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This paper focuses on the inspection for sloping dam wall by a remotely operated vehicle (ROV). First, a dedicated ROV for dam inspection is described. Second, a fixed-distance tracking control strategy is proposed to guarantee the fixed camera-to-subject distance in sloping dam inspection, which is instrumental in sonar image fusion for the large-scale dam wall with a certain inclination. In addition,...
The application of Wireless Power Transfer (WPT) systems is primarily limited by its energy transfer efficiency. For modern WPT that utilises Strongly Coupled Magnetic Resonances (SCMR), which transfers energy by using the mutual inductance between coils, a higher efficiency can be achieved compared with a conventional air-core transformer module. An SCMR normally works at a desired frequency which...
The recognition of actions from video sequences has many applications in health monitoring, assisted living, surveillance, and smart homes. Despite advances in sensing, in particular related to 3D video, the methodologies to process the data are still subject to research. We demonstrate superior results by a system which combines recurrent neural networks with convolutional neural networks in a voting...
This paper proposes an output power smoothing control strategy for the wind farm without any other energy storage devices (ESS), which is based on the allocation and control of the wind turbines (WT). The wind turbines in the wind farm are divided into control wind turbines (CWT) and power wind turbines (PWT) separately while playing different roles. The PWTs are expected to output as much power as...
MapReduce system over a cloud computing infrastructure has made an extensive use in the field of finance, medical health, scientific research, traffic, energy and so on which attracts more and more attention on the security of the platform. Due to the sensitivity of the data in these fields, the user suffers great threat on their privacy and security. And the wrong results produced by the MapReduce...
Battery thermal management (BTM) system is indispensable for compact lithium-ion (Li-ion) energy storage system used in aerospace and automotive applications. Besides maintaining the battery temperature within an optimum range, thus extending their lifespan and improving their electrochemical and electrical performance, the BTM system also needs to be well designed with considering the rigorous constraints...
Query answering system (QA) has become an important branch of nature language processing (NLP) and information retrieval (IR), it encompasses a wide range of topics related to the storage and retrieval of all kinds of media. This paper presents a new combination of IR grammars, Latent Dirichlet Allocation (LDA) grammars Doc2Vec models and Deep Learning models to improve the value of Mean Reciprocal...
Land surface longwave (LW) radiation (or longwave radiative flux), including longwave upwelling (LWUR), downward (LWDR) and net radiation (LWNR), are key components of the total energy that drives the surface energy balance at the interface between the earth's surface and the atmosphere. The importance of LW radiation in regulating air temperature and balancing surface energy is enlarged especially...
This work introduces a flexible piezoresistive microcantilever by using polyimide (PI) and silicon oxide (SiO2) as the insulation layers of titanium (Ti) strain resistors. The microcantilever is elaborately devised including the strain and piezoresistive characteristics of Ti and the film formation and patterned process of the PI. The fabricated PI/Ti/SiO2 microcantilever is steady and flexible with...
This work presents a method to fabricate the diamond nanowire at the tip of silver nano-grating which acted as the Plasmon substrates to enhance the quantum efficient of diamond NV color centers for the quantum sensors applications. Due to the well-organized silver nano-grating, the edges of colloidal diamond drop-casted on the silver nano-grating substrate have been arranged as the straightforward...
In this paper, we address the problem of predicting wind turbine electrical subsystem fault using time series data obtained from multiple sensors on wind turbine. While considering this as a time series classification problem, we are facing with the challenge that there is no explicit label information regarding the temporal location and duration of symptoms of the fault. Besides, significant data...
Articulatory features are used as an universal set of speech attributes shared across many different languages. Some multilingual and cross-language speech recognition systems using articulatory features have been shown to improve the performance. The existing articulatory features are defined by phonetician as a set of articulatory descriptions of phones, which represent some semantic information...
This paper addresses the problem of identifying signals of interest from discrete-time sequences contaminated by erroneous segments, which we define as the part of time series whose dynamic patterns are inconsistent with that of the signals. Assuming the signals of interest consist of consecutive samples with arbitrary starting point, duration and following a stationary dynamic pattern, we propose...
Effective machine health monitoring systems are critical to modern manufacturing systems and industries. Among various machine health monitoring approaches, data-driven methods are gaining in popularity due to the development of advanced sensing and data analytic techniques. However, sensory data that is a kind of sequential data can not serve as direct meaningful representations for machine conditions...
In the high-frequency PD radar engineering applications, it is easy to produce the distance ambiguity problem. The most commonly used solutions of the fuzzy algorithms are Chinese remainder theorem, one-dimensional set of algorithms and more than poor look-up table method. This paper presents a new algorithm of range ambiguity resolution, first of all estimate a set of fuzzy distance number of wavelengths...
A modern Wireless Power Transfer (WPT) system is commonly realized by Strongly Coupled Magnetic Resonances (SCMR), which transfer energy by using the mutual inductance between coils. The application of wireless power transfer is critically limited by its energy transfer efficiency. SCMR systems are designed to transmit at a frequency that is equal to the self-resonant frequency of its power receiver,...
In this paper, we study the secrecy outage probability (SOP) of an opportunistic relay selection scheme where an optimal relay is selected based on the delayed feedback from the multi-antenna destination. We present a new exact closed-form expression of the SOP, and two kinds of asymptotic form of SOP are further derived to explicitly show secrecy performance. In addition, we show that the SOP can...
Safety is the first priority of any energy storage system. In this paper, safety studies are performed on three types of 2.6 Ah lithium ion batteries: high-drain thin-electrode battery (Cell 1), cellphone battery (Cell 2) and 18650 type battery (Cell 3), which are different in geometry and internal parameters. The batteries' discharge behaviors are tested on a battery analyzer, and their performances...
Sparse representation based anomaly detection algorithms have received a widely interest in recent years. However, most of the existing approaches fail to pay attention to the manifold structure of the video data, which has been pointed to be important for data representation. To overcome this limitation, we develop a new sparse coding algorithm named constrained sparse representation (CSR) for video...
In a series of studies, articulatory features used as speech attributes for automatic speech recognition systems have been shown to improve the performance. The existing articulatory features are defined by phonetician as a set of articulatory descriptions of phones, which represent some semantic information explaining how humans produce speech sounds via the interaction of different physiological...
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