公开(公告)号：US10914608B2

公开(公告)日：2021-02-09

申请号：US15653115

申请日：2017-07-18

Applicant: NEC Laboratories America, Inc.

Inventor： Haifeng Chen ,  Kenji Yoshihira ,  Guofei Jiang

IPC: G01D3/08 ,  G06N5/04 ,  G06K9/62 ,  G06F17/18 ,  G06F11/34 ,  G06K9/00 ,  G06F11/30 ,  G06F30/20 ,  G06N20/00 ,  G06N7/08

Abstract: Systems and methods for anomaly detection in complex physical systems, including extracting features representative of a temporal evolution of the complex physical system, and analyzing the extracted features by deriving vector trajectories using sliding window segmentation of time series, applying a linear test to determine whether the vector trajectories are linear, and performing subspace decomposition on the vector trajectory based on the linear test. A system evolution model is generated from an ensemble of models, and a fitness score is determined by analyzing different data properties of the system based on specific data dependency relationships. An alarm is generated if the fitness score exceeds a predetermined number of threshold violations for the different data properties.

公开(公告)号：US10909242B2

公开(公告)日：2021-02-02

申请号：US16169081

申请日：2018-10-24

Applicant: NEC Laboratories America, Inc.

Inventor： Ding Li ,  Xusheng Xiao ,  Zhichun Li ,  Guofei Jiang ,  Peng Gao

IPC: G06F21/55 ,  G06F9/54 ,  G06F16/33 ,  G06F21/57 ,  G06F16/2455

Abstract: A system and method are provided for identifying security risks in a computer system. The system includes an event stream generator configured to collect system event data from the computer system. The system further includes a query device configured to receive query requests that specify parameters of a query. Each query request includes at least one anomaly model. The query request and the anomaly model are included in a first syntax in which a system event is expressed as {subject-operation-object}. The system further includes a detection device configured to receive at least one query request from the query device and continuously compare the system event data to the anomaly models of the query requests to detect a system event that poses a security risk. The system also includes a reporting device configured to generate an alert for system events that pose a security risk detected by the detection device.

公开(公告)号：US20210027019A1

公开(公告)日：2021-01-28

申请号：US16918353

申请日：2020-07-01

Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

Inventor： Yuncong Chen ,  Hao Yuan ,  Dongjin Song ,  Cristian Lumezanu ,  Haifeng Chen ,  Takehiko Mizoguchi

IPC: G06F40/30 ,  G06N3/08 ,  G06K9/62 ,  G06F17/16

Abstract: A system for cross-modal data retrieval is provided that includes a neural network having a time series encoder and text encoder which are jointly trained using an unsupervised training method which is based on a loss function. The loss function jointly evaluates a similarity of feature vectors of training sets of two different modalities of time series and free-form text comments and a compatibility of the time series and the free-form text comments with a word-overlap-based spectral clustering method configured to compute pseudo labels for the unsupervised training method. The computer processing system further includes a database for storing the training sets with feature vectors extracted from encodings of the training sets. The encodings are obtained by encoding a training set of the time series using the time series encoder and encoding a training set of the free-form text comments using the text encoder.

公开(公告)号：US10885627B2

公开(公告)日：2021-01-05

申请号：US16371552

申请日：2019-04-01

Applicant: NEC Laboratories America, Inc.

Inventor： Renqiang Min ,  Farley Lai ,  Eric Cosatto ,  Hans Peter Graf

IPC: G06K9/00 ,  G06T7/00 ,  G06F16/56 ,  G06N3/08

Abstract: Methods and systems for detecting and correcting anomalous inputs include training a neural network to embed high-dimensional input data into a low-dimensional space with an embedding that preserves neighbor relationships. Input data items are embedded into the low-dimensional space to form respective low-dimensional codes. An anomaly is determined among the high-dimensional input data based on the low-dimensional codes. The anomaly is corrected.

公开(公告)号：US20200319017A1

公开(公告)日：2020-10-08

申请号：US16838105

申请日：2020-04-02

Applicant: NEC Laboratories America, Inc.

Inventor： Yue TIAN

IPC: G01H9/00 ,  G02B6/44

Abstract: Aspects of the present disclosure describe aerial fiber optical cable localization using distributed acoustic sensing (DAS) that advantageously may determine the locality of electrical transformers affixed to utility poles along with the aerial fiber optical cable as well as any length(s) of fiber optical cable between the poles. Further aspects employ survey manned or unmanned, aerial or terrestrial survey vehicles that acoustically excite locations along the fiber optical cable and associate those DAS excitations with global positioning location (GPS).

公开(公告)号：US20190393965A1

公开(公告)日：2019-12-26

申请号：US16449319

申请日：2019-06-21

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang ZHANG ,  Fatih YAMAN ,  Eduardo RODRIGUEZ ,  Yoshihisa INADA ,  Kohei NAKAMURA ,  Takanori INOUE

IPC: H04B10/61 ,  H04B10/2543 ,  G06K9/62 ,  H04L27/20 ,  G06N3/08 ,  H04B10/2531 ,  H04L27/26

Abstract: Aspects of the present disclosure describe systems, methods and structures for optical fiber nonlinearity compensation using neural networks that advantageously employ machine learning (ML) algorithms for nonlinearity compensation (NLC) that advantageously provide a system-agnostic model independent of link parameters, and yet still achieve a similar or better performance at a lower complexity as compared with prior-art methods. Systems, methods, and structures according to aspects of the present disclosure include a data-driven model using the neural network (NN) to predict received signal nonlinearity without prior knowledge of the link parameters. Operationally, the NN is provided with intra-channel cross-phase modulation (IXPM) and intra-channel four-wave mixing (IFWM) triplets that advantageously provide a more direct pathway to underlying nonlinear interactions.

公开(公告)号：US20190036602A1

公开(公告)日：2019-01-31

申请号：US16048155

申请日：2018-07-27

Applicant: NEC Laboratories America, Inc.

Inventor： Giovanni MILIONE

IPC: H04B10/11 ,  H04J14/04 ,  H04B10/516

CPC classification number: H04B10/11 ,  H04B10/112 ,  H04B10/516 ,  H04J14/04

Abstract: Aspects of the present disclosure describe systems, methods, and structures for free-space optical communications using Hermite-Gaussian modes resulting in advantageous performance over prior art systems particularly with respect to lateral misalignment.

公开(公告)号：US20180307877A1

公开(公告)日：2018-10-25

申请号：US15954083

申请日：2018-04-16

Applicant: NEC Laboratories America, Inc.

Inventor： Karthikeyan Sundaresan ,  Eugene Chai ,  Sampath Rangarajan

IPC: G06K7/10 ,  G06Q20/18

CPC classification number: G06K7/10366 ,  G06K7/10009 ,  G06K7/10356 ,  G06Q20/18 ,  G07G1/0081 ,  G07G1/009

Abstract: Systems and a method are provided for use with a shopping cart in a store. A system includes Radio-Frequency Identification (RFID) tags, including item RFID tags associated with items for sale and reference RFID tags associated with various aisles in the store, for providing RFID data. The system further includes a RFID reader, operatively coupled to the shopping cart, and configured to the read RFID data from the item RFID tags and the reference RFID tags, extract features from the RFID data, identify any of the items having feature values associated therewith greater than a threshold amount as inside-cart items to be processed during an automatic checkout, and perform the automatic checkout on only the inside-cart items.

公开(公告)号：US20180269979A1

公开(公告)日：2018-09-20

申请号：US15912852

申请日：2018-03-06

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang ZHANG ,  Fatih YAMAN ,  Eduardo Mateo RODRIGUEZ ,  Yoshihisa INADA

IPC: H04B10/516 ,  H04L27/36 ,  H04L27/34 ,  H04B10/58 ,  H04B10/2543 ,  H04B10/27 ,  H04L1/00 ,  H03M13/11

CPC classification number: H04B10/5161 ,  H03M13/1102 ,  H03M13/255 ,  H04B10/2543 ,  H04B10/27 ,  H04B10/516 ,  H04B10/541 ,  H04B10/58 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/3405 ,  H04L27/366

Abstract: Aspects of the present disclosure describe methods of generating an optimized set of constellation symbols for an optical transmission network wherein the optimized constellation is based on GMI cost and considers both fiber nonlinearity and linear transmission noise.

公开(公告)号：US20160147832A1

公开(公告)日：2016-05-26

申请号：US14321881

申请日：2014-07-02

Applicant: NEC Laboratories America, Inc.

Inventor： Jagan Sankaranarayanan ,  Vahit Hacigumus ,  Jeffrey LeFevre ,  Junichi Tatemura

IPC: G06F17/30

CPC classification number: G06F17/30457 ,  G06F17/30339 ,  G06F17/30383 ,  G06F17/30598

Abstract: A system includes first and second data stores, each store having a set of materialized views of the base data and the views comprise a multistore physical design; an execution layer coupled to the data stores; a query optimizer coupled to the execution layer; and a tuner coupled to the query optimizer and the execution layer, wherein the tuner determines a placement of the materialized views across the stores to improve workload performance upon considering each store's view storage budget and a transfer budget when moving views across the stores.

Abstract translation: 系统包括第一和第二数据存储，每个存储具有一组基本数据的物化视图，并且视图包括多存储物理设计; 耦合到数据存储的执行层; 耦合到执行层的查询优化器; 以及耦合到所述查询优化器和所述执行层的调谐器，其中，所述调谐器在跨所述商店移动视图时，在考虑每个商店的视图存储预算和转移预算时，确定跨所述商店的物化视图的放置以改善工作负载性能。