Miracle-dz/UniFAR-FTUs huggingface dataset:
Weighted Dynamic Aggregation Modeling of Grid-Following Inverters to Analyze Renewable DG Integrated Microgrids

This article proposes weighted dynamic aggregation (WD agg) model for grid-following inverters and their controllers in applications such as photovoltaic (PV) farms or any renewable distributed generation (DG) integrated microgrids. The order and structure of the proposed WD agg model is similar to one inverter of the large-scale system. For example, the WD agg model of a PV farm becomes an equivalent single PV array, single inverter, and a controller with weighted average parameters, which hugely reduces the computational burden of the system studies. The parameter weights of each inverter are obtained based on the contribution of each unit in the overall dynamic behavior of the system. The proposed model can be used to mimic the steady-state, transient, and dynamics behavior of the system, and it can also be used to design controller and inverters parameters to ensure desirable performance of the large-scale system. The performance of the proposed method is simulated and experimentally evaluated by a small-scale PV farm consisting of three paralleled inverters with equal or unequal parameters in various inputs and stability conditions for a comprehensive study. The proposed model is also applied to CIGRE HV/MV 14-bus benchmark for renewable energies to show the functionality of the proposed model in large-scale and practical systems.
Admissible solutions for a class of nonlinear parabolic problems with non-negative data

We define a new class of admissible solutions for the parabolic problems where the theory of viscosity solutions does not apply. A typical example is the porous medium equation complemented by lower-order terms, nonlinear with respect to the gradient. In the case, the nonlinearity in the equation fails to be proper in the sense of the theory of viscosity solutions. The admissible solutions satisfy a very general comparison principle and, consequently, the corresponding initial-boundary value problems are well-posed in this class. They coincide with the standard viscosity solutions provided the nonlinearity in the equation is proper.
Hidden Feature-Guided Semantic Segmentation Network for Remote Sensing Images

For semantic segmentation of remote sensing images, convolutional neural networks (CNNs) have proven to be powerful tools. However, the existing CNN-based methods have the problems of feature information loss, serious interference by clutter information, and ignoring the correlation between different scale features. To solve these problems, this article proposes a novel hidden feature-guided semantic segmentation network (HFGNet) for remote sensing images, which achieves accurate semantic segmentation by hierarchically extracting and fusing valuable feature information. Specifically, the hidden feature extraction module (HFE-M) is introduced to suppress the salient feature representation to mine more valuable hidden features. Meanwhile, the multifeature interactive fusion module (MIF-M) establishes the correlation between different features to achieve hierarchical feature fusion. The multiscale feature calibration module (MSFC) is constructed to enhance the diversity and refinement representation of hierarchical fusion features. Besides, the local-channel attention mechanism (LCA-M) is designed to improve the feature perception capability of the object region and suppress background information interference. We conducted extensive experiments on the widely used ISPRS 2-D Semantic Labeling dataset and the 15-Class Gaofen Image dataset. Experimental results demonstrate that the proposed HFGNet has advantages over several state-of-the-art methods. The source code and models are available at https://github.com/darkseid-arch/RS-HFGNet.
Production of ultrahigh-current-density ion beams by short-pulse skin-layer laser–plasma interaction

We report experimental evidence, supported by a simple theory and numerical calculations, that the skin-layer subrelativistic interaction of a short (⩽1ps) low-energy (<1J) laser pulse with a thin preplasma layer in front of a solid target can produce a collimated fast ion flux of extremely high ion current density (⩾1010A∕cm2 close to the target), comparable to those predicted for ballistically focused ion beams from relativistic laser–plasma interactions.
Frequency-shaped cost functionals - Extension of linear-quadratic-Gaussian design methods

The linear-quadratic-Gaussian method for feedback control design is extended to include frequency-shaped weighting matrices in the quadratic cost functional. This extension provides a means to meet classical design requirements with automated computational procedures of modern control theory. A design algorithm to optimize frequency-shaped cost functional requires definition of new states and the solution of a modified linearquadratic-Gaussian problem. Four examples are presented to demonstrate frequency shaping methodology: 1) aircraft in lateral wind, 2) an industrial crane, 3) vibration control in helicopters, and 4) a system with truncated modes.
IRAS F15307+3252: A Hyperluminous Infrared Galaxy at Z = 0.93

A new hyperluminous infrared galaxy in the Infrared Astronomy Satellite (IRAS) Faint Source Catalog is identified at a redshift of 0.93. This object has a bolometric luminosity of approximately 10(exp 13) solar luminosity, a very large ratio of infrared-to-optical luminosity, warm dust emission, a ratio of infrared-to-radio flux densities consistent with other infrared galaxies, and an optical spectrum similar to a Seyfert 2 galaxy. IRAS F15307+3552 shares these characteristics and its radio-to-optical spectral energy distribution with two other infrared galaxies, F10214+4724 and P09104+4109. Discovery of a third object with these properties defines an extreme subclass of ultraluminous galaxies powered primarily by star formation. The systematic method used to find this object begins the process of determining the space density of these most luminous examples of the infrared galaxy phenomenon.
Laser and nonlinear properties of the potassium gadolinium tungstate laser crystal KGd(WO4)2:Nd3+-(KGW:Nd)

S. I. Vavilov State Optical InstituteState Research CenterScientiﬁc Research and TechnologicalInstitute of Optical Materials ScienceSt. Petersburg 193171, RussiaAbstract. The mechanical, thermophysical, spectroscopic, nonlinear,and laser properties are presented for one of the most efﬁcient lasercrystals: neodymium-doped potassium gadolinium tungstate,KGd(WO
Music Deep Learning: Deep Learning Methods for Music Signal Processing—A Review of the State-of-the-Art

The discipline of Deep Learning has been recognized for its strong computational tools, which have been extensively used in data and signal processing, with innumerable promising results. Among the many commercial applications of Deep Learning, Music Signal Processing has received an increasing amount of attention over the last decade. This work reviews the most recent developments of Deep Learning in Music signal processing. Two main applications that are discussed are Music Information Retrieval, which spans a plethora of applications, and Music Generation, which can fit a range of musical styles. After a review of both topics, several emerging directions are identified for future research.
First report of invasive thrips, Thrips parvispinus (Karny) infestation on chilli from Eastern part of India

The South East Asian thrips, Thrips parvispinus (Karny) was first reported in India on Papaya in 2015 later it spread to many host plants such as cowpea, Dahlia rosea, cotton etc. The severe infestation on chilli was reported from southern states during last two years and the extent of loss was more than 50 percent. Therefore, a quick roving survey was conducted to monitor the thrips infestation in chilli at farmer fields of Varanasi and Mirzapur districts of Uttar Pradesh, India. The molecular barcoding of thrips infesting chilli at Varanasi and Mirzapur district of Uttar Pradesh confirmed to be the species as Thrips parvispinus. Therefore, it’s a first report of extended distribution to eastern part of India (Uttar Pradesh). The average number of thrips per three leaves and per flower was 9.1 and 3.1 in Varanasi while in Mirzapur it was 9.3 and 5.1 respectively. The T. parvispinus attained pest status in eastern part of India. The neighbor joining tree indicated certain level of genetic diversity in the species reported from different host plants. Farmers complained about severe crop loss and failure of many insecticides to control them, it may be attributed insecticide resistance
Passively mode-locked Nd:YVO4 picosecond laser with oblique incidence on SESAM

We report an oblique incidence on semiconductor saturable absorber mirror (SESAM) method in the LD pumped passively mode-locked Nd:YVO4 picosecond laser in this article, making SESAM as the intracavity reflecting mirror, which produces maximum average output power of 1 W, pulse repetition rate of 120 MHz, and stable continuous mode-locked pulse at 1064 nm with the pulse width of 19.2 ps. To our knowledge, this was the first demonstration that got CW mode-locking in standing-wave laser with a reflected mirror SESAM in oblique incidence way.
Evidence for Mental-model-based Reasoning: A Comparison of Reasoning with Time and Space Concepts

Johnson-Laird (1983) has argued that spatial reasoning is based on the construction and manipulation of mental models in memory. The present article addresses the question of whether reasoning about time relations is constrained by the same factors as reasoning about spatial relations. An experiment is reported that explored the similarities and the differences in the performance of subjects in comparable spatial and temporal reasoning tasks. The results indicated that, in both the temporal and the spatial content domains, the data were in agreement with the view that subjects solved problems by constructing models in memory rather than with a logical rule conceptualisation of reasoning. An analysis of the premise-reading times on the basis of premise-linking order provided support for an on-line process of mental models construction, and offered an explanation for the finding that spatial problems that did require an inference of transitivity were easier than problems that did not. No essential differenc.
Nodal sets of solutions of elliptic and parabolic equations

Some geometrical properties such as convexity and star-shapedness of level sets of positive solutions to elliptic or parabolic equations have been studied via various authors (see an excellent lecture set of notes by B. Kawohl, [ 81 and the references therein). One reason to choose star-shapedness and convexity, other than other properties, as geometrical properties, is that they can be easily described and are accessible to variational and maximum principles in analysis. Here we are interested in some general questions regarding level sets of solutions to elliptic and parabolic equations, such as the size (i.e., HausdorB measure of appropriate dimension) and the topology of these level sets and estimates on critical point sets, etc. The study of such problems was motivated by the study of moving defects in evolution problems of harmonic maps and liquid crystals (see [lo]). In [lo], I have studied a model for the evolution of nematic liquid crystals. The singular set of optical axes (i.e., defects) of liquid crystal in motion can be described precisely by the nodal set of solutions to certain parabolic equations. Recently, there were several rather interesting articles studying the nodal sets of eigenfunctions of Laplacians on a compact Riemannian manifold by Donnelly and Feffermann [ 2 1, [ 3 ] or, generally, solutions of second-order elliptic equations in Hardt and Simon [ 61. The present work can also be viewed as a natural extension of [2], [3], and [ 61. Our main result can be stated as:
Gas in early-type galaxies: cross-fuelling in late-type-early-type pairs?

We present 12 CO (J = 1-0) and 12 CO (J = 2-1) observations of eight early-type galaxies, forming part of a sample of interacting galaxies, each consisting of one late- and one early-type system. All of the early-type galaxies observed are undetected in CO to low levels, allowing us to place tight constraints on their molecular gas content. Additionally, we present H I absorption data for one system. The implications for possible gas transfer from the late- to the early-type galaxy during the interaction are discussed.
Examining contract modifications in purchasing personal protective equipment: A bargaining approach

This paper presents a bargaining model of contract outcomes as a function of contract uncertainties associated with critical supply purchasing after a crisis. It examines contract modifications and termination. The model yields the following results: (1) contract modification by the government alone (unilateral modification) does not change the optimal contract; (2) contract modification by mutual agreement (bilateral modification) makes the optimal contract dependent on product price, acquisition costs, transaction costs, and uncertainty; (3) mutual contract modifications are affected negatively by government costs of contract modification and are affected positively by supplier's costs of contract modification; (4) the government may find it necessary to terminate a contract if the contract elasticity of government utility is zero, and the contractor may want to terminate the contract when its supply price equals the acquisition price.
Hydrodynamic Dispersion in Networks of Capillaries of Random Permeability

Hydrodynamic dispersion in networks of capillaries of random permeabilities is calculated with an exact method for various widths of the permeability distribution. When scaled with an adequate dispersion length Ld, the dependence of the dispersion coefficient D on the Peclet number Pe is independent of disorder. Results show the relation between dispersion and flow rate fluctuations, and are consistent with a percolation model for wide permeability distribution. They are in good agreement with experimental data obtained for sandstone and sintered glass beads.
Motion of ground moving targets and implications for aided recognition

In air-to-ground radar imaging, the motion characteristics of ground moving vehicles are often ignored or implicitly assumed as being trivial. A pilot study conducted during September 2000 suggested that the motions are in fact far from simple. Results have been gained from a controlled experiment that measured the 3-axis rotation behaviour of a variety of military vehicles transiting different terrain. Typical rotation rates as high as 30/spl deg/ s/sup -1/ were seen in more than one axis of rotation for a tracked vehicle moving at speed off-road, and these rates are encountered up to 2% of the time. These results suggest that significant attention should be paid to typical motion characteristics when considering moving target identification and imaging problems.
Gamma Attenuation Features of White Cement Mortars Reinforced by Micro/Nano Bi2O3 Particles

This study aims to explore the radiation protection properties of white mortars based on white cement as a binder and Bi2O3 micro and nanoparticles in proportions of 15 and 30% by weight as replacement sand. The average particle size of micro- and nano-Bi2O3 was measured using a transmission electron microscope (TEM). The cross-sectional morphology and distribution of Bi2O3 within the samples can be obtained by scanning electron microscopy (SEM), showing that nanoscale Bi2O3 particles have a more homogeneous distribution within the samples than microscale Bi2O3 particles. The shielding parameters of the proposed mortars were measured using the HPGe detector at various γ-ray energies emitted by standard radioactive point sources 241Am, 133Ba, 60Co, 137Cs, and 152Eu. The experimental values of the prepared mortars’ mass attenuation coefficients (MAC) match well with those determined theoretically from the XCOM database. Other shielding parameters, including half value layer (HVL), tenth value layer (TVL), mean free path (MFP), effective electron density (Neff), effective atomic number (Zeff), equivalent atomic number (Zeq), and exposure buildup factor (EBF), were also determined at different photon energies to provide more shielding information about the penetration of gamma radiation into the selected mortars. The obtained results indicated that the sample containing 30% by weight of nano Bi2O3 has the largest attenuation coefficient value. Furthermore, the results show that the sample with a high concentration of Bi2O3 has the highest equivalent atomic numbers and the lowest HVL, TVL, MFP, and EBF values. Finally, it can be concluded that Bi2O3 nanoparticles have higher efficiency and protection compared to microparticles, especially at lower gamma-ray energies.
Planetary Companions to HD 136118, HD 50554, and HD 106252

Precise Doppler observations at Lick Observatory have revealed a substellar companion orbiting the F9 V star HD 136118 with an orbital period P = 1209 ± 24 days, velocity semiamplitude K = 212 ± 6 m s−1, and eccentricity of 0.37 ± 0.025. The assumed stellar mass of 1.24 M⊙ yields a Keplerian companion with Msin i = 11.9 MJ and semimajor axis of 2.3 AU. We also confirm the orbital solutions for two previously announced planets, one orbiting the F8 V star HD 50554 and one orbiting the G0 V star HD 106252. Our orbital solution for HD 50554 yields P = 1254 ± 34 days, K = 78.5 ± 6.7 m s−1, and e = 0.51 ± 0.06. The assumed stellar mass of 1.065 M⊙ implies a companion mass Msin i = 3.7 MJ and semimajor axis of 2.2 AU. For HD 106252, we find P = 1503.3 ± 62 days, K = 150.9 ± 25 m s−1, and eccentricity e = 0.57 ± 0.11. The assumed stellar mass of 0.96 M⊙ implies Msin i = 6.96 MJ and semimajor axis of 2.42 AU.
Grain Surface Recombination of HCO+

We investigate the recombination of the HCO+ ion on grain surfaces. This process is a key reaction in dense regions such as protoplanetary disks. The branching fraction among intact desorption, dissociation, and desorption with dissociation has been analyzed by a classical trajectory approach. It is found that dissociation (with or without desorption) dominates over intact desorption.
Highly selective epoxidation of styrene over mesoporous carbon support with titanium dioxide under ambient photocatalytic condition

The main purpose of this paper was to design a novel structure mesoporous carbon composite materials and develop economic and green photocatalytic oxidation process for common chemical reaction intermediates of styrene oxide under ambient condition based on the basic principle of environmentally friendly chemistry. Order mesoporous silica was prepared by conventional hydrothermal method using triblock copolymer as template agent, and then order mesoporous carbon materials were synthesized via a simple template method by adding sucrose to the sulfuric-acid-treated mesoporous silica and followed by carbonization and removal template of mesoporous silica on account of inverse replica effects. The composite mesoporous carbon materials assembled in situ anatase TiO2 of different contents were obtained through impregnation and sintering at 700℃ for 2h in nitrogen atmosphere for both removal of unhydrolyzed tetrabutyl titanate and crystallization of titanium dioxide. All the composite catalysts had been unambiguously characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscoscopy, scanning electron microscopy, and high-resolution transmission electron microscopy, etc. Structural and morphological of prepared carbon materials showed that the typical ordered mesoporous structure was maintained after TiO2 insertion and active component of TiO2 was uniformly distributed in mesoporous carbon channels. A variety of reaction parameters such as molar ration of H2O2 to the styrene, reaction time, solvent, the amount of catalyst and so on were optimized at length for epoxidation of styrene with H2O2 as the oxidant over prepared composite catalysts under photo-irradiation. The results indicated that reaction conversion reached over 30% with 90% selectivity under the photocatalytic condition for room temperature, 0.50g of styrene, 2.00g of H2O2(30%wt%), 0.200g of catalyst and 3h reaction time. This process strategy for green photocatalytic oxidation under ambient condition was expected to be applied to other organic synthesis processes as a general environmentally benign chemical means.
Assessing compression algorithms to improve the efficiency of clustering analysis on AIS vessel trajectories

Abstract In the maritime environment, the Automatic Identification System (AIS) is used to monitor vessel activity concerning security and safety ocean-wide. AIS data has been used to detect anomalous behaviors related to suspicious activities and hazardous events. Typically, clustering analysis is used to investigate anomalous events within the AIS data stream. However, the main challenge in this approach is to determine and execute the dissimilarity measure between trajectories since they differ in size and time. In addition, these calculations are computationally expensive and not scalable. To tackle this issue, compression algorithms can be applied to perform clustering analysis since they are typically used to reduce storage and processing time. Therefore, the proposed analysis will assess how compression algorithms affect clustering results with respect to detecting anomalous vessel trajectories. The analysis results show that a suitable compression algorithm can reduce the overall processing time with little impact on the clustering results while supporting the scalability of this type of analysis.
Effect of Polylactic Acid Membrane on Guided Bone Regeneration in Anterior Maxillary Implantation

Background This study evaluated the clinical efficacy of polylactic acid (PLA) membranes in guiding bone regeneration in anterior maxillary implants. Material/Methods Forty-eight participants with maxillary anterior tooth loss requiring implantation with guided bone regeneration were recruited and randomly divided into 2 groups (n=24): the PLA membrane (experimental) and the Bio-Gide membrane (control) group. Wound healing was observed at 1 week and 1 month postoperatively. Cone beam CT was performed immediately and at 6 and 36 months postoperatively. Soft-tissue parameters were measured at 18 and 36 months postoperatively. Implant stability quotient (ISQ) and patient satisfaction were separately evaluated at 6 and 18 months after the operation. The independent sample t test and chi-square test were preformed to analyze quantitative and descriptive statistics, respectively. Results No implants were lost and there were no statistically significant differences in ISQ between the 2 groups. The labial bone plates in the experimental group exhibited a non-significantly greater extent of absorption than did the control group at 6 and 18 months postoperatively. Soft-tissue parameters did not reveal inferior results for the experimental group. Patients in both groups were satisfied. Conclusions PLA membranes are comparable to Bio-Gide in terms of the effectiveness and safety and can be used as a barrier membrane to guide bone regeneration in clinical practice.
Unconditionally stable locally one dimensional wave equation PML algorithm for truncating 2‐D FDTD simulations

Unconditionally, stable locally one dimensional (LOD) scalar wave equation (WE) perfectly matched layer (PML) formulations are presented for truncating two dimensional (2‐D) open region finite difference time domain (FDTD) grids. The proposed formulations remove the Courant Friedrichs Lewy (CFL) stability limit of the explicit FDTD algorithm and require solving less field equations as compared with the alternating direction implicit (ADI) WE‐PML formulations. Numerical example carried out in 2‐D domain is included to show the validity of the proposed formulations. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 18–22, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22976