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公开(公告)号：US20240104745A1
公开(公告)日：2024-03-28
申请号：US18470503
申请日：2023-09-20
发明人： Martins AIMUFUA , Paul HUGHES , Paul BERRY
CPC分类号： G06T7/194 , G06T5/50 , G06V10/25 , G06V10/60 , G06V10/751 , G06V10/764 , G06T2207/20224
摘要： A method comprising: receiving a first image captured on an image sensor; obtaining a scene estimate for the first image, wherein the scene estimate comprises an estimate of the background signal for a region of space being imaged onto the sensor; storing the scene estimate in memory; receiving a plurality of successive images, wherein for each one of the successive images, the field of view is shifted with respect to the preceding image and overlaps partially with that of the preceding image; for each one of the successive images: retrieving the scene estimate from memory; subtracting the scene estimate from the image to obtain a background-subtracted image for output; updating the scene estimate based on the signal detected at the location on the image sensor to which the region of space is being imaged; and replacing the scene estimate stored in memory with the updated scene estimate.
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公开(公告)号：US20220024505A1
公开(公告)日：2022-01-27
申请号：US17297006
申请日：2019-11-28
发明人： Andrew BATCHELOR , Douglas WATSON
摘要： A computer-implemented method of determining a position of a vehicle 10 within a transport network comprises: obtaining track geometry data indicating track geometry of at least a part of the transport network; determining, based upon the track geometry data, that the vehicle is approaching a junction; determining, based upon the track geometry data, a plurality of route options from the junction; generating a plurality of Bayesian estimation filter algorithms each associated with a respective one of the plurality of route options and configured to estimate a position of the vehicle based upon the track geometry data indicative of the associated route option, wherein the plurality of Bayesian estimation filter algorithms are configured to output data indicative of probabilities of the vehicle taking the associated route options; monitoring the output of the plurality of Bayesian estimation filter algorithms as the vehicle passes through the junction; and determining the route option taken by the vehicle by selecting one of the plurality of route options which presents the highest probability based upon the output of the plurality of Bayesian estimation filter algorithms.
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公开(公告)号：US20220024504A1
公开(公告)日：2022-01-27
申请号：US17297001
申请日：2019-11-28
发明人： Andrew BATCHELOR , Douglas WATSON
摘要： A computer-implemented method of determining a position of a vehicle within a transport network comprises obtaining track geometry data indicating track geometry of at least a part of the transport network; receiving first sensor data from an inertial measurement unit mounted to the vehicle; executing a Bayesian estimation filter algorithm to predict a position of the vehicle, wherein the Bayesian estimation filter algorithm comprises a process model, the process model comprising a strapdown inertial navigation algorithm, and wherein the strapdown inertial navigation algorithm generates data indicative of the predicted position of the vehicle based at least upon the first sensor data and the track geometry data such that the predicted position of the vehicle lies on a track defined by the track geometry data; receiving second sensor data from a sensor other than an inertial measurement unit, wherein the sensor is mounted to the vehicle; executing the Bayesian estimation filter algorithm to update the predicted position of the vehicle based at least upon the second sensor data; and generating an output indicative of a position of the vehicle within the transport network based upon at least one of the predicted position of the vehicle and the updated predicted position of the vehicle.
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4.发明申请公开(公告)号：US20200167607A1
公开(公告)日：2020-05-28
申请号：US16692563
申请日：2019-11-22
摘要： A computer-implemented method for generating a simulated environment in which the behaviour of one or more individuals is modelled, the method comprising: defining a state of the environment at a first point in time; receiving an input defining an action to be performed by one or more individuals in the simulated environment; and in response to the input, updating the state of the environment based on a social-ecological model, wherein the social-ecological model simulates the behaviour of people within the environment and how the people respond to changes associated with said action, wherein the social-ecological model is a machine learning model that is trained using data reflective of real-life past events, the social-ecological model being configured to accept as input a parameterised dataset describing the state of the environment at the first point in time and to output an updated dataset that describes the updated state of the environment.
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公开(公告)号：US10435048B2
公开(公告)日：2019-10-08
申请号：US15569971
申请日：2016-02-09
发明人： William Saunders , Steve Samuels
摘要： A computer-implemented method for alerting a user to the presence of a fault in an electromechanical system in a railway infrastructure, the method comprising: receiving electrical usage data indicative of the value of an electrical usage parameter associated with the electromechanical system; receiving temperature data indicative of the present temperature of the electromechanical system; determining, based on a predetermined relationship between the electrical usage parameter and the temperature, whether or not the value of the electrical usage parameter is indicative of a fault in the electromechanical system and if so, issuing an alert to indicate the presence of the fault.
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公开(公告)号：US20190013001A1
公开(公告)日：2019-01-10
申请号：US16030314
申请日：2018-07-09
发明人： Andrew BOND , Alan ELLIOTT
摘要： In accordance with embodiments of the present disclosure, a flextensional transducer for underwater operation includes a driving element and a stave. The stave is made from a material with elastic properties and has a porous structure. The porous structure is adapted to be modelled such that when in use, said porous structure of the stave is of an arbitrary alignment with respect to, for instance, the driving element, and has a degree of porosity. The degree of porosity is such that the elastic properties and vibrational frequency response of the stave can be customised with respect to its intended use.
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公开(公告)号：US20180059238A1
公开(公告)日：2018-03-01
申请号：US15678898
申请日：2017-08-16
发明人： Malcolm Stevens , Richard Stroud
IPC分类号： G01S13/90
CPC分类号： G01S13/90
摘要： Methods and devices use information from the original SAR images to provide measurements that can be applied to corresponding change detection products. This produces reliable registration and alignment for the change products even when the imaging geometry is significantly changed. A method of processing synthetic aperture radar, SAR, image data comprising a plurality of frames of SAR image data for each of a plurality of image geometries; for each image geometry, applying change detection to the frames of SAR image data corresponding to that image geometry to produce a corresponding plurality of change products; selecting a plurality of said acquired frames as reference frames, one in respect of each image geometry; applying a multilook SAR process to the reference frames to produce a multilook SAR product, the multilook SAR process comprising at least one processing stage comprising measuring a property of the data contained in the reference frames and applying a transformation to the data governed by the measured property; and applying a multilook change process to the change products, the multilook change process comprising applying the same transformation as in the multilook SAR process, to the change products, to produce a multilook change product.
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公开(公告)号：US20170334532A1
公开(公告)日：2017-11-23
申请号：US15596527
申请日：2017-05-16
发明人： Sasha Roberts , Andrew Bond
CPC分类号： B63G7/06 , H01F1/14708 , H01F1/34 , H01F7/202
摘要： An electromagnet can be used to provide a controlled magnetic field, for example for the purpose of minesweeping. The electromagnet is constructed of a material which has a Curie temperature, such that the electromagnet can be stored at a temperature above the Curie temperature, but deployed below the Curie temperature in use.
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9.发明申请LASER DIODE SIDE PUMPING OF AN ELONGATED SOLID-STATE LASER WITHOUT FOCUSING/OPTICS 有权没有聚焦/光学的非线性固态激光器的激光二极管泵浦公开(公告)号：US20150263479A1
公开(公告)日：2015-09-17
申请号：US14431943
申请日：2013-08-08
发明人： Trevor Cook , Stephen Lee , Mark Silver
CPC分类号： H01S3/0941 , H01S3/025 , H01S3/0405 , H01S3/0606 , H01S3/061 , H01S3/0617 , H01S3/0625 , H01S3/094084 , H01S3/11 , H01S3/113 , H01S3/1608 , H01S3/1618 , H01S3/17 , H01S5/4025
摘要： A side pumped laser comprises an elongated gain medium (10) provided between an output coupler (20) and a counter reflector (15) and a pump source (65) configured to provide radiation to the gain medium (10) along a side axis of the gain medium, wherein the laser is configured such that radiation from the pump source is directly incident on the gain medium; and the pump source is provided proximate, adjacent or in contact with the gain medium. The laser material and compositions, geometries and dimensions are designed to both maximise laser performance and to permit the use of construction techniques commonplace in the production of equipment designed for optical telecoms systems to facilitate low cost high volume and miniaturisation. The elongated gain medium (10) may have a polygonal cross-section with a non-coated side surface (55) receiving pump light emitted by a laser diode bar (65) while the other, non-emitting surfaces are coated with for example a gold coating (60) for pump light recycling and cooling of the gain medium by heat conduction. The counter reflector (15) may be provided on one facet of a passive Q-switch (30) and the output coupler (20) on a facet (50b) of the gain medium (10).
摘要翻译： 侧泵浦激光器包括设置在输出耦合器（20）和反向反射器（15）之间的细长增益介质（10）和泵源（65），其被构造成沿着侧向轴线的侧轴向增益介质（10）提供辐射 所述增益介质，其中所述激光器被配置为使得来自所述泵浦源的辐射直接入射在所述增益介质上; 并且所述泵浦源被设置为接近，相邻或与所述增益介质接触。 激光材料和组合物，几何形状和尺寸被设计成最大限度地提高激光器性能，并允许在为光通信系统设计的设备的生产中常用的构造技术使用，以便于低成本大容量和小型化。 细长增益介质（10）可以具有多边形横截面，其中未涂覆的侧表面（55）接收由激光二极管棒（65）发射的泵浦光，而另一个非发射表面涂覆有例如 金涂层（60），用于泵光回收和通过热传导冷却增益介质。 反射器（15）可以设置在无源Q开关（30）的一个面上，输出耦合器（20）位于增益介质（10）的小平面（50b）上。
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公开(公告)号：US20150160047A1
公开(公告)日：2015-06-11
申请号：US14563325
申请日：2014-12-08
发明人： JOHN SAVAGE , Jonathan Neil Smith
CPC分类号： G01D11/245 , G01H17/00 , H04R1/406 , H04R3/005
摘要： An acoustic detector provides a planar arrangement of microphones. A windshield is arranged over the microphones, with a view to reducing the impact of environmental effects. A void is therefore defined over the microphones, and the interior surface of the windshield, which defines the void, is shaped suitably to reduce the potential for acoustic waves propagating within the void to reflect back onto the microphones.
摘要翻译： 声学检测器提供麦克风的平面布置。 一个挡风玻璃安置在麦克风之上，以减少环境影响的影响。 因此，在麦克风上定义空隙，并且限定空隙的挡风玻璃的内表面适当地成形以减小在空隙内传播的声波的反射回到麦克风上的可能性。
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