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    • 1. 发明申请
    • APPLICATION OF PHASE-LOCKED LOOP (PLL) IN OSCILLATION MONITORING FOR INTERCONNECTED POWER SYSTEMS
    • 相位锁定环路(PLL)在互连电源系统的振荡监测中的应用
    • US20130082753A1
    • 2013-04-04
    • US13280458
    • 2011-10-25
    • Kai SunQiang Zhou
    • Kai SunQiang Zhou
    • H03L7/08
    • H03L7/08
    • The present invention relates to a method for accurately detecting oscillations and improving stability of power systems. The method includes the steps of providing a phase-locked loop having a phase detector, a loop filter, and a number-controlled oscillator. The method further includes the steps of extracting an input signal from the power system, using the phase-locked loop to track the frequency and phase of a targeted mode in the input signal, and creating a locally generated reference signal to fit the input signal and to allow the input signal's modal information to be obtained. The method further includes the step of performing mode shape analysis utilizing the reference phase signals constructed from the tracked frequencies.
    • 本发明涉及一种精确检测振荡和提高电力系统稳定性的方法。 该方法包括提供具有相位检测器,环路滤波器和数控振荡器的锁相环的步骤。 该方法还包括以下步骤:使用锁相环来从电力系统提取输入信号,以跟踪输入信号中的目标模式的频率和相位,以及创建本地生成的参考信号以拟合输入信号和 以允许获得输入信号的模态信息。 该方法还包括利用由跟踪频率构成的参考相位信号来执行模式形状分析的步骤。
    • 2. 发明授权
    • Application of phase-locked loop (PLL) in oscillation monitoring for interconnected power systems
    • 锁相环(PLL)在互联电力系统振荡监测中的应用
    • US08471610B2
    • 2013-06-25
    • US13280458
    • 2011-10-25
    • Kai SunQiang Zhou
    • Kai SunQiang Zhou
    • H03L7/06
    • H03L7/08
    • The present invention relates to a method for accurately detecting oscillations and improving stability of power systems. The method includes the steps of providing a phase-locked loop having a phase detector, a loop filter, and a number-controlled oscillator. The method further includes the steps of extracting an input signal from the power system, using the phase-locked loop to track the frequency and phase of a targeted mode in the input signal, and creating a locally generated reference signal to fit the input signal and to allow the input signal's modal information to be obtained. The method further includes the step of performing mode shape analysis utilizing the reference phase signals constructed from the tracked frequencies.
    • 本发明涉及一种精确检测振荡和提高电力系统稳定性的方法。 该方法包括提供具有相位检测器,环路滤波器和数控振荡器的锁相环的步骤。 该方法还包括以下步骤:使用锁相环来从电力系统提取输入信号,以跟踪输入信号中的目标模式的频率和相位,以及创建本地生成的参考信号以拟合输入信号和 以允许获得输入信号的模态信息。 该方法还包括利用由跟踪频率构成的参考相位信号来执行模式形状分析的步骤。
    • 3. 发明授权
    • High temperature packers
    • 高温包装机
    • US09518438B2
    • 2016-12-13
    • US13962045
    • 2013-08-08
    • Kai SunThomas Gary Corbett
    • Kai SunThomas Gary Corbett
    • E21B33/12E21B33/128
    • E21B33/12E21B33/128
    • Self-initialized packers for use in high temperature steam injection applications in wellbores are provided. The packers include an actuating mechanism for setting a packing element for sealing within an openhole or cased hole. The actuating mechanism includes an actuator sleeve that includes an actuating element constructed from a shape memory alloy that has a transformation temperature range greater than a geothermal temperature of the wellbore, and is actuated upon heating from steam injection. Systems and methods of using the packers are also provided.
    • 提供了用于井筒中高温蒸汽注入应用的自初始化包装机。 封隔器包括用于将密封件设置在裸露孔或套管孔内的致动机构。 致动机构包括致动器套筒,该致动器套筒包括由形状记忆合金构成的致动元件,该形状记忆合金的转变温度范围大于井筒的地热温度,并且在从蒸汽喷射加热时被致动。 还提供了使用封隔器的系统和方法。
    • 5. 发明申请
    • METHOD AND SYSTEM FOR DISTRIBUTING KEY OF MEDIA STREAM
    • 用于分发媒体关键的方法和系统
    • US20090279705A1
    • 2009-11-12
    • US12508025
    • 2009-07-23
    • Kai SunTao KongJianghai GaoJing Li
    • Kai SunTao KongJianghai GaoJing Li
    • H04L9/08H04L9/06
    • H04L9/083H04L63/06
    • A method and a system for distributing key of media stream are provided. The method comprises: determining, by a security management server, whether a domain to which the calling terminal belongs and a domain to which a called terminal belongs subscribe a key distribution protocol; generating a key based on encryption capability information obtained in a calling process, and distributing the generated key to the calling terminal and the called terminal, if the protocol has been subscribed; generating a key based on encryption capability information obtained in a calling process, and distributing the generated key to the terminal at the same side as the security management server, if the protocol has not been subscribed. By applying the disclosure, the key is generated by the security management server, so that complexity may be reduced for media stream key negotiation to facilitate promotion of media stream encryption service.
    • 提供了一种用于分发媒体流密钥的方法和系统。 该方法包括:由安全管理服务器确定主叫终端所属的域和被叫终端所属的域是否签发密钥分发协议; 基于在呼叫处理中获得的加密能力信息生成密钥,并且如果协议已被订阅,则将生成的密钥分发给主叫终端和被叫终端; 基于在呼叫处理中获得的加密能力信息生成密钥,并且如果协议没有被订阅,则将生成的密钥分发到与安全管理服务器相同的一侧的终端。 通过应用本公开,密钥由安全管理服务器生成,从而可以减少媒体流密钥协商的复杂性,以促进媒体流加密服务的推广。
    • 6. 发明授权
    • Adaptive step-size motion estimation based on statistical sum of
absolute differences
    • 基于绝对差异统计和的自适应步长运动估计
    • US6014181A
    • 2000-01-11
    • US949303
    • 1997-10-13
    • Kai Sun
    • Kai Sun
    • H04N7/32G06T7/20H04N7/26H04N7/50
    • G06T7/2013H04N19/51H04N19/56H04N19/57
    • A novel motion estimation algorithm, AMESSAD (adaptive motion estimation based on statistical sum of absolute difference) is provided. The algorithm adaptively determines motion search step size based on statistical distribution of SAD (sum of absolute difference). That is, search step sizes to estimate motion in one portion of a frame are calculated using SAD values from neighboring portions of the frame. The efficient search procedure improves the implementation of motion compensation and transform based hybrid video coders, such as the H.26P and MPEG-X standard video compression. Compared with fixed step-size motion estimation, the adaptive algorithm improves motion estimation and hence overall video encoding speed. In addition, improved visual quality can be achieved in many cases because the algorithm differentiates regions with motion activity and allocates more motion estimation resources to local areas or local frames with higher motion content.
    • 提供了一种新颖的运动估计算法,AMESSAD(基于绝对差的统计和的自适应运动估计)。 该算法基于SAD的统计分布(绝对差的和)自适应地确定运动搜索步长。 也就是说,使用来自帧的相邻部分的SAD值来计算用于估计帧的一部分中的运动的搜索步长。 高效的搜索过程改进了运动补偿和基于变换的混合视频编码器的实现,如H.26P和MPEG-X标准视频压缩。 与固定步长运动估计相比,自适应算法改善了运动估计,从而改善了整体视频编码速度。 此外,在许多情况下可以实现改进的视觉质量,因为该算法将区域与运动活动区分开,并且将更多的运动估计资源分配给具有较高运动内容的局部区域或局部帧。
    • 8. 发明申请
    • Apparatus and Method for Modeling Well Designs and Well Performance
    • 用于建模井设计和井表演的装置和方法
    • US20100299124A1
    • 2010-11-25
    • US12470869
    • 2009-05-22
    • Kai SunJesse ConstantineCraig Coull
    • Kai SunJesse ConstantineCraig Coull
    • G06G7/48G06F17/10
    • E21B43/00
    • In one aspect, a method of estimating fluid flow contribution from each producing zone of multi-zone production well is provided, which method may include: defining a wellhead pressure; determining a first inflow performance relation (IPR1) between pressure and fluid inflow rate at a first producing zone and a second inflow performance relation (IPR2) between pressure and fluid inflow rate at a second producing zone; determining a combined performance relation (IPRc) between pressure and fluid inflow rate at a commingle point; defining an initial fluid flow rate into the well from the first zone and an initial fluid flow rate from the second zone; generating a first fluid lift performance relation (TPR1) between pressure and total fluid flow corresponding to the commingle point using the initial fluid flow rates from the first and second production zones and at least one fluid property; and determining contribution of the fluid from the first zone and the second zone at the commingle point using IPRc and TPR1.
    • 在一方面,提供了一种估计来自多区域生产井的每个生产区的流体流量贡献的方法,该方法可以包括:定义井口压力; 确定第一生产区的压力和流体流入速率之间的第一流入性能关系(IPR1)和在第二产区的压力和流体流入速率之间的第二流入性能关系(IPR2); 确定在一个交点处的压力和流体流入速率之间的组合性能关系(IPRc); 从所述第一区域界定初始流体流入所述井并且从所述第二区限定初始流体流速; 使用来自第一和第二生产区域的初始流体流速和至少一种流体性质,产生对应于共同点的压力和总流体流量之间的第一流体提升性能关系(TPR1); 并使用IPRc和TPR1确定来自第一区域和第二区域的流体在共同点处的贡献。
    • 9. 发明授权
    • Transmission of video
    • 视频传输
    • US07760801B2
    • 2010-07-20
    • US10534468
    • 2003-11-18
    • Mohammed GhanbariKai Sun
    • Mohammed GhanbariKai Sun
    • H04N11/04H04B1/66
    • H04N21/44016H04L29/06027H04L47/10H04L47/2416H04L47/365H04L65/602H04L65/80H04N21/23406H04N21/23424H04N21/234345H04N21/6338
    • Compressed recorded video is to be transmitted over a variable bit-rate link, using bandwidth reservation. In order to determining the transmission rate that is to be used (and reserved) at any given time, in such a way as to make the two match so as to minimize wasted bandwidth, the data stream is split into chunks chosen such that the average bit rate for the chunk as a whole is no less that the average bit rate for any shorter chunk starting at the same point. The chunk can then be transmitted using this average rate without any buffering problems. Preferably one chooses chunks so that the average bit rate for the chunk is no less than that for any shorter or longer chunk starting at the same point. This has the benefit that a request for bandwidth never has to ask for an allocation that is higher than that specified in any previous such request. In systems that switch between streams of different degrees compression. the switching points can with advantage be chosen to coincide with the inter-chunk boundaries.
    • 压缩记录视频将通过可变比特率链路传输,使用带宽预留。 为了确定在任何给定时间使用(并保留)的传输速率,以使得两者相匹配的方式使得浪费的带宽最小化,数据流被分成选择的块,使得平均 整个块的比特率不低于任何较短的块从同一点开始的平均比特率。 然后可以使用该平均速率传输块而没有任何缓冲问题。 优选地,选择块,使得块的平均比特率不小于从相同点开始的任何较短或更长块的平均比特率。 这样做的好处是,带宽请求永远不会要求高于任何先前的这种请求中指定的分配。 在不同程度压缩的流之间进行切换的系统。 切换点可以有利地被选择为与块间边界一致。