Abstract: The present invention relates to a method of assessing dynamic flexibility for a virtual power plant, which belongs to the technical field of operating and controlling a power system. The method equals a virtual power plant to an equivalent energy storage device and an equivalent generator and decouples a network constraint condition between the two types of devices through a Robust optimization method. Subsequently, by using a two-stage Robust optimization algorithm, parameters of the equivalent energy storage device and the equivalent generator are calculated and finally accurate depiction is realized on adjusting ability of a distributed resource, so as to provide a scientific decision basis for the virtual power plant to participate in grid control, such that it has a great value in an actual application.

Abstract: An online voltage control method for coordinating multi-type reactive power resources is provided. First, a linearized power flow equation of branch reactive power is established, and an online voltage control model of multi-type reactive power resources including an objective function and constraint conditions is constructed. The constraint conditions includes generator reactive power constraints, reactive power compensator constraints, transformer tap position constraints, a nodal reactive power balance constraint, and slack contained nodal voltage constraints. Then, an optimization result of voltage control is obtained by solving the model.

Abstract: A memristor and a preparation method thereof are provided. The memristor includes at least one memristive unit, each of the at least one memristive unit includes a transistor and at least one memristive component, the transistor includes a source electrode and a drain electrode; and each of the at least one memristive component includes a first electrode, a resistive layer, a second electrode, and a passivation layer, the first electrode is electrically connected with the source electrode or the drain electrode; the resistive layer is provided between the first electrode and the second electrode; and the passivation layer at least covers a sidewall of the resistive layer.

Abstract: A method for predicting snowmelt flood is provided. The method includes: acquiring rain and snow fall distribution data in a target area in a preset time period, and extracting precipitation characteristic data according to the rain and snow fall distribution data; acquiring temperature distribution data in the target area, acquiring a target temperature and a corresponding target time according to the temperature distribution data, and determining temperature characteristic data according to the target temperature and the target time; and determining a snowmelt flood risk level in the target area according to the precipitation characteristic data and the temperature characteristic data.

Abstract: The embodiments provide a method of augmenting environmental scenes and an autonomous vehicle testing system.

Abstract: A semantic-based method and apparatus for retrieving a perspective image, an electronic device and a computer-readable storage medium are provided. An method includes obtaining a perspective image for a space containing an inspected object therein. A semantic division on the perspective image is performed using a first method, to obtain a plurality of semantic region units. A feature extraction network is constructed using a second method. Based on the perspective image and each of the plurality of semantic region units, a feature of each semantic region unit is extracted using the feature extraction network. Based on the feature of each semantic region unit, an image most similar to the semantic region unit is retrieved from an image feature database, to assist in determining an inspected object in the semantic region unit.

Abstract: A method and an apparatus for updating a programmable data plane at runtime are provided. The method includes: splitting, based on distributed on-demand parsers of the data plane, a parsing graph into parsing sub-graphs, and distributing each parsing sub-graph to a respective physical stage in a virtual pipeline of the data plane; adjusting, based on template-based processors and the virtual pipeline, an order between any two template-based processors by configuring an interconnection network; disaggregating and pooling, based on a decoupled resource pool of the data plane, flow table resources of each physical stage, and updating a flow table at runtime; and suspending, based on a fast update controller of the data plane, packet processing prior to a to-be-updated template-based processor, and configuring or deleting the template-based processor from the pipeline when the template-based processor has no packet.

Abstract: A method for determining an academic impact, including: pre-processing a citing paper to obtain pre-processed data; determining a category of an impact, on the citing paper, of each reference paper and ranking of contribution, to the citing paper, of each reference paper, according to the pre-processed data; determining a local influential factor, on the citing paper, of each reference paper, according to the category of the impact and the ranking of the contribution of each reference paper; and determining a global influential factor of each reference paper according to a global influential factor of the citing paper and the local influential factor.

Abstract: The present disclosure provides a method for optimizing transformation of automation equipment in a power distribution network based on reliability, including determining installation states of respective components in the power distribution network and operation criterions for fault isolation, load transfer and fault recovery after a fault occurred in a feeder segment; determining a target function which is a target function for minimizing a total transformation cost of the power distribution network; determining constraint conditions including reliability constraints; establishing an optimization model for evaluating the reliability of the power distribution network based on the reliability constraints in accordance with the target function and the constraints; and solving the established optimization model for evaluating the reliability of the power distribution network based on the reliability constraints to obtain optimal solutions as optimization results of the automation transformation state of the cir

Abstract: Provided are a method for preparing a microfluidic device, a microfluidic device and a microfluidic system. The method includes: providing a mold having a groove; injecting a liquid metal into the groove of the mold, and solidifying the liquid metal to obtain a solid metal; separating the solid metal from the mold; providing the solid metal with an electrode; providing a cladding layer on a surface of the solid metal provided with the electrode, such that the solid metal is wrapped by the cladding layer, and at least a part of the electrode extends outside the cladding layer, so as to obtain a preform; and fixing the preform in a substrate, melting the solid metal and extending at least a part of the electrode outside the substrate, to obtain the microfluidic device.

Abstract: A reverse-jet swirl pulverized coal burner with multi-stage recirculations includes a pre-combustion housing, a primary coal-air structure, a rich-lean output structure, an inner secondary air structure, and an outer secondary air structure. The pre-combustion housing has a pre-combustion chamber and a housing outlet. The primary coal-air structure is configured to separate a primary coal-air flow into a fuel-rich coal-air flow and a fuel-lean coal-air flow. The rich-lean output structure is configured to output the fuel-lean coal-air flow and block the fuel-rich coal-air flow to make the fuel-rich coal-air flow reversely flow to the pre-combustion chamber. The inner secondary air structure is configured to introduce an inner secondary air into the pre-combustion chamber, thereby forming a first-stage recirculation zone in the pre-combustion chamber and forming a second-stage recirculation zone. The outer secondary air structure is configured to form a third-stage recirculation zone at the housing outlet.

Abstract: Methods of sequencing and producing nucleic acid sequences are provided. Accordingly there are provided methods of sequencing a nucleic acid sequence comprising L-nucleotides comprising subjecting the nucleic acid sequence comprising the L-nucleotides to a chemical sequencing method. Also provided is a method of reverse transcribing a ribose nucleic acid sequence into a deoxyribose nucleic acid sequence comprising catalyzing reverse transcription of the ribose nucleic acid sequence with a Sulfolobus solfataricus P2 DNA polymerase IV (Dpo4).

Abstract: The invention relates to a method, a device and a system for monitoring the IGBT junction temperature, wherein the linear relationship between each turn-off DC bus ringing peak voltage and the corresponding turn-off IGBT junction temperature, the phase current directions, and the initial and secondary states of the half-bridge arms are used to accurately determine the monitoring time of the turn-off DC bus ringing peak voltage, thereby obtaining the IGBT junction temperature at a converter level with higher sensitivity. The IGBT junction temperature obtained using the junction temperature monitoring method provided by the invention is an appropriate converter-level parameter, which has a good application prospect in multi-IGBT junction temperature estimation.

Abstract: A method for detecting a traffic anomaly of Internet of Things (IoT) device based on automata. The method includes: collecting normal traffic of an IoT device to be monitored in each working state, and deriving normal traffic traces; generating flow trees by assembling each flow in the normal traffic traces, and generating joint flow trees by merging the flow trees; and converting a data structure representing the flow in the joint flow trees into automata models after performing reduction processing on the flow in the joint flow trees.

Abstract: Disclosed are a method and an apparatus for implementing privacy amplification in quantum key distribution. Participants of the quantum key distribution include a first participant and a second participant, which share a first key pool including at least one key. The method is executed on a terminal of either of the first and second participants, and includes: acquiring an auxiliary string to be used in current privacy amplification processing, wherein the auxiliary string is determined based on a seed key determined from the first key pool and a first Hash function agreed with the other participant; acquiring, in a stream way, at least one first bit in a first key subjected to information reconciliation; and performing a preset inter-bit operation between the at least one first bit and bits at corresponding positions in the auxiliary string to obtain at least one second bit for forming a privacy-amplified second key.

Abstract: An interaction method triggered by a mouth-covering gesture and an intelligent electronic device are provided. The interaction method is applied to an intelligent electronic device arranged with a sensor. The intelligent electronic device includes a sensor system for capturing a signal of a user putting one hand on a mouth to make a mouth-covering gesture. The interaction method includes: processing the signal to determine whether the user puts the hand on the mouth to make the mouth-covering gesture; and in a case that the user puts the hand on the mouth to make the mouth-covering gesture, determining a mouth-covering gesture input mode as an input mode for controlling an interaction to trigger a control command or trigger another input mode, by executing a program on the intelligent electronic device.

Abstract: A carbon nanotube composite structure includes a carbon nanotube and a film-like structure. The carbon nanotube includes a p-type portion and an n-type portion. The film-like structure is a molybdenum disulfide film or a tungsten disulfide film, and the film-like structure covers the n-type portion.

Abstract: A piperidine derivative, and a pharmaceutical composition thereof, a preparation method therefor, and a use thereof. A compound of the piperidine derivative is as shown in formula (I), and definitions of substituents are detailed in the description. The piperidine derivative can be used as a bifunctional selective ligand for a ?(mu)-opioid peptide receptor (MOPR) and a ?(kappa)-opioid peptide receptor (KOPR), or a bifunctional selective ligand for a MOPR and a nociceptin opioid peptide receptor (NOPR)/opioid receptor like-1 (ORL-1) receptor. Such a compound or a pharmaceutical composition thereof can be used for treating pain, anxiety, depression, alcohol addiction, and substance abuse/dependence.

Abstract: Provided are a method and an apparatus for enhancing the security of a quantum key distribution network. The quantum key distribution network includes a first node, a second node, and at least one relay node, by means of which the first node and the second node implement a first stage of quantum key distribution; the first node and the second node share a first key pool, which includes at least one key; and the method is executed on either the first node or the second node. The method includes: acquiring a first key obtained after the first stage of quantum key distribution; determining the seed key from the first key pool; generating a first random string by applying, based on the seed key, a first algorithm predetermined with a correspondent node, the first random string having a length equal to that of the first key; and acquiring a second key by performing a preset first bit operation on the first key and the first random string.

Abstract: A computing-in-memory array, chip and electronic device includes a computing-in-memory array including at least one computing-in-memory cell having a first switch, a second switch, a third switch, a fourth switch, a coupling capacitor, a first bitline, a second bitline, a third bitline, a first wordline, a second wordline and a third wordline; a control module connected to the computing-in-memory array, which controls the voltages of each wordline and bitline to read and write data through the computing-in-memory array, or to perform computing-in-memory operations. By arranging the first switch, the second switch, the third switch, and the fourth switch in a differential form, and determining the stored value by the difference of the voltage between the two ports of the second switch and the third switch, the present embodiment of the disclosure can implement computing-in-memory operations with high accuracy, low circuit complexity, high reliability, and high energy efficiency.