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    • 11. 发明授权
    • Extraction of attributes and values from natural language documents
    • 从自然语言文件中提取属性和值
    • US08521745B2
    • 2013-08-27
    • US13158678
    • 2011-06-13
    • Katharina ProbstRayid GhaniAndrew E. FanoMarko KremaYan Liu
    • Katharina ProbstRayid GhaniAndrew E. FanoMarko KremaYan Liu
    • G06F17/30
    • G06F17/2715G06F17/241G06F17/30616
    • One or more classification algorithms are applied to at least one natural language document in order to extract both attributes and values of a given product. Supervised classification algorithms, semi-supervised classification algorithms, unsupervised classification algorithms or combinations of such classification algorithms may be employed for this purpose. The at least one natural language document may be obtained via a public communication network. Two or more attributes (or two or more values) thus identified may be merged to form one or more attribute phrases or value phrases. Once attributes and values have been extracted in this manner, association or linking operations may be performed to establish attribute-value pairs that are descriptive of the product. In a presently preferred embodiment, an (unsupervised) algorithm is used to generate seed attributes and values which can then support a supervised or semi-supervised classification algorithm.
    • 一个或多个分类算法被应用于至少一个自然语言文档,以便提取给定产品的属性和值。 为此,可以采用监督分类算法,半监督分类算法,无监督分类算法或这种分类算法的组合。 可以经由公共通信网络获得至少一个自然语言文档。 如此识别的两个或多个属性(或两个或多个值)可以被合并以形成一个或多个属性短语或值短语。 一旦以这种方式提取了属性和值,就可以执行关联或链接操作来建立描述产品的属性值对。 在当前优选的实施例中,(无监督)算法用于生成种子属性和值,然后可以支持受监督或半监督分类算法。
    • 17. 发明授权
    • DRM receiver with analog and digital separation filter and demodulation method
    • DRM接收机采用模拟和数字分离滤波器和解调方式
    • US08208365B2
    • 2012-06-26
    • US12079927
    • 2008-03-28
    • Yan LiuHuazhong Yang
    • Yan LiuHuazhong Yang
    • H04J11/00
    • H04L27/265H04H2201/12H04L27/0008
    • A Digital Radio Mondiale (DRM) receiver and demodulation method includes an analog and digital separation filter for filtering and separating a DRM-encoded signal and a non DRM-encoded signal from a composite RF signal received at the receiver. The DRM receiver includes a programmable downsampler and a programmable N-point Fast Fourier Transform (FFT) to recover and demodulate the OFDM symbols in a received DRM-encoded RF signal. The received signal is digitally sampled at a rate operably integer downsampled to achieve a number N samples in the useful portion of the OFDM symbol for input to an N-point FFT, where N equal to a power of two. The downsampling rate and size (N-points) of the FFT depend on the DRM encoding and transmission parameters, notably the robustness mode and spectrum occupancy. The structure and operation of the receiver in this manner simplifies the design and reduces the required filter order of the analog and digital separation filter.
    • 数字无线电广播(DRM)接收机和解调方法包括模拟和数字分离滤波器,用于从在接收机处接收的复合RF信号过滤和分离DRM编码信号和非DRM编码信号。 DRM接收机包括可编程下行采样器和可编程N点快速傅里叶变换(FFT),以在接收的DRM编码RF信号中恢复和解调OFDM符号。 接收到的信号以可操作的整数下采样的速率进行数字采样,以在OFDM符号的有用部分中实现N个采样,以输入到N点FFT,其中N等于2的幂。 FFT的下采样率和大小(N点)取决于DRM编码和传输参数,特别是鲁棒性模式和频谱占用。 以这种方式,接收机的结构和操作简化了设计,并减少了模拟和数字分离滤波器所需的滤波器顺序。