中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

263 records (took 0.036 seconds)

    Deep ocean long range underwater navigation algorithm (UNA) for determining the geographic position of underwater vehicles
    63.
    发明授权
    Deep ocean long range underwater navigation algorithm (UNA) for determining the geographic position of underwater vehicles 有权

    公开(公告)号：US10955523B1

    公开(公告)日：2021-03-23

    申请号：US15804695

    申请日：2017-11-06

    Applicant: Leidos, Inc.

    Inventor： Peter N. Mikhalevsky

    IPC: G01S5/22 ,  G06F30/20

    Abstract: An underwater navigation algorithm (UNA) uses acoustic signals transmitted in the ocean from sources at known positions to compute a position underwater for a vehicle that requires no initial a priori position or any ocean sound speed information or any initial GPS position that would require surfacing. The UNA consists of two parts, (1) the Cold Start Algorithm (CSA) and (2) the CSA with Modeling (CSAM). The underwater vehicle needs to be equipped with only a single hydrophone acoustic receiver and an onboard processor. The CSA requires only measuring the travel time of the end of the arrival coda (EOC) from each of the sources to compute a position. The CSAM is a post CSA procedure to calculate a higher accuracy position using the CSA position. CSAM utilizes the CSA position and a 4D sound speed field derived from an ocean 4D General Circulation Model (GCM) constrained using Ocean Acoustic Tomography (OAT) in the ocean area of operation and further includes (1) computing a modeled result with an acoustic propagation modeling code that is compared with the received acoustic data using a known procedure called “bulk shifting” and/or (2) a new proposed procedure that uses calculated group speeds from the 4D sound speed field, to provide a higher accuracy estimate of the receiver position.

    Contact imaging sensor head for computed radiography
    66.
    发明授权
    Contact imaging sensor head for computed radiography 有权

    公开(公告)号：US10458931B1

    公开(公告)日：2019-10-29

    申请号：US15622939

    申请日：2017-06-14

    Applicant: Leidos, Inc.

    Inventor： Rex David Richardson ,  William L. Hicks ,  Mark Alan Peressini

    IPC: G01N23/22

    Abstract: A scan head design uses 1:1 (one-to-one) imaging micro-lens arrays to transfer the object plane X-ray image from a CR-plate onto a linear photosensor. The scan-head includes a housing having therein, an array of red light emitting diodes (LEDs), a red-absorbing filter, a microlens array, an infrared-filter, and a sensor. The housing faces the CR-plate and the scan-head is translated across the CR-plate to read out the X-ray image therein. The scan head is compact and provides for improved spatial resolution and reduced power requirements.

    Method and system for multiple carrier resource allocation in LTE-advanced networks
    69.
    发明授权
    Method and system for multiple carrier resource allocation in LTE-advanced networks 有权

    公开(公告)号：US10104581B2

    公开(公告)日：2018-10-16

    申请号：US15854113

    申请日：2017-12-26

    Applicant: Leidos, Inc.

    Inventor： Rebecca K. Harrington

    IPC: H04M11/00 ,  H04W28/24 ,  H04W4/00 ,  H04M15/00 ,  H04W4/24

    Abstract: A process for selecting an optimal individual user solution including an optimal rate allocation and associated price for a predetermined bandwidth of cellular network resources includes application of an iterative process and selection from multiple proposed user solutions. The inputs to the iterative process include at least an initial user bid, an initial network rate allocation, a generated user utility function and the cost data. The user utility function includes multiple application user functions. Optimal solution selection includes comparing each multiple proposed user rate allocation with the initial network rate allocation for the user and selecting the closest multiple proposed user rate allocation to the initial network rate allocation. The process may be applied to aggregated cellular carrier scenarios.

Patent Agency Ranking