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An inherent variable stiffness approach was proposed to suppress the rebound and impact of the electrostatic switch due to waveform deviations. A simple clamped-guided beam spring with large deflection, which generated inherent cubic nonlinear restoring force, was adopted for implementation of the approach. The initial stiffness is very small but increases significantly with the displacement. In this...
In this paper, we examine the possibility to utilize the well-known approximations of Jaccard metric in order to reduce computational complexity of Edit Distance metric estimation. The scope of our analytical results is the representing strings rather than the original (raw) textual data, still in practice we obtained a solid indication that the results can be applied to (raw) strings that have low...
We investigate intense broadband terahertz radiation generation based the interaction of high intensity ultrashort laser with solid plasma. THz pulse with electric field of hundreds of MV/cm are generated using laser with intensity of about 1018 W/cm2. Theoretical model, simulations agree well with experiments, and reveal that the THz radiation is coherent transition radiation by hot electrons produced...
Abuse of drug cause serious problems around the world by years. Thus, anti-drug materials have been increasingly developed. However, conventional anti-drug materials had limited effects on preventing drugs abuse, especially for drug addictive users. To this end, game-based anti-drug materials have been considered as a promising approach to deal with the issue in this study. As far as the drug-addicted...
High-energy, few-cycle THz pulse generation by high-intensity (∼1018 W/cm2) femtosecond laser with plasma mirrors have received significant attention in recent years [1-3]. This novel THz source has the potential of generating large bandwidth millijoule pulse energies, opening up applications in THz nonlinear optics, single-shot imaging and spectroscopy [4]. Solid density plasma shaping has already...
This paper presents a nonlinear electrostatic actuator which utilizes the nonlinear mechanical properties of the classical clamped-guided beam springs with large deformation to slow impact velocity of the movable plates. The initial stiffness of the spring is very small but increases significantly with the displacement. In this way, the increased kinetic energy would be limited. At the same time,...
The dimension of the power systems model may easily reach the order of thousands of state variable in applications such as dynamic simulation, control, etc. So the model reduction is a very important topic in power community. The cost and complication of the controller increases as the system order goes high. This problem can be overcome if a good reduced-order model is available for the original...
Renewable energy is one of the most important sources used for the production of electrical energy due to its natural availability and lack of harmful effects on the environment. From these sources, wind energy is often located in remote areas where exposure to disturbance sometimes affects its functioning. This paper consists of two parts. In the first, we propose a new Modified Bacterial Foraging-Particle...
The integration of a massive number of plug-in electric vehicles (PEVs) in power distribution infrastructure brings direct technical challenges to the network management in terms of planning, control and operation. In order to promote the penetration level of PEVs, it is important to understand the different PEV states as well as the PEV charging demand. This paper attempts to address such technical...
Over the last few decades, there has been a growing interest in technology assisted multimedia learning. The purpose of this study was to develop an online multimedia learning system, TEDQuiz, for English language learners to practice their listening skills. The system is comprised of an easy-to-use browser extension and a personalized online learning management platform. This can help learners to...
High quality, epitaxial, AlGaAs and InGaP thin films have been grown by metal organic chemical vapor deposition (MOCVD) on flexible metal substrates using buffered GaAs on ion-beam textured epitaxial templates. The grown AlGaAs and InGaP films exhibit strong (00Î) orientation and sharp in-plane texture. We also report preliminary developments on AlGaAs/GaAs and InGaP/GaAs double heterostructures (DH)...
This paper presents a new Maximum Power Loss Sensitivity (MPLS) method and Modified Plant Growth Simulation Algorithm (MPGSA) to find the optimal placement and size of Distributed Generation (DG). This study aims to reduce the total power loss and to improve the voltage profile. The proposed solution method has two steps: first, the MPLS is used to select the optimal position of the DG. Second, the...
Malicious apps may install unwanted program or gather sensitive information from mobile devices. We notice Android apps fork several threads to accomplish a complex task intrinsically, and so does Android malware, that makes security experts difficult to analyze them without knowing their structure. In this paper, we propose an analysis scheme to group and analyze Android malware based on their dynamic...
We report a PMOS contact resistivity (pc) improvement strategy by forming Ge-rich contact interface which is compatible to Ti/Si(Ge) system and CMOS integration flow. Short pulsed (nsec) laser anneal and advanced treatment during pre-clean have shown to be effective to segregate Ge towards SiGe surface resulting in PMOS ρc improvement. With Ge% increasing from 45 to 100%, pc improved three-fold, from...
With progress in microelectronics the component density on a device increases drastically. As a consequence the power density reaches levels that challenge device reliability. New heat dissipation strategies are needed to efficiently drain heat. Thermal Interface Materials (TIMs) are usually used to transfer heat across interfaces, for example between a device and its packaging. Vertically Aligned...
We demonstrate intense broadband terahertz pulse generation from the interaction of high intensity femtosecond laser with solid density plasmas. We measure substantial enhancement of terahertz pulse energy (32 цJ/pulse) by using aligned copper nanorod targets.
This paper proposes a canonical correlation analysis (CCA) based workload-performance-resource (WPR) model which can capture and compare the complex many-to-many workload, performance and resource consumption relationship of an application running in physical and in virtual machines. The model can also establish complex relationships of the usage variables of four potentially interrelating resources...
AN Trip system is a location-based way for recording travels, sharing sensations, and deepening life experiences. Various researches and products have been proposed to create location-based services and crowd sourcing activities and to explore the power of geographical knowledge and human computation. We devised AN Trip to assist users in managing trajectory-based travel information. The incentive...
To sustain a good viewing experience of Internet live event broadcast service for users, application performance management in the presence of highly dynamic and unpredictable demand relies on a close grasp of the demand behavior characteristics and an accurate prediction model of them. In this paper, we propose a learning-based behavior profiling model which takes event-related temporal information...
Micro-Doppler feature can provide rich information for motion target classification and recognition of radar. Feature selection is a key step in target recognition and it is a valuable work to analyze the recognition features and the influential factors on recognition accuracy. Four features extracted from foot component and torso component are selected to recognize one walking person and two walking...
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