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For the specific propagation characteristics of millimeter wave, in this paper, we study the beamforming design and interference management in millimeter wave cellular networks with partial channel state information (CSI). Specifically, we propose two beamforming schemes, namely eigen beamforming and orthogonal beamforming, based on the information of channel covariance matrix, and analyze the intercell...
A fiber Bragg grating (FBG) acoustic emission (AE) sensing model is established and the cosine-Gauss function is used to simulate the dynamic strain field along the FBG generated by AE waves. The theoretical simulations show that there is a regular relation between the characteristics of FBG reflection spectrum and the parameters of AE wave. In order to verify the simulation results, a FBG AE sensing...
A parking system is of great significance for an intelligent transportation in smart cities. This paper presents a novel parking system designed for smart cities with the technology Internet of things. To ensure its openness, reliability and networking accessibility, the parking system adopts a framework of Internet of things and cloud computing. The framework is divided into four levels: parking...
In this paper, a hybrid block Bregman projection iterative process is designed to seek a common fixed point about N Bregman quasi-strict pseudo-contractive operators. Furthermore, strong convergence results are given in some Banach space.
In this paper, the exponential stability of a class of bi-directional associative memory (BAM) neural networks with recent-history distributed delays is considered. By constructing suitable Lyapunov functional, we derive several sufficient conditions for the globally exponential stability of the equilibrium point of the system. The results of this paper are new and different from previously known...
Green building plays an important role in the development of the construction industry. The key issue of green building is how to operate itself. This paper presents a building management cloud platform for green buildings. Its goal is to realize building operation management by using the technologies of cloud computing and Internet of things. The cloud servers provide data storage, computing and...
Biomimetic robotic fish has potential applications in underwater tasks. To control its swimming, Center Pattern Generator (CPG) models are widely used in its locomotion controllers. The CPG model can generate multiple swimming patterns with the same CPG network. However, there are many parameters to be tuned in a CPG model. In this paper, a parameter optimization method based on particle swarm optimization...
A Love wave sensor with a phononic parylene-C wave guiding layer is proposed to detect the VEGF secreted during the selective platelet activation process, where arrays of a different material (filling material) are fabricated in the parylene-C films. The effects of the structural design parameters (period width and period number) on the electric response of sensors are investigated. As the period...
Corrosion of metal alloys is very common in the industrial field, and failure to monitor the seriousness of corrosion can cause serious consequences. Compared with other Non-Destructive Testing methods, the method of ultrasonic surface wave testing has a lot of advantages including portability, efficiency, and un-contamination etc. This makes it a very promising method to evaluate or monitor chemical...
Piezoelectric lead zirconate titanate (PZT) thick films (t>10μm) with excellent electromechanical property have been considered for flexible electronics applications where precise actuation, control and sensing are desired. The main drawback of piezoelectric thick films is the fragility in device fabrication and application. To protect the PZT thick film devices from fracture, a five-layer sandwiched...
Exceptional properties of piezoelectric lead zirconate titanate (PZT) films and ceramics to convert mechanical forces into an electric field or vice versa make them appropriate in extensive applications in a vast array of areas including sensors and actuators. The purpose of this paper is to model, fabricate and analysis of a new designed flexible PZT-polymer laminated composite cantilever beam in...
Platelets are blood cells that play a critical role in a number of pathophysiological processes. After activation, platelets release a variety of growth factors, including PDGF, VEGF, TGF-β and HGF. Using different agonists, platelets can be selectively activated in different ways. For example, PAR-1 agonist activated platelets release VEGF while PAR-4 agonist activated platelets retain VEGF in them...
In this study, we characterized the elastic properties of additive manufactured metal alloy before and after the electrochemical corrosion using the line-focused ultrasonic transducer system. The calculation was based on the measurement of the surface Rayleigh wave's velocity. The result showed that the velocity of the surface wave and the Young's modulus had negative correlation with the degree of...
We performed a field isotropy study based on the reverberation chamber transfer function for three different reverberation chamber configurations. Guidance for reducing the anisotropy based on the polarization-balanced antenna is also provided. We show that chamber isotropy is strongly influenced by loading such that an unloaded chamber can be considered as an isotropic environment, while a loaded...
With the growth of Android platform malicious application, the seperation of malicious application from nonmalicious application has become challenging. In recent years, a combination of static analysis and dynamic analysis of the idea is very popular. However, it is very costly for dynamic analysis to achieve high coverage. In this article we present an efficient, lightweight and behavior-based architecture...
A system based on the Mach-Zehnder low-coherence interferometer for simultaneously measurement in the field of temperature and strain is presented. This system utilizes the principle of the optical path difference modulation and the coherence length modulation in the low coherence interferometer. After frequently testing the interference signal influenced by the temperature and the strain, the sensitivity...
The decoupling of control planes and forwarding planes in Software Defined Network (SDN) improves the flexibility of computer networks. However, the emergence of virtual switches brings potential security challenges. For data flows with strict requirement of security, an independent forwarding algorithm based on multidimensional spatial superposition model is proposed. When a new flow enters into...
The fresh food supply chain faces significant challenges, the food will lose its value rapidly with storage time, and result in the problem of food safety. For the purpose of fresh food safety and maximize fresh food core enterprises profit, this paper describe a network model of safety fresh food supply chain, with quality competition. The model introduce output rate of path p to obtain the number...
This paper considers the problem of dynamic output feedback H∞ controller design for linear systems with input and output imprecision. In the controlled systems, the measurement and control signal transmissions from the plant to the controller and the controller to the plant, respectively, are assumed to be imprecise, and norm-bounded uncertainties are utilized to model the phenomenon of the imprecise...
Repeatedly practice is a key for learners to develop procedural knowledge. However, such exploration and practice could be costly and dangerous in real world. Computer games provides a convenient and safe environment for learners to master procedural knowledge without temporal and spatial constraints. This study developed an Escape Room-like educational simulation game for learning papermaking. To...
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