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With the rapid development of information technology, campus card has become an important part of the construction of digital campus. Based on the campus card to build a user behavior analysis system, which can help the school to master the student school of learning, consumption and rest behavior. This article discusses the specific behavior of campus card consumption and the data mining and analysis...
Campus card system in generated a lot of data during it's operation, and the system itself cannot analyze these data. How it can be learned from these massive, outdated data for student management to assist decision-making becomes a very realistic subject. This paper takes the transaction data of campus card as the research object, and uses the comprehensive application of data warehouse, online analysis...
Fusing RGB and depth data is compelling in boosting performance for various robotic and computer vision tasks. Typically, the streams of RGB and depth information are merged into a single fusion point in an early or late stage to generate combined features or decisions. The single fusion point also means single fusion path, which is congested and inflexible to fuse all the information from different...
In digital fringe projection (DFP) techniques, invalid points such as shadows and background cause ambiguity to the measurement. Manually segmenting the object and invalid points is time-wasting, and the improper selection of threshold makes errors in the measurement. In this paper, we propose an automatic threshold selection technique based on both modulation histogram and intensity histogram, which...
In this paper, we aim to address two challenges in the implementation of mobile gaze tracking systems, i.e., the parallax error and the inflexible calibration procedure. Our proposed method mainly involves two steps and all the calibration process can be completed without needs to receive user's commands. At first, instead of fixating at calibration points successively, users are required to fixate...
Based on the superiority of wavelet transform about frequency band division and the detection ability of wavelet entropy in disturbance signal and zero sequence voltage, this paper put forwards an algorithm that identifies fault type effectively and quickly by analyzing the relationship between standard deviation of wavelet singular entropy and wavelet energy entropy before the fault a period and...
This paper presents an algorithm of fault feature gene extraction based on time-frequency domain Statistics for the technical challenge of the fault detection radial-structured power distribution networks. By using this kind of approach, a gene bank can be obtained. Then, the typical fault type, such as short-circuit, open-circuit and single-phase grounding fault, can be detected by using this gene...
Although the mobile head-mounted gaze tracker (HMGT) has gained its great success in human-machine interactions, the real implementation of HMGT still poses several significant challenges. The parallax error and the tedious calibration procedure, as two of these challenges, will be addressed in our proposed two-step calibration method. In the first step, instead of fixating at several pre-defined...
The well-controlled droplets jetting forming permits high efficiency in bonding wire manufacture. In order to achieve better control of the droplets jetting forming, numerous parameters in the jetting process should be studied. This article study the effect of substrate temperature on the solidification of tin bonding wire. Experiments on the solidification of tin bonding wire under different substrate...
As a uniform solder balls manufacturing technology, metal droplets jetting technology can realize controllable deposition of droplets, so it can apply to the production of solder balls array in BGA and CSP packaging. To study the influence parameters to the morphology of the solder balls, we developed an equipment based on the Pneumatic diaphragm drop-on-demand Technology. In this paper, we changed...
Android has dominated the market of mobile devices. Meanwhile, it has become the main target for attackers. How to detect and analyze Android malicious applications (malapps) is an ongoing challenge. Current malapps have become increasingly sophisticated. In particular, zero-day (unknown) malapps appear very frequently and can evade most detection systems that are based on the signatures or patterns...
In this work, a wide dual-band circularly polarized antenna for GPS high-precision survey is proposed and investigated. This antenna is realized by two stacked microstrip patches. Each patch is fed by four ports with orthogonal distribution on the plane, and the four ports are stimulated by separate signals which have same amplitude but 90 degree phase-shift in a clockwise direction. The present antenna...
The parallax error caused by the spatial offset between the eye monitoring camera and the scene camera is a common challenge for head-mounted gaze trackers. To address this problem, the parallax error is investigated based on the epipolar geometry at first and two parallax compensation methods for binocular gaze tracking setups are proposed in this paper to ensure the accurate gaze point estimation...
This paper presents a approach and its algorithmic implementation to address the technical challenge of fault detection and location (FDL) of overhead feeders in radial-structured power distribution networks. The functionality is realized based on the proposed system consisting of a set of wireless distributed measurement units (WDMUs) and an alarm monitoring center (AMC). The three-phase current...
This paper provides empirical evidence of fast root cause identification in assembly house for a case in which SiP chip wire bond showed high ratio of quality and reliability escapes. The identification has been performed through FMEA with a large number of RMAs and through quality control to rescreen goods called-back to minimize the field risk by using reliability tests. Furthermore, as a corrective...
Smart grid is built by the combination of information technology and electric technology based on traditional power grid, and achieves the interaction between power generation and power utilization. However, new security issues appears together with the new cyber-physical power system, and false data injection is one of the attack means, which is impressive for it's difficult from being detected....
This paper addresses the bi-objective optimization of continuous bio-dissimilation process of glycerol to 1, 3-propanediol. A bi-objective optimization model is firstly proposed to maximize the production rate of 1, 3-propanediol, simultaneously maximize the conversion rate of glycerol and ensure the bioprocess is operated under steady-state conditions. Then this bi-objective problem can be transformed...
In the process of solid modeling, non-manifold polygon surfaces may be met frequently. However, most graphics algorithms applied on polygon surfaces require that polygon surfaces must be manifold. Generally, non-manifold surfaces can be transferred into manifold surfaces with similar geometric appearance. The transfer operations include modifying non-manifold surface edges and non-manifold surface...
In this paper, we propose using AdaBoost with decision trees to implement music emotion classification (MEC) from song lyrics as a more appropriate alternative to the conventional SVMs. Traditional text categorizations methods using bag-of-words features and machine learning methods such as SVM do not perform well on MEC from lyrics because lyrics tend to be much shorter than other documents. Boosting...
Since magnetically suspended control moment gyroscope (MSCMG) is an important actuator for attitude positioning of the spacecraft control, the precise control for the MSCMG with the high stability is crucial. Aiming at the non-linearity and parameter perturbation in the MSCMG axial active magnetic bearings (AMB) system under multiple disturbances, this paper employs a novel fuzzy integral sliding...
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