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316 条记录 (耗时 0.136 秒)

    Method and apparatus for tissue doppler imaging
    61.
    发明申请
    Method and apparatus for tissue doppler imaging 有权
    组织多普勒成像的方法和装置

    公开(公告)号：US20080161691A1

    公开(公告)日：2008-07-03

    申请号：US11646841

    申请日：2006-12-27

    申请人： Yu Zhang ,  Xin Li

    发明人： Yu Zhang ,  Xin Li

    IPC分类号： A61B8/00

    CPC分类号： G01S15/8981 ,  A61B8/06 ,  A61B8/0883 ,  A61B8/488 ,  G01S7/52042 ,  G01S15/8988

    摘要： A method for Tissue Doppler Imaging is provided. The method for Tissue, Doppler Imaging comprises steps of: a) transmitting ultrasound signals to a target area including the tissue to be imaged, and receiving the echo signals returned from the target area; b) performing Doppler estimation on Doppler signals extracted from the echo signals, to acquire Doppler parameters of stationary tissue or nonstationary tissue or blood flow within the target area, wherein the Doppler parameters comprise at least velocity and power; c) processing the acquired power of the Doppler parameters to obtain the power related to the nonstationary tissue within the target area, so as to display the tissue motion.

    摘要翻译： 提供了一种组织多普勒成像方法。 用于组织，多普勒成像的方法包括以下步骤：a）将超声信号发送到包括要成像的组织的目标区域，以及接收从目标区域返回的回波信号; b）对从所述回波信号提取的多普勒信号执行多普勒估计，以获取所述目标区域内的静止组织或非平稳组织或血流的多普勒参数，其中所述多普勒参数至少包括速度和功率; c）处理获取的多普勒参数的功率以获得与目标区域内的非平稳组织相关的功率，以便显示组织运动。

    Method and apparatus for extracting an envelope curve of a spectrogram
    62.
    发明申请
    Method and apparatus for extracting an envelope curve of a spectrogram 有权
    用于提取谱图的包络线的方法和装置

    公开(公告)号：US20070016045A1

    公开(公告)日：2007-01-18

    申请号：US11316048

    申请日：2005-12-21

    申请人： Yu Zhang

    发明人： Yu Zhang

    IPC分类号： A61B8/00

    CPC分类号： A61B8/06 ,  A61B8/488

    摘要： A method and apparatus for extracting an envelope curve of a spectrogram, for use in measurement of blood flow velocity by using spectral Doppler techniques, the method comprising steps of: processing RF ultrasound echo signals to obtain Doppler signals; performing spectral analysis on the Doppler signals, to obtain a corresponding power spectrum P(f); estimating a forward maximum frequency fmax+ and a backward maximum frequency fmax− for the Doppler signals at a predetermined moment, according to the power spectrum P(f) of the Doppler signals at the predetermined moment; determining a noise frequency range according to the two maximum frequencies, so as to estimate an average noise power E; and correcting the forward maximum frequency and the backward maximum frequency by using the average noise power E. With the method of the invention, influence from the SNR and bandwidth on the envelope curve may be reduced, so as to be useful for accurate computation of blood flow parameters.

    摘要翻译： 一种用于提取频谱图的包络线的方法和装置，用于通过使用频谱多普勒技术测量血流速度，所述方法包括以下步骤：处理RF超声回波信号以获得多普勒信号; 对多普勒信号进行光谱分析，得到相应的功率谱P（f）; 根据多普勒的功率谱P（f），在预定时刻估计用于多普勒信号的前向最大频率f max + 和后向最大频率f max = 信号在预定时刻; 根据两个最大频率确定噪声频率范围，以估计平均噪声功率E; 并且通过使用平均噪声功率E来校正正向最大频率和后向最大频率。利用本发明的方法，可以减小来自信噪比和带宽对包络线的影响，从而有助于精确计算血液 流量参数。

    Refrigerant mixtures used in the lower temperature stage of two-stage cascade refrigeration systems
    63.
    发明申请
    Refrigerant mixtures used in the lower temperature stage of two-stage cascade refrigeration systems 审中-公开
    在两级级联制冷系统的较低温度阶段使用的制冷剂混合物

    公开(公告)号：US20070007487A1

    公开(公告)日：2007-01-11

    申请号：US11482065

    申请日：2006-07-07

    申请人： Jianfeng Wu ,  Maoqiong Gong ,  Yu Zhang

    发明人： Jianfeng Wu ,  Maoqiong Gong ,  Yu Zhang

    IPC分类号： C09K5/04

    CPC分类号： C09K5/045 ,  C09K2205/12 ,  C09K2205/128

    摘要： Refrigerant mixtures used in the lower temperature stage of two-stage cascade refrigeration systems and obtained by physical mixing of ethane, hexafluoroethane, or/and trifluoromethane. One of the refrigerant mixtures comprises ethane and hexafluoroethane. Another refrigerant mixture comprises ethane and trifluoromethane. Yet another one of the refrigerant mixtures comprises ethane, hexafluoroethane, and trifluoromethane.

    摘要翻译： 通过两级级联制冷系统的较低温度阶段使用的制冷剂混合物，通过物理混合乙烷，六氟乙烷或/和三氟甲烷获得。 其中一种制冷剂混合物包括乙烷和六氟乙烷。 另一种制冷剂混合物包括乙烷和三氟甲烷。 另一种制冷剂混合物包括乙烷，六氟乙烷和三氟甲烷。

    REPORTING APERIODIC CSI VIA PUCCH
    68.
    发明申请
    REPORTING APERIODIC CSI VIA PUCCH 审中-公开

    公开(公告)号：US20200178240A1

    公开(公告)日：2020-06-04

    申请号：US16615534

    申请日：2018-06-15

    申请人： Yu ZHANG ,  Chao WEI ,  Liangming WU ,  Wanshi CHEN ,  QUALCOMM Incorporated

    发明人： Yu Zhang ,  Chao Wei ,  Liangming Wu ,  Wanshi Chen

    IPC分类号： H04W72/04 ,  H04L5/00

    摘要： Reporting aperiodic channel state information (A-CSI) via a physical uplink control channel (PUCCH) is disclosed. A UE receives a configuration to report aperiodic channel state information (A-CSI) using physical uplink control channel (PUCCH). The UE can report lightweight A-CSI via short/long PUCCH or may report heavy A-CSI via short/long PUCCH. The UE receives a trigger signal for PUCCH-based A-CSI reporting either by a dedicated downlink grant or by a group common DCI. When triggered via a DCI-based trigger, the PUCCH resource can be either a resource used for HARQ-ACK feedback, e.g., short PUCCH; or a semi-static configured PUCCH resource, e.g., either short PUCCH or long PUCCH. When triggered via a group common DCI-based trigger, the PUCCH resource can be either semi-statically configured, or dynamically indicated.

    COLLISION HANDLING MECHANISMS FOR DYNAMIC TDD SYSTEMS
    69.
    发明申请
    COLLISION HANDLING MECHANISMS FOR DYNAMIC TDD SYSTEMS 审中-公开

    公开(公告)号：US20200169364A1

    公开(公告)日：2020-05-28

    申请号：US16608328

    申请日：2018-06-08

    申请人： Chenxi HAO ,  Yu ZHANG ,  Liangming WU ,  Chao WEI ,  Wanshi CHEN ,  Qualcomm Incorporated

    发明人： Chenxi Hao ,  Yu Zhang ,  Liangming Wu ,  Chao Wei ,  Wanshi Chen

    IPC分类号： H04L5/00 ,  H04B7/06 ,  H04W72/14 ,  H04W24/10 ,  H04W72/04 ,  H04L5/14

    摘要： Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for communicating an uplink grant and a channel state information reference signal (CSI-RS) trigger. A wireless device may identify e a pending collision for a slot of a carrier between a CSI-RS and uplink data. The wireless device may determine a communication configuration for the CSI-RS and the uplink data such that no collision occurs. The determined communication configuration for the CSI-RS may include delaying one of the colliding signals, transmitting only one of the colliding signals and suppressing the other, or reconfiguring the slot such that both signals can be transmitted successfully. Additionally, the UE and the base station may determine a CSI reporting configuration based on the determined communication configuration.

    SIGNALING DESIGN FOR MULTIPLE APERIODIC CSI FEEDBACK
    70.
    发明申请
    SIGNALING DESIGN FOR MULTIPLE APERIODIC CSI FEEDBACK 审中-公开

    公开(公告)号：US20200092070A1

    公开(公告)日：2020-03-19

    申请号：US16615562

    申请日：2018-06-12

    申请人： Liangming WU ,  Wanshi CHEN ,  Yu ZHANG ,  Chao WEI ,  Chenxi HAO ,  QUALCOMM Incorporated

    发明人： Liangming Wu ,  Wanshi Chen ,  Yu Zhang ,  Chao Wei ,  Chenxi Hao

    IPC分类号： H04L5/00

    摘要： A signaling design for multiple aperiodic channel state information (M-A-CSI) feedback is disclosed. In new radio (NR) networks, there may be scenarios where M-A-CSI are triggered and reported simultaneously. Timing issues may arise because of the different delay periods for difference CSI processes and reporting. In a first aspect, a general set of delay times for the M-A-CSI maybe signaled to the user equipment (UE) from which a candidate set is selected by the UE based on various CSI related settings. An indication from the base station may then be used to select the delay from the candidate set. In a second aspect, a delay period may be selected from the set of delays associated with and corresponding to the M-A-CSI.