Advanced Materials Research Vols. 760-762

Abstract: Semantic similarity between concepts is widely used, but the measuring method is still a challenging task. We proposed a semantic similarity measuring method, using concreteness degree of a concept which is based on constructing process of ontology. Firstly, Concreteness degree of concept was defined for the concept by depth of the concept itself and its most specific descendant, then according to the Jaccards Coefficient the semantic similarity between concepts measured by the specified process of the two compared concepts and their co-specified process. Experiment result shows that the proposed method gained a higher correlation coefficient to human judgments than other compared measures.

Abstract: It is necessary to establish the rule base before intrusion detection. An adaptive method based on genetic algorithms was presented for learning the intrusion detection rules in order to realize the automation of attack rule generation. The genetic algorithm is employed to derive a set of classification rules from network audit data, and the support-confidence framework is utilized as fitness function to judge the quality of each rule. The generated rules are then used to detect or classify network intrusions in a real-time environment.

Abstract: Vehicular ad hoc networks is a special mobile ad hoc networks. Due to the limited bandwidth, high vehicle mobility and density of vehicles, scalability is a major challenge in VANETs. Recently, Sagarika Mohanty et al. proposed a secure RSU-Aided Aggregation and Batch-Verification Scheme for Vehicular Networks by using data aggregation technique. And they had shown that their scheme could provide conditional Privacy Preservation and Identity Traceability. Unfortunately, in this paper, we show that their scheme does not achieve these functions by analyzing the security of the scheme. Any one can distinguish whether the different messages is from the same vehicle. And the scheme is also not to resist replay attack. Finally, the corresponding attacks are given.

Abstract: This paper mainly introduces the principle and usage of dynamic probe technology, and makes comparisons between traditional test method and the most popular debugging methodutilizes the embedded tool of debugging on chip to debug. The research depends on self-designed FPGA test service system based on dynamic probe technology. It also explores how to use existent tools and technology for high efficiency test method in FPGA debug and verify process. Through comparisons, it is possible conclude that dynamic probe technology is able to cope with the complex test requirements, and provide more accurate sampling data than the general method in the debugging process. More importantly, the dynamic probe can complete switching a group of the internal signal to be measured within a few seconds, which greatly reducing the waiting time of debugging.

Abstract: Photothermal therapy relies on the principle of converting light energy into heat causing localized lesion destruction. For safe and effective treatment, it is necessary to monitor temperature diffusion in the boundaries of the irradiated region, to minimize damage to surrounding normal tissues. This paper gives a pilot study of the feasibility of photoacoustic imaging for monitoring temperature changes during photothermal therapy. The results showed that our system of photoacoustic imaging (PAI) can play the role of biosensor, for the photoacoustics signal amplitude depend on temperature of tissue-mimicking phantoms. Whats more, photoacoustic signal can determinate the boundary of photoabsorder-enhance tissue during therapeutic procedure.

Abstract: The behavior analysis in intelligent control, human-computer interaction, video conferencing has a wide range of applications, it has become one of the most attractive areas in computer vision. The main purpose is to extract movement information from the video, and then conduct the analysis and identification. This paper is based on behavior analysis of the status quo, applies the idea of parameter to behavior analysis. According to human skeleton extracted from the video sequence, we can determine the limb endpoints and joint points, and establish a parametric equation to describe human behavior state. Tracking one key point in different frames and recording coordinates, we can establish a cubic spline function to describe the human motion trajectory.

Abstract: Research of college classroom intelligent Lighting control system is based on the point of view of intelligence and energy saving. Considering the phenomenon of lighting waste and poor system management, a design of high stability and low power consumption intelligent Light control system is proposed. Through the research of distribution method of light source and the application of CAN bus communications technologies, this paper mainly introduces a distributed light control system based on ARM. According to the demand of indoor illumination, the system can achieve real-time and accurate regulation of all classrooms lights. Compared with the traditional lighting control system, besides the characteristic of energy saving, the system also is characterized by strong anti-interference and intelligent management etc.

Abstract: The problem of how to detect and diagnose the tube leakage and blast through the methods of acoustics and information fusion is dealt with in this paper with the purpose of detecting the accident more accurately at its initial phase. Firstly, the acoustic monitoring method is employed since it is contactless, and then the weak leakage is detected, analyzed and diagnosed through such methods as the PCA, neural network and D-S evidence theory. Secondly, the simulation is conducted, which testifies that the diagnosis effect can be improved greatly by this way.

Abstract: The brushless DC motor applied on the electric steering gear of trajectory correction projectiles often requires getting real-time rotational speed value. The hall sensors output the hall signals for measurement, after the integration by the D-type flip-flop, an ideal pulse can be produced. Afterwards STM32F103ZE microcontroller is used to calculate the rotational speed value of the motor by the Improved M/T method. The resolution and precision can be analyzed after getting the result. This rotational speed measurement system has high precision and good real-time characteristics. It is significant for the meaning of the correction of the steering gear.

Abstract: A non-magnetic temperature controlling system used in atomic magnetometer with flowing hot air has been designed and realized. To measure the temperature in the oven without any additional magnetic noise, a fiber Bragg grating was used as a non-magnetic temperature measuring sensor with a high relative accuracy. Analysis has showed the temperature fluctuation can be controlled less than 0.1°C.