Abstract. BACKGROUND: Nowadays, more and more traffic accidents occur because of driver fatigue. OBJECTIVE: In order to reduce and prevent it, in this study, a calculation method using PERCLOS (percentage of eye closure time) parameter characteristics based on machine vision was developed. It determined whether a driver's eyes were in a fatigue state according to the PERCLOS value. METHODS: The overall workflow solutions included face detection and tracking, detection and location of the human eye, human eye tracking, eye state recognition, and driver fatigue testing. The key aspects of the detection system incorporated the detection and location of human eyes and driver fatigue testing. The simplified method of measuring the PERCLOS value of the driver was to calculate the ratio of the eyes being open and closed with the total number of frames for a given period. RESULTS: If the eyes were closed more than the set threshold in the total number of frames, the system would alert the driver. CONCLUSION: Through many experiments, it was shown that besides the simple detection algorithm, the rapid computing speed, and the high detection and recognition accuracies of the system, the system was demonstrated to be in accord with the real-time requirements of a driver fatigue detection system.

Drawing on survey data, this paper examines the patterns and perceptions of technology use by primary EFL teachers in China. Findings suggest that although Chinese EFL teachers hold positive attitudes toward the value of technology for teaching and learning, they use technology mainly for teacher-centered purposes, such as teaching preparation and instructional delivery, and seldom utilize technology for student-centered activities. Factors constraining student-oriented technological use in early EFL instruction include teacher-center pedagogical practices and lack of effective professional development that focuses on instructional design and technology integration. These findings suggest that China must redirect its effort to promote teacher conceptual and pedagogical change in integrating technology in early EFL instruction and emphasize alignment among technology, curriculum, and pedagogy in EFL teaching.

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Despite the great potential technologies bring to TBLT, few studies have examined the effects of technology-enhanced TBLT curriculum on students’ language development, especially among young learners. This paper addresses this need by reporting the impact of a technology-enhanced TBLT curriculum on Chinese elementary students’ English as a Foreign Language (EFL) learning using a Non-equivalent Groups Design. A total of 471 fourth grade students from 4 low-SES schools outside Beijing participated in the study. Students’ growth in their English achievement was assessed using pre and post-tests before and after the intervention. A descriptive analysis was first conducted after completion of data collection, and then a t-test was conducted to determine the effect of the intervention. Results indicate that students who received the intervention progressed much more quickly in overall language proficiency than those who did not receive the treatment. The study points to the great potential of implementing comprehensive technology-enhanced TBLT at the curricular level.

Abstract. In order to provide a new way for dynamic simulation experiments, a real-time solution for the six degree of freedom platform was developed. The mathematical model of an improved Six-DOF Stewart platform was used to study positive solutions and inverse solutions. According to the parameters of different platforms, different function signals were selected to generate motion control data by using Visual C++ programming. Motion control card was embedded into industrial computer, data was sent automatically to the control card by the program when the platform ran. The output of the control card was analog voltage, and it was amplified to send to the proportional valve, then the flows of six hydraulic cylinders were controlled by the six proportional valves. So a closed-loop control CNC system was formed The expected action could be realized by the platform. Experiments have proved that the method is simple, efficient and easy to operate. It can not only accompany the implementation moving of relevant actions in the 3D movie theater, but also provide the signal source for the road spectrum of simulated driving test of the automobile.