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184 条记录 (耗时 0.069 秒)

    Thermoelectric Materials and Methods for Synthesis Thereof
    111.
    发明申请
    Thermoelectric Materials and Methods for Synthesis Thereof 有权
    热电材料及其合成方法

    公开(公告)号：US20130256609A1

    公开(公告)日：2013-10-03

    申请号：US13799498

    申请日：2013-03-13

    申请人： Zhifeng Ren ,  Qinyong Zhang ,  Qian Zhang ,  Gang Chen

    发明人： Zhifeng Ren ,  Qinyong Zhang ,  Qian Zhang ,  Gang Chen

    IPC分类号： H01L35/16

    CPC分类号： H01L35/16 ,  C01B19/002 ,  C01P2002/50 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2006/40 ,  H01L35/34

    摘要： Materials having improved thermoelectric properties are disclosed. In some embodiments, lead telluride/selenide based materials with improved figure of merit and mechanical properties are disclosed. In some embodiments, the lead telluride/selenide based materials of the present disclosure are p-type thermoelectric materials formed by adding sodium (Na), silicon (Si) or both to thallium doped lead telluride materials. In some embodiments, the lead telluride/selenide based materials are formed by doping lead telluride/selenides with potassium.

    摘要翻译： 公开了具有改进的热电特性的材料。 在一些实施方案中，公开了具有改善的品质因数和机械性能的碲化铅/硒化物基材料。 在一些实施方案中，本公开的碲化铅/硒化物基材料是通过将钠（Na），硅（Si）或两者加入到掺杂铊的碲化铅材料形成的p型热电材料。 在一些实施方案中，基于碲化铅/硒化物的材料通过用钾掺杂铅碲化物/硒化物而形成。

    Quality of service differentiation in wireless networks
    115.
    发明授权
    Quality of service differentiation in wireless networks 失效

    公开(公告)号：US07602707B2

    公开(公告)日：2009-10-13

    申请号：US11035291

    申请日：2005-01-12

    申请人： Zihua Guo ,  Wenwu Zhu ,  Qian Zhang ,  Jun Zhao

    发明人： Zihua Guo ,  Wenwu Zhu ,  Qian Zhang ,  Jun Zhao

    IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

    CPC分类号： H04W74/0816 ,  H04W28/18 ,  H04W28/24 ,  H04W74/006 ,  H04W74/0833

    摘要： A method provides differentiated quality of service (QoS) by providing adaptive updates to media access control (MAC) layer parameters on a distributed basis. The method includes calculating a failure probability for a transmission over the network, determining a target value for determining a contention window according to a mapped function of the failure probability, and altering the contention window according to a scaling function of the target value. The mapped function and the scaling can provide QoS differentiation. A wireless device ensures fairness in a wireless time slotted network and includes a network interface card (NIC), a network driver interface, a network monitor, a statistics engine, and an adaptive parameter engine for determining a target value for determining a contention window according to a mapped function of the one or more probabilities to enable an alteration of the contention window and provide new parameters for the MAC layer.

    Compound transmission control protocol
    117.
    发明授权
    Compound transmission control protocol 有权
    复合传输控制协议

    公开(公告)号：US07577097B2

    公开(公告)日：2009-08-18

    申请号：US11085978

    申请日：2005-03-22

    申请人： Kun Tan ,  Qian Zhang

    发明人： Kun Tan ,  Qian Zhang

    IPC分类号： H04L12/26 ,  H04J3/14 ,  G06F15/16

    CPC分类号： H04L29/06 ,  H04L1/187 ,  H04L47/10 ,  H04L47/193 ,  H04L47/283 ,  H04L69/16 ,  H04L69/163

    摘要： Systems and methods for Compound TCP are described. In one aspect, a single TCP connection is opened for communication of data over a compound stream between first and second computing devices. The compound stream includes two or more logical data streams to emulate congestion control behavior of multiple separate network (TCP) connections. Data flow over the compound stream is managed with multiple different congestion control schemes.

    摘要翻译： 描述了复合TCP的系统和方法。 在一个方面，打开单个TCP连接用于在第一和第二计算设备之间的复合流上的数据通信。 复合流包括两个或多个逻辑数据流，以模拟多个单独网络（TCP）连接的拥塞控制行为。 复合流中的数据流由多个不同的拥塞控制方案管理。

    Robust, inferentially synchronized transmission of compressed transport-layer-protocol headers
    118.
    发明授权
    Robust, inferentially synchronized transmission of compressed transport-layer-protocol headers 有权

    公开(公告)号：US07558244B2

    公开(公告)日：2009-07-07

    申请号：US11082496

    申请日：2005-03-17

    申请人： HongBin Liao ,  Qian Zhang ,  Wenwu Zhu ,  Ya-Qin Zhang

    发明人： HongBin Liao ,  Qian Zhang ,  Wenwu Zhu ,  Ya-Qin Zhang

    IPC分类号： H04J3/06

    CPC分类号： H04L69/04 ,  H04L47/10 ,  H04L47/193 ,  H04L47/27 ,  H04L47/37 ,  H04L69/16 ,  H04L69/161 ,  H04L69/163 ,  H04L69/22 ,  H04L69/326

    摘要： An implementation of a technology, described herein, for transmitting compressed network transport-layer-protocol headers in a speedy, efficient, inferentially synchronized, and robust manner. An implementation, described herein, models the transmission of compressed headers to the congestion procedure of the network transport-layer protocol (e.g., TCP's). Doing so, the sender of the compressed headers can infer whether the receiver correctly received them. Unlike the slow direct synchronization employed by conventional schemes, this implementation of the present claimed invention inferentially synchronizes by modeling after the congestion procedure of the network transport-layer protocol. This is inherently faster than direct synchronization. Since the implementation performs well over both noiseless and noisy links, it is particularly suited to use over wireless communications channels. This abstract itself is not intended to limit the scope of this patent. The scope of the present invention is pointed out in the appending claims.

    Vertical roaming in wireless networks through improved quality of service measures
    120.
    发明授权
    Vertical roaming in wireless networks through improved quality of service measures 有权
    通过提高服务质量的措施，在无线网络中进行垂直漫游

    公开(公告)号：US07499432B2

    公开(公告)日：2009-03-03

    申请号：US10968696

    申请日：2004-10-18

    申请人： Zihua Guo ,  Qian Zhang ,  Richard Yao ,  Wenwu Zhu

    发明人： Zihua Guo ,  Qian Zhang ,  Richard Yao ,  Wenwu Zhu

    IPC分类号： H04Q7/00 ,  H04J3/00 ,  H04B7/212 ,  H04L12/43

    CPC分类号： H04W36/0088 ,  H04W36/04 ,  H04W36/14 ,  H04W36/22

    摘要： A system and method for improved vertical handoff between different types of wireless network. Network allocation vector occupation and packet collision probability are used as quality of service measures, enabling vertical handoffs to be delayed until actually beneficial to quality of service. Improved wireless network cell boundary detection in vertical handoff scenarios is achieved with a Fourier-based technique in conjunction with an adaptively determined minimum operating signal strength threshold. Improved wireless network cell boundary detection enables vertical handoffs from high quality of service networks to be delayed as long as possible. Together, practical wireless network quality of service measures and improved detection of wireless network cell boundaries in vertical handoff scenarios reduce the rate of unnecessary vertical handoff resulting in higher overall quality of service experienced by a mobile computing device roaming between wireless network types.

    摘要翻译： 一种用于改善不同类型无线网络之间的垂直切换的系统和方法。 网络分配向量占用和分组冲突概率被用作服务质量度量，使得垂直切换被延迟，直到实际上有益于服务质量。 利用基于傅里叶的技术结合自适应确定的最小操作信号强度阈值来实现垂直切换场景中改进的无线网孔单元边界检测。 改进的无线网络小区边界检测能够使来自高质量服务网络的垂直切换尽可能延迟。 总而言之，在垂直切换场景中实际的无线网络服务质量测量和无线网络小区边界的改进检测降低了不必要的垂直切换的速率，从而导致无线网络类型之间漫游的移动计算设备所经历的更高的整体服务质量。