Potential’s fluctuation of rust preventing oil film during its degradation was studied using wirebeam electrode. Being non-destructive and simple, potential measurement is a very repetitive method. Otherelectrochemic...Potential’s fluctuation of rust preventing oil film during its degradation was studied using wirebeam electrode. Being non-destructive and simple, potential measurement is a very repetitive method. Otherelectrochemical testing method, e. g., polarization resistance, can breakdown the integrity of oil coating byDC current; EIS is time consuming. As a special electrochemical sensor, wire beam electrode contains 101wires of mild steel wires, and it is helpful to improve the reproducibility of electrochemical test evidently.Using this electrode, the electrochemical parameters and their distribution which was related to under filmcorrosion process are measured directly so as to describe potential’s fluctuation of rust preventing oil film. Itis pointed out that there is potential’s fluctuation on rust preventing oil film during its degradation, and thischaracteristic has direct effect on the self-repairing ability of rust preventing oil film. However, for the uncoated metal electrode and base oil film, there is no such behavior. It is also pointed out that inhibitors in theoil film have direct effect on its self-repairing ability.展开更多
Metal mineral resources play an indispensable role in the development of the national economy.Dynamic disasters in underground metal mines seriously threaten mining safety,which are major scientific and technological ...Metal mineral resources play an indispensable role in the development of the national economy.Dynamic disasters in underground metal mines seriously threaten mining safety,which are major scientific and technological problems to be solved urgently.In this article,the occurrence status and grand challenges of some typical dynamic disasters involving roof falling,spalling,collapse,large deformation,rockburst,surface subsidence,and water inrush in metal mines in China are systematically presented,the characteristics of mining-induced dynamic disasters are analyzed,the examples of dynamic disasters occurring in some metal mines in China are summarized,the occurrence mechanism,monitoring and early warning methods,and prevention and control techniques of these disasters are highlighted,and some new opinions,suggestions,and solutions are proposed simultaneously.Moreover,some shortcomings in current disaster research are pointed out,and the direction of efforts to improve the prevention and control level of dynamic disasters in China’s metal mines in the future is prospected.The integration of forward-looking key innovative theories and technologies in the abovementioned aspects will greatly enhance the cognitive level of disaster prevention and mitigation in China’s metal mining industry and achieve a significant shift from passive disaster relief to active disaster prevention.展开更多
目的:查找、筛选、描述和分析国内外医防协同评价指标,为构建适合国内医防协同评价体系提供理论依据和参考。方法:通过检索Web of Science核心库和中国知网从建库到2024年5月31日关于医防协同评价指标的相关文献,制定纳入和排除标准筛...目的:查找、筛选、描述和分析国内外医防协同评价指标,为构建适合国内医防协同评价体系提供理论依据和参考。方法:通过检索Web of Science核心库和中国知网从建库到2024年5月31日关于医防协同评价指标的相关文献,制定纳入和排除标准筛选文献,按研究问题提取、分析和总结数据,对评价指标进行归纳分析。结果:最终纳入文献32篇,中文文献15篇,外文文献17篇;涉及3个理论模型、6种指导框架、5种选取方法、6种赋权方法。Donabedian三维质量模型(6.25%)和耦合协调度模型(6.25%)是使用较多的理论模型,文献研究法(53.13%)和德尔菲法(34.38%)分别是较多的评价指标选取方法和赋权方法;一级指标主要分为组织构架、资源配置和服务质量3类,二级指标中出现频次较高的分别是管理系统、卫生信息系统和患者满意度。结论:目前国内外医防协同评价指标尚不统一,且实证研究较少。今后应该构建一个系统而科学的医防协同评价指标体系,并通过实证研究验证和推行,以促进人民健康和生活质量的提高。展开更多
文摘Potential’s fluctuation of rust preventing oil film during its degradation was studied using wirebeam electrode. Being non-destructive and simple, potential measurement is a very repetitive method. Otherelectrochemical testing method, e. g., polarization resistance, can breakdown the integrity of oil coating byDC current; EIS is time consuming. As a special electrochemical sensor, wire beam electrode contains 101wires of mild steel wires, and it is helpful to improve the reproducibility of electrochemical test evidently.Using this electrode, the electrochemical parameters and their distribution which was related to under filmcorrosion process are measured directly so as to describe potential’s fluctuation of rust preventing oil film. Itis pointed out that there is potential’s fluctuation on rust preventing oil film during its degradation, and thischaracteristic has direct effect on the self-repairing ability of rust preventing oil film. However, for the uncoated metal electrode and base oil film, there is no such behavior. It is also pointed out that inhibitors in theoil film have direct effect on its self-repairing ability.
基金Project(52204084)supported by the National Natural Science Foundation of ChinaProject(FRF-IDRY-GD22-002)supported by the Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities),China+2 种基金Project(QNXM20220009)supported by the Fundamental Research Funds for the Central Universities and the Youth Teacher International Exchange and Growth Program,ChinaProjects(2022YFC2905600,2022YFC3004601)supported by the National Key R&D Program of ChinaProject(2023XAGG0061)supported by the Science,Technology&Innovation Project of Xiongan New Area,China。
文摘Metal mineral resources play an indispensable role in the development of the national economy.Dynamic disasters in underground metal mines seriously threaten mining safety,which are major scientific and technological problems to be solved urgently.In this article,the occurrence status and grand challenges of some typical dynamic disasters involving roof falling,spalling,collapse,large deformation,rockburst,surface subsidence,and water inrush in metal mines in China are systematically presented,the characteristics of mining-induced dynamic disasters are analyzed,the examples of dynamic disasters occurring in some metal mines in China are summarized,the occurrence mechanism,monitoring and early warning methods,and prevention and control techniques of these disasters are highlighted,and some new opinions,suggestions,and solutions are proposed simultaneously.Moreover,some shortcomings in current disaster research are pointed out,and the direction of efforts to improve the prevention and control level of dynamic disasters in China’s metal mines in the future is prospected.The integration of forward-looking key innovative theories and technologies in the abovementioned aspects will greatly enhance the cognitive level of disaster prevention and mitigation in China’s metal mining industry and achieve a significant shift from passive disaster relief to active disaster prevention.
文摘目的:查找、筛选、描述和分析国内外医防协同评价指标,为构建适合国内医防协同评价体系提供理论依据和参考。方法:通过检索Web of Science核心库和中国知网从建库到2024年5月31日关于医防协同评价指标的相关文献,制定纳入和排除标准筛选文献,按研究问题提取、分析和总结数据,对评价指标进行归纳分析。结果:最终纳入文献32篇,中文文献15篇,外文文献17篇;涉及3个理论模型、6种指导框架、5种选取方法、6种赋权方法。Donabedian三维质量模型(6.25%)和耦合协调度模型(6.25%)是使用较多的理论模型,文献研究法(53.13%)和德尔菲法(34.38%)分别是较多的评价指标选取方法和赋权方法;一级指标主要分为组织构架、资源配置和服务质量3类,二级指标中出现频次较高的分别是管理系统、卫生信息系统和患者满意度。结论:目前国内外医防协同评价指标尚不统一,且实证研究较少。今后应该构建一个系统而科学的医防协同评价指标体系,并通过实证研究验证和推行,以促进人民健康和生活质量的提高。
