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Illusory motions refer to the phenomena in which static images composed of certain colors and patterns lead to the illusion of motions. This paper presents a first approach to generating illusory motions on 3D surfaces which can be used for shape illustration as well as artistic visualization of line fields on surfaces. Our method extends previous work on generating illusory motions in the plane,...
The time interleaved method is an efficient solution to breakthrough the interface speed bottlenecks in optical communication. But it's sensitive to the mismatches between the interleaved channels. We introduce a blind adaptive method to correct the timing errors in a four-channel time-interleaved analog-to-digital converter (TIADC). The proposed error estimation method is based on the correlation...
The quiet zone performance of a tri-reflector Compact Antenna Test Range is evaluated by an efficient sampling strategy with rectilinear plane scanning. The method relies on the nonredundant sampling expression of the scattered fields and the optimal sampling interpolation. An evenly stepping sampling based on the nonredundant sampling is also adopted considering the difficulty of practical scanning...
A novel circularly polarized tag antenna designed for RFID UHF band is proposed. An annular-ring microstrip patch with a pair of inserted slits is used to achieve circularly polarized operation. By choosing the proper lengths of two short-circuited arc microstrip lines and its coupling distance, good complex impedance matching can be obtained. The 10 dB return-loss bandwidth of the tag antenna is...
A novel broadband circular polarized two-element PIFA antenna with pattern diversity and high isolation is proposed which can be easily fabricated and embedded into RFID readers. Circular polarization characteristic of the proposed antenna is achieved by introducing a cross branch at its corner of the ground. The modified PIFA structure gives the antenna a broadband impedance bandwidth characteristic...
A novel circularly polarized handset antenna which is compatible with multiple Global Navigation Satellite Systems is proposed. The antenna comprises a palm-size slab as the handset test bench, a small antenna chip mounted at the corner of the slab, a meander line, three branches, and a ground plane with rectangle clearance region. The antenna is featured with several characteristics such as dual...
To do research on the influence of three factors, such as the preload, the ambient pressure and the ambient temperature, on the V type Linear ultrasonic motor (V-LUSM), this study does experiments by using V-LUSM in abnormal environment. This study sets the preload as the main factor, meanwhile considering the influence of ambient pressure and temperature. In the experiments, the study measures the...
The flexible hinge has been proved to be more suitable for the clamping design than the spring. But, it still lacks in-depth research on how the flexible hinge affects the motor's output. In this paper, the laser interferometer is used to measure the real-time displacement of the slide, from which the speed and acceleration curves can be compared to research on this question. Ultimately, the maximum...
The prediction of protein secondary structures has been the focus of bioinformatics for decades. Since Christian Anfinsen's pioneering work, the prediction scheme has been transformed into a numerical optimization case, which purses for the lowest free-energy value. Artificial bee colony algorithm (ABC) is a famous intelligence algorithm, and this work applies a novel ABC modified by internal feedback...
This paper presents a novel system to remove facial scars and pores for a portrait. The facial skin complexion and color are important attractive factors, and most people consider that a good portrait should be scar free and have smooth facial colors. Currently, most available commercial digital cameras or smart phones all provide facial-skin-beatification functions, but most of them only use simple...
An analytic model with different levels of cross-polarization for Gaussian feed is proposed to facilitate a general investigation of the cross-polarization in CATR's quiet zone. Simulation results based on GRASP are shown how different levels of cross-polarization of Gaussian feed affects the cross-polarization of the quiet zone in the proposed CATR.
Binary translation is used to allow applications of one instruction set architecture (ISA) to run on another, thereby maintaining the binary level compatibility across ISAs. Conventional software binary translation systems suffer performance loss because of architectural heterogeneity amongst ISAs, control flow translation and context switches. In this paper, we propose an FPGA based hardware-software...
We present a design of a Compact Antenna Test Range (CATR) designed to operate from 50 up to 500 GHz, suitable for measuring high gains antennas, such as those required for mm-wave atmospheric remote sensing satellites. Drawing on experience from the QMUL CATR designed a decade ago, the team has electromagentically and mechanically designed a CATR with a 1 metre spherical dish and two small aspheric...
In this paper, reflector distortion has been introduced into simulation flow of diffracted Gaussian beam analysis method based on cubic interpolation. It is seen from the simulation results that the gain of the main lobe decreases with the increase of distortion. Also, it is observed that some side lobe level increase.
This paper presents an X-band chirp radar receiver with bandwidth reduction for range detection. The proposed receiver is composed primarily of a RF front end with reconfigurable bandwidth, a receiver baseband and an ADC. The receiver uses dual down-conversion architecture to convert the X-band chirp signal to the baseband signal, which is further mixed with a replica of the transmitted chirp through...
Data centers are typically over-provisioned, in order to meet certain service level agreements (SLAs) under worst-case scenarios (e.g., peak loads). Selling unused instances at discounted prices thus is a reasonable approach for data center providers to off-set the maintenance and operation costs. Spot market models are widely used for pricing and allocating unused instances. In this paper, we focus...
Considering the multi-functional needs of the Automatic Train Operation System (ATO), this paper uses a method combined the prediction algorithm and the multi-variable fuzzy control algorithm to design the ATO automatic speed control module. It divides the operation process into three conditions, includes starting, cruising and parking, and assigns different weights to the three condition depend on...
With the development of Chinese high-speed railway system, the safety of CTCS-3 system is drawing more and more attention. Hazop is a useful method to conduct hazard identification for the CTCS-3 system. In this paper, a complete process of identify the potential hazard of CTCS-3 onboard system on the basis of UML sequence diagram is shown, which can find out the hazards through analysis of every...
A dual shaped reflector system based on kinematic and dynamic ray tracing technique is developed to achieve a circular, collimated, and uniform beam from an elliptical Gaussian beam generated by the Quantum Cascade Laser(QCL) applied in terahertz holographic image system. Simulation result shows that the system has achieved ±0.7dB amplitude ripple and ±7 degree phase vibration for the output beam...
By introducing the symmetry-breaking in geometry, we reveal the existence of thresholdless crescent waves, i.e., nonlinear surface modes pinged to the boundary of a curvature, in an elliptical ring. An effective nonlinear Schrödinger equation along the azimuthal direction is derived by taking the transformation in the curvilinear coordinate of elliptical symmetry, which illustrates the formation of...
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