1.学生分析本节课授课对象为九年级六班学生,该班从七年级开始一直由我带上来,学生们大部分英语基础较好,对英语很感兴趣。大部分学生思维活跃、表现欲望及合作精神在平时的课堂上都是很好的。根据这些特点,我采用活动式的教学方法和任...1.学生分析本节课授课对象为九年级六班学生,该班从七年级开始一直由我带上来,学生们大部分英语基础较好,对英语很感兴趣。大部分学生思维活跃、表现欲望及合作精神在平时的课堂上都是很好的。根据这些特点,我采用活动式的教学方法和任务型教学方法相结合的方式,充分利用小组合作活动,调动全班学生积极参与课堂活动,在师生互动、生生互动中完成教学任务和目标。2.教材分析本节课授课内容为人教版第九单元Section B 2a-展开更多
The N（2D） ＋ HD （v = 0, j = 0） reaction has been studied by a quantum time-dependent wave packet approach with a second-order split operator on the potential energy surface of Li et al. （Li Y, Yuan J, Chen M, Ma ...The N（2D） ＋ HD （v = 0, j = 0） reaction has been studied by a quantum time-dependent wave packet approach with a second-order split operator on the potential energy surface of Li et al. （Li Y, Yuan J, Chen M, Ma F and Sun M J. Comput. Chem. 34 1686）. The rovibrationally resolved reaction probability, vibrationally integral cross section, and differential cross section of the NH ＋ D and ND ＋ H channel are investigated at the state-to-state level of theory. The experimental data of the thermal rate constant of two output channels is very scare, but the sum of the two output channels is in excellent agreement with the experimental data which was reported by Umemoto et al. It may imply that the thermal rate constants of the two output channels are accurate and reliable.展开更多
A geophysical investigation was carried out in Kong, northern Côte d’Ivoire, to characterize the subsurface formations as part of a drinking water supply project. The study aimed to determine the seismic signatu...A geophysical investigation was carried out in Kong, northern Côte d’Ivoire, to characterize the subsurface formations as part of a drinking water supply project. The study aimed to determine the seismic signatures of the non-rippable layers and their depths to guarantee the stability of the Kong water reservoir. Based on the analysis of Vp velocity distribution, the subsoil in the study area is structured into rippable (300 - 1500 m/s), marginal (1500 - 2000 m/s) and non-rippable (>2000 m/s) zones with varying thicknesses. Correlation with core drilling results reveals that the rippable zones, located between 5 and 9 m depth, are associated with the superficial overburden and weathering products (clays and clayey sands), while the non-rippable zones correspond to the very dense granitic basement, located between 5 and 11 m depth according to 2D geoseismic sections.展开更多
板件回弹问题一直是学术界和工程界研究的热点,特别是在车身广泛应用高强度钢板之后回弹问题更加明显。针对汽车梁类件的造型特点,建立基于梁类件的回弹计算、回弹补偿及工艺型面修改的整套分析系统。在此系统中,先利用二维截面法和有...板件回弹问题一直是学术界和工程界研究的热点,特别是在车身广泛应用高强度钢板之后回弹问题更加明显。针对汽车梁类件的造型特点,建立基于梁类件的回弹计算、回弹补偿及工艺型面修改的整套分析系统。在此系统中,先利用二维截面法和有限元软件来计算零件各断面的回弹量,保证其回弹计算的精确性。再通过节点偏置算法来补偿各断面节点的回弹量,得到各断面回弹前和补偿后的节点信息。最后按照各个断面回弹前和补偿后的节点的一一对应关系,以原始型面为基础,运用型面整体变形(Shape global deformation,SGD)算法来对零件的工艺型面进行补偿修改。能够保证变形前后的型面整体拓扑关系的一致性,极大地保证曲面的质量和光顺程度,以便得到更为精确的回弹补偿型面。实践证明,该系统能够很大程度节省处理回弹问题的时间和精力,并且在补偿型面的修改精度上有较大的提高,回弹补偿更加准确。展开更多
文摘1.学生分析本节课授课对象为九年级六班学生,该班从七年级开始一直由我带上来,学生们大部分英语基础较好,对英语很感兴趣。大部分学生思维活跃、表现欲望及合作精神在平时的课堂上都是很好的。根据这些特点,我采用活动式的教学方法和任务型教学方法相结合的方式,充分利用小组合作活动,调动全班学生积极参与课堂活动,在师生互动、生生互动中完成教学任务和目标。2.教材分析本节课授课内容为人教版第九单元Section B 2a-
文摘The N（2D） ＋ HD （v = 0, j = 0） reaction has been studied by a quantum time-dependent wave packet approach with a second-order split operator on the potential energy surface of Li et al. （Li Y, Yuan J, Chen M, Ma F and Sun M J. Comput. Chem. 34 1686）. The rovibrationally resolved reaction probability, vibrationally integral cross section, and differential cross section of the NH ＋ D and ND ＋ H channel are investigated at the state-to-state level of theory. The experimental data of the thermal rate constant of two output channels is very scare, but the sum of the two output channels is in excellent agreement with the experimental data which was reported by Umemoto et al. It may imply that the thermal rate constants of the two output channels are accurate and reliable.
文摘A geophysical investigation was carried out in Kong, northern Côte d’Ivoire, to characterize the subsurface formations as part of a drinking water supply project. The study aimed to determine the seismic signatures of the non-rippable layers and their depths to guarantee the stability of the Kong water reservoir. Based on the analysis of Vp velocity distribution, the subsoil in the study area is structured into rippable (300 - 1500 m/s), marginal (1500 - 2000 m/s) and non-rippable (>2000 m/s) zones with varying thicknesses. Correlation with core drilling results reveals that the rippable zones, located between 5 and 9 m depth, are associated with the superficial overburden and weathering products (clays and clayey sands), while the non-rippable zones correspond to the very dense granitic basement, located between 5 and 11 m depth according to 2D geoseismic sections.
文摘板件回弹问题一直是学术界和工程界研究的热点,特别是在车身广泛应用高强度钢板之后回弹问题更加明显。针对汽车梁类件的造型特点,建立基于梁类件的回弹计算、回弹补偿及工艺型面修改的整套分析系统。在此系统中,先利用二维截面法和有限元软件来计算零件各断面的回弹量,保证其回弹计算的精确性。再通过节点偏置算法来补偿各断面节点的回弹量,得到各断面回弹前和补偿后的节点信息。最后按照各个断面回弹前和补偿后的节点的一一对应关系,以原始型面为基础,运用型面整体变形(Shape global deformation,SGD)算法来对零件的工艺型面进行补偿修改。能够保证变形前后的型面整体拓扑关系的一致性,极大地保证曲面的质量和光顺程度,以便得到更为精确的回弹补偿型面。实践证明,该系统能够很大程度节省处理回弹问题的时间和精力,并且在补偿型面的修改精度上有较大的提高,回弹补偿更加准确。
