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小学语文教材的课后练习是课文的有机组成部分,它是编者精心设计的课程资源,语文教师要善于利用这一资源,科学安排教学内容,精心设计教学流程,有效开展教学活动,强化学生的读写训练,积淀学生的语文素养,提高语文教学的实效。 相似文献
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To analyze the use of upper limb support during paraplegic walking assisted by functional electrical stimulation （ FES）. a new dynamical measurement for handle reaction vector （HRV） applied by patient to walker was proposed. To avoid the discomfort of direct monitoring, the dynamometer system was designed based on 12 string-gauge bridges instrumented on a standard walker frame. The detailed positions of these bridges were determined according to the deformation distributions of the walker frame under different directional components of HRV. To adapt the system to quantitative and reliable measurement, a redundant-optimized technique was developed in calibration. The measurement accuracy, nonlinearity, and crosstalk of the designed system were investigated, which were better than 1.01%. 2.91%. and 3. 19% respectively. Clinical trials were done with 6 paraplegic subjects using the system and one case was given as the example of actual measurement. All experiment and clinical trial results show that this method is reliable and practicable. 相似文献
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Gait recognition is the key question of functional electrical stimulation (FES) system control for paraplegic walking. A new risk-tendency-graph (RTG) method was proposed to recognize the stability information in FES-assisted walking gait. The main instrument was a specialized walker dynamometer system based on a multi-channel strain-gauge bridge network fixed on the walker frame. During walking process, this system collected the reaction forces between patient's upper extremities and walker and converted them into RTG morphologic curves of dynamic gait stability in temporal and spatial domains. To demonstrate the potential usefulness of RTG, preliminary clinical trials were done with paraplegic patients. The gait stability levels of two walking cases with 4- and 12-week FES training from one subject were quantified (0.43 and 0.19) from the results of temporal and spatial RTG. Relevant instable phases in gait cycle and dangerous inclinations of patient's body during walking process were also brought forward. In conclusion, the new RTG method is practical for distinguishing more useful gait stability information for FES system control. 相似文献
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科学普及是国家和社会普及科学技术知识、弘扬科学精神、传播科学思想、倡导科学方法的活动,是实现创新发展的重要基础性工作。文章在深入学习习近平总书记关于科技创新和科学普及重要论述的基础上,基于科学传播“对话模型”,提出科普实践的“一体两翼”理念,并结合“科创中国-院士开讲”栏目的科普实践,分析了以中国科学院、中国工程院院士为代表的专家群体在参与不同平台科普实践的成效和经验,总结了“一体两翼”理念在指导和推动科学普及中的作用,最后提出以高质量科普产品引领科普实践进而服务创新发展的思考建议。 相似文献
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