公开(公告)号：US08135379B2

公开(公告)日：2012-03-13

申请号：US12105932

申请日：2008-04-18

申请人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

发明人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

IPC分类号： H04M11/04

CPC分类号： H04W52/243 ,  H04W52/143

摘要： A portable telecommunications system (PTS) allows mobility and rapid deployment with minimal on-site configuration. PTS systems exchange multicast packets including location and identification information. A protocol manager sets up these communications channels, manages exchanges between PTS systems, and passes the data to or from internal system nodes. The PTS system detects when another PTS system is operating in close physical proximity and automatically perform actions, such as adjustment of transmission power level, to maintain service to the user base.

摘要翻译： 便携式电信系统（PTS）允许移动性和快速部署，并具有最少的现场配置。 PTS系统交换组播数据包，包括位置信息和识别信息。 协议管理器设置这些通信信道，管理PTS系统之间的交换，并将数据传递到内部系统节点或从内部系统节点传递数据。 PTS系统检测到另一个PTS系统是否在紧密的物理接近状态下运行，并自动执行诸如调整发射功率电平的动作，以维护用户群的服务。

公开(公告)号：US20090264162A1

公开(公告)日：2009-10-22

申请号：US12105932

申请日：2008-04-18

申请人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

发明人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

IPC分类号： H04M1/00

CPC分类号： H04W52/243 ,  H04W52/143

摘要： A portable telecommunications system (PTS) allows mobility and rapid deployment with minimal on-site configuration. PTS systems exchange multicast packets including location and identification information. A protocol manager sets up these communications channels, manages exchanges between PTS systems, and passes the data to or from internal system nodes. The PTS system detects when another PTS system is operating in close physical proximity and automatically perform actions, such as adjustment of transmission power level, to maintain service to the user base.

摘要翻译： 便携式电信系统（PTS）允许移动性和快速部署，并具有最少的现场配置。 PTS系统交换组播数据包，包括位置信息和识别信息。 协议管理器设置这些通信信道，管理PTS系统之间的交换，并将数据传递到内部系统节点或从内部系统节点传递数据。 PTS系统检测到另一个PTS系统是否在紧密的物理接近状态下运行，并自动执行诸如调整发射功率电平的动作，以维护用户群的服务。

公开(公告)号：US08027272B2

公开(公告)日：2011-09-27

申请号：US12105679

申请日：2008-04-18

申请人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

发明人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

IPC分类号： H04L12/28

CPC分类号： H04W24/04 ,  H04W84/02 ,  H04W84/10

摘要： A portable telecommunications system (PTS), and discovery and update protocol provides an ad-hoc system in which PTS systems can detect one another over a wide area network (WAN). The system may be compact in a way that allows mobility and rapid deployment with minimal on-site configuration. PTS systems exchange multicast packets and peer-to-peer data exchanges. A protocol manager sets up these communications channels, manages exchanges between PTS systems, and passes the data to or from internal system nodes. The protocol manager also performs key oversight functions such as signaling to other systems that a PTS is joining or leaving the community, keeping track of which other PTS systems are in the community and active, and determining when data needs to be updated and exchanged.

摘要翻译： 便携式电信系统（PTS）和发现和更新协议提供了一种自组织系统，其中PTS系统可以通过广域网（WAN）彼此检测。 该系统可以以允许移动性和快速部署并且具有最少的现场配置的方式来紧凑。 PTS系统交换组播数据包和对等数据交换。 协议管理器设置这些通信信道，管理PTS系统之间的交换，并将数据传递到内部系统节点或从内部系统节点传递数据。 协议管理器还执行关键监督功能，例如向PTS正在加入或离开社区的其他系统发出信号，跟踪社区中哪些其他PTS系统是活动的，以及确定何时需要更新和交换数据。

公开(公告)号：US20090262662A1

公开(公告)日：2009-10-22

申请号：US12105679

申请日：2008-04-18

申请人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

发明人： Sethuraman Ramachandran ,  Amy Derbyshire ,  Janardan Sethi ,  Douglas A. Sharp ,  Joseph Meagher ,  Mark Bailey ,  Mark Leifer ,  Mark Gibbard ,  Ramesh Ramiah ,  Raghavan Srinivasan ,  Mitch Cooper

IPC分类号： H04L12/28

CPC分类号： H04W24/04 ,  H04W84/02 ,  H04W84/10

摘要： A portable telecommunications system (PTS), and discovery and update protocol provides an ad-hoc system in which PTS systems can detect one another over a wide area network (WAN). The system may be compact in a way that allows mobility and rapid deployment with minimal on-site configuration. PTS systems exchange multicast packets and peer-to-peer data exchanges. A protocol manager sets up these communications channels, manages exchanges between PTS systems, and passes the data to or from internal system nodes. The protocol manager also performs key oversight functions such as signaling to other systems that a PTS is joining or leaving the community, keeping track of which other PTS systems are in the community and active, and determining when data needs to be updated and exchanged.

摘要翻译： 便携式电信系统（PTS）和发现和更新协议提供了一种自组织系统，其中PTS系统可以通过广域网（WAN）彼此检测。 该系统可以以允许移动性和快速部署并且具有最少的现场配置的方式来紧凑。 PTS系统交换组播数据包和对等数据交换。 协议管理器设置这些通信信道，管理PTS系统之间的交换，并将数据传递到内部系统节点或从内部系统节点传递数据。 协议管理器还执行关键监督功能，例如向PTS正在加入或离开社区的其他系统发信号，跟踪社区中哪些其他PTS系统是活动的，以及确定何时需要更新和交换数据。

公开(公告)号：US06895795B1

公开(公告)日：2005-05-24

申请号：US10180701

申请日：2002-06-26

申请人： Prabir K. Chaudhury ,  Raghavan Srinivasan ,  Srinath Viswanathan

发明人： Prabir K. Chaudhury ,  Raghavan Srinivasan ,  Srinath Viswanathan

IPC分类号： B21C23/00 ,  B21C25/02 ,  B21C33/00 ,  B21C35/00

CPC分类号： B21C35/00 ,  B21C23/00 ,  B21C23/001 ,  B21C23/005 ,  B21C25/02 ,  B21C33/00

摘要： A method of processing a billet of metallic material in a continuous manner to produce severe plastic deformation. The billet is moved through a series of CSPD dies in one operation to efficiently produce a billet characterized by a controlled grain structure. The long billets of metal stock are moved along the processing path through the CSPD dies with plural sets of pinch rolls which grip the billet and push it into the entry channel of the dies. Other sets of pinch rolls pull the billet from the exit channel of the dies.

摘要翻译： 以连续的方式处理金属材料坯料以产生严重的塑性变形的方法。 在一次操作中，钢坯通过一系列CSPD模具移动，以有效地生产以受控晶粒结构为特征的坯料。 金属坯料的长坯料通过CSPD模具沿着加工路径移动，多组夹送辊夹紧坯料并将其推入模具的进入通道中。 其他套夹辊从模具的出口通道拉出坯料。

公开(公告)号：US08551441B1

公开(公告)日：2013-10-08

申请号：US13470170

申请日：2012-05-11

申请人： Raghavan Srinivasan ,  Jonathan E. Spowart ,  Nicholas Gothard

发明人： Raghavan Srinivasan ,  Jonathan E. Spowart ,  Nicholas Gothard

IPC分类号： C01B19/04 ,  C04B35/515 ,  H01L21/02 ,  H01L29/02 ,  H01L35/14 ,  H01L35/16

CPC分类号： C01B19/04 ,  C01P2002/04 ,  C01P2002/77 ,  C01P2006/40 ,  C04B35/547 ,  C04B2235/766 ,  H01L35/18

摘要： New methods for improving thermoelectric properties of bismuth telluride based materials are described. Constrained deformation, such as by canned/sandwich, or encapsulated, rolling and plane strain channel die compression, particularly at temperatures above 80% of the melting point of the material on an absolute temperature scale, changes the crystallographic texture and grain size to desirably increase the values of both the thermoelectric power factor and the thermoelectric figure of merit ZT for the material.

摘要翻译： 描述了用于改善碲化铋基材料的热电性质的新方法。 受限制的变形，例如通过罐头/夹层或封装的，滚动和平面应变通道模压缩，特别是在绝对温度范围内材料熔点高于80％的温度下，晶体结构和晶粒尺寸会改变，以期望增加 材料的热电功率因数和热电性能ZT的值。

公开(公告)号：US06612150B2

公开(公告)日：2003-09-02

申请号：US10091828

申请日：2002-03-06

申请人： Raghavan Srinivasan

发明人： Raghavan Srinivasan

IPC分类号： G01N356

CPC分类号： G01N19/02 ,  G01N3/56 ,  G01N33/34 ,  G01N33/346 ,  G01N2203/0025 ,  G01N2203/0032 ,  G01N2203/0053 ,  G01N2203/0623

摘要： The present invention provides a device for testing the abrasiveness of paper and other sheet materials. The device comprises a punching module, a feed module for moving the material, a holding module that holds the material while the punching module penetrated the material, and an instrument that records and analyzes the amount of force needed to punch through the material and then calculates the abrasive properties of the material. The punching module comprises a punching instrument for punching the material, a driving mechanism for operating the punching instrument, and a measurement system that measures the amount of the force required to punch the material. A method for using the device is also provided.

公开(公告)号：US06233500B1

公开(公告)日：2001-05-15

申请号：US09053898

申请日：1998-04-02

申请人： James C. Malas ,  W. Garth Frazier ,  Enrique A. Medina ,  Venkat Seetharaman ,  S. Venugopal ,  R. Dennis Irwin ,  William M. Mullins ,  Steven C. Medeiros ,  Anil Chaudhary ,  Raghavan Srinivasan

发明人： James C. Malas ,  W. Garth Frazier ,  Enrique A. Medina ,  Venkat Seetharaman ,  S. Venugopal ,  R. Dennis Irwin ,  William M. Mullins ,  Steven C. Medeiros ,  Anil Chaudhary ,  Raghavan Srinivasan

IPC分类号： B29F324

CPC分类号： B21J5/00 ,  B21C23/00 ,  C21D7/13 ,  C21D11/00 ,  C22F1/00 ,  C22F1/183

摘要： A method for predicting process parameters for optimization and control of microstructure in metal and alloy products of hot working fabrication processes is described. The method uses state-space material behavior models and hot deformation process models for calculating optimal strain, strain rate and temperature trajectories for processing the material. Using the optimal trajectories and appropriate optimality criteria, suitable process parameters such as ram velocity and die profile for processing the material are determined to achieve prescribed strain, strain rate and temperature trajectories.

摘要翻译： 描述了一种用于预测热加工制造工艺中金属和合金产品中微结构优化和控制的工艺参数的方法。 该方法使用状态空间材料行为模型和热变形过程模型来计算材料的最佳应变，应变率和温度轨迹。 使用最佳轨迹和适当的最优标准，确定合适的工艺参数，例如冲程速度和模具轮廓，以处理材料以实现规定的应变，应变速率和温度轨迹。

公开(公告)号：US4762679A

公开(公告)日：1988-08-09

申请号：US70276

申请日：1987-07-06

申请人： Harold L. Gegel ,  Yellapregada V. R. K. Prasad ,  Sokka M. Doraivelu ,  Raghavan Srinivasan ,  J. S. Gunasekera ,  Douglas R. Barker ,  James T. Morgan, Jr. ,  James C. Malas ,  Kristine A. Lark ,  Lawrence E. Matson

发明人： Harold L. Gegel ,  Yellapregada V. R. K. Prasad ,  Sokka M. Doraivelu ,  Raghavan Srinivasan ,  J. S. Gunasekera ,  Douglas R. Barker ,  James T. Morgan, Jr. ,  James C. Malas ,  Kristine A. Lark ,  Lawrence E. Matson

IPC分类号： B22F3/20 ,  C03C14/00 ,  B22F3/24

CPC分类号： C03C14/004 ,  B22F3/20 ,  C03C2214/04 ,  C03C2214/08

摘要： A process for manufacturing powder metallurgy (P/M) preforms which are conditioned for optimum intrinsic workability is described which comprises steps of heating a quantity of P/M material in a can to a first preselected temperature under vacuum to degas the material, compacting the canned material at a second preselected temperature under pressure to provide a compact of the material; or cold compacting the powder to about 75% density and degassing it at suitable temperature and then vacuum hot pressing the powder at about 0.75 melting point; generating flow stress data as a function of strain rate and temperature on samples of the compact at predetermined strain within predetermined ranges of temperature and strain rate and determining powder dissipation efficiency of the compact and entropy rate ratio within those ranges of temperature and strain rate; selecting values of strain rate and extrusion temperature at which dynamic recrystallization is the dominant metallurgical mechanism characterizing the compact: and extruding the compact in an extrusion can at the selected extrusion temperature and at an extrusion rate corresponding to the selected strain rate using a streamlined die. An improved processing map for preselecting optimum processing parameters for the material is described.

摘要翻译： 描述了一种用于制造适于最佳固有可加工性的粉末冶金（P / M）预成型件的方法，其包括以下步骤：在罐中将一定数量的P / M材料在真空下加热到第一预选温度以使材料脱气， 在第二预选温度下在压力下的罐头材料提供该材料的压块; 或将粉末冷却至约75％的密度并在合适的温度下对其进行脱气，然后在约0.75熔点下真空热压该粉末; 在温度和应变速率的预定范围内，在预定应变下产生作为应变速率和温度的应变速率和温度的流动应力数据，并确定在这些温度和应变速率范围内的压实和熵比率的粉末散失效率; 选择应变速率和挤出温度的值，其中动态再结晶是表征压实体的主要冶金机理;并且使用流线型模具在选定的挤出温度下以对应于所选择的应变速率的挤出速率挤出挤出机中的压块。 描述了用于预选材料的最佳处理参数的改进的处理图。

公开(公告)号：US06201871B1

公开(公告)日：2001-03-13

申请号：US09136894

申请日：1998-08-19

申请人： Phil J. Bostley, III ,  Raghavan Srinivasan ,  Andrew D. Eckhardt

发明人： Phil J. Bostley, III ,  Raghavan Srinivasan ,  Andrew D. Eckhardt

IPC分类号： H04K100

CPC分类号： H04W88/08 ,  H04L9/0822 ,  H04L9/0841 ,  H04L9/3271 ,  H04L2209/80 ,  H04W12/04 ,  H04W12/06

摘要： The invention provides technology that improves the security of the A-Keys in a wireless communications system. The technology effectively prevents any human access to the A-Keys and eliminates cloning. The invention improves the security and integrity of the wireless communications system. A secure processor exchanges random numbers with a wireless communications device to generate the A-Key. The secure processor then encrypts the A-Key and transfers the encrypted A-Key to an authentication system. When the authentication system generates or updates the SSD, the authentication system transfers the encrypted A-Key and other information to the secure processor. The secure processor decrypts the A-Key and calculates the SSD. The secure processor transfers the SSD to the authentication system for use in authenticating the wireless communications device.

摘要翻译： 本发明提供了提高无线通信系统中的A-Keys的安全性的技术。 该技术有效地防止任何人类进入A-Keys并消除克隆。 本发明改进了无线通信系统的安全性和完整性。 安全处理器与无线通信设备交换随机数以生成A密钥。 然后安全处理器对A-Key进行加密，并将加密的A-Key传送到认证系统。 当认证系统生成或更新SSD时，认证系统将加密的A-Key和其他信息传送到安全处理器。 安全处理器解密A-Key并计算SSD。 安全处理器将SSD传输到认证系统以用于认证无线通信设备。