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    METHOD OF ASSESSING POSITIONAL UNCERTAINTY IN DRILLING A WELL
    41.
    发明公开
    METHOD OF ASSESSING POSITIONAL UNCERTAINTY IN DRILLING A WELL 有权
    法位置中的一个水井钻探中的不确定性客观评定

    公开(公告)号：EP1252415A1

    公开(公告)日：2002-10-30

    申请号：EP00985471.2

    申请日：2000-12-07

    申请人： DEN NORSKE STATS OLJESELSKAP AS

    发明人： HAARSTRAD, Ivar

    IPC分类号： E21B47/022

    CPC分类号： E21B47/022

    摘要： A method is provided for estimating the positional uncertainty in drilling a well such as an oil well. A first set of values is supplied representing a first three-dimensional uncertainty of the actual position of a drill bit with respect to the estimated position. A second set of values is supplied representing a second three-dimensional uncertainty of the actual position of a geological feature with respect to the estimated position thereof. For example, the first set of values relates to positional uncertainties because of the drilling procedure whereas the second set of uncertainties is associated with the obtaining and interpretation of seismic data. The first and second sets of values are combined to form a third set of values which represents a third uncertainty of the position of the drill bit with respect to the geological feature. A probability is then calculated from the third uncertainty and gives the probability that the drill bit will reach a predetermined position relative to the geological feature.

    Amplifier
    43.
    发明公开
    Amplifier 有权
    KreuzgekoppelterDifferenzverstärker

    公开(公告)号：EP1231709A1

    公开(公告)日：2002-08-14

    申请号：EP02250099.5

    申请日：2002-01-08

    申请人： Zarlink Semiconductor Limited

    发明人： Madni, Arshad ,  Mudd, Mark

    IPC分类号： H03F3/45

    CPC分类号： H03G1/0023 ,  H03F3/45085 ,  H03F2200/294 ,  H03F2200/372

    摘要： A radio frequency amplifier of improved intermodulation performance is provided by connecting first and second transconductance amplifiers (T3, T4, T5, T6, R3, R4, R5, R6) in antiphase so that third order intermodulation products cancel each other but the reduction in gain is relatively small. The transconductance stages comprise long tail pairs of transistors (T3, T4, T5, T6) provided with tail current sources formed by transistors (T1, T2) whose bases are connected to a bias voltage source (1). The first transistor (T1) has an emitter connected via a resistor (R1) to ground. The second transistor (T2) has an emitter connected via another resistor (R2) to the emitter of the first transistor (T1).

    摘要翻译： 通过将第一和第二跨导放大器（T3，T4，T5，T6，R3，R4，R5，R6）反相连接来提供改善的互调性能的射频放大器，使得三阶互调产物相互抵消但增益的减小 比较小 跨导级包括提供有由基极连接到偏置电压源（1）的晶体管（T1，T2）形成的尾电流源的长尾对晶体管（T3，T4，T5，T6）。 第一晶体管（T1）具有经由电阻器（R1）连接到地的发射极。 第二晶体管（T2）具有通过另一电阻器（R2）连接到第一晶体管（T1）的发射极的发射极。

    LIQUID CRYSTAL DEVICE AND DISPLAY
    46.
    发明公开
    LIQUID CRYSTAL DEVICE AND DISPLAY 有权
    液晶显示装置

    公开(公告)号：EP1216433A1

    公开(公告)日：2002-06-26

    申请号：EP00960892.8

    申请日：2000-09-26

    申请人： Sharp Laboratories of Europe Limited

    发明人： Walton, Harry Garth ,  Towler, Michael John

    IPC分类号： G02F1/139

    CPC分类号： G02F1/1393

    摘要： A surface mode liquid crystal device, for example of the pi-cell type, comprises a layer of nematic liquid crystal (10) disposed between alignment layers (4, 9) and an electrode arrangement (3, 8). The nematic liquid crystal has viscosity coefficients θ1, θ2 and η1 such that (θ1-θ2)/η1 ≥ 1.15 or (θ1-θ2)/η1 ≤ 0.9.

    Tuner
    48.
    发明公开
    Tuner 有权
    调谐器

    公开(公告)号：EP1195889A2

    公开(公告)日：2002-04-10

    申请号：EP01307369.7

    申请日：2001-08-30

    申请人： Zarlink Semiconductor Limited

    发明人： Cowley, Nicholas Paul ,  Madni, Arshad

    IPC分类号： H03D7/18

    CPC分类号： H03J3/08 ,  H03D7/18

    摘要： An analogue single conversion tuner comprises a plurality of channels (1, 2, 3) for covering the whole of a desired reception bandwidth. Each tuner comprises an image reject mixer (18) connected to the tuner input (4) by a single tracking filter (16), for example of the single-tuned type.

    摘要翻译： 模拟单转换调谐器包括用于覆盖整个所需接收带宽的多个通道（1,2,3）。 每个调谐器包括通过单个跟踪滤波器（16）连接到调谐器输入（4）的图像拒绝混合器（18），例如单调谐型。

    DATA TRANSFER, SYNCHRONISING APPLICATIONS, AND LOW LATENCY NETWORKS
    50.
    发明公开
    DATA TRANSFER, SYNCHRONISING APPLICATIONS, AND LOW LATENCY NETWORKS 审中-公开
    数据传输方面，同步应用程序和网络具有小延迟

    公开(公告)号：EP1190317A2

    公开(公告)日：2002-03-27

    申请号：EP00925509.2

    申请日：2000-05-03

    申请人： AT & T Laboratories Cambridge Limited

    发明人： ROBERTS, Derek, Edward ,  POPE, Steven, Leslie ,  MAPP, Glenford, Ezra ,  HODGES, Stephen John

    IPC分类号： G06F9/46 ,  H04L29/06

    CPC分类号： G06F9/544 ,  G06F13/387 ,  H04L29/06 ,  H04L49/90 ,  H04L67/10 ,  H04L69/22 ,  H04L69/32 ,  H04L69/329

    摘要： A synchronous network interface and method of synchronisation between two applications on different computers is provided. The network interface contains snooping hardware which can be programmed to contain triggering values comprising either addresses, address ranges or other data which are to be matched. These data are termed 'trip wires'. Once programmed, the interface monitors the data stream, including address data, passing through the interface for addresses and data which match the trip wires which have been set. On a match, the snooping hardware can generate interrupts, increment event counters, or perform some other application-specified action. This snooping hardware is preferably based upon Content-Addressable Memory. The invention thus provides in-band synchronisation by using synchronisation primitives which are programmable by user level applications, while still delivering high bandwidth and low latency. The programming of the synchronisation primitives can be made by the sending and receiving applications independently of each other and no synchronisation information is required to traverse the network.