基于通用土壤流失方程（universal soil loss equation，USLE）、遥感和ArcGIS空间分析技术，通过合理选择USLE模型中各土壤侵蚀因子的计算方法，对广东省山区土壤侵蚀量进行了估算，并对山区土壤侵蚀随土地利用类型、土壤类型、坡度及...基于通用土壤流失方程（universal soil loss equation，USLE）、遥感和ArcGIS空间分析技术，通过合理选择USLE模型中各土壤侵蚀因子的计算方法，对广东省山区土壤侵蚀量进行了估算，并对山区土壤侵蚀随土地利用类型、土壤类型、坡度及海拔高度的分布特征进行了分析。结果表明，广东省山区2000年土壤侵蚀总量为1．23×10。t，年均侵蚀模数为1080t／（km。·a），侵蚀强度为轻度。不同土地利用类型中，旱地的侵蚀强度最高，达2055t／（km2·a），林地和草地的侵蚀模数较小，分别为908和932t／（km2·a）。不同坡度等级的土壤侵蚀特征表现为坡度越陡，侵蚀强度越大。不同海拔高度的侵蚀特征表现为在0～1600mNi度，侵蚀强度随海拔高度的升高而增大；海拔高于1600m时，侵蚀强度随海拔高度的升高而下降。展开更多
目的:通过实证干预的方法,探索正念认知疗法对医学生焦虑情绪的干预效果;方法:通过SAS焦虑自评量表筛选出40名焦虑分值大于50的医学生,按照随机化原则分成两组,分为实验组和对照组,一组20人。对照组学生不进行任何处理,实验组学生由专...目的:通过实证干预的方法,探索正念认知疗法对医学生焦虑情绪的干预效果;方法:通过SAS焦虑自评量表筛选出40名焦虑分值大于50的医学生,按照随机化原则分成两组,分为实验组和对照组,一组20人。对照组学生不进行任何处理,实验组学生由专业老师指导,进行为期8周的正念认知训练,一周练习1次,每次练习45分钟,有具体的主题和内容。8周练习结束后,再次通过SAS量表对两组被试的焦虑水平进行测量,检验正念认知疗法对医学生焦虑情绪的干预效果如何。结果:实验组学生在进行8周正念认知训练后,实验组的焦虑得分显著下降。结论:正念认知疗法对医学生焦虑情绪的干预效果显著。Purpose: To explore the effect of Mindfulness-Based Cognitive Therapy (MBCT) on the anxiety of medical students through empirical intervention methods. Method: Forty medical students with an anxiety score greater than 50, as measured by the Self-Rating Anxiety Scale (SAS), were randomly divided into two groups: an experimental group and a control group, with 20 students in each group. The control group did not receive any intervention, while the experimental group received an 8-week mindfulness-based cognitive training guided by a professional instructor, with one session per week, each lasting 45 minutes, and having specific themes and content. After the 8-week training, the anxiety levels of both groups were measured again using the SAS to test the effect of MBCT on the anxiety of medical students. Results: The anxiety scores of the experimental group significantly decreased after the 8-week MBCT training. Conclusion: Mindfulness-Based Cognitive Therapy has a significant intervention effect on the anxiety of medical students.展开更多
文摘基于通用土壤流失方程（universal soil loss equation，USLE）、遥感和ArcGIS空间分析技术，通过合理选择USLE模型中各土壤侵蚀因子的计算方法，对广东省山区土壤侵蚀量进行了估算，并对山区土壤侵蚀随土地利用类型、土壤类型、坡度及海拔高度的分布特征进行了分析。结果表明，广东省山区2000年土壤侵蚀总量为1．23×10。t，年均侵蚀模数为1080t／（km。·a），侵蚀强度为轻度。不同土地利用类型中，旱地的侵蚀强度最高，达2055t／（km2·a），林地和草地的侵蚀模数较小，分别为908和932t／（km2·a）。不同坡度等级的土壤侵蚀特征表现为坡度越陡，侵蚀强度越大。不同海拔高度的侵蚀特征表现为在0～1600mNi度，侵蚀强度随海拔高度的升高而增大；海拔高于1600m时，侵蚀强度随海拔高度的升高而下降。
文摘目的:通过实证干预的方法,探索正念认知疗法对医学生焦虑情绪的干预效果;方法:通过SAS焦虑自评量表筛选出40名焦虑分值大于50的医学生,按照随机化原则分成两组,分为实验组和对照组,一组20人。对照组学生不进行任何处理,实验组学生由专业老师指导,进行为期8周的正念认知训练,一周练习1次,每次练习45分钟,有具体的主题和内容。8周练习结束后,再次通过SAS量表对两组被试的焦虑水平进行测量,检验正念认知疗法对医学生焦虑情绪的干预效果如何。结果:实验组学生在进行8周正念认知训练后,实验组的焦虑得分显著下降。结论:正念认知疗法对医学生焦虑情绪的干预效果显著。Purpose: To explore the effect of Mindfulness-Based Cognitive Therapy (MBCT) on the anxiety of medical students through empirical intervention methods. Method: Forty medical students with an anxiety score greater than 50, as measured by the Self-Rating Anxiety Scale (SAS), were randomly divided into two groups: an experimental group and a control group, with 20 students in each group. The control group did not receive any intervention, while the experimental group received an 8-week mindfulness-based cognitive training guided by a professional instructor, with one session per week, each lasting 45 minutes, and having specific themes and content. After the 8-week training, the anxiety levels of both groups were measured again using the SAS to test the effect of MBCT on the anxiety of medical students. Results: The anxiety scores of the experimental group significantly decreased after the 8-week MBCT training. Conclusion: Mindfulness-Based Cognitive Therapy has a significant intervention effect on the anxiety of medical students.
