对运动技术力学佯谬问题的探讨

结合运动技术实例,分析了一些运动技术中存在的力学佯谬现象,这是我们片面地使用经典力学原理分析运动技术给我们造成的错觉。要正确地认识这些力学佯谬现象,应当从多个学科角度出发,结合人体这个复杂巨系统的特点,综合分析运动技术的生物力学原理。     

积极顺应时代需要 加快培养创新人才

要培养和造就适应时代发展需要的创新人才，就必须更新教育观念，确立以创新为核心的教育思想，突破旧的教学模式，构建以培养人的创新精神和创新能力为基本价值取向的新的教育体系。本文结合《地基有基础》课程教学实践，探讨顺应时代发展需要、树立创新教育思想、实施创新教学、培养创新人才的做法。     

《力热实验》课程考核方式的探索

以能力培养为目的．注重过程，将考核贯穿于力热实验教学的整个过程．全面考核，多元评价，科学、合理地评定成绩．     

高职《土力学与地基基础》教学改革与实践

针对高职教育特点及教学现状,就《土力学与地基基础》课程,在教学内容、教学方法、实践环节及考核方式等方面进行了一系列的改革探索,谈了一些具体做法和设想,具有一定的实用性和可操作性。     

湘中紫色土丘岗区农业生态工程优化模式的效益分析--以衡南县谭子山镇工联村为例

湘中衡阳盆地紫色土丘陵岗地分布广泛，这里普遍植被稀疏，水土流失严重，部分地区甚至基岩裸露，土地荒芜，呈现红色荒漠化现象。本文以衡南县工联村为例，针对湘中紫色土丘岗区综合开发项目示范区的农业生态工程优化模式，采用层次分析法和对比分析法，分别从生态效益、经济效益、社会效益和综合效益等方面进行1990年与2001年的对比分析。结果显示，工联村农业生态经济系统的生态效益、经济效益和社会效益指数均有显著提高，并已由非生态农业阶段发展进入到良性生态农业阶段，为湘中紫色土丘陵综合治理、农业生态工程建设和农业结构调整提供了一个良好的示范。     

基于IEET工程教育认证背景下的土力学实验教学方法探索

工程教育认证制度是国际通行的质量保证办法,是工程师制度改革的基础,是未来工程师能力水平的保证。IEET推动的工程教育认证是一项非政府的审查机制,主旨为“以学生学习成果为导向(outcome-based),确保专业的教育品质”。那么结合现代信息化教学技术——微课的理念,本文主要探索土力学实验教学新模式,设计出符合创新人才培养目标要求的土力学实验课程教学内容,期待能为高等学校相关专业土力学实验课程任课教师准备实验教学内容提供参考,同时也为同行开展相关实验及学生设计创新实验提供借鉴。     

Investigation of iodine concentration in salt,water and soil along the coast of Zhejiang,China

Objective: We aim to describe the environment iodine concentration in salt, water and soil along Zhejiang Province coast in the China foreland. It will be helpful for us to judge whether this area is insufficient in iodine and universal iodized salt is necessary or not. Methods: We collected iodized salt samples, drinking water samples (tap water in the towns, and well water or spring water in the villages), water samples from different sources (ditches, lakes, rivers) and soil samples through random sampling in June, 2005. Salt, water and soil iodine was detected by arsenic-cerium redox method. Statistical analysis was expressed as mean±SEMby Windows SPSS 13.0. Results: (1) The iodine concentration in salt was 27.9±4.33 mg/kg (n=108). (2) Seventy-five water samples were collected. The water iodine value was 0.6～84.8 μg/L (mean of 11.66 μg/L). The watershed along the Qiantang River has significantly higher iodine content than the water in Lin'an in mountain area (P＜0.01). The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (n=34), 23.59±27.74 μg/L (n=19)and 12.72±10.72 μg/L (n=22) respectively. This indicated that among environmental water sources, the ditch iodine content was the highest with river water iodine being the lowest (P＜0.01). (3) Soil iodine value was 0.11～2.93 mg/kg (mean of 1.32 mg/kg).Though there was no statistical difference of soil iodine in different districts (P=0.131), soil iodine content correlated positively with water iodine content. Conclusion: Iodine concentration in salt accords with national policy of adding iodine in salt. Foreland has more iodine in water than mountain area. The data reflected that water and soil iodine in foreland area was not high, which suggests universal iodized salt should be necessary. Environment iodine has relatively close association with pollution.     

Land degradation,government subsidy,and smallholders’ conservation decision: the case of the loess plateau in China

Land degradation is one of the severe environmental problems in China. In order to combat land degradation, a soil conservation program was introduced since 2000 to reduce soil erosion by converting slope-cultivated land into forestry and pasture. This paper represents the first systematic attempt to investigate the impact of the soil conservation program on land degradation in the loess plateau. The results indicate that the soil conservation program to convert slope fields into forest or pasture is an effective way to combat soil erosion. However, a subsidy that is higher than profit of land use activity of slope fields before their conversion into forest and pasture is needed to encourage farmers to join the conservation program. A policy measure to encourage and assist farmers to develop sedentary livestock by using crops produced from fields as well as fodder and forage grass from the converted slope fields might contribute to combat soil erosion. Increase in off-farm job opportunities may encourage households to reduce cultivation in slope fields. That implies a policy measure to encourage rural urbanization might contribute to combat soil erosion.     

“材料力学”水平冲击问题的教学思考

在课堂教学中发现,学生难以理解在被冲击物的水平方向上施加冲击物的重力来计算动荷因数。本文研究了不同水平静荷载的施加对冲击问题的影响,推导出水平冲击问题求解的通用公式,证明水平冲击问题与静荷载的施加方式及大小无关。若采用动荷因数法,需选择冲击物自身重力作为被冲击物的水平静载,才可得到教材中的结果。结合国外材料力学教材,介绍了水平冲击问题的另一种求解方法,拓宽了读者求解水平冲击的思路,并给出相应的教学建议。     

原子分子物理的研究

介绍了原子分子物理学的发展概况,评述了其学科地位及目前主要的研究内容和发展方向,对原子结构理论的研究方法进行了较为系统的总结,阐述了原子结构理论新的领域和近几年取得的成果。指出我们所做的工作是以Breit-Pauli哈密顿的球张量形式为基础,借助不可约张量理论,建立了计算多电子原子能量的相对修正的一种解析理论。最后对原子分子物理理论未来的发展提出了自己的观点。