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105results about How to "Easy to apply" patented technology

River water temperature prediction method based on LSTM deep learning

PendingCN112116147AImprove the accuracy of water temperature predictionEasy to applyForecastingCharacter and pattern recognitionAtmospheric sciencesRiver water temperature
The invention discloses a river water temperature prediction method based on LSTM deep learning, and belongs to the technical field of hydrological models, and the method comprises the steps: collecting the historical day-by-day temperature, flow and water temperature data of a certain river; dividing the time sequence into a training set and a test set, and performing regularization processing onthe data; constructing a water temperature prediction model based on a long short-term memory (LSTM) neural network by taking the air temperature and the flow as input factors and taking the water temperature as an output factor based on the training set data; inputting the test set air temperature and flow into the trained model, and obtaining a test set water temperature prediction result through inverse regularization processing; and comparing a water temperature prediction value and an observation value of the test set, and verifying the rationality of the model by taking a mean absoluteerror MAE, a root-mean-square error RMSE, a Nash-Sutcliffe efficiency coefficient NSE and a determination coefficient R2 as test standards. The river water temperature prediction method is high in precision and reliable in result, has superiority compared with an existing machine learning river water temperature prediction method, and provides scientific support for river ecosystem management andprotection.
Owner:NANJING UNIV

Nuisanceless organic fertilizer prepared from edible fungus slag, preparation method thereof and application thereof

ActiveCN102206118AImprove utilization and effectivenessEasy to applyFertiliser formsFertilizer mixturesNutrientHumic acid
The invention relates to an organic fertilizer prepared from edible fungus slag, a preparation method thereof and an application thereof. The edible fungus slag organic fertilizer comprises, by weight, 45 to 70 parts of edible fungus slag, 5 to 20 parts of weathered coal, 4 to 15 parts of urea, 10 to 15 parts of monoammonium phosphate, 7 to 20 parts of potassium chloride, 1 to 5 parts of a trace element fertilizer, 1 to 5 parts of a chemical degradant, and 5 to 10 parts of a curing agent. The preparation method comprises the following steps: shearing and crushing the edible fungus slag; adding other components and mixing; degrading and solidifying; and obtaining circular particles through extruding to pelletize, and polishing and reshaping. The edible fungus slag organic fertilizer, whichcontains various amino acids, humic acid, nitrogen, phosphor, potassium and trace elements which are required by the growth of crops, allows a humic acid chelate which is formed through a chelation reaction and contains the trace elements which can be easily absorbed by plants to be generated, the utilization rate of the nutrients of the fungus slag organic fertilizer to be improved and the application to be convenient and labor saving, and can be used for industrial crops such as grains, vegetables, fruits and the like.
Owner:INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI

Starting test system for simulating ditch bed deposits under disturbance of upstream debris flow

ActiveCN105628896AEasy to applyEnvironmental requirements are relaxedEarth material testingDitchEngineering
The invention provides a starting test system for simulating ditch bed deposits under disturbance of upstream debris flow. The starting test system comprises a source tank, an artificial rainfall simulating device, an upstream debris flow migration simulating device, a cross plate head shear rheometer, a multi-physical-parameter monitoring system and a measurement and control system. The artificial rainfall simulating device is arranged above the source tank, the upstream debris flow migration simulating device is arranged on the upper portion of the source tank, the cross plate head shear rheometer is connected into the source tank, the multi-physical-parameter monitoring system is arranged in the source tank, and the measurement and control system is connected with the artificial rainfall simulating device, the upstream debris flow migration simulating device, the cross plate head shear rheometer and the multi-physical-parameter monitoring system. The starting test system for simulating the ditch bed deposits under the disturbance of the upstream debris flow has the advantages that starting effects and mechanisms of the ditch bed deposits under the disturbance of the upstream debris flow can be accurately simulated, and accordingly on-way erosion phenomena in debris flow disaster formation procedures can be revealed.
Owner:TSINGHUA UNIV

Robot trajectory planning optimal control method based on obstacle size homotopy strategy

ActiveCN111267110AStrong feasibility and operabilityEasy to applyProgramme-controlled manipulatorTrajectory planningWorking environment
The invention discloses a robot trajectory planning optimal control method based on an obstacle size homotopy strategy. The robot trajectory planning optimal control method based on the obstacle sizehomotopy strategy comprises the following steps that firstly, a motion equation and constraint conditions are established according to the structural characteristics of a robot, and a feature circle is used for describing the contour of the robot; secondly, according to obstacle information in the working environment, a feature circle is used for describing obstacles, a safety distance is set, andobstacle avoidance conditions in the working process are established; thirdly, initial and terminal boundary conditions corresponding to a robot trajectory planning problem are determined; fourth, the trajectory planning problem is converted to a optimal control problem with minimized energy consumption; and finally, the constructed optimal control problem is converted to a series of sub-problems, the size of one obstacle in each sub-problem continues to increase compared to the previous sub-problem, and the solution of the current sub-problem is used as the initial guess of the next sub-problem. According to the robot trajectory planning optimal control method based on the obstacle size homotopy strategy, the obstacle size homotopy strategy is used to achieve the efficient and stable solution of the robot point-to-point trajectory planning problem in the complex working environment, and the great significance is achieved for trajectory planning problem faced in the actual work of therobot.
Owner:DALIAN UNIV OF TECH

Flexible reflection type cholesteric liquid crystal display and preparation method thereof

The invention belongs to the technical field of flexible displays and particularly relates to a flexible reflection type cholesteric liquid crystal display and a preparation method thereof. The method comprises the steps of determining conditions for controlling cholesteric liquid crystal screw pitches to form target red wavelengths, target green wavelengths and target blue wavelengths; coating a conducting layer on a first layer flexible substrate, enabling at least one pixel jointly composed of reflection red liquid crystal, reflection green liquid crystal and reflection blue liquid crystal to be formed on a second layer, and enabling part of the reflection red liquid crystal, the reflection green liquid crystal and the reflection blue liquid crystal to be designated parts, to be separated from each other and not to interfere with each other. The cholesteric liquid crystal with target blue wavelength screw pitches reflects blue, the cholesteric liquid crystal with target green wavelength screw pitches reflects green, and the cholesteric liquid crystal with target red wavelength screw pitches reflects red. Liquid crystal molecules are fixed in a designated area of the flexible substrate in a spray coating mode. The preparation method is simple and convenient to apply and can improve production efficiency and reduce processing cost.
Owner:FUDAN UNIV
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