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In this paper, we present a physics filter which can enhance the user experience of human computer interaction applications. We demonstrate the filter through an interaction system with head gestures and movements. Users interact with the computer through the wink detection function, implemented by eye brightness intensity analysis, and head tracking function, implemented by a facial landmark detector...
LTE is a globally deployed standard. CSFB (Circuit Switched Fallback) is one of the major voice solutions in LTE network. We found one vulnerability in CSFB where the authentication step is missing. This allows an attacker to impersonate a victim. We named this attack as ‘Ghost Telephonist’. The consequence of this attack include: (1) The attacker can impersonate the callee and obtain the content...
In order to research the scattering characteristics of moving targets, a simulation method applied with quasi-static theory is proposed. Firstly, the CAD model of target is established and then the all-space static RCS database for this target is set up by electromagnetics software. Secondly, the flight track is established so that the real-time posture change can be described. The attitude angles...
China's Grain for Green Programme (GGP) is the largest ecological restoration programme ever implemented in a developing country, but the ecological effectiveness in its whole implementation region still remain uncertain. Based on the trend analysis of dynamics in ecosystem structure and service, we assessed the ecological effects before and after the implementation of the GGP in 1990–2010 by developing...
Visual analytics plays a key role in bringing insights to audiences who are interested and dedicated in data exploration. In the area of relational data, many advanced visualization tools and frameworks are proposed in order to dealing with such data features. However, the majority of those have not greatly considered the whole process from data-model mining to query utilizing on dimensions and data...
We proposed a tunable planar chiral metamaterial (PCMM) which can achieve a giant and photoexcited tunable circular dichroism (CD) effect. The tunable PCMM is composed of an array of conjugated bilayer wheel structures integrated photoconductive silicon (Si). The conductivity of photoconductive Si pads filled in the gap of wheel structures can be tuned efficiently through illumination with different...
Only using the post-earthquake PolSAR imagery to interpret collapsed buildings information is a rapid and effective disaster investigation means, which is also easy and fast for implementation of the earthquake damage assessment. This work is focused on rapid building earthquake damage information detection in urban areas using a single post-earthquake PolSAR image. In this paper, the Precision Weighted...
A V-band CMOS sub-harmonically injection-locked quadrature voltage-controlled oscillator (SILQVCO) is presented using 90-nm CMOS process in this paper. A transformer coupled topology is employed in the SILQVCO to enhance locking range and operation frequency. The measured free-running oscillation frequency is from 56.6 to 59 GHz with a tuning range of 2.4 GHz. With one-third sub-harmonic injection,...
Elderly care is one of the important issues in the medical mature of the time facing all over the world. Currently, the paper-based testing and recording methods are commonly used in various care centers which not only waste manpower but also may cause mistakes with different social workers in assessment. This study aims at measuring the cognitive function of elderly by the empirical research approach...
It's really important that how to keep cognitive functions of elderly. According to several research result shows, regular doing exercise or playing games may help elderly slowing down degeneration. In this study, we attempt to combine narrative concept and dynamic assessment theory to develop a kinect-based game for elderly on cognitive functions training. Moreover, a Web-based management system...
During the control process of the three-phase PWM rectifier, the parameters of the conventional PID controller are kept constant. It's unable to make appropriate changes according to the actual working condition of the rectifier and the change of working environment, which limits the adaptability of the rectifier to environment and working conditions. Against this point, the single neuron adaptive...
Facial expression recognition (FER) has been applied for human-robot interaction (HRI). An assistant robot having a close interaction with human being should be able to recognize human facial expression. FER is a non-trivial problem because each individual has his own way to reveal his emotion and the facial expressions of two different persons may not be totally identical. Facial expression can be...
Visualization of the 3D point cloud model has played a crucial part in augmented reality and virtual reality for a long time. Besides, the technique of modeling also greatly benefit the application related to understanding crowd dynamics. In this paper, we introduce a technique to restore the the background area occluded by the front objects from a single viewpoint. In our procedure, we adopt the...
Traffic panels contain rich text and symbolic information for transportation and scene understanding. Fast detection of traffic panels facilitates text information extraction but has been paid little attention by the community. In this paper, we propose a fast and robust approach for rectangular traffic panel detection from traffic scene images. Considering the rectangular shape of traffic panels,...
This paper proposes a real-time hand finger motion capturing method using Kinect. It consists of three modules: hand region segmentation, feature points extraction, and joint angle estimation. The first module extracts the hand region from the depth image. The second module applies a pixel classifier to segment the hand region into eight characteristic sub-regions and the residual sub-region. The...
In cognitive radio networks (CRNs), the spectrum utilization can be dramatically improved with the secondary users (SUs) accessing the unoccupied licensed channels opportunistically. However, how to fully utilize the spectrum holes to meet the quality of service requirements of SUs is still an open issue. In this paper, we focus on multi-user, multi-channel case, and analyze the stable channel state...
It is predicted that the global mobile data traffic will increase nearly eightfold in the next five years, and the cloud applications will consist of 90 percent of total mobile data traffic by the end of 2019. There is no doubt that the increasing high quality video requirements and huge similar information stored in cloud servers enforce to setup a new communication paradigm. In this paper, we will...
Vehicle verification in two different views can be applied for Intelligent Transportation System. However, object appearance matching in two different views is difficult. The vehicle images captured in two views are represented as a feature pair which can be classified as the same/different pair. Sparse representation (SR) has been applied for reconstruction, recognition, and verification. However,...
Visible-spectrum indexes based methods for detection of vegetation coverage suffer from a dependence solely on color. To address these issues, this paper presents a graph cut and total variation based variational level set segmentation algorithm combining local wavelet texture and prior color. First, the prior color is generated through manual labeling with histogram estimation; local wavelet texture...
The MEMS acceleration sensors have been widely applied in many fields, especially in the detection of geological and geological imaging. In this paper, on the basis of MEMS sensors designed the sensor peripheral circuit and the signal conditioning circuit. The theoretical simulation and experimental test are adopted to carry out the shallow geological exploration project. Experimental results show...
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