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In bridge buildings, concrete is widely used because its materials are considerably low-cost and it has high plasticity. However, some drawbacks exist in this kind of bridges, and crack is the most common ones. In order to avoid the cracks in bridge buildings becoming worse, it is necessary to periodically perform the inspection for it. Thus, a bridge inspection robot system with machine vision is...
Cross-modal hashing is usually regarded as an effective technique for large-scale textual-visual cross retrieval, where data from different modalities are mapped into a shared Hamming space for matching. Most of the traditional textual-visual binary encoding methods only consider holistic image representations and fail to model descriptive sentences. This renders existing methods inappropriate to...
Due to the limitation of frequency resources, Long Term Evolution(LTE) is usually applied for the train-ground communication applications of Communication(CBTC) service, Wireless Local Network (WLAN) is used for the train ground applications of Passenger Information System (PIS) service and Closed Circuit Television(CCTV) service. Train ground communication systems for PIS and CCTV applications are...
With the advance of mobile technologies, virtual reality (VR) is coming to every corner of our life. The technology presents a major opportunity for retailers as they lure fickle shoppers to visit their virtual stores, particularly since modern consumers have shifted more of their buying habits online. Currently, merchants face the challenge to weed out malicious software from legitimate users to...
Insulator is an important guarantee for the safe operation of electrified railway, but because of working conditions, the insulator would face long-term effects of wind, snow and rain. Insulator surface would easily accumulate filth and pollution flashover occurs, which often leads to blackouts and threatens the safe operation of the railway. Therefore, detection of the insulator working state is...
As the ubiquity of computers, computer-mediated communications (CMC) has evolved to satisfy one of humanity's basic needs — communication today. Text-based message exchanging has established itself as the most popular CMC medium in our lives than other modes of communication. Compared to face-to-face communication, CMC is not restricted in terms of time and place However, text-based communications...
This paper presents an integrated articulated steering vehicle's (ASV) dynamics model, which provides a simulation platform for research on path tracking control of ASV. The active speed limiting control is designed according to the sideslip constraints to improve the lateral stability of the vehicle during path tracking. The weighted PID controller is applied to control the steering torque based...
In this paper, speed control curve of stepper motor was studied for optimizing the motion flexibility and improving the motion precision of the stepper motor under the open-loop control environment based on Microcontroller Unit (MCU). Firstly, the acceleration and deceleration control curve of trapezoidal and New S model was designed respectively. Secondly, the relationship curve between control pulse...
Aim at large aircraft power supply which use variable frequency ac power supply and has complex power system structure, the parameters test system needs to store the large amount of data, puts forward a data storage strategy based on the system time; To meet the testing requirements of voltage phase difference, three-phase voltage unbalance and other characteristic parameters, the article designs...
The purpose was to use mathematical modeling calculate the fingerprints, quantitative research on traditional Chinese medicine information. We gave a new way to establish four common diseases CGR fingerprint sequence diagram, then gave their usage degree of the synonymous fingerprint sequence defined QRSFU. The preference characteristics of four common disease fingerprint sequences for synonymous...
Flexible manipulator enables curvilinear accessibility through small incisions or natural orifices for minimally invasive surgery and diagnosis, which makes it a good choice for minimally invasive surgery. In order to control the robot precisely and safely, the real-time position and shape information of the robot need to be measured well. In this paper, we propose a magnetic tracking based tip pose...
A hybrid railway power conditioner (HRPC) is developed based on chopper cell modular multilevel converter (MMC) with four legs. The HRPC is able to compensate unbalance currents and reactive power. Its operational voltage at one phase is much lower than the voltage of the railway supply system. This phase of the MMC is connected to the 27.5kV bus without coupling transformer by using a MMC. The application...
Learning to hash has been recognized to accomplish highly efficient storage and retrieval for large-scale visual data. Particularly, ranking-based hashing techniques have recently attracted broad research attention because ranking accuracy among the retrieved data is well explored and their objective is more applicable to realistic search tasks. However, directly optimizing discrete hash codes without...
Free-hand sketch-based image retrieval (SBIR) is a specific cross-view retrieval task, in which queries are abstract and ambiguous sketches while the retrieval database is formed with natural images. Work in this area mainly focuses on extracting representative and shared features for sketches and natural images. However, these can neither cope well with the geometric distortion between sketches and...
Numerous methods have been proposed for person re-identification, most of which however neglect the matching efficiency. Recently, several hashing based approaches have been developed to make re-identification more scalable for large-scale gallery sets. Despite their efficiency, these works ignore cross-camera variations, which severely deteriorate the final matching accuracy. To address the above...
Traditional action recognition methods aim to recognize actions with complete observations/executions. However, it is often difficult to capture fully executed actions due to occlusions, interruptions, etc. Meanwhile, action prediction/recognition in advance based on partial observations is essential for preventing the situation from deteriorating. Besides, fast spotting human activities using partially...
Robust object recognition systems usually rely on powerful feature extraction mechanisms from a large number of real images. However, in many realistic applications, collecting sufficient images for ever-growing new classes is unattainable. In this paper, we propose a new Zero-shot learning (ZSL) framework that can synthesise visual features for unseen classes without acquiring real images. Using...
Recent studies based on functional magnetic resonance imaging technique suggest that the brain functional networks (BFN) may have some spatial variability over time. However, capturing the spatial dynamics of BFNs based on only single subject data is still a challenging task, mainly due to the limited samples in a sliding window. In this paper, a novel quasi group independent component analysis (quasi-GICA)...
A diaphragm based Michelson interferometric fiber-optic acoustic sensor based on symmetric 3×3 coupler is demonstrated in this paper. An ellipse fitting differential cross multiplication algorithm is proposed for signal interrogating. Experimental results show that a minimum detectable pressure (MDP) level of ∼500 μPa/Hz1/2 is obtained.
Recently, zero-shot action recognition (ZSAR) has emerged with the explosive growth of action categories. In this paper, we explore ZSAR from a novel perspective by adopting the Error-Correcting Output Codes (dubbed ZSECOC). Our ZSECOC equips the conventional ECOC with the additional capability of ZSAR, by addressing the domain shift problem. In particular, we learn discriminative ZSECOC for seen...
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