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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。 | |
Microtremor observations at 59 stations in the Akita plain in Japan were carried out during November 23 through November 28, 1969 using magnetic tape recorder.
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The coded analog signals may then be transferred on a single line to a decoder unit and/or stored on a single track of an AM magnetic tape recorder for later processing.
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The coded analog signals may then be transferred on a single line to a decoder unit and/or stored on a single track of an AM magnetic tape recorder for later processing.
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This instrument is designed to float ~3 m above the seafloor at depths of up to 6100 m for periods of up to 10 days and continuously records the output of a single hydrophone on a four-channel 0.064 cm/s (1/40 in./s) analog magnetic tape recorder.
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Data are recorded in digital format on a specially designed magnetic tape recorder.
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| | The purpose of designing and experimenting a MFT-PTtype composite multichannel telemetry system is to transmit and observe at the same time short period and long period seismic signals and other geophysical data for a comparatively large area (100-200kms radius).It is a combination of the pulse amplitude modulation and frequency modulation types. The design of the system consists of some special features, such as the "Waiting Type" multi-phase multivibrator, singletube monostable circuit. When this system i... | | MFT—PT型遥测仪的研制,是为了在较大范围内(100—200公里)同时传输观测短周期、长周期地震信号和其他地球物理量. 该仪器系统是由脉冲幅度调制和频率调制两种遥测系统复合组成的.其设计特点有如等待式多相多谐振荡器,单管单稳电路等.遥测仪与电子计算机,磁带机配用可以达到快速综合处理地震信号的目的. 该仪器如果采用话音频率,则可以利用电话线路把地震信号送到几千公里之外.遥测仪如果与射频收发讯机配合,则可以构成无线流动台网. | | 文摘来源 | | In order to study the structure of the crust and the upper mantle in the Xizang plateau, we have developed a set of analog magnetic tape recording system. Each seismograph consists of three 2Hz seismometers of type LS-1, three amplifiers of type DDF-5, three modulators and one magnetic tape recorder of type DCJ-1, a quartz clock, a timing circuit and a radio.The frequency band of the seismograph is 2Hz to 20Hz. Time error is less than 0.1 second. Being improved by the flutter c... | | 为了进行西藏高原地区的爆炸地震研究,研制了一套模拟磁带记录系统。每台仪器包括三个两周的拾震器(LS-1型)、三个相应的低噪声线性放大器(DDF-5型)、三个调制器、一台低频磁带记录器(DCJ-1型)、石英钟、对时器和收音机。仪器频率范围是2周—20周(对速度),时间误差小于0.1秒。采用抖动补偿和频率滤波的办法,使系统的信噪比提高到50分贝。系统的幅度误差小于10%。经过野外实地观测和资料整理分析,证明其性能和指标能够满足地壳与上地幔爆炸地震研究的需要。通过模/数转换器,把模拟磁带转录成数字磁带,可以在电子计算机上进行各种数字处理。 | | 文摘来源 | | The wear tests of commercially pure irou, differeat heat-treated 65 Mn steel and high chromium white iron are conducted on a pin-on-disk abrasive wear testing ma-chine. The abrsion force between the abrasive and the specimen surface is recorded and measured during the abrasive wear process with the instrumentation systems con-sisting of strain gauge, magnetic tape recorder and data processing computer. The influences of abrasive particle size, load, material and hardness of the specimen on... | | 用工业纯铁,不同热处理的65Mn钢以及高铬白口铁试样在销盘式磨粒磨损试验机上进行磨损试验。用动态应变仪-磁带记录器-数据处理计算机仪器组配记录、测定了磨料磨损过程中,磨粒和试样磨损表面间的磨损作用力,研究了磨料粒度、载荷、试样材料及硬度对磨损作用力、磨损量的影响;分析了随磨料粒度的变化,磨损机制变化的规律,进一步探讨了磨损机理。 | | 文摘来源 | |   | | << 更多相关文摘 |
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