| 一类指数信号与正弦信号相乘的不定积分注记 |
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| 引用本文： | 方静,刘晶,卢卫君. 一类指数信号与正弦信号相乘的不定积分注记[J]. 大学数学, 2017, 33(2): 95-100. DOI: 10.3969/j.issn.1672-1454.2017.02.017 |
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| 作者姓名： | 方静 刘晶 卢卫君 |
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| 作者单位： | 广西民族大学理学院,南宁,530006 |
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| 基金项目： | 广西自然科学基金，广西高校科学研究资金重点研究项目 |
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| 摘 要： | 针对两类不定积分I_1=∫e~(ax)cosbxdx和I_2=∫e~(ax)sinbxdx的分部积分常规求法,从指数信号与正弦信号相乘及复指数信号的角度进行分析,并给出一些特别的形变统一及记忆方法.
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| 关 键 词： | 不定积分 指数信号 正弦信号 形变统一 |
Remark on a Type of Infinite Integral with Exponential Signal Multiplied by Sine Signal |
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| FANG Jing,LIU Jing,LU Wei-jun. Remark on a Type of Infinite Integral with Exponential Signal Multiplied by Sine Signal[J]. College Mathematics, 2017, 33(2): 95-100. DOI: 10.3969/j.issn.1672-1454.2017.02.017 |
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| Authors: | FANG Jing LIU Jing LU Wei-jun |
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| Abstract: | This paper aims at solving two types of infinite integrals with the forms I1=∫eax cosbx dx and I2=∫eax sinbxdx via integration by parts.From the views of real exponential signal multiplied by sine signal and complex exponential signal, the authors make some analysis and give some united deformation and corresponding memory techniques. |
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| Keywords: | indefinite integral exponential signal sine signal united deformation |
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