背景噪声

National acoustic laboratories, 126 greville street, nsw 2067, australia objective to obtain the slope and srt of the p-i function for mandarin short sentences in 4-talker babble noise, and evaluate/adjust the homogeneity all sentences individually.

目的 获得嘈杂语噪声背景下汉语短句识别率-信噪比（performance-intensity， p-i）函数的斜率和50%的得分所对应的信噪比(记为snr50)，并对所有短句的同质性进行评估和调整。

National Acoustic Laboratories, 126 Greville Street, NSW 2067, Australia Objective To obtain the slope and SRT of the P-I function for Mandarin short sentences in 4-talker babble noise, and uate/adjust the homogeneity all sentences individually.

目的 获得嘈杂语噪声背景下汉语短句识别率-信噪比（Performance-Intensity， P-I）函数的斜率和50%的得分所对应的信噪比(记为SNR50)，并对所有短句的同质性进行评估和调整。

Though several leak detecting methods are available, they are not ideal inapplication scope, including responses speed and accuracy of leak localization. In thisdissertation, according to the conditions of pipeline transportation in our country,research is carried out on crude oil transported pipelines leak detection and locationtheory and the study on its supervisory system is given.

本文结合我国管道输送的实际情况，针对原油管道泄漏检测技术及其运行监测系统进行了深入的研究，主要进行了以下几个方面的工作：将小波变换技术引入到负压波特征拐点的捕捉，利用连续小波变换时间-尺度特性检测信号的奇异点，能够有效的检测出强噪声背景下的信号边沿，此外，还提出了负压波法泄漏检测中误报警消除的多种方法。

Second, the theory of scale space was used to design a new operator for target detection and tracking. Then, the property of scale invariant was analyzed and proved, and a tracking scheme based on the gradient LOG operator was proposed. Experimental results show that the gradient LOG operator is appropriate to describe small target in complex background, and the detection precision is in the level of sub-pixel.

然后根据尺度空间的基本理论构造了一种针对该成像模型的目标检测算子，分析并证明了该算子具有尺度不变性的优点，设计并实现了基于梯度LOG 算子的小目标跟踪方案，实验结果表明：梯度LOG 算子能够较好地跟踪复杂背景中的光团目标，定位精度可达亚像素级，且具有计算量小，抗噪声能力强等优点。

Based studies were done on radiation spectrum, voltage to current character and modulation property of white LEDs when they are used as optical transmitters. Then the configuration and systematic design techniques are concentrated concerning white LED lighting source communication with numerical analyses and computer simulations done as well as high speed modulation techniques, visible light receiver design and means to alleviate inter symbol interference along with background noise problem.

在对白光LED用作通信光源时的光谱特性、伏安特性、调制特性等物理特性做深入分析的基础上，重点研究了白光LED照明光源通信系统的组成结构和系统设计，进行了数学计算分析模拟，并设计出了白光LED高速调制电路和可见光接收电路，并就如何削弱码间串扰和背景光噪声对通信系统的影响进行了讨论分析。

BACKGROUND: Ear surgery using mastoid drills can lead to noise-induced hearing loss.

背景：在耳部手术中使用tilde；？突钻头可能会引起噪声性耳聋。

With the computer simulation and Runge-Kutta algorithm here, the new method of the adiabatic elimination SR principle for detecting a weak signal of high frequency is analyzed from the strong noise.

应用计算机仿真技术，基于Runge-Kutta算法，提出了频率变换的随机共振方法，以实现强噪声背景下大频率周期信号的检测。

The method is applicable to eliminate noise in image, which is made up of many monochromatic targets and complex background.

这种方法主要适用于由多个单色目标和复杂背景等组成的彩色图象的噪声抑制。

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 scalp electrodes were used for detection of VEPs in the occiput.

本文研究了采用小波变换提取强噪声背景下视觉诱发电位的方法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。