In some special scenarios, such as road tunnels or tall buildings, the satellite signal is weak or indiscernible.
而在某些特殊的场景，如隧道或高楼路段，卫星信号较弱甚至无信号。
PD signal is weak signal, so the first problem of on-line monitoring is how to pick up the weak anti-stationary random signal.
由于局放信号属于弱脉冲信号，因此实现在线监测的首要问题是如何从强干扰中提取弱的非平稳随机信号。
In both single sensor and triple sensor designs, the weak signal created by the sensors is amplified.
在单传感器和三传感器设计中，传感器产生的微弱信号都会被放大。
The radiation "signal" is weak, easily swamped by other factors that degrade health, such as smoking, alcoholism, and poor nutrition.
辐射“信号”非常微弱，而诸如吸烟、酗酒以及营养不良等诸多因素都会导致健康恶化。
The experimental results show that the detector is very effective on extracting weak video signal from strong mixture noise.
实验结果表明，这种检测器对于从强混合噪声中提取弱视频信号是非常有效的。
Pipeline signal and power supply for the separation, although it is weak, but strict requirements must be strong.
管线的信号和电源为分开，虽然是弱电，但是严格要求是必须强、弱电线管分开敷设。
Sensor is installed as far away from high-power devices, because its own output signal is relatively weak, typically millivolts, vulnerable to interference.
传感器的安装位置尽量远离大功率设备，因为它本身的输出信号就比较弱，通常为毫伏级，极易受到干扰。
"There are some signals, " Papakostas says."The problem thus far is that if you looked at a single element, a single marker or disease area, the signal was weak."
“确是有一些标识，”Papakostas说，“但问题是，如果仅盯着单一的元素，如单个标记物或病损区，那么标识性就会变弱。”
Lock-in amplifying (LIA) is one of important means for weak signal detection.
锁相放大是微弱信号检测的重要手段。
However, nothing is perfect, and sometimes you may lose your connection or experience a weak signal.
然而，天底下没有十全十美的，有时你可能失去你的经验方面还是弱信号。
Indeed, that is how a radio antenna works, except that the weak current generated by the radio waves has to be amplified to do its job of carrying a signal round a radio.
而收音机的天线就是这样工作的，只不过电波所产生的电流非常弱，需要进一步放大从而完成信号传输。
Five: feeder, the feeder is very important, we must choose good, and we want to know the general antenna distance can't more than 50 m, or receiving signal will become weak.
五：馈线，这个馈线很重要的，我们必须要选择好，而且我们要知道一般的天线距离不能超过50米，要不然接收的信号就会变弱。
That's because the phone USES energy searching for a good signal and, if the signal is very weak, trying to get a better connection.
这是因为手机会使用电能寻找耗得信号，如果信号特别弱，还要试着更好地去连接。
Through casing resistivity logging is an important logging technology, and the difficulty in this technology is the detection of weak signal.
过套管电阻率测井是一项重要的测井技术，该项目的一个难点为微弱信号的检测。
Using the optical chopper to modulate the detected light to make it related to the reference squarewave signal is a common method of locking phase detection of weak signals.
其中利用光学斩光器对被测光进行调制使其与方波参考信号相关是对微弱光信号进行锁相检测的一种常用方法。
So it is important to study the acquisition of weak navigational signal in geostationary orbit environments, and it is a key technique to the application of GPS onboard GEO.
因此，研究高轨环境下微弱导航信号的捕获是极其重要的，它是解决高轨卫星星载GPS应用中的一个关键技术。
An implementation of the weak signal detection in the wideband strong interference is proposed.
提出了一种检测宽带强干扰中弱信号的实现方法。
It is the longer to measure cycles, the stronger the capability of instrument recognition to the weak signal is, it is the less to measure the error.
同时测量周期越长，仪器对弱信号的识别能力越强，测量误差越小。
The simulated extraction of weak frequency variation signal is carried out with the expressed Resonant frequency locking property when system transits from chaotic to great periodic motion.
利用系统从混沌状态到大周期转变时所表现出的共振锁频性质，进行了微弱频率变化信号的仿真提取。
Both on time domain and frequency domain, the detection for lifetime of weak fluorescence signal is studied.
在时域和频域上进行了微弱荧光信号的寿命检测的研究。
In laboratory study, all kinds of noise including chaotic noise, are needed to be generated, which iterated with weak periodic signal is used to be signal source.
实验室内研究需要产生包括混沌噪声在内的各种噪声，并叠加微弱周期信号作为微弱信号检测系统的信号源。
But it needs prior knowledge of speech signal and its classification and decision making capability is weak.
但它存在需要语音信号的先验知识，分类决策能力弱等缺点。
Combining two methods, it is detected and analyzed that the weak signal slowly frequency change accompanied by noise.
结合所提出的两种方法，对带噪声的频变微弱振动信号进行了检测分析。
As a digital programmable chip of signal conditioning chip, PGA309 is mainly used in resistance bridge pressure sensors, it amplifies and outputs the weak signal from the sensor.
PGA309作为数字化可编程信号调理芯片，主要用于电阻桥式压力传感器，将微弱的传感器桥路信号进行放大输出。
Also, the method of correlation detection is adopted to measure the weak signal in this measurement system.
以该方法为基础，具体分析了相关检测技术对于大口径微弱信号检测方法的适用性。
According to the algorithms and the theories which are said, DOA estimation of broadband weak signal under strong interferences is studied.
结合上述的算法和理论，研究了在强干扰背景下的宽带弱信号源的doa估计。
A high speed data collector and buffer, applied to detect weak signal in strong noise, is described in the paper.
本文介绍一种在强噪声下弱信号检测中的高速数据采集缓冲系统。
When exploring and researching on macroscopical and microcosmic world, the weak signal detection is needed.
己们反在探索研讨微观和微观世界中，常常须要检测微强信号。
The weak electric signal from stem and leaf of Rhododendrons is composed with periodic group waves.
杜鹃枝、叶微弱电信号波由具一定的周期性的组峰组成。
The weak electric signal from stem and leaf of Rhododendrons is composed with periodic group waves.
杜鹃枝、叶微弱电信号波由具一定的周期性的组峰组成。
应用推荐