公开(公告)号：US20230376773A1

公开(公告)日：2023-11-23

申请号：US18362125

申请日：2023-07-31

Applicant: NEC Laboratories America, Inc.

Inventor： Wenchao Yu ,  Haifeng Chen

IPC: G06N3/084 ,  G06N5/046 ,  G06N3/045 ,  G06N20/20 ,  G16H50/30

CPC classification number: G06N3/084 ,  G06N5/046 ,  G06N3/045 ,  G06N20/20 ,  G16H50/30

Abstract: Methods and systems for responding to changing conditions include training a model, using a processor, using trajectories that resulted in a positive outcome and trajectories that resulted in a negative outcome. Training is performed using an adversarial discriminator to train the model to generate trajectories that are similar to historical trajectories that resulted in a positive outcome, and using a cooperative discriminator to train the model to generate trajectories that are dissimilar to historical trajectories that resulted in a negative outcome. A dynamic response regime is generated using the trained model and environment information. A response to changing environment conditions is performed in accordance with the dynamic response regime.

公开(公告)号：US11783189B2

公开(公告)日：2023-10-10

申请号：US16998228

申请日：2020-08-20

Applicant: NEC Laboratories America, Inc.

Inventor： Wenchao Yu ,  Haifeng Chen

IPC: G06N3/08 ,  G06N3/084 ,  G16H50/30 ,  G06N20/20 ,  G06N5/046 ,  G06N3/045

CPC classification number: G06N3/084 ,  G06N3/045 ,  G06N5/046 ,  G06N20/20 ,  G16H50/30

Abstract: Methods and systems for responding to changing conditions include training a model, using a processor, using trajectories that resulted in a positive outcome and trajectories that resulted in a negative outcome. Training is performed using an adversarial discriminator to train the model to generate trajectories that are similar to historical trajectories that resulted in a positive outcome, and using a cooperative discriminator to train the model to generate trajectories that are dissimilar to historical trajectories that resulted in a negative outcome. A dynamic response regime is generated using the trained model and environment information. A response to changing environment conditions is performed in accordance with the dynamic response regime.

公开(公告)号：US11782812B2

公开(公告)日：2023-10-10

申请号：US17491632

申请日：2021-10-01

Applicant: NEC Laboratories America, Inc.

Inventor： Yuncong Chen ,  Zhengzhang Chen ,  Cristian Lumezanu ,  Masanao Natsumeda ,  Xiao Yu ,  Wei Cheng ,  Takehiko Mizoguchi ,  Haifeng Chen

IPC: G06F11/34 ,  G06N3/08 ,  G06N3/045

CPC classification number: G06F11/3476 ,  G06N3/045 ,  G06N3/08

Abstract: A method for system metric prediction and influential events identification by concurrently employing metric logs and event logs is presented. The method includes concurrently modeling multivariate metric series and individual events in event series by a multi-stream recurrent neural network (RNN) to improve prediction of future metrics, where the multi-stream RNN includes a series of RNNs, one RNN for each metric and one RNN for each event sequence and modeling causality relations between the multivariate metric series and the individual events in the event series by employing an attention mechanism to identify target events most responsible for fluctuations of one or more target metrics.

公开(公告)号：US11754612B2

公开(公告)日：2023-09-12

申请号：US17719322

申请日：2022-04-12

Applicant: NEC Laboratories America, Inc.

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

IPC: G01R31/08 ,  G01H9/00

CPC classification number: G01R31/085 ,  G01H9/004

Abstract: Distributed fiber optic sensing (DFOS) systems and methods for monitoring electrical power distribution transformers and locating failing/failed/malfunctioning transformers from humming signals indicative of a transformer's operational integrity and are advantageously detected/analyzed via DFOS mechanisms.

公开(公告)号：US20230281826A1

公开(公告)日：2023-09-07

申请号：US18178821

申请日：2023-03-06

Applicant: NEC Laboratories America, Inc.

Inventor： Samuel Schulter

IPC: G06T7/12 ,  G06T1/00 ,  G06V10/25 ,  G06V10/74

CPC classification number: G06T7/12 ,  G06T1/0021 ,  G06V10/25 ,  G06V10/761 ,  G06V2201/07 ,  G06T2207/20081

Abstract: Methods and systems for training an image segmentation model include embedding training images, from multiple training datasets having differing label spaces, in a joint latent space to generate first features. Textual labels of the training images are embedded in the joint latent space to generate second features. A segmentation model is trained using the first features and the second features.

公开(公告)号：US11743744B2

公开(公告)日：2023-08-29

申请号：US17317123

申请日：2021-05-11

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Shahram Shahsavari

IPC: H04L43/12 ,  H04W16/28 ,  H04W24/08

CPC classification number: H04W16/28 ,  H04L43/12 ,  H04W24/08

Abstract: A computer-implemented method is provided for finding a data transmission beam from an Access Point (AP) to a User Equipment (UE) in a communication system. The method includes selecting a probing beam from a set of probing beams. The method further includes sending a plurality of probing packets from the AP to the UE using a dedicated probing beam selected for each probing packet from among the set of probing beams. The method also includes receiving feedback from the UE regarding the plurality of probing packets. The method additionally includes computing the data transmission beam based on the received feedback and the set of probing beams.

公开(公告)号：US11742939B2

公开(公告)日：2023-08-29

申请号：US17496722

申请日：2021-10-07

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Ji ,  Ting Wang ,  Zilong Ye

IPC: H04B10/032

CPC classification number: H04B10/032

Abstract: Aspects of the present disclosure describe distributed fiber optic sensor systems, methods, and structures that advantageously enable/provide for the proper placement/assignment of sensors in the DFOS network to provide for high reliability, fault tolerant operation that survives fiber failures.

公开(公告)号：US11741220B2

公开(公告)日：2023-08-29

申请号：US17398514

申请日：2021-08-10

Applicant: NEC Laboratories America, Inc.

Inventor： Xiao Yu ,  Haifeng Chen ,  Fei Zuo

IPC: G06F21/52 ,  G06F16/2458 ,  G06N5/022 ,  G06F21/55 ,  G06F9/54

CPC classification number: G06F21/52 ,  G06F9/547 ,  G06F16/2465 ,  G06F21/55 ,  G06N5/022 ,  G06F2221/033

Abstract: A computer-implemented method is provided for computer intrusion detection. The method includes establishing a mapping from low-level system calls to user functions in computer programs. The user functions run in a user space of an operating system. The method further includes identifying, using a search algorithm inputting the mapping and a system-call trace captured at runtime, any of the user functions that trigger the low-level system calls in the system-call trace. The method further includes performing, by a processor device, intrusion detection responsive to a provenance graph with program contexts. The provenance graph has nodes formed from the user functions that trigger the low-level system calls in the system-call trace. Edges in the provenance graph have edge labels describing high-level system operations for low-level system call to high-level system operation correlation-based intrusion detection.

公开(公告)号：US11741146B2

公开(公告)日：2023-08-29

申请号：US17370498

申请日：2021-07-08

Applicant: NEC Laboratories America, Inc.

Inventor： Yuncong Chen ,  Dongjin Song ,  Cristian Lumezanu ,  Haifeng Chen ,  Takehiko Mizoguchi ,  Xuchao Zhang

IPC: G06F16/35 ,  G06K9/62 ,  G06F40/169 ,  G06N3/08 ,  G06F18/23 ,  G06F18/214 ,  G06V10/77 ,  G06V10/82 ,  G06V10/62

CPC classification number: G06F16/355 ,  G06F18/2155 ,  G06F18/23 ,  G06F40/169 ,  G06N3/08 ,  G06V10/62 ,  G06V10/7715 ,  G06V10/82

Abstract: Methods and systems of training and using a neural network model include training a time series embedding model and a text embedding model with unsupervised clustering to translate time series and text, respectively, to a shared latent space. The time series embedding model and the text embedding model are further trained using semi-supervised clustering that samples training data pairs of time series information and associated text for annotation.

公开(公告)号：US20230269019A1

公开(公告)日：2023-08-24

申请号：US18109247

申请日：2023-02-13

Applicant: NEC Laboratories America, Inc.

Inventor： Yue-Kai HUANG ,  Ezra IP

IPC: H04J14/02

CPC classification number: H04J14/0212

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously provide DFOS and WDM communications over amplified, multi-span optical WDM optical telecommunications facilities using all Raman amplification and coding schemes. Our all-Raman amplification operates stably—without isolators—and provides sufficient gain to compensate for fiber span loss for both DFOS signals and WDM channel signals—at the same time. Furthermore, our inventive techniques employ signal coding, such as MB-TGD-OFDR for DAS, and we operate our DFOS operation power at a much lower power level as compared to pulse interrogation techniques. With improved OSNR and reduced power using signal coding along with our distributed Raman amplification, our DFOS systems can co-exist with WDM communication channels on the same amplified multi-span fiber optic links over great distances.