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Exponential growth in electronic health record (EHR) data has resulted in new opportunities and urgent needs to discover meaningful data-driven representations and patterns of diseases, i.e., computational phenotyping. Recent success and development of deep learning provides promising solutions to the problem of prediction and feature discovery tasks, while lots of challenges still remain and prevent...
The rapid growth of Electronic Health Records (EHRs), as well as the accompanied opportunities in Data-Driven Healthcare (DDH), has been attracting widespread interests and attentions. Recent progress in the design and applications of deep learning methods has shown promising results and is forcing massive changes in healthcare academia and industry, but most of these methods rely on massive labeled...
As the air bearing flying height (a few nanometer levels) and the deformation of suspensions (micro-or millimeter level) run at two different scales, a dual-scale model for head disk interface (HDIs) has been proposed to analyze the unloading behavior of a subambient pressure slider. With the scheme developed, the unloading process can be simulated efficiently. The nonlinear vibrations of the air...
Aiming at the problem of steel grating flame cutting, the algorithm of coordinate compensation including the coordinate compensation of Z-axis and the coordinate compensation in the XY plane is proposed in this paper. Through the coordinate compensation of the Z-axis, the Z-axis can move up and down according to the height of the steel grating by controlling the servo motor of Z-axis to keep a constant...
In many industrial environments properly fit and functioning respirators are required to reduce individual's exposure to particulate matter. Respirator fits are evaluated prior to use by the Occupational Health and Safety (OSHA) fit testing protocol. However, this testing cannot ensure that the seal is maintained during actual use. The OSHA fit testing equipment and laboratory grade aerosol monitors...
Multi view technology is a hot spot in research of the current display, multiple viewpoints of freedom stereo display technology not only can let the viewer's feel lifelike three-dimensional effect, still can make the viewer from wearing the aid equipment trouble, which makes more and more colleges and universities, research institutes and companies engaged in multiple viewpoints freedom stereo display...
The ambiguity search space has a great effect on integer ambiguity searching efficiency and confirmation. In the case of high ambiguity dimension, the search space is determined when the ambiguity dimension is large. The conventional method is prone to the ambiguity fixed failure. And the actual ambiguity group number and the expected value of a large deviation by the conservative method, resulting...
In order to realize the rapid satellite selection of BDS / GPS dual-mode navigation system under the premise of satisfying the normal positioning accuracy, a new fast satellite selection algorithm is proposed. The algorithm combines the traditional satellite selection algorithm with genetic algorithm. The satellite area is divided by the elevation angles information of the visible satellite, according...
Photosynthesis is the basis of biological survival. Traditional methods are complicated, time consuming and destruction of the sample. Variable chlorophyll a fluorescence techniques provide a rapid, sensitive and non-invasive measurement of the photosynthetic physiology of algae. Based on this technique, an in situ measurement system of photosynthetic activity (Fv/Fm) was established, using blue LEDs...
In order to promote the popularization of BDS, the BDS / GPS dual-mode positioning is studied, and the pseudorange single point positioning algorithm of the dual-mode system is analyzed. On the basis of the least squares method, the weighted method is used to improve the accuracy of the positioning solution, and a fixed weight method combining the elevation angle model and posterior variance estimation...
This paper proposes a dual-band conformal antenna which resonates at lower WLAN (2.4 GHz) and high WLAN (5.8 GHz) frequency bands. And for both the bands, the conformal antenna has perfect omnidirectional radiation pattern. The proposed antenna is conformed onto a cylindrical structure of radius 200 mm. And the electromagnetic model and parametric analysis of the proposed antenna is developed in HFSS...
For comparing the stability and reliability of horizontal, vertical and flip LED chips, we carried on the high temperature and high current aging experiment towards to the three kinds of bare LED chips on our self-build online monitoring and accelerated life system. Most of samples shown stable performance during the entire experiment process, but there was only one flip LED chip whose illuminant,...
A robust hybrid tracking control scheme, which combines a computed torque control (CTC) method with a robust hybrid compensator, is proposed for nonholonomic mobile robot with parametric uncertainties and disturbances. CTC acts as the main controller to control the nominal model of the robot. The robust hybrid compensator consists of variable structure control (VSC) and H∞ optimal control approaches,...
Cities are densely populated, with concentrated tall buildings and convenient transportation, reflecting their prosperity and developments. In urban construction archives, the records of underground pipe is very important for practical engineering. However, in real engineering sites, the buried pipes sometimes has the different layout from the records. Therefore, the survey is often carried out before...
A kind of composite antenna with an artificial magnetic conductor ground is designed in this paper. This antenna consists of a 3×3 hexagonal annular gap artificial magnetic conductor unit cells and a rectangular patch antenna fed by coplanar waveguide. The in-phase reflection is suitable for the composite antenna. The distance between the patch antenna and the ground is 0.1λ at zero-phase reflection...
For high-dimensional magnetic resonance imaging (MRI) data, many feature selection methods have been proposed to reduce feature dimension in the study of computer-aided Alzheimer's disease (AD) diagnosis. This paper presents a compartmental sparse feature selection method used for AD identification. Based on the derived atlas-based regions-of-interest (ROIs) of brain, the proposed method partitioned...
Magnetic resonance imaging (MRI) has been successfully applied to investigate neuron pathological changes. Since the high dimension of observation data, sparse feature learning plays an important role in overcoming the challenge of high variable dimension and low sample size problem among the disease identification. In this paper, sparse Elastic Net (EN) was used to extract low dimension features...
Single feature of pedestrian is difficult to accurately describe the target using traditional algorithms. A new reidentification algorithm combing global features and local features with different distance metric function is introduced. First, weighted color histogram feature for whole pedestrian is extracted and combined with Bhattacharyya distance to roughly recognize targets. Then pedestrians’...
The rapid development of the Internet has brought great convenience to users, but it also brought a lot of troubles to the users' information privacy exposure. This study selects the basic information of 300 users on FACEBOOK social media to cluster analysis. The data sets of users are divided into five groups by experiment, and the clustering results are classified and then discussed. By the analysis...
Feature extraction is an important issue for image interpretation, many valuable feature extraction methods have been proposed to address synthetic aperture radar (SAR) image registration. However, the current methods care little about changes over multi-temporal SAR images, which result in unstable output features. The unstable property is a latent factor to affect the accuracy of SAR image registration...
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