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spectrum form     
相关语句
  频谱形式
     The spectrum form of square-wave controlled laser, optical signal heterodyne detecting device and principle of electrical signal demodulation are considered with emphasis.
     文中着重分析了方波控制激光器的频谱形式、光信号外差探测装置和电信号解调原理.
短句来源
  谱型
     According to 59 groups of measured wave spectra which were taken at Xichong Station adjacent to Hong Kong under the influence of Typhoon Tess in 1985, and by application of JONSWAP spectrum form , repeated fitting and comparison on the measured non-dimensional mean spectrum, a non-dimensional fitted spectrum for typhoon wave was advanced.
     据1985年Tess台风影响下香港附近西冲测站59组实测海浪谱,应用JONSWAP谱型反复对实测的无因次平均谱拟合与比较,提出了一个台风海浪无因次拟合谱。
短句来源
  频谱形态
     Conclusion Color doppler blood stream spectrum form is a important index in differential diagnosis of benign and malignant breast neoplasm.
     结论彩色多普勒血流频谱形态是鉴别乳腺良、恶性肿块的一项重要指标。
短句来源
     Right atrium and ventricle enlarged, pulmonary artery, left and right pulmonary expanded, spectrum form of pulmonary showed characteristic“finger fist symptom”, and pulmonary acceleration time and ejection time shortened.
     右房、右室增大,主肺动脉及分支增宽,右室壁增厚,运动幅度减低。 右心功能减低,下腔静脉增宽,三尖瓣可见不同程度的返流,肺动脉压增高,肺动脉频谱形态见特征性的“指拳征”。
短句来源
  “spectrum form”译为未确定词的双语例句
     the emission spectrum form of Ce3+ in the stronium aluminate is band, this is the transition of Ce3+ from the low engery class to the base state of 2F5/2 and F7/2.
     合成物发射光谱为带状发射峰,这是Ce~(3+)的低能带向其两个基态~2F_(5/2)和~2F_(7/2)跃迁发射的结果。
短句来源
     the two kinds of spectrum form are fitted with the three typhoon process datum in the same location;
     拟合之后的Von Karman谱和Davenport谱与实测谱均吻合较好,吻合程度远超过标准的Von Karman谱和Davenport谱,说明该两种谱形式都适合于描述台风的脉动风速谱,只是对应的参数与标准谱不一样。
短句来源
     The results indicate that the chaff echo signal is evidently different from the target echo signal, noise jamming signal and some modulated jamming signal in time domain width, periodicity, amplitude probability distribution, frequency spectrum form, etc. So the automatic identification of chaff jamming could be implemented on -line and in real time.
     处理结果表明,箔条回波在时域宽度、周期性、幅度概率分布、频谱形状等多种特征上与目标回波信号、噪声干扰信号、同频异步调制干扰信号等有明显的区别,从而可以实现箔条干扰存在与否的在线实时判定。
短句来源
     This paper discusses more completely the influence of time-interval of sampling on the value of wave factor, the distribution, wave spectrum form,wave group character and the distribution of wave direction through analyzing and comparing the practical wave data observed, digital simulation and simulation in the laboratory and makes a proposal for the selection of time-interval sampling.
     通过对实测海浪资料、数值模拟和实验室模拟资料的分析对比,比较全面地探讨了采样时距对波浪要素值及其分布、波谱形状、波群特性以及波浪方向分布等的影响,并对采样时距的选取提出了建议。
短句来源
     This paper analyses the irregularity of sliver or rovings by applying ARMA model spectrum technique. Comparing the model spectrum with a wave spectrum form evenness tester, it is discovered that a desired wave spectrum can be obtained using model from ARMA(5,1) toARMA(8,2) when a original signal had been filtered by FIR lower pass filter whose length is21. This paper also discusses the stability of stochastic signals from slivers or rovings.
     本文采用ARMA模型谱分析纱条不匀,通过与条干仪分析结果对比发现,在对信号经21阶 FIR低通滤波器滤波后,选择ARMA(5,1)到ARMA(8,2)的模型,能得到较好的分析结果。 对此,本文检验了不少纱条不匀信号的非稳定性,这在选择模型参数辨识方法时应予注意。
短句来源
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      spectrum form
    The spectrum form and characteristics are virtually identical in the two cases.
          
    The dielectric fluctuations which give rise to the spectrum form an orientational and collisional (or intermolecular) contribution, and cross-correlation between the two can occur.
          
    It has subsequently been shown that the spectrum form is practically independent of the red shift - i.e., it remains constant during the lifetime of galaxies and quasars.
          
    The spectrum form indicated that H-4/H-5 and H-6/H-7 were nonequivalent.
          
    The peaks from a spectrum form a peak list and in general there are multiple peak lists used in the assignment process.
          


    Mathematical model of infrared laser heterodyne gas analyser for extracting signal is described in this paper. It is proved that the detecting sensitivity of heterodyne gas analyser can reach up to 10-4ppb, about nine orders of magnitute higher than that of direct detection. The spectrum form of square-wave controlled laser, optical signal heterodyne detecting device and principle of electrical signal demodulation are considered with emphasis. The flow chart of the gas density signal is deduced, according...

    Mathematical model of infrared laser heterodyne gas analyser for extracting signal is described in this paper. It is proved that the detecting sensitivity of heterodyne gas analyser can reach up to 10-4ppb, about nine orders of magnitute higher than that of direct detection. The spectrum form of square-wave controlled laser, optical signal heterodyne detecting device and principle of electrical signal demodulation are considered with emphasis. The flow chart of the gas density signal is deduced, according to which the block diagram of controlled CO2 laser heterodyne gas analyser is drawed.

    本文研究红外激光外差气体分析仪信号提取的数学模型,论证了外差气体分析仪的探测灵敏度可达10~(-4)ppb,这比直接探测方式约高九个量级.文中着重分析了方波控制激光器的频谱形式、光信号外差探测装置和电信号解调原理.最终导出外差气体分析仪气体浓度信息流程,据此绘制了方波控制CO_2激光外差气体分析仪原理方框图.

    The data obtained from a seismic profile extending from Maanshan, Changshu to Qidong in South China which is about 300 km in length, was processed.The result shows that the head waves and reflected waves from different interfaces in this region possess different characteristics. By use of the travel time discontinuties, apparent velocity variations, frequency spectrum forms, Q value variation and amplitude characteristics, it is shown that there is a deep rift and medium loose rubbish zone within the earth's...

    The data obtained from a seismic profile extending from Maanshan, Changshu to Qidong in South China which is about 300 km in length, was processed.The result shows that the head waves and reflected waves from different interfaces in this region possess different characteristics. By use of the travel time discontinuties, apparent velocity variations, frequency spectrum forms, Q value variation and amplitude characteristics, it is shown that there is a deep rift and medium loose rubbish zone within the earth's crust in the Liyang seismic zone of Jiangsu province.The crust consists of layered medium in the region along the profile and the average thickness is between about 32-34 km. It is shown that the crust is getting shallower in the eastern continental fringe zone and there is a low velocity layer within the crust. The characteristics of deep structure in the Liyang seismic region along the profile are also discussed.

    本文根据马鞍山、常熟两地井中组合爆炸激发的地震波,在马鞍山—常熟—启东长约300余公里的测线上,利用相遇和单支观测系统得到的记录,进行了数据处理、走时拟合和反演计算,并通过射线跟踪和理论地震图等,探讨了地壳介质的横向不均匀性,建立了该区成层地壳结构与速度分布的初步模型。 研究结果表明,该区不同界面的首波和反射波具有不同的特征。根据走时的间断、跳跃,视速度变化,频谱形态与主频率分布,Q值变化与振幅特征表明,在江苏省溧阳地震活动地区,地壳内部存在着深断裂和介质疏松破碎地带。 在该测线所辖地区,地壳由成层介质组成,其平均厚度为32—28km,在该地壳中存在着低速层,向东陆缘地带地壳缓慢变薄。 本文最后讨论了剖面所经溧阳地震地区的深部结构特征。

    A wideband nonlinear scattering spectrum (1.1—1.9 um) is obtained in a multimodeoptical fiber pumped with an A-O Q-switched Nd:YAG laser at 1.06 um.The spectrum forms a goodquasicontinuum at the zero-material-dispersion range of the fiber.Discussion about the generationmechanism of the continuum is given.It shows that the continuum is generated by combined interac-tion of stimulated Raman scattering and four-photon mixing.

    利用1.06μm声光调Q激光器作泵浦源,从多模光纤获得了光谱范围从1.1~1.9μm 的宽带非线性散射谱。散射谱在光纤零色散波长附近有较平坦的宽带准连续谱。我们认为此光连续谱是由受激喇曼散射与四光子混频过程的组合作用产生的。

     
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