公开(公告)号：US11441890B2

公开(公告)日：2022-09-13

申请号：US17026139

申请日：2020-09-18

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Sampath Rangarajan

IPC: G01B11/00 ,  G01B11/14 ,  G01S5/02

Abstract: Aspects of the present disclosure describe systems, methods and structures that perform linear-grammetry and calibration by simultaneous multilateration using only edge distance estimates via two-way ranging.

公开(公告)号：US20220283001A1

公开(公告)日：2022-09-08

申请号：US17684348

申请日：2022-03-01

Applicant: NEC LABORATORIES AMERICA, INC

Inventor： Yangmin DING ,  Sarper OZHARAR ,  Yue TIAN ,  Ting WANG ,  Yuanda XU

IPC: G01D5/353 ,  G01H9/00

Abstract: Distributed fiber optic sensing (DFOS)/distributed acoustic sensing (DAS) techniques coupled with frequency domain decomposition (FDD) are employed to determine the presence of 120 HZ operating power frequency to determine when street lights are energized and on thereby providing continuous status monitoring of the operational status of street lights and locating affected street lights at a particular utility pole location.

公开(公告)号：US20220279287A1

公开(公告)日：2022-09-01

申请号：US17579516

申请日：2022-01-19

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang HU ,  Ting WANG

IPC: H04R23/00 ,  G01H9/00 ,  H04R3/00 ,  H04R1/08 ,  H03G3/30

Abstract: Aspects of the present disclosure describe DFOS/DAS systems, methods, and structures that employ active microphones to enhance DAS operational capabilities by using an active circuit to amplify acoustic signals including voice(s). The circuit includes a microphone to collect acoustic signal(s) resulting from voice signals in the environment, and a speaker or a vibration device driven by an amplifier. The circuit can be clipped onto the fiber, with direct contact through the speaker or vibration device. A microcontroller may advantageously be employed to control the circuit for reduced power consumption, by detecting activities locally and only enabling the speaker when needed. The microcontroller may also send other information such as battery status to the DFOS interrogator through vibration codes.

公开(公告)号：US20220277197A1

公开(公告)日：2022-09-01

申请号：US17674461

申请日：2022-02-17

Applicant: NEC Laboratories America, Inc.

Inventor： Christopher Malon

IPC: G06N3/08 ,  G06F40/279 ,  G06F40/166 ,  G06F40/242

Abstract: Methods and systems for language processing include augmenting an original training dataset to produce an augmented dataset that includes a first example that includes a first scrambled replacement for a first word and a definition of the first word, and a second example that includes a second scrambled replacement for the first word and a definition of an alternative to the first word. A neural network classifier is trained using the augmented dataset.

公开(公告)号：US11423436B2

公开(公告)日：2022-08-23

申请号：US16787657

申请日：2020-02-11

Applicant: NEC Laboratories America, Inc.

Inventor： Wei Cheng ,  Haifeng Chen

IPC: G06Q30/02 ,  G06N5/02 ,  G06N20/00

Abstract: A system is provided for interpretable viewing interest. A transformer with multi-head self-attention derives different hierarchical orders of input features. Hierarchical attention layers (i) aggregate the different hierarchical orders to obtain aggregated single-order feature representations and (iii) derive aggregation attention weights for the different hierarchical orders based on an applied order of the hierarchical attention layers. An attentional scoring layer evaluates the aggregated representations to output a significance of each order with respect to various CTR predictions. A hierarchical interpretation layer determines a respective importance of each input feature in various combinations from which the various CTR predictions are derived based on the aggregation attention weights and the significance of each order. A display device displays each of the various combinations for the various CTR predictions along with the respective importance of each of the constituent one of the input features in the various input feature combinations.

公开(公告)号：US11422146B2

公开(公告)日：2022-08-23

申请号：US17221805

申请日：2021-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Ting Wang

IPC: G01P5/00

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously measure wind speed at utility poles that support fiber optic cables and—in many applications—electrical and/or other communications cables (i.e., cable television).

公开(公告)号：US20220237884A1

公开(公告)日：2022-07-28

申请号：US17586284

申请日：2022-01-27

Applicant: NEC Laboratories America, Inc.

Inventor： Asim Kadav ,  Farley Lai ,  Hans Peter Graf ,  Yi Huang

IPC: G06V10/26 ,  G06T7/246 ,  G06V40/10 ,  G06V10/44 ,  G06V10/82 ,  G06V20/58 ,  G08G1/16

Abstract: A computer-implemented method is provided for action localization. The method includes converting one or more video frames into person keypoints and object keypoints. The method further includes embedding position, timestamp, instance, and type information with the person keypoints and object keypoints to obtain keypoint embeddings. The method also includes predicting, by a hierarchical transformer encoder using the keypoint embeddings, human actions and bounding box information of when and where the human actions occur in the one or more video frames.

公开(公告)号：US20220236105A1

公开(公告)日：2022-07-28

申请号：US17583168

申请日：2022-01-24

Applicant: NEC Laboratories America, Inc.

Inventor： Sarper Ozharar ,  Yue Tian ,  Ting Wang ,  Yangmin Ding

IPC: G01H9/00 ,  G01D5/353

Abstract: An advance in the art is made according to aspects of the present disclosure directed to the detection and localization of a substantially static weight situated on aerial telecommunications fiber optic cable through the effect of phase-distributed acoustic sensing (ϕ-DAS) and signal analysis of ambient data. In sharp contrast to the prior art, our inventive method does not require a special optical fiber arrangement or type of fiber nor is it susceptible to range limitations that plague the prior art.

公开(公告)号：US11387898B2

公开(公告)日：2022-07-12

申请号：US17035551

申请日：2020-09-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Ming-Fang Huang ,  Yaowen Li ,  Philip Ji

IPC: H04B10/079 ,  G01D5/353

Abstract: Aspects of the present disclosure describe optical fiber sensing systems, methods and structures disclosing a distributed optical fiber sensor network constructed on a switched optical fiber telecommunications infrastructure to detect temperatures, acoustic effects, and vehicle traffic—among others—demonstrated with a number of different network topologies.

公开(公告)号：US11366231B2

公开(公告)日：2022-06-21

申请号：US16660699

申请日：2019-10-22

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Yuheng Chen ,  Ting Wang

IPC: G01S19/03 ,  G01H9/00

Abstract: Aspects of the present disclosure describe systems, methods and structures for determining any location on a deployed fiber cable from an optical time domain reflectometry (OTDR) curve using a movable mechanical vibration source to stimulate tiny vibration of fiber in deployed fiber cable along the cable route and a fiber sensing system at a central office to detect the vibration(s). Latitude and longitude of the location(s) of the vibration source is measured with a GPS device and a dynamic-OTDR distance is measured at central office (CO) simultaneously. The collected GPS location data and corresponding dynamic-OTDR distance data are paired and saved into a database. This saved data may be processed to graphically overlie a map thereby providing exact cable location on the map thereby providing carriers/service providers the ability to improve fiber fault location on a deployed fiber cable much faster and more accurately than presently possible using methods available in the art.