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Vehicle platooning using reliable wireless communication between the member vehicles is a promising method to increase road capacity, lower fuel consumption, and improve safety and driver comfort. IEEE 802.11p is a key communication technology in Vehicular Ad-hoc Networks (VANETs) for Intelligent Transport System (ITS) applications. The broadcasted awareness messages in the wireless communication...
Vehicle-to-others (V2X) communication systems intend to increase safety and efficiency of our transportation networks. However, wireless communication imperfections such as missed messages due to collisions and fading in the wireless channel, may affect safety application reliability and lead to risky situations. Thus metrics are required to evaluate the impact of communication inadequacies on the...
Stability and rapidity of phase angle detection in grid synchronization system is very important, especially when grid voltage is under adverse conditions. This paper presented a fast direct calculation phase-locked loop (FDC-PLL) method which can detect phase angle directly from the corresponding relationship between the absolute value of grid voltage and the phase angle. And the d-q conversion is...
Due to the nonlinearity of DC-DC converters, small-signal methods do not guarantee the stability of DC-DC converters under any large-signal disturbances. In this paper, semi-tensor product of matrices with Lyapunov stability theorem is firstly adopted for analyzing the large-signal stability of DC-DC converters. A buck converter with proportional-integral (PI) controller is used as an example. Based...
With increasingly serious energy and environmental problems, development of new energy saving products is critical to the modern society. Vacuum glass has excellent thermal insulation properties and attracted wide spread attention. The preparation of vacuum glass involves vacuum technology, materials science, machinery, automation technology and other fileds. The key technology of vacuum glass is...
To obtain high CRI and improve color quality of white light-emitting diodes (WLED), a red, green and blue (RGB) phosphor-in-glass (PiG) was developed for ultraviolet (UV)-excited WLED packaging. RGB PiG was fabricated by screen-printing of glass paste and low temperature sintering. The effects of mass ratio and concentration of RGB phosphor on the optical performances of UV-excited WLED were investigated...
It is somewhat challenging and confusing to the conventional mindset to say that teleportation can be achieved without classical channel. In this talk, I will show how quantum teleportation can be achieved without the need of classical channel. Our protocol does not require prearranged entangled photon pairs and Bell measurements. By utilizing quantum Zeno effect and couterfactuality, we can entangle...
In this paper, the hybrid implicit-explicit finite-difference time-domain (HIE-FDTD) method is proposed for efficient simulation of graphene-based frequency selective surfaces (GFSS) at Terahertz band, with the Drude model of monolayer graphene and associated auxiliary differential equation (ADE) technique implemented into the numerical methods for solving the Maxwell's equations. Numerical simulations...
The station-less shared traffic system removes the restriction on rental and return at the predetermined stations. How to minimize the cost of vehicle maintenance and dispatch remains a big concern. This paper proposes a genetic algorithm based on the features of station-less shared traffic system to optimize the multi-objective problem to achieve minimized system deviation and cost, by redesigning...
This paper proposes a new concept of performance degradation for switched systems in the sense of stability and converging rate. The relationship between the eigenvalues of each subsystem and the converging rate of the whole switched system is established, which can help to evaluate the accepting performance degradation in the presence of faults in system components and actuators. The efficiency of...
A beam-steering array operating in the 28-GHz band is described, including a 1-by-4 patch antenna array, liquid crystal (LC) based microstrip meander line phase shifters and feeding networks. The RF signal is coupled to the patch antenna array from the slots in the ground plane. The LC phase shifters are implemented in a kind of inverted microstrip line (IMSL) topology by filling liquid crystal between...
At present, to improve their businesses and obtain more profits by enhancing enterprise competitiveness, more and more listed companies have been committed to the selection of executives and the study of motivation. Among the many forms of incentives, stock-based compensation play a vitally important role. Many scholars abroad did survey on the relationship between equity incentive and corporate performance,...
This paper proposes a new concept of performance degradation for switched systems in the sense of stability and converging rate. The relationship between the eigenvalues of each subsystem and the converging rate of the whole switched system is established, which can help to evaluate the accepting performance degradation in the presence of faults in system components and actuators. The efficiency of...
In this paper, a new low profile and closely spaced dual-polarized antenna (DPA) is proposed. The low profile DPA element with height of 0.112λ is made of a four-port radiator and two feeding networks. Simulated results show that the element can cover the frequency band of 2.535–2.655GHz, along with reflection<−13dB, port isolation<−21dB, gain over 8.8dBi and stable 3dB beam width (62°±2°)....
Modeling and multi-objective optimization of a Combined Cold-Heat and Power (CCHP) system are studied on the basis of the Transient System Simulation Program (TRNSYS). After the CCHP system is built on the TRNSYS plant, data is collected on the operation of the CCHP system. Based on the semi-tensor product theory, a fuzzy matrix model that can accurately reflect the characteristics and relationship...
This paper studies the receding horizon control (RHC)-based stabilization problem of a class of constrained nonholonomic systems in power form. A non-quadratic cost function is constructed by using the homogeneous norm of the nonholonomic system in power form. Based on this novel cost function, a novel RHC algorithm is designed. The feasibility of the designed algorithm and the closed-loop stability...
This paper presents a design scheme of portable AUV remote control device based on MOOS-IvP architecture. The remote control device takes the raspberry pi microcomputer as the main controller. The handle of the game is the key module. It communicates with AUV through the wireless bridge. Lithium battery supply power through the sub voltage module. The software use the Ubuntu operating system based...
One kind of Deep Learning models-convolutional neural network, which can reduce the complexity of network structure and the number of parameters to be determined through local receptive fields, weight sharing and pooling operation has achieved state of art results in image classification problems. But this model has gradient diffusion problem, which can cause slow updating of the underlying parameters...
This paper proposes a strategy of Active Disturbance Rejection Control (ADRC) applied to the Permanent Magnet Synchronous Motor (PMSM) sensor-less system. Speed-loop controller and current-loop controller based on ADRC were used in the permanent magnet synchronous motor vector control system. The speed is estimated by extended state observer (ESO) of ADRC. In additional, since the controller has many...
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