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40results about How to "Reduce revisions" patented technology

Cascade power station mid-downstream power station warehouse-in flow prediction method

The invention discloses a cascade power station mid-downstream power station warehouse-in flow prediction method. The method comprises the steps of selecting variable data having relatively strong correlation with the warehousing flow of the downstream power station; standardizing the data; selecting a data subset proportion alpha range, training a locally weighted linear regression model for different alpha values by adopting cross validation to obtain an error sequence, and calculating a root mean square error RMSE; selecting an alpha value enabling the RMSE to be minimum as an optimal subset proportion value; applying the optimal alpha value to local weighted linear regression to obtain a fitting value sequence of training data and a prediction value y1 of a prediction day; establishingan ARIMA (p, d, q) model for the fitting error of the training data; predicting by using a trained ARIMA model to obtain a predicted value y2; and carrying out inverse standardization processing on y1 + y2 to obtain the reservoir inflow estimated value of the downstream power station of the prediction day. The method can improve the prediction precision of the downstream power station warehouse-in flow and the accuracy of daily output plan making, reduces the number of times of power generation plan modification, and plays a certain positive role in guaranteeing the safe and stable operationof the power station.
Owner:CHINA YANGTZE POWER

Physical simulation method and system based on digital twin for production line

ActiveCN111338300BChange the relatively independent situationRealize virtual and real linkageTotal factory controlProgramme total factory controlProduction lineDynamic models
The physical simulation method and system based on the digital twin of the production line, the physical simulation method includes: determining the layout strategy of the production line; based on the pre-constructed general digital twin model, customizing the digital twin model of the production equipment; real-time interaction between the production equipment and the virtual model; At the same time, test and joint debugging the configuration of the production line; analyze the test and joint debugging results, obtain the defects and simulation of the production line; modify the virtual dynamic model; repeat until the best result is optimized; its system includes: analysis module, production equipment , planning module, physical simulation module, simulation classification module, virtual connection module and model modification module. On the basis of realizing virtual-real linkage, the present invention jointly debugs the physical entity and the virtual model of the production line, so as to comprehensively consider the uncertain factors of the equipment, so that the test results can better guide the modification of the simulation model, reduce the number of model modifications, and shorten the design time. Better design results can be obtained under the premise of cycle.
Owner:GUANGDONG UNIV OF TECH

Method and system for realizing Chinese phonetic input on electronic equipment based on remote controller

The invention relates to a method and a system for realizing Chinese phonetic input on electronic equipment based on a remote controller. The method comprises the following steps of inputting an initial phonetic alphabet through a first-stage keyboard, and switching the first-stage keyboard into a corresponding first secondary auxiliary keyboard according to the input initial phonetic alphabet; inputting a next phonetic alphabet through the first secondary auxiliary keyboard; judging whether remaining phonetic alphabets exist grammatically; if the remaining phonetic alphabets do not exist, selecting corresponding candidate words; if the remaining phonetic alphabets exist, switching the first-stage keyboard into a corresponding second secondary auxiliary keyboard according to the input phonetic alphabet, and inputting a next phonetic alphabet through the second secondary auxiliary keyboard. The system comprises a first phonetic alphabet input module, a switching module and a remaining phonetic alphabet input module. The method and the system for realizing the Chinese phonetic input on the electronic equipment based on the remote controller accord with Chinese phonetic input habits, the system is user-friendly, the Chinese phonetic input speed is increased, and the application range is wide.
Owner:LIANTONG NETWORK COMM TECH INC

Method for enhancing low temperature impact toughness of steel plate applied to railway

The invention provides a method for enhancing low temperature impact toughness of a steel plate applied to a railway. The method aims at the steel plate applied to a railway, wherein the steel plate is not added with a lot of alloy elements and a carbon equivalent of a composition system is kept lower than 0.45. Under nitrogen protection, heating is conducted with a radiant tube, medium-temperature tempering is conducted on the steel plate, and surface oxidation of the steel plate is avoided; through accurate control of tempering technological parameters such as a furnace temperature, a temperature rise rate and thermal preservation time, the steel plate can be heated uniformly, and non-carbide forming elements can be gradually enriched and nodulized, so former unstable carbides can be gradually replaced by more stable carbides; homogeneity of organizational properties is ensured; and stability of the organizational structure is effectively enhanced. In this way, low temperature impacttoughness of a rolled-state delivery thick plate can be effectively enhanced; a performance percent-of-pass index is increased; an amendment amount of steel plates caused by nonconforming performancecan be reduced; and cost control in batched production can be guaranteed.
Owner:NANJING IRON & STEEL CO LTD

Global flow level network simulation method, system and device

PendingCN114492052AVersatile for simulationLimited reliabilityCAD network environmentDesign optimisation/simulationTime informationCompletion time
The invention discloses a global flow level network simulation method, system and device, and the method comprises the steps: constructing a global simulation network topology architecture to form a simulation environment, generating a simulation task through a task generator, dividing the simulation task into a plurality of stages, and storing each stage of the simulation task into a global variable for global call; the method comprises the following steps: continuously updating time information transmitted by flow objects in a global simulation network topology architecture through a global refreshing strategy, determining a flow event of which the time is shortest for each global flow object, and after the current flow object completes the flow event, calculating flow event completion time expected values of other flow objects through refreshing; global stage information is obtained through a global control strategy, whether all flow objects in a certain stage complete flow events or not is detected, so that the end of the stage of the simulation task is predicted, and a test result of the simulation task is obtained. According to the network simulation scheme provided by the invention, the resource consumption is reduced, the calculation time is shortened, and meanwhile, the simulation correctness is ensured.
Owner:SHANGHAI JIAO TONG UNIV
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