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This paper focus on the stress assessment by electroencephalograph(EEG) analysis. The KC complexity, Approximate Entropy and Wavelet Entropy were extracted and analyzed of the EEG data as the features of stress state. The game "Fruit Ninja" was selected as the stress stimuli, and 92 groups EEG data that from eight subjects were collected. Then, the features were fused by the Optimal Support...
Under the environment of big data, efficiency is low and there are many candidates when the traditional serial Apriori algorithm in dealing with massive data. This paper proposes a parallel better algorithm based on MapReduce distributed architecture. Based on the basic Apriori algorithm on MapReduce, this paper makes a reconstruction of the original transaction database, and implements parallel in...
In order to solve the unstable problem of conventional methods for measuring resonant frequency of quartz crystal, a method based on DDS (Direct Digital Synthesis) and real-time peak searching is proposed to increase stability of measurement. By actively generating excitation signal using DDS, the response of quartz crystal can be obtained even under heavy load. Frequency response of impedance is...
With the rapid development of Web and the rapid expansion of text information, how to effectively organize and manage these information is a great challenge for the current information science. Text automatic classification technology can effectively organize a large number of texts and help people to improve the efficiency of information retrieval. It has become one of the most important research...
With the rapid development of ground mobile communication, it has obtained rich frequency resources, and the corresponding technology is mature and reliable. Considering the future development of the International Space Station (ISS), the demand of wireless communication would increase, while the frequency resources are rare. This paper proposes the ISS space-to-space communication system by multiplexing...
Aiming at the needs for high-speed and high-quality weaving in modern textile industry, a weft feeder electronic control system based on STM32 was designed and implemented. In order to improve the weft feeding rate and the smoothness of motor, this paper proposed a control scheme that adapting permanent magnet synchronous motor (PMSM) by low resolution hall position sensor with field oriented control...
The straight light path type OCTs feature simple optical paths and high reliability, but are vulnerable to interference from the external magnetic field. In this paper, the method of Jones matrix is adopted to establish the sensing models of the straight light path type OCTs for analyzing their sensing characteristics and thus revealing the functional mechanism of the interference magnetic field....
Stochastic Resonance(SR) can restore the weak signal in a strong noise background more effectively by using noise. According to this, a new way to process the noised signal in a bad noised environment has been provided. A new way of image processing based on bistable Stochastic Resonance and Wavelet transform has been given. Firstly, the noised image is processed by bistable Stochastic Resonance....
Rotation modulation (RM) technique is mainly used in the high precision inertial navigation systems. With the rapid development of MEMS gyroscopes, rotation modulation systems based on the MEMS inertial devices have also been proposed and researched in recent years. Due to the commonly used high voltage (compare with 5V) DC motors in some of the present MEMS RM platforms, the power consumption and...
Smart home control model based on cloud service not only solves the problem that different equipment manufactures carry out diversified long-range control model, but also provides key technology for gang control of multiple devices. However, the operation controversy among user, cloud provider and equipment can't be ignored. To solve the operation repudiation of participators, an ID-based non-repudiation...
With the development of computer science and technology and the further progress of IC fabrication, GPU-accelerating computer systems are more and more widely used to provide higher performance on HPCs(High Performance Computers) and even regular desktop and laptop computers. Almost the same time, the Internet era and the rise of mobile Internet produced PBs of data. Bulk data are useless until carefully...
The performance of vector nozzle is evaluated by the aero-engine vector nozzle measuring platform. The airflow temperature of the vector nozzle is as high as 1100K in the thermal test, which is not conducive to measure the thrust vector. There are several factors that affect the vector thrust measurement. The expansion of the heated vector simulation device generates tensile force on the floating...
Parallel inverter technology is the basis for distributed power generation system to achieve high reliability, high redundancy, high capacity and high scalability, at the same time, it is also the key to the stable operation of distributed generation system. Traditional inverter technology requires low frequency transformer to achieve electrical isolation and voltage matching, which results in the...
Based on the fact that the spectrum in cognitive radio system is typically sparse, a novel wideband spectrum sensing algorithm is proposed taking advantage of Bayesian compressed sensing. Under our proposed scheme, the signal of interest can be sampled at sub-Nyquist rate so relaxing the sampling tension of front-end hardware. Furthermore, the block structure of the spectrum molded by a set of double-level...
This paper investigates output feedback containment control problem for multiple Euler-Lagrange systems based on finite-time observer. By considering the states of leaders are only available to part of followers and leaders are dynamic, generalized velocity observers and distributed adaptive control laws are designed for multiple Euler-Lagrange systems when the generalized velocity cannot be obtained...
Intelligent hardware will drive people into smart life, becoming the new innovative direction of Internet. However, user acceptance levels of intelligent products are not high in the market, because these products lack relevance and have large distances from industrialization. This paper studies somatosensory interaction modalities of intelligent hardware, aims to improve user acceptance of intelligent...
The influence of temperature on the dynamical read performance of tags is presented in this paper. A RFID detection system including a temperature control is devised to simulate the influence of temperature on the dynamic reading performance of UHF RFID system. The reading distance of a RFID tag is measured at different temperature. The result shows that the reading distance of RFID tag reduces with...
Understanding deeply the chaotic measurement, we propose firstly a new concept of chaotic sensor on blood glucose (BG) noninvasive test. The problem of BG test in Medical field is in essence, the measurement of micro impedance and phase shifts of the human body tissues in the field of Electricity. To catch the theoretical characteristics of sensitive dependence on initial conditions and spread spectrum,...
The demand of people for television is higher than before, in the hope that the television becomes more intelligent. This requires that TV not only has reasonable functions and can be induced to the user's intention, actively to finish the task. But the existing problem is the interaction obstacle between the Interface on the TV, the people and the remote control, it is hard to get through the precise...
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