Abstract: A keyword extraction method includes: extracting candidate words from an original document to form a first word set; acquiring a first association degree between each first word thereof and the original document, and determining a second word set according to the first association degree; for each second word in the second word set, inquiring, in a word association topology, at least one node word satisfying a condition of association with the second word and forming a third word set, the word association topology indicating an association relation among multiple node words in a predetermined field; and determining a union set of the second and third word sets, acquiring a second association degree between each candidate keyword in the union set and the original document, and selecting, according to the second association degree, at least one candidate keyword from the union set, to form a keyword set of the original document.

Abstract: Provided are a synchronization method, a wide area system protection apparatus, a plant station and a computer readable storage medium. The method includes: sending to a second plant station a first data frame that includes a sequence number p and a sending timestamp of the first data frame; receiving a second data frame sent by the second plant station, and recording a receiving timestamp of the second data frame, the second data frame including a sequence number q of the second data frame, a sending timestamp of the second data frame and a receiving timestamp of the first data frame, and the first data frame being adjacent to the second frame on the second plant station; calculating a time phase difference and a crystal oscillator frequency deviation between the first plant station and the second plant station; and adjusting time and a clock frequency of the first plant station.

Abstract: Systems and methods are disclosed to manage a microgrid with a hybrid energy storage system (HESS) includes deriving a dynamic model of a bidirectional-power-converter (BPC)-interfaced HESS; applying a first neural network (NN) to estimate a system dynamic; and applying a second NN to calculate an optimal control input for the HESS through online learning based on the estimated system dynamics.

Abstract: Data quality of Phasor Measurement Unit (PMU) is receiving increasing attention as it has been identified as one of the limiting factors that affect many wide-area measurement system (WAMS) based applications. In general, existing PMU calibration methods include offline testing and model based approaches. However, in practice, the effectiveness of both is limited due to the very strong assumptions employed. This invention presents a novel framework for online error detection and calibration of PMU measurement using density-based spatial clustering of applications with noise (DBSCAN) based on much relaxed assumptions. With a new problem formulation, the proposed data mining based methodology is applicable across a wide spectrum of practical conditions and one side-product of it is more accurate transmission line parameters for the energy management system (EMS) database and protective relay settings. Case studies are presented to demonstrate the effectiveness of the proposed method.

Abstract: Provided are a method and apparatus for estimating a meteorology sensitive load power. The method includes: obtaining a meteorology sensitive load power estimation model; inputting a daily load curve of a date to be estimated to the meteorology sensitive load power estimation model and extracting a daily load curve dimension reduction feature of the date to be estimated; and outputting a meteorology sensitive load power based on the daily load curve dimension reduction feature of the date to be estimated and mapping relationships from daily load curve dimension reduction features onto meteorology sensitive load powers. The proposed estimation model can directly obtain the meteorology sensitive load power curve from the daily load curve, and is especially applicable to cases where meteorology data is frequently lost in practical applications.

Abstract: Systems and methods are disclosed to control the power grid frequency by capturing the frequency change using an extended Kalman filter method with the distributed smart outlet devices at the low-voltage distribution level; and locally control the relay that provides power to the appliance by comparing the captured frequency with the threshold sent from the cloud control center.

Abstract: Systems and methods are disclosed for power management by estimating power contingency of a grid at a cloud control center; performing decentralized real-time measurement and making local decisions at one more computer controlled outlets connected to the grid; and aggregating distributed loads to provide emergency frequency support to the grid.

Abstract: The present invention provides network systems and methods for battery management. Battery management can include controlling transmissions to and from wireless devices. Thus, in an embodiment, a system for controlling transmissions in a wireless network is provided. A base station is configured for bidirectional wireless communication with each of a plurality of wireless devices. The base station is configured to receive battery characteristics from at least one of the plurality of wireless devices. The battery characteristics represent at least a battery type for the wireless device. Transmission constraints that correspond to each of a plurality of battery types are stored within a transmission constraints database. The base station is configured to obtain transmission constraints by looking up the battery type in the transmission constraints database.

Abstract: Disclosed are compounds of formula (I) and formula (II): (I) (II) wherein R1, R2, A, and B are as defined herein. Also disclosed is a method of blocking transmission of a Plasmodium parasite and a method of treating or preventing malaria comprising administering to an animal an effective amount of a first compound of formula (I) or (II) either alone or in combination with a second compound selected from elesclomol, NSC174938, NVP-AUY922, Maduramicin, Narasin, Alvespimycin, Omacetaxine, Thiram, Zinc pyrithione, Phanquinone, Bortezomib, Salinomycin sodium, Monensin sodium, Dipyrithione, Dicyclopentamethylene-thiuram disulfide, YM155, Withaferin A, Adriamycin, Romidepsin, AZD-1152-HQPA, CAY10581, Plicamycin, CUDC-101, Auranofin, Trametinib, GSK-458, Afatinib, and Panobinostat.

Abstract: The present application discloses a man-machine identification method and device for a captcha. The method includes: collecting real-time user data when a first user inputs the captcha; and making a prediction for the real-time user data according to a machine learning model to determine an attribute of the first user. The machine learning model is obtained by training a sample data set, the sample data set includes one or more sets of training sample data and a label respectively set for each set of training sample data, and the label represents an attribute of a second user.

Abstract: Physically unclonable function (PUF) memory employing static random access memory (SRAM) bit cells enhanced by stress for increased PUF output reproducibility. Stress voltage applied to SRAM bit cells enhances their skew so that the SRAM bit cells output their preferred initial state in subsequent PUF read operations regardless of process variation and other external environmental variations, such as temperature. The application of stress voltage on the SRAM bit cells in a PUF memory array takes advantage of the recognition of aging effect in transistors, where turning transistors on and off over time can increase threshold voltage resulting in lower drive current. Stress voltage can be applied to the SRAM bit cells to bias their threshold voltage to simulate this aging effect to enhance mismatch between transistors in the SRAM bit cell to more fully skew the SRAM bit cells for increased PUF output reproducibility with less susceptible to noise.

Abstract: Provided is a power grid adjustment method based on a load of a variable frequency air conditioner. The method includes: establishing a mathematical simulation model of a virtual synchronous motor in a variable frequency air conditioner controller; establishing a virtual inertia control segment and a droop control segment of power grid adjustment according to the mathematical simulation model; obtaining a reference value ?? of rotation speed variation of a compressor by the virtual inertia control segment; obtaining a reference value ?ref of rotational angular frequency of the compressor by the droop control segment; and inputting a sum of the reference value ?ref of rotational angular frequency of the compressor and the reference value ?? of rotation speed variation of the compressor into a field-oriented controller (FOC) to control rotation of a motor.

Abstract: Methods to determine fluid filtration rates through mammalian luminal organs. In one method, the method comprises the steps of positioning a segment of a mammalian luminal organ within a device, the device configured to prevent axial flow conditions through a lumen of the segment from a first end of the segment to an opposite second end of the segment, obtaining a first segment measurement at a first time, obtaining a second segment measurement at a second time, and determining a rate of fluid filtration through a wall of the segment based upon a difference between the first segment measurement and the second segment measurement and a difference in time between the first time and the second time.

Abstract: The present invention provides network systems and methods for battery management. Battery management can include controlling transmissions to and from wireless devices. Thus, in an embodiment, a system for controlling transmissions in a wireless network is provided. A base station is configured for bidirectional wireless communication with each of a plurality of wireless devices. The base station is configured to receive battery characteristics from at least one of the plurality of wireless devices. The battery characteristics represent at least a battery type for the wireless device. Transmission constraints that correspond to each of a plurality of battery types are stored within a transmission constraints database. The base station is configured to obtain transmission constraints by looking up the battery type in the transmission constraints database.

Abstract: Apparatuses, systems, and methods associated with spacer elements for maintaining a distance between a substrate and component during reflow are disclosed herein. In embodiments, a substrate assembly may include a substrate and a component. The component may be coupled to the substrate via a solder joint, wherein the solder joint may include a spacer element and solder, the spacer element to maintain a distance between the substrate and the component. Other embodiments may be described and/or claimed.

Abstract: The disclosure of the present application provides devices, systems, and methods for replacing damaged or compromised blood vessels and engineering luminal grafts for various medical applications. Such devices are capable of providing viable, small-diameter grafts for use in anastomotic procedures and comprise a tubular construct consisting largely of elastin and some collagen fibers and having at least one diameter of less than or equal to about 5 mm. In one exemplary embodiment, the graft comprises at least one layer of pulmonary ligament tissue and/or pulmonary visceral pleura. Systems and methods for the manufacture of the graft are also provided, which include the use of at least one layer of tissue, a mandrel and a closure mechanism.

Abstract: A semiconductor device for a one-time programmable (OTP) memory according to some examples of the disclosure includes a gate, a dielectric region below the gate, a source terminal below the dielectric region and offset to one side, a drain terminal below the dielectric region and offset to an opposite side from the source terminal, a drain side charge trap in the dielectric region capable of programming the semiconductor device, and a source side charge trap in the dielectric region opposite the drain side charge trap and capable of programming the semiconductor device.

Abstract: A semiconductor device for a one-time programmable (OTP) memory according to some examples of the disclosure includes a gate, a dielectric region below the gate, a source terminal below the dielectric region and offset to one side, a drain terminal below the dielectric region and offset to an opposite side from the source terminal, a drain side charge trap in the dielectric region capable of programming the semiconductor device, and a source side charge trap in the dielectric region opposite the drain side charge trap and capable of programming the semiconductor device.

Abstract: Systems and method are disclosed for monitor long-term voltage stability in a power system by estimating post-contingency operating point(s) considering PV-PQ transitions based on the current operating point; predicting a sensitivity based Thevenin index (STI) for each contingency using the estimated operating condition; and determining a voltage stability assessment (VSA) considering N?1 contingency.

Abstract: In response to receiving a question, a corpus of textual data having content related to the question is obtained. At least one segment is extracted from the corpus of textual data. At least one question-answer pair is generated from at least one segment. Each question-answer pair comprises a candidate question and an answer corresponding to the candidate question.