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    • 61. 发明授权
    • Echo analysis for identification of hybrid induced echo in a communication link
    • 用于识别通信链路中混合诱发回波的回波分析
    • US06961421B2
    • 2005-11-01
    • US10171754
    • 2002-06-17
    • Yimin ZhangBogdan Kosanovic
    • Yimin ZhangBogdan Kosanovic
    • H04B3/23H04M9/08
    • H04B3/23
    • Echo return loss is analyzed to determine if the near end connection of a communication link has hybrid induced echo. If the echo return loss is above a threshold value for a predetermined period, than no echo or very little echo is present. The lack of echo is treated as a four wire connection and the near end signal is processed accordingly. If the foreground and background filter update relationship indicates the presence of a hybrid or if the echo return loss drops below a second threshold, the condition of the near end signal is treated as a two wire hybrid induced echo. The analysis of the near end signal continues and treatment of the signal may switch between four wire and two wire any number of times during a communication link.
    • 分析回波损耗以确定通信链路的近端连接是否具有混合诱发回波。 如果回波损耗在预定时间段内高于阈值,则不存在回波或非常少的回波。 回波不足被视为四线连接,并且相应地处理近端信号。 如果前景和背景滤波器更新关系指示混合的存在或者如果回波损耗低于第二阈值,则将近端信号的条件视为双线混合诱发回波。 在通信链路期间,近端信号的分析继续并且信号的处理可以在四线和两线之间切换任何次数。
    • 62. 发明授权
    • Data transformation system, graphical mapping tool, and method for creating a schema map
    • 数据转换系统,图形绘图工具和创建模式图的方法
    • US09201558B1
    • 2015-12-01
    • US13288380
    • 2011-11-03
    • Paul C. DingmanWilliam G. BuntonKathryn E. Van DykenYimin ZhangLaurence T. Yogman
    • Paul C. DingmanWilliam G. BuntonKathryn E. Van DykenYimin ZhangLaurence T. Yogman
    • G05F7/00G06F17/30G06F3/048G06F15/16
    • G06F3/048G06F15/16G06F17/3056
    • Graphical mapping interface embodiments and method are provided for creating and displaying a schema map, which may be used by a data transformation system to perform a data transformation between at least one source schema and at least one target schema. According to one embodiment, the graphical mapping interface may comprise a source schema region for displaying a graphical representation of at least one source schema, a target schema region for displaying a graphical representation of at least one target schema, and a mapping region for displaying graphical representations of a plurality of links connecting the source nodes displayed in the source schema region to the target nodes displayed in the target schema region. The plurality of links may comprise at least one control link having at least one ECA rule associated therewith and at least one data link having at least one textual-based target field expression associated therewith.
    • 提供了用于创建和显示模式图的图形映射界面实施例和方法,模式映射可由数据变换系统用于在至少一个源模式和至少一个目标模式之间执行数据转换。 根据一个实施例,图形映射界面可以包括用于显示至少一个源模式的图形表示的源模式区域,用于显示至少一个目标模式的图形表示的目标模式区域,以及用于显示图形的映射区域 将在源模式区域中显示的源节点连接到在目标模式区域中显示的目标节点的多个链接的表示。 多个链路可以包括至少一个具有与其相关联的至少一个ECA规则的控制链路和至少一个具有与其相关联的至少一个基于文本的目标字段表达的数据链路。
    • 68. 发明授权
    • LED driving circuit and controlling method thereof
    • LED驱动电路及其控制方法
    • US07728530B2
    • 2010-06-01
    • US11595594
    • 2006-11-09
    • Ji WangYimin Zhang
    • Ji WangYimin Zhang
    • G05F1/00
    • H05B33/0815
    • The invention discloses an LED driving circuit and a controlling method thereof, comprising a power switch and a current sampling unit, as well as a voltage comparison unit for comparing the voltage obtained by the current sampling unit with a first reference voltage; an input voltage sampling unit for converting the sampled input voltage into a current signal; a timing unit for controlling the off-time of the power switch or presetting a fixed off-time; a logical unit for controlling the power switch by means of a power switch driving unit and for controlling the timing switch in the timing unit. The method for controlling the LED driving circuit comprises the step of modulating the off-time of the power switch with the input voltage or the step of presetting a fixed off-time. The invention can be used in LED light cluster driving with the power factor greater than 0.95.
    • 本发明公开了一种LED驱动电路及其控制方法,包括电源开关和电流采样单元,以及用于将由电流采样单元获得的电压与第一参考电压进行比较的电压比较单元; 输入电压采样单元,用于将采样的输入电压转换为电流信号; 定时单元,用于控制电源开关的关闭时间或预设固定的关闭时间; 逻辑单元,用于通过电源开关驱动单元控制电源开关并用于控制定时单元中的定时开关。 用于控制LED驱动电路的方法包括利用输入电压调制电源开关的关断时间或者预设固定的关闭时间的步骤。 本发明可用于功率因数大于0.95的LED光簇驱动。