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Third-party libraries (3PLs) are widely introduced into Android apps and they typically request permissions for their own functionalities. Current Android systems manage permissions in process (app) granularity. Hence, the host app and the 3PLs share the same permission set. 3PL-apps may therefore introduce security risks. Separating the permission sets of the 3PLs and those of the host app are critical...
Aiming at the limitations of the current rehabilitation training system in individual adaptability, safety and feasibility of operation, the electroencephalogram (EEG) and electromyography (EMG) signals which reflect the motion pattern and fatigue of patients are applied into the virtual rehabilitation system in this paper. The system collects the EEG and the surface electromyogram(sEMG) of upper...
For practical applications, a noise floor of an interferometric fiber-optic hydrophone system mainly originates from optical phase noise, electronic noise and demodulation algorithm noise. To assess an influence of each noise on the noise floor of the system and explain their interrelation among them, the paper demonstrates theoretically a demodulation scheme for PGC-ATAN (PGC-Arctangent) in detail,...
Multi-label learning has received significant attention in the research community over the past few years. Traditional supervised learning techniques do not fit it well, as real-world objects might be complicated and have multiple semantic meanings simultaneously. In our work, we set our goals to mine the involved product attributes in comment data from JD.com. This task is fundamental and significant...
In this paper, a novel coupler based on permanent magnet, which is high-pressure and high-temperature durable, is developed and analyzed. The working principle of the proposed coupler is given. The generation of the magnetic force of the coupler is qualitatively explained by the reluctance theory. A theoretical model based on electromagnetic theory is built and solved in FEA code. The magnetic force...
A flexible, compact dual-band antenna system for wireless body area network(WBAN) applications is presented. The design is based on a CPW-fed bow-tie slot antenna, operating at 2.45 GHz and 5.8 GHz. To reduce the backward scattering wave towards the human body, a novel compac double square based Artificial Magnetic Conductor(AMC structure is proposed. The configuration of the AMC-integrated antenna...
This paper analysis starts from the typical architecture of high-frequency solid-state transformer (HF-SST), which is the core power part of Energy Internet, and studies the key technology and control scheme of main circuit of bidirectional dc/dc converter and cascaded H-bridge converter. Based on the complex structure, in dc/dc stage, the uniform-discretization control strategy is proposed to simplify...
This paper reports a new wrist vein biometric passive recognition sensor with preliminary verification based on a shuttle roller coaster structure. This sensor can obtain the vein images around the wrist to construct a 3D vein model for vein recognition. The experiment has proved that this sensor provide more information for the 3D vein modeling, which paves the way for the following design. It is...
We report an integrated fiber-optic power meter by dip coating PbS colloidal quantum dots onto a pretreated specialty fiber. We measured the readout current at 1550nm as a function of the optical power, the bias voltage and the distance between the contact electrodes.
Electromagnetic (EM) and circuit modeling are the prevailing practices for the anticipation and extraction of data transfer performances of 3D interconnects in a system-in-package (SiP). In comparison, this paper proposes a more abstract and cost-efficient evaluation method and an enhancement method thereof from the perspective of network information theory and communication channel modeling. Firstly,...
A passive (power-less), bending type MEMS DC current sensor to satisfy the increasing needs of DC power supply for monitoring the electricity consumption by either one-wire or two-wire appliance cord was proposed in our past work (DTIP 2011). A MEMS-scale prototype DC sensor, comprised of 5 parallel PZT plates, was then micro-fabricated for preliminarily examination (DTIP 2012). A novel oscillating...
Task-based functional magnetic resonance imaging (tfMRI) is widely used to localize brain regions or networks in response to various cognitive tasks. However, given two groups of tfMRI data acquired under distinct task paradigms, it is not clear whether there exist intrinsic inter-group differences in signal composition patterns, and if so, whether these differences could be used for data discrimination...
Automatic extraction of fiducial mark in X-ray images[1∼2] is an important research field in surgical navigation systems. Traditional Hough circle detection and edge detection are lack of accuracy. This paper propose a robust extraction method for fiducial mark in X-ray images based on the Histogram of Oriented Gradients(HOG)[3] operator. The process of fiducial mark extraction has two steps: the...
Composite materials have been adopted and become critical in aerospace industry. However, due to the fatigue under continuous loading, the uncertain in structural integrity still remains an unsolved problem. The assessment of structural damage in composite laminates can be achieved by damage location, classification, and quantification. The growth trend of delamination area is one of the most important...
This paper presents the experimental results of capacitive imaging sensors for structural integrity assessment. The capacitive sensor is based on the measurement of capacitance change due to the anomaly or discontinuity in structures and materials. A number sensor prototypes are investigated in the study. The observation of the scanned image of a Aluminum plate, a carbon fiber plate, and ductile iron...
Dempster-Shafer Theory has been extensively employed in the field of information fusion due to its impressive capability to cope with uncertain information. But when it deals with completely conflictive evidences or highly conflictive evidences, the phenomenon of counter intuition will occur. In this paper, shortcomings of the commonly accepted measure of conflict are analyzed and to avoid the wrong...
Proper feature selection for unsupervised outlier detection can improve detection performance but is very challenging due to complex feature interactions, the mixture of relevant features with noisy/redundant features in imbalanced data, and the unavailability of class labels. Little work has been done on this challenge. This paper proposes a novel Coupled Unsupervised Feature Selection framework...
Recent years have witnessed the prevalence of networked data in various domains. Among them, a large number of networks are not only topologically structured but also have a rich set of features on nodes. These node features are usually of high dimensionality with noisy, irrelevant and redundant information, which may impede the performance of other learning tasks. Feature selection is useful to alleviate...
In this paper, thermal-mechanical reliability of TSV structure was investigated with thermal shock test and finite element method. The fine pitch TSV samples were subjected to thermal load, failure samples were identified by resistance measurement, the calculated characteristic life was about 340 cycles. It is revealed that thermal-mechanical stress is concentrated around TSV, the ends of TSV are...
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