Miracle-dz/UniFAR-FTUs huggingface dataset:
Signal Denoising Method Based on KICA by Noise Components

Denoising is an essential part of fault signal analysis. This paper proposes a kernel independent component analysis (KICA)-based denoising method for removing the noise from vibration signal. By introducing noise components of the observed signal, one-dimensional observed signal is extended to multi-dimensional signal. Then performing KICA on multidimensional signal, the noise in the observed signal consistent with the introduced noise will be removed that achieve the purpose of denosing. The effectiveness of the proposed method is demonstrated by the case study.
An Adaptive Control Method With Low-Resolution Encoder

An adaptive control methodology with a low-resolution encoder feedback is presented for a biomedical application, the Ros-Drill (Rotationally Oscillating Drill). It is developed primarily for ICSI (Intra-Cytoplasmic Sperm Injection) operations, with the objective of tracking a desired oscillatory motion at the tip of a microscopic glass pipette. It is an inexpensive set-up, which creates high-frequency (higher than 500 Hz) and small-amplitude (around 0.2 deg) rotational oscillations at the tip of an injection pipette. These rotational oscillations enable the pipette to drill into cell membranes with minimum biological damage. Such a motion control procedure presents no particular difficulty when it uses sufficiently precise motion sensors. However, size, costs and accessibility of technology on the hardware components severely constrain the sensory capabilities. Consequently the control mission and the trajectory tracking are adversely affected. This paper presents a dedicated novel adaptive feedback control method to achieve a satisfactory trajectory tracking capability. We demonstrate via experiments that the tracking of the harmonic rotational motion is achieved with desirable fidelity.Copyright © 2013 by ASME
NC Machining Simulation of Loop Subdivision Surface Algorithm with Sharp Feature Keeping

Subdivision technology provides a convenient way to represent smooth surfaces of arbitrary topological structures. The technology is now widely applied in character animation and computer graphics. However, it meets challenges if to be employed in machining. This paper focuses on the problems of surface subdivision in machining applications and the solutions for these problems. The work includes two parts. First, an algorithm of Loop subdivision that can keep sharp surface features is presented. And second, a cross-section method is employed to obtain the NC tool path of the divided surface. The NC tool path of the refined model is verified with the MasterCAM software. The research is valuable for the improvement of the subdivision scheme commonly used in CAD/CAM system.
Simulation of Transmission Efficiency for Different Bending Radius of Aerosol Sampling Inlet

The purpose of the paper is to simulate transmission efficiency for different bending radius of aerosol sampling inlet using CFD. To evaluate the transmission efficiency, we introduced Discrete Phase Model to simulate aerosol movement. Results from simulations show that the greater transmission efficiency aerosol sampling inlet will be, the larger bending radius is. At 300mm bending radius, aerosol transmission efficiency is almost 1 for 10μm diameter of particular matter. The CFD model can effectively simulate the characteristic and loss of aerosol particulate matters through the bending tube.
Situation awareness systems, states and processes: a holistic framework

This paper argues that state, system, and process descriptions of situation awareness (SA) are interdependent. Based on SA research from the last 30 years, the paper proposes a holistic SA framework. SA states emerge from processes of exploring situations through SA systems. Reflecting research on safety II (resilience), in describing SA states, the framework distinguishes frames (what situations are considered) from implications (regarding the situations) of objects on and of an event horizon. The paper describes and discusses SA system and process dependencies on SA states. It also describes SA system components as mediators and catalysts for SA, SA system properties (e.g. buffering SA), and dynamic SA system formation. Based on an analysis of four enactments of Air Traffic Control situations, the paper argues that what is domain-characteristic may not characterise all situations in a domain. The SA field could thus benefit from incrementally refining a nuanced cross-domain framework.
SPICE-based CAD modeling of high-speed data links

Computer aided design tools are required for the reliable and time-efficient specification of high-speed optical data links for computer networking.1,2 This paper focuses on the development of an optical link simulation environment called SOLUS (simulation of light using spice), for use in the design of Gbit/s optical data links. The SOLUS simulation environment is illustrated in Fig. 1. It supports a topdown design methodology by providing hierarchial models for link design, and circuit models for link module design.
Design of the Equal-Loading Butt Joint for CF62 Steel

High-strength steel is often used in the design and manufacture of the pressure vessel and the failure accident often happens in the weld area after used. CF62 is chosen in this paper which is the large-scale sphere steel for manufacture and the equal-loading butt joint of whose three different sizes are designed. The weld simulations of the equal-loading joints are made by 3D FEM, then the residual stress distributions and the influence of the thickness are analyzed in this paper. The results show that the equal-loading butt joint's weld toe is without stress concentration and the equal-loading butt joint can reduce the residual stress during the welding process. The thinner equal-loading butt joint has the lower residual stress. The joint designed by the equivalent Von Mises calculation has the lower stress than the one designed by the maximum stress calculation as well and the same as the weld toe's stress concentration. But the half reinforcement width of the maximum stress calculation butt joint is smaller than that of the equivalent Von Mises joint and whose welding electrode is economical, so the maximum stress equal-loading joint fits the engineering practical more.
Fuzzy criticality assessment model for failure modes and effects analysis

This paper presents a tool for reliability and failure mode analysis based on an advanced version of the popular failure mode, effects and criticality analysis (FMECA) procedure. To help the analyst formulating efficiently effective criticality assessments of the possible causes of failure, the fuzzy logic technique is adopted. Particular attention has been devoted to support the maintenance staff with a fuzzy criticality assessment model easy to implement and design. To test the proposed methodology, an actual application concerning a process plant in milling field for human consumption flour is showed in the paper.
Efficient phase‐only synthesis of contoured‐beam patterns for very large reflectarrays

This article presents an efficient phase‐only synthesis method applied to contoured‐beam reflectarrays. The method, based on the intersection‐approach concept, provides the phase distribution of the reflected field that best suits the required gain‐pattern specifications. In order to avoid undesired local minima, several successive stages, in which the tapering on the reflectarray's edge is gradually increased, are carried out to reach a final suitable result. As an example of its capabilities, the coverage of Europe is successfully synthesized. © 2004 Wiley Periodicals, Inc. Int J RF and Microwave CAE 14, 415–423, 2004.
The thin-slot and thin-arm planar spiral antenna operated with and without a ground-plane

Most planar spiral antennas are made as complementary structures, i.e. with equal slot and arm widths. This paper is a study of the properties of the thin-slot and thin-arm spiral where the slot is respectively narrower or greater than the spiral arm, and includes results for free space and in the presence of a ground plane. A numerical study is conducted for a range of arm-to-slot ratios, from 5% to 95% where 50% is the complementary case. The results show that changing the arm-to-slot ratio can be used to vary the input impedance, but that the thin-arm case is of limited practical value. Results are compared to theoretical expectations and independent numerical results. As an introduction, a discussion on the band theory and a physical insight into the power flow near the antenna is presented.
NullSpace and AutoRegressive damage detection: a comparative study

In this paper we present the application of two damage detection methods to a laboratory tower. The first method is based on subspace identification. The second one is based on AutoRegressive modeling of the signals involved. Both methods are tested in a tower demonstrator simulating a wind turbine. They are able to correctly detect damage in the structure that is simulated by loosening some of the bolts in the joints. The results show that the first method is computationally more efficient, but the results are more stable with the second method.
Gate Current Modeling and Optimization of High-k Gate Stack MOSFET Structure in Nano Scale Regime

In this paper, an analytical model has been developed for gate tunneling current in nano scale MOSFET with high-k dielectric stack as gate insulator. A computationally efficient model for gate tunneling current through different high-k gate stack structure is presented. The proposed model has been successfully used for different gate stack dielectric simply by adjusting two fitting parameters. The model predictions are compared with the two-dimensional Santaurus device simulation. Good agreement between the model predictions and device simulation results has been obtained. The effects of interfacial oxide thickness, type of gate stack and reverse gate stack on the gate tunneling current have also been studied as a function of gate voltages for a given equivalent oxide thickness (EOT) of 1.0 nm. It was also shown that smaller inter oxide layer thickness reduces gate leakages current with the introduction of high-k gate stack structure in place of individual high-k dielectric or SiO2.
AUTOMATED SEGMENTATION OF TEETH IN MULTI-SLICE CT IMAGES

Automatic quantification of teeth is of clinical importance for various computer assisted procedures such as dental implant, orthodontic planning, face, jaw, and cosmetic surgeries. In this research, we present a multi-step approach based on geometric types of active contours, i.e., level set together with panoramic re-sampling of the dataset. In the proposed approach, after obtaining the head mask, bony tissues are classified from non-bony tissues by a level set technique. Next, the teeth are segmented from other bony tissues by imposing the anatomical constraint associated with intensity of teeth in the jaws. The proposed method is followed by estimating the arc of the upper and lower jaws and panoramic re-sampling of the data set. Separation of upper and lower jaws and initial segmentation of teeth are preformed by employing the horizontal and vertical projections of the panoramic data set, respectively. In this case, an initial mask for each tooth is obtained. We then relocate the initial mask on the original data set and apply the level set algorithm to refine each initial boundary to the final tooth contour. Experiments in the presence of ten CT volumetric data sets confirm the success of the algorithm.
A review of ET measurement techniques for estimating the water requirements of urban landscape vegetation

Increasing urbanisation combined with population growth places greater demands on dwindling water supplies. This is especially the case in arid and semi-arid areas like Australia, which is known as the driest inhabited continent on earth. Sustainable irrigation management necessitates better understanding of water requirements in order to decrease environmental risks and increase water use efficiency. Although the water requirements of agricultural crops are well established in field and laboratory studies, little research has been conducted to investigate the water requirements of urban green spaces. In addition, most previous research investigations have focused on the water requirements of turf grasses and not on other landscape plant species. Landscape plants can include various species of trees, shrubs and turf grasses with different planting densities and microclimates. Such complicated environments make measuring the water requirements of urban landscapes difficult. This paper reviews previous studies and techniques for measuring the water requirements of urban landscapes and describes how optimum irrigation management strategies for urban landscape vegetation can assist in better water conservation, improved landscape quality and reduced water costs. The authors conclude that WUCOLS is a practical approach that can provide an initial estimate of urban landscape water demand but ideally this should be further refined based on the health and aesthetic condition of the urban vegetation. The authors recommend calibration of the WUCOLS estimates with an in-situ method such as a soil water balance.
Variation of microstrip losses with thickness of strip

The attenuation in microstrip lines has been calculated by relating the longitudinal components of current to the charge profiles of a static solution. The calculation has been performed for varying thicknesses of strip to examine the mechanism of loss for very thin strips, where the penetrating fields from both surfaces of the strip overlap. The results are presented in the form of a universal loss curve for the particular geometries studied, indicating the minimum thickness of strip to be used to advantage.
Ultra-compact highly-selective dual-mode pseudoelliptic filters

An innovative ultra-compact dual-mode waveguide filter is presented. The basic idea consists of using a pair of TMmn0 degenerate cavity modes, while non-resonant modes provide a direct input-to-output coupling. In this manner, the single cavity provides two reflection and two transmission zeros, and is at the same time very compact in the longitudinal direction. Theoretical and experimental results of a two-cavity filter with four transmission zeros demonstrate the feasibility of the approach.
A Nested Extreme Response Surface Approach for Time-Dependent Reliability-Based Design Optimization

A primary concern in practical engineering design is ensuring high system reliability throughout a product's lifecycle, which is subject to time-variant operating conditions and component deteriorations. Thus, the capability of dealing with time-dependent probabilistic constraints in reliability-based design optimization (RBDO) is of vital importance in practical engineering design applications. This paper presents a nested extreme response surface (NERS) approach to efficiently carry out time-dependent reliability analysis and determine the optimal designs. This approach employs the kriging model to build a nested response surface of time corresponding to the extreme value of the limit state function. The efficient global optimization (EGO) technique is integrated with the NERS approach to extract the extreme time responses of the limit state function for any given system design. An adaptive response prediction and model maturation (ARPMM) mechanism is developed based on the mean square error (MSE) to concurrently improve the accuracy and computational efficiency of the proposed approach. With the nested response surface of time, the time-dependent reliability analysis can be converted into the time-independent reliability analysis, and existing advanced reliability analysis and design methods can be used. The NERS approach is compared with existing time-dependent reliability analysis approaches and integrated with RBDO for engineered system design with time-dependent probabilistic constraints. Two case studies are used to demonstrate the efficacy of the proposed NERS approach.
A hybrid approach for word emotion recognition

In recent years, with plenty of online resources constantly emerging, emotion recognition in text has become increasingly important in human–computer interaction. Word emotion plays a very important role in emotion analysis of sentences or documents. This paper proposes a hybrid approach to recognition of word emotion in the dimension of eight emotion categories with corresponding intensities based on the Chinese emotion corpus. First, we present a new algorithm of semantic similarity computation for aiding emotion intensity computation and design a new algorithm of emotion vector computation by making use of both morpheme characteristics and semantic relations. And then, we adopt support vector machine model for the secondary classification to the words whose emotions cannot be calculated by the semantic analysis algorithm. Our approach achieves the accuracy of 54.00% and 78.75% for exact match and all five types of hit, respectively, on the basis of the core emotion lexicon CL4. Experimental results show that the integration of morpheme characteristics and semantic relations can improve the classification accuracy efficiently. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Drivers’ Seat Belts Detection at Crossroads Based on OpenCV

Considering the limitations of current approaches of traffic detection after the new traffic laws are introduced, an intelligent detection system of driver’s seat belts is proposed based on OpenCV in this paper. It is combined with the appliance of linear fitting method, straight line detection method and gray integral projection method. Thus, whether the drivers wear their seat belts or not can be analyzed and judged by the system from acquired images, which can ensure the road traffic security and the safety of drivers and help to increase the efficiency of the police. We can accurately distinguish the drivers’ violation and realize the intelligent transportation.
Design and Implementation of a Remote Monitor System on Potted Flowers

To meet the management requirement of potted flowers, a maneuverable and low-cost wireless monitoring system on the potted flower is designed in this paper. The system includes measuring module, data read and control module, remote wireless communication module and cloud storage module. The Arduino UNO platform is the core control module for this system, and the WiShield module is used as the wireless communication module. And, YL-69, GY-30 and SHT1x sensors constitute the data acquisition module. This system realized the acquisition of the air temperature and humidity, soil humidity and illumination, which were transmitted to the Yeelink platform to be saved or be used for online monitoring by the wireless communication module. This system is easy to be deployed, and has the features of low costs and good scalability.
Digital signal processing for high spectral efficiency optical networks

Digital signal processing (DSP) for high spectrum efficiency transmission system are investigated in both long-haul and short haul optical networks. For long-haul transmission, two different super-Nyquist WDM systems based on advanced post (receiver side) and pre (transmitter side) DSP are demonstrated and studied. A novel DSP scheme for this optical super-Nyquist filtering 9-QAM like signals based on multi-modulus equalization (MMEQ) without post filter are proposed and experimentally demonstrated, which directly recovers the Nyquist filtered QPSK to a 9-QAM like signal. This improved filtering tolerance and transmission performance are demonstrated in an 8-channel 112-Gb/s wavelengthdivision- multiplexing (WDM) experiment with a 25GHz-grid over 2640-km single-mode fiber (SMF). Alternatively, a novel digital super-Nyquist signal generation scheme is proposed to further suppress the Nyquist signal bandwidth and reduce the channel crosstalk without using optical pre-filtering and using. Only optical couplers are needed for super- Nyquist WDM multiplexing. Using this scheme, we successfully generate and transmit 10 channel 32-GBaud (128-Gb/s) PDM-9-QAM signals within 25-GHz grid over 2975-km at a net SE of 4 bit/s/Hz (after excluding the 20% soft-decision FEC overhead). We extend the DSP for short haul optical transmission networks by using high order QAMs. We propose and experimentally demonstrate a high speed CAP-64QAM system using direct modulation laser (DML) based on direct detection and digital equalizations. Decision-directed least mean squares (DD-LMS) are used to equalize the CAP- 64QAM. Using this scheme, we successfully generate and transmit up to a record 60-Gb/s CAP-64QAM over 20-km stand single-mode fiber (SSMF) based on the DML and direct detection.
Applicabilité des Equations de Distribution de Vitesses dans les Ecoulements en Canal Ouvert à fond rugueux

On cherche ici à valider l’utilisation de profils de vitesses en canal ouvert à fond rugueux, formules logarithmiques ou fondées sur un principe d’entropie maximale. Pour atteindre cet objectif, 24 expériences de laboratoire, avec plus de 1200 points de mesures, ont été réalisées. Le nombre de Reynolds varie de 3.4 104 a 1.7 105, et le rapport entre largeur (B) et profondeur (H) de 4.2 a 12.0. Les équations ne représentent pas bien la distribution de vitesse près du lit rugueux, ni près de la surface libre lorsque la vitesse maximale ne se trouve pas atteinte en surface (dip effect). Parmi les équations logarithmiques, la formulation de Coles se montre la meilleure en toutes régions d’écoulement. L’équation de l’entropie de Chiu présente de bons résultats, quoique s’écartant des résultats expérimentaux près du lit. Si le paramètre M est calculé par l’expression proposée ici, l’équation de Chiu devient meilleure en toutes circonstances. Les données expérimentales ont permis de formuler des expressions empiriques associant la rugosité au coefficient de résistance de Darcy-Weisbach et au nombre de Froude. Des investigations permettent de conclure ce qui suit. (1) En écoulement rugueux, la décroissance de la vitesse au voisinage de la surface de l’eau (dip effect) est toujours observée quand le rapport d’aspect B/H est inférieur à 5 ; il est observé seulement près du mur latéral quand 10 < B/H < 5 ; il n’est pas observé quand B/H > 10. (2) Pour les trois équations logarithmiques étudiées, l’équation de Coles est la meilleur (erreur 6.8%) et la distribution de vitesse est suffisament précise, sauf près du lit rugueux. (3) Si l’équation basée sur le principe d’entropie maximale de Chiu est utilisée avec le paramètre M calculé par l’expression traditionelle, il y a des divergences considérables près du lit (erreur 9.9%). Néanmoins, si on utilise la nouvelle expression proposée ici pour calculer M, l’équation de l’entropie présente une performance plus précise (erreur 4.0%). (4) Les expériences menées dans le cadre de cette recherche ont montré que l’équation de Chiu et Tung, pour évaluer la localisation de la vitesse maximale, a produit des résultats relativement précis: la position relative calculée (h/H = 0.17) est proche de la position mesurée (h/H = 0.21).