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The purpose of this study is to determine the sleep status of college students. 12 volunteers(mean ± SE: 22 ± 2 yr, 170 ± 10cm, 61 ± 16 kg) take part in the research. The sleep situation are got by the waistband sleep monitor system. The average heart rate of the whole night, the average breath rate of the whole night, bed time, get up time, onset latency, total sleep time are monitored. These important...
This paper aims to classify normal/abnormal heart sound signals from PhysioNet/CinC challenge 2016. The heart sound signals are segmented into four states, i.e., the first heart sound, systolic interval, the second heart sound, and diastolic interval. Multi-features are extracted from time domain, frequency domain and entropy, which are formed into three features sets. The first features set includes...
In this paper, a fourth-order V-band substrate integrated waveguide (SIW) filter is presented. The design of this filter is based on high-order mode coupling. By adding two different over mode cavity coupling, two transmission zeros are generated at both side of the passband to get better out-of-band suppression. As demonstrations, the filter was processed using a RT / Duroid 5880 dielectric plate...
Nonlinear dynamic inversion (NDI) has been applied to the control law design of UAVs for many years mainly due to its good robustness. However, it has a weakness of relying on accurate model of the plant greatly, which restrains its application since UAVs are easy to be influenced by persistent disturbances such as model uncertainties, winds and gusts; thus, development of accurate model for attitude...
This paper proposes an initial alignment approach for strapdown inertial navigation system with external information from Doppler velocity logs, aimed at improving navigated accuracy. Based on kalman filtering theory, we make an analysis comparison between two different error models according to simulation results. Then, we respectively discuss the effects that measured velocity errors, height channel...
Coin recognition is one of the prime important activities for modern banking and currency processing systems in which machine vision is widely used. The technique at the heart of such systems is object recognition in a digital image. Although it has high recognition speed, the traditional method of coin recognition can not recognize the coins with similar sizes. This paper presents a method based...
Urban function zoning is of great importance for urban structure optimization, urban resource allocation, and urban development planning. Since citizens usually act as a network of motion sensors of the city, their activities could reflect the environment around them. We considered taking advantage of VGI data to classify urban function zones. In this paper, we proposed a framework for automated urban...
Using sliding mode control algorithm with the exponential reaching law, in this paper, a new semi-active control strategy is presented for space grid structures installed with magnetorheological (MR) dampers. The real semi-active control force is obtained based on the computed control force and the maximum control force ofthe MR damper. A structural model of one-story space grid structure subjected...
This study aimed to employ the recently developed fuzzy measure entropy (FuzzyMEn) method to compare the difference in heart rate variability (HRV) between rest and exercise states in hypoxic environment. Four healthy male volunteers were enrolled in this study. For each subject, electrocardiography (ECG) and finger pulse were recorded in ten days to obtain the heart rate (HR) time series. For each...
LAMOST is an innovative active reflecting Schmidt telescope in combining a large aperture with a wide field of view, and releasing more than 5,000,000 spectra in DR3. A considerable part of the low SNR spectra are not released or measured parameters, some of these can improve the SNR by the method of spectra stacking. Firstly, targets are selected whose distances of latitude or longitude are less...
We compared two different cosmic ray location algorithms—Laplace and GUO methods. They are useful for a two-dimensional optical fiber to position on the cosmic ray spectrum image. Removing the cosmic rays belongs to the category of the pretreatment. The pretreatment method for two-dimensional optical fiber spectral image is important, it effects the subsequent stellar spectral processing. Cosmic ray...
Spectrum extraction plays a crucial role in two-dimensional spectrum data processing. One of the most important spectrum extraction methods is profile fitting algorithm. In this article we studied the spectrum profile fitting method of non-Gaussian model. The general solution methods always have poor adaptability and some limitation, in order to approximate spectral profiles better, we introduced...
In this paper, we address the problem of natural flower classification. It is a challenging task due to the non-rigid deformation, illumination changes, and inter-class similarity. We build a large dataset of flower images in the wide with 79 categories and propose a novel framework based on convolutional neural network (CNN) to solve this problem. Unlike other methods using hand-crafted visual features,...
An eight-class SSVEP-based BCI system was designed and demonstrated in this study. To minimize the complexity of the traditional equipment and operation, only one work electrode was used. The work electrode was fabricated in our laboratory and designed as a claw-like structure with a diameter of 15 mm, featuring 8 small fingers of 4mm length and 2 mm diameter, and the weight was only 0.1g. The structure...
Interactive learning in class or off-class is crucial to teaching and learning. In this paper, we propose an intelligent learning system for supporting student interactive learning through engagement study, which is based on three modules, i.e., attendance management, teacher-student (T&S) communication, visual focus of attention(VFOA) recognition. Attendance management matches the student's identity...
A novel kind of optrode fabricated on a sapphire substrate is proposed for optogenetic applications in neuroscience. Eight thin-film neural electrodes and a GaN-LED are monolithically integrated on the surface of a sapphire shank. The LED is used for optogenetic stimulation and the multiple electrodes are used for simultaneous recording of neural activities. The output power density of the LED is...
Battery management system has a very extensive application field. This paper introduces an online system which is available for monitoring electric current, voltage and temperature of power battery group simultaneously. This system adopts the microcontroller and PC as the main controllers, collects the information like voltage, current and temperature of the battery with battery information collection...
For purpose of information management of film capacitor production workshop to provide convenience for production department management to grasp the production realtime data, in this paper, we design a film capacitor production monitoring system adopting the man-machine interactive information collection technology based on data acquisition and wireless network transmission. By the technology, we...
Because of the interference of angular and linear vibration in-moving initial alignment, information of the gravity and rotational angular velocity of the earth can't be separated from the measurement of the gyros and accelerometers to calculate the attitude. With the information of position from GPS, this paper takes inertial frame as computing reference to guarantee the accuracy of initial alignment...
Taiyuan graben basin has been suffering serious ground deformation due to the combined effects of groundwater pumping, ground fissures and faults. However, most ground deformation monitoring mainly focus on the single city, thus it is difficult to reveal the regional extent of the deformation. Fifty-five ALOS/PALSAR images acquired from three adjacent tracks from 2007 to 2011 are used to obtain annual...
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