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    Systematic coding technique
    113.
    发明授权
    Systematic coding technique 有权

    公开(公告)号：US09430443B1

    公开(公告)日：2016-08-30

    申请号：US14707211

    申请日：2015-05-08

    Applicant: Norwegian University of Science and Technology

    Inventor： Rune Erlend Jensen ,  Katina Kralevska ,  Danilo Gligoroski ,  Sindre Berg Stene

    IPC: G06F17/16 ,  H03M13/11

    CPC classification number: H03M13/1174 ,  H03M13/033 ,  H03M13/134 ,  H03M13/373 ,  H03M13/6502

    Abstract: Disclosed herein is a method of generating a generator matrix for defining how to systematically code source data, the method comprising: determining source nodes for comprising a plurality of sub-stripes of source data, wherein the number of source nodes is K and the number of sub-stripes of source data comprised by each source node is S; determining redundant nodes for comprising a plurality of sub-stripes of coded data, wherein the number of redundant nodes is R and the number of sub-stripes of coded data comprised by each redundant node is S; determining values of a first generator matrix according to a systematic coding technique such that K of the rows of the generator matrix to define how to generate all of the K source nodes as comprising source data and R of the rows of the first generator matrix define how to generate all of the R redundant nodes as comprising combinations of two or more of the source nodes; generating a second generator matrix, with a first dimension (K×S) and a second dimension ((K+R)×S), in dependence on the determined first generator matrix, wherein each value of the second generator matrix defines how to generate the data comprised by a respective sub-stripe of a node defined by the first generator matrix such that the values of the second generator matrix define how to generate all of the sub-stripes of all of the nodes defined by the first generator matrix; and changing one or more of the values of the second generator matrix so that a sub-stripe of at least one of the redundant nodes is defined, by the systematic coding technique, as being dependent on a combination of two or more sub-stripes of data in the source nodes and is further defined as being dependent on one or more further sub-stripes of data, in a respective one or more source nodes, that the sub-stripe of the redundant node was not defined as being dependent on by the systematic coding technique. Advantageously, when the second generator matrix is used to generate erasure coded data in a data storage system, the amount of data that needs to be obtained to reconstruct a lost data node is less than if Reed-Solomon or other known coding techniques had been used.

    APPARATUS AND METHOD FOR PRIMING A MOLTEN METAL FILTER
    114.
    发明申请
    APPARATUS AND METHOD FOR PRIMING A MOLTEN METAL FILTER 有权
    用于制备金属过滤器的装置和方法

    公开(公告)号：US20150322543A1

    公开(公告)日：2015-11-12

    申请号：US14396968

    申请日：2013-04-25

    Applicant: NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY (NTNU)

    Inventor： Mark William KENNEDY ,  Shahid AKHTAR ,  Robert FRITZSCH ,  Jon Arne BAKKEN ,  Ragnhild Elisabeth AUNE

    IPC: C22B9/02 ,  C22B21/06 ,  B01D37/02

    CPC classification number: C22B9/023 ,  B01D37/02 ,  C22B9/003 ,  C22B21/066 ,  Y02P10/234

    Abstract: An apparatus and method are described for effectively priming a non-electrically conductive filter for removal of solid inclusions from liquid metal. In one embodiment, the ceramic filter media is surrounded by a low frequency induction coil (1-60 Hz) with its axis aligned in the direction of the net metal flow. The coil is positioned to enhance the heating of any metal frozen onto, or in the pores of the filter element. In one embodiment, the coil is positioned in order to generate Lorentz forces, which act to cause heated metal to impinge on the upper surface of the filter element, enhancing the priming action. Once a filter equipped with such a coil has been primed, it can be kept hot or reheated, and subsequently reused during several batch tapping sequences.

    Abstract translation: 描述了一种用于有效地起动用于从液态金属去除固体夹杂物的非导电过滤器的装置和方法。 在一个实施例中，陶瓷过滤介质被低频感应线圈（1-60Hz）包围，其轴线在净金属流的方向上对齐。 定位线圈以增强冷冻在过滤元件的孔中或其中的任何金属的加热。 在一个实施例中，线圈被定位以产生洛伦兹力，其用于使加热的金属撞击过滤元件的上表面，增强起动作用。 一旦配备有这种线圈的过滤器已被起动，则可以将其保持热或再加热，并且随后在多次批量分选序列期间重复使用。

    WELL TESTING
    116.
    发明申请
    WELL TESTING 有权
    好的测试

    公开(公告)号：US20140318234A1

    公开(公告)日：2014-10-30

    申请号：US14358560

    申请日：2012-11-16

    Applicant: NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY (NTNU) ,  SINVENT AS

    Inventor： Frederico Zenith ,  Johannes Tjønnås ,  Ingrid Schjølberg ,  Bjarne Foss ,  Vidar Gunnerud

    IPC: G01V11/00 ,  E21B47/06 ,  E21B47/10

    CPC classification number: G01V11/00 ,  E21B47/06 ,  E21B47/065 ,  E21B47/10 ,  E21B49/008

    Abstract: A method of well testing to determine properties of oil and gas wells 8 comprises: applying oscillations to the flow rate and/or pressure at multiple wells 8 wherein the oscillations applied at different wells of the multiple wells are at different test frequencies; receiving measurements of flow rate in flows downstream of a production header that combines the flows from the multiple wells 8, and/or receiving measurements of pressure and/or temperature from individual wells 8; carrying out a frequency analysis of the pressure, flow rate and/or temperature measurements to determine pressure, flow rate and/or temperature variations induced by the applied oscillations; and determining properties of the different wells 8 of the multiple wells 8 based on the results of the frequency analysis at the test frequencies for the wells 8.

    Abstract translation: 用于确定油气井8的性质的井测试方法包括：将振荡施加到多个井8处的流速和/或压力，其中施加在多个井的不同井处的振荡处于不同的测试频率; 接收组合来自多个井8的流的生产头部下游的流中的流量测量和/或接收来自各个井8的压力和/或温度的测量值; 进行压力，流量和/或温度测量的频率分析，以确定由施加的振荡引起的压力，流速和/或温度变化; 并且基于孔8的测试频率处的频率分析的结果来确定多个孔8的不同孔8的性质。

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