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频率扫描     
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  frequency scan
     The paper uses serial communication to control frequency scan of multi-receivers as soon as applying the feature of Win32 multithread and multiproc to make signal's real time collection and identification,which realizes the synchronization of serial communication and signal collection and identification.
     该文应用串行通信技术对多台接收机进行频率扫描控制的同时,根据Win32操作系统支持多线程和多进程的特征,进行信号的实时采集与识别,实现串行通信与信号采集识别的同步。
短句来源
     It finds out the connection of the PSD of rail's vertical vibration speed and the wheel/rail surface roughness ratio spectrum depending on the Remington model and the coupling of wheel's radial vibration and rail's vertical vibration. By the method of admittance measure and frequency scan, we can obtain the character frequency of 60kg rail of China, first-order frequency is 150Hz and second-order frequency is 300Hz.
     车轮的径向振动与钢轨的垂向振动耦合,根据Remington模型可以得到钢轨垂向振动速度的功率谱与轮轨表面粗糙度谱之间的关系,用导纳测量及频率扫描方法获得我国常用的60kg/m的钢轨垂向振动的特征频率值:一阶为150Hz,二阶为300Hz。
短句来源
     The result of frequency scan test shows that the melt flow of TPUE is pseudo plastic fluid, the viscosity is decreasing as frequency increases.
     频率扫描测试分析表明,TPUE熔体随频率的增加会出现剪切变稀现象,是假塑性非牛顿流体,且溶剂法与熔融法相比制备的TPUE在相同温度下熔体动态模量更低,粘度随频率变化相对较小;
短句来源
     Two novel depth-domain frequency spectrum analysis methods for logging data have been developed, which are depth-domain frequency scan and moving-window frequency spectrum analysis.
     本文在前人研究的基础上提出了两种基于测井资料的深度域频谱分析方法──深度域频率扫描和滑动窗频谱分析。
短句来源
     With giving birth to steady frequency scan signal, the Phase Lock Loop(PLL) circuit is the most impoprtant circuit part in the design.
     PLL锁相环路是本系统的关键电路,它产生稳定的连续的频率扫描信号。
短句来源
更多       
  frequency sweep
     The direct digital synthesizing frequency sweep signal system based on the technique of ISP
     基于ISP技术的数字频率扫描信号发生系统
短句来源
     Digital Realization Method of Frequency Sweep Signal
     频率扫描信号的一种数字实现方法
短句来源
     The results show that the three gluten proteins respectively exhibit the critical stresses of 49.59,24.88 and 12.48Pa during the stress sweep,the elastic moduli of 1194,789 and 583Pa during the frequency sweep with a sweeping frequency of 1.117rad/s,and the deformations of 7.09%,9.43% and 14.29% during the creep and recovery sweep with a sweeping period of 5.11min.
     频率扫描时,当频率为1.117 rad/s时它们的弹性模量分别为1194,789和583 Pa; 蠕变-恢复实验时,当时间为5.11m in时它们的形变分别为7.09%,9.43%和14.29%.
短句来源
     In SBR filled with CB, the effects of filler content and the addition of additive on dynamic viscoelasticity were investigated through strain sweep, temperature sweep and frequency sweep.
     在CB填充SBR体系中,通过动态应变扫描、温度扫描、频率扫描等方式,主要研究了CB用量、配合剂等对混炼胶中网络结构及其动态粘弹性的影响。 由于CB和SBR有好的界面作用,温度扫描中随温度的上升模量随之降低。
短句来源
     Experiments including apparent viscosity,thixotropy loop,creep and recovery,little oscillatory shear sweep and frequency sweep of high hygroscopic profile modification HSG sol were conducted.
     研究了高吸水冻胶调剖堵水剂HSG成胶前溶胶体系的流变性能。 通过考察主剂共聚物含量对溶胶体系表观粘度的影响,以及粘温特性、触变性、蠕变-回复、小幅振荡剪切应力扫描和频率扫描实验,确定了溶胶体系的流变性参数。
短句来源
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  frequency scanning
     The frequency scanning range of the cw ring dire laser has the maximum value △λ_(s max) and the minimum value △λ_(s min).
     连续波环形染料激光器的频率扫描范围存在着最大值△λ_s max和最小值△λ_s min。
短句来源
     Characteristics of Frequency Scanning in the CW Ring Dye Laser
     连续波环形染料激光器的频率扫描特性
短句来源
     This paper elaborated the measuring system based on ISA bus interface, using the method of π network to measure the electrical parameters of quartz crystal wafer and direct digital synthesizer(DDS) to produce the wishing frequency scanning signal and stimulate π network We can get the resonate frequency,activity,clutter and so on;
     阐述了基于 ISA总线接口的测量系统 ,采用 π网络法测量石英晶片的电参数 ,使用直接数字频率合成器( DDS)生成期望的频率扫描信号并激励 π网络的方法 ,获得石英晶片的谐振频率、活力、杂波数等电参数 ;
短句来源
     This paper introduces a PLL frequency synthesizer BU2614 combined with a special radio module CAX1019S and a MCU AT89C51, which can realize the FM tuner. The tuner can realize multiple functions, such as automatic frequency scanning, locking, and displaying etc.
     介绍了一种锁相频率合成器 BU2 615 ,结合专用收音模块 CXA10 19S、单片机 AT89C5 1能实现 FM调谐器 ,该调谐器能实现频率扫描、锁定和显示等功能。
短句来源
     The PLL part, made of PD, Loop Filter, Voltage Control Oscillator, is the key circuit of the system to produce steady and continuous frequency scanning signal.
     PLL锁相环路部分主要由鉴相器、环路滤波器、电压控制振荡器构成,产生稳定连续的频率扫描信号,它是本系统的关键电路。
短句来源
更多       
  frequency sweeping
     The tests of frequency sweeping and dynamic displacement sweeping at different temperatures for the viscoelastic material silicon rubber were conducted.
     对硅橡胶粘弹性阻尼材料进行不同温度的频率扫描和动态位移扫描实验.
短句来源
     The fast flaw-recognition model based on the magnetic field measurement and the depth-detection model based on the frequency sweeping method were built. Experimental results proved their accuracy.
     在对交变漏磁检测理论进行分析的基础上,提出了基于场量测量和频率扫描技术的快速识别和深度定量检测模型,并通过试验证明了该模型能实现表面缺陷的快速检测和缺陷深度的定量检测。
短句来源
     Nondestructive Testing System of Alternative Magnetic Leakage Flux based on the Magnetic Field Measurement and the Frequency Sweeping Method
     基于场量测量和频率扫描技术的交变漏磁无损检测系统
短句来源
     All structure of bifurcation and chaos can be shown on the V0-ω parameter plane by the method of frequency sweeping. The normal and inverse bifurcation sequences are fully symmetric.
     在V_0-ω外控参数平面上,频率扫描显示了分岔与混沌的整体结构:正的和逆的倍周期分岔序列的对称性;
短句来源
     This paper mainly discusses the precise positioning method for the urban seismic mobile moving fault, and the study results shows: the frequency sweeping method and the mutual correlation method of data processing can effectively suppress the disturbances from strong vibrations with the vibroseis in the strong-disturbance background in the city so as to carry out the seismic investigations in the urban area;
     重点讨论了城市地震活动断层精确定位方法. 研究结果表明:面对城市的强干扰背景,利用可控震源,采取频率扫描方法和数据处理的互相关技术,可以有效压制强振动干扰,实现城市市区的地震勘探;
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  frequency scan
The high resolution spectra are measured tuning the length of a CO2 waveguide laser by means of a PZT yielding a frequency scan of 230 MHz around the CO2 laser lines.
      
Our frequency scan data, as well as our data for the time course of resistance and capacitance, show that the fast change is associated with both the under-the-cells and between-the-cells resistance.
      
The high sensitivity of the intracavity arrangement allowed very strong double-resonance and two-photon transition signals to be observed with high microwave-frequency scan-rates (1 GHz/min), and low microwave pumping powers (≦10mW/cm2).
      
In this way an idler frequency scan of 100-150?GHz could be obtained, after which the signal frequency hops ahead over the FSR of the intracavity etalon of the OPO (207?GHz).
      
Low noise, mode-by-mode absorption spectra are recorded at a high acquisition rate (laser frequency scan greater than 400?GHz/s) and covering four orders of magnitude in absorption coefficient.
      
更多          
  frequency sweep
Fatigue crack growth rate test using a frequency sweep method
      
Fatigue crack propagation characteristics of a diesel engine crankshaft are studied by measuring the fatigue crack growth rate using a frequency sweep method on a resonant fatigue test rig.
      
A novel criterion for the thermorheologically simple material, and a procedure to calculate the shift factor from the angular frequency sweep and temperature ramp data were presented.
      
Various dynamic mechanical tests (strain sweep, frequency sweep, and time sweep) were performed to estimate viscoelastic characteristics and fatigue behavior.
      
Active head oscillations were performed at four discrete frequencies (0.12, 0.32, 0.80, 2.0 Hz) and over a frequency sweep between 0.1 and 2.0 Hz.
      
更多          
  frequency scanning
In the second case, the Brewster reflection conditions are not realized, and the variations in the intensity of the reflected light observed upon frequency scanning are smaller.
      
A diplexer of this type can be used for discrete frequency scanning of high-power wave beams in systems for the suppression of the hydrodynamic instabilities of plasma in magnetic traps.
      
Amorphous carbon films were examined by low frequency scanning-probe acoustic microscopy (LF-SPAM).
      
Our results showed that the low frequency scanning-probe acoustic microscopy is a useful method for imaging subsurface defects with high resolution.
      
Frequency scanning of the laser is provided by acoustooptic modulation.
      
更多          
  frequency sweeping
Microwave pulses with different frequencies are obtained by frequency sweeping.
      
Frequency sweeping of emission from heterojunction quantum lasers with pump current modulation
      
Major features of frequency sweeping of emission from heterojunction quantum lasers
      
Laser frequency sweeping does not occur for low current modulation frequencies, corresponding to realization of the quasisteady-state lasing regime.
      
At large amplitudes, nonlinear interactions overwhelm the dissipation causing frequency sweeping and new modes to be excited.
      
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