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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Experiments [1, 2] have revealed a transition accompanied by an appreciable enhancement of pulsations whose period is twice that of the driving vibrating tape.
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Results are given of experimental investigations of heat transfer under conditions of forced convection of highly subcooled water in a smooth pipe and with an internal twisted tape under asymmetric heating.
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The technique for measuring distortions is described, and the results of measurements are presented for several films cut from different sections of a standard piece of double-sided tape with a length of ~7 m and a useable width of ~20 cm.
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The standard plastic base of the tape under investigation is 190 μm thick; ~50-μm-thick layers of diluted PX3 emulsion-gel are applied to its opposite sides.
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The trigger system of the detector and the conditions for recording "charged" and "neutral" events on a magnetic tape are described.
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| | In order to solve the problem of compatibility between the signal of four-channel panoramic sound, three-dimensional surround sound and two-channel stereo in magnetic tape recording systems, a method using matrix encoding recording is described in this paper.In this system, the four-channel signal recorded in the tape is completely compatible with the conventional two-channel stereo recording system, and the circuit used in this new system is very simple. | | 为了解决磁带录声系统中四通路全景声、三维空间环绕声信号与双通路立体声信号之间的兼容问题,文中提出一种应用矩阵编码信号的记录方法,使磁带上所记录的四通路信号与目前已通行的双通路立体声磁带记录系统之间能够完全兼容;而所用于新系统的附加电路也非常简单。 | | 文摘来源 | | This paper puts forward a new highly efficient conical feed horn which operates with orthogonal circular polarization at two bands. The method is to place two dielectric tapes which are set apart at a certain distance in the smooth wall horn. In low band, only the tape near the aperture contributes mainly to the pattern equalization, while in high band, both tapes contribute to pattern equalization. A rotationary symmetric pattern with low level sidelobe can be obtained by choosing the rig... | | 本文提出一种新颖的正交圆极化双频高效率圆锥喇叭。其原理是在光壁喇叭中放置两个相距一定间隔的介质带。在低频区工作时,基本上只有靠近喇叭口径的介质带对辐射图的等化作出贡献;而在高频区,两个介质带共同对辐射图的等化作出贡献。适当选择这两个介质带的尺寸,即可在高、低频区都获得波瓣等化、旁瓣电平低的喇叭方向图。从而,把“介质加载”技术推广到双频圆极化的应用。 文中介绍了一个设计实例。该喇叭工作于频率比为1:1.40的两个频区中。在每个频区中,方向图的等化带宽约为10%。输入电压驻波比在高、低频区的使用频段中分别小于1.05和1.12。 | | 文摘来源 | | It is the frist time trial in China to control automatically the radio broadcasting equipments in a studio with a microcomputer. This controlling system puts the basic broadcasting program lists into firmware. Before broadcasting, these lists can be corrected manually with a keyboard. During broadcasting, the radio programs to be broadcasted may be announced, the end of programs on the tape may be checked, faults and errors may be detected, and the records may be printed out. As high reliability is re... | | 本文详细介绍了用微机播控系统实现对广播节目播出室内各设备的自动控制。本系统将基本节目运行表固化,运行前,人工可通过键盘对其进行修改。运行中可进行节目预告,随机键入,检测磁带节目结尾,检测故障及打印记录。因控制广播节目的播出对可靠性要求极高,情况较为复杂,故本软件规模较大,系统采用时间控制与条件控制相结合的方式,中断情况共有38种。在抗干扰处理方面也采取了多种措施。 | | 文摘来源 | |   | | << 更多相关文摘 |
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