目的系统评价我国研究生与导师互动(导学互动)影响因素的质性研究,为强化护理研究生导学互动提供参考。方法检索PubMed、Web of Science、JSTOR、ProQuest和中国知网、万方数据、维普数据库有关我国导学互动影响因素质性研究的文献,检...目的系统评价我国研究生与导师互动(导学互动)影响因素的质性研究,为强化护理研究生导学互动提供参考。方法检索PubMed、Web of Science、JSTOR、ProQuest和中国知网、万方数据、维普数据库有关我国导学互动影响因素质性研究的文献,检索时限均为建库至2023年8月,采用澳大利亚JBI循证卫生保健中心(2016)质性研究质量评价标准进行文献质量评价,采用Meta整合方法对结果进行整合分析。结果共纳入14项研究,提炼36个研究结果,归纳成10个新的类别,综合成3个整合结果:导师个体因素,包括导师动机、能力及人格特质;研究生个体因素,包括研究生动机、能力、人格特质和社会关系;外界环境因素,包括科研团队因素、学校制度因素以及社会因素。结论我国研究生教育导师与学生互动受到导师、学生及外界环境的影响,需从多方面着手干预,以形成和谐导学关系,保障护理研究生教育质量。展开更多
Inertinite-rich coal is widely distributed in the Ordos Basin,represented by the No.2 coal seam of the Middle Jurassic Yan'an Formation.This paper combined coal petrology and geochemistry to analyze the origin of ...Inertinite-rich coal is widely distributed in the Ordos Basin,represented by the No.2 coal seam of the Middle Jurassic Yan'an Formation.This paper combined coal petrology and geochemistry to analyze the origin of inertinite,changes in the coal-forming environment and control characteristics of wildfire.Research has shown that there are two forms of inertinite sources in the study area.Alongside typical fusinization,wildfire events also play a substantial role in inertinite formation.There are significant fluctuations in the coal-forming environment of samples at different depths.Coal samples were formed in dry forest swamp with low water levels and strong oxidation,which have a high inertinite content,and the samples formed in wet forest swamp and limnic showed low inertinite content.Conversely,the inertinite content of different origins does not fully correspond to the depositional environment characterized by dryness and oxidation.Nonpyrogenic inertinites were significantly influenced by climatic conditions,while pyrofusinite was not entirely controlled by climatic conditions but rather directly impacted by wildfire events.The high oxygen level was the main factor causing widespread wildfire events.Overall,the combination of wildfire activity and oxidation generates a high content of inertinite in the Middle Jurassic coal of the Ordos Basin.展开更多
Toppling failure of rock mass/soil slope is an important geological and environmental problem.Clarifying its failure mechanism under different conditions has great significance in engineering.The toppling failure of a...Toppling failure of rock mass/soil slope is an important geological and environmental problem.Clarifying its failure mechanism under different conditions has great significance in engineering.The toppling failure of a cutting slope occurred in a hydropower station in Kyushu,Japan illustrates that the joint characteristic played a significant role in the occurrence of rock slope tipping failure.Thus,in order to consider the mechanical properties of jointed rock mass and the influence of geometric conditions,a simplified analytical approach based on the limit equilibrium method for modeling the flexural toppling of cut rock slopes is proposed to consider the influence of the mechanical properties and geometry condition of jointed rock mass.The theoretical solution is compared with the numerical solution taking Kyushu Hydropower Station in Japan as one case,and it is found that the theoretical solution obtained by the simplified analysis method is consistent with the numerical analytical solution,thus verifying the accuracy of the simplified method.Meanwhile,the Goodman-Bray approach conventionally used in engineering practice is improved according to the analytical results.The results show that the allowable slope angle may be obtained by the improved Goodman-Bray approach considering the joint spacing,the joint frictional angle and the tensile strength of rock mass together.展开更多
文摘目的系统评价我国研究生与导师互动(导学互动)影响因素的质性研究,为强化护理研究生导学互动提供参考。方法检索PubMed、Web of Science、JSTOR、ProQuest和中国知网、万方数据、维普数据库有关我国导学互动影响因素质性研究的文献,检索时限均为建库至2023年8月,采用澳大利亚JBI循证卫生保健中心(2016)质性研究质量评价标准进行文献质量评价,采用Meta整合方法对结果进行整合分析。结果共纳入14项研究,提炼36个研究结果,归纳成10个新的类别,综合成3个整合结果:导师个体因素,包括导师动机、能力及人格特质;研究生个体因素,包括研究生动机、能力、人格特质和社会关系;外界环境因素,包括科研团队因素、学校制度因素以及社会因素。结论我国研究生教育导师与学生互动受到导师、学生及外界环境的影响,需从多方面着手干预,以形成和谐导学关系,保障护理研究生教育质量。
基金financially supported by the National Natural Science Foundation of China(Grant No.42272209)the Natural Science Basic Research Program of Shaanxi(Grant No.2021JLM-12)the CNPC Major Science and Technology Project(Grant No.2021DJ3805)。
文摘Inertinite-rich coal is widely distributed in the Ordos Basin,represented by the No.2 coal seam of the Middle Jurassic Yan'an Formation.This paper combined coal petrology and geochemistry to analyze the origin of inertinite,changes in the coal-forming environment and control characteristics of wildfire.Research has shown that there are two forms of inertinite sources in the study area.Alongside typical fusinization,wildfire events also play a substantial role in inertinite formation.There are significant fluctuations in the coal-forming environment of samples at different depths.Coal samples were formed in dry forest swamp with low water levels and strong oxidation,which have a high inertinite content,and the samples formed in wet forest swamp and limnic showed low inertinite content.Conversely,the inertinite content of different origins does not fully correspond to the depositional environment characterized by dryness and oxidation.Nonpyrogenic inertinites were significantly influenced by climatic conditions,while pyrofusinite was not entirely controlled by climatic conditions but rather directly impacted by wildfire events.The high oxygen level was the main factor causing widespread wildfire events.Overall,the combination of wildfire activity and oxidation generates a high content of inertinite in the Middle Jurassic coal of the Ordos Basin.
基金Project(52109132)supported by the National Natural Science Foundation of ChinaProject(ZR2020QE270)supported by the Natural Science Foundation of Shandong Province,China+1 种基金Project(JMDPC202204)supported by State Key Laboratory of Strata Intelligent Control,Green Mining Co-founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and Technology,China。
文摘Toppling failure of rock mass/soil slope is an important geological and environmental problem.Clarifying its failure mechanism under different conditions has great significance in engineering.The toppling failure of a cutting slope occurred in a hydropower station in Kyushu,Japan illustrates that the joint characteristic played a significant role in the occurrence of rock slope tipping failure.Thus,in order to consider the mechanical properties of jointed rock mass and the influence of geometric conditions,a simplified analytical approach based on the limit equilibrium method for modeling the flexural toppling of cut rock slopes is proposed to consider the influence of the mechanical properties and geometry condition of jointed rock mass.The theoretical solution is compared with the numerical solution taking Kyushu Hydropower Station in Japan as one case,and it is found that the theoretical solution obtained by the simplified analysis method is consistent with the numerical analytical solution,thus verifying the accuracy of the simplified method.Meanwhile,the Goodman-Bray approach conventionally used in engineering practice is improved according to the analytical results.The results show that the allowable slope angle may be obtained by the improved Goodman-Bray approach considering the joint spacing,the joint frictional angle and the tensile strength of rock mass together.
