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We propose a high network utilization CONGestion- Aware load balancing approach, Multi-hop CONGA. It aims at improving the performance of handling traffic asymmetry, which happens occasionally in data centers. It leverages regular Clos topology and overlays for virtualization. In this paper, we schedule at the unit of flowlet, which is the burst of packets belonging to a flow, and make routing decisions...
Aiming at the problem that solutions obtained by simply using FOA (Fruit fly optimization algorithm) would fall into local optimum, with slow convergence and low accuracy, we therefore propose an algorithm EOFOA that combines EO (Extremal optimization algorithm) with FOA. EOFOA brings the basic idea of EO, an algorithm of extremal dynamics, into FOA, so as to prevent local optimum and increase convergence...
The touch panel used for this experiment is the WEINTECH MT6071iE. The six-axis robotic arm was controlled by an AT90CAN128, manufactured by the ATMEL Company. A DGServo servomotor was used to drive the robots joints, which consisted of four servomotors with 12 kg torque, two 1.8 kg servomotors with reduction gear, and some precision aluminum alloy components. Driven by the servomotors, the robotic...
This study focuses on the design of a wearable inertial navigation device that is based on a MEMS chip and a Bluetooth wireless transmitting module and that uses the object-controlling technology of the Unity game engine to write a game script for a treasure hunt in an ancient Chinese virtual reality world. The wearable device proposed in this paper utilizes an ATmega168 chip as the main controller,...
This paper considers the cooperative control problem of second-order agents formation tracking a set of given curves on spheres when each agent suffers an unknown spatiotem-poral flowfield. The flowfield under consideration is composed of three known base vectors and the unknown corresponding coefficients. A novel coordinated adaptive estimator is proposed to estimate the unknown flow coefficients...
Hypertension is one of the most prevalent cardiovascular diseases in the world. People at the stage of prehypertension may have no clinic symptom, but the arterial wall and function of autonomic nervous behave abnormally. Thereby, to detect abnormality in vascular system or autonomic nervous function at prehypertension stage and to estimate the evolution of prehypertension will enable the early clinical...
In this study, an ultrasound sensor that was put on a smart wheeled mobile robot (SWMR) was used to detect parking space environment, simulate drivers' parking strategy, and complete roadside parking and reverse parking. In order to achieve automatic parking, the functions of the system included searching for suitable parking space, detecting adjacent obstacles, planning the parking path, producing...
This paper presents a novel perspective of performance evaluation for visual attention estimation: how the saliency models perform in mobile conditions. In particular, a broad-spectrum contrast sensitivity function is firstly proposed in this work. Based on this function, a new visual perception model is established, which will be further used to simulate the image perception in various mobile circumstances...
SVMs have been very successful in pattern recognition and function approximation problems. In this paper, by collecting the human driving data, a data-driven lateral controller for autonomous vehicle based on SVMs is presented. Furthermore, according to the model of the vehicle, a simple method to improve the performance of this controller is introduced. The simulation results and experiments on the...
The adequacy assessment of generation system including wind farm is a complicated process due to the inherent uncertainty of wind power generation. To evaluate the reliability benefit of the integration of wind power properly, it is critical to model the stochastic characteristics of wind power generation accurately. Considering that wind power output highly depends on wind speed, several methods...
Tracking how correlated ideas flow within and across multiple social groups facilitates the understanding of the transfer of information, opinions, and thoughts on social media. In this paper, we present IdeaFlow, a visual analytics system for analyzing the lead-lag changes within and across pre-defined social groups regarding a specific set of correlated ideas, each of which is described by a set...
When ships run at high speed-cavitation is formed in the bulge area. Because cavitation can make big noises-it will be a threat to the sonar. Cavitation can also destroy the blades of propellers. A method is proposed that underwater cavitation is suppressed through vortex generation. The effect of flow noise and radiated noise from vortex generator on sail hull model is investigated. Through the comparison...
This paper presents the design and implementation of a high-throughput Sorted QR Decomposition (SQRD) circuit for MIMO communication systems. The proposed design is architected based on a novel pipelined Givens Rotation structure comprising of multi-dimension CORDIC elements. Furthermore, this circuit reduces the excessive delays of norm-calculations and sorting operations, and thus the time efficiency...
The control strategy of intersection is the important factor for passing efficiency of modern streetcar and social vehicle. This paper provides a new control strategy named regional-priority at intersection along streetcar line, to achieve the high punctuality rate of streetcar and reduce the delay time of social vehicle. Regional-priority is based on the timing plan of traffic signal controllers...
Hand gesture is an effective and natural way for human-robot interaction (HRI). This paper presents a robust dynamic hand gesture recognition system with a RGB-D sensor. In order to automatically recognize hand gesture from color and depth sequences, where noise and occlusion are common problems, we extract steric Haar-like features to robustly represent the complicated spatial information of the...
LCLC converter is an LLC-based, four-element resonant topology, which has been proved to achieve high voltage gain and high efficiency. Such trait makes LCLC converter specifically suitable for wide-input-voltage-range DC/DC applications. Currently, LCLC converter lacks a design method targeting at optimal efficiency over a wide input voltage range. In fact, due to the complexity, efficiency itself...
This paper presents optical and environmental test results on SC-UPC pigtails terminated with Ferrolder® and zirconia ferrules. The Ferrolder, a ferrule and holder in one solution, is an epoxy-less replacement for ceramic ferrule and holder.
This paper presents a V-band transmitter frontend for beamforming phased array system. The front-end consists of a reflective-type phase shifter, a gain amplifier, a differential phase inverter, and a driver amplifier. The measured phase tuning range covers the full 360° range, from 55 to 65 GHz. The power gain is 9.5 dB, and the output P1dB is 4.7 dBm at 60 GHz. The chip size is 0.89 mm2 in 90-nm...
Recently, the emergence of topological edge state of matter raises new challenges in understanding the states of condensed matter and phase transitions beyond the the Ginzburg-Landau paradigm. The discovery of topological edge states of condensed matter also stimulate the development in other field, such as the realm of photonics, particularly in photonic crystals (PhCs). In this paper, we systematically...
Various dedicated web services in the cyberspace, e.g., social networks, e-commerce, and instant communications, play a significant role in people's daily-life. Billions of people around the world access them through multiple online identifiers (IDs), and interact with each other in both the cyberspace and the physical world. These two kinds of interactions are highly relevant to each other. In order...
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