In order to improve the exploration effect of deep non-ferrous mineral resources, multi-channel observation methods for induced polarization （IP） electrical sounding data and their inversion imaging technology are s...In order to improve the exploration effect of deep non-ferrous mineral resources, multi-channel observation methods for induced polarization （IP） electrical sounding data and their inversion imaging technology are studied. First of all, four multi-channel observation methods are developed based on conventional IP electrical method, namely three-electrode and four-electrode arrays of unilateral and bilateral current transmitting. Then the maximum smoothness constrained inversion method of the least squares sense for IP electrical sounding data is proposed, and the inversion software is programmed. Finally, the simulation and inversion results of geo-electrical model for the proposed observation methods are analyzed. And the comparison results show that three-electrode array of bilateral current transmitting gives the best result, but the intensity in field work is larger than others; unilateral three-electrode and four-electrode arrays give the better results. Taking detection results and convenience of field exploration work into consideration, these two methods are more suitable for practical application; bilateral observation method of four-electrode array is not suitable for the detection of the steep ore bodies.展开更多
就在杜比推出测试碟之前，他们还出了一张游戏音效DVD，也就是本文的主角——《Dolby Surround Soundin Games 2006》。不要被碟片的名称所迷惑，这不是游戏碟片，也不是游戏试玩片段，不需要游戏机或电脑，就是一般家用的DVD播放机就...就在杜比推出测试碟之前，他们还出了一张游戏音效DVD，也就是本文的主角——《Dolby Surround Soundin Games 2006》。不要被碟片的名称所迷惑，这不是游戏碟片，也不是游戏试玩片段，不需要游戏机或电脑，就是一般家用的DVD播放机就可以播放出这张碟片的效果，因为这不是游戏碟片，而是预先录制好的游戏操纵音视频片段，给大家尝试电脑或者视频游戏机的画面和音效，这种效果只可观赏，而不能操纵，所以在使用上与普通的DVD碟片是完全一样的。展开更多
In this paper the method of approximate expansion is used to analyse a perfect planar surround sound system, resulting in an order of new and upgrade systems. First reproductinn signals of the perfect system and the c...In this paper the method of approximate expansion is used to analyse a perfect planar surround sound system, resulting in an order of new and upgrade systems. First reproductinn signals of the perfect system and the characteristics of different orders systems are analysed. The independent transmission signals and decoding (reproduction) equation of the systexns are given. The compatibility among different orders systems and the problem of simplifying output channels are discussed. The problem of signal picking up, recording,transmitting and the possibility of putting the systems into practical use are studied. A sound hoage localization experiment for the systems is carried out in order to study haage localization in relaion to the numbers of transmission signals and output channels. The experimental result is consistemt with the theoretical result. This work lay down a base for practical use.展开更多
基金Project(41174102)supported by the National Natural Science Foundation of China
文摘In order to improve the exploration effect of deep non-ferrous mineral resources, multi-channel observation methods for induced polarization （IP） electrical sounding data and their inversion imaging technology are studied. First of all, four multi-channel observation methods are developed based on conventional IP electrical method, namely three-electrode and four-electrode arrays of unilateral and bilateral current transmitting. Then the maximum smoothness constrained inversion method of the least squares sense for IP electrical sounding data is proposed, and the inversion software is programmed. Finally, the simulation and inversion results of geo-electrical model for the proposed observation methods are analyzed. And the comparison results show that three-electrode array of bilateral current transmitting gives the best result, but the intensity in field work is larger than others; unilateral three-electrode and four-electrode arrays give the better results. Taking detection results and convenience of field exploration work into consideration, these two methods are more suitable for practical application; bilateral observation method of four-electrode array is not suitable for the detection of the steep ore bodies.
文摘就在杜比推出测试碟之前，他们还出了一张游戏音效DVD，也就是本文的主角——《Dolby Surround Soundin Games 2006》。不要被碟片的名称所迷惑，这不是游戏碟片，也不是游戏试玩片段，不需要游戏机或电脑，就是一般家用的DVD播放机就可以播放出这张碟片的效果，因为这不是游戏碟片，而是预先录制好的游戏操纵音视频片段，给大家尝试电脑或者视频游戏机的画面和音效，这种效果只可观赏，而不能操纵，所以在使用上与普通的DVD碟片是完全一样的。
文摘In this paper the method of approximate expansion is used to analyse a perfect planar surround sound system, resulting in an order of new and upgrade systems. First reproductinn signals of the perfect system and the characteristics of different orders systems are analysed. The independent transmission signals and decoding (reproduction) equation of the systexns are given. The compatibility among different orders systems and the problem of simplifying output channels are discussed. The problem of signal picking up, recording,transmitting and the possibility of putting the systems into practical use are studied. A sound hoage localization experiment for the systems is carried out in order to study haage localization in relaion to the numbers of transmission signals and output channels. The experimental result is consistemt with the theoretical result. This work lay down a base for practical use.
