公开(公告)号：US07050668B2

公开(公告)日：2006-05-23

申请号：US10464929

申请日：2003-06-19

Applicant: Krishnan Kumaran ,  Nachi K. Nithi ,  Carl Jeremy Nuzman

Inventor： Krishnan Kumaran ,  Nachi K. Nithi ,  Carl Jeremy Nuzman

IPC: G02B6/26 ,  G02B6/42

CPC classification number: H04Q11/0005 ,  H04Q2011/0049

Abstract: Techniques and systems for control of optical switching arrays are described. A switch array controller according to an aspect of the present invention operates so as to achieve reduced power consumption and maintain crosstalk within acceptable limits. Various rules are applied in order to insure that the desired criteria are met. In order to reduce transient effects, switching from one output to another is accomplished in a sequence chosen to maximize the number of transitions occurring in those portions of the array not carrying a signal, and to minimize the number of transitions that occur in portions of the array carrying the signal. Transitions are made in the portion of the array to which the signal will be directed, then a switch is transitioned between the old and new signal paths, and finally further transitions are made in the portion of the array within which the signal was previously directed.

Abstract translation: 描述了用于控制光学开关阵列的技术和系统。 根据本发明的一个方面的开关阵列控制器的操作是为了实现降低的功耗并将串扰保持在可接受的限度内。 应用各种规则以确保满足期望的标准。 为了减少瞬态效应，从一个输出到另一个输出的切换是按照选择的序列来实现的，以使不发生信号的阵列的这些部分中发生的转换次数最大化，并且最小化在 阵列携带信号。 在信号将被引导到的阵列的部分中进行转换，然后在旧信号路径和新信号路径之间转换开关，并且最后在阵列的先前指向信号的部分中进行进一步的转换。

公开(公告)号：US5999819A

公开(公告)日：1999-12-07

申请号：US48384

申请日：1998-03-26

Applicant: Sanjeev Khanna ,  Krishnan Kumaran

Inventor： Sanjeev Khanna ,  Krishnan Kumaran

IPC: H04W16/18 ,  H04Q7/00

CPC classification number: H04W16/18

Abstract: A method for designing a wireless telecommunications system having a plurality of cells is provided. In one embodiment of such a method, a call demand per cell is estimated, and a channel demand based thereon is determined on a cell-by-cell basis. The cell-by-cell channel demand is used to provide a reasonably tight upper bound on the number of communication channels required to satisfy the system-wide call demand. It is implicit in the procedure for estimating the upper bound that no mutually "interfering" base stations use the same channel (i.e., frequency). "Cliques" of mutually-interfering base stations or cells are defined. A channel demand is determined for each clique by adding up the channel demand for each cell in the clique. The greatest channel demand of all cliques determines a "maximum clique demand" .omega..sup.d. The upper bound on the number of channels required to satisfy the system-wide call demand is given by the expression: .chi..sup.d .ltoreq.17/12.multidot..omega..sup.d when mutually-interfering cells are adjacent cells, and is given by the expression: .chi..sup.d .ltoreq.2.multidot..omega..sup.d -d.sub.min when mutually interfering cells are adjacent cells and next-to-adjacent cells, wherein d.sub.min is a minimum channel demand of all cells in the system. Having a reasonably-good estimate of the upper bound on the system-wide channel requirement, a wireless service provider may then seek to obtain or allot a commensurate amount of frequency spectrum to support its system.

Abstract translation: 提供了一种用于设计具有多个单元的无线电信系统的方法。 在这种方法的一个实施例中，估计每个小区的呼叫需求，并且在逐个小区的基础上确定基于其的信道需求。 逐单元通道需求用于为满足系统范围的呼叫需求所需的通信信道的数量提供合理的上限。 在用于估计上限的过程中，没有相互“干扰”的基站使用相同的信道（即频率）是隐含的。 定义了相互干扰的基站或小区的“集群”。 通过对集团中的每个小区的信道需求相加来确定每个集团的信道需求。 所有团体最大的渠道需求决定了“最高集团需求”欧米加d。 满足全系统呼叫需求所需的信道数量的上限由互相干扰的小区是相邻小区时由以下表达式表示：chi d

公开(公告)号：US10352099B2

公开(公告)日：2019-07-16

申请号：US15208704

申请日：2016-07-13

Applicant: Benjamin Spivey ,  Gregory S. Payette ,  Darren Pais ,  Krishnan Kumaran ,  Lei Wang ,  Jeffrey R. Bailey ,  Paul E. Pastusek

Inventor： Benjamin Spivey ,  Gregory S. Payette ,  Darren Pais ,  Krishnan Kumaran ,  Lei Wang ,  Jeffrey R. Bailey ,  Paul E. Pastusek

IPC: E21B44/02 ,  E21B47/12 ,  E21B47/06 ,  E21B45/00 ,  E21B7/00

Abstract: Methods for drilling a wellbore within a subsurface region and drilling assemblies and systems that include and/or utilize the methods are disclosed herein. The methods include receiving a plurality of drilling performance indicator maps, normalizing the plurality of drilling performance indicator maps to generate a plurality of normalized maps, adaptive trending of the plurality of drilling performance indicator maps to generate a plurality of trended maps, summing the plurality of trended maps to generate an objective map, selecting a desired operating regime from the objective map, and adjusting at least one drilling operational parameter of a drilling rig based, at least in part, on the desired operating regime.

公开(公告)号：US20190106976A1

公开(公告)日：2019-04-11

申请号：US16133941

申请日：2018-09-18

Applicant: Thomas A. Badgwell ,  Paul E. Pastusek ,  Krishnan Kumaran ,  David J. Schmidt

Inventor： Thomas A. Badgwell ,  Paul E. Pastusek ,  Krishnan Kumaran ,  David J. Schmidt

IPC: E21B44/02 ,  E21B45/00 ,  G05B11/42

Abstract: A controller system, comprising: a controller configured to control toward a desired process value, an arrangement to repetitively measure a value of the desired process value; wherein the controller is configured to execute a routine that: determines a moving average of the measured values, determines a moving standard deviation of the measured values, defines an outer zone of measured values with the determined moving average and a first plurality of the determined moving standard deviation, defines an inner zone of measured values with the determined moving average and a second plurality of the determined moving standard deviation, monitors the measured values for the occurrence of a first statistical event with respect to the outer zone and adjusting a gain of the controller by a first factor upon detection of the first statistical event, monitors the measured values for the occurrence of a second statistical event with respect to the inner zone and adjusting a gain of the controller by a second factor upon detection of the second statistical event.

公开(公告)号：US20190048704A1

公开(公告)日：2019-02-14

申请号：US16022174

申请日：2018-06-28

Applicant: Krishnan Kumaran

Inventor： Krishnan Kumaran

IPC: E21B44/02 ,  E21B3/02 ,  E21B47/12

Abstract: Methods of drilling a wellbore within a subsurface region and drilling control systems that perform the methods. The methods include accessing an objective map and calculating a plurality of critical points of the objective map. The methods also include scoring each critical point and selecting a selected critical point of the plurality of critical points. The selected critical point describes an estimated value of at least one drilling performance indicator for a selected value of at least one independent operational parameter. The methods further include operating the drilling rig at the selected value of the at least one independent operational parameter and, during the operating, determining an actual value of the at least one drilling performance indicator. The methods also include updating the objective map to generate an updated objective map and repeating at least a portion of the methods.

公开(公告)号：US09333497B2

公开(公告)日：2016-05-10

申请号：US14192995

申请日：2014-02-28

Applicant: Teh C. Ho ,  Krishnan Kumaran ,  Richard C. Dougherty

Inventor： Teh C. Ho ,  Krishnan Kumaran ,  Richard C. Dougherty

IPC: B01J38/56 ,  G05B23/02 ,  B01J8/02 ,  C10G49/00 ,  C10G75/00 ,  C10G75/04

CPC classification number: B01J38/56 ,  B01J8/02 ,  B01J2208/0007 ,  B01J2208/00539 ,  B01J2208/00707 ,  B01J2219/00211 ,  B01J2219/00213 ,  B01J2219/00231 ,  C10G49/002 ,  C10G75/00 ,  C10G75/04 ,  G05B23/0254

Abstract: The behavior of a monitored condition over time for a reactor or reaction system can be analyzed using groupings or windows of data to identify anomalous features in the time-average values. Anomalous features can be identified based on a threshold value generated from the analysis. Based on identification of an anomalous feature, a corrective action can be taken. For example, when the monitored condition is the pressure drop across a catalyst bed, detection of an anomaly can indicate the time to initiate a wash process for the catalyst bed before a large drop in catalyst activity occurs. By detecting an anomaly at an earlier point in time, a wash cycle can be initiated earlier so that the wash is more effective at restoring the catalyst bed to a desired condition.

Abstract translation: 可以使用数据分组或窗口来分析反应堆或反应系统的监测条件随时间的行为，以识别时间平均值中的异常特征。 可以基于从分析生成的阈值来识别异常特征。 基于异常特征的识别，可采取纠正措施。 例如，当监测条件是催化剂床上的压降时，异常的检测可以指示在催化剂活性发生大的下降之前催化剂床的启动洗涤过程的时间。 通过在较早的时间点检测异常，可以更早地启动洗涤循环，使得洗涤在将催化剂床恢复到所需条件下更有效。

公开(公告)号：US20150060056A1

公开(公告)日：2015-03-05

申请号：US14446132

申请日：2014-07-29

Applicant: Krishnan Kumaran ,  Randy C. Tolman ,  Renzo M. Angeles Boza ,  Timothy I. Morrow ,  Eric R. Grueschow

Inventor： Krishnan Kumaran ,  Randy C. Tolman ,  Renzo M. Angeles Boza ,  Timothy I. Morrow ,  Eric R. Grueschow

IPC: E21B44/00

CPC classification number: E21B44/005

Abstract: Systems and methods for restricting fluid flow in a casing conduit, including a wellbore that extends within a subterranean formation, a casing string that extends within the wellbore and defines a portion of the casing conduit, a plurality of motion-arresting structures that project from an inner surface of the casing string to define a plurality of reduced-area regions of the casing conduit, and an autonomous sealing device that defines a contracted configuration and an expanded configuration. The methods include conveying the autonomous sealing device through the casing conduit, determining that the autonomous sealing device is located within a target portion of the casing conduit, expanding the autonomous sealing device to the expanded configuration, retaining the autonomous sealing device on a selected motion-arresting structure, and restricting fluid flow within the casing conduit with the autonomous sealing device.

Abstract translation: 用于限制套管导管中的流体流动的系统和方法，包括在地层内延伸的井筒，在井筒内延伸并限定套管导管的一部分的套管柱，多个运动拦截结构， 套管柱的内表面以限定套管导管的多个缩小区域区域，以及限定收缩构造和扩展构造的自主密封装置。 所述方法包括通过套管导管输送自动密封装置，确定自动密封装置位于套管导管的目标部分内，将自动密封装置膨胀至膨胀构型，将自动密封装置保持在选定的运动 - 使用自动密封装置阻止套管内的流体流动。

公开(公告)号：US20130064040A1

公开(公告)日：2013-03-14

申请号：US13695226

申请日：2011-04-22

Applicant: Matthias G. Imhof ,  Pavel Dimitrov ,  Kelly Wrobel ,  Krishnan Kumaran ,  Martin J. Terrell ,  Stefan Hussenoeder

Inventor： Matthias G. Imhof ,  Pavel Dimitrov ,  Kelly Wrobel ,  Krishnan Kumaran ,  Martin J. Terrell ,  Stefan Hussenoeder

IPC: G01V1/30

CPC classification number: G01V1/30 ,  G01V1/302 ,  G01V1/306 ,  G01V1/307 ,  G01V1/345 ,  G01V2210/63 ,  G01V2210/64 ,  G01V2210/74

Abstract: Method for analyzing seismic data representing a subsurface region for presence of a hydrocarbon system or a particular play. Seismic attributes are computed, the attributes being selected to relate to the classical elements of a hydrocarbon system, namely reservoir, seal, trap, source, maturation, and migration. Preferably, the attributes are computed along structural fabrics (1) of the subsurface region, and are smoothed over at least tens or hundreds of data voxels. The resulting geologic attributes (2) are used to analyze the data for elements of the hydrocarbon system and/or recognition of specific plays, and for ranking and annotating partitioned regions (3) of the data volume based on size, quality, and confidence in the prospectivity prediction (5). A catalogue (8) of hydrocarbon trap configurations may be created and used to identify potential presence of hydrocarbon traps and/or aid in scoring (4) and ranking partitioned regions as hydrocarbon prospects.

Abstract translation: 用于分析表示烃系统或特定游戏的存在的地下区域的地震数据的方法。 计算地震属性，选择属性与烃系统的古典元素相关，即储层，密封，陷阱，源，成熟和迁移。 优选地，沿着地下区域的结构织物（1）计算属性，并且在至少数十或数百个数据体素上平滑。 所得到的地质属性（2）用于分析烃系统的元素和/或特定游戏的识别数据，以及基于大小，质量和置信度对数据量的分割区域（3）进行排名和注释 前景预测（5）。 可以创建碳捕集器构造目录（8）并用于识别碳氢化合物阱的潜在存在和/或帮助评分（4）并将分区区域作为碳氢化合物前景。

公开(公告)号：US08051828B2

公开(公告)日：2011-11-08

申请号：US12316030

申请日：2008-12-09

Applicant: Bhaskar Sengupta ,  Krishnan Kumaran ,  Walter Weissman ,  Randall D. Partridge ,  Kouseki Sugiyama ,  Keiji Yoeda ,  Tomihisa Oda ,  Yoshihiro Iwashita

Inventor： Bhaskar Sengupta ,  Krishnan Kumaran ,  Walter Weissman ,  Randall D. Partridge ,  Kouseki Sugiyama ,  Keiji Yoeda ,  Tomihisa Oda ,  Yoshihiro Iwashita

IPC: F02M43/04 ,  F02M43/00

CPC classification number: F02D41/0025 ,  F02M37/0064 ,  F02M37/0088 ,  Y02T10/36 ,  Y10T137/2509 ,  Y10T137/27

Abstract: A fuel management system mounted on a vehicle is operative to feed individually or a mixture of grades of relatively low, intermediate, and high autoignition temperature fuels to an associated internal combustion engine. The system includes an on board separation unit (OBS unit) for receiving and separating intermediate autoignition temperature (IAT) fuel into low and high autoignition temperature fuels, LAT and HAT, respectively. The production rate of the LAT and HAT fuels by the OBS unit is controlled to substantially match the consumption requirements of the engine at any given time for the LAT and HAT fuels.

Abstract translation: 安装在车辆上的燃料管理系统可操作以将相对低的，中等的和高的自燃温度燃料的等级的单独的或混合物供给到相关联的内燃机。 该系统包括用于分别将中间自燃温度（IAT）燃料接收和分离成低和高自燃温度燃料LAT和HAT的船上分离单元（OBS单元）。 控制OBS装置的LAT和HAT燃料的生产率在任何给定的时间基本匹配了发动机对LAT和HAT燃料的消耗要求。

公开(公告)号：US20090242038A1

公开(公告)日：2009-10-01

申请号：US12316030

申请日：2008-12-09

Applicant: Bhaskar Sengupta ,  Krishnan Kumaran ,  Walter Weissman ,  Randall D. Partridge

Inventor： Bhaskar Sengupta ,  Krishnan Kumaran ,  Walter Weissman ,  Randall D. Partridge

IPC: G05D11/00

CPC classification number: F02D41/0025 ,  F02M37/0064 ,  F02M37/0088 ,  Y02T10/36 ,  Y10T137/2509 ,  Y10T137/27

Abstract: A fuel management system mounted on a vehicle is operative to feed individually or a mixture of grades of relatively low, intermediate, and high autoignition temperature fuels to an associated internal combustion engine. The system includes an on board separation unit (OBS unit) for receiving and separating intermediate autoignition temperature (IAT) fuel into low and high autoignition temperature fuels, LAT and HAT, respectively. The production rate of the LAT and HAT fuels by the OBS unit is controlled to substantially match the consumption requirements of the engine at any given time for the LAT and HAT fuels.

Abstract translation: 安装在车辆上的燃料管理系统可操作以将相对低的，中等的和高的自燃温度燃料的等级的单独的或混合物供给到相关联的内燃机。 该系统包括用于分别将中间自燃温度（IAT）燃料接收和分离成低和高自燃温度燃料LAT和HAT的船上分离单元（OBS单元）。 控制OBS装置的LAT和HAT燃料的生产率在任何给定的时间基本匹配了发动机对LAT和HAT燃料的消耗要求。