-
公开(公告)号：US06556967B1
公开(公告)日：2003-04-29
申请号：US09266811
申请日：1999-03-12
IPC分类号： G10L1520
CPC分类号： G10L25/78
摘要： The present invention is a device for and method of detecting voice activity by receiving a signal; computing the absolute value of the signal; squaring the absolute value; low pass filtering the squared result; computing the mean of the filtered signal; subtracting the mean from the filtered result; padding the mean subtracted result with zeros to form a value that is a power of two if the result is not already a power of two; computing a DFFT of the power of two result; normalizing the DFFT result of the last step; computing a mean of the normalization; computing a variance of the normalization; computing a power ratio of the normalization; classifying the mean, variance and power ratio as speech or non-speech based on how this feature vector compares to similarly constructed feature vectors of known speech and non-speech. The voice activity detector includes an absolute value squarer; a low pass filter; a mean subtractor; a zero padder; a DFFT; a normalizer; and a classifier.
摘要翻译： 本发明是一种通过接收信号来检测语音活动的装置和方法， 计算信号的绝对值; 平方的绝对值; 低通滤波平方结果; 计算滤波信号的平均值; 从滤波结果中减去均值; 使用零填充平均减去的结果，以形成一个值，如果结果还不是2的幂，则为2的幂; 计算两个结果的幂的DFFT; 归一化最后一步的DFFT结果; 计算正常化的平均值; 计算归一化的方差; 计算正常化的功率比; 基于该特征向量与已知语音和非语音的类似构造的特征向量进行比较，将均值，方差和功率比分类为语音或非语音。 语音活动检测器包括绝对值平方; 低通滤波器; 平均减法器 零pad 一个DFFT; 归一化器 和分类器。
-
公开(公告)号：US07545325B1
公开(公告)日：2009-06-09
申请号：US11703040
申请日：2007-02-06
申请人： Douglas J. Nelson , David C. Smith
发明人： Douglas J. Nelson , David C. Smith
IPC分类号： G01S1/24
CPC分类号： G01S5/12
摘要： The present invention is a method of finding propagation time and velocity of a transmitter. Specifically, receiving a signal at two or more receivers and using the scalar time relationship to determine propagation time and velocity of the transmitter for the purpose of location of the transmitter. This method is useful for both narrowband and broadband applications with increased accuracy over previous methods.
摘要翻译： 本发明是一种寻找发射机的传播时间和速度的方法。 具体地，在两个或多个接收机处接收信号并使用标量时间关系来确定发射机的传播时间和速度，以便发射机的位置。 对于窄带和宽带应用，这种方法对于以前的方法具有更高的准确性是有用的。
-
公开(公告)号：US07676046B1
公开(公告)日：2010-03-09
申请号：US11149004
申请日：2005-06-09
申请人： Douglas J. Nelson , David C. Smith
发明人： Douglas J. Nelson , David C. Smith
IPC分类号： H04B17/00
CPC分类号： H04B1/1027
摘要： A method of removing noise and interference from a signal by receiving the signal, calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each estimated instantaneous frequency, if necessary, to correspond to a frequency of the joint time-frequency domain to which it most closely compares, redistributing the elements within the joint time-frequency domain according to the estimated instantaneous frequencies as modified, computing a magnitude for each element in the joint time-frequency domain as redistributed, plotting the results as the time-frequency representation of the signal, identifying in the plot any noise and interference components in the received signal, eliminating from the redistributed joint time-frequency domain elements that correspond to noise and interference, and recovering a signal devoid of noise and interference from the modified redistributed joint time-frequency domain.
摘要翻译： 一种通过接收信号来消除信号的噪声和干扰的方法，计算信号的联合时频域，估计联合时频域的瞬时频率，如有必要，修改每个估计的瞬时频率，以对应于 其最接近比较的联合时频域的频率，根据所修改的估计瞬时频率重新分布联合时频域内的元素，计算重新分配的联合时频域中的每个元素的幅度， 将结果绘制为信号的时间频率表示，在绘图中识别接收到的信号中的任何噪声和干扰分量，消除对应于噪声和干扰的重新分布的联合时频域元素，以及恢复没有 来自改进的再分布联合时频域的噪声和干扰。
-
4.发明授权公开(公告)号：US07755536B1
公开(公告)日：2010-07-13
申请号：US11703042
申请日：2007-02-06
申请人： Douglas J. Nelson , David C. Smith
发明人： Douglas J. Nelson , David C. Smith
IPC分类号： G01S13/42
CPC分类号： G01S13/582
摘要： The present invention is a method of finding range and velocity of a target in a radar system using a time scale factor. Specifically, sending at least one signal from at least one transmitter to a target. A return signal is then received from the target at each transmitter and the elapsed time is recorded. The range to the target and velocity of the target are calculated based on a time scale factor of the recorded elapsed times. These values are appropriately output to the user.
摘要翻译： 本发明是使用时间比例因子在雷达系统中求出目标的范围和速度的方法。 具体地，将至少一个信号从至少一个发射机发送到目标。 然后在每个发射机处从目标接收返回信号，并记录经过的时间。 基于记录的经过时间的时间比例因子计算目标的目标和速度的范围。 这些值适当地输出给用户。
-
公开(公告)号：US07658851B2
公开(公告)日：2010-02-09
申请号：US10977989
申请日：2004-10-29
申请人： Douglas J. Nelson , Robert Rawson
发明人： Douglas J. Nelson , Robert Rawson
IPC分类号： C02F3/00
摘要： A device and method for growing aerobic and facultatively anaerobic bacteria such as Pseudomonas Fluorescens, Bacillus subtilis, Bacillus licheniformis, Starkeya novella and various autotrophic sulfur metabolizing bacteria, along with methods for releasing these bacteria into suspended growth or fixed film wastewater treatment zones such as soil or media, for the purposes of bioremediation and the removal of nitrogen, sulfur, and carbon wastes.
摘要翻译： 用于生长有氧和兼性厌氧细菌如荧光假单胞菌，枯草芽孢杆菌，地衣芽孢杆菌，Starkeya novella和各种自养硫代谢细菌的装置和方法，以及将这些细菌释放到悬浮生长或固定膜废水处理区如土壤中的方法 或介质，用于生物修复和除去氮，硫和碳废物。
-
6.发明授权Method of generating time-frequency signal representation preserving phase information 有权产生保持相位信息的时频信号表示的方法公开(公告)号：US07457756B1
公开(公告)日：2008-11-25
申请号：US11149005
申请日：2005-06-09
摘要： A method of generating a time-frequency representation of a signal that preserves phase information by receiving the signal, calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each estimated instantaneous frequency, if necessary, to correspond to a frequency of the joint time-frequency domain to which it most closely compares, redistributing the elements within the joint time-frequency domain according to the estimated instantaneous frequencies as modified, computing a magnitude for each element in the joint time-frequency domain as redistributed, and plotting the results as the time-frequency representation of the signal.
摘要翻译： 一种产生信号的时间频率表示的方法，该信号通过接收信号来保存相位信息，计算信号的联合时频域，估计联合时频域的瞬时频率，修改每个估计的瞬时频率，如果 必须对应于其最接近比较的联合时频域的频率，根据所修改的估计瞬时频率重新分配联合时频域内的元素，计算联合时间中每个元素的幅度 - 重新分配的频域，并将结果绘制为信号的时间 - 频率表示。
-
公开(公告)号：US08275077B1
公开(公告)日：2012-09-25
申请号：US12925395
申请日：2010-10-13
申请人： Douglas J. Nelson
发明人： Douglas J. Nelson
CPC分类号： H04L27/2278 , H04L2027/0032 , H04L2027/0046 , H04L2027/0067
摘要： The present invention pertains to demodulation of GMSK signals by estimating a carrier frequency of the signal having a carrier residual, basebanding the signal, tracking the signal's carrier frequency, removing the carrier residual, detecting a data burst, generating a bank of poly-bit matched filters, applying the bank of poly-bit matched filters to the signal, determining a magnitude and phase of the output of each poly-bit filter of the bank of poly-bit matched filters, determining a maximum magnitude, determining the location of a baud center, generating a plurality of correlation signals by applying the bank of poly-bit matched filters at the baud center, estimating a carrier phase, removing the estimated carrier phase, applying a Viterbi decoding algorithm to the signal, and estimating the transmitted data sequence.
摘要翻译： 本发明涉及通过估计具有载波余量的信号的载波频率，对该信号进行基带化，跟踪信号的载波频率，去除载波残余，检测数据脉冲串，产生一个多位匹配的信号组来解调GMSK信号 滤波器，将多比特匹配滤波器组应用于信号，确定多比特匹配滤波器组的每个多位滤波器的输出的幅度和相位，确定最大幅度，确定波特率的位置 通过在波特中心施加多比特匹配滤波器组来产生多个相关信号，估计载波相位，去除估计的载波相位，对该信号应用维特比解码算法，以及估计所发送的数据序列。
-
8.发明授权公开(公告)号：US07492814B1
公开(公告)日：2009-02-17
申请号：US11151173
申请日：2005-06-09
申请人： Douglas J. Nelson
发明人： Douglas J. Nelson
IPC分类号： H04B17/00
CPC分类号： G10L21/0208
摘要： Removing noise and interference from a signal by calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each estimated instantaneous frequency, if necessary, to correspond to a frequency of the joint time-frequency domain to which it most closely compares, redistributing elements within the joint time-frequency domain according to the modified instantaneous frequencies, computing a magnitude for each element in the redistributed joint time-frequency domain, plotting the results, identifying peak values, eliminating from the redistributed joint time-frequency domain elements that do not correspond to the peak values, identifying noise and interference in the peak values, eliminating the noise and the interference from the redistributed joint time-frequency domain elements, and recovering a signal devoid of noise and interference from the modified redistributed joint time-frequency domain.
摘要翻译： 通过计算信号的联合时频域来消除信号的噪声和干扰，估计联合时频域的瞬时频率，如果需要，修改每个估计的瞬时频率，以对应于联合时频的频率 其最接近比较的领域，根据修改的瞬时频率在联合时频域内重新分配元素，计算重新分布的联合时频域中的每个元素的幅度，绘制结果，识别峰值，消除 重新分布的不符合峰值的联合时域元素，识别峰值中的噪声和干扰，消除重新分布的联合时域元素的噪声和干扰，以及恢复没有噪声和干扰的信号 从修改的重新分配的联合时频域。
-
公开(公告)号：US20090321350A1
公开(公告)日：2009-12-31
申请号：US10977989
申请日：2004-10-29
申请人： Douglas J. Nelson , Robert Rawson
发明人： Douglas J. Nelson , Robert Rawson
摘要： A device and method for growing aerobic and facultatively anaerobic bacteria such as Pseudomonas Fluorescens, Bacillus subtilus, Bacillus lichenoformis, Starkeya novella and various autotrophic sulfur metabolizing bacteria, along with methods for releasing these bacteria into suspended growth or fixed film wastewater treatment zones such as soil or media, for the purposes of bioremediation and the removal of nitrogen, sulfur, and carbon wastes.
摘要翻译： 用于生长有氧和兼性厌氧细菌如荧光假单胞菌，枯草芽孢杆菌，地衣芽孢杆菌，Starkeya novella和各种自养硫代谢细菌的装置和方法，以及将这些细菌释放到悬浮生长或固定膜废水处理区如土壤中的方法 或介质，用于生物修复和除去氮，硫和碳废物。
-
公开(公告)号：US5133159A
公开(公告)日：1992-07-28
申请号：US629784
申请日：1990-12-18
申请人： Douglas J. Nelson
发明人： Douglas J. Nelson
IPC分类号： B24B31/00
CPC分类号： B29C71/0009 , B24B13/0006 , B24B31/00 , B29C37/02 , B29K2083/00 , B29L2011/0016
摘要： A method for polishing articles manufactured from silicone rubber or silicone elastomers is disclosed. This method includes tumble-polishing in a receptacle charged with polishing objects, an alcohol solvent, and silicone articles for a period of time and at a rotation speed sufficient to remove surface irregularities and produce the desired finish and/or improve the optical transparency of the silicone articles. This method is particularly useful in the polishing of biomedical articles such as intraocular or soft contact lenses, tips of cannulae, and articles such as O-rings for precision mechanical devices.
摘要翻译： 公开了一种用于研磨由硅橡胶或硅橡胶制成的制品的方法。 该方法包括在装有抛光对象，醇溶剂和硅酮制品的容器中滚动抛光一段时间并以足以消除表面不规则性并产生所需光洁度和/或提高所需光洁度的光学透明度的旋转速度 硅胶制品。 该方法特别可用于抛光生物医学制品如眼内或软性隐形眼镜，套管尖端和用于精密机械装置的诸如O形环的制品。
-
-
-
-
-
-
-
-
-
搜索结果
14 条记录 (耗时 0.02 秒)