Miracle-dz/UniFAR-FTUs huggingface dataset:
First Complete Genome Sequence of a Hare Calicivirus Strain Isolated from Lepus europaeus

The first full-genome sequence of a hare calicivirus (HaCV), recently characterized as a novel member of the Caliciviridae, is described. This presumed nonpathogenic lagovirus is 7,433 nucleotides long, shows the same genomic organization as that of other lagoviruses, and has the highest nucleotide identity (79%) with pathogenic European brown hare syndrome viruses. ABSTRACT The first full-genome sequence of a hare calicivirus (HaCV), recently characterized as a novel member of the Caliciviridae, is described. This presumed nonpathogenic lagovirus is 7,433 nucleotides long, shows the same genomic organization as that of other lagoviruses, and has the highest nucleotide identity (79%) with pathogenic European brown hare syndrome viruses.
Smartphone-based Pedestrian Localization Algorithm using Phone Camera and Location Coded Targets

With the rapid development of national economy, higher requests have been put forward on indoor and outdoor seamless PNT (positioning navigation and timing) service. Meanwhile, with the popularity of smartphones and the rapid development of MEMS (microelectromechanical system) sensors, researches on smartphone-based high-precision, high-reliability, but low-cost seamless indoor/ outdoor navigation method have become the highlighted topics. On the basis of the detailed analysis of smartphone camera’s capability, this paper analyzed the method of coded targets aided pedestrian navigation techniques. With digitalized BIM (building information model), this paper proposed an algorithm for fast, precisely and robustly recognizing and matching artificial targets, from which the position and orientation of camera can be deduced and helps to improve the locating performance of smartphone. Laboratory experiments have been carried out to verify the feasibility of this vision-aided method: the locating precision of the proposed algorithm can reach cm level, whose exposure time is 50us and its corresponding process time is about 33ms, which could be of great use for the seamless indoor and outdoor locating with off-the-shelf smartphone.
A New Detection Method for Stack Overflow Vulnerability Based on Component Binary Code for Third-Party Component

Security testing of Component Object Model (COM) is an active area of research in the software engineering community. This is partly due to the increase in security related issues (referred to as vulnerabilities) reported by users. Although many papers have been published on Component Object Model, very little attention has been paid to the detection of stack overflow vulnerability in software component. This paper presents a method to detect stack overflow vulnerability of binary code of a component. We first convert the buffer overflow problem as an integer constraints problem. We then scan the different buffers according to the types of risk function parameters to establish a function library for all the risks COM components. Finally, we compare the used buffer size and the declared buffer size to identify the stack overflow vulnerability. The experimental result shows that the proposed method is capable of detecting COM components' stack overflow vulnerability. The introduced SBOD (stack buffer overflow detection) algorithm is a promising direction to assist software engineers who seek to detect stack overflow vulnerability in order to improve software quality.
Draft Genome Sequences of Five Methicillin-Sensitive Staphylococcus aureus Isolates from Skin Lesions in Patients with Atopic Dermatitis in the Russian Federation

We present here draft genome sequences of five Staphylococcus aureus strains obtained from children suffering from atopic dermatitis. The strains were determined to be of five different sequence types (sequence type 1 [ST1], ST7, ST8, ST15, and ST101) and carried a unique combination of superantigen-like protein (SSL) and serine protease genes. ABSTRACT We present here draft genome sequences of five Staphylococcus aureus strains obtained from children suffering from atopic dermatitis. The strains were determined to be of five different sequence types (sequence type 1 [ST1], ST7, ST8, ST15, and ST101) and carried a unique combination of superantigen-like protein (SSL) and serine protease genes.
Dynamics Modeling of a Magnetic Spherical Joint Based Parallel Brain Surgery Robot

In this paper, a 5 degree-of-freedom parallel brain surgery robot is introduced. The proposed brain surgery robot consists of a two rotational degree-of-freedom end effector and a three translational degree-of-freedom linear Delta positioning platform. In order to eliminate the clearance exists in traditional spherical joint, magnetic spherical joint is adopted to construct the linear Delta positioning platform. Inverse kinematics of the positioning platform is derived. Further, velocity analysis and acceleration analysis are carried out. Based on which, inverse dynamics of the positioning platform is modeled based on the principle of virtual work. Relationship between the motion and actuation force is obtained. The derived dynamic model is implemented and verified in MATLAB software.
Purification and characterisation of a sulphur rich melanin from edible mushroom Termitomyces albuminosus Heim

ABSTRACT Production, purification and characterisation of a black pigment from Termitomyces albuminosus as melanin is reported, for the first time, from shaken submerged culture condition using scanning electron microscopy (SEM), elemental analysis, ultraviolet–visible (UV-VIS), and Fourier transformed infrared spectroscopy (FTIR), electron paramagnetic resonance (EPR) and 13C (CP/MAS) NMR spectra. SEM results on T. albuminosus revealed nanogranular nature of melanin nanoparticles within size range of 400–100 nm with fractal dimension D = 1.195–1.73. Elemental analysis of melanin indicated 54.6% C, 3.5% H, 2.4% N, 26.9% O, and 12% S. UV-VIS and FTIR spectra confirmed to the characteristic of melanin and were identical to the reference commercial sepia melanin. Further validation of the identity of pigment as melanin was achieved by EPR analysis. Termitomyces albuminosus melanin is postulated to be DOPA-type melanin confirmed by 13C (CP/MAS) NMR spectral analysis showing chemical shift at 200–170 ppm carbonyl, 160–110 ppm aromatic region, and with high 40–30 ppm open chain aliphatic region. Chemical modification through oxidation and cysteinylation (Pheomelanin) is implied as indicated by relatively high sulphur content (12%).
A Three-Port Three-Phase DC-AC Topology Based Multi-Functional Grid-Connected Inverter with Enhanced Conversion Efficiency

A novel multi-functional grid-connected inverter (MFGCI), composed of a three-port three-phase DC/AC converter and a front-end DC/DC converter, is investigated and evaluated in this paper. A low voltage DC source can exchange most energy with the AC grid only through the DC/AC converter and only partial power needs to be processed by the DC/DC converter. Therefore, power conversion stages can be reduced and overall conversion efficiency is improved. To make sure most active power can be transferred directly from the DC source to the AC grid within single-stage conversion, a modified SVPWM strategy is adopted and evaluated experimentally. Impact factors on the single-stage power transferring when the MFGCI compensates reactive and harmonic currents for power quality enhancement is analyzed in detail as well. Compared with traditional solutions, the presented MFGCI can realize active power delivery with high efficiency in addition to enhancing power quality. Experimental results with a 5kVA inverter prototype are provided to verify the feasibility and effectiveness of the three-port three-phase DC/AC converter-based MFGCI.
Automated Optimization of Longitudinal Tensile Reinforcement in RC Beam Using Binary PSO Algorithm

Automation is currently inadequate in the architecture, engineering and construction (AEC) industry. The entire workflow of architectural design is based on manual computation or semi-automation computer software. Design of longitudinal tensile reinforcement is a crucial and essential task in designing reinforced concrete (RC) beam. This paper presents a framework using a binary particle swarm optimization algorithm (BPSO) to automatically design of longitudinal tensile reinforcement in RC beam. The optimization framework will select the required longitudinal bars, such as the type, number and diameter of the reinforcement by minimizing the area of the reinforcement. Meanwhile, buildability constraints and industry design codes (GB50010-2010) are considered in the framework. The experimental results show that the result of automatic optimization meets the requirement of reinforcement design, and the whole calculation process is fast, efficient and achieves the expected goal.
Analysis and Comparison of Two Harmonics Control Alternatives for the Jacking System VFD of a Liftboat: Pseudo 24 Pulse Configuration and Active Power Filters

This study outlines a methodology to estimate the harmonics control performance of a pseudo 24 pulse Variable Frequency Drive (VFD) arrangement serving the jacking system of an existing liftboat. A similar methodology is followed to estimate performance in a hypothetical case in which the same system serves the same loads under the same operating conditions, but with no harmonics control in place. Such hypothetical performance is used to determine design characteristics of Active Power Filters (APFs) to be installed as an alternative to the pseudo 24 pulse system, along with line reactors. A comparison of key aspects between both types of systems is presented in terms of weight, footprint, performance, and relative cost.
Resolved motion rate and resolved acceleration servocontrol of wheeled mobile robots

The authors apply two Cartesian-space manipulator control algorithms, resolved motion rate (kinematics-based) and resolved acceleration (dynamics-based) control, to wheeled mobile robot (WMR) servo control. They evaluate simulation studies of two exemplary WMRs-Uranus, a three-degree-of-freedom WMR, and Bicsun-Bicas, a two-degree-of-freedom WMR-under the control of these algorithms. Although resolved-motion-rate servo control is adequate for the control of Uranus, resolved-acceleration servo control is required for the control of the mechanically simpler Bicsun-Bicas because it exhibits more dynamic coupling and nonlinearities. <<ETX>>
Dual-Band Circular Polarization Reconfigurable Antenna

In this paper a dual-band circular polarization reconfigurable antenna based on printed monopole is proposed and studied. Right-hand circular polarization (RHCP) and lefthand circular polarization (LHCP) can be realized at around 3.5 GHz (WiMAX band) and 5.6 GHz (WLAN band) using only two switches placed on the annular ground plane. The circular polarization is realized by using the switches to connect the annular ground and the strips. The polarization reconfigurability is achieved by controlling the states of the switches. The switches are replaced by two copper patches in this paper. The key antenna parameters are studied and optimized using computer simulation and the simulated performances are presented.
Wideband Dual-Polarized Grid-Shape Antenn with Cross-Slot Coupled Feed

A wideband dual-polarized grid-shape antenna is proposed in this paper. The proposed antenna consist of a ground, feeding structure, radiating patch and reflector. There is a cross slot etched in the ground which is used to feed the patch. There are two ports are used to generated two orthogonal polarization to enlarge the communication capacity. The simulated S-parameter for both two ports can cover the band of 1.68-2.75GHz (about 48.3% bandwidth) under the − 10dB condition, the isolation is bigger than 19.5dB at the working band. The simulated gains for two ports are range from 7.3dBi to 8.5dBi. The simulated 3D patterns are also presented in this paper.
Analysis on AC Loss of DC HTS SFCL Coils Due to AC Ripple Current in MMC-Based DC System

In this paper, a DC system based on MMC converter is developed in PSCAD/EMTDC to analyze the AC ripple characteristic. Then, two DC HTS SFCL coils without and with iron yokes are investigated and compared by 2D FEM models, given that the AC ripple current consists of high order and low order harmonics in MMC-based DC system. The AC loss in the coil with iron yokes is lower than that without iron yokes 39%, which indicates AC loss due to AC ripple current can be effectively reduced by iron yokes. The result of this paper can provide some reference to the rational design of DC HTS SFCL and corresponding cryogenic systems.
A System Architecture for Constraint-Based Robotic Assembly with CAD Information

A system architecture is presented to generate sensor-controlled robot tasks from knowledge encoded in a CAD model. This architecture consists of an application layer where the user annotates assembly tasks in the CAD software. A process layer infers the specific robot skills and parameters from the CAD model and annotated data. A control layer executes the complex, force-controlled tasks. A proof-of-concept implementation is made, consisting of an application layer implemented in FreeCAD and a process layer that focuses on using fuzzy inference to generate appropriate skill-dependent process parameters from the geometric CAD information and annotations in the CAD model. In the control layer, a constraint-based control framework is used to robustly execute the assembly tasks. The system is validated on a challenging assembly task involving the assembly of screw compressor parts.
A stable tracking control method for an autonomous mobile robot

A stable tracking control rule is proposed for nonholonomic vehicles. The stability of the rule is proved through the use of a Liapunov function. Inputs to the vehicle are a reference posture (x/sub r/, y/sub r/, theta /sub r/)/sup t/ and reference velocities ( nu /sub r/, omega /sub r/)/sup t/. The major objective of this study is to propose a control rule to find reasonable target linear and rotational velocities ( nu , omega )/sup t/. Linearizing the system's differential equation is useful for deciding parameters for critical dumping for a small disturbance. In order to avoid slippage, a velocity/acceleration limitation scheme is introduced. Several simulation results are presented with or without the velocity/acceleration limiter. The control rule and limiting method proposed are robot independent and hence can be applied to various kinds of mobile robots with a dead reckoning ability. This method was implemented on the autonomous mobile robot Yamabico-11. Experimental results obtained are close to the results with the velocity/acceleration limiter. <<ETX>>
H2D4-Type Single Phase Transformer-Less Inverter with Reactive Power Control for Grid-tied PV System

Transformer-less inverter is popular for grid-tied photovoltaic (PV) system due to low cost, smaller size and higher efficiency. However, one of the technical challenges, which need to be handled carefully, is the issue of leakage current. Moreover, an inverter must be capable of controlling the reactive power to a certain extend to maintain the power factor (PF) close to unity. Therefore, many inverter topologies have been proposed. In this paper, a new four diodes and two IGBT switch based H2D4-type highly efficient transformer-less inverter is proposed that can handle the issue of leakage current maintaining low total harmonic distortion (THD) and higher PF where the common mode (CM) voltage is maintained constant. As a result, the leakage current deceases and the conduction loss as well as size of the system is decreased due to minimum number of IGBT switches. Furthermore, two control systems are proposed to control the reactive power with desire PF. The comparison among proposed H2D4 topology and conventional neutral point clamped (NPC) and H6 topology have been analyzed in this paper. To validate the accuracy of the theoretical analysis, the compared topologies are simulated in MATLAB/Simulink software. It is found that the PLL and PI closed loop control based H2D4 inverter topology controls the reactive power maintaining a low current THD with higher efficiency and high PF as compared to the system with only PI control based topology.
A Preliminary Study on Positioning of an Underwater Vehicle Based on Feature Matching of Seafloor Images

This study presents an algorithm to estimate the displacement of an underwater vehicle from the seafloor videos collected by the vehicle itself. The algorithm is developed based on image feature detection and matching. In this algorithm, the first step is to extract consecutive partially overlapped images from the collected seafloor video. Next is to correct the radial distortion in the images. Considering that the vehicle's attitude is changing with time while conducting seafloor imaging, tangential distortion in the images is corrected for the tilts of the image plane onboard the vehicle camera. The Scale Invariant Feature Transformation (SIFT) method is then adopted to detect and match features in an image sequence. During the interval between two consecutive images, the vehicle displacement in pixel units is estimated from the matched feature points in these two images. The last step of the algorithm is converting the displacement from pixels into units of physical length. The performance of the proposed feature-based positioning algorithm was evaluated based on a 10-minute seafloor video collected in 2015 by using the Fiber-optical Instrumentation Towed System (FITS) at the Yuan-An Ridge off southwest Taiwan.
A 1.2-dB Noise Figure Broadband GaAs Low-Noise Amplifier with 17-dB Gain for Millimeter-Wave 5G Base-Station

A 24-30GHz low-noise amplifier (LNA) with 1.2-dB noise figure (NF) is designed for millimeter-wave 5G stations. The LNA has 2 stages, 1st stage utilizes common-source topology with source degeneration inductor for simultaneous noise and input match. 2nd stage uses the same structure for staging match and the trade-off between gain and noise optimization. A structure of parallel resistor and capacitor is utilized for bandwidth and stability. Simulation result shows that the LNA achieves peak gain of 17.8-dB, and the 1-dB bandwidth is over 6-GHz. NF is below 1.35-dB in the bandwidth.
TF: A Novel Filtering Approach to Find Temporal Frequent Itemsets in Recommender Systems

In recent years, information overload has become a serious problem. There are many recommender system algorithms which help people make decisions about what they want. However, many traditional recommender system algorithms ignore temporal information. In order to utilize temporal information, we propose a new method to find Temporal Frequent Itemsets and improve traditional recommender system algorithms. Our method can combine well with other algorithms. In addition, our method is tend to recommend newly-risen items and avoid to recommend out-of-date items for users. We use our method in two real-world datasets. The results show that the performance of our algorithm is more excellent than the performance of state-of-the-art algorithms.
Multifrequency Current Control for Multiphase Machines With Antiwindup, Distortion-Free Saturation and Full DC-Link Utilization

Multiphase drives offer important advantages over three-phase ones; e.g., lower per-phase rating and enhanced fault tolerance. For multiphase machines, multifrequency current control (MCC) is often required, e.g., for harmonic cancellation or injection. In certain situations, converter output voltage (OV) saturation (OVS) occurs, which can cause windup and additional OV distortion. For MCC, obtaining antiwindup and distortion-free OVS, with full dc-bus exploitation, entails extra complexity. Recent publications address this problem in three-phase and dual three-phase (treated as two independent three-phase) systems with one and two isolated neutrals, respectively. However, extending such solutions to drives of any phase number $n$, winding arrangement (symmetrical or asymmetrical) and neutral configuration is not straightforward. This paper proposes a general MCC scheme, including antiwindup and distortion-free OVS with full dc-link utilization, for $n$-phase machines with different winding arrangements (symmetrical or asymmetrical) and neutral configurations. Simulation results are provided.
Repurchase Prediction Based on Ensemble Learning

With the development of the network and the popularization of smart phones and computers, E-commerce is developing rapidly. In order to occupy more market shares, merchants sometimes run big promotions on particular dates. Unfortunately, many of the attracted buyers are one-time deal hunters, and these promotions may have little long lasting impact on sales. To alleviate this problem, it is important for merchants to identify who can be converted into repeated buyers. By targeting on these potential loyal customers, merchants can greatly reduce the promotion cost and enhance the return on investment. According to the idea of ensemble learning in machine learning, this paper proposes a two-layer model fusion algorithm(TMFBG) based on GBDT to predict repeat buyers. The algorithm is validated on the publication data from the behavior data of certain customers of the yearly "Double 11" on Tmall platform. The experimental results show that this fusion algorithm can improve the prediction precision and the model robustness.
A Unidirectional Flying Chain-link Modular Multilevel Rectifier (FCL-MMR) with Reduced Energy Storage for Offshore Wind Integration

In recent years, the Modular Multilevel Converter (MMC) has been widely recognised as the state-of-art for AC/DC conversion stages in the integration of offshore wind energy through HVDC links. The MMC guarantees high power quality, efficiency, reliability and flexibility. However, in applications where the power flow is mostly unidirectional, the capabilities of the MMC are not fully exploited, resulting in a converter whose weight and volume are not optimised. This aspect is particularly challenging in offshore applications where the platform cost is a key factor. A more traditional solution could be the use of an AC/DC converter based on diode rectifiers, providing minimum size and complexity at the cost of poor AC power quality, requiring large active/passive filters. This paper proposes a new unidirectional AC/DC converter, named Flying Chain-link Modular Multilevel Rectifier (FCL-MMR), that combines a three-phase diode rectifier with modular chain-links of submodules (SMs) that enable the control of sinusoidal AC currents and, if needed, the exchange of reactive power with the offshore AC grid. This is achieved with a limited number of submodules characterized by low energy storage requirements. The conversion concept and the theoretical analysis are presented and SM selection criteria is discussed. The proposed converter has been validate in Plecs simulation.
Compact UHF RFID Tag Antenna for Platform Tolerant Applications

A compact UHF RFID tag antenna is proposed for platform tolerant applications. The antenna structure consists of a T-matching network and a folded patch with a V-shaped parasitic in it. Resulting from the folded structure, the antenna volume is reduced to $26\text{mm}\times 26\text{mm}\times 7\text{mm}(0.08\lambda\times 0.08\lambda\times 0.02\lambda)$. In order to enhance the bandwidth, the V-shaped parasitic patch is introduced to generate one more resonant mode. With proximity-coupling feed besides the T-matching network, the conjugate matching between the antenna and the chip is realized. Simulation results show that the -3 dB impedance bandwidth of the proposed antenna in free space and mounted on water or metal are 67 MHz (868–935 MHz), 31 MHz (901–932 MHz) and 37 MHz (893–930 MHz) respectively. It means the band of 902–928 MHz can be covered by the tag antenna in various platforms.