Miracle-dz/UniFAR-FTUs huggingface dataset:
A Fast Localization of Multiple Harmonic Sources for Rectifier Loads by Utilizing Periodogram

This paper introduces a fast method to localize the multiple harmonic sources (MHS) for rectifier based loads in power distribution system by utilizing periodogram technique with a single-point measurement approach at the point of common coupling (PCC). The periodogram is a fast and accurate technique for analyzing and distinguishing MHS location in power system. Matlab simulation is carried out several unique cases on IEEE test feeder cases due to validate the proposed method. The identification of MHS location is based on the significant relationship of spectral impedance which are fundamental impedance (Z 1 ) and harmonic impedance (Z h ) that's extracted from an impedance power spectrum. It is verified that the proposed method is fast, accurate, and cost efficient in localizing MHS. In addition, this method also contributes 100% correct identification of MHS location.
Hybrid As2Se3-PMMA microtapers and applications

n this thesis, a hybrid technology platform based on As_{2} Se_{3} and PolyMethyl MethAcrylate (PMMA) is investigated with the aim of achieving versatile, compact, mechanically robust, and highly nonlinear microwires. Hybrid microwires composed of an As_{2} Se_{3} core and a PMMA cladding are fabricated by tapering hybrid fiber structures using a state-of-the-art taper fabrication method. Two approaches based on two different hybrid fiber structures have been used for the fabrication of microwires. In the first approach, a single-mode hybrid fiber composed of an As_{2} Se_{3} single-mode fiber and a PMMA coating layer is tapered to obtain a hybrid microwire. In the second approach, a bulk As_{2} Se_{3} cylinder is coated with a PMMA layer to form a multi-mode hybrid fiber that is subsequently tapered into a hybrid microwire. The As_{2} Se_{3} core of the microwire provides an ultrahigh nonlinearity up to \gamma=180 W^{-1} m^{-1} whereas the PMMA cladding provides mechanical strength for normal handling of the device and reduces sensitivity to the surrounding environment. With such a large waveguide nonlinearity parameter, a 10 cm hybrid microwire could replace a conventional highly non-linear silica fiber (\gamma\sim0.01 W^{-1} m^{-1} ) of 1.8 km. The successful operation of hybrid microwires is demonstrated with the observation of self-phase modulation, supercontinuum generation, and all-optical switching. Moreover, an hybrid microwire structure with an eccentric As_{2} Se_{3} core and a PMMA cladding is fabricated to achieve ultrahigh birefringence and a high nonlinearity. The birefringence is induced by having the As_{2} Se_{3} core eccentric with respect to the circular PMMA cladding symmetry. Eccentric-core microwires with high group birefringence up to b_{g}=0.018 are demonstrated. Highly nonlinear eccentric-core hybrid microwires with engineerable birefringence can be used for applications such as polarization-entangled photon generation. %%%%Abrege – Dans cette these, une plateforme technologique hybride basee sur l'As_{2} Se_{3} et le PolyMethyl MethAcrylate (PMMA) est etudiee avec l'objectif d'obtenir des microfils hybrides hautement nonlineaires, versatiles, compacts et mecaniquement robustes. Les microfils hybrides composes d'un coeur d'As_{2} Se_{3} et d'une gaine de PMMA sont fabriques par l'etirement de structures hybrides a partir de methodes de fabrication dans l'etat de l'art. Deux approches basees sur l'usage de deux structures de fibre hybrides ont ete utilisees pour la fabrication des microfils. Dans la premiere approche, une fibre hybride monomode composee d'une fibre optique monomode d'As_{2} Se_{3} enrobee d'une couche de PMMA est etiree pour l'obtention du microfil hybride. Dans la deuxieme approche, un cylindre brut d'As_{2} Se_{3} est enrobe de PMMA pour former une fibre hybride multimode et par la suite est etiree en microfil hybride. Le coeur d'As_{2} Se_{3} du microfil genere une nonlinarite elevee de \gamma=180 W^{-1} m^{-1} tandis que la gaine de PMMA assure une…
Research of Extracting Product Features from Chinese Online Reviews

Now online reviews have become an important resource for mining users' opinion and refining products. As a foundation of further analysis, features extraction influences the precision of the opinion mining results. This paper proposes a PMI-Bootstrapping algorithm which realizes extracting product features from Chinese online reviews by combining three language rules. First, utilize the language rules to get a candidate feature set. Then, calculate the weighted average PMI for each candidate feature with the seeds in the initial seed set. Add the candidate feature which satisfies the threshold to the seed set. Iterate until the seed set is convergent. Output the seed set as the extraction result. Experimental results show that the algorithm achieved very good precision and recall rate.
Image Generation Method Based on Image Edge Information

An algorithm was proposed to generate automatically embedded image. With the use of outline matching and shape deformation, the proposed method can insert an interior object with partial deformation into an outer object image, having better results by considering the cavity of the outer object. The embedded object is easily observed because its color is opposite to the outer object while the outer object’s cavity can be part of the interior object. By designing method which is applied to express object’s edge strength, the matching result of the algorithm can be optimized.
Design and analysis of visualization techniques for mobile robotics development

Simultaneous localization and mapping (SLAM) algorithms are of vital importance in mobile robotics. This paper presents novel Augmented Reality (AR) visualization techniques for SLAM algorithms, with the purpose of assisting algorithm development. We identify important algorithm invariants and parameters and combine research in uncertainty visualization and AR, to develop novel AR visualizations, which offer an effective perceptual and cognitive overlap for the observation of SLAM systems. A usability evaluation compares the new techniques with the state-of-the-art inferred from the SLAM literature. Results indicate that the novel correlation and color-mapping visualization techniques are preferred by users and more effective for algorithm observation. Furthermore the AR view is preferred over the non-AR view, while being at least similarly effective. Since the visualizations are based on general algorithm properties, the results can be transferred to other applications using the same class of algorithms, such as Particle Filters.
Image-Analogies Based Super Resolution

Most methods of super resolution so far enhance images by adding exterior information extracted from a given training set.However,this is impractical in lots of cases.From analysis of an ideal edge model and texture contents within images,it is found that many images hold similar local structure at different resolution and preserve it stably in the scale space.Based on this property,Image Analogies can be applied to pass local information onto lower resolution image and thus to achieve resolution enhancement.Original image and its lower-resolution version are used to construct the training set to fit this problem to Image Analogies,and it is resolved by minimizing a graph with energy.Experimental results show that this self analogies algorithm can amplify images much more sharply than traditional interpolation-like methods,and more importantly,it can be executed independently without any supposed outliers.
Implementation of Median Filter on FPGA

In order to solve the problem that the speed of classical median filter was slow because of lots of sorting,an improved median filter algorithm is described.For a filter window,each row is sorted up first,and then each line,the median value in the cater corner is the result.Verilog HDL code of the improved median filter algorithm is implemented and simulated in the Modelsim 6.5a IDE,validated and realized on the Altera DE2 board.
Surface modification of aluminum doped zinc oxide (AZO) anodes with CFx plasma treatment and nanoscale WOx layers for enhanced electro-optical performance in OLEDs

Aluminum doped zinc oxide (AZO) films were subjected to carbon tetra-fluoride (CF4) plasma treatment and deposition of tungsten sub-oxide (WOx) surface layers to evaluate the impact on its workfunction, for application as transparent conducting oxide (TCO) anodes in organic light emitting diodes (OLEDs). Ultraviolet photoelectron spectroscopy (UPS) revealed that CFx plasma treatment improved the workfunction of AZO from 4.1 eV to 4.5 eV and that deposition of nanoscopic (~ 3 nm) WOx surface layers resulted in an effective workfunction of 4.7 eV for the AZO/WOx stack. The increase in workfunction with plasma treatment is due to increased electronegativity of the surface, and reinforcement of the existing surface dipole. Gap states in the higher workfunction WOx layer determine the effective workfunction of the AZO/WOx (3nm) composite. The performance of surface modified AZO anodes was compared to standard indium tin oxide (ITO) in simple bilayer OLEDs with tris(8-hydroquinoline) aluminum (AlQ3) as the emissive and electron-transport layer, and -Bis (naphthalene-1-yl) -bis(phenyl)-benzidine (NPB) as the hole transport layer. At 9 V applied, OLEDs with AZO/WOx (3 nm) anodes exhibited luminous efficiency (LE), power efficiency (PE), and external quantum efficiency (EQE) of 4.7 Cd/A, 1.6 lm/W and 1.5 % respectively, which were higher than the 2.4 Cd/A, 0.9 lm/W and 0.9 % from OLEDs with standard ITO anodes. OLEDs with CFx plasma treated AZO anodes demonstrated LE, PE, and EQE of 2.3 Cd/A, 0.8 lm/W and 0.8 %, respectively, which were higher than as-deposited AZO, but smaller than ITO. The improved efficiency of the AZO/WOx devices is ascribed to better band alignment (between the anode and NPB), hole injection, and charge balance compared to standard ITO.
Effect of the Surface Hardening on the Corrosion and Erosion Corrosion of Low Carbon Steel

This research studied the effect of surface hardening (Carbureting, Nitrating and Nitro-Carbureting) on corrosion and corrosion–erosion of low carbon steel C10E (0.2%C). The surface treatments were carried out to the specimens of the used steel and showed the effect of saline (Bath salt), erosion corrosion suspension on the amount of loss weighted of the surface sample immersed in that mediums.Micro-hardness( Vicker's) test was carried out for all the samples before and after surface treatment (Carbureting, Nitrating and Nitro-Carbureting )Some samples was immersed in bath saline ( 3.5%NaCl ) and others in (3.5%NaCl +SiO2) as aggressive suspensions at different periods of time (3,6,9,15) days . The results of corrosion –erosion tests which were conducted on the samples(the sample upon receipt and after Carbureting, Nitrating and Nitro- Carbureting ) showed the occurrence of corrosion –erosion on the surface of tested sample by loss amount of the surface mass which measured in )mg/cm². day) . The results of testing hade been compared and analyzing the erosion and corrosion by using loss amount of the surface mass which measured in (mg/cm².day). The best performances have shown samples which have been treated with duplex surface treatment (Nitro-Carbureting) as was predicted.
Improving quality of free-viewpoint image by mesh based 3D shape deformation

In this paper, we present a method to synthesize high-quality virtual viewpoint image targeting the detailed texture objects. About 30 images are taken from multiple uncalibrated cameras around the object, and the Visual Hull model is reconstructed with Shape from Silhouette method. To deform 3D surface model that is converted from Visual Hull Model using the information such as image texture and object silhouette, the difference between the real object and the reconstructed model is evaluated as a cost function of optimization problem. Our deforming model algorithm is based on single vertex iterative shifting. The vertex of surface triangle mesh is moved to the selected candidate point that maximizes the cost function. The cost function is consisted by four constraint criteria, texture correlation, smoothness, object silhouette, and mesh shape regularity. In addition to the cost function, such as judging mesh direction and combining / dividing meshes are applied for refined 3D models to avoid mesh folding and mesh size unevenness. The refined model provides a quite accurate dense corresponding relationship between the input images, so that high quality image can be synthesized at virtual viewpoint. We also demonstrate the proposed method by showing virtual viewpoint images to applying the real image that are taken from multiple uncalibrated cameras.
Experimental Investigation of Wire EDM Process Parameters on Heat Affected Zone

It is vital to study the impact of heat since it has an unwanted phenomenon on the operating life of parts produced, which is in turn effect the cost of production. when dimension accuracy is the primary function Wire cut machining comprehensively used specially when machining hard metal by using precisely controlled sparks that occur between a very thin wire and a workpiece in the presence of a dielectric fluid. The aim of this research is to study the effects of some Wire Electrical Discharge Machining (WEDM) variables on heat affected zone, white layer and Surface Roughness (SR) of high speed steel using ANOVA method to analyze the behavior of control parameters such as pulse on time (μs), current and wire tension. Experimental investigations separates into two main parts in the first one the wire electrical discharge machining process was accomplished on smart EDM (Electra wire cut machine), and in the second part the roughness of the machined samples surface was tested and the samples were prepared to be measured. The results shows that the heat affected zone and the white layer are affected with the risen of the current and pulse on time values more than the risen in wire tension values, as well as the wire tension affects the surface roughness more than the current and pulse on time.
Speed Sensorless Control of a Surface-mounted Permanent Magnet Drive

Permanent magnet synchronous machines are a popular choice for electric vehicle propulsion, with both interior and surface magnet rotor designs in use. Position feedback is required for commutation, with minimal phase delay. Speed data should be able to track the vehicle speed at maximum acceleration. Elimination of the shaft position sensor reduces cost and improves reliability, but can be challenging for surface magnet machines at low speeds, due to their lack of saliency. However, bread-loaf and inset magnets give sufficient saliency to make signal injection position estimation schemes viable. Experimental results are presented for a commercial 3.27kW machine, using signal injection at low speeds and transitioning to a novel model reference adaptive system back emf estimation scheme at high speeds, which employs an iterative search algorithm to reduce position tracking delays. The rationale for selection of filter frequencies and tuning gains is explained.
A comparison of coupled and uncoupled dynamic analysis for the flexible riser in shallow water

Flexible risers have been used extensively in recent years for floating and early production systems. Such risers offer the advantage of having inherent heave compliance in their catenary thereby greatly reducing the complexity of the riser-to-rig and riser-to subsea interfaces. Another advantage with flexible risers is their greater reliability. Concerns about fatigue life, gas permeation and pigging of lines have been overcome by extensive experience with these risers in production applications. In this paper, flexible riser analysis results were compared through coupled and uncoupled dynamic analyses methods. A time domain coupled analysis capability has been developed to model the dynamic responses of an integrated floating system incorporating the interactions between vessel, moorings and risers in a marine environment. For this study, SPM (Single Point Mooring) system for an FSU in shallow water was considered. This optimization model was integrated with a time-domain global motion analysis to assess both stability and design constraints of the flexible riser system
A Comparative Study of Academic Networks in Computer Science and Physics

Academic networks derived from research papers, in particular citation and coauthor networks, have been studied widely. Although networks in an individual discipline particularly physics have been studied substantially, the difference across different disciplines remains unclear. This thesis shows that networks generated in computer science differ greatly the networks in Physics. The data used in our experiment contain more than two million papers in DBLP and half a million papers in Physical Review journals. We observe that both citation networks can be classified as scale-free networks. Papers in DBLP has a shorter life than PR. And physicists collaborate more closely than computer scientists in both citation and co-author networks. Collaborations evolve over time in both disciplines. For the ranking of papers, we find that the traditional PageRank algorithm is not appropriate for citation networks. We investigate the small-world characteristics in both kinds of networks in terms of small average shortest path.
Compact battery-less information terminal (CoBIT) for location-based support systems

The target of ubiquitous computing environment is to support users to get necessary information and services in a situation-dependent form. Therefore, we propose a location-based information support system by using Compact Battery-less Information Terminal (CoBIT). A CoBIT can communicate with the environmental system and with the user by only the energy supply from the environment. It has a solar cell and get a modulated light from an environmental optical beam transmitter. The current from the solar cell is directly (or through passive circuit) introduced into an earphone, which generates sound for the user. The current is also used to make vibration, LED signal or electrical stimulus on the skin. The sizes of CoBITs are about 2cm in diameter, 3cm in length, which can be hanged on ears conveniently. The cost of it would be only about 1 dollar if produced massively. The CoBIT also has sheet type corner reflector, which reflect optical beam back in the direction of the light source. Therefore the environmental system can easily detect the terminal position and direction as well as some simple signs from the user by multiple cameras with infra-red LEDs. The system identifies the sign by the modulated patterns of the reflected light, which the user makes by occluding the reflector by hand. The environmental system also recognizes other objects using other sensors and displays video information on a nearby monitor in order to realize situated support.
Wavelet based neuro-fuzzy classification for EMG control

High accuracy of multiple degrees of freedom in prosthetic control is hard to obtain because uncertainty exists between different movements. Neuro-fuzzy technology is suitable to deal with such problems. We adopt a wavelet based neuro-fuzzy approach to classify EMG signals for movement recognition in order to decrease classification error. EMG signals are analyzed by wavelet transform, and feature vectors are constructed by SVD transform from wavelet coefficients for further movement recognition. A neuro-fuzzy network is designed as classifier, and its initialization and training are also involved. Comparison results for this method and traditional ones are provided to show its efficiency. High recognition and reliability are achieved in preliminary experiments.
Optimization of high-k composite dielectric materials of variable oxide thickness tunnel barrier for nonvolatile memory

<span>Downscaling the tunnel oxide thickness has become one of the innovative solutions to minimize the operational voltage with better the programming/erasing (P/E) operation time. However, the downscaling technique faces several challenges where the conventional SiO<sub>2</sub> tunnel layer has reached its limit. But a practical alternative has been introduced; Variable Oxide Thickness (VARIOT) technology in flash memory has been promising. VARIOT is one of tunnel barrier engineering technology for incorporating the high-k dielectric materials as a composite tunnel barrier. This paper presents the VARIOT concept to determine the optimum set of combination, the equivalent oxide thickness (EOT) and the low-k oxide thickness (T<sub>ox</sub>) for alternate high-k materials. Fowler-Nordheim (F-N) tunneling coefficients are also extracted for various combinations of VARIOT, where in this work ZrO<sub>2</sub>, HfO<sub>2</sub>, Al<sub>2</sub>O<sub>3,</sub> La<sub>2</sub>O<sub>3, </sub>and Y<sub>2</sub>O<sub>3 </sub>are used. The VARIOT optimization is conducted using 3-Dimensional (3D) Silicon Nanowire Field-Effect-Transistor (SiNWFET) device structure and simulated in TCAD Simulation tools. From the simulation results, it has found out that the high-k materials of La<sub>2</sub>O<sub>3 </sub>asymmetric stack is the excellent dielectric material among four (4) other dielectric materials; ZrO<sub>2</sub>, HfO<sub>2</sub>, Al<sub>2</sub>O<sub>3 </sub>and Y<sub>2</sub>O<sub>3</sub> for EOT=4nm and T<sub>ox</sub>=1nm. </span>
Recent Trends in IT - Virtualization

The term Information Technology usually puts a picture in our mind of society’s application of the high end computing knowledge to solve the practical problems almost all the fields. Technological Innovation or the application of technology takes many forms across multiple industry verticals. The highly growing “IT Trend” Per se Virtualization is a concept has revolutionized the way the companies access their software applications, recent trends in this concept is allowing businesses to eliminate entire server farms and give a lot of way to the cost cutting of the company also making the IT infrastructure more economical and flexible, server virtualization has given root to use this tech for almost all the other IT initiatives. Usage of the term “Virtualization” will not restrict only for one particular field of Technology as in servers, the application in limitless.
Re-engineering the Legacy Software Systems by using Object-Oriented Technologies

YOU, DANYU, M.S., December 2013, Industrial and Systems Engineering Re-engineering the Legacy Software Systems by using Object-Oriented Technologies Director of Thesis: Dušan Šormaz A legacy system refers to the software system that was developed a long time ago and is still in service. Due to lack of documentations as well as the outdated structure, it is often costly to maintain the legacy systems. Re-engineering a legacy system mainly focuses on improving quality and maintainability of the existing system by introducing new designs. In this research, object-oriented software technologies based methodology was proposed to re-engineer the legacy system, which was implemented with non-object-oriented structure, to achieve better flexibility and maintainability. Object-oriented design patterns are studied to provide flexible and reliable solution for common problems that are confronted in implementing. The clustering technologies are used to discover similar patterns shared by various functions therefore providing the guidance on class design. Unified Modeling Language (UML) provides standard and graphical representations for describing and documenting system design. In the case study, the proposed methodologies are successfully applied to re-engineer the Multicorp legacy system. Results indicate that objected-oriented methodologies help improve system flexibility, usability, maintainability and