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    • 2. 发明授权
    • Acoustic signature recognition of running vehicles using spectro-temporal dynamic neural network
    • 使用光谱时间动态神经网络的运行车辆的声学签名识别
    • US08111174B2
    • 2012-02-07
    • US12245575
    • 2008-10-03
    • Theodore W. BergerAlireza DibazarBing Lu
    • Theodore W. BergerAlireza DibazarBing Lu
    • G08G1/04
    • G08G1/04G01H3/08G08G1/015G10L25/30G10L25/51
    • A method and apparatus for identifying running vehicles in an area to be monitored using acoustic signature recognition. The apparatus includes an input sensor for capturing an acoustic waveform produced by a vehicle source, and a processing system. The waveform is digitized and divided into frames. Each frame is filtered into a plurality of gammatone filtered signals. At least one spectral feature vector is computed for each frame. The vectors are integrated across a plurality of frames to create a spectro-temporal representation of the vehicle waveform. In a training mode, values from the spectro-temporal representation are used as inputs to a Nonlinear Hebbian learning function to extract acoustic signatures and synaptic weights. In an active mode, the synaptic weights and acoustic signatures are used as patterns in a supervised associative network to identify whether a vehicle is present in the area to be monitored. In response to a vehicle being present, the class of vehicle is identified. Results may be provided to a central computer.
    • 一种用于使用声学签名识别识别待监视区域中的行驶车辆的方法和装置。 该装置包括用于捕获由车辆源产生的声波形的输入传感器和处理系统。 波形被数字化并分成帧。 每个帧被过滤成多个经过Gammatone滤波的信号。 为每个帧计算至少一个光谱特征向量。 矢量被集成在多个帧之间以产生车辆波形的频谱表示。 在训练模式中,来自频谱表示的值被用作非线性Hebbian学习函数的输入,以提取声学签名和突触权重。 在主动模式中,突触权重和声学特征被用作监督关联网络中的模式,以识别车辆是否存在于要监视的区域中。 响应于存在的车辆,识别出车辆等级。 可以向中央计算机提供结果。
    • 3. 发明申请
    • DETECTION AND CLASSIFICATION OF RUNNING VEHICLES BASED ON ACOUSTIC SIGNATURES
    • 基于声学信号的运行车辆的检测和分类
    • US20090115635A1
    • 2009-05-07
    • US12245564
    • 2008-10-03
    • Theodore W. BergerAlireza DibazarBing Lu
    • Theodore W. BergerAlireza DibazarBing Lu
    • G08G1/04H03F99/00
    • G08G1/04G01H3/08G08G1/015G10L25/30G10L25/51
    • A method and apparatus for identifying running vehicles in an area to be monitored using acoustic signature recognition. The apparatus includes an input sensor for capturing an acoustic waveform produced by a vehicle source, and a processing system. The waveform is digitized and divided into frames. Each frame is filtered into a plurality of gammatone filtered signals. At least one spectral feature vector is computed for each frame. The vectors are integrated across a plurality of frames to create a spectro-temporal representation of the vehicle waveform. In a training mode, values from the spectro-temporal representation are used as inputs to a Nonlinear Hebbian learning function to extract acoustic signatures and synaptic weights. In an active mode, the synaptic weights and acoustic signatures are used as patterns in a supervised associative network to identify whether a vehicle is present in the area to be monitored. In response to a vehicle being present, the class of vehicle is identified. Results may be provided to a central computer.
    • 一种用于使用声学签名识别识别待监视区域中的行驶车辆的方法和装置。 该装置包括用于捕获由车辆源产生的声波形的输入传感器和处理系统。 波形被数字化并分成帧。 每个帧被过滤成多个经过Gammatone滤波的信号。 为每个帧计算至少一个光谱特征向量。 矢量被集成在多个帧之间以产生车辆波形的频谱表示。 在训练模式中,来自频谱表示的值被用作非线性Hebbian学习函数的输入,以提取声学签名和突触权重。 在主动模式中,突触权重和声学特征被用作监督关联网络中的模式,以识别车辆是否存在于要监视的区域中。 响应于存在的车辆,识别出车辆等级。 可以向中央计算机提供结果。
    • 7. 发明申请
    • MOLDED REFLECTIVE STRUCTURES FOR LIGHT-EMITTING DIODES
    • 用于发光二极管的模制反射结构
    • US20120262925A1
    • 2012-10-18
    • US13086862
    • 2011-04-14
    • Bing Lu
    • Bing Lu
    • F21V7/06F21V7/22F21V7/00
    • H01L33/60H01L33/486H01L33/501H01L33/507H01L2224/48095H01L2224/48247H01L2224/48257
    • The present disclosure is directed to a molded reflective structure for a light source, which may be a light-emitting diode (“LED”). The structure includes a reflector which defines a cavity therein. The cavity is surrounded by at least one reflective side wall, and has a greatest dimension of less than about 50 mm. The at least one reflective side wall further has an initial reflectance at 460 nm of greater than about 85% and an initial whiteness index of greater than about 80. The reflector is made from a thermoplastic polymer composition that contains a material such that the at least one reflective side wall absorbs light in the ultraviolet and violet region of the electromagnetic spectrum and re-emits light in the blue region.
    • 本公开涉及一种用于光源的模制反射结构,其可以是发光二极管(LED)。 该结构包括在其中限定空腔的反射器。 空腔被至少一个反射侧壁包围,并且具有小于约50mm的最大尺寸。 所述至少一个反射侧壁还具有大于约85%的460nm处的初始反射率和大于约80的初始白度指数。所述反射器由热塑性聚合物组合物制成,所述热塑性聚合物组合物含有至少 一个反射侧壁吸收电磁光谱的紫外线和紫色区域的光,并在蓝色区域再发光。