会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Process and device for magnetic resonance examinations
    • 磁共振检查的过程和装置
    • US5952829A
    • 1999-09-14
    • US954845
    • 1997-10-21
    • Jorg MelcherRolf LammeringEric M. Flint
    • Jorg MelcherRolf LammeringEric M. Flint
    • G01R33/385A61B5/055G01R33/28G01V3/175
    • G01R33/28G01R33/3854
    • The invention relates to a process for magnetic resonance examinations, in particular nuclear spin tomography, whereby a static magnetic field is produced in an examination zone and at least one gradient magnetic field is superposed, whereby unwanted alternating electromagnetic forces are produced, whereby by means of magnetostriction, forces opposing the electromagnetic forces are produced by the same gradient magnetic field and these forces act longitudinally and/or radially and/or around the circumference of the examination zone. Furthermore, the invention relates to a device for magnetic resonance examinations, in particular nuclear spin tomography, with a first generating unit for a static magnetic field, a second generating unit (20) for at least one gradient magnetic field and a support unit (10) for the second generating unit (20), whereby a magnetostrictive material system (11, 12) is provided on the support unit (10).
    • 本发明涉及一种用于磁共振检查,特别是核自旋断层扫描的方法,由此在检查区域中产生静态磁场,并且至少一个梯度磁场被叠加,由此产生不需要的交变电磁力,由此通过 磁致伸缩,与电磁力相反的力由相同的梯度磁场产生,并且这些力纵向和/或径向和/或围绕检查区的圆周作用。 此外,本发明涉及一种用于磁共振检查,特别是核自旋断层摄影的装置,具有用于静磁场的第一产生单元,用于至少一个梯度磁场的第二生成单元(20)和支撑单元(10 ),由此在支撑单元(10)上设置有磁致伸缩材料系统(11,12)。
    • 3. 发明授权
    • Method and facility for the identification of dynamic characteristic
quantities
    • 用于识别动态特征量的方法和设施
    • US5434773A
    • 1995-07-18
    • US9776
    • 1993-01-28
    • Jorg Melcher
    • Jorg Melcher
    • G05B21/02G05B23/02H03H17/02G11C11/00
    • H03H17/02G05B17/02G05B21/02G05B23/024
    • A method for identification of dynamic characteristic quantities in a linear system having an electronic model, the electronic model having a complex signal flow with a complex residual a.sub.i =a'.sub.i +ja".sub.i, and a complex inherent value b.sub.i =b'.sub.i +jb".sub.i of the `i`th degree freedom describing model parameters a'.sub.i,a".sub.i,b.sub.i ', and b".sub.i for each degree of the system. The various signal flows are arranged parallel to one another for the various degrees of freedom, and are excited by the same signal `f` as the linear system. A difference e(n) determined at the time `n` between a model response `y` and a similar system response `d`, the system response having been time delayed by one unit of time, is used for adapting the model parameters for the system for the point in time (n+1), using variable step sized coefficients .alpha.'.sub.i (n),.alpha.".sub.i (n),.beta.'.sub.i (n),&.beta.".sub.i (n) for determining the accuracy of the adaptation to the system.
    • 一种用于在具有电子模型的线性系统中识别动态特征量的方法,所述电子模型具有具有复残差ai = a'i + ja'ii的复信号流,以及复数固有值bi = b'i 对于系统的每个程度,描述模型参数a'i,a''i,bi'和b''i的'第i度自由度的+ jb'​​'。 各种信号流为各种自由度彼此平行配置,并被与线性系统相同的信号'f'激励。 在模型响应y和类似系统响应d之间的时间'n'处确定的差异e(n)被用于将系统响应时间延迟一个单位时间,以适应 使用可变步长大小的系数α'i(n),α“i(n),β'i(n),&beta”i(n)来确定系统的时间点(n + 1) 适应系统的准确性。