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    • 15. 发明授权
    • White LED device having LED chips directly driven by alternating current
    • 白色LED器件,具有直接由交流电驱动的LED芯片
    • US09185761B2
    • 2015-11-10
    • US13883832
    • 2011-03-01
    • Hongjie ZhangMing ZhangChengyu LiKun ZhaoDongming LiLi Zhang
    • Hongjie ZhangMing ZhangChengyu LiKun ZhaoDongming LiLi Zhang
    • H01J1/62H01L33/00H05B33/08H01L33/50
    • H05B33/0845H01L27/15H01L33/502H05B33/0809H05B33/0821
    • An Alternate Current (AC) white Light-Emitting Diode (LED) device is provided, which belongs to the technical field of white LED manufacturing. The problem to be solved by the present invention is to low-costly overcome a series of deficiencies such as the stroboflash of an AC driven LED, and the heat dissipation difficulty caused by an integrated packaging of multiple LEDs. A white LED unit includes an LED chip and a light emitting material that can emit light when being excited by the LED chip. The luminous lifetime of the light emitting material is 1-100 ms. The LED chip only comprises one PN junction. The light emitted by the LED chip is mixed with the light emitted by the light emitting material to form white light. The white LED unit is driven by AC with a frequency not more than 100 Hz. The white LED device of prevent invention uses the single PN junction chip, rather than the prior integrated packaged AC multi-LED chip.
    • 提供交流(AC)白光发光二极管(LED)装置,属于白光LED制造技术领域。 本发明要解决的问题是低成本地克服了诸如AC驱动LED的闪光灯等一系列缺陷以及由多个LED的集成封装引起的散热困难。 白色LED单元包括LED芯片和当被LED芯片激发时可以发光的发光材料。 发光材料的发光寿命为1-100ms。 LED芯片仅包括一个PN结。 由LED芯片发出的光与由发光材料发射的光混合,形成白光。 白色LED单元由AC不超过100 Hz的频率驱动。 防止发明的白色LED装置使用单个PN结芯片,而不是现有的集成封装的交流多LED芯片。
    • 16. 发明授权
    • X-ray source grating stepping imaging system and image method
    • X射线源光栅步进成像系统和图像方法
    • US09134259B2
    • 2015-09-15
    • US13641542
    • 2010-12-27
    • Zhifeng HuangZhiqiang ChenLi ZhangYuanjing LiYuxiang XingZiran ZhaoYongshun XiaoLiang LiFei Ding
    • Zhifeng HuangZhiqiang ChenLi ZhangYuanjing LiYuxiang XingZiran ZhaoYongshun XiaoLiang LiFei Ding
    • G01N23/00G01N23/04A61B6/00
    • G01N23/046A61B6/4291A61B6/484G01N2223/419
    • An X-ray imaging system comprising: an X-ray source, a source grating, a fixed grating module and an X-ray detector, which are successively positioned in the propagation direction of X-ray; an object to be detected is positioned between the source grating and the fixed gating module; said source grating can perform stepping movement in a direction perpendicular to the optical path and grating stripes; wherein the system further comprises a computer workstation for controlling said X-ray source, source grating and X-ray detector so as to perform the following processes: the source grating performs stepping movement in at least one period thereof; at each stepping step, the X-ray source emits X-ray to the object to be detected, and the detector receives the X-ray at the same time; wherein after at least one period of stepping and data acquisition, the light intensity of X-ray at each pixel point on the detector is represented as a light intensity curve; the light intensity curve at each pixel point on the detector is compared with a light intensity curve in the absence of the object to be detected, a pixel value of each pixel point is calculated from change in said light intensity curve; an image of the detected object is reconstructed according to the calculated pixel value.
    • 一种X射线成像系统,包括:X射线源,源光栅,固定光栅模块和X射线检测器,其依次位于X射线的传播方向上; 要检测的物体位于源光栅和固定门控模块之间; 所述源光栅可以在垂直于光路和光栅条纹的方向上执行步进运动; 其中所述系统还包括用于控制所述X射线源,源光栅和X射线检测器的计算机工作站,以便执行以下处理:源光栅在其至少一个周期中执行步进运动; 在每个步进步骤中,X射线源向被检测物体发射X射线,并且检测器同时接收X射线; 其中在步进和数据采集的至少一个周期之后,将检测器上每个像素点处的X射线的光强度表示为光强度曲线; 将检测器上的每个像素点处的光强度曲线与不存在待检测对象的光强度曲线进行比较,根据所述光强度曲线的变化计算每个像素点的像素值; 根据计算出的像素值重建被检测物体的图像。
    • 20. 发明授权
    • Document processing method and system
    • 文件处理方法和系统
    • US09043356B2
    • 2015-05-26
    • US13608309
    • 2012-09-10
    • Sheng Hua BaoJie CuiHui SuZhong SuLi Zhang
    • Sheng Hua BaoJie CuiHui SuZhong SuLi Zhang
    • G06F7/00G06F17/30
    • G06F17/30716G06F17/30011
    • A method and system for expanding a document set as a search data source in the field of business related search. The present invention provides a method of expanding a seed document in a seed document set. The method includes identifying one or more entity words of the seed document; identifying one or more topic words identifying one or more topic words related to a based entity word in the seed document where the entity word is located; forming an entity word-topic word pair from each identified topic word and the entity word on the basis of which each topic word is identified; and obtaining one or more expanded documents by taking the entity word and topic word in each entity word-topic word pair as key words for web searching at the same time. A system for executing the above method is also provided.
    • 一种在业务相关搜索领域中扩展作为搜索数据源的文档集的方法和系统。 本发明提供一种在种子文档集中扩展种子文档的方法。 该方法包括识别种子文档的一个或多个实体单词; 识别识别与所述实体单词所在的种子文档中的基于实体词相关的一个或多个主题词的一个或多个主题词; 从每个识别的主题词和实体单词形成实体单词对,并根据该单词识别每个主题词; 并通过将每个实体词主题词对中的实体单词和主题词作为用于网页搜索的关键词同时获得一个或多个扩展文档。 还提供了用于执行上述方法的系统。