查询词典 signal

In order to decrease the measuring error of signal processing in laser Doppler velocimeter, frequency spectrum correction methods for lacer Doppler signal were proposed. Basic principles of energy centrobaric correction, ratio correction and phase difference correction were expounded. The three methods processing ideal sinusoidal signals was simulated with different signal frequencies, and so was the ratio method processing sinusoidal signals with different noises and signal to noise ratios.

在激光多普勒测速仪中，为了减小由信号处理算法带来的测量误差，提出运用频谱校正算法对多普勒信号的频谱进行校正，详细阐述了能量重心法、比值法和相位差法3种离散频谱校正算法的基本原理，运用这3种算法对理想正弦信号进行仿真，并运用比值法对信号施加不同频率和信噪比的噪音下的正弦信号和实测的多普勒信号进行仿真及实验研究。

The company mainly produces air breathing apparatus, positive pressure air respirators, emergency escape breathing apparatus devices | EEBD, marine oil-water separators | Marine oil-water separator devices | Marine Bilge oil water separator devices, marine fire equipment | fire equipment, positive pressure breathing apparatus air cylinders standby, marine fire extinguisher, PQ8.C foam-type portable air gun device, the international shore connection, fire insulation clothing | clothing insulation, fire anti-chemical suits, many with water cannon, fire-resistant rope | refractory lifeline, explosion-proof lights, the release of hydrostatic pressure, and heat appliances, life jackets, life-saving thermal insulation suits, life buoy, life jacket lights, life buoy lights, liferaft lights, life raft racks, marine oil-water separator devices, marine red flame signal, Marine orange smoke signal, lifebuoy from the bright lights floating smoke signal, lifebuoy with orange smoke signal, Marine line-throwing equipment, marine life-saving throw rope, and marine oil-water separator devices, etc. Products.

公司主要生产的空气呼吸器，正压式空气呼吸器，紧急逃生呼吸器装置|EEBD，船用油水分离器|船用油水分离器装置|船用舱底油污水分离器装置，船用消防员装备|消防员装备，正压式空气呼吸器备用气瓶，船用灭火器，PQ8.C型手提式空气泡沫枪装置，国际通岸接头，消防隔热服|隔热服，消防防化服，多用水枪，耐火绳|耐火救生绳，防爆灯，静水压力释放器，保温用具，救生衣，保温救生服，救生圈，救生衣灯，救生圈灯，救生筏灯，救生筏架，船用油水分离器装置，船用红色火焰信号，船用橙色烟雾信号，救生圈自亮浮灯烟雾信号，救生圈用橙色烟雾信号，船用抛绳设备，船用救生抛绳器，船用油水分离器装置等产品。

Optical signal that the receiver receives , shaking the light wave produced with the receiver , on terms that meet the phase place and match and the amplitude is matched, mix it frequently , output the square of intermediate frequency signal electric current in direct radio of sum of the intensity of optical signal produced with optical signal , and receiver .

接收机接收到的光信号、与接收机内部振荡所产生的光波，在满足相位匹配和振幅匹配的条件下，进行混频，输出与光信号、和接收机产生之光信号强度之和的平方成正比的中频信号电流。

The microseism signal automatic recognition system can pick up and analysis P wave 、S wave and the interfering signal in the microseism signal caused by the mining tremor, determine the time of signal arrival and amplitude, energy etc.

矿山微震信号自动识别系统可以对由矿震所引发的微震信号进行拾取并分析P波、S波及干扰信号，确定信号到时及振幅、能量等微震属性，为预测和防治矿震灾害提供了必要参数。

This thesis is focus on the detection and processing of fluorescence signal based on TRFIA, the signal includes single signal and multidrop signal which is biological chip.

首先分析了荧光信号产生的机理，在此基础上考虑到荧光信号十分微弱的特点和在强噪声背景环境下检测，设计了基于数字BOXCAR的信号检测系统。

The controller receives, analyzes and processes the command input by operator via the man-machine interface, to adjust and control the controllable light signal generator according to the analysis processing result and the spectrum result checked by the light checker, the controller outputs the adjustment and result via the man-machine interface to the operator, to output light signal for the result of adjustment and control on the controllable light signal generator, via the light coupler to be coupled partly and feedback to the light checker to be checked, thereby forming a closed-circuit, while the light signal coupled to the light output via the light coupler reaches user target spectrum demand.

本发明公开了一种实现光信噪比可调节的光信号源装置及控制方法，所述装置包括：控制器、人机接口、可控光信号发生器、光耦合器、光信号检测器、光信号输出口；控制器接收操作者输入给人机接口的指令并分析和处理，运用分析处理结果、并结合光检测器检测的光谱结果数据来调节和控制可控光信号发生器，控制器将调节过程和调节结果通过人机接口输出给操作者，对可控光信号发生器调节和控制的结果输出光信号通过光耦合器耦合一部分又反馈给光检测器检测，这样形成一个闭环控制，使得通过光耦合器耦合到光输出口的光信号达到用户目标光谱要求。

It is found that the change of the frequency characteristics of chaotic system occurs mainly at the frequency band of the chaotic system, in which the input signal exists. The amplitude of the input signal doesn't influence the distortion of the output signal when masking signal is extracted by Oppenheim's chaotic masking.

研究发现，混沌系统频率特性的变化主要发生在输入信号的频率位於混沌系统频带内的情况下；输入信号幅度的大小，不影响输出信号的失真。

It's very important to process digital orthorhombic demodulation. The orthorhombic signal holds all of the information of the received signal It contains swing and phase of the received signal which can be used to pick-up the available signal.

对接收到的高频信号进行全数字正交相干检波是十分重要的，它保留了信号复包络的完整信息，包括振幅和相位因此可以很好的提取有用信号。。。

Results Metaphysis osteoporosis was observed on X-ray and CT in acute stage, the midsection of infarct of bone was isointensity on T1WI and iso/hyperintensity signal on T2WI, the edge of infarct of bone was ring-shaped hypointensity on T1WI and hyperintensity signal on T2WI. Small worm-eaten change and stippled calcification was observed on X-ray and CT in subacute stage, the infarct of bone was iso/hypointensity on T1WI and iso/hyperintensity signal on T2WI, the edge of infarct of bone was ring-shaped hypointensity on T1WI and hyperintensity signal on T2WI. Irregular and wriggle osteosclerosis was observed on X-ray and CT in chronic stage, was hypointensity on T1WI and T2WI.

结果 骨梗死急性期X线、CT表现为干骺端骨质疏松，MR T1WI骨梗死灶中央部分呈等至高信号，T2WI呈高信号，T1WI骨梗死灶边缘呈环形低信号，T2WI呈环形高信号；亚急性期X线、CT表现为小的虫噬样改变，伴有斑点状钙化，MR T1WI骨梗死灶呈等或低信号，T2WI呈等或稍高信号，T1WI骨梗死灶边缘呈环形低信号，T2WI呈环形高信号；慢性期X线、CT表现为不规则状、蜿蜒状骨质硬化，MR T1WI和T2WI均呈低信号。

The invention discloses a passive optical network signal monitoring method comprising the following steps: obtaining a PON signal from one side of an optical line terminal and an optical network unit, detecting the photoelectric property parameter of the obtained PON signal and judging whether the detected photoelectric property parameter lower than a predeterminate photoelectric property parameter threshold or not, if it is, a corresponding alarming signal is transmitted to the OLT.

本发明公开了一种无源光网络信号监控方法，包括以下步骤：获取来自光线路终端和光网络单元中一侧的PON信号，检测所获取的PON信号的光电性能参数；和判断所检测出的光电性能参数是否低于预设的光电性能参数阈值，如果是，则发送对应设置的告警信号给所述OLT。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了