During the last few decades, photothermal radiometry（PTR） has been greatly developed and widely applied in the field of nondestructive testing. However, the traditional PTR system employs an expensive lock-in amplif...During the last few decades, photothermal radiometry（PTR） has been greatly developed and widely applied in the field of nondestructive testing. However, the traditional PTR system employs an expensive lock-in amplifier to detect the weak photothermal signal, which leads to high cost and long test time. In this paper, a fast transmission PTR system based on sampling by using an internal computer sound card was developed to lower the system cost and shorter the test time. A piece of amorphous silicon（a：Si） thin film solar cells with artificial defects was prepared and tested by the system. The results show that the sharpened defects can be identified easily and quickly according to the significant peaks of the original infrared signal sampled by the internal computer sound card. Furthermore, more detailed defects can be investigated by processing the infrared signal. These validate the effectiveness of the proposed transmission PTR system as a low cost and efficient non-destructive test technique.展开更多
在影视配乐创作中,乐器数字接口(Musical Instrument Digital Interface,MIDI)采样器及软音源的应用越来越受到重视。这些工具可以模拟各种乐器的声音,拓展了作曲家的创作思路和想象力,同时提高了音乐的质量和效率。详细介绍MIDI采样器...在影视配乐创作中,乐器数字接口(Musical Instrument Digital Interface,MIDI)采样器及软音源的应用越来越受到重视。这些工具可以模拟各种乐器的声音,拓展了作曲家的创作思路和想象力,同时提高了音乐的质量和效率。详细介绍MIDI采样器及软音源的原理和特点,列举相关的主要软件和硬件设备;结合实际案例,详细阐述MIDI采样器及软音源在影视配乐中的实际应用方法和技巧;分析MIDI采样器及软音源在影视配乐中的效果,并针对存在的问题提出相应的建议和改进方案。展开更多
基金supported by the National Natural Science Foundation of China under Grant No.61379013the Excellent Doctoral Academic Support Program under Grant No.YBXSZC2013021
文摘During the last few decades, photothermal radiometry（PTR） has been greatly developed and widely applied in the field of nondestructive testing. However, the traditional PTR system employs an expensive lock-in amplifier to detect the weak photothermal signal, which leads to high cost and long test time. In this paper, a fast transmission PTR system based on sampling by using an internal computer sound card was developed to lower the system cost and shorter the test time. A piece of amorphous silicon（a：Si） thin film solar cells with artificial defects was prepared and tested by the system. The results show that the sharpened defects can be identified easily and quickly according to the significant peaks of the original infrared signal sampled by the internal computer sound card. Furthermore, more detailed defects can be investigated by processing the infrared signal. These validate the effectiveness of the proposed transmission PTR system as a low cost and efficient non-destructive test technique.
文摘在影视配乐创作中,乐器数字接口(Musical Instrument Digital Interface,MIDI)采样器及软音源的应用越来越受到重视。这些工具可以模拟各种乐器的声音,拓展了作曲家的创作思路和想象力,同时提高了音乐的质量和效率。详细介绍MIDI采样器及软音源的原理和特点,列举相关的主要软件和硬件设备;结合实际案例,详细阐述MIDI采样器及软音源在影视配乐中的实际应用方法和技巧;分析MIDI采样器及软音源在影视配乐中的效果,并针对存在的问题提出相应的建议和改进方案。
