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    X-ray radiation window with carbon nanotube frame
    12.
    发明授权
    X-ray radiation window with carbon nanotube frame 有权
    X射线辐射窗与碳纳米管框架

    公开(公告)号：US07756251B2

    公开(公告)日：2010-07-13

    申请号：US12239339

    申请日：2008-09-26

    申请人： Robert C. Davis ,  Richard R. Vanfleet ,  David N. Hutchison

    发明人： Robert C. Davis ,  Richard R. Vanfleet ,  David N. Hutchison

    IPC分类号： G21K1/00

    CPC分类号： H01J5/18 ,  H01J2235/18

    摘要： An x-ray transmissive window comprises a plurality of carbon nanotubes arranged into a patterned frame. At least one transmission passage is defined in the patterned frame, the transmission passage extending from a base of the patterned frame to a face of the patterned frame. A film is carried by the patterned frame, the film at least partially covering the transmission passage while allowing transmission of x-rays through the transmission passage.

    摘要翻译： x射线透射窗包括布置成图案化框架的多个碳纳米管。 在图案化框架中限定至少一个传输通道，传输通道从图案化框架的基部延伸到图案化框架的表面。 薄膜由图案化框架承载，薄膜至少部分地覆盖传输通道，同时允许透射透射通道的X射线。

    Ion gate sample gas inlet control for gas chromatograph analyzer
    14.
    发明授权
    Ion gate sample gas inlet control for gas chromatograph analyzer 失效
    气体色谱仪分析仪的离子门样品进气控制

    公开(公告)号：US4597299A

    公开(公告)日：1986-07-01

    申请号：US709233

    申请日：1985-03-06

    申请人： Donald N. Campbell ,  Kishore N. Vora ,  Robert C. Davis, Jr.

    发明人： Donald N. Campbell ,  Kishore N. Vora ,  Robert C. Davis, Jr.

    IPC分类号： G01N30/06 ,  G01N30/88 ,  G01N1/00

    CPC分类号： G01N30/06 ,  G01N30/88

    摘要： A gas tight cell receives an unmetered stream of sample gas. The cell is divided into a reaction chamber, as drift chamber and an ion collector chamber by transverse shutter grids normally carrying an ion repellent charge. The inlet of a chromatograph analytical column is connected to the outlet of the cell ion collector chamber. Inert gas admitted to the ion collector chamber is divided into a drift gas stream and into an oppositely directed carrier gas stream. The drift gas flows from the collector chamber through the drift chamber and out the reaction chamber. The carrier gas flows from the collector chamber through a deionizer into the chromatograph column. An electrostatic field urges sample gas ions from the reaction chamber toward the ion collection chamber. The ions are blocked from entering or exiting from the intervening drift chamber by the charge on the shutter grids. At selected times the repellent charges are removed from the shutter grids to allow a group of sample gas ions to traverse the drift chamber and enter the ion collection chamber. Such ions become entrained in the carrier gas stream and are transported thereby through the deionizer into the chromatograph column. The waveform of the current induced in the deionizer by sample gas ions passing therethrough provides information on the time, volume and shape of the gas sample admitted to the chromatograph column.

    摘要翻译： 气密电池接收未测量的样气气流。 电池通过横向快门网格分为反应室，漂移室和离子收集器室，通常携带离子斥力电荷。 色谱仪分析柱的入口连接到电池离子收集器的出口。 进入离子收集器室的惰性气体被分成漂移气流并进入相反方向的载气流中。 漂移气体从收集器室流过漂移室并流出反应室。 载气从收集器室通过去离子器流入色谱柱。 静电场将来自反应室的样品气体离子推向离子收集室。 通过快门网格上的电荷阻止离子进入或离开中间漂移室。 在选定的时间，将驱避电荷从快门栅格移除，以允许一组样品气体离子穿过漂移室并进入离子收集室。 这种离子被夹带在载气流中，并由此通过去离子器输送到色谱柱中。 通过样品气体离子在去离子器中感应的电流的波形提供了进入色谱柱的气体样品的时间，体积和形状的信息。

    Computerized video imaging system
    15.
    发明授权
    Computerized video imaging system 失效
    电脑视频成像系统

    公开(公告)号：US4583186A

    公开(公告)日：1986-04-15

    申请号：US593422

    申请日：1984-03-26

    申请人： Robert C. Davis ,  Steven E. Curd ,  Gregory L. Breedlove ,  Allan H. Colen ,  Louis P. Armstrong

    发明人： Robert C. Davis ,  Steven E. Curd ,  Gregory L. Breedlove ,  Allan H. Colen ,  Louis P. Armstrong

    IPC分类号： G03B27/73 ,  G03F3/00

    CPC分类号： G03B27/735

    摘要： A computerized video imaging system is provided which includes a target mount for supporting a target photographic transparency. A lamphouse is positioned to pass light through the transparency and includes light sources for a set of primary colors. An image sensor is positioned to receive light passing from the lamphouse through the transparency and generates video signals representing hue and intensity of the light. Image storage means are provided for storing color reference representations of the reference transparency. A color video monitor receives signals related to the reference representations and the target video signals. A computer interfaces with the light source and the image storage to calculate photographic color correction values for the target transparency.

    摘要翻译： 提供了一种计算机化的视频成像系统，其包括用于支撑目标照相透明度的目标支架。 灯塔被定位成将光通过透明物，并且包括一组原色的光源。 定位图像传感器以接收从灯箱通过透明度的光，并产生表示光的色调和强度的视频信号。 图像存储装置被提供用于存储参考透明度的颜色参考表示。 彩色视频监视器接收与参考表示和目标视频信号有关的信号。 计算机与光源和图像存储器接口以计算目标透明度的照相色彩校正值。

    Nonlinear equalizer for correcting intersymbol interference in a digital data transmission system
    16.
    发明授权
    Nonlinear equalizer for correcting intersymbol interference in a digital data transmission system 失效
    用于校正数字数据传输系统中符号间干扰的非线性均衡器

    公开(公告)号：US4468786A

    公开(公告)日：1984-08-28

    申请号：US420886

    申请日：1982-09-21

    申请人： Robert C. Davis

    发明人： Robert C. Davis

    IPC分类号： H04L25/03 ,  H04B3/14

    CPC分类号： H04L25/03146

    摘要： A non-linear equalizer corrects for intersymbol interference in a digital data transmission system by introducing baud rate samples into an N-stage tapped delay line and provision is made for storing a sequence of M prior decisions in a prior decision register. Both the samples from the tapped delay line and the contents of the prior decision register are coupled to a weighting matrix processor which is updated to permit adaptation to different channels conditions. When initially placed into operation, a training sequence is coupled to a reference register and differences between arrived-at decisions and the true symbols are employed to provide an error vector which is then used to update the weighting matrix in the processor. Decisions on the data estimates are hard-limited to form a set of M prior decisions which are placed into the prior decision register. The training sequence is employed over a suitable acquisition time so that the weights of the processor matrix will have stabilized at values suitable for the channel through which unknown digital data will be transmitted.Because the equalizer of the invention is non-linear, it can remove intersymbol interference without the severe noise enhancement problem of linear equalizers on some channels. Moreover, not only can it remove intersymbol interference from both precursors and postcursors, but it has the ability to modify previously made decisions upon the receipt of additional data from the channel.

    摘要翻译： 非线性均衡器通过将波特率采样引入N级抽头延迟线来校正数字数据传输系统中的符号间干扰，并提供用于在先前决策寄存器中存储M个先前决定的序列。 来自抽头延迟线的样本和先前决定寄存器的内容都被耦合到加权矩阵处理器，其被更新以允许适应不同的信道条件。 当初始放置在操作中时，将训练序列耦合到参考寄存器，并且使用到达决定与真实符号之间的差异来提供误差向量，然后使用该误差向量来更新处理器中的加权矩阵。 关于数据估计的决定很难被限制，以形成一组先前决定的M决定。 在合适的采集时间内采用训练序列，使得处理器矩阵的权重将稳定在适于通过其传送未知数字数据的信道的值。 因为本发明的均衡器是非线性的，所以它可以消除符号间干扰，而不会在一些信道上产生线性均衡器的严重的噪声增强问题。 此外，它不仅可以消除前体和后期两者之间的符号间干扰，而且可以在从通道接收到附加数据后修改先前做出的决定。

    Adaptive equalizer capable of linear and nonlinear weighting
    17.
    发明授权
    Adaptive equalizer capable of linear and nonlinear weighting 失效
    自适应均衡器能够进行线性和非线性加权

    公开(公告)号：US4435823A

    公开(公告)日：1984-03-06

    申请号：US221020

    申请日：1980-12-29

    申请人： Robert C. Davis ,  Gautam H. Thaker

    发明人： Robert C. Davis ,  Gautam H. Thaker

    IPC分类号： H04L25/03 ,  H04B3/18

    CPC分类号： H04L25/03038 ,  H04L25/03057

    摘要： Equalizers are commonly used in digital data signaling systems to reduce the effects of intersymbol interference on a signal received over a transmission channel. However, conventional equalizers are relatively slow due to their use of multipliers. Also, generally such equalizers are limited to providing a linear response to the received input signal samples. Accordingly, to provide a high-speed equalizer which is capable of both linear and nonlinear response, a transmission channel signal containing intersymbol interference is passed through a delay means which provides sequential Q-bit samples of said transmission channel signal. These Q-bit samples are then applied to a weighting means which includes a memory having stored equalizing weighting values which are accessed in accordance with the Q-bit samples to provide predetermined weighted output words in response to the Q-bit samples. These output words can be either linear or nonlinear with respect to the Q-bit samples. This technique serves to reduce intersymbol interference in the received signal thereby equalizing this signal. Also, since no multipliers are necessary, the equalizing operation can be carried out at a very high speed.

    摘要翻译： 均衡器通常用于数字数据信号系统，以减少符号间干扰对通过传输信道接收的信号的影响。 然而，由于使用乘法器，常规均衡器相对较慢。 此外，通常这种均衡器被限制为对接收到的输入信号样本提供线性响应。 因此，为了提供能够进行线性和非线性响应的高速均衡器，包含符号间干扰的传输信道信号通过提供所述传输信道信号的连续Q比特采样的延迟装置。 然后将这些Q位采样应用于加权装置，该加权装置包括具有存储的均衡加权值的存储器，其根据Q位采样进行访问，以响应于Q位采样来提供预定的加权输出字。 这些输出字可以是相对于Q位样本的线性或非线性。 该技术用于减少接收信号中的符号间干扰，从而均衡该信号。 此外，由于不需要乘法器，所以均衡操作可以以非常高的速度进行。