Miracle-dz/UniFAR-FTUs huggingface dataset:
Disappearing Link Prediction in Scientific Collaboration Networks

It is a common sense that both the formation and dissolution of links are the fundamental processes of link dynamics in network organization. Previous studies have analyzed the formation of links with predicting missing links in current networks and new links in the future. However, little attention has been paid to the disappearing link prediction problem. In this paper, we investigate the disappearing link prediction problem. First, we define the disappearing link prediction in scientific collaboration networks. In contrary to the missing link prediction, we use structural similarity indices to estimate the disappearing links through dissimilarity of the node pairs. Then, we propose a novel method called modified preferential attachment (MPA) for predicting disappearing links. MPA is designed based on the preferential attachment considering both links’ weights and the different impacts of the nodes’ neighbor links. Finally, we evaluate the performance of MPA based on three real scientific collaboration networks extracted from Digital Bibliography & Library Project and American Physical Society datasets. Meanwhile, we explore the performance of the classical similarity methods on disappearing link prediction. The experiment results show that MPA achieves better performance than other classical similarity indices, which verifies the effectiveness of MPA.
Draft Genome Sequence of Erwinia dacicola, a Dominant Endosymbiont of Olive Flies

Erwinia dacicola is a dominant endosymbiont of the pestiferous olive fly. Its genome is similar in size and GC content to those of free-living Erwinia species, including the plant pathogen Erwinia amylovora. ABSTRACT Erwinia dacicola is a dominant endosymbiont of the pestiferous olive fly. Its genome is similar in size and GC content to those of free-living Erwinia species, including the plant pathogen Erwinia amylovora. The E. dacicola genome encodes the metabolic capability to supplement and detoxify the olive fly’s diet in larval and adult stages.
Bistatic MIMO Sonar Space-Time Adaptive Processing Based on Knowledge-aided Transform

In this paper, we derive the space-time adaptive processing (STAP) signal mode of the bistatic Multiple-Input Multiple-Output (MIMO) sonar system in reverberation background and present a new knowledge-aided (KA) STAP method based on a transform that jointly exploit the spectral property of the target-free guard cells and the persymmetric structure of the reference covariance matrix to reformulate target-free reference data. While using only a quarter of the reference guard cells as the sample matrix inversion (SMI) method, the presented KA method has nearly the same signal-to-interference-plus-noise ratio (SINR) loss and spatial beampattern performances as the SMI. The mean SINR loss value of the KA method is about 12 dB better than that of the loaded sample matrix inversion (LSMI) method at the same reverberation background.
Time-optimal trajectories for a robot manipulator: a provably good approximation algorithm

An algorithm is presented for generating near-time-optimal trajectories for an open-kinematic-chain manipulator moving in a cluttered workspace. This is the first algorithm to guarantee bounds on the closeness of an approximation to a time-optimal trajectory. The running time and space required are polynomial in the desired accuracy of the approximation. The user may also specify tolerances by which the trajectories must clear obstacles in the workspace to allow modeling of control errors. <<ETX>>
Encoding the Convergent Path of Cross-Disciplinary Team

At the stage of creative thinking, many designers often produce many design strategies, but as the number increases, many implied information may be lost in the process of convergence. We think through creative thinking that design thinking can be coded, as well as the nodes that define the convergence path, we can find the hidden and unfocused hidden points. Through the display of paths, designers can repeatedly review the design strategies of each stage. This preliminary exploration shows the development and positioning of future auxiliary tools.
Data-Driven Approach to Accommodating Multiple Simultaneous Sensor Faults in Variable-Gain PID Systems

This paper is concerned with the problem of data-driven fault-tolerant control for multiple simultaneous sensor drift faults in variable-gain digital PID systems with very large time constants and long dead time, which are exceedingly common characteristics of process control systems. No existing data-driven residual generation method can allow building (with low computational costs) residual variables independent of the state of these systems, and meanwhile guarantee that each of the sensor faults is mapped uniquely and entirely onto the associated residual variable. To solve the aforementioned technical difficulty, a novel residual generation technique is devised via the dead time as well as the coefficients and state of the variable-gain PID controller. On this basis, a methodology is developed for the purpose of the full-decoupling estimation of several sensor malfunctions from the residual variables. Finally, a resulting data-driven approach to compensate for the aforesaid faults is applied to a dual-chamber electric heating furnace (which is a typical process plant), so that the effectiveness and advantages of the proposed methods are verified by experiment.
Update Method of Indoor Maps Based on Volunteered Geographic Information (VGI)

With the development of mobile positioning technology and people's indoor activities continuing to increase, the indoor maps as the basis for indoor navigation to express information have become the current research hot spots. Existing methods of indoor maps are mainly based on traditional surveying, spatial entities extraction from CAD (Computer Aided Design) files or obtaining indoor maps through SLAM (Simultaneous Localization And Mapping). However, there are some problems in the above-mentioned methods, such as high data acquisition cost and poor timeliness. In order to overcome the shortcomings of the existing methods, the paper proposes an update method of indoor maps based on VGI (Volunteered Geographic Information). Firstly, the visualization scheme for indoor maps' organization and expression was put forward based on the OpenStreetMap, a VGI open source digital map. Then the key issues of updating and checking indoor maps by volunteers are proposed in the paper. Finally, based on the idea of version update, a multi-level open source architecture using Openlayers, Geoserver and PostGIS was adopted to design and implement a public indoor map service and update system, which verified the feasibility for indoor data updating based on VGI.
Study on Energy Minimization Data Transmission Strategy in Mobile Cloud Computing

With the rapid expansion of mobile cloud computing and its wide appliance, as well as the improvement of user's performance requirements for mobile terminals, it is an inevitable trend for mobile cloud computing to shift the complex computing and storage requirements of mobile terminals to the cloud for processing. Therefore, it is one of the problems to be solved in the green cloud computing that how to reduce the energy consumption of the mobile terminal and the cloud and how to improve the energy efficiency and the user experience during the data transmission process. In this paper, we focus on energy optimization in the data transfer process of mobile cloud computing. Based on the optimal stopping theory, an average transmission energy strategy for minimizing unit data is proposed with a given data generated rate and transmission delay. We construct a data transmission queue model with multiple application scenarios. Based on the secretarial problem of minimizing the average absolute ranking of candidates, an admission rule that is superior to the top k candidates is proposed to minimize the average energy consumption of unit data. Indeed, the rule has been proved that it has the best K. value. The experimental results show that the optimization strategy proposed in this paper has lower average energy per unit of data, more excellent energy efficiency, and better detection efficiency.
Evacuation Evaluation Using Machine Learning and Wearable Sensors

This research proposes a method of evacuation evaluation using machine learning techniques. Evacuation evaluation must identify when and where people tend to make abnormal movement in emergency evacuation situations. Conventional method asks plenty of manpower to detect abnormal movement time periods. Our method detects the time periods automatically, using classifier and heuristics about human movement.
A Single Source Cascaded Multilevel Inverter Based on Switched-capacitor with Series and Parallel Connectivity

A cascaded switched-capacitor (SC) multilevel inverter (MLI) achieving voltage step-up and self-balancing is presented. Unlike the conventional cascaded H-bridge (CHB) inverters, only one voltage source is required for the proposed SCMLI to produce multilevel output voltage output with increased magnitude. By employing the proposed bipolar series-parallel conversion operation, each of the SC units can produce positive and negative voltage components. This eliminates the need of high voltage unfolding H-bridge. The voltage stress of individual components in the proposed topology can be restricted to the input voltage level. Therefore, this SCMLI provides modularity for forming high voltage AC output with low voltage components. In this paper, the key features and working principle of the proposed topology are elucidated with the support of simulation and measurements.
Hyperwideband Microwave Crossover Using Bridged Suspended Substrate Line Configuration

A planar microwave crossover is presented. The structure uses a suspended substrate transmission line configuration to cross two independent RF channels. In the central crossed region, one channel is bridged by a conductor on the upper side of the substrate, while the second channel is bridged on the lower side. Two conductive stubs, realized as screws in the fabricated prototype, are placed on both sides of the crossed region to adjust the capacitance in this section and improve the impedance match of each channel. Measurements show that the overall bandwidth of the crossover with less than 0.5-dB insertion loss is from dc to 12 GHz (200% fractional bandwidth). Over this band, the measured return loss and isolation between the two channels are more than 15 and 17 dB, respectively.
An Integrated Microfluidic System for Bacteria Identification from Human Joint Fluids

An integrated microfluidic system was developed to identify bacteria in human joint fluid (HJF) in this study. The entire process including bacteria isolation in HJF, bacteria lysis, polymerase chain reaction (PCR) and optical detection could be automated on a single chip. An universal 16S rRNA primer set and four designed primers to identify Staphylococcus aureus (SA), methicillin-resistance Staphylocuccus aureus (MRSA), Escherichia coli (E. coli), and Acinetobacter baumannii $(\pmb{A}.\pmb{B}.)$ were used for bacteria identification. In addition, N-acetyl-L-cysteine for dissolving sticky mucus of HJF samples and vancomycin-coated magnetic beads were applied for bacteria isolation such that the detection limit could be significantly improved. The entire process could be automated by using a microfluidic system. Experimental results showed that the limit of detection (LOD) could be significantly improved to 100 colony formation units (CFU) per milliliter (or 20 CFU/reaction), which meets the demand on clinical diagnosis. Furthermore, the whole process could be performed within 90 minutes, which is much faster when compared to the traditional method (usually 3–7 days).
Dynamics and optimal control of a legged robot in flight phase

A discussion is presented of the control of legged-robot body orientation in flight using the internal motion of the leg. The angular momentum constraint (nonholonomic) is used to recast the problem into a nonholonomic motion planning problem. Chow's theorem is then applied to verify that the system is controllable, and the concept of holonomy is introduced for constructing an optimal path. Finally, linearization control is used in the internal motion space to realize the planned path. An additional degree of control to dynamically balance a legged robot that runs is provided with this strategy. <<ETX>>
Compact Microstrip to Empty Substrate-Integrated Coaxial Line Transition

Substrate-integrated waveguides (SIWs) are increasingly being used due to their capability of combining the advantages of planar circuits and traditional waveguides. The development of empty SIWs has substantially reduced the related insertion losses, since waves propagate through air instead of propagating through a lossy dielectric medium. Recently, a new empty coaxial structure, completely built with printed circuit boards and integrated in a substrate, has been proposed. It has been named empty substrate-integrated coaxial line (ESICL). The resulting coaxial line has low cost, easy manufacturing, low radiation, low losses, high-quality factor, and nondispersive. A transition from grounded coplanar waveguide to ESICL already exists. In this letter, a transition from microstrip to ESICL is presented for the first time. In order to demonstrate its feasibility, a back-to-back structure and a bandpass filter have been manufactured and measured.
Design and Analysis of a Wideband&High compression ratio Anglog to Information Converter

In this paper, a wideband analog to information converter front-end circuit is designed. It is based on compressed sensing theory, and sample wideband analog signal, which is sparse in the frequency domain, at the sub-Nyquist rate. Then, through Orthogonal Matching Pursuit (OMP) reconstruction algorithm, the original wideband analog signal can be reconstructed from the low rate samples accurately. The circuit is designed in SMIC18mmrf technology, occupying 132um × 111um silicon area. Simulation results show the successful reconstruction of multi-tone signals for 512MHz bandwidth. The system power consumption is estimated to be 11.86mW, while maintaining the high compress rate, ×16.
Experimental Study of Multiple-Reignition Features of Secondary Arcs on EHV/UHV Transmission Lines

When a single-phase-to-ground fault occurs in a power system, a secondary arc will normally be generated at the fault position after the fault phase has been interrupted. A detailed investigation of multiple-reignition features of secondary arcs on extra-high-voltage/ultra-high-voltage transmission lines is, therefore, very important. In this paper, an experimental setup for generating a secondary arc across a transmission-line insulator string is presented, and both the discharge waveforms and images are synchronously recorded. According to the properties of the discharge waveforms, the discharge process is divided into two stages and each stage is analyzed. The evolution of the volt–ampere characteristic and the resistance–current curve of the secondary arc is found to exhibit hysteresis during the discharge process. Multiple-reignition images of the secondary arcs are converted into binary images using image threshold processing. The arc length and breakdown voltage are discussed in association with the discharge images. Morphological changes in the secondary arc during a single discharge process are analyzed in terms of self-magnetic compression theory, and the extinction mechanism of the arc discharge is discussed on the basis of two theoretical approaches.
Total Eclipse: How To Completely Isolate a Bitcoin Peer

In the cryptocurrency world, Bitcoin holds the first place in terms of market cap and currency price, which makes it the first target and victim of attack attempts. Indeed, there are various attacks against cryptocurrencies in general and Bitcoin in particular, e.g., block withholding, transaction malleability and the Eclipse attack. The latter, allows an attacker to completely isolate a peer and to monopolize all permanent connections from/to the victim. However, in this attack, the non permanent connections, remains non monopolized by the attacker, which can disturb the attack success. In this paper, we propose (1) a characterization of the misbehavior mechanism applied by Bitcoin and its weaknesses; and (2) a new method to realize the Eclipse attack which monopolizes all the peer’s connections, even the non permanent ones, with a minimal number of IP addresses. Our characterization and attack realization, were performed on the main Bitcoin network and on a real client.
A New Deep-Sea Crawler System - MANSIO-VIATOR

The exploration of space and deep-sea environments faces significant similarities. As in space, the exploration and utilization of the deep sea is performed under extreme environmental conditions. Recently, deep sea systems are becoming increasingly autonomous, resulting in challenges that are similar to autonomous space systems such as limited energy supply, communication, as well as navigation system control and failure handling. The analogies between autonomous robotic space and deep-sea technologies motivated the German Helmholtz Association to setup the joint research program ROBEX (Robotic Exploration of Extreme environments). In this research program, scientists and engineers from both domains cooperated to find solutions to similar challenges and to mutually benefit from each other's technologies and capabilities. ROBEX consisted of a consortium of German maritime and space research institutions and was funded from 2012–2017. Within the deep-sea crawler project MANSIO-VIATOR, a consortium of marine and space-related institutes developed a new underwater system uniting the advantages of a fixed sea-floor observatory harboring a mobile crawler component to map and monitor large areas on the seafloor.
Design and Analysis of Broadband Planar Crossed Slot Antenna with Three SIW Cavity Modes

A novel broadband substrate integrated waveguide (SIW) cavity-backed slot antenna is presented in this paper. By exciting three cavity modes (TE210, TE220, and TE230 modes), the crossed slot antenna is able to generate three resonances, which lead to a wide operation band from 17.5 to 26.5 GHz (41%). The antenna exhibits a good broadside radiation and low cross polarization in the whole K band. Besides, it also shows advantages of low weight, low fabrication cost, and easy integration with planar circuits.
Measurement of Metal Grade of Ore Particles in Slurry Using Laser-Induced Breakdown Spectroscopy

This paper describes experimental works to apply Laser-Induced Breakdown Spectroscopy (LIBS) for in-situ measurement of the metal grade of ore particles handled in seafloor mineral processing system for seafloor massive sulfides. LIBS measurements of ore particles containing metallic elements in slurry were performed, where ore slurry was circulated through a chamber mounted on the optical probe of a LIBS device. The chamber was positioned to set the focal point of laser from the LIBS device at the center of the tubular space in the chamber, where the slurry runs. Analytically useful LIBS spectra were obtained from the slurry with enough slurry concentration. While relatively strong LIBS signals assigned to major elements appeared in many spectra, sharp LIBS signals assigned to minor elements appeared in a spectrum. Individual ore particles are not homogeneous even though they are prepared from single ore. The results suggest that multiple measurements are required to assess the metal grade in the seafloor mineral processing system.
Large-Scale Electromagnetic Field Analysis on Conductor Eddy Current Loss in Bar-Wound Coil Type Permanent Magnet Synchronous Motor for Automotive Applications

This paper describes a study of large-scale electromagnetic field analysis on super-computer (K-computer in Japan) in order to analyze the conductor eddy current loss of the interior permanent magnet synchronous motor using a bar-wound conductor in detail. In order to analyze the conductor eddy current loss due to the leakage magnetic flux at the typical driving point in detail, the same coil forming state as the actual prototype was modeled on the CAE and electromagnetic field analysis was performed. Furthermore, the preliminary study to reduce the conductor eddy current loss was accomplished.
Instantaneous Pulse Power Compensator for High-Power-Density Single-Phase Inverter

This paper presents an instantaneous pulse power compensator (IPPC) concept to achieve ultra-high density with zero voltage ripple and zero dc-link capacitor for high-power-density single-phase inverter application. Compared with traditional 2ndorder method with various power decoupling topologies, IPPC proposed a totally new theoretical analysis from a pulse-power point of view. For dc-link voltage ripple evaluation, traditional theoretical analysis is not suitable for small-capacitance power decoupling applications, however, pulse power analysis can be applied in the whole range. From a view of state-of-the-art on power decoupling methods, a comparison figure with voltage ripple and dc-link capacitance is given to show the limitation of traditional power decoupling method and improvement of IPPC method on minimizing dc-link capacitance. One case study is presented with full-bridge topology with simulation results. Furthermore, one Silicon Carbide (SiC) based inverter and the IPPC based circuit are built. Experimental results verify the proposed idea very well.
SDN-Based Handover Approach in IEEE 802.11p and LTE Hybrid Vehicular Networks

The vehicular ad-hoc network (VANET) has become a popular research topic, as vehicles present an indispensable transportation in our daily life. With vehicles' fast and random mobile features, VANETs always accompany with frequent changes in network topology. In order to support a highly dynamic vehicular environment, we propose an advanced handover approach where a software defined network (SDN) technology is employed. In the proposed approach, we utilize the advantages of SDN in the network control to manage the data transmission in VANETs in order to keep the transport layer's connection unchanged when a handover occurs, so that the upper layer could perform stably without the influence of network changes. To further discuss the benefits that our proposal brings about, we also conduct computer simulations from different aspects. The results show that the proposed protocol achieves a significant performance improvement when a handover happens as compared with the conventional approach.
Development of a Laboratory Rules Description Grammar Accommodating a Variety of Research Activities

When students conduct research in a university laboratory, university laboratory rules typically require that all students independently (1) plan their research, (2) record their research information, and (3) reflect on the outcomes of their research. Our goal is to develop a research activity support system that will comprehensively integrate these three important points for a wide variety of research activities. In this paper, we define research activities as a set of four tasks: planning, execution, information recording, and reflection. Then, as a step towards developing a research activity support system to organically support these four tasks, we develop a formal description method for research activities and a corresponding description grammar. Furthermore, we develop a source code generator that outputs a research activities support system, customized on specific laboratories, with the description as input.