512 results about "Stream control" patented technology

The invention discloses a data encryption method for multilevel key stream control in an industrial gateway, and particularly relates to the technical field of data encryption and network security. The method comprises the steps of obtaining a session identification code and communication context information; generating a first-level basic key based on the session identification code, and generating a multi-level key stream control matrix in combination with communication context information and a multi-source dynamic random factor; according to the hierarchical relationship of the matrix, key stream sequences of corresponding levels are distributed to data packets of different priorities, and the key stream sequences are switched or combined in real time according to data packet types, transmission paths and security policies in the encryption process, and time fragmentation processing and disturbance coding are executed; the encrypted data packet is sent through a multi-protocol forwarding module of the industrial gateway, and the receiving end carries out decryption by using the key stream control matrix; according to the invention, dynamic generation, hierarchical calling and safe switching of the key stream can be realized, and the data confidentiality, integrity and anti-attack capability of the industrial gateway in a complex network environment are remarkably improved.

The invention relates to the technical field of network construction type converter control, in particular to a network construction type converter fault ride-through method and system based on dynamic virtual resistance control, and the method comprises the steps: adding a control link based on virtual impedance in a network construction type converter control system; detecting the actual value of the power grid voltage, and judging whether the power grid voltage drops or not; detecting the current amplitude output by the grid-forming converter in real time, and judging whether the current amplitude exceeds a set value or not; if one of the two conditions is met, a virtual impedance control link is started: stage-type current limiting control is performed on the virtual resistor, and the size of the virtual resistor provided by the network-forming converter to the power system is adjusted in real time along with the amplitude of the fault current; and when the power grid voltage recovers and the current amplitude is smaller than the set value, the virtual resistor staged current-limiting control exits. According to the invention, the amplitude limiting of the fault current in the fault ride-through of the network-constructed converter can be realized, so that the fault ride-through capability and transient stability of the network-constructed converter are improved.

The invention provides an urban rail transit regional passenger flow cooperative control and intelligent optimization method and device, and the method comprises the steps: describing the passenger flow evolution through a space-time state network, building a regional cooperative passenger flow control optimization model which takes the minimization of passenger waiting time as an objective function, and considers the constraints such as flow balance and capability constraints; and converting the optimization model into a deep reinforcement learning framework based on a Markov decision process, generating a reward function adaptive to passenger flow control by using a large language model LLM, and continuously optimizing a reward strategy according to the test performance of the agent through interactive training of a deep reinforcement learning agent and establishment of a reward function correction mechanism. Finally, a regional passenger flow control scheme is extracted from the trained agent model, more intelligent and efficient decision support is provided for subway managers, the operation efficiency of an urban rail transit system is improved, and the queuing waiting time of passengers is shortened.

The invention relates to the field of data processing, in particular to a distributed flow limiting method and device, equipment and a medium, which are used for realizing distributed flow limiting control on a service request. The method comprises the following steps: receiving business requests of business servers connected with a cache server, and clustering the business requests based on multi-dimensional object information of the business requests to obtain request clusters; aiming at each request cluster, respectively executing the following steps: sorting the service requests in the request cluster to obtain a request sequence; aiming at each service request in the request sequence, sequentially executing the following steps: acquiring the count of a counter corresponding to the multi-dimensional object information of the service request, comparing the count with a first quantity threshold value, and judging whether the count is updated or not based on a first comparison result; and sending the first comparison result to a service server corresponding to the service request to enable the service server to analyze the first comparison result, and if a return value in an analysis result is a first set value, performing flow limiting processing on the service request.

The invention discloses a method for improving stability of a network-forming converter by considering voltage and phase transients, which solves the problem of over-current control blind areas existing at the initial stage of a fault and at the moment of clearing in a traditional single current limiting method and overcomes the defect that the stability is sharply deteriorated when a traditional strategy is used for coping with a composite fault. The method comprises the following steps: S1, obtaining a virtual synchronous machine swing equation under a synchronous rotating coordinate system and an equivalent circuit model under the action of a circular current limiter; and S2, obtaining a nonlinear relation between the output power and the power angle of the converter, and analyzing a transient stability domain of the converter during a fault period. And S3, obtaining a mixed current limiting strategy, deducing an equivalent circuit model corresponding to the strategy, and further obtaining an output power expression corresponding to the strategy. And S4, obtaining a power damping term acting on an active power control loop, further obtaining a synchronization stability improvement strategy, and deducing a closed-loop model describing the system at the moment.

The invention discloses a circuit and a method for realizing current sharing through master-slave parallel connection, and the method is characterized in that a master machine and a plurality of slave machines are connected in parallel, and are respectively connected to a current sharing control bus through an isolation chip, a TTL and differential mutual conversion unit and an information gating switch in sequence, thereby forming a parallel current sharing circuit; comprising a host issuing current reference circuit and a processing circuit after a slave receives a current reference signal from the host. After a plurality of instrument power supplies are connected in parallel, a user sets a master-slave parallel mode on a front panel of the power supplies and selects a master computer, and other computers are slave computers; when a plurality of power supplies work in parallel, the host issues a current reference signal to the current sharing control bus through the current reference generation circuit, and the slave outputs a corresponding current value according to the current reference signal issued by the host. One of a plurality of power supply modules can be randomly selected as a main module, the flexibility is high, the stability is good, and the power supply has the characteristics of simplicity in wiring and control, low transmission loss of control signals, difficulty in interference of the control signals, balanced output control of all the power supply modules and the like.

The embodiment of the invention provides a control method, a control system, computing equipment, a storage medium and a program product. The method comprises the steps of obtaining a load state of a server in a storage system; wherein the load state is determined based on index data of at least one operation index; updating a flow control threshold according to the load state; and performing flow limiting control on a processing request to be sent to the server according to the flow control threshold. According to the technical scheme provided by the embodiment of the invention, the storage performance is ensured, and the resource utilization rate is improved.

A direct memory access controller (DMAC) includes a virtual channel, a physical channel, and a context manager. The virtual channel is configured to generate a flow control signal for executing a direct memory access (DMA) command. The physical channel includes read and write control logic to initiate data transmission from the source device to the destination device in accordance with the DMA command in response to the flow control signal. In one embodiment, a context manager includes: allocation logic configured to arbitrate between allocation requests from virtual channels and to allocate physical channels to selected virtual channels; and routing logic configured to route a flow control signal from the selected virtual channel to the allocated physical channel, and to route a status signal between the allocated physical channel and the selected virtual channel.

The invention discloses a power angle feedback control method for a network construction converter with synchronous stability and current limiting capabilities, and belongs to the technical field of power electronic control. In order to solve the problems that an existing networking converter is prone to instability in the transient state and insufficient in fault overcurrent capacity, power angle feedback control is introduced, a reliable stable balance point is built for the networking converter, and the synchronization stability of the networking converter is remarkably enhanced; meanwhile, the size of the stable balance point is adjusted in real time according to different fault degrees, active current limiting control of the networking converter is achieved, and the current limiting requirement of the networking converter is effectively met on the premise that the synchronization stability of the networking converter is greatly enhanced.

The invention belongs to the technical field of microwave source equipment, and provides a microwave generator and a power output adjusting method and device, and the method comprises the steps: obtaining target output power, determining a power interval according to the target output power, and determining a corresponding control strategy according to the power interval. The control strategy includes executing several adjustment cycles. The nth regulation period comprises the following steps: executing at least one of a filament current control strategy and a magnetic field current control strategy; executing a power control strategy; the real-time output power of the microwave generator is collected, if the deviation value of the real-time output power and the target output power is within a first set range and lasts for a first time length, all the n control periods are completed, the process is ended, and the next period is not entered any more; otherwise, entering the (n + 1) th period, n being greater than or equal to 1. The optimal adjustment algorithm is selected according to the target output power, and a better power output adjustment effect is achieved.

The invention provides a control system for frequency conversion and speed regulation of a refrigerator compressor, and belongs to the technical field of refrigerator compressors. Stator resistance parameters are identified on line through an extended Kalman filter, and an extended state observer is established to estimate the total disturbance quantity of a direct axis and a quadrature axis; calculating a flux-weakening direct-axis current instruction value in a flux-weakening operation region according to the rotating speed and the direct-current bus voltage, and inputting the current instruction value, the actual current value and the rotor rotating speed into a current loop parameter adaptive optimization model to obtain a proportional integral gain and a feedforward decoupling coefficient; calculating a proportional-integral control voltage and a feedforward decoupling voltage, superposing the proportional-integral control voltage and the feedforward decoupling voltage with total disturbance quantity compensation to obtain an output voltage, and generating a driving signal through space vector pulse width modulation to control an inverter; the technical problem that a refrigerator compressor permanent magnet synchronous motor is low in parameter setting efficiency of a current controller in a weak magnetic operation area and is difficult to adapt to full-speed-domain dynamic working condition changes is solved.

Examples described herein provide a system for controlling power flow in an energy distribution network. The system includes a plurality of inverters, each having an inverter controller associated therewith. The system further includes a utility controller associated with a utility and configured to communicate with at least a subset of the plurality of inverters. The system further includes a customer controller associated with a customer of the utility and configured to communicate with at least the utility controller. The system further includes a direct current (DC) breaker associated with a battery of the customer. The system further includes a DC meter of the customer, the DC meter and the DC breaker each configured to communicate with the utility controller and the customer controller. The utility controller is configured to determine a current operational scenario of the energy distribution network and to control power routing within the energy distribution network.

The embodiment of the invention provides a current sharing control method and an AC-DC conversion system, the current sharing control method is applied to a current sharing controller, the current sharing controller is used for controlling the working state of an AC-DC converter, the AC-DC converter comprises at least two rectification units, and the at least two rectification units adopt a combination of a bridge topology structure and an LLC resonant tank; comprising the steps of determining a target adjustment phase according to absolute values of three-phase input voltage instantaneous values of at least two rectification units; according to the current sampling values of the at least two rectification units, a target duty ratio of a target adjustment phase in each rectification unit is determined, and the target duty ratio is used for indicating adjustment of the voltage gain of the LLC resonant tank; and adjusting the duty ratio of the control signal of the switching tube in each rectification unit according to the target duty ratio of the target adjustment phase in each rectification unit. According to the embodiment of the invention, the gain of the LLC is changed by adjusting the pulse width of the switching tube control signal in the rectification unit and adjusting the amplitude distribution of the input voltage of the resonant tank, so that the output current of the LLC is controlled, and the purpose of current sharing is achieved.

The invention discloses a CAE (Computer Aided Engineering) workflow control subsystem and method based on cloud computing, and belongs to the technical field of crossing of computer simulation and cloud computing, and the subsystem comprises a workflow configuration analysis module which is used for converting a CAE workflow configuration file possibly containing cyclic dependence into a directed acyclic graph state machine through strong connectivity component analysis; the workflow state machine operation module is used for dynamically deriving task groups which can be executed in parallel in the next stage in the state machine according to the current state; and the workflow scheduling module is used for submitting the tasks to a cloud solving platform in parallel and realizing fault recovery through state persistence. Through deep fusion of a graph theory method and a cloud computing architecture, automatic scheduling, efficient parallel execution and reliable fault tolerance of the CAE workflow are realized, and the computing resource utilization rate and the system reliability are remarkably improved.

The invention discloses a teaching live broadcast control method, a teaching live broadcast control system, a teaching live broadcast control medium and teaching live broadcast control equipment based on multi-protocol signal flow scheduling, a multi-protocol signal source is adaptively accessed, a protocol analysis plug-in is correspondingly loaded to analyze a protocol, and different types of heterogeneous flows are converted into standardized data flows. Extracting stream features, and performing scene recognition; and dynamically adjusting the bandwidth allocation strategy based on the network state and the terminal capability. And on the basis of the multi-target reinforcement learning model, generating an optimal strategy of bandwidth allocation for live broadcast stream pushing and local distribution requirements. Stream transcoding and format conversion are carried out, and multi-signal stream timestamps are dynamically calibrated and synchronized; based on a Transform model, multi-modal content matching is carried out, knowledge chain marks are generated, and finally terminal output is carried out. The method has the advantages of full-scene protocol compatibility, dynamic scene adaptive scheduling, intelligent resource dynamic allocation, high-precision time synchronization calibration and content intelligent association matching.

Devices, systems, methods, and processes for incast congestion management are described herein. Typically, in a Packet Sequence Number (PSN) based Remote Direct Memory Access (RDMA) network, Priority Flow Control (PFC) is asserted upstream when an incast congestion event occurs, which can victimize unrelated flows. Thus, instead of asserting PFC, a switch in the PSN based RDMA network detects an incast congestion event and directly notifies one or more Reliable Connection (RC) Queue Pairs (QPs) of various sending devices, associated with the incast congestion event using Receiver Not Ready (RNR) negative acknowledgements (NACKs). These RNR NACKs are associated with unique pause time-periods. The associated RC QPs receive the RNR NACKs and pause packet transmission. The associated RC QPs resume packet transmission upon expiration of corresponding pause time-periods. Thus, the packet transmission from the contributing RC QPs is spaced out, avoiding all packets reaching a switch output port at the same time.

The invention belongs to the field of information security, and relates to a multi-agent network security operation method and device, electronic equipment and a storage medium, and the method comprises the steps: constructing a layered architecture from physical hardware to an upper application; receiving a network security global task, and decomposing the network security global task into task subsets in a coarse-grained layer; the atomic tasks are allocated to appropriate agents, a task alliance is formed, and a collaborative strategy is formulated; by improving the credible interference-free information flow control method of the operating system process, interference-free information interaction between intelligent agents is adapted; performing real-time intention synchronization and cooperation adjustment between the intelligent agents; feedback information in the task execution process is collected, the task completion condition is evaluated, and the multi-granularity collaborative decision process is optimized. The requirements of an intelligent network space security protection system are met; the method can be applied to security operation system platform scenes of multi-agent cooperation, multi-robot cooperation, multi-agent software systems, multi-digital person cooperation and the like.

The invention discloses a high-bandwidth current control method and system used for a permanent magnet synchronous motor, and relates to the technical field of high-bandwidth current control of the permanent magnet synchronous motor, and the method comprises the following steps: S1, a current sampling and updating step: carrying out the secondary sampling of the stator current of the permanent magnet synchronous motor in a pulse width modulation carrier period, and two times of pulse width modulation duty ratio updating are correspondingly carried out to form double-sampling double-updating time sequence control. Through an innovative double-sampling and double-updating time sequence control strategy, two times of current sampling and two times of duty ratio updating are executed in a PWM carrier wave period, the total delay of the system is greatly reduced from the level of a traditional method, and according to the control system theory, the current loop bandwidth and the system delay are in an inverse proportion relation, so that the current loop bandwidth and the system delay are effectively controlled. The significant reduction of the time delay directly brings the multiplied increase of the current loop bandwidth, and the improvement lays a solid foundation for the high dynamic response performance of the whole servo system, so that the system can respond to the instruction change with higher frequency.

The invention belongs to the field of power electronic technology and new energy grid-connected control, and particularly relates to a cooperative control system and method for parallel operation of multiple new energy inverters. The method comprises the following steps: firstly, establishing a small signal model of an inverter parallel system, and analyzing dynamic characteristics of the system under power disturbance; secondly, realizing power decoupling and current sharing control based on a frequency-power droop characteristic; furthermore, coordinated operation of multiple energy sources such as photovoltaic energy and energy storage is realized by monitoring the phase of the direct-current bus voltage and the alternating-current side voltage in real time; the method has high engineering applicability, and high-speed real-time communication between parallel units is not needed; the virtual impedance parameters Rv and Lv have clear physical significance and are easy to preliminarily set according to line parameters; the calculation of the dynamic matching self-adjusting module is linear operation, the requirement for the computing power of a processor is low, and integration and implementation on an existing inverter control platform are facilitated.

The invention discloses an AI dialogue flow control method, system and device supporting real-time interruption of a user, a medium and a program product. The method comprises the steps that a user request is received, and a flow session is established; based on the stream session, requesting LLM increment generation, receiving fragments generated by increment, returning the fragments, and pushing the fragments to the client; when a click stop request of a user is received, an STOP signal is sent; when the STOP signal is monitored, sending a mark termination request; after a mark termination request is received, a subsequent generation termination request is sent to the LLM, a STREAMTERMINATED semantic event is published and broadcasted, and generated content and a termination mark are returned to the client; terminating subsequent generation comprises stopping untriggered subsequent reasoning and tool chain calling; discarding the tail cache which is not sent; and recording the output token count, and terminating the offset. The AI dialogue flow control method supports real-time interruption of the user, is low in delay, clear in semantics and recoverable, and further has the advantages of saving resources, being high in stability, capable of being universally expanded, gaining behavior analysis and the like.

The invention discloses a power supply modular combination method and system based on a standardized interface. The method comprises the following steps: step 1, collecting data through a sensor; 2, the central control hub fuses data and establishes a four-dimensional collaborative model; 3, the MOSFET driving circuit carries out adjustment according to a control instruction of the central control hub; and 4, the AI prediction current sharing module predicts the load change trend of the current power supply system and the performance degradation condition of each module through a built-in machine learning model, and dynamically adjusts the current distribution of each module based on the prediction result in combination with a target current value in an instruction, thereby realizing the current distribution of the power supply system. The system comprises a central control hub, a sensor unit, an AI prediction current sharing module and an MOSFET drive circuit. The method has the advantages that dynamic impedance matching and current sharing control closed loop are achieved, AI prediction current sharing is achieved through a machine learning model, output impedance and current distribution of a power module are accurately controlled, load changes are dynamically adapted, and current sharing precision and system stability are improved.

The invention provides a sensorless parallel current-sharing control method and device for a dual active bridge converter, and the method comprises the steps: building the corresponding relation between the phase-shifting offset of DAB except a main DAB and the circuit parameters of DAB except the main DAB, and the circuit parameters and phase-shifting offset of the main DAB according to a power balance condition when all DAB circuit parameters are not matched; the IPOP dual-active bridge converter starts to operate in a common phase shift phase ratio stage, the phase shift phases of the DABs are equal, a disturbance component is applied to the phase shift phase ratio of the main DAB, and a transmission power expression of the DABs except the main DAB and the main DAB in a new steady state is obtained; calculating the phase shift offset of the DAB except the main DAB relative to the main DAB; then outputting a current based on a phase shift offset amount of DABs other than the main DAB relative to the main DAB; current sharing can be well realized when the system is in a forward mode and a reverse mode; current sharing can be realized without a current sensor.

The invention relates to the technical field of power supplies, and discloses a synchronous rectification control circuit and a synchronous rectification power supply device, and the circuit comprises a power conversion module, an output current sampling module, and a PWM controller. The power conversion module comprises a follow current switch tube which is connected in parallel with two ends of a load. The output current sampling module is connected in series in a secondary winding loop and is used for collecting output current flowing through the secondary winding loop and generating an output current signal; the PWM controller is connected with the output current sampling module and is used for driving the follow current switch tube, the PWM controller is configured to compare the output current signal with a preset threshold value, and when the output current signal is greater than or equal to the preset threshold value, a first group of PWM control signals is generated to drive the follow current switch tube; and when the output current signal is smaller than the preset threshold value, stopping driving the follow current switch tube. According to the invention, no-load loss can be reduced, and the requirements of electronic products for high power density and low loss can be met.

The application discloses a liquid cooling plug for a server liquid cooling device, which comprises a plug main body, a sealing ball, a liquid flow control assembly, a sealing assembly and a connecting nut. The sealing ball is arranged in the plug main body. The sealing assembly is arranged at the end of the plug main body and extends into the plug main body at least partially. The liquid flow control assembly is arranged at the end of the plug main body and can move relative to the plug main body. The connecting nut is arranged outside the plug main body and is used for connecting the plug main body to an interface. The liquid cooling plug can prevent liquid in the liquid cooling plug from splashing during plug-in and plug-out, and the damage risk of the server is reduced.

The invention discloses a CDC solenoid valve shock absorber driving controller system comprising a power supply module used for supplying power to the system; the main controller is connected with the power supply module and is used for outputting a PWM control signal according to the target current set value; the grid driving module is connected with the main controller and is used for boosting the PWM control signal to a driving level; the power conversion module is connected with the gate driving module and is used for generating a pulse power supply according to the boosted PWM control signal; the current acquisition module is connected between the power conversion module and the CDC electromagnetic valve shock absorber and is used for acquiring loop current in real time and feeding back a digital current signal; and the main controller corrects the duty ratio of the PWM control signal according to the digital current signal to form a closed-loop current control link. According to the method, the loop current of the CDC electromagnetic valve shock absorber can be quickly, stably and accurately maintained at a target value, and the control precision and the dynamic response capability are remarkably improved.

The application discloses a kind of LCL grid-connected current feedback active damping control method and system, belong to power filter control technical field, including the grid-connected current i2 of the acquisition inverter net side;Grid-connected current i2 flows through negative low-pass-high-pass filter and is handled, obtains feedback current;Feedback current and the output of inverter current controller are superposed, as the control signal of LCL filter.The application will not amplify high-frequency harmonic current, and the control system still has good robustness when LCL filter parameter changes.

A method for quality of service (QoS) flow control dynamically optimizes network resource allocation based on terminal power consumption status. An access network function receives terminal status information from an application function (AF) and determines a QoS profile for associated QoS flows from alternative profiles. The selected QoS profile is transmitted to a core network function or terminal for QoS updates. The terminal status information, which may include battery level, CPU load, or overheating status, informs the selection process to balance performance and efficiency. Core network functions manage QoS updates by interacting with the AF, access network, and terminals. The method, apparatus and computer readable medium ensure adaptive and energy-efficient QoS management for improved user experience and resource utilization in diverse network environments.

The invention relates to the technical field of large model service management, and discloses a system for carrying out self-adaptive current limiting on a token number and a QPS called by a large model. A dynamic monitoring module of the system is responsible for collecting a request flow data set comprising a token consumption sequence, a request frequency sequence and a response delay sequence; a traffic feature extraction module performs multi-dimensional feature analysis on the data set to generate a traffic feature matrix containing token consumption rate, request frequency fluctuation coefficient and delay sensitivity index; the adaptive current-limiting decision module dynamically matches a load balancing strategy based on the matrix, and generates a current-limiting control parameter set containing a token quota threshold and a QPS upper limit threshold; the real-time regulation and control module dynamically adjusts the request queue according to the request queue to generate a new request scheduling sequence; and the feedback optimization module monitors the execution effect and iteratively updates the load balancing strategy. According to the invention, through real-time perception and dynamic adjustment, refined and adaptive management of large model service resources is realized.

This invention discloses a method and system for extracting and associating physical and logical circuits in a DC control and protection system. The method includes: constructing physical circuits based on engineering design drawings and optical cable documents; parsing the graphical program of the DC control and protection device to extract communication-related symbol information and constructing logical circuits; and representing the circuit data using a directed graph to associate the physical and logical circuits. This invention can efficiently realize the automatic construction and association of communication circuits, improving the efficiency of communication circuit diagnosis, debugging, and operation and maintenance in ultra-high voltage DC control and protection systems.

The invention relates to the technical field of hydrogen production power supplies, and discloses a 5.7 MW high-power hydrogen production power supply multi-machine parallel current sharing algorithm, which effectively improves the current sharing precision of a 5.7 MW high-power hydrogen production power supply multi-machine parallel system through droop control and PI regulation current sharing control improved by combining a master-slave architecture, and can control the current imbalance degree of each parallel module within + / -3%. The method is far better than a traditional method, ensures that each power supply module uniformly shares a load, gives full play to the overall power output capability of the system, improves the hydrogen production efficiency, has a rapid dynamic response characteristic, can rapidly adjust current distribution under the condition of sudden change of the load, enables the system to recover a stable current-sharing state within 20ms, avoids equipment damage caused by current impact, and improves the hydrogen production efficiency. Reliable operation of the system is guaranteed, and complex and changeable load requirements in the hydrogen production process are met.