物理实验教学——培养学生物理学习能力的有效抓手

初中物理教学应很好地注重实验教学,切实加强物理实验教学.物理实验教学可以激发学生的学习兴趣,培养学生创造性思维能力,提高学生的综合、分析能力,做好物理课外小实验,可以促进学生对教学内容的学习,画图、识图,可以发展学生的想象能力.总之,物理实验教学是提升学生物理学习能力的有效抓手.     

重视物理实验提高教学效果

物理实验在物理教学中占有重要地位,只有认真搞好实验教学,才能提高物理教学效果.本文从激发学习兴趣、做好指导工作和探索实验教法三个方面来强调实验教学在物理教学中的重要作用.     

重视物理实验提高教学效果

物理实验在物理教学中占有重要地位,只有认真搞好实验教学,才能提高物理教学效果.本文从激发学习兴趣、做好指导工作和探索实验教法三个方面来强调实验教学在物理教学中的重要作用.     

Matlab用于大学物理实验教学的探索

本文通过对高校物理实验教学现状的分析，以实例阐述了利用Matlab进行物理实验教学的优势。Matlab强大的计算与图形功能以及由它扩展的动态仿真环境，不仅给物理及物理实验教学带来了极大的方便．同时也使物理实验变得更加生动有趣。Matlab走入物理实验，为教学改革提供了广阔的前景。     

农村中学物理实验教学现状的调查研究

对农村中学物理实验教学的现状和实验课程资源的开发利用情况进行了调查.结果显示:实验教学条件能部分地满足物理实验教学的要求,但与物理课程标准尚有一定的差距;大部分教师缺乏开发物理实验课程资源的意识和能力;现有实验资源没有得到充分利用.这些都制约了物理实验教学水平和效果的提高,对此针对性地提出了中学物理实验教学的改进措施.     

在物理实验课上如何合理利用多媒体教学技术

物理实验教学中合理地利用多媒体教学技术,可以优化实验教学过程,提高教学效果,使学生接受和掌握更多的知识.     

如何通过加强物理实验教学来培养学生的能力

物理是一门以实验为基础的学科，实验是物理知识的源泉，所有的物理知识，包括物理概念、定律和理论都是在实验基础上建立起来的。物理教学也必须以实验为基础，下面就如何通过加强物理实验教学来培养学生的能力来谈几点自己的看法。     

利用物理实验培养学生的综合能力

物理是一门以实验为基础的自然科学,实验在物理教学中的地位和实验本身的特点,决定了它在物理教学中能起到重要的作用.本文从五个方面阐述物理实验在物理教学中的作用:实验教学可以培养学生的兴趣和激发学生的求知欲;实验教学可以将复杂问题简单化;实验教学可以培养学生的各种能力;实验教学可以训练学生的科学方法;实验教学可以培养学生良好的科学素质.     

浅谈实验在初中物理教学中的作用

实验可以培养学生的实验思维、实验技能和试验能力,促使学生更深刻更牢固地掌握物理规律,激励学生热爱科学,培养科学素质,建立正确的世界观.因此物理实验在整个物理教学中起着非常重要的作用,使学生掌握知识与能力发展的不可缺少的一个重要环节.如何来加大实验教学力度,改进实验教学、提高教学效果,可以从以下几点入手:     

简谈以生活实例导入初中物理课堂教学

将生动丰富的生活实例导入抽象的物理教学,是提高初中物理课堂教学效率的有效途径.本文结合物理教学实例,从创设生活化教学情境、教学过程中的生活实例引用及生活化实验教学三方面就此问题作了深入的阐述.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.