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高中生数学建模素养的评价研究
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作者 汪健 《上海课程教学研究》 2023年第6期69-74,共6页
为探索指向数学建模素养的评价设计,通过类比高考评价体系中“一核”“四层”“四翼”的设计,以新课标指出的数学建模六环节为抓手进行评价设计,结合教学实践进行案例研究,提出了对学生的“提出问题”“建模解模”“检验结果”等能力进... 为探索指向数学建模素养的评价设计,通过类比高考评价体系中“一核”“四层”“四翼”的设计,以新课标指出的数学建模六环节为抓手进行评价设计,结合教学实践进行案例研究,提出了对学生的“提出问题”“建模解模”“检验结果”等能力进行评价的一些可能途径。其中特别关注了新课标提出的满意原则和加分原则在评价中的具体表现。 展开更多
关键词 数学建模 教学评价 满意原则 加分原则
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A Modified Potential Method for Electrons Scattering Total Cross Section Calculations on Several Molecules at 30 ~ 5000 eV: CF4, CCl4, CFCl3, CF2Cl2, and CF3Cl
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作者 MA Heng SHI De-Heng +2 位作者 SUN Jin-Feng LIU Yu-Fang ZHU Zun-Lue 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第4期697-701,共5页
A complex optical model potential modified by the concept of bonded atom, which takes into consideration the overlapping effect of electron clouds between two atoms in a molecule, is employed to calculate the total cr... A complex optical model potential modified by the concept of bonded atom, which takes into consideration the overlapping effect of electron clouds between two atoms in a molecule, is employed to calculate the total cross sections (TCS5) for electrons scattering from several molecules (CF4, CCl4, CFCl3, CF2 Cl2, and CF3 Cl) over an incident energy range 30 - 5000 eV using the additivity rule model at Hartre-Fock level. The quantitative TCS5 are compared with those obtained by experiments and other theories wherever available, and good agreement is obtained above 100 eV. It is shown that the modified potential can successfully calculate the TCS5 of electron-molecule scattering over a wide energy range, especially at lower energies. 展开更多
关键词 total cross section additivity rule atomic and molecular collision
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