Graded glass/ceramic/glass structures for damage resistant ceramic dental and orthopedic prostheses
    81.
    发明申请
    Graded glass/ceramic/glass structures for damage resistant ceramic dental and orthopedic prostheses 有权
    分级玻璃/陶瓷/玻璃结构,用于耐磨陶瓷牙科和矫形假体

    公开(公告)号:US20080213727A1

    公开(公告)日:2008-09-04

    申请号:US11986290

    申请日:2007-11-20

    IPC分类号: A61C13/08 C03C14/00

    CPC分类号: A61C13/083 C03C14/00

    摘要: The present invention provides a functionally graded glass/ceramic/glass sandwich system especially useful in damage resistant, ceramic dental and orthopedic prosthesis. The functionally graded glass/substrate/glass composite structure comprises an outer (aesthetic) residual glass layer, a graded glass-ceramic layer, and a dense interior ceramic. The functionally graded glass/substrate/glass composite structure may further comprise a veneer on an exterior surface. The present invention also provides a method for preparing a functionally graded glass/ceramic/glass sandwich system. A powdered glass-ceramic composition or a glass tape is applied to the accessible surfaces of a dense alumina substrate to thereby substantially cover the substrate surfaces. The glass of the composition has a CTE similar to that of the substrate material. The glass-ceramic composition is infiltrated into the dense substrate by heating the assembly to temperatures 50-700° C. below the sintering temperature of the substrate.

    摘要翻译: 本发明提供了一种功能梯度的玻璃/陶瓷/玻璃夹层系统,特别适用于耐损伤陶瓷牙科和矫形假体。 功能梯度的玻璃/基底/玻璃复合结构包括外部(美观的)残余玻璃层,梯度玻璃陶瓷层和致密的内部陶瓷。 功能梯度的玻璃/基底/玻璃复合结构还可以在外表面上包括单板。 本发明还提供了制备功能梯度玻璃/陶瓷/玻璃夹心系统的方法。 将粉末状玻璃陶瓷组合物或玻璃带施加到致密氧化铝基板的可接近表面,从而基本上覆盖基板表面。 组合物的玻璃具有与基材材料相似的CTE。 通过将组件加热到低于衬底的烧结温度50-700℃的温度下,将玻璃 - 陶瓷组合物渗透到致密衬底中。

    Method and apparatus for tissue doppler imaging
    82.
    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

    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
    83.
    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
    84.
    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

    IPC分类号: C09K5/04

    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。

    Device and method for extrapolating specular energy of reverse time migration three dimensional angle gathers
    90.
    发明授权
    Device and method for extrapolating specular energy of reverse time migration three dimensional angle gathers 有权
    用于推测反向时间偏移三维角度聚集的镜面能量的装置和方法

    公开(公告)号:US09250341B2

    公开(公告)日:2016-02-02

    申请号:US13454547

    申请日:2012-04-24

    IPC分类号: G01V1/28 G01V1/36

    摘要: Computer instructions, computing device and method for processing seismic data under-sampled in an angle domain, the seismic data corresponding to a reverse time migration, three-dimensional, angle domain common image gather (ADCIG). The method includes receiving the seismic data; calculating, based on the seismic data, shot and receiver wave-fields with an RTM wave propagation engine; applying a wave-fields decomposition algorithm to obtain a propagation direction for the shot and receiver wave-fields; forming the ADCIG by applying an image condition to the shot and receiver wave-fields; determining that specular energies of the ADCIG are under-sampled around a reflection angle; during the step of forming the ADCIG, extrapolating the specular energies to a neighborhood of the reflection angle; and generating an image of a subsurface that is being surveyed based on the extrapolated specular energies.

    摘要翻译: 用于处理角度域欠采样的地震数据的计算机指令,计算装置和方法,对应于反向时间偏移,三维,角域共同图像采集(ADCIG)的地震数据。 该方法包括接收地震数据; 基于地震数据,利用RTM波传播引擎计算射击和接收波场; 应用波场分解算法获得射波和接收波场的传播方向; 通过对拍摄和接收器波场应用图像条件来形成ADCIG; 确定ADCIG的镜面能量在反射角附近被低采样; 在形成ADCIG的步骤中,将镜面能量外推到反射角附近; 并且基于外推的镜面能量产生正被测量的地下图像。