普通高校化学专业大学物理教学内容改革的几点建议   总被引：1，自引：0，他引：1  

向荣 《巢湖学院学报》2011,13(3):146-148

改变《大学物理》在普通高校化学专业的教授内容范围。利用有限课时增加与化学直接相关的内容如热学、量子初步等。减少其他如电磁、光学内容。可以增加学生学习兴趣、增大课堂内容含量。  相似文献   

教育均衡与教育发展之间的悖论——对教育均衡问题的一种解读     

温丽萍 《教育发展研究》2011,(23)

教育发展与教育均衡之间存在着悖论:随着我国教育的改革与发展,教育的规模、投入与数量持续扩张,但教育均衡程度与水平却在下降,甚至出现一定程度的恶化。这不仅是理论与逻辑上的推论,也是为我国教育实践所证明了的事实。产生此悖论的原因在于,在我国教育发展的当前阶段,由于参考群体的变化,人们产生了普遍的相对剥夺感,教育均衡或公平感走低,从而引致整个社会对教育不均衡现象的广泛批评。教育发展与教育均衡之间也呈现出经济学上的倒U型曲线关系,这从另一个侧面证明了教育发展与教育均衡之间悖论存在的合理性。  相似文献   

从亲亲相隐到关系人犯罪——中国刑事法制的亲伦关怀考察     

董秀红 《南平师专学报》2011,30(4):72-76

刑事法制的亲伦关怀是一个国家法治文明和社会进步的体现。对中国亲亲相隐制度的历史考察和中外亲亲相隐制度的比较分析表明,中国本土的亲亲相隐制度以巩固家国秩序为宗旨,以维护亲伦礼教为目标,以规定个人义务为特征,但它毕竟契合人性,体现了对人情的尊重和对事理的顺应。中国现行刑事法制中的关系人犯罪立法非但无视亲伦关怀,甚至混淆了道德与法律、强加了法律义务。我国刑事法制应当承认容隐权,在刑法和刑事诉讼法中重构亲亲相隐制度。  相似文献   

Effect of gear ratio on peak power and time to peak power in BMX cyclists     

Lee P. Rylands  Simon J. Roberts  Howard T. Hurst 《European Journal of Sport Science》2017,17(2):127-131

The aim of this study was to ascertain if gear ratio selection would have an effect on peak power and time to peak power production in elite Bicycle Motocross (BMX) cyclists. Eight male elite BMX riders volunteered for the study. Each rider performed three, 10-s maximal sprints on an Olympic standard indoor BMX track. The riders’ bicycles were fitted with a portable SRM power meter. Each rider performed the three sprints using gear ratios of 41/16, 43/16 and 45/16 tooth. The results from the 41/16 and 45/16 gear ratios were compared to the current standard 43/16 gear ratio. Statistically, significant differences were found between the gear ratios for peak power (F(2,14)?=?6.448; p?=?.010) and peak torque (F(2,14)?=?4.777; p?=?.026), but no significant difference was found for time to peak power (F(2,14)?=?0.200; p?=?.821). When comparing gear ratios, the results showed a 45/16 gear ratio elicited the highest peak power,1658?±?221?W, compared to 1436?±?129?W and 1380?±?56?W, for the 43/16 and 41/16 ratios, respectively. The time to peak power showed a 41/16 tooth gear ratio attained peak power in ?0.01?s and a 45/16 in 0.22?s compared to the 43/16. The findings of this study suggest that gear ratio choice has a significant effect on peak power production, though time to peak power output is not significantly affected. Therefore, selecting a higher gear ratio results in riders attaining higher power outputs without reducing their start time.  相似文献   

相对柔韧性测量方法的简化     

徐玉明  周涛 《沈阳体育学院学报》2004,23(3):380-381

相对柔韧性测量方法的简化是体育测量与评价的重要问题。分别用线量法、比值法、简易法对实验对象进行评价,得出简易法效标有效性的结果,认为应该推广"简易法",以推动体育测量与评价方法的发展。  相似文献   

Impact absorption of tennis shoe-surface combinations     

S.?J.?DixonEmail author  V.?H.?Stiles 《Sports Engineering》2003,6(1):1-9

The aim of this study was to investigate, for typical shoes and surfaces used in tennis, the relative role of the shoe and surface in providing cushioning during running. Five test surfaces ranging from concrete to artificial turf were selected, together with two shoe models. Impact absorbing ability was assessed mechanically using drop test procedures and biomechanically using peak magnitude and rate of loading of impact force and peak in-shoe pressure data at the lateral heel. Differences in biomechanical variables between shoe-surface combinations were identified using a two-way ANOVA (p < 0.05). Mechanical test results were found to rank the surfaces in the same order regardless of the shoe model, suggesting that the surface is influential in providing cushioning. However, for all mechanical and biomechanical (p < 0.05) variables representing impact absorbing ability, it was found that the difference between shoes was markedly greater than the differences between surfaces. The peak heel pressure data were found to rank the surfaces in the same order as the mechanical tests, while impact force data were not as sensitive to the changes in surface. Correlations between mechanical and biomechanical impact absorption highlighted the importance of testing the shoe-surface combination in mechanical tests, rather than the surface alone. In conclusion, mechanical testing of the shoe-surface combination was found to provide a strong predictor of the impact absorbing ability during running if pressure data were used. In addition, for typical shoe-surface combinations in tennis, the shoe was found to have more potential than the surface to influence impact loading during running. Finally, in-shoe pressure data were found to be more sensitive than force plate data to changes in material cushioning.  相似文献   

浅论翻译的相对忠实性     

何春梅 《重庆职业技术学院学报》2007,16(3):106-107

翻译最基本的标准是忠实,可是意义和形式绝对忠实的译文是不存在的,在翻译实践中只能做到相对忠实。引起这一现象的主要因素包括语言差异、文化差异及译者本人。  相似文献   

日粮不同蛋氨酸水平对山鸡产蛋高峰期生产性能的影响   总被引：1，自引：0，他引：1  

GUO Hong-qi 《铜仁职业技术学院学报》2007,(3)

试验选取46～48周龄,健康无病、体型、体重基本一致的产蛋高峰期山鸡200只,随机均分为5组,1个对照组(Ⅴ组),4个试验组(Ⅰ、Ⅱ、Ⅲ、Ⅳ组),对照组蛋氨酸水平为0.22%,每组设10个重复,每个重复4只山鸡。每组基础日粮相同,蛋氨酸水平为0.22%,各组蛋氨酸添加量分别为0、0.05%、0.10%、0.15%、0.20%(每组添加量递增0.05%),试验期2个月。结果表明,日粮中添加适宜蛋氨酸水平不仅维持较长时间的产蛋高峰期和理想的产蛋峰值,显著地提高产蛋量和蛋重,而且还能提高饲料报酬和经济效益。试验结果表明:山鸡产蛋高峰期日粮蛋氨酸水平为0.37%。  相似文献   

异核两组分玻色-爱因斯坦凝聚体中矢量孤子的动力学性质     

冯雪霖  张素英 《雁北师范学院学报》2014,(2):33-38

本文基于准一维异核两组分玻色-爱因斯坦凝聚体的Gross-Pitaevskii（GP）方程,通过数值方法研究了亮-亮孤子和亮-暗孤子在不同的相对相位下的碰撞问题。没有外部势阱的束缚时,若亮-亮孤子的相对相位是π,它们会产生完全弹性碰撞,当相对相位是π2时亮-亮孤子对碰撞会产生能量的转移。若存在外部势阱,其相对相位为π时亮-亮孤子对产生了周期性碰撞,而相对相位是π2时亮-亮孤子对碰撞合并成一个孤子,并伴随有能量逃逸。对于亮-暗孤子,其相对相位为0或π时第一组分的亮-亮孤子对均发生了周期性碰撞,不同的是前者有一个碰撞点,后者则有两个碰撞点。进而,通过求解相应的Bogoliubov-de Gennes方程研究发现亮-亮孤子总是稳定的,而暗-暗孤子不稳定。  相似文献   

海上保险代位求偿权诉讼中第三人的抗辩理由     

李文湘 《上海海事大学学报》2007,28(4):89-94

为了从理论上解释《最高人民法院关于审理海上保险纠纷案件若干问题的规定》(简称《规定》)中有关海上保险代位求偿权的法律规定,通过分析代位求偿权的基本概念、第三人在代位求偿诉讼中常见的抗辩理由、第三人抗辩保险合同的法律依据、《规定》第14条对第三人抗辩保险合同的否定、《规定》第14条与《中华人民共和国海商法》第252条之间的关系,认为代位求偿权是一种仅仅存在于保险人与被保险人之间的基于海上保险合同的相对权利,因而第三人不能通过抗辩保险合同来抗辩保险人的代位求偿权,并且,第三人只能以对抗被保险人的理由来抗辩保险人的代位求偿权;阐述《规定》第14条给代位求偿权带来的影响.  相似文献