查询词典 Signal-to-Noise

Experiment results show that this method can be used for effective compression and precise reconstruction of the domestic frequency shift signal, UM71 signal and ZPW-2000 signal, being characteristic of simple computation, flexible-scheme compression and good adaptability to practical requirements of railway sites.

实验表明，该方法可以对目前铁路现场主要使用的国产移频信号、UM71信号和ZPW-2000信号进行有效压缩和精确重构，且具有算法简单和方案灵活等特点，能够满足铁路现场实际运用的需要。

Shifting the signal above 0V results in a signal that is similar to a positive, single-ended analog signal.

平移信号到0V以上，导致信号类似于一个正单向模拟信号。

Digital signal processor DSP and realizes each kind of digital signal processing algorithm prominent merit fast by its unique structure, in the correspondence, the radar, the sound navigation and ranging, voice signal processing, the imagery processing, the high-speed control and the instrumentation equipment and so on numerous domains has obtained the widespread application.

数字信号处理器DSP以其独特的结构和快速实现各种数字信号处理算法的突出优点，在通信、雷达、声纳、语音信号处理、图象处理、高速控制和仪器设备等众多领域获得了广泛应用。

In the case of the input signal being spectrally colored, the conventional adaptive feedback cancellation algorithm suffers from bias caused by the correlation between the output signal and the input signal.

当系统输入信号是有色信号时，传统的自适应反馈抵消算法会由于系统的输出和输入信号存在相关性而造成辨识反馈路径存在偏差，从而导致反馈抵消性能的降低。

In this paper, it is proved that the polar signal obtained from the symbolization of an ergodic random signal is stationary and that the autocorrelation function of the polar signal is ergodic.

本文证明了各态历经的随机信号经符号化处理后，得到的极性信号是干稳的，极性相关函数是各态历经的。

Through the analysis on spurious signal, we concluded that the sources of spurious signal generation are due to fabrication defects in the strip—coupling region and the defects in the diode array, so the advanced surface technique is the guarantee to spurious signal suppression.

通过对杂波的分析，我们得出结论：杂波主要是由相互作用区的缺陷以及二极管阵列的缺陷所产生，因此，杂波的抑制要靠良好的工艺来保障。

The frequency test scheme of this cymometer is enumerative. In this system, vibratory circuit output a time signal of strobe to acquire the frequency of the geodesic signal by count the pulse after the geodesic signal is modulated.

该频率计采用计数式测频方案，由振荡电路产生标准闸门时间信号，对被测信号整形处理后进行脉冲计数直接得到被测信号的频率值。

Sound source signal and treatment: The key part of the system is a 12 channels attunement of the PV series .Cooperating with signal from the platform, DVD signal, the compere can give a speech through the UHF wireless microphone or microphone on the desk. And wireless microphone can be used when in the question and answer part.A sound feedback suppresser will be used in the system, so it can improve the sound emitting plus.

音源信号及处理部分；采用美国百威公司的PV系列的12通道调音台作系统心脏，配合来自讲台的电脑信号、DVD播放信号，主讲人采用UHF频段的手持式无线麦克风及台式麦克风发言，并设置手持无线麦克风作为提问使用，系统添置声反馈抑制器使传声增益得到最大的提高。

The key of this task is how could we get the orderliness of train traveling signal. There are some introduction to the analyse ways of train's approaching signal. It emphasizes on the analyse of using syntony demodulation technology to final the long-distance coming train. At the same time, it gives a preliminary analyse in the signal for different cases, takes a research on the identified technology for the coming train, designs and assembles the hardware and software of this system. All of them have got past the test on the spot and got a satisfying result""

课题中的关键是如何得到列车运行信号的特征规律，在本文中对这些列车接近信号的一些分析方法作了介绍，着重分析了采用共振解调技术发现远程来车的信号，同时针对不同情况下的信号进行了初步分析，研究了来车的识别技术，并对系统的软硬件进行了设计和组装，通过了现场试验，得到了令人满意的结果

Methods The clinical manifestations and the plasma ammonia levels were analyzed in l7 patients with HE , who underwent EEG , CT and MRI examinations Results Fifteen patients had abnormal EEG findings characterized by lowered basic rhythm, moderate to high amplitude θ wave activity, and sporadic δ wave and triphasic wave Fourteen patients had abnormal MRI findings , including increased signal in the bilateral globus pallidus (14/17), putmen (4/17) and tegmentum of the midbrain (7/17) in T1WI without corresponding alterations in the signal Intensity in T2WI T2 FLAIR demonstrated increased signal in the bilateral white matter of the cerebral hemispheres.

总结17例各种原因引起的肝性脑病患者的临床表现、血氨水平，对全部病例进行EEG、颅脑CT、MRI检查。结果 17例肝性脑病患者EEG异常15例，主要表现为：基本节律慢化；中波～高波幅θ活动；散在的δ波、三相波。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。