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现代物理教学应持的基本观念 总被引:1,自引:0,他引:1
一、教学理论的继承性80年代以来风靡一些发达国家的“发现教学、合作教学、个性教学”等教学模式应蕴而生。可以说现代教学理论的发展为现代物理教学提供了丰富的理性思路和实践框架,这就要求我们不断用现代教育理论丰富自己、武装自己,不断从现代教育理论中吸取营养、取其精华、为我所用、继承发展,树立新观念、掌握新理论、建立新模式,为现代物理教学改革注入新活力。二、教学目标的全面性现代物理教学越来越重视和追求教学的认知、情感和技能等各种目标的协同达成,强调知、情、意、行的有机统一和均衡发展。教学是达成教学目标的基本途径。 相似文献
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Artificial Neural Networks Applied to the Quantitative Structure-Activity Relationship Study of Para-substituted Phenols 总被引:1,自引:0,他引:1
The artificial neural network (ANN) model with back-propagation of error is used to study the quantitative structure-activity relationship of para-substituted phenol derivatives between the biological activity and the physicochemical property parameters. Network parameters are optimized, and an empirical rule for dynamically adjusting the network's learning rate is proposed to improve the network's performance. The results showthat the three-layer ANN model gives satisfactory performance, with f(x)=1/(1+exp(-x)) as the network node's input-output transformation function and the number of hidden nodes 10. The network gives the mean square error (rose) of 0.036 when predicting the biological activity of 26 para-substituted phenol derivatives. This result compares favourably with that obtained by the conventional methods. 相似文献
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