement.

关键词：

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两类含参数的调和类数求和公式

大连交通大学学报 2023年第3期44卷 113-116页

作者：王晓元张凯茜大连交通大学理学院辽宁大连116028

利用Abel分部求和引理研究两类含有双参数的调和类数求和公式。通过对两个参数进行特殊选取,获得一些无理数π、Apéry常数ζ(3)、Catalan常数G以及ln2的无穷级数表达式。

关键词：调和数调和类数 Abel分部求和引理黎曼Zeta函数

供应链金融风险管理研究——基于中小企业融资视角

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金融发展研究 2020年第10期 45-51页

作者：郑昱张凯夕中国人民银行济南分行营业管理部山东济南250021 上海财经大学上海200433

供应链金融整合了物流、信息流、资金流,在缓解中小企业融资过程中面临难题的同时,也对商业银行信用风险管理提出了更高要求。本文基于济南实践分析了供应链金融融资模式及风险点,在此基础上,提出了一种更为完善的风险评价指标体系,并... 详细信息

供应链金融整合了物流、信息流、资金流,在缓解中小企业融资过程中面临难题的同时,也对商业银行信用风险管理提出了更高要求。本文基于济南实践分析了供应链金融融资模式及风险点,在此基础上,提出了一种更为完善的风险评价指标体系,并运用因子分析和Logistic模型进行实证研究发现,在多维度采集中小企业数据的基础上,关注供应链稳定程度及核心企业特点,提高商业银行全流程风险监控水平,有利于供应链金融健康发展。

关键词：供应链金融风险评价履约概率