随机信号

Bilinear Z transform with the design of IIR Butterworth digital low-pass filter, ECG can be achieved in the removal of random noise.

详细说明：用双线性Z变换法设计IIR巴特沃思型数字低通滤波器，能够实现心电信号中随机噪声的去除。

Objective to evaluate the functional recovery of acute spinal cord injuried rats treated with exogenous wnt-3a signal protein administration and to explore its mechanism.methods moderate spinal cord contusion injury was made in 40 adult sprague dawley rats at t10.twenty rats served as contusion controls(group 1).twenty rats were treated with wnt-3a for three days after injury (group 2).the functional recovery of the rats was observed through basso,beattie,bresnahan open field locomotor score.rats were killed at 14 or 28 days after injury,then spinal cords were removed for histopathological examinations,and the expression of the bromodeoxyuridine plus neural cell markers was stained with immunohistochemical method.results rats of two groups receiving a contusive injury recovered substantial function within 1 week.by 28 days,rats in groups 2 scored 7.0 points better on the bbb scores than rats in group 1 group 2=16.94,after 28 days vs.

目的 研究外源性wnt-3a信号蛋白对脊髓损伤的修复作用，并探讨其作用机制。方法取40只成年雌性sd大鼠在t10节段制备适度脊髓挫伤模型。随机从中取20只为损伤对照组(group 1)，另外20只为损伤治疗组(group 2)。脊髓损伤3天后用wnt-3a蛋白治疗。这些大鼠的功能恢复通过basso、beattie、bresnahan开放视野运动评分来观察。这些大鼠分批在损伤后14天或28天被处死，取出损伤节段脊髓用来组织病理学检查，同时用5-溴脱氧尿嘧啶核苷和神经细胞标记物进行免疫组化染色。结果两组大鼠在伤后一周运动功能有明显的恢复。不过，到损伤后28天，我们观察发现，损伤治疗组中的大鼠bbb评分比损伤对照组中的评分高出7.0分左右(group 2∶16.94±1.18，group 1∶9.89±1.29；p.05)，光镜和电镜检查发现wnt-3a蛋白对髓鞘形成和轴突再生有一定的修复效果。

RLT filtration can be used to remove extraneous currents from faradaic current, but it is not suitable for filtering random noise.

但它的缺点是只能处理有规律变化的干扰信号，对随机噪声的滤除则无能为力。

Superscript n) series pseudo-random multi-frequency signal is one of the effective inspiriting fountainheads in geophysical surveying.

2系列伪随机多频信号是一种较为有效的地球物理激励场源。

Objectives To study the expressions of STAT1 and PDGF in lung tissue of pulmonary fibrosis model induced by bleomycin in rats, and discuss the possible mechanism.Methods Thirty Wistar rats were randomly divided into two groups (15 in each group), they were bleomycin group and control group.①The BLM group was intratracheally instilled with belomycin (5mg/kg);② NS group was intratracheally instilled with saline (5mg/kg).

目的 观察肺纤维化鼠肺组织信号转导和转录活化因子1（STAT1）和血小板源性生长因子表达的变化，探讨其在肺纤维化的作用机制方法 30只Wistar大鼠随机分博莱霉素组和对照组，①BLM组：气管内灌注BLM（5mg/kg）诱导肺纤维化；②NS组：气管内灌注NS。

Having analysed notonly the frequency characteristics of signal and random noise but also influence ofnoise upon filter under different signal/noise ratios, authors studied noise elimina-tion using inversion in wavelet trans form domain and then advance frequency- divi-sional inversive noi.

本文通过分析信号与随机噪声的频率犄性及在不同信噪比情况下噪声对滤波器的影响，研究了小波变换域中的庆演去噪情况，提出分频反演去噪方法。

Microseismic events are characterized by high frequency,short duration,and weak energy.They may even be smeared by random noises.

由于微地震事件的频率高，持续时间短，能量小，随机噪声甚至可以淹没有用的微地震信号。

Voice signals in the frequency domain processing, voice is a time-varying, nonstationary random process.

语音信号的频域处理，语音虽然是一个时变、非平稳的随机过程。

The control and synchronistic action is discussed when othermethods of chaotic control and synchronization are expanded in the hyperchaoticsystem.

根据随机过程理论，分析了该信号所呈现的优点，展望了其在保密通讯方面应用的优越性和在其他领域中应用的巨大潜力。

When laser diode illuminates the rough surface moving transversally across the light beam, the feedback light forms the random speckle due to the random pattern of the target surface, causing random fluctuations in the laser output, which is called as self-mixing speckle interference.

让半导体激光器的光学反馈来自垂直地照射的粗糙表面，把光强调制成为随机的散斑信号。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。