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626results about How to "Increase sample size" patented technology

Method for obtaining resident travel characteristic parameter based on mobile phone positioning data

The invention discloses a method for obtaining a resident travel characteristic parameter based on mobile phone positioning data. The method comprises the following steps of: (1) collecting mobile phone positioning data; (2) filtering the mobile phone positioning data, matching the mobile phone positioning data to traffic zones, and obtaining the matched mobile phone positioning data; (3) using users as units, ordering the matched mobile phone positioning data in one day by time, merging the continuous data in the same one traffic zone into one piece, and obtaining mobile phone positioning pretreatment data; (4) according to the number of emerged pieces and influence duration, judging residing points, restoring a travel path between two residing points, and obtaining the travel distance and the travel speed, and then obtaining a travel log table of all users; (5) on the basis of the matched mobile phone positioning data, statistically obtaining a place of residence and workplace result table; and (6) and conjointly analyzing the travel log table and the place of residence and workplace result table, and obtaining resident travel characteristic parameters. The method has the characteristics of low cost, large sample quantity, high precision and high time validity.
Owner:北京交通发展研究院

A face multi-area fusion expression recognition method based on depth learning

The invention discloses a face multi-area fusion expression recognition method based on depth learning, which comprises the following steps of detecting a face position with a detection model; obtaining the coordinates of the key points by using the key point model; aligning the eyes according to the key points of the eyes, then aligning the face according to the coordinates of the key points of the whole face, and clipping the face region by affine transformation; cutting the eye and mouth areas of the image to a certain proportion; dividing the convolution neural network into one backbone network and two branch networks; carrying out the feature fusion in the last convolution layer, and finally obtaining the expression classification results by the classifier. The method of the inventionutilizes the priori information, besides the whole face, the eyes and mouth regions are also used as the input of the network, and the network can learn the whole semantic features of facial expressions and the local features of facial expressions through model fusion, so that the method simplifies the difficulty of facial expression recognition, reduces the external noise, and has strong robustness, high accuracy, low complexity of the algorithm and so on.
Owner:SOUTH CHINA UNIV OF TECH

Weak supervised text classification method and device based on active learning

The invention discloses a weak supervised text classification method and device based on active learning. The method comprises steps of firstly, extracting a first sample serving as a cluster center of a sample cluster from an unlabeled sample set; forming an initial training set based on the first samples, training a reference model by using the initial training set to obtain an initial classification model, and forming the initial training set by using the first samples, thereby not only reducing the number of training samples, but also ensuring the accuracy of the classification model at the initial stage; repeatedly utilizing the classification model to obtain the initial classification and confidence coefficient of the remaining samples in the sample set, so that manual labeling is not needed; extracting a second sample from the remaining samples according to the confidence coefficient, and performing data enhancement processing on the second sample to update the training set, thereby improving the generalization capability and robustness of the model; and finally, training the classification model by using the updated target training set until the classification model meets apreset condition, thereby realizing multi-round active training of the classification model.
Owner:安徽省泰岳祥升软件有限公司

Aircraft structure safe life determining method based on testing and serving use data fusion

The invention discloses an aircraft structure safe life determining method based on testing and serving use data fusion. The aircraft structure safe life determining method includes an air fleet safe life determining method when testing fatigue life data and serving use fatigue life data of same-type aircrafts under different load spectrums are in lognormal distribution, and an air fleet safe life determining method of the same-type aircrafts under the same testing load spectrum. The air fleet safe life determining method when the testing fatigue life data and the serving use fatigue life data of the same-type aircrafts under the different load spectrums are in lognormal distribution includes the steps of obtaining the fatigue life data of any right truncation tail of each aircraft structure, calculating fatigue life distribution function parameters of the aircraft structures, and calculating the fatigue life dispersion coefficients and the safe life of an aircraft air fleet. The air fleet safe life determining method of the same-type aircrafts under the same testing load spectrum includes the steps of calculating fatigue damage values, equivalent flight hours or rising and falling times of the serving aircraft structures, obtaining the fatigue life data of any right truncation tail of each aircraft structure, calculating fatigue life distribution function parameters of the aircraft structures, and calculating the fatigue dispersion coefficients and the safe life of the aircraft air fleet.
Owner:何宇廷

Method and system for time-delay path planning

Relating to the technical field of intelligent traffic, the invention provides a method and system for time-delay path planning. The method includes: acquiring the personalized information recorded by each client in real time; converting the personalized information recorded by each client into semantic information, and extracting mobile pre-judgement information of users according to the semantic information; forecasting the traffic information of each road section in each period of time according to the mobile pre-judgement information of all the users; planning an initial path to a destination in a specific period of time by a current client according to the traffic information of each road section in each period of time and the individualized information of itself; and in the driving process, adjusting the initial path in real time according to the traffic information obtained by continuous forecast. The method and the system provided by the invention has the characteristics of large data sample size, wide data range and data timeliness, can reduce the prediction result deviation, and can more comprehensively, more accurately and more timely forecast the driving road section with good traffic conditions within certain period of time in the future for users, thus enhancing the accuracy of path forecast and adjustment.
Owner:BEIJING SOGOU INFORMATION SERVICE +1
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