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EEG-based Safety Driving Performance Estimation and Alertness Using Support Vector Machine
Hongyu Sun,Lijun Bi,Bisheng Chen,Yinjing Guo 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.6
Safety driving performance estimation and alertness (SDPEA) has drawn the attention of researchers in preventing traffic accidents caused by drowsiness while driving. Psychophysiological measures, such as electroencephalogram (EEG), are accurately investigated to be robust candidates for drivers’ drowsiness evaluation. This paper presents an effective EEG-based driver drowsiness monitoring system by analyzing the changes of brain activities in a simulator driving environment. The proposed SDPEA system can translate EEG signals into drowsiness level. Firstly, Independent component analysis (ICA) is performed on EEG data to remove artifacts. Then, eight EEG-band powers- related features: beta, alpha, theta, delta, (alpha plus theta)/beta, alpha / beta, (alpha plus theta)/(alpha plus beta) and theta / beta are extracted from the preprocessed EEG signals by employing the Fast Fourier Transform (FFT). Subsequently, fisher score technique selects the most descriptive features for further classification. Finally, Support Vector Machine (SVM) is employed as a classifier to distinguish drowsiness level. Experimental results show that the quantitative driving performance can be correctly estimated through analyzing driver’s EEG signals by the SDPEA system.
An LDPC-COFDM based High Speed Mobile Wireless Communication System
Hongyu Sun,Lijun Bi,Xiang Lu,Yinjing Guo 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.12
Coded Orthogonal Frequency Division Multiplexing (COFDM) is very well matched to the terrestrial channel, being able to cope with severe multi-path and the presence of co-channel narrowband interference. This paper presents an image and video transmission scheme based on COFDM for high speed mobile wireless communication system in which a good Rate-Compatible Low-Density Parity-Check codes structure is applied, this structure can provide a large range of supporting rates, and provide very good error performance, low decoding latency and low computational complexity at the decoder. The test experiment was made in television live transmitting to validate the designed system. The results show that our COFDM-based mobile wireless digital multimedia broadcasting system can transmit high definition image and video when it being equipped for 486Kilometre/Hour’s high speed rail, The Channel Bit Error Rate <2.0E-4 and Carrier to noise ratio(C/N) >30dB when the output power at 30dBm.
Sun, Shuai,Li, Liang,Wang, Chao,Zhang, Hongyu The Society of Naval Architects of Korea 2018 International Journal of Naval Architecture and Oc Vol.10 No.1
In order to analyze the characteristics of propeller exciting force, the hybrid grid is adopted and the numerical prediction of KCS ship model is performed for hull-propeller-rudder system by Reynolds-Averaged Navier Stokes (RANS) method and volume of fluid (VOF) model. Firstly, the numerical simulation of hydrodynamics for bare hull at oblique state is carried out. The results show that with the increasing of the drift angle, the coefficients of resistance, side force and yaw moment are constantly increasing, and the bigger the drift angle, the worse the overall uniformity of propeller disk. Then, propeller bearing force for hull-propeller-rudder system in oblique flow is calculated. It is found that the propeller thrust and torque fluctuation coefficient peak in drift angle are greater than that in straight line navigation, and the negative drift angle is greater than the positive. The fluctuation peak variation law of coefficient of side force and bending moment are different due to various causes.
Sun Yan,Zhu Hongyu,Esmaeili Elham,Tang Xue,Wu Zhilin 대한마취통증의학회 2023 Korean Journal of Anesthesiology Vol.76 No.2
Responses to sedatives, analgesics and muscle relaxants vary among patients under general anesthesia, which could be ascribed to the disparities of clinical characteristics and genetic factors of individuals. Accumulating researches have indicated that gene polymorphisms of the receptors, transporters and metabolizing enzymes associated with anesthetics play a considerable role in their efficacy. However, a systematically summarized study on the mechanisms of gene polymorphisms on pharmacodynamics and pharmacokinetics of anesthetics is still lacking. In this paper, the recent researches on pharmacogenomics of sedatives, analgesics and muscle relaxants are comprehensively reviewed, and the contributions and mechanisms of polymorphisms to the differences of individual efficacy of these drugs are discussed, so as to provide guidance for the formulation of a rational anesthesia regimen for patients with various genotypes.