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噪声是
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  noise consist of
     Upstream channel noise consist of input noise in about 70%. Abstract the input noise in a model of narrow band interference and take a nonlinear suppression measure. Construct a nonlinear narrow band interference suppresser and simulate in the SCDMA system.
     在HFC网络回传通路中有近 70 %的噪声是输入噪声 ,把输入噪声抽象为一个窄带干扰模型 ,对其采取非线性抑制措施 ,构造了一个非线性窄带干扰抑制器 ,在SCDMA系统下做了仿真 ;
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  “噪声是”译为未确定词的双语例句
     The image noise are 7.83, 8.10, and 10.47 at different FOV of 200 mm×200 mm、150 mm×150 mm、100 mm×100 mm.
     视野为200mm×200mm、150mm×150mm、100mm×100mm时的图像噪声是7.83、8.10、10.47。
短句来源
     Its short term stability measured in 0.001 second is 4.2×10~(-10), in 0.01 second is 2.8×10~(-10), in 0.1 second is 2.5×10~(-10) and in 1 second is 5.5×10~(-10), the single sideband phase noise for 1 kHz offset from the carrier is 108 dBC.
     经测量获得短期频率稳定度为:0.001s是4.2×10~(-10),0.01s是2.8×10~(-10),0.1s是2.5×10~(-10),1s是5.5×10~(-10)。 在偏离中心频率1kHz处的单边带相位噪声是-108dBC/Hz。
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     Traditional methods of signal detection and estimation were based on the assumption that the background noise is white.
     传统的信号检测和估计方法一般是建立在背景噪声是白噪声这一假设基础之上。
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     The operation frequency can be tuned automatically from 2.22 to 2.715 GHz,while the phase noise of VCO and the loop at 1 MHz is-125.7 and-122.17 dBc/Hz respectively,which meets well the requirement of the Bluetooth protocol.
     VCO的相位噪声是-125.7 dBc/Hz@1 MHz,环路的相位噪声是-122.2 dBc/Hz@1 MHz,符合蓝牙协议的要求.
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     Operating at a 3 V power supply,the VCO has a tuning range from 399.8 MHz to 465.1 MHz. A phase noise of-137 dBc/Hz is measured at 1 MHz off the carrier frequency.
     电路采用3 V电压供电,频率范围399.8~465.1 MHz,偏离中心频率1 MHz处的相位噪声是-137 dBc/Hz。
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     A recommended acceptable noise level can be determined from the teacheras response to the noise under investigation.
     噪声调查;
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     WHITE NOISE
     白噪声
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     Noise radiated from different jets are similar.
     喷注噪声的频谱相似的。
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     f)great oil pump noise ;
     六油泵噪声大;
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  noise consist of
Realizations of shot noise consist of sequences of very sharp pulses with random heights and randomly distributed times between subsequent pulses.
      


Accoustics becomes so important and complicated a problem in modern building practice, that it should be properly considered by every architect today. From the view of its practical aspects, the author makes a general review of several major problems in recent development of architectural acoustics. 1. Criteria of room acoustics: a)Reverberation time, b)Practical aspects of physical acoustics and discussion of the second physical quantity, c)Subjective observations; 2. Sound Systems; 3. Acoustical materials;...

Accoustics becomes so important and complicated a problem in modern building practice, that it should be properly considered by every architect today. From the view of its practical aspects, the author makes a general review of several major problems in recent development of architectural acoustics. 1. Criteria of room acoustics: a)Reverberation time, b)Practical aspects of physical acoustics and discussion of the second physical quantity, c)Subjective observations; 2. Sound Systems; 3. Acoustical materials; 4. Noise control and sound insulation.

建筑声学在现代建筑设计中的地位日趋重要,其复杂性也随之而增加;为今日每一建筑师所值得注意的问题。作者以实用的观点对近年来建筑声学发展中的几个主要问题加以综合的叙述。一、室内音质的评价标准:(1),混响时间,(2)物理声学的意义,和第二物理参量的研究,(3)主观评价;二、扩音系统;三、吸声材料;四、噪声控制和声音隔绝。

In order to rectify the existing acoustic defects of the lecture hall of Wen-Yuan Building in our university, a series of acoustic measurements were carried out, and analysis and a scheme of reconstruction was proposed therefrom, After completing the alteration according to the new designs in the summer of 1956, the hearing conditions of the hall were found to be greatlly improved. The author pointed out, however, that due to the lack of experience in this kind of work and to the insufficiency of acoustic instruments,...

In order to rectify the existing acoustic defects of the lecture hall of Wen-Yuan Building in our university, a series of acoustic measurements were carried out, and analysis and a scheme of reconstruction was proposed therefrom, After completing the alteration according to the new designs in the summer of 1956, the hearing conditions of the hall were found to be greatlly improved. The author pointed out, however, that due to the lack of experience in this kind of work and to the insufficiency of acoustic instruments, there are still certain defects, the remedy of which would require further research work. Ⅰ. Introduction Ⅱ. A general description and analysis of the lecture hall before alteration. Ⅲ. Analysis and improvement from the view of geometrical acoustics. Ⅳ. Reverberation time. Ⅴ. Sound intensity distribution after alteration. Ⅵ. Noise reduction. Ⅶ. Some unsolved defects and problems.

为改善本校文远楼大讲堂内的音质缺陷,我们曾进行了一系列的音质测定和分析工作,并作了改建设计。1956年暑改建完毕以后,基本上已能符合听讲的要求,听者一般都感到清晰和满意。由于声学仪器和实际经验的不足,工作中尚存在着一些缺点和问题,在本报告中亦一一提出,以待今后继续加以研究解决。Ⅰ.绪言。Ⅱ.现况介绍和分析。Ⅲ.从几何声学上加以分析和改进。Ⅳ.混响时间的改进。Ⅴ.改建后的声强分布。Ⅵ.降低噪声的措施。Ⅶ.工作中存在的问题和缺点。

The amplitude distribution of narrow hand semiconductor noise in junction type OC70, OC71 and point contact type 2N32A transistors were measured experimentally by the "maximum amplitude" method. It is found that the amplitude distribution of nai-row band semiconductor noise agrees with that of the normal law distribution.

本文中描述用振幅峰值的方法,测量面接触型晶体管OC70,OC71和点接触型晶体管2N32A内窄频带低频率噪声的振幅分布。测量结果证明窄频带晶体三极管噪声的振幅分布,和遵守正态律的振幅分布相符合。

 
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