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When the vector hydrophone is applied to the underwater platform, the acoustic wave that scattered by the platform has a serious impact on the measuring properties of the vector hydrophone. Regarding to the vector hydrophone's engineering application, a study on the near-field acoustic characteristics of the finite elastic plate is reported. In this paper, the theoretical basis of the finite element...
Avionics full duplex switched Ethernet (AFDX) is a time-critical network for aeronautical communications. Based on the static routing configuration of the virtual links (VL), real-time packets can be transmitted before their deadlines through AFDX. The next generation aeronautical communication environment comprises of multiple networks and service providers. Packets transmitted in AFDX may be changed...
A three-dimensional (3D) technology computer-aided design (TCAD) modeling of guard-drain based on 45-nm CMOS process is presented. Numerical simulations of single-device show that charge collection of the guard-drain technique will higher than that of the conventional technique in different ion incidents. Guard-drain technique fails in helping drain to mitigate single-event transient (SET). Mechanisms...
Ferroelectric random access memory (FeRAM) is a promising candidate to substitute static random access memory (SRAM) in lookup table (LUT) design due to its high density, high speed operation, anti-radiation and non-volatility. Ferroelectric gate field effect transistors (FeFETs) have been extensively studied and its usage in memory elements and basic analog circuit configurations has gained much...
Emerging magnetic random access memory (MRAM) has been considered as a promising candidate for the next generation high speed, low power and scalable nonvolatile memory technology. However many challenges and issues are still existing before its wide commercialization. One of the critical issues is its low sensing reliability due to the relatively small tunnel magneto-resistance (TMR) ratio of the...
This paper focuses on the design of a multifunctional signal processing system for unmanned underwater vehicles. It takes the multicore DSP TMS320C6678 as the primary processor. The design of two most important parts of the system, processing board and master board, are given in detail. The system uses CPCI as power supply channel and data bus, SRIO and gigabyte ethernet are provided for data transmitting...
A hybrid intelligent model for linking social media with open innovation strategies, processes and diffusion is proposed and discussed in this paper. In order to deal with the various facets or properties of the open innovation problem, we recommend and present a new paradigm and framework for integrating the strengths or advantages of intelligent software agents, fuzzy logic, expert systems, complex...
Serious games are beneficial for education in various computer science areas. Numerous works have reported the experiences of using games (not only playing but also development) in teaching and learning. Considering it could be difficult for teachers/students to prepare/develop a game from scratch during one semester, assistant educational materials would be crucial in the corresponding courses. Unfortunately,...
Millimeter-wave holographic imaging system can acquire 3D images and is nonionzing, which especially fits human imaging. Widely utilized linear antenna arrays provide high scanning speed as well as non-uniformity artifacts. In this paper, we developed a set of calibration methods and image denoising algorithms to eliminate the influences of system errors including response non-uniformity, transmission...
Electric Variable Transmission (EVT), as a new kind of electromechanical energy converter, can be used in hybrid electric power train to make the engine operate efficiently by decoupling the engine speed from the wheels. To further study and develop control strategies of EVT based HEV on the test bench, real driving environment is required. For this purpose, this thesis designs a dSPACE based hardware-in-the-loop...
Adopting test bench to do research on HEV is efficient at low costs, but in traditional test bench, the real engine is used to do lots of experiments, which produces a lot of tail gas, and the use of an engine is limited while safety is not high. This paper designs an engine emulation system based on the Electric Variable Transmission (EVT) simulation platform for the HEV power train. The high controllability...
In this paper, statics model of an underactuated wire-driven flexible robotic arm is introduced. The robotic arm is composed of a serpentine backbone and a set of controlling wires. It has decoupled bending rigidity and axial rigidity, which enables the robot large axial payload capacity. Statics model of the robotic arm is developed using the Newton-Euler method. Combined with the kinematics model,...
Aimed at the low earth satellites under lunar perturbation, this paper derived two sets of dynamic equations based on the Reference Satellite Variable (RSV). One is for orbital motion of the reference satellite and another one is for relative motion between satellites. Both sets of equations are simple and accurate and expressed explicitly. Because of clear physical meaning of the selected Reference...
Mixed-criticality systems allow tasks of LO-criticality and HI-criticality to share the same platform. Such a design approach provides high resource usage for modern embedded systems. However, there are many challenges need to be addressed before mixed-criticality systems can be widely deployed. One key problem is how to schedule the task set to guarantee that all HI-criticality tasks meet their deadlines,...
In this letter, we show by the theoretical analysis and computer simulation that the polarization of microstrip antenna can be changed using metamaterial with homogeneous constitutive parameters by applying the transformation optics approach, which is used to design the invisible cloak. We demonstrate that, the distribution of electric field between patch and ground-plane will be altered by filling...
By deploying a substantial number of antennas on the base station (BS) side, massive MIMO system has been demonstrated to achieve unprecedented spectral efficiency. However, its performance is still limited by pilot contamination due to unavoidable reuse of pilot sequences from user terminals in other cells. In this paper, we focus on the performance analysis of zero-forcing beamforming in a finite-antenna...
With the rapid advancement of modern high-technologies and demands for dexterous manipulators or drive elements, multi-degree-of-freedom (M-DOF) actuators have widely attracted the attentions of many researchers and been researched. This paper introduces the structure model and application of the method of Distributed Multi-Pole modeling for the rotor position detection, choosing the PM 3-DOF deflection...
This paper mainly focuses on the design and electromagnetic analysis of magnetic field distribution and torque characteristics of a novel three-degree-of-freedom deflection type permanent magnet actuator based on analytical and 3D finite element method with comparison analysis. The air gap flux density distribution is derived with clear solutions of equations in spherical coordinates. With finite...
The color images produced by digital cameras are usually not in conformity with their inherent colors. This will seriously impact computer-aided facial image analysis because it is on the basis of accurate rendering of color information. To solve that, we propose a novel color correction framework. Firstly, we utilize 122 undistorted facial images to demarcate complexion gamut. Secondly, several training...
As a kind of carnivorous fish, largemouth bass is of high economic value. When it is farmed, its food habit should be transformed from the living food into artificial bait. The traditional way of feeding domesticating has such problems as low survival rate, cannibalism and heavy workload. To solve these problems, on the basis of the food characteristic of largemouth bass, a device depending on waterflow...
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