Miracle-dz/UniFAR-FTUs huggingface dataset:
DeepETA: A Spatial-Temporal Sequential Neural Network Model for Estimating Time of Arrival in Package Delivery System

Over 100 million packages are delivered every day in China due to the fast development of e-commerce. Precisely estimating the time of packages’ arrival (ETA) is significantly important to improving customers’ experience and raising the efficiency of package dispatching. Existing methods mainly focus on predicting the time from an origin to a destination. However, in package delivery problem, one trip contains multiple destinations and the delivery time of all destinations should be predicted at any time. Furthermore, the ETA is affected by many factors especially the sequence of the latest route, the regularity of the delivery pattern and the sequence of packages to be delivered, which are difficult to learn by traditional models. This paper proposed a novel spatial-temporal sequential neural network model (DeepETA) to take fully advantages of the above factors. DeepETA is an end-to-end network that mainly consists of three parts. First, the spatial encoding and the recurrent cells are proposed to capture the spatial-temporal and sequential features of the latest delivery route. Then, two attention-based layers are designed to indicate the most possible ETA from historical frequent and relative delivery routes based on the similarity of the latest route and the future destinations. Finally, a fully connected layer is utilized to jointly learn the delivery time. Experiments on real logistics dataset demonstrate that the proposed approach has outperforming results.
Novel in-situ synthesis of hydroxyapatite/titanium oxide composite coatings on titanium by simultaneous anodization/anaphoretic electrodeposition

In-situ synthesis of HAp/TiO2 coating on titanium was performed via anaphoretic deposition of HAp and simultaneous anodization of Ti to produce highly adherent and strengthened composite coating. The prepared coatings were characterized by field emission scanning electron microscopy, X-ray diffraction and electron dispersive spectroscopy. HAp on anodized titanium was prepared at constant voltage of 60 V and deposition time of 45 s, which provided uniform and adherent HAp/TiO2 composite coating on Ti. Since smaller size of HAp crystals within highly porous coating structures is of improved binding ability to various biomolecules, our coating is expected to be of excellent coverage and compactness. The obtained coating can be good candidate for bone implants due to reduced brittleness and improved adhesion.
Computational investigation of crack inducing forces on bearing surfaces regarding the tribofilm structure

To reduce wear in tribosystems, the formation of a protective tribofi lm is benefi cial. by applying additives to the lubricating oil or grease, an anti-wear boundary layer can be achieved. For simulating the induced stresses on the bearings surface, the formed tribofi lm should be regarded. In this study, cylindrical roller thrust bearings were investigated regarding a tribofi lm formed by oil containing zinc dialkyldithiophosphate (ZDDP) additives. Due to the test conditions, a smooth fi lm with low roughness forms on the surface. The fi lm consists of glassy Fe/Zn polyphosphates with a height of up to 150 nm and a width of approximately 1 μm. based on the roughness, the surface was modelled with regularly distributed dimples to be used for a fi nite element model for the contact between a roller and a bearing washer regarding contact stress and tangential forces due to slip. The dimples in the contact between roller and washer lead to an inhomogeneous pressure distribution near the surface. During the contact, the surface pads of the roller partly slide over the surface pads of the washer in dependence of the contact position. of particular interest is the deformation in running direction. If the asperities of the roller press against th e washers asperities, a signifi cant deformation at the dimples and in the volume underneath occurs. As expected, the strains occur in the regions with high deformation gradients. During rolling, the deformations lead to areas that are stretched and compressed. The maximum strains are located between the dimples and shift in rolling direction from pad to pad. It has to be assumed, that the formation of cracks starts between the dimples at the surface and develop along the stretched areas whereas the cracking in the compressed areas is suppressed or at least impeded. The simulative results were compared to literature proving that the values determined by simulation are in well agreement.
Fabrication and investigation on the properties of ilmenite (FeTiO3)-based Al composite by accumulative roll bonding

In the present study, the aluminum (Al) 1050–FeTiO3 composite was fabricated through accumulative roll bonding process, and the resultant mechanical properties were evaluated at different deformation cycles at ambient temperature. The effect of the addition of FeTiO3 particle on the microstructural evolution and mechanical properties of the composite during accumulative roll bonding was investigated. The Al–2, 4, and 8 vol.% FeTiO3 composites were produced by accumulative roll bonding at room temperature. The results showed improvement in the dispersions of the particles with the increase in the number of the rolling cycles. In order to study the mechanical properties, tensile and hardness tests were applied. It was observed that hardness and tensile strength improve with increasing accumulative roll bonding cycles. The microhardness and tensile strength of the final composites are significantly improved as compared to those of original raw material Al 1050 and increase with increasing volume fraction of FeTiO3, reaching a maximum of ∼75 HV and ∼169 MPa for Al–8 vol.% FeTiO3 at seventh cycle, respectively.
The spatial-temporal transfer of scientometrics research topics based on citation analysis

In this study, the spatial-temporal transfer of research topics in the field of scientometrics was analysed through citation analysis and information visualization tools such as CiteSpace and Google Fusion Tables software. We collected 12,839 articles, including 214,748 references, about citation analysis in Science Citation Index-Expanded (SCI-E) and Social Science Citation Index (SSCI) databases for the period of 1971 to July 2016 as the data source. We obtained the following findings: The transfer of central research topics in the field of scientometrics is accelerating. There have been three milestones: the middle of the 1990s, 2005, and 2010. The number of central research topics has also changed from one between 1971 and 1993 to two after 1994 and three after 2008. At the same time, the geographical centres of scientometrics research showed a general shift from the US and Britain to Italy, the Netherlands, Belgium, Spain, and China. At present, the countries that are centres of research include the Netherlands, US, Belgium, China, Spain, and Italy. There is a close positive correlation between the transfer of the central research topic and the transformation of the country to a centre of research. The countries acting as centres of research enjoy not only a high output of literature, but also a great academic influence. Both the theoretical and practical implications of the results are discussed.
Automating lexical simplification in Dutch

We discuss the design, development and evaluation of an automated lexical simpliﬁcation tool for Dutch. A basic pipeline approach is used to perform both text adaptation and annotation. First, sentences are preprocessed and word sense disambiguation is performed. Then, the diﬃculty of each token is estimated by looking at their average age of acquisition and frequency in a corpus of simpliﬁed Dutch. We use Cornetto to ﬁnd synonyms of words that have been identiﬁed as diﬃcult and the SONAR500 corpus to perform reverse lemmatisation. Finally, we rely on a large-scale language model to verify whether the selected replacement word ﬁts the local context. In addition, the text is augmented with information from Wikipedia (word deﬁnitions and links). We tune and evaluate the system with sentences taken from the Flemish newspaper De Standaard. The results show that the system’s adaptation component has low coverage, since it only correctly simpliﬁes around one in ﬁve ‘diﬃcult’ words, but reasonable accuracy, with no grammatical errors being introduced in the text. The Wikipedia annotations have a broader coverage, but their potential for simpliﬁcation needs to be further developed and more thoroughly evaluated.
Properties of composite wood panels fabricated from Eastern redcedar employing various bio-based green adhesives

Bio-based flours derived from distiller’s dried grains with solubles (DDGS), Osage orange seed meal (OOSM), or defatted commercial soybean meal flour-Prolia (PRO) were employed as adhesives with Eastern redcedar (Juniperus virginiana L.) wood (ERC) to fabricate composite wood panels (CWPs). OOSM and DDGS were defatted, milled, and screened prior to use. PRO was employed as provided. DDGS, OOSM, or PRO flour were mixed dry with ERC wood to make CWPs using the following conditions: molding temperature of 185 °C, ERC particle sizes of ≤75 µm to 1700 µm, pressure of 5.6 MPa, and employed in flour dosages of 10% to 75%. Flexural properties of DDGS and OOSM flour-ERC composites were similar to composites fabricated using PRO as the resin/adhesive. The dimensional stability properties (water absorption and thickness swelling) of all composites were similar. ERC CWP properties satisfied several European Committee Industry Standards for commercially acceptable CWPs in terms of their flexural properties but were inferior in terms of thickness swelling when subjected to water immersion testing. Surface roughness and color analysis of CWPs were also conducted. Statistical correlations between surface roughness and color properties and the composition of the CWPs were conducted. ERC CWPs were found to have termite resistance.
Evaluation of Low Cycle Fatigue Performance of Selective Laser Melted Titanium Alloy Ti–6Al–4V

The material of Ti–6Al–4V has been widely applied in various industries, such as automobile, aerospace, and medical due to its high specific strength, superior thermal stability and strong corrosion resistance. In the recent decades, selective laser melting (SLM) has become an attractive method to fabricate Ti–6Al–4V parts, thanks to its significant advantages in low material consumption, the high degree of freedom in design, low carbon footprint, etc. Predictability of SLM material fatigue properties is especially important for the safety-critical structures under dynamic load cases. The present research is aimed at evaluating the low cycle fatigue (LCF) performance of SLM Ti–6Al–4V under high loading states. LCF tests were performed for as-built and annealed SLM Ti–6Al–4V. Comparison between LCF properties of SLM Ti–6Al–4V and the wrought Ti–6Al–4V was also made. It was found that as-built SLM Ti–6Al–4V demonstrated a comparable LCF performance with the wrought material. The LCF life of as-built SLM Ti–6Al–4V was longer than that of wrought Ti–6Al–4V at lower strain amplitudes. However, the wrought Ti–6Al–4V had better LCF performance at higher strain amplitudes. The results revealed that the porosity in the as-built SLM material exerted much more impact on the degradation of the material at high strain amplitudes. Annealing deteriorated the LCF performance of SLM Ti–6Al–4V material due to the formation of coarser grains. The cyclic Ramberg–Osgood and the Basquin–Coffin–Manson models were fitted to depict the cyclic stress–strain and the strain–life curves for the SLM Ti–6Al–4V, based on which the LCF performance parameters were determined. In addition, the fatigue fracture surfaces were observed by using scanning electron microscopy (SEM), and the results indicated that fatigue cracks originated from the surface or subsurface defects.
High Short-Circuit Current Density via Integrating the Perovskite and Ternary Organic Bulk Heterojunction

We demonstrate a record short-circuit current density (28.06 mA/cm2) in a single-junction perovskite solar cell with a 1.6 eV bandgap absorber. We achieve this by integrating a ternary organic bulk heterojunction structure into a perovskite top layer to extend the photoresponse to the near-infrared region.
Simulation Investigation of Operational Conditions of Rotor for High-Speed Compound Helicopter

Abstract The article presents results of simulations concerning possibilities of rotorcraft performance enhancements for compound helicopters with introduced additional wings and propellers. The simple model of helicopter including a point mass of fuselage and a rotor treated as a disk was used for calculations of helicopter flight equilibrium conditions. For the defined flight states, the more detailed model of elastic blade was applied to compute magnitude of rotor loads and level of blade deformations. The model of elastic blade includes out-of-plane bending, in plane bending, and torsion effects due to variable aerodynamic and inertial loads of rotor blades. Equations of motion of rotor blades are solved applying Runge-Kutta method. Taking into account Galerkin method, parameters of blade motion are computed as a combination of assumed torsion and bending Eigen modes of the rotor blade. The six-bladed rotor with stiff connections of blades and hub was applied for comparison of flight envelope for conventional helicopter and versions of compound rotorcraft with additional propellers and with wings and propellers. Simulations indicate that, in the case of compound helicopter configuration, achieving the operational flight conditions at high speed of 400 km/h is possible without generating excessive loads and blade deformations. The results of calculations of rotor loads and generated blade deflections are presented in form of time-run plots and as rotor disk distributions, which depend on radial and azimuthal positions of blade elements. The simulation investigation may help to define demands for rotor of high-speed helicopter.
Structure and Phase Composition of Ti-6Al-4V Samples Produced by Direct Laser Deposition

In this article has carried out X-ray phase analysis of the samples obtained using direct laser deposition. Two groups of samples were studied: the first one was obtained with oscillation of laser radiation, the second one – without. The investigations have shown that in the process of direct laser deposition, the α+β phase is formed from a Ti-6Al-4V titanium alloy with oscillation of laser radiation.
Theoretical and experimental investigations on nano-finishing of internal cylindrical surfaces with a newly developed rotational magnetorheological honing process

In the current scenario, the advanced industries are using highly sophisticated types of machinery. These types of machinery use numerous cylindrical components made with superior materials and technology. For obtaining the nano-level finished interior cylindrical surface with high accuracy and high production rate, a newly developed rotational magnetorheological honing (R-MRH) process is employed on the cylindrical objects. This process is applicable in internal nano-finishing of cylindrical molds, hydraulic and pneumatic valves, aerodynamic bearings, gears, cylindrical barrel, and cylinders used in medical devices, etc. In the present work, the cylindrical workpiece is also made rotational in the reverse direction of the MRH-tool rotation unlike the existing MRH process. The rotating motion of the workpiece cylinder caused an increment in relative motion of the active abrasive particles against the interior surface of the workpiece cylinder. The effect of the rotational speed of the workpiece cylinder along with movements of the MRH-tool on change in surface roughness is investigated theoretically and experimentally in this work. Theoretically, it is found that the simultaneous motions of tool and cylindrical workpiece in the opposite direction to each other increase the finishing rate. To validate the theoretically increased finishing rate due to the rotating cylindrical workpiece, and to examine the effect of the rotational motion of the cylindrical workpiece on finishing performance, the experiments are conducted with the R-MRH process. The reduction in surface roughness is found as 71.71% in 60 min with the existing MRH process for the stationary cylindrical workpiece, whereas it is reduced to 83.83% in only 40 min with the R-MRH process for the rotational cylindrical workpiece. The significant change in surface roughness value with reduced finishing time validates the improved efficacy of present R-MRH process for its more utility in industries.
Structural stability of SrZrO3 perovskite and improvement in electronic and optical properties by Ca and Ba doping for optoelectronic applications: a DFT approach

ABSTRACT A detailed theoretical study, based on density functional theory (DFT) with GGA-PBE, of electronic, optical and structural properties of calcium (Ca) and barium (Ba)-doped SrZrO3, is presented. The doping influence on the electronic structure and consequently optical properties are analysed and explained with TDOS and PDOS. Structural parameters vary by partial replacement of strontium (Sr) atom with Ca and Ba in SrZrO3, separately, and PDOS modify themselves with the development of new states at symmetry points and as a result reduction in the electronic band gap is observed. We have also noticed that the indirect band gap of pure SrZrO3 is altered to the direct band gap after doping. The optical properties of the pure and doped SrZrO3 are interrelated with their electronic determinations. The considerable change in the band structure and optical properties by doping of Ca and Ba assert that the doped material is a more attractive contestant for optoelectronic device applications as compared to pure SrZrO3.
Review of Chatbots Design Techniques

Recently, the development of conversational system as a medium of conversation between human and computer have made a great stride. This human and computer communication has covered the way for enormous natural language processing techniques. A chatbot is a computer system that allows human to interact with computer using natural language. The chatbots system are widely used in various field such as in businesses, education, healthcare and many more. The design and development of chatbots involves variety of techniques. Therefore, in this paper, we presents the review of techniques used to design Chatbots. A few examples of chatbots design is also discussed to give an understanding on how chatbots works and what are the type of approaches available for chatbots development. With rapid development in Chatbots technology, it is hoped that it could complement human constraints and optimize the productivity.
Effect of La Doping on ZnO Thin Films by Spray Pyrolysis

In this study, Zinc oxide (ZnO) undoped and Lanthanum doped (ZnO: La) thin films were deposited on 400°C heated glass using spray pyrolysis technique with moving nozzle. The components (Zn (CH3COO)2, 2H2O) and (LaCl3, 7H2O) were used as sources to produce ZnO thin film and doped Lanthanum, respectively. Effects of dopant on the optical and structural properties of undoped and 0, 2 and 4 wt. % Lanthanum doped ZnO thin films were studied. Optical transmittance spectra of the films showed high transparency of about 98% in visible region. The optical gap for ZnO and 0, 2 and 4 wt. % La doped ZnO thin films were found to be in 3.25-3.28 [eV] range. The X-ray diffraction showed that the thin films have hexagonal wurtzite structure with a strong (002) as preferred orientation, whereas the crystalline size was ranged in 15.89-33.45 nm. The ZnO thin films are promising to be used a light emitting diodes, gas sensor and UV detectors applications.
Chemical Doping of Well-Dispersed P3HT Thin-Film Nanowire Networks

We demonstrate the preparation of uniformly distributed poly(3-hexylthiophene) (P3HT) nanowire (NW) networks on a variety of substrates. We studied changes in the optical, electronic, and morphological properties upon sequential doping by 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) by UV–vis spectroscopy, atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM), and electrical conductivity measurements. At a moderate dopant concentration of 250 μg/mL, the P3HT NW networks retain their morphological features with a clear evolution of an absorption band corresponding to doping products. Higher dopant concentrations (∼1 mg/mL) lead to the accumulation of dopant molecules on the surface of the film, forming “dot-like” features. KPFM measurements show a clear difference in the contact potential difference (CPD) of the P3HT NWs with varying doping concentration regimes. Moreover, an increase in the electrical conductivity by 4 orders of magnitude from 10–5 to 10–1 S/cm is observed a.
Generation of Silver Nanoparticles by the Pin-Hole DC Plasma Source with and without Gas Bubbling

Silver nanoparticles were produced using the pin-hole discharge generated by dc non-pulsing high voltage directly in silver nitrate solutions. Sodium nitrate was alternatively added to increase solution conductivity and decrease input energy for the discharge breakdown. Argon or oxygen was bubbled through the discharge region. Comparative experiments were evaluated by UV-VIS spectrometry. Formation of silver nanoparticles with the average size of 100 nm was confirmed by SEM/EDS analysis.
Functional evolutionary convergence of long noncoding RNAs involved in embryonic development

A strategy to discover equivalent lncRNAs by k-mer content and secondary structure similarity, reveals functional convergence of embryonic development related lncRNA EVX1AS. Long noncoding RNAs have been identified in most vertebrates, but the functional characterization of these molecules is challenging, mainly due to the lack of linear sequence homology between species. In this work, we aimed to find functional evolutionary convergent lncRNAs involved in development by screening of k-mer content (nonlinear similarity) and secondary structure-based approaches combining in silico, in vitro and in vivo validation analysis. From the Madagascar gecko genes, we have found a non-orthologous lncRNA with a similar k-mer content and structurally concordant with the human lncRNA EVX1AS . Analysis of function-related characteristics together with locus-specific targeting of human EVX1AS and gecko EVX1AS-like (i.e., CRISPR Display) in human neuroepithelial cells and chicken mesencephalon have confirmed that gecko EVX1AS-like lncRNA mimics human EVX1AS function and induces EVX1 expression independently of the target species. Our data shows functional convergence of non-homologous lncRNAs and presents a useful approach for the definition and manipulation of lncRNA function within different model organisms.
Improving the Quality of Parts Produced by Bending in a Die with an Elastic Element

The process of less than 90 degrees angle bending is presented in this article. Elastic-plastic deformation took place in the sample. After removing the force, the effect of elastic spring-back occurs – the angle of the part is increased by a value that depends on many parameters. The usage of an elastic element in the stamp allows us to change the angle of spring-back. This is happened doe to adjusting the height of the press stroke. This allows us to produce parts with accurate dimensions.