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54results about How to "Improve schedulability" patented technology
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Method of scheduling executions of processes with various types of timing properties and constraints
InactiveUS7165252B1Easy to useIncrease opportunitiesMultiprogramming arrangementsMemory systemsRunning timeDistributed computing
A system and methods for scheduling execution of various types of processes. Using information gathered relating to the different processes, pre-run-time scheduling is integrated of run-time scheduling to guarantee that the executions of the processes will satisfy all the specified relations and constraints. Whenever a new set of processes arrives in the system, the system schedules their execution in two phases: a pre-run-time (off-line) phase performed by a pre-run-time scheduler, and a run-time scheduler (on-line) phase performed by a run-time scheduler.
Owner:XU JIA
Multi-time scale microgrid energy control method considering demand response
ActiveCN103346562AImprove schedulabilityReduce spare capacitySpecial data processing applicationsAc network circuit arrangementsMicrogridEnergy control
The invention discloses a multi-time scale microgrid energy control method considering demand response. According to the multi-time scale microgrid energy control method considering the demand response, in order to achieve the purpose of lowest operation cost of a microgrid, the electricity generating characteristic of a micro power source and demand response load power utilization property difference are combined to provide a user side load interruptible capacity limiting value, an electricity generating unit power output limiting value, a climbing constraint condition, an energy storage unit storage capacity constraint condition and an interaction maximum capacity constraint condition, an economic combination which can guarantee the optimum environmental benefit is searched under the multi-time scale condition by means of the genetic optimization algorithm, frequency modulation and spare capacity of a main grid are indirectly reduced, and the economical performance of complete-period operation of the grid is improved.
Owner:CEEC JIANGSU ELECTRIC POWER DESIGN INST
System based on integrated microservice configuration
InactiveCN106878393AImprove schedulabilityFast and accurate developmentTransmissionResource managementMicroservices
The invention discloses a system based on integrated microservice configuration, and the system comprises an application module, an interface access module, a business service module, a public service module, and a resource management module. The application module transmits a data request. The interface access module is used for receiving and processing the data request transmitted by the application module, and determines a microservice unit, executing the data request, according to the data request. The business service module is used for receiving the microservice unit information transmitted by the interface access module, and carrying out the call of the microservice according to the microservice unit information. The public service module is used for searching a corresponding service according to the corresponding relation between a preset microservice and a service, wherein the searched service is used for receiving a microservice instruction. The resource management module is used for storing the data of the service in the public service module, and is used for transmitting the corresponding data to the public service module according to a service request. The business service module enables the data to be transmitted to the application module through the interface access module. According to the invention, the system provides the reliable guarantee for the improvement of the schedulability and the quick and accurate development of new demands.
Owner:深圳市商沃科技发展有限公司
Method for scheduling executions of real-time processes to guarantee satisfaction of various timing constraints
InactiveUS7444638B1Easy to useIncrease opportunitiesMultiprogramming arrangementsMemory systemsRunning timeReal-time computing
A system and methods for scheduling executions of real-time processes, including periodic processes and asynchronous processes to guarantee satisfaction of various timing constraints. The system schedules their executions in two phases: a pre-run-time (off-line) phase performed by a pre-run-time scheduler, and a run-time (on-line) phase performed by a run-time scheduler.
Owner:XU JIA
Multi-imaging satellite emergency task dynamic scheduling method
ActiveCN102867107AReduce the number of imagingNarrow solution spaceSpecial data processing applicationsSatelliteCompletion rate
The invention discloses a multi-imaging satellite emergency task dynamic scheduling method. In order to solve the technical problem, the multi-imaging satellite emergency task dynamic scheduling method is invented to realize a scheduling target on the premise of satisfying the limitation. According to the technical scheme, the multi-imaging satellite emergency task dynamic scheduling method comprises the steps of: synthesizing adjacent target unit tasks located in one field range of a satellite sensor based on task classification; if the allocation of the synthesized tasks is failed, taking out the unit task with the maximum priority in the synthesized tasks through a restoration way for synthesis to therefore decompose the task into a synthesized task and an independent task with more imaging chances; meanwhile, establishing an available time slot in a new task insertion process; moving tasks in a waiting queue backwards; and obtaining a time slot satisfying with the implementation of newly inserted task when the waiting tasks are executable, thereby further improving a scheduling efficiency. By the adoption of the multi-imaging satellite emergency task dynamic scheduling method, tasks can be synthesized, the performing sequence and the performing time of the tasks are adjusted dynamically, imaging time of the satellite is reduced, and accomplishment rate and schedulability of the tasks are improved.
Owner:NAT UNIV OF DEFENSE TECH
Method for business dispatching in time triggering FC network
ActiveCN108777660AReduce space complexityMeet the needs of real-time data configurationFibre transmissionData switching networksChannel networkFibre Channel
The present invention discloses a method for business dispatching in a time triggering FC network, and relates to the field of an FC network. The method comprises the following steps of: establishinga network model, calculating a cluster period, and determining the length of a single time slot of each time triggering message; determining the priority of a TT message according to a certain rule; planning a link transmitting the TT message; detecting the schedulability of the TT message; selecting the TT message with the highest priority to arrange the time slot of the TT message; according tothe periodicity and the transmission link of the TT message, arranging all other time slots; arranging the TT message of the next priority, and solving a time slot map meeting conflict-free and periodsending of all the TT messages in all the links; and according to a whole network and total business time slot map, solving the sending and receiving time dispatching tables in each terminal and eachexchange. The method ensures the transmitting and receiving of the message determinacy in the optical fiber channel network so as to meet the demand of real-time message dispatching in the complex application system and allow the upper-layer application system performance to be more determined and reliable.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
Solar photovoltaic grid-connected inversion control system based on field programmable gate array (FPGA)
InactiveCN102142693AImprove securityImprove stabilitySingle network parallel feeding arrangementsSystems intergating technologiesPrediction algorithmsControl system
The invention discloses a solar photovoltaic grid-connected inversion control system based on a field programmable gate array (FPGA), which can control a household photovoltaic inversion system to realize grid-connected generation, predict a generation power of the system and realize real-time communication with a grid dispatching centre. The system comprises a signal detection circuit, a control circuit, a communication circuit, a grid-connected circuit and a driving circuit, wherein the signal detection circuit, the communication circuit, the grid-connected circuit and the driving circuit are connected with the control circuit respectively and operate cooperatively under the control of the control circuit. The system predicts the generation power of the household photovoltaic inversion system by using a power prediction algorithm based on a back propagation (BP) neural network and sends a predicted result to the grid dispatching centre in real time. The grid dispatching centre can manage running modes of photovoltaic generation and a conventional power supply reasonably according to the predicted result, reduce an adverse effect on a grid due to incorrect access of a household photovoltaic generation device and improve the schedulability of the photovoltaic generation.
Owner:XI AN JIAOTONG UNIV
Wind power-photothermal joint power generation system and operation method thereof
ActiveCN108321837AReduce shockIncrease profitSolar heating energySolar heat storageElectricityElectronic systems
The invention discloses a wind power-photothermal joint power generation system. The power generation system is characterized by comprising a wind power sub system, a photothermal sub system, an electric heating sub system and an optimization dispatching sub system; the wind power sub system is connected with the photothermal sub system through the electric heating sub system; and the optimizationdispatching sub system is connected with the wind power sub system and the photothermal sub system separately. The power generation system has the advantages as follows: 1) wind power and CSP are totally used as a node of a power grid for suppressing wind power fluctuation before wind power is connected to the power grid, thereby enabling the joint system to dispatch like a conventional power generation system, and reducing impact of wind power to the power grid; 2) by adding an electric heating apparatus to the system, the wind resource utilization rate is improved; and 3) by taking the maximum of the operational benefit of the wind power-CSP joint power generation system as the target in the optimization dispatching sub system, wind curtailment is lowered effectively, thereby achievingrelatively high schedulability, safety and economic efficiency.
Owner:HOHAI UNIV
Anti-sagging control method for photovoltaic inverter in microgrid
ActiveCN104578144AImprove stabilityImprove schedulabilityPhotovoltaicsSingle network parallel feeding arrangementsCapacitanceMicrogrid
The invention relates to the technical field of photovoltaic power generation and aims at providing an anti-sagging control method for a photovoltaic inverter in a microgrid. The method comprises the following steps: realizing the whole anti-sagging control process through a photovoltaic inverter anti-sagging controller; calculating the frequency and the voltage of an alternating current bus of the microgrid by an anti-sagging control module to obtain an active power instruction and an inactive power instruction; sampling and fitting the output direct-current current value of a photovoltaic battery and the capacitance and voltage values of a direct current bus by a photovoltaic power-voltage curve fitting module to obtain a photovoltaic power-voltage curve; carrying out closed-loop control by the anti-sagging control module, and controlling the inverter by a current inner ring controller and a space vector pulse width modulation circuit through the proportion and integral action of a voltage / inactive closed-loop control module. The anti-sagging control method adopts a uniform control structure and can work in the grid connection and islanding two states of the microgrid. The schedulability of the photovoltaic power generation unit is enhanced in the grid connection state. The photovoltaic power generation unit can run in a maximum power point tracking mode in the islanding state.
Owner:ZHEJIANG UNIV +1
Thermal power generating unit coordination control method based on condensate throttling
ActiveCN104932450AIncrease the variable load rateImprove schedulabilityProgramme total factory controlNew energyDeaerator
The present invention discloses a thermal power generating unit coordination control method based on condensate throttling which belongs to the thermal power generating unit coordination control technology field. The method comprises the steps of sending a unit load deviation to a master controller; using the master controller to send out a rotating speed change instruction, and changing the rotating speed of a condensate pump motor after an amplitude limit module; changing the unit load to form the condensate throttling control due to the condensate flow change; integrating the condensate flow variable quantity to obtain a water storage variable quantity delta Q in a deaerator, and obtaining the deaerator instant water level height hx corresponding to the delta Q by utilizing a dichotomy; forming the deviation of the hx and a deaerator water level setting height ho to sent to a slave controller, using the slave controller to generate a fuel quantity instruction signal to send to a coal mill to thereby influence the unit load and form the fuel quantity control, and recovering the deaerator water level to h0. The thermal power generating unit coordination control method based on the condensate throttling enables the changing load-acceleration of a coal-fired generating unit to be improved greatly, the schedulability of the coal-fired generating unit to be improved, and has great benefits for the new energy electric power large-scale grid connection of our country.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Hardware real-time operation system
InactiveCN103412755AReduce overheadEffectively provide utilizationSpecific program execution arrangementsOperational systemFuzzy sliding mode control
The invention discloses a hardware real-time operation system. The hardware real-time operation system comprises an ARM (advanced RISC machines) processor and an FPGA (field programmable gate array) which are connected via an FSMC (fuzzy sliding mode control) bus, wherein the FPGA is used for realizing a preemptive scheduler, and managements on tasks, a signal quantity, an oil tank, a message queue, a mutual exclusion signal quantity and an event flag group based on the preemptive scheduler; and the ARM processor is used for executing the tasks and realizing task switchover. By implementing the technical scheme of the invention, the FPGA does not occupy the processing time of the ARM processor because of running independently from the ARM processor, and the saved time is used for executing task programs, thus successfully reducing the system expense of the ARM processor; in particular, the utilization rate of the ARM processor is effectively increased in applications needing rapid task switchover. Therefore, via the operation system realized by hardware, the schedulability and real-time performance of the task set are improved.
Owner:SHENZHEN DONG YUAN ELECTRONICS CO LTD
Virtual cloud fault-tolerant resource supply method
ActiveCN105005506AImprove resource utilizationImprove schedulabilityResource allocationSoftware simulation/interpretation/emulationVirtualizationStart time
The invention discloses a virtual cloud fault-tolerant resource supply method. The method is characterized by comprising the following steps of: acquiring arrived dependent task group information and virtual cloud physical host information; building a primary version and a backup version of each task in a dependent task group by using a primary-backup (PB) model; allocating earliest start time and latest finish time to each version of each task in the dependent task group; dividing a plurality of virtual machines on each activated physical host, and acquiring information of each virtual machine on each activated physical host; loading each version of each task in the dependent task group onto each virtual machine on each activated physical at a specified time slot; running each loaded version of each task in the dependent task group according to the specified time, and adjusting the resource utilization rate of a system by using a resource extension mechanism and a resource contraction mechanism; and finishing all tasks in the dependent task group and returning a task result.
Owner:NAT UNIV OF DEFENSE TECH
Power quality promotion method of light storage power generation system based on hierarchical control
InactiveCN105305430ASmoothing fluctuationsImprove schedulabilityPolyphase network asymmetry elimination/reductionReactive power adjustment/elimination/compensationPower qualitySelf adaptive
A power quality promotion method of a light storage power generation system based on hierarchical control provided by the invention comprises the following steps: a, constructing a light storage combined power generation system, wherein the constructed light storage combined power generation system comprises a hybrid energy storage unit arranged on the direct current side of a distributed photovoltaic power generation system; and b, carrying out active management on power quality through power dispatcher control and local power of the light storage combined power generation system. The distributed light storage combined power generation system can effectively stabilize the fluctuation of photovoltaic output power, and strengthens the schedulability of the light storage combined power generation system; and a harmonic current detecting algorithm based on self-adaptive iteration can effectively detect the harmonic component of local load, and provides guarantee for local compensation of the power quality of the distributed light storage combined power generation system. The invention provides a new method for operation and control of the high-permeability photovoltaic power generation system, can effectively promote the power quality of power grid, and provides powerful guarantee for safe and stable operation of the power grid.
Owner:CHONGQING UNIV +3
Method for optimizing and controlling energy storage system with variable progressive step length and variable expected outputting
InactiveCN103915851AGuaranteed maximum utilizationGuaranteed continuityPower oscillations reduction/preventionElectricityCritical limit
The invention discloses a method for optimizing and controlling an energy storage system with variable progressive step length and variable expected outputting. The method comprises the following steps that a single charging and discharging section serves as the progressive control step length, and an SOC critical limiting value circulating charging and discharging model with variable progressive step length and variable expected outputting is established; multi-objective optimization functions with the target of maximum progressive control step length and the minimum overall expected outputting fluctuation ratio are established; on the premise of the SOC critical limiting value circulating charging and discharging model, solution calculation is carried out on the multi-objective optimization functions of the energy storage system based on the NSGA-II algorithm, and the optimal solutions of the multi-objective optimization functions of the energy storage system of a wind power are determined respectively. The maximum ESS utilization rate can be guaranteed through the SOC critical limiting value circulating charging and discharging model, frequent charging and discharging can be avoided through strict charging and discharging state converting, and the continuity of the ESS performance can be guaranteed powerfully. The stabilizing effect of the control strategy can effectively adapt to ultra-short-time prediction and wind electricity economic dispatch level.
Owner:SHANDONG UNIV
Wind-storage combined system scheduling method and apparatus capable of improving wind power schedulability
InactiveCN105226730AIncrease profitApply Coordinated SchedulingSingle network parallel feeding arrangementsWind energy generationElectricityComputer module
The invention discloses a wind-storage combined system scheduling method and apparatus capable of improving the wind power schedulability. The scheduling method includes: the available scheduling output of a wind-storage combined system is calculated via the current charge state of a storage battery and the wind power prediction output; a scheduling model containing the wind-storage combined system is established, and the scheduling model is formed by a target function and restriction conditions; the target function serves as the bacteria fitness value, an improved bacteria foraging algorithm is employed to solve the scheduling model; and if the solution result satisfies all the restriction conditions, the solution result is the optimal solution and is outputted. The scheduling apparatus comprises a calculation module, an establishing module, a solution module, and an output module. According to the method and the apparatus, based on an operation strategy of the wind-storage combined system, the scheduling model of the wind-storage combined system is established, the improved bacteria foraging algorithm is improved for solution, the economy of the operation of the wind-storage combined system is fully considered, the wind power schedulability is effectively improved, the wind power utilization rate is increased, and the method and the apparatus are applicable to the coordination scheduling of the wind-storage combined system.
Owner:NORTHEAST DIANLI UNIVERSITY
Capacity planning method in view of energy storage suppression fluctuation power of economic power grid dispatching
InactiveCN105160440AReduce storageReduce energy storage capacity requirementsElectrical storage systemForecastingConstant powerCapacity value
The invention discloses a capacity planning method in view of energy storage suppression fluctuation power of economic power grid dispatching. The method comprises: establishing a mathematic model by taking a minimum grid-connection power target value offset variance as an optimization target, and on the basis of the established mathematic model, establishing a capacity planning model by taking minimum operation and construction costs of an energy storage power station as targets; and performing solution computation on a capacity optimization target function corresponding to a capacity planning model of a mixed energy storage power station, and determining an optimal capacity value of the mixed energy storage power station. According to the method, the mathematic model is established by taking the minimum grid-connection power target value offset variance as the optimization target, wherein the target value is defined as a stepped curve, so that periodic constant power output of wind power is realized and the dispatchability is improved; and at the same time, the power offset variance in the model is minimal, so that the sum of stored and released energy of an energy storage system can be reduced and the energy storage capacity demand is lowered.
Owner:STATE GRID CORP OF CHINA +3
Method and system for optimized dispatching of economic benefit of photovoltaic power generation system
InactiveCN108832654AImprove schedulabilityIncrease incomeSingle network parallel feeding arrangementsPhotovoltaic energy generationEconomic benefitsEngineering
The invention discloses a method for optimized dispatching of economic benefit of a photovoltaic power generation system. The method comprises the steps of determining a dispatching strategy of the photovoltaic power generation system; building an optimization strategy of the photovoltaic power generation system, wherein the optimization strategy is used for optimizing according to a first allocation proportion when power generation quantity of the photovoltaic power generation system is larger than residual electric quantity of a power utilization load and is used for optimizing according toa second allocation proportion when the power generation quantity of the photovoltaic power generation system is smaller than insufficient electric quantity of the power utilization load; building anoptimized dispatching target function taking benefit of the photovoltaic power generation system within a set period as an optimization target and taking the first allocation proportion and the secondallocation proportion as decision variables; and optimizing the first allocation proportion and the second allocation proportion by employing the dispatching strategy so as to achieve maximum user benefit of the photovoltaic power generation system.
Owner:CHINA ELECTRIC POWER RES INST +1
Deadline-oriented scheduling method capable of meeting time determinability
InactiveCN104486250AGuaranteed certaintyImprove schedulabilityData switching networksNetwork communicationComputer science
The invention discloses a Deadline-oriented scheduling method capable of meeting time determinability, and belongs to the technical field of airborne network communication. According to the method disclosed by the invention, the scheduling priority of a data frame which is closer to Deadline is higher; meanwhile, scheduling among all ports of a switch is achieved by a fair polling mode; fair service of different links is ensured; the determinability of network exchange delay is ensured. According to the Deadline-oriented scheduling method, the problems that a safe key business requires high real-time scheduling service, and end-to-end delay has an upper bound are solved; the requirements of the delay determinability of an airborne network is ensured to the maximal extent; the data frame which cannot meet the delay requirements can be discarded in advance; the time integrity of the data frame is ensured.
Owner:AVIC NO 631 RES INST
Method and device for trusted data interaction between block chain and out-of-chain system
ActiveCN112818058AAlleviate the computational burdenIncrease flexibilityDatabase management systemsResource allocationBusiness dataData needs
The invention discloses a method and device for trusted data interaction between a block chain and an out-of-chain system, and the method comprises the steps of converting a corresponding uplink data request into a task when a user contract sends a data request which needs to obtain out-of-chain business data, and transmitting the task to a server; when the user contract is in service association with the out-of-chain service system in the execution process, converting a corresponding downlink service driving request into a task, and dynamically acquiring data needing to be interacted through the task. According to the execution mode based on task driving, the flexibility and schedulability of system execution are greatly improved, the operation burden of the node in a complex application scene can be effectively relieved, and the purpose of uplink and downlink reliable data interaction between the block chain and an out-of-chain system can be achieved.
Owner:MR RAY CHENGDU TECH CO LTD
Energy storage system optimization method with wind power prediction errors compensated
ActiveCN110649638AMake up for forecast errorImprove schedulabilityEnergy storageAc network load balancingMathematical modelControl theory
The invention discloses an energy storage system optimization method with wind power prediction errors compensated, which comprises the following steps: (1) the wind power prediction errors of a windpower plant are analyzed to obtain a prediction error distribution law; (2) a mathematical model of rated power and rated capacity of the energy storage system is built; (3) under a certain error compensation degree, an objective function with the purpose of maximizing the income of the wind power plant is built; and (4) the influence of the change of the electricity price and the energy storage cost on the income of the wind power plant is considered from the perspective, and an electricity price interval and an energy storage cost interval which enable energy storage to have investment valueare found out.
Owner:QILU UNIV OF TECH
Industrial wireless network data scheduling method and apparatus based on the mixture of key tasks
ActiveCN106603431AImprove reliabilityImprove schedulabilityData switching networksData streamNetwork redundancy
The invention discloses an industrial wireless network data scheduling method based on the mixture of key tasks. The method comprises: obtaining the data stream information of a network; according to the data stream information, determining the data streams in the network whose paths are superposed with the path of a first data stream; choosing from the data streams whose paths are superposed with the path of the first data stream the level-identical data stream sharing the same key level as the first data stream; determining whether the first data stream can be scheduled or not if the first data stream awaits at an integration node until the arrival of the level-identical data stream to the integration node; if the first data stream can be scheduled, integrating at the integration node the first data stream with the level-identical data stream and transmitting the integrated data stream; and otherwise, directly transmitting the first data stream that reaches the integration node in advance. The embodiments of the invention reduce the network redundancy, the number of channel conflicts and transmission conflicts in an industrial wireless network and at the same time, the energy overhead generated from node transmission. The method and apparatus also make the data stream with high key level more reliable and more scheduling.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Fault-tolerant task-scheduling method based on backward movement in cloud
ActiveCN105094971AImprove schedulabilityProgram initiation/switchingSoftware simulation/interpretation/emulationVirtualizationStart time
The invention discloses a fault-tolerant task-scheduling method based on backward movement in the cloud. The fault-tolerant task-scheduling method is characterized by comprising following steps: acquiring reached information on dependent task groups and information on physical host of a virtualized cloud; utilizing a PB model as a primary edition and a secondary edition set up by each task in dependent task groups; assigning earliest start time and latest finish time for each edition of each task in each dependent task group; marking off multiple virtual machines on each activated physical host and acquiring information on each physical host of each activated physical host; loading each edition of each task in each dependent task group to each virtual machine of each activated physical host within the assigned period of time; operating each edition of each task in each dependent task group on a schedule according to assigned time; and utilizing the method of moving tasks backwards to adjust earliest start time of scheduled tasks as a time window for providing tasks in newly-arriving dependent task groups.
Owner:NAT UNIV OF DEFENSE TECH
Reliability perception time-sensitive network routing method applied to electric power data transmission
ActiveCN112688812AImprove schedulabilityGuaranteed real-timeData switching networksPathPingData transmission
The invention belongs to the field of Ethernet routing, and relates to a reliability perception time-sensitive network routing method applied to power data transmission, which comprises the following steps: 1, setting a non-overlapping path group, establishing a probability model, measuring the reliability of a network, and selecting a routing candidate solution according to the probability model; 2, after a candidate solution list is selected, establishing a cost function; and 3, minimizing the cost function through a heuristic method based on an ant lion algorithm, and finding a final routing solution enabling the cost function to be relatively small. The method is suitable for an industrial scene, and compared with a traditional method, the reliability of the routing method is ensured while the schedulability of the routing method is improved, so that the real-time performance of data transmission is ensured.
Owner:ZHEJIANG UNIV +1
A real-time task scheduling method for single-core systems with imprecise computations
ActiveCN109308216AImprove schedulabilitySufficient system computing resourcesProgram initiation/switchingComputational resourceQuality of service
The invention relates to a single-core system real-time task scheduling method aiming at imprecise calculation, comprising the following steps: step 1, establishing a task model according to the taskcharacteristics in the single-core system; step 2, setting up a task model according to the task characteristics in the single-core system. 2, construct an off-line scheduling module and an on-line schedule module according to a task scheduling time point in that task model; 3, construct a task calculation precision unit according to that execution precision of the task for the on-line schedulingmodule; 4, construct an average degree unit for calculating that task exceed the deadline according to the average degree of the task exceeding the deadline for the on-line scheduling module; 5, construct a task exceeding cut-off time frequency calculation unit accord to that frequency of the task exceeding the cut-off time for the on-line scheduling module; The invention guarantees the calculation precision, the cut-off time exceeds the degree and the cut-off time exceeds the upper limit of probability respectively, and on the premise of guaranteeing a certain QoS (Quality of Service), more fully utilizes the systematic calculation resources.
Owner:TIANJIN UNIV
Probabilistic real-time task scheduling method based on pWCET shaping
ActiveCN108845870AValue reductionReduce computational complexityProgram initiation/switchingResource allocationComputation complexityRound complexity
The invention provides a probabilistic real-time task scheduling method based on pWCET (probabilistic worst case execution time) shaping, and belongs to the technical field of real-time systems. A probabilistic real-time task scheduling scheme based on the pWCET shaping is proposed, so that the goals of properly isolating the influence between probabilistic real-time tasks and lowering the calculation complexity of system schedulability analysis are achieved. According to the method, the pWCET of the probabilistic real-time tasks is shaped, and budget allocation is performed on the basis of the shaped pWCET, so that while the probabilistic real-time requirements of the tasks are met, the influence between the probabilistic real-time tasks can be properly isolated, and the schedulability ofthe whole task set is remarkably improved. In addition, the value of the shaped pWCET is obviously reduced compared with that of original pWCET; the calculation complexity of the schedulability analysis can be lowered; and the efficiency is remarkably improved.
Owner:DALIAN UNIV OF TECH
Roller-type cutting tool and method of medical folding mask
InactiveCN111409257AImprove flatnessAvoid wrinklesDomestic articlesMetal working apparatusEngineeringConveyor belt
The invention discloses a roller-type cutting tool and method of a medical folding mask, belonging to the technical field of medical folding mask cutting. The roller-type cutting tool of the medical folding mask comprises a support frame; a worktable is fixed on the support frame; a conveyor belt is arranged in the middle of the worktable; a guide device, a horizontal pressing fixing device and acutting device are arranged above the worktable; the horizontal pressing fixing device is arranged at the lateral end of the guide device; and the cutting device is arranged at the lateral end of thehorizontal pressing fixing device. The roller-type cutting tool and method of the medical folding mask disclosed by the invention shapes the material, which is convenient for subsequent cutting; two sets of cutting blades are arranged to cut two sets of materials at the same time, which improves the cutting efficiency, increases the production speed, and reduces the production costs; and the degree of compression between a butt roller and a cutting roller can be adjusted according to requirements, which increases the schedulability in production, reduces the wear of the blade while ensuring the quality of the produced product, increases the service life of the blade, facilitates replacement and maintenance, and avoids the occurrence of bad products produced due to blade aging and wear.
Owner:MAANSHAN HENGLIDA MACHINE BLADE
A coordinated control method for thermal power units based on condensate throttling
ActiveCN104932450BIncrease the variable load rateImprove schedulabilityProgramme total factory controlNew energyDeaerator
The present invention discloses a thermal power generating unit coordination control method based on condensate throttling which belongs to the thermal power generating unit coordination control technology field. The method comprises the steps of sending a unit load deviation to a master controller; using the master controller to send out a rotating speed change instruction, and changing the rotating speed of a condensate pump motor after an amplitude limit module; changing the unit load to form the condensate throttling control due to the condensate flow change; integrating the condensate flow variable quantity to obtain a water storage variable quantity delta Q in a deaerator, and obtaining the deaerator instant water level height hx corresponding to the delta Q by utilizing a dichotomy; forming the deviation of the hx and a deaerator water level setting height ho to sent to a slave controller, using the slave controller to generate a fuel quantity instruction signal to send to a coal mill to thereby influence the unit load and form the fuel quantity control, and recovering the deaerator water level to h0. The thermal power generating unit coordination control method based on the condensate throttling enables the changing load-acceleration of a coal-fired generating unit to be improved greatly, the schedulability of the coal-fired generating unit to be improved, and has great benefits for the new energy electric power large-scale grid connection of our country.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Multi-imaging satellite emergency task dynamic scheduling method
ActiveCN102867107BReduce the number of imagingNarrow solution spaceSpecial data processing applicationsSatelliteCompletion rate
Owner:NAT UNIV OF DEFENSE TECH
Centralized coordination control method of distributed power supply
InactiveCN110994655AImprove schedulabilityImprove stabilitySingle network parallel feeding arrangementsEnergy storageMicrogridControl engineering
The invention discloses a centralized coordination control method of a distributed power supply. The centralized coordination control method specifically comprises the following steps: acquiring a current charging state parameter of an energy storage unit in a microgrid system; comparing the obtained current charging state parameter of the energy storage unit with a charging state parameter set bythe microgrid system; and based on a comparison result, selecting an appropriate control strategy to carry out centralized coordination control on each distributed power supply in the microgrid system. By comparing the obtained current charging state parameter of the energy storage unit with the charging state parameter set by the microgrid system and switching the three control modes, the schedulability of the microgrid system is improved, and the charging balance of the energy storage unit is smoothly realized.
Owner:NARI NANJING CONTROL SYST +2
A fault-tolerant task scheduling method in virtualized cloud
ActiveCN104951367BImprove schedulabilityImprove resource utilizationProgram initiation/switchingVirtualizationFault tolerance
The invention discloses a fault-tolerant task scheduling method in a virtualized cloud, which is characterized in that the information of the arrived dependent task group and the physical host information of the virtualized cloud are obtained; the PB model is used to establish a master task for each task in the dependent task group version and minor version; specify an earliest start time and a latest completion time for each version of each task in the dependent task group; divide multiple virtual machines on each activated physical host, and obtain each The information of each virtual machine on the activated physical host; each version of each task in the dependent task group will be loaded to each activated virtual machine in the specified time period according to the distribution of tasks on each activated physical host In each virtual machine on the activated physical host; run each version of each task in the loaded dependent task group according to the specified time schedule; complete all tasks of the dependent task group and return the task result.
Owner:NAT UNIV OF DEFENSE TECH
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