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2165 results about "Artificial neuronal network" patented technology

An artificial neural network is an attempt to simulate the network of neurons that make up a human brain so that the computer will be able to learn things and make decisions in a humanlike manner. ANNs are created by programming regular computers to behave as though they are interconnected brain cells.

Method for automatic recognition and stage compression of medical image regions of interest based on artificial neural network

The invention relates to a method for automatic recognition and stage compression of medical image regions of interest based on an artificial neural network. Medical image files in a digital diagnostic system are generally larger, and due to the limitation by factors of bandwidth and the like, the transmission speed is low, the effect is not good, and the diagnosis quality is influenced. By the method, medical digital images are subjected to noise elimination, the tissue outline of a human body is recognized, tissue images are subjected to multiple times of overlay operation, image features of the regions of interest are strengthened, feature values are extracted, classification is performed by using an artificial neural network method, the regions of interest and corresponding levels are determined, and tagged image file format (TIFF) images are generated in different compression modes according to different levels of the regions of interest and non-regions of interest. By the method, the medical image files are greatly lessened, the transmission speed is increased, and effective necessary information used for diagnosis and treatment in the images is kept, so the method facilitates the reading of doctors, and can be applied to the digital diagnostic system and a remote medical system, and improve the diagnosis and treatment efficiency and effect.
Owner:BAILEAD TECH CO LTD

Network constructing method for human face identification, identification method and system

The invention discloses a deeper layer network constructing method used for gender identification or age estimation based on human face. The method includes a step (101) dividing all training pictures into a plurality of groups; (102) extracting high layer features of a group of pictures based on a convolution neural network and thereby obtaining a first matrix composed of the high layer feature vectors, and extracting low layer and global features of the same group of the training images based on an artificial neural network and thereby obtaining a second matrix composed of the low layer feature vectors, obtaining a group of gender identification or age estimation results based on the extract first matrix, the second matrix and the defined judgment formula, wherein the values of a first weight matrix W1, a second weight matrix w2, an offset matrix b and an adjusting weight beta in the defined judgment formula are updated by utilizing an error back propagation algorithm and the final values of the parameters are obtained and the network construction is completed. Judgment of age and gender of a human face is performed based on the judgment formula determined according to the values of the parameters when the network construction is completed.
Owner:HENGFENG INFORMATION TECH CO LTD

Performance of artificial neural network models in the presence of instrumental noise and measurement errors

A method is described for improving the prediction accuracy and generalization performance of artificial neural network models in presence of input-output example data containing instrumental noise and / or measurement errors, the presence of noise and / or errors in the input-output example data used for training the network models create difficulties in learning accurately the nonlinear relationships existing between the inputs and the outputs, to effectively learn the noisy relationships, the methodology envisages creation of a large-sized noise-superimposed sample input-output dataset using computer simulations, here, a specific amount of Gaussian noise is added to each input / output variable in the example set and the enlarged sample data set created thereby is used as the training set for constructing the artificial neural network model, the amount of noise to be added is specific to an input / output variable and its optimal value is determined using a stochastic search and optimization technique, namely, genetic algorithms, the network trained on the noise-superimposed enlarged training set shows significant improvements in its prediction accuracy and generalization performance, the invented methodology is illustrated by its successful application to the example data comprising instrumental errors and / or measurement noise from an industrial polymerization reactor and a continuous stirred tank reactor (CSTR).
Owner:COUNCIL OF SCI & IND RES

Method for Training Neural Networks

The present invention provides a method (30) for training an artificial neural network (NN). The method (30) includes the steps of: initialising the NN by selecting an output of the NN to be trained and connecting an output neuron of the NN to input neuron(s) in an input layer of the NN for the selected output; preparing a data set to be learnt by the NN; and, applying the prepared data set to the NN to be learnt by applying an input vector of the prepared data set to the first hidden layer of the NN, or the output layer of the NN if the NN has no hidden layer(s), and determining whether at least one neuron for the selected output in each layer of the NN can learn to produce the associated output for the input vector. If none of the neurons in a layer of the NN can learn to produce the associated output for the input vector, then a new neuron is added to that layer to learn the associated output which could not be learnt by any other neuron in that layer. The new neuron has its output connected to all neurons in next layer that are relevant to the output being trained. If an output neuron cannot learn the input vector, then another neuron is added to the same layer as the current output neuron and all inputs are connected directly to it. This neuron learns the input the old output could not learn. An additional neuron is added to the next layer. The inputs to this neuron are the old output of the NN, and the newly added neuron to that layer.
Owner:GARNER BERNADETTE

Short-time wind speed forecasting method based on neural network

InactiveCN101788692AGood trend forecasting effectPseudo-periodicWeather condition predictionBiological neural network modelsMoving averageOriginal data
The invention discloses a short-time wind speed forecasting method based on a neural network. The method comprises the following steps of: (1) recording the moving average observing values of the wind speed, wind direction, temperature and air pressure on the same district once at the interval of 10 minutes, and ordering the observed data in a time sequence from front to back to obtain original wind speed data; (2) calculating the data of the adjacent time according to the time sequence, and generating an original wind speed added value sequence; (3) entering the original airspeed added value into a BP artificial neural network to construct a wind speed added value neural network model, calculating and counting an original wind speed added value tendency by utilizing the BP artificial neural network, training a RP artificial neural network by respectively utilizing the original wind speed added value and the original wind speed added value tendency as the original data, and obtaining a wind speed added value predicting value and a wind speed added value error tendency; (4) adding the wind speed added value predicting value into statistical noise to reduce and generate a wind speed predicting value; (5) carrying out moving filtering on the wind speed predicting value; and (6) obtaining the wind speed predicting value 4 hours in advance.
Owner:NORTHWEST CHINA GRID

Predication method for three-dimensional dose distribution in intensity modulated radiation therapy plan and application of predication method

ActiveCN107441637AThoroughly describe anatomical featuresDescribe anatomical featuresX-ray/gamma-ray/particle-irradiation therapyVoxelImage resolution
The invention discloses a predication method for three-dimensional dose distribution in intensity modulated radiation therapy plans. The method includes steps of (1) collecting valid intensity modulated radiation therapy plan data and forming a case database; (2) dividing a PTV and different to-be-endangered organs of patients into a plurality of voxels according to the resolution ratio of CT images; (3) extracting anatomical characteristics of each patient in the database; (4) extracting dose characteristics of each patient in the database; (5) constructing an artificial neural network, inputting the anatomical characteristics and the dose characteristics of the patients, and learning the mapping relation between the anatomical characteristics and the dose characteristics by the aid of the artificial neural network, and obtaining a correlation model of the anatomical characteristics and the dose characteristics; (6) using the correlation model to predicate the three-dimensional dose distribution of a new patient. The application of said method is using the dose distribution predication method for dose prediction for to-be-endangered organs of patients and quality control is achieved. By adopting the above method, predication of three-dimensional dose distribution in intensity modulated radiation therapy plans can be realized and the method can be applied to a quality control link.
Owner:SOUTHERN MEDICAL UNIVERSITY
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