专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明授权

US07554718B2 Fast dynamic gain control in an optical fiber amplifier 有权
公开(公告)号：US07554718B2
公开(公告)日：2009-06-30
申请号：US11550258
申请日：2006-10-17
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
IPC分类号： H04B10/17 , H04B10/12
CPC分类号： H01S3/10007 , H01S3/06754 , H01S3/10015 , H01S3/302 , H04B10/2916 , H04B10/2942 , H04B10/296
摘要： The present invention provides methods and apparatuses for controlling a gain of an optical fiber amplifier. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump. The dynamic gain control technique is applicable to an Erbium-doped fiber/waveguide amplifier. Also, a dynamic gain control technique controls a backward-pumped Raman amplifier, in which the power variation is determined at one geographical location and the optical pumps are controlled at another geographical location.

52. 发明申请

US20090037919A1 Information-Theoretic View of the Scheduling Problem in Whole-Body Computer Aided Detection/Diagnosis (CAD) 有权
标题翻译：全身计算机辅助检测/诊断（CAD）中调度问题的信息理论观点
公开(公告)号：US20090037919A1
公开(公告)日：2009-02-05
申请号：US12181375
申请日：2008-07-29
申请人： Yiqiang Zhan , Xiang Zhou
发明人： Yiqiang Zhan , Xiang Zhou
IPC分类号： G06F9/46
CPC分类号： G06F19/345 , G06F19/00 , G16H50/20
摘要： A method for automatically scheduling tasks in whole-body computer aided detection/diagnosis (CAD), including: (a) receiving a plurality of tasks to be executed by a whole-body CAD system; (b) identifying a task to be executed, wherein the task to be executed has an expected information gain that is greater than that of each of the other tasks; (c) executing the task with the greatest expected information gain and removing the executed task from further analysis; and (d) repeating steps (b) and (c) for the remaining tasks.
摘要翻译：一种全身计算机辅助检测/诊断（CAD）中自动调度任务的方法，包括：（a）接收由全身CAD系统执行的多个任务; （b）识别要执行的任务，其中待执行的任务具有大于其他任务中的每一个的预期信息增益; （c）以最大的预期信息获取执行任务，并将执行的任务从进一步分析中移除; 和（d）对剩余的任务重复步骤（b）和（c）。

53. 发明申请

US20080247034A1 Fast Dynamic Gain Control in a Bidirectionally-Pumped Raman Fiber Amplifier 有权
标题翻译：双向泵浦拉曼光纤放大器中的快速动态增益控制
公开(公告)号：US20080247034A1
公开(公告)日：2008-10-09
申请号：US12137250
申请日：2008-06-11
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
IPC分类号： H01S3/30
CPC分类号： H01S3/302 , H01S3/06754 , H01S3/094011 , H01S3/094046 , H01S3/094096 , H01S3/10015 , H01S3/1301 , H01S2301/04 , H04B10/2916 , H04B10/2942 , H04B10/296
摘要： The present invention provides methods and apparatuses for controlling a gain of a bidirectionally-pumped Raman fiber amplifier having both forward optical pumps and backward optical pumps. The overall gain is controlled by adjusting the forward optical pumps, while the power levels of the backward optical pumps are essentially fixed. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one forward optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump.
摘要翻译：本发明提供了用于控制具有正向光泵和反向光泵的双向泵浦拉曼光纤放大器的增益的方法和装置。通过调整正向光泵来控制总体增益，而反向光泵的功率电平基本上是固定的。增益电路以开环配置工作，并且使用将至少一个波长区域的功率变化与至少一个正向光泵的泵浦功率调整相关联的预定功能。输入信号功率变化与所需泵浦功率调整之间的两个近似线性关系用于控制拉曼光纤放大器。每个近似线性关系包括至少一个线性系数，其涉及特定波长区域的功率变化和特定拉曼泵的功率调整。

54. 发明授权

US07389709B2 Reverse transfer system ball-screw, and electro-mechanical actuator employing same 有权
标题翻译：反向传递系统滚珠丝杠，以及使用该滚珠丝杠的机电致动器
公开(公告)号：US07389709B2
公开(公告)日：2008-06-24
申请号：US10880856
申请日：2004-06-30
申请人： Xiang Zhou
发明人： Xiang Zhou
IPC分类号： F16H1/18
CPC分类号： F16H25/2204 , F16H2025/2078 , H02K7/06 , Y10T74/18648 , Y10T74/18664 , Y10T74/19744
摘要： An electro-mechanical actuator (21) includes a reverse transfer system ball-screw (20). The actuator broadly includes a frame (22), a nut (43) mounted on the frame, at least one magnet (59) mounted on the nut, at least one coil (55) mounted on the frame, the coil being adapted to be selectively supplied with current to cause the nut to rotate within the frame, a rotary feedback device (80), and a screw (44) arranged within the nut for rotational and axial movement relative thereto. The screw and nut both have cooperative ball recesses (72, 74) that define a ball path in which a plurality of balls (73) are mounted. The ball recirculation path is provided in the screw. A rod (23) is connected to the screw for movement therewith. Relative rotation between the nut and screw will cause the screw and rod to move axially relative to the frame.
摘要翻译：电动机械致动器（21）包括反向传递系统滚珠丝杆（20）。致动器广泛地包括框架（22），安装在框架上的螺母（43），安装在螺母上的至少一个磁体（59），安装在框架上的至少一个线圈（55），线圈适于选择性地供应电流以使框架内的螺母旋转，旋转反馈装置（80）和布置在螺母内的用于相对于其旋转和轴向移动的螺钉（44）。螺钉和螺母都具有形成多个球（73）安装在其中的球道的协作滚珠凹槽（72,74）。球的再循环路径设置在螺钉中。杆（23）连接到螺杆以与其一起运动。螺母和螺钉之间的相对旋转将导致螺杆和杆相对于框架轴向移动。

55. 发明授权

US07342714B2 Multi-band hybrid SOA-raman amplifier for CWDM 有权
公开(公告)号：US07342714B2
公开(公告)日：2008-03-11
申请号：US11543591
申请日：2006-10-05
申请人： Patrick P. Iannone , Kenneth C. Reichmann , Xiang Zhou
发明人： Patrick P. Iannone , Kenneth C. Reichmann , Xiang Zhou
IPC分类号： H01S3/00
CPC分类号： H04B10/2916 , H01S3/005 , H01S3/0064 , H01S3/06754 , H01S3/094096 , H01S3/2375 , H01S3/2383 , H01S3/302 , H01S2301/04 , H04B10/2914 , H04B10/294 , H04B2210/258 , H04J14/0221
摘要： A multi-band hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses Raman laser pumps and semiconductor optical amplifiers in series to produce a relatively level gain across the frequency range of interest. Multiple Raman pumps are multiplexed before coupling into the fiber. The Raman amplified optical signal may be demultiplexed and separately amplified by the SOAs before re-multiplexing. Gain profiles of the Raman pumps and the SOAs are selected to compensate for gain tilt and to alleviate the power penalty due to cross-gain modulation in the SOAs. The disclosed hybrid amplifier is especially useful in coarse wavelength division multiplexing (CWDM) systems.

56. 发明申请

US20080025592A1 System and Method for Detection of Breast Masses and Calcifications Using the Tomosynthesis Projection and Reconstructed Images 有权
标题翻译：使用Tomosynthesis Projection和重建图像检测乳腺肿块和钙化的系统和方法
公开(公告)号：US20080025592A1
公开(公告)日：2008-01-31
申请号：US11767707
申请日：2007-06-25
申请人： Anna Jerebko , Arun Krishnan , Xiang Zhou
发明人： Anna Jerebko , Arun Krishnan , Xiang Zhou
IPC分类号： G06K9/00
CPC分类号： A61B6/466 , A61B6/03 , A61B6/502 , G06T7/0012 , G06T7/97 , G06T11/005 , G06T2207/10112 , G06T2207/10116 , G06T2207/30068 , G06T2211/436
摘要： A method of detecting breast masses and calcifications in digitized images, includes providing a plurality of 2-dimensional (2D) digital X-ray projectional breast images acquired from different viewing angles, extracting candidate lesions and 2D features from said 2D projectional images, computing spicularity characteristics of said candidate lesions, including location, periodicity, and amplitude, applying learning algorithms to said candidate lesions to predict a probability of malignancy of said lesion, receiving from said learning algorithm a probability map of detections for each breast image, said detections comprising associating pixels with a probability of being associated with a malignancy, creating a synthetic 2D slice for each X-ray image wherein malignant regions are indicated by ellipses on a non-malignant background, and constructing a synthetic 3-dimensional (3D) image volume from said 2D synthetic slices.
摘要翻译：一种在数字化图像中检测乳房肿块和钙化的方法，包括提供从不同视角获取的多个二维（2D）数字X射线投射乳房图像，从所述2D投影图像中提取候选病变和2D特征，计算孢子所述候选病变的特征，包括位置，周期和幅度，将学习算法应用于所述候选病变以预测所述病变的恶性的概率，从所述学习算法接收每个乳腺图像的检测的概率图，所述检测包括关联具有与恶性肿瘤相关联的概率的像素，为每个X射线图像创建合成2D切片，其中恶性区域由非恶性背景上的椭圆表示，以及从所述非恶性背景构建合成的三维（3D）图像体积 2D合成切片。

57. 发明申请

US20080007819A1 Fast Dynamic Gain Control In An Optical Fiber Amplifier 有权
标题翻译：光纤放大器中的快速动态增益控制
公开(公告)号：US20080007819A1
公开(公告)日：2008-01-10
申请号：US11858501
申请日：2007-09-20
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
IPC分类号： H01S3/091
CPC分类号： H01S3/302 , H01S3/06754 , H01S3/094096 , H01S3/10015 , H01S2301/04 , H04B10/2916 , H04B10/296
摘要： The present invention provides methods and apparatuses for controlling a gain of an optical fiber amplifier. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump. The dynamic gain control technique is applicable to an Erbium-doped fiber/waveguide amplifier. Also, a dynamic gain control technique controls a backward-pumped Raman amplifier, in which the power variation is determined at one geographical location and the optical pumps are controlled at another geographical location.
摘要翻译：本发明提供了用于控制光纤放大器的增益的方法和装置。增益电路以开环配置工作，并且使用将至少一个波长区域的功率变化与用于至少一个光泵的泵功率调整相关联的预定功能。输入信号功率变化与所需泵浦功率调整之间的两个近似线性关系用于控制拉曼光纤放大器。每个近似线性关系包括至少一个线性系数，其涉及特定波长区域的功率变化和特定拉曼泵的功率调整。动态增益控制技术适用于掺铒光纤/波导放大器。此外，动态增益控制技术控制反向泵浦拉曼放大器，其中在一个地理位置确定功率变化，并且将光泵控制在另一地理位置。

58. 发明授权

US07280269B2 Fast dynamic gain control in cascaded Raman fiber amplifiers 有权
公开(公告)号：US07280269B2
公开(公告)日：2007-10-09
申请号：US11424308
申请日：2006-06-15
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
IPC分类号： H01S4/00 , H04B10/12
CPC分类号： H01S3/06758 , H01S3/005 , H01S3/06754 , H01S3/06766 , H01S3/0677 , H01S3/094096 , H01S3/10007 , H01S3/10015 , H01S3/302 , H01S2301/04 , H01S2301/06 , H04B10/2916 , H04B10/2942 , H04B10/296
摘要： The present invention provides methods and apparatuses for controlling a gain of a bidirectionally-pumped Raman fiber amplifier having both forward optical pumps and backward optical pumps. The overall gain is controlled by adjusting the forward optical pumps, while the power levels of the backward optical pumps are essentially fixed. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one forward optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump.

59. 发明申请

US20070109624A1 Fast Dynamic Gain Control in Cascaded Raman Fiber Amplifiers 有权
公开(公告)号：US20070109624A1
公开(公告)日：2007-05-17
申请号：US11424308
申请日：2006-06-15
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
IPC分类号： H01S3/00
CPC分类号： H01S3/06758 , H01S3/005 , H01S3/06754 , H01S3/06766 , H01S3/0677 , H01S3/094096 , H01S3/10007 , H01S3/10015 , H01S3/302 , H01S2301/04 , H01S2301/06 , H04B10/2916 , H04B10/2942 , H04B10/296
摘要： The present invention provides methods and apparatuses for controlling a gain of a bidirectionally-pumped Raman fiber amplifier having both forward optical pumps and backward optical pumps. The overall gain is controlled by adjusting the forward optical pumps, while the power levels of the backward optical pumps are essentially fixed. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one forward optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump.

60. 发明申请

US20070058242A1 Fast Dynamic Gain Control in an Optical Fiber Amplifier 有权
标题翻译：光纤放大器中的快速动态增益控制
公开(公告)号：US20070058242A1
公开(公告)日：2007-03-15
申请号：US11550258
申请日：2006-10-17
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
IPC分类号： H01S3/00 , H04B10/12
CPC分类号： H01S3/10007 , H01S3/06754 , H01S3/10015 , H01S3/302 , H04B10/2916 , H04B10/2942 , H04B10/296
摘要： The present invention provides methods and apparatuses for controlling a gain of an optical fiber amplifier. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump. The dynamic gain control technique is applicable to an Erbium-doped fiber/waveguide amplifier. Also, a dynamic gain control technique controls a backward-pumped Raman amplifier, in which the power variation is determined at one geographical location and the optical pumps are controlled at another geographical location.
摘要翻译：本发明提供了用于控制光纤放大器的增益的方法和装置。增益电路以开环配置工作，并且使用将至少一个波长区域的功率变化与用于至少一个光泵的泵功率调整相关联的预定功能。输入信号功率变化与所需泵浦功率调整之间的两个近似线性关系用于控制拉曼光纤放大器。每个近似线性关系包括至少一个线性系数，其涉及特定波长区域的功率变化和特定拉曼泵的功率调整。动态增益控制技术适用于掺铒光纤/波导放大器。此外，动态增益控制技术控制反向泵浦拉曼放大器，其中在一个地理位置确定功率变化，并且将光泵控制在另一地理位置。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式