查询词典 at the threshold of

The paper introduces relation between wavelet transform and Lipschitz exponent and analyzes characteristic of signal and noise under wavelet analysis. Threshold de-noising method is introduced mostly at last.

其次，在陀螺漂移信号小波基选取的基础上，系统地将bior双正交小波应用到陀螺仪信号处理中，得到了较好的去噪效果。

Phenological observation data of plant communities from 1982 to 1996 at 5 sites and a method for phenological cumulative frequency modeling were used to determine the beginning dates of local phenological seasons and their corresponding threshold values of normalized difference vegetation index in each year.

利用1982～1996年5个站点的植物群落物候观测数据和物候累积频率拟合法，划分各站逐年的植被物候季节，并确定各季节初日对应的当地归一化差值植被指数阈值。

A detection method of double-threshold constant false alarm movement object on double-base synthetic aperture radar includes finalizing distance compression of various pulse-sampling, dividing orientation time to be multiple CPI, carrying out FFT in each CPI to enter orientation frequency domain, comparing data amplitude of frequency channel at external of clutter region with the first threshold and outputting point trace, making coagulation on point trace, making Hough transform in point trace domain and making decision of the second threshold.

本发明涉及一种用于双基地合成孔径雷达的双门限恒虚警运动目标检测方法，其特征在于：1对每个脉冲采样完成距离压缩；2把方位时间分割成多个相干处理间隔；3在每个CPI内做快速傅立叶变换进入方位频域；4把杂波区外的频率通道的数据幅度和第一门限比较做判决并输出点迹；5点迹凝聚；6在点迹域做Hough变换并做第二门限判决。

Results The patients were predominently female teenagers with a history of gradual onset of bilateral hearing loss, pure tone audiometry revealed symmetric ascending audiograms with moderate hearing loss at frequencies below 1 kHz, but relatively normal hearing at 2 kHz and above. Speech reception thresholds were between 40 to 85 dB HL, discrimination score was from 29% to 68%. Stapedial reflex, auditory brainstem response and compound action potentials were absent or threshold elevated disproportionately to the pure tone threshold. All of the patients had normal cochlear microphonics and robust spontaneously and transiently evoked otoacoustic emissions, the TEOAE showed no contralateral suppression effects as seen in normal subjects.

结果 该病多在青春期后起病，女性较多发，表现为渐进性双耳对称性听力下降，纯音听力以低频损失为主，语言接受阈升高，分辨率下降，镫骨肌反射及ABR引不出或阈值明显升高与纯音听力不成比例，耳蜗微音器电位正常，听神经动作电位引不出，耳声发射波幅高、时程长且不为对侧声刺激所抑制。

Because a stimulus does not suddenly become clearly detectable at all times at specific intensity, the operational definition of absolute threshold is the stimulus level at which a stimulus is detected half the time.

因为刺激并不是突然间在某种强度变得能轻易被觉察到，所以关于绝对阈限的定义是--能在一半的次数中被被试所觉察到的刺激水平。

Methods The clinical application of 25 normal subjects were stimulated at 1Hz at stimulus intensities corresponding to threshold, recording from the abductor pollicis brevis muscle belly.

25例健康个体，于正中神经腕点处刺激，在拇短展肌肌腹内接收，刺激频率为1 Hz，刺激强度为阈强度上下。

The injury threshold values of most plants are observed at pH 2.0~3.5 designed in this experiment. However, those of Brassia campestris, Viola tricolors and Zephyranthes candida are not fixed at pH 2.0. It indicates that three herbaceous ornamental plants own a strong resistance to acid rain.

在设定的酸雨胁迫强度(pH 2.0~3.5)下，多数植物的伤害阈值可被确定，惟有羽衣甘蓝、三色堇和葱兰在pH2.0酸雨胁迫下仍无法确定其伤害阈值，表明此3种草本观赏植物对酸雨有极强抗性。

Provided is a threshold determining device (10) for determining a threshold, at which the ratio for the coincidence/incoincidence of each data to become less than a required value becomes a required assurance value or more.

提供了一种用于确定阈值的阈值确定设备，在该阈值，小于要求值的每个数据的假匹配率是要求的保证值或者更大。

The method includes dividing a digital image, formed from M rows and N columns of pixels, into a plurality of band-shaped areas by partitioning at each of a prescribed number of rows; averaging, for each column, the gradation values of pixels in said band-shaped areas for each of said plurality of band-shaped areas; computing an approximation line which approximates, in each of said plurality of band-shaped areas, a distribution of said average of gradation values; and judging whether there exists a succession of d columns at which the difference between said gradation value derived from said approximation line and said average of gradation values for each column exceeds a prescribed threshold.

该方法包括：通过以规定行数为单位进行分割，将由M行N列个像素形成的数字图像划分为多个带状区域；对于所述多个带状区域的每一个，针对各列来对所述带状区域中的像素的浓淡值求平均；计算近似线，该近似线在所述多个带状区域的每一个中近似于所述浓淡值的平均值的分布；并且判断是否存在如下连续的d个列，在所述连续的d个列中，从所述近似线得到的所述浓淡值与针对各列的所述浓淡值的平均值之间的差值超出一指定阈值。

The invention discloses a multi-cell pilot frequency distribution method applied in an orthogonal frequency-division multiplexing system, which comprises the following steps: generating at least two different original frequency hopping sequences according to a predetermined pilot frequency domain; generating a combined frequency hopping sequence (having length greater than that of the original frequency hopping sequences) from at least two different original frequency hopping sequences; generating different pilot frequency structures satisfying collision threshold requirements based on the combined frequency hopping sequence; and distributing the generated pilot frequency structures to each cell.

本发明公开了一种多小区导频分配的方法，用于正交频分复用系统，按照预定的导频频域间隔生成至少两种不同的原始跳频序列；将至少两种不同的所述原始跳频序列生成组合跳频序列，所述组合跳频序列的长度大于所述原始跳频序列的长度；基于所述组合跳频序列生成满足碰撞门限要求的不同导频结构；将所述生成的导频结构分配给各小区。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。