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In this paper, a vision-based approach is proposed for the unified tracking and regulation task of a wheeled mobile robot equipped with a monocular camera. To construct the error system, the orientation and scaled position information is extracted from the current, the reference, and the desired images based on the homography techniques. Considering the nonholonomic constraint and the unknown depth...
Based on the requirements of miniaturization, stability and definition of the image acquisition device, an embedded Linux image acquisition and display system based on embedded system is designed. The system hardware using ARM core S3C2440 microprocessor, USB camera and LCD display to build image acquisition and display system; the software system placed Linux system as the core is built. Build hardware...
Automatic Facial Action Unit (AU) detection has drawn more and more attention over the past years due to its significance to facial expression analysis. Frontal-view AU detection has been extensively evaluated, but cross-pose AU detection is a less-touched problem due to the scarcity of the related dataset. The challenge of Facial Expression Recognition and Analysis (FERA2017) just released a large-scale...
This paper presents a novel unsupervised superpixel-based change detection approach to detect multiple changes in Very-High-Resolution remote sensing images. The proposed approach investigates the spectral-spatial variations at superpixel level which aims to enhance the traditional pixel level change detection performance. In particular, superpixel representation of the spectral change vectors is...
In the high frequency OTHR (over-the-horizon radar), the contaminated ionosphere will lead to the sea clutter shift and broadening in Doppler domain, which in turn has obvious affection on the detection of ships and other targets. Considering that the signal of the sky wave OTHR is severely reflected by ionosphere, a method is proposed to correct the sea clutter based on centroid in the RD (Range-Doppler)...
How to achieve the balance between exploration and exploitation is a open problem in the field of evolutionary computation. Diversity is used to reflect the balance in practice. In this paper, a scheme that using colony fitness defined by us in selection is proposed to achieve the balance. Such a scheme can be widely used in different evolutionary algorithms. Our experiments are executed based on...
As the one-dimensional projection of the echoes from scattering centers on a target along the radar line-of-sight, high range resolution profile (HRRP) has drawn great attention to automatic target recognition (ATR). Normally, features are extracted based on the strong scattering centers of HRRP. In recent years, several scattering center estimation methods have been proposed, such as Prony and orthogonal...
With the development of wind power technology, the installation of the wind turbines increase greatly in amount, the workload of the maintenance is also growing rapidly, the wind tower free climbing device play an important role in the daily inspection and maintenance work. To overcome the shortcomings existed in the style that manage and maintain the tower free climbing device, this paper proposes...
This paper presents an electrochemical microsensor based on ultramicroelectrode array modified with copper nanoparticles to perform trace nitrate detection in potable water. The microsensor is fabricated with standard micromachining technology. As the working-electrode, an ultramicroelectrode array constructed of 421 disk-shaped ultramicroelectrodes provides enhanced electrochemical performance for...
A simple, highly sensitive magnetic immunoassay three dimensional optics biosensor based on total internal reflection magnetic imaging (TIRMI) was fabricated for the point-of care testing (POCT) of C-reaction protein (CRP). The chip substrate is formed by the combination of a 3D glass substrate and a plate polymethyl methacrylate (PMMA) substrate by close bonding of glass optical glue. The micro channel...
Biochemical oxygen demand (BOD) is an important index for the assessment of organic water pollution, which needs to be detected rapidly and sensitively. In this paper, a BOD biosensor has been developed based on the direct immobilization of microorganisms around carboxyl graphene (GN-COOH) modified ultramicroelectrode array (UMEA). UMEA is designed in ring shape and hexagon distribution, which shows...
Energy Internet is studied as a promising electricity-centered energy network, which revolves around reliable framework, widely interconnected, highly intelligent and open interaction. In this paper, we propose the system structure of energy switch and the mainly function of energy switch. And then a optimization model of energy management in microgrid based on energy switch was built. The optimization...
In order to solve the problems about frequency fluctuation, power allocation between AC and DC sub-microgrid, and operation switching between island and grid-connection mode, a synthetically operation control strategy of hybrid AC/DC microgrid is presented in this paper. As the main converter in AC sub-microgrid, the control strategy of the storage converter adopts the voltage control type virtual...
This work proposed a compact multiple-input multiple-output (MIMO) antenna system having four antennas each fed by coplanar waveguide (CPW) operating for 3.5GHz band (3400–3600) MHz. The proposed MIMO antenna system is realized with two groups of printed Inverted L-monopole of size 5×4 mm2 placed orthogonally to each other to attain the diversity capability of polarization and pattern at the edge...
Low-profile, power-efficient antennas are required for body-worn devices applicable for long-term healthcare monitoring. The paper is focused on the fabrication of fold cylindrical helix (FCH) antennas, and measurement of their performance on the human body. The study considers one-element and two-element FCH arrays. It is found that the fabricated FCH antenna can excite the same on-body propagation...
In this paper, we propose a new deep artificial neural network architecture for synthetic aperture radar target recognition codenamed DeepSAR-Net. Unlike most existing methods, this approach can learn discriminative features directly from the training data instead of requiring pre-specification or pre-selection by a human designer. Furthermore, our method is adaptable, and it is learning to recognize...
The concept of Wireless Body Area Network (WBAN) technology holds great potential for many applications such as continuous, remote, healthcare monitoring. Motion activities associated with the head reveal important physiological information about the health of the user. In order to develop a system capable of tracking and characterizing these activities, a fundamental understanding of the propagation...
Traditional kernelized correlation filter tracking methods use the target position in the current frame to estimate the moving target initial position in the next frame. For fast moving target, these methods lose the target easily. To cope with this problem, a novel scale-adaptive regression position prediction tracking approach is proposed. This algorithm employs regression prediction method to predict...
In the real-world environments, multipath components (MPCs) of wireless channels are generally distributed as groups, i.e., clusters. Modeling the clustered MPCs is important and necessary for channel modeling and an automatic clustering algorithm is thus required. This paper proposes a novel Kernel-power-density (KPD) based algorithm for MPC clustering. It uses the Kernel density to incorporate the...
A compact four-port multiple input multiple output (MIMO) antenna system is proposed operating in C-band at 3.5 GHz (3400 ∼ 3600) for future fifth generation 5G technology mobile broadband services. The four-port MIMO antenna system consist of an Inverted-L(IL)shape monopole on the edges of non-ground portion of 9×9 mm2 with substrate FR-4 and ground plane of dimensions of 136×68 mm2. The compact...
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