bluuebunny/crossref_metadata_2025_split huggingface dataset:
Deterministic‐like solution to the non‐convex economic dispatch problem
Authors: El‐Sayed Wael T. , El‐Saadany Ehab F. , Zeineldin Hatem H. , Al‐Durra Ahmed , El‐Moursi Mohamed S. 
Published: November 2020

AbstractThis paper proposes a novel stochastic solution method for the static nonconvex power economic dispatch problem. All practical features such as valve point effects, ramp rate limits, prohibited operating zones, multiple fuel options, spinning reserve constraints, and transmission losses are considered. To develop the proposed algorithm, two modifications that significantly enhance the exploitation capability of the artificial bee colony algorithm are introduced. The first modification concerns onlooker and employed bees to focus their search around the best solution found so far. The second modification optimizes the escaping behavior from local minimums using scout bees. The proposed modifications form a multi‐level concentric search around the best solution found. Finally, combining the modified artificial bee colony algorithm with Levy flight cycles, which improve the escaping capability from local minimums, leads to the proposed algorithm. The algorithm parameters have been tuned to provide a deterministic‐like solution with ten benchmark problems. The improvement added by each proposed modification to the artificial bee colony algorithm has been confirmed using the Wilcoxon rank‐sum test. The obtained results by the proposed algorithm are superior compared to those reported in the literature. Moreover, estimated probabilities of more than 99.9% to obtain the global optimal solution are achieved.
An integrated model for train rescheduling and station track assignment
Authors: Meng Xuelei , Wang Yahui , Xiang Wanli , Jia Limin 
Published: November 2020

AbstractBoth train rescheduling and station track assignment have become hot topics in recent years. It is fundamentally important to do the rescheduling and track assignment work at the same time to avoid the feasibility risk of the re‐scheduled timetable. The purpose of this paper is to design an integrated model for train rescheduling and track assignment in order to provide an integrative plan for the trains to run on the railway sections and go through stations. Based on the existing train rescheduling model, the model is designed by adding the constraints and the optimization goal of track assignment. The goal of track assignment is to maximize the equilibrium of the track usage time, and the constraint is that two trains cannot occupy a same track at the same time. An artificial bee colony algorithm is used to solve the model to get the operation plan. A computing experiment was carried out to prove the effectiveness of the model and the efficiency of the algorithm. The approach presented in this paper can provide a reference for the developers of a railway dispatching system.
Phone‐vehicle trajectory matching framework based on ALPR and cellular signalling data
Authors: Wan Wei , Cai Ming 
Published: November 2020

AbstractWith the advancement of positioning techniques, a large amount of trajectory data has been produced. Matching vehicles with mobile phones using different trajectories can benefit many applications, such as driving behaviour analysis and travel mode split. Moreover, as a privacy attack method, it can provide theoretical inspiration for privacy protection theory. To address this problem, a new trajectory matching framework for processing massive Automatic License Plate Recognition (ALPR) and cellular signalling data is proposed. Information entropy was adopted to address the movement frequency of trajectories and then the infrequent vehicles and phones that did not meet the threshold were pruned. Next, an effective matching algorithm was devised to match the trajectories of vehicles and mobile phones. Moreover, to solve the problem of obtaining a small number of matching results, a data augmentation algorithm was proposed to add new, matching records. Last, a classification model was constructed with LightGBM to determine whether the vehicle matches the phone. Experimental results on real datasets show that the framework outperforms typical techniques in terms of effectiveness and efficiency. The data obtained by data augmentation have distribution characteristics similar to those of the original data. The proposed classification model achieves an accuracy of 93.6%.
Roles of positive and indirect negative evidence in L2 feature reassembly
Authors: Prawatmuang Woramon , Yuan Boping 
Published: November 2020

Abstract
This article reports an empirical study investigating L2 acquisition of the Mandarin Chinese collective marker
-men by adult Thai-speaking learners and the Thai collective marker phûak- by adult
Chinese-speaking learners within the framework of the Feature Reassembly Hypothesis (Lardiere,
2009a, 2009b). An acceptability judgment test was administered to learners
with beginning, intermediate and advanced proficiencies of Chinese and Thai (n = 114) as well as native speaker
controls (n = 30). The results reveal a facilitating role of positive evidence in L2 feature reassembly as
Chinese learners who are exposed to positive evidence of “phûak + animal noun” and “phûak +
indefinite noun” structures in their Thai input perform native-like on these structures from an intermediate level onward. On the
other hand, feature reassembly is hindered when positive evidence is unavailable as in the case of Thai learners of Chinese where
no evidence they receive in the input shows ungrammaticality of “animal noun + men” and “indefinite noun +
men” structures in Chinese. These learners mostly fail to perform native-like even at an advanced level.
Definiteness constraint on subjects in L2 and L3 Mandarin grammars
Authors: Xiang Jingting , Yuan Boping 
Published: November 2020

Abstract
Recent research on third language acquisition has been focusing on identifying the source of transfer in third language
(L3) acquisition. In this article, we report on an empirical study of a less-studied language combination of Mandarin, Cantonese and
English, which examines how speakers of Mandarin as a first, second and third language process Mandarin indefinite and definite subjects.
Our data reveals that both typologically and structurally similar and less similar languages are available for transfer in third language
acquisition, thus such transfer can be facilitative as well as detrimental. We also find that the frequency and length of exposure to the
second language (L2) and the vulnerability of the property under investigation may cause first language attrition, which could influence
third language acquisition.
High electrochemical performance of Fe2O3@OMC for lithium-ions batteries
Authors: Wang Bo , Luan Sunrui , Peng Yi , Zhou Junshuang , Hou Li , Gao Faming 
Published: November 2020

Abstract
Fe2O3@OMC (ordered mesoporous carbon) is synthesized using Fe-MOFs (metal-organic frameworks). The Fe2O3@OMC pore size is mostly concentrated at approximately 2–4 nm. Compared to traditional OMC or carbonized Fe-MOFs, Fe2O3@OMC demonstrates a higher capacity (the capacity remains at 1176.6 mAh g−1 after 500 cycles under a current density of 0.1 A g−1) and a longer cycle life. The first cycle capacity of Fe2O3@OMC is ultrahigh at 2448.6 mAh g−1, and the reversible capacity is 1294.1 mAh g−1. Fe2O3@OMC maintains a good performance under current densities of 0.1 A g−1, 0.2 A g−1, 0.5 A g−1, 1 A g−1, 2 A g−1, and 5 A g−1, with electric capacities of 1100.8 mAh g−1, 1017.6 mAh g−1, 849.3 mAh g−1, 690.7 mAh g−1, 506.7 mAh g−1, and 272.1 mAh g−1, respectively. Thus, the material has good rate performance. Combining iron oxide and MOFs is helpful to improve the capacity performance.
Unsteady boundary layer flow and heat transfer of a viscous fluid over a semi-infinite stationary flat plate: Blasius flow problem
Authors: Dholey S 
Published: November 2020

Abstract
In this paper, a class of similarity solution for the unsteady Navier–Stokes equations which describe the two-dimensional unsteady laminar boundary layer flow of a viscous incompressible fluid over a semi-infinite flat stationary plate surface has been derived. Here, the boundary layer is formed owing to an uniform free stream flow over this plate surface and the unsteadiness in this flow dynamics comes only from the similarity solution which is not yet available in the open literature. For this similarity solution the governing boundary layer equations (momentum and thermal) transform into a set of non-linear ordinary differential equations which conceive two physical parameters, namely, unsteadiness parameter γ and Prandtl number Pr. The impact of these two parameters on the unsteady boundary layer flows as well as on the heat transfer analysis have been discussed in detailed. The present analysis confirms the non-existence of the boundary layer solutions after a certain negative value of γ, while it continues for a large positive value of γ and specifically for the value of γ = 0, we get the steady boundary layer solution for the Blasius flow problem. Here, we have considered the whole range of the Pr values, which includes both the limiting cases Pr → 0 and Pr → ∞, in the discussion of the heat transfer analysis. For these two limiting cases, two approximated separate mathematical formulae for the heat transfer solutions have been derived in terms of the well-known bessel, error and hypergeometric functions, whose results for any given value of γ within the solution domain are well fitted with the corresponding numerical results.
Terahertz polarization reflective devices based on one-dimensional grating structure
Authors: Huang Zhisen , Wang Bo 
Published: November 2020

Abstract
In this paper, the application of rectangular metal reflective grating as a polarization device is studied using a rigorous coupled-wave analysis method. Three polarization reflection devices are presented in the terahertz band. In addition, data verification is achieved based on the finite element method and the light field distribution of the device is analyzed to explain the physical mechanism. One of these devices splits the planar light into two mutually orthogonal output beams. The efficiency of TE polarization is 98.07%, and the efficiency of TM polarization is 97.86%. Furthermore, the process parameters of the three polarization devices, as well as the influence of incident wavelength and incident angle on efficiencies are also studied in the terahertz band.
Entropic uncertainty relation of a qubit–qutrit Heisenberg spin model and its steering
Authors: Ju Feng-He , Zhang Zuo-Yuan , Liu Jin-Ming 
Published: November 2020

Abstract
We investigate the quantum-memory-assisted entropic uncertainty relation (QMA-EUR) in a Heisenberg XYZ mixed-spin (1/2, 1) model. Coupling strength, Dzyaloshinskii–Moriya (DM) interaction and inhomogeneous magnetic field, respectively, contributing to QMA-EUR by a thermal entanglement in the hybrid-spin model are studied in detail. Furthermore, we compare the uncertainty of the bipartite hybrid model with those of qubit–qubit and qutrit–qutrit systems. Meanwhile, the effects of local PT-symmetric operation and weak measurement on the steering of entropic uncertainty are analyzed. We find that the local PT-symmetric operation can reduce the entropic uncertainty, and the entropic uncertainty can also be decreased by weak measurement reversal.
Cauchy matrix structure of the Mel’nikov model of long–short wave interaction
Authors: Tian Hong-Juan , Zhang Da-Jun 
Published: November 2020

Abstract
We propose a systematic method to construct the Mel’nikov model of long–short wave interactions, which is a special case of the Kadomtsev–Petviashvili (KP) equation with self-consistent sources (KPSCS). We show details how the Cauchy matrix approach applies to Mel’nikov's model which is derived as a complex reduction of the KPSCS. As a new result we find that in the dispersion relation of a 1-soliton there is an arbitrary time-dependent function that has previously not reported in the literature about the Mel’nikov model. This function brings time variant velocity for the long wave and also governs the short-wave packet. The variety of interactions of waves resulting from the time-freedom in the dispersion relation is illustrated.
Dibaryons: Molecular versus compact hexaquarks *
Authors: Clement H. , Skorodko T. 
Published: November 2020

Abstract
Hexaquarks constitute a natural extension of complex quark systems, just as tetra- and pentaquarks do. To this end, the current status of

in both experiment and theory is reviewed. Recent high-precision measurements in the nucleon-nucleon channel and analyses thereof have established

as an indisputable resonance in the long-sought dibaryon channel. Important features of this

state are its narrow width and deep binding relative to the

threshold. Its decay branchings favor theoretical calculations predicting a compact hexaquark nature of this state. We review the current status of experimental and theoretical studies on

as well as new physics aspects it may bring in future. In addition, we review the situation at the

and

thresholds, where evidence for a number of resonances of presumably molecular nature has been found – similar to the situation in charmed and beauty sectors. Finally, we briefly discuss the situation of dibaryon searches in the flavored quark sectors.
The local and global properties of different types of supernova host galaxies
Authors: Zhou Li , Liang Yan-Chun , Ge Jun-Qiang , Zhu Yi-Nan , Shao Xu , Wu Hong , Shi Wei-Bin , Deng Li-Cai 
Published: November 2020

Abstract
By using Data Analysis Pipeline (DAP) products of Mapping Nearby Galaxies at Apache Point Observatory (MaNGA), which are publicly available from the SDSS Data Release 15, we analyze the local properties at the SN explosion sites and global properties of different types of SN host galaxies to explore the explosion environments of different types of SNe. In our sample, there are 67 SN host galaxies in the field of view of MaNGA, including 32 Type Ia, 29 core collapse SNe (CCSNe), 1 superluminous SN (SLSN), 1 Type I and 4 unclassified type of SNe, with which we can apply the K-S test for analysis and derive statistically robust results. Due to the limited sample size, we could not remove the mass dependence in this work, which is likely the true driver of the trends for the properties presented in this work. The global star formation rate (SFR) and EW(Hα) for SN Ia hosts are slightly lower than those for CCSN hosts on average. SN Ia host galaxies are ∼0.3 dex more massive than CCSN hosts, which implies that the number ratio of CCSNe to Type Ia SNe will decrease with increasing stellar mass of host galaxies. The stellar population age of SN Ia host galaxies is older than that of CCSN hosts on average. There is no significant difference between different types of SN hosts for some properties, including local SFR density (ΣSFR), and local and global gas-phase oxygen abundance. For most galaxies in our sample, the global gas-phase oxygen abundance estimated from the integrated spectra of SN hosts can represent the local gas-phase oxygen abundance at the SN explosion sites with small bias.
The correlations among variability, optical peak time and spectral time lag of long gamma-ray bursts
Authors: Liao Bin , Zou Yuan-Chuan , Wang Fei-Fei , Liu Yu , Lei Wei-Hua 
Published: November 2020

Abstract
Statistical relations are useful tools to comprehend the intrinsic physics processes of gamma-ray bursts (GRBs). In this work we collect spectral lag (τ), variability (V) and optical peak time (t
p,o). We find that there is a correlation between variabilities and spectral lags, reading as V = −0.0075 (±0.0007) × log10
τ + 0.0351 (±0.0024). There may also exist a relatively weak positive tendency between GRBs optical band peak times and their spectral time lags. Its Pearson coefficient is 0.398, which indicates a weak linear correlation. If we contain some “negative spectral lag” samples, then the latter relation would be worse due to two outlying points. The τ-V relation is consistent with previous studies, and the positive trend between τ and t
p,o indicates the spectral lag of GRB might be caused by the curvature effect, but this conclusion is not significant.
The first results of observations of lunar occultations in different spectral ranges at the 6-m telescope of the SAO RAS
Authors: Shmaylova Ekaterina , Dyachenko Vladimir , Richichi Andrea , Beskakotov Anatoly , Maksimov Aleksandr , Mitrofanova Arina , Balega Yuri 
Published: November 2020

Abstract
Observations by the method of lunar occultations at the 6-m telescope of the SAO RAS reach a resolution limit better than 1 mas. We have devised a new method of observation, which allows obtaining the curves of lunar occultations simultaneously in different ranges of the visible part of the spectrum, and conducted the first observations using a modified optical system. In January 2019, applying the new method, the magnitude differences of the components of the binary star HD 36524 in the R and I bands were measured, which were 1.5 and 1.3 mag, respectively, in good agreement with values calculated from the Gaia mission. According to the obtained data, it was determined that with this method it is possible to reach a signal-to-noise ratio of about 5–10 for stars of 10th magnitude. We discuss the applicability of the proposed optical scheme for the study of binary stars.
Focal surface attitude detection for LAMOST
Authors: Hu Tian-Zhu , Zhang Yong , Cui Xiang-Qun , Li Ye-Ping , Pan Xiu-Shan , Fu Ying 
Published: November 2020

Abstract
With telescope apertures becoming larger and larger, the deployment of large-field telescopes is becoming increasingly popular. However, optical path calibration is necessary to ensure the image quality of large-field and large-diameter telescopes. In particular, focal plane attitude calibration is an essential optical path calibration technique that has a direct impact on image quality. In this paper, a focal plane attitude detection method using eight acquisition cameras is proposed based on the calibration requirements of the wide-field telescope, LAMOST (Large Sky Area Multi-Object Fiber Spectroscopic Telescope). Comparison of simulation and experimental results shows that the detection accuracy of the proposed method can reach 30 arcsec. With additional testing and verification, this method could be used to facilitate regular focal plane attitude calibration for LAMOST as well as other large-field telescopes.
Has LIGO detected primordial black hole dark matter? - tidal disruption in binary black hole formation
Authors: Gao Yuan , Zhang Xiao-Jia , Su Meng 
Published: November 2020

Abstract
The frequent detection of binary mergers of ∼30 M
⊙ black holes (BHs) by the Laser Interferometer Gravitational-Wave Observatory (LIGO) rekindled researchers’ interest in primordial BHs (PBHs) being dark matter (DM). In this work, we investigated PBHs distributed as DM with a monochromatic mass of 30 M
⊙ and examined the encounter-capture scenario of binary formation, where the densest central region of DM halo dominates. Thus, we paid special attention to the tidal effect by the supermassive black hole (SMBH) present. In doing so, we discovered a necessary tool called loss zone that complements the usage of loss cone. We found that the tidal effect is not prominent in affecting binary formation, which also turned out to be insufficient in explaining the totality of LIGO’s event rate estimation, especially due to a microlensing event constraining the DM fraction in PBH at the mass of interest from near unity to an order smaller. Meanwhile, an early-universe binary formation scenario proves so prevailing that the LIGO signal in turn constrains the PBH fraction below one percent. Thus, people should put more faith in alternative PBH windows and other DM candidates.
Pressurization influence on power and ecological indication of the petrol engine
Authors: Danilov I , Teplinsky A , Khlopkov S , Khodyakov A , Danilov Yu , Popova I 
Published: November 2020

Abstract
Indicated on dynamometric stand LPS 2510 dependences of the engine power and a torque on the crankshaft frequency have been presented in the article. The car VAZ 2123 “Chevrolet Niva” (without catalytic converter) and the engine VAZ 21214 with the mechanical supercharger (compressor) PK-23 have been tested. It is established that configuration of the engine with the compressor has allowed not only to restore the lost power of the motor as a result of extended operation, but also to increase it. It is shown that the content of carbon monoxide and products of incomplete combustion of hydrocarbons in the exhaust gases does not exceed standard values of volume fractions of CO and CH. It is established that registered by the indicator of OKTAN values of gasoline are identical to those declared by the manufacturer.
Hydraulic parameters of culverts from pipes with normal and spiral form of corrugation
Authors: Suetina T A , Chernykh O N , Burlachenko A V , Koroteev D D 
Published: November 2020

Abstract
The research paper is devoted to study of culverts from metal corrugated pipes (CMP) and helically corrugated steel pipes (HCSP). Modern design solutions of culverts from CMP and HCSP are differ as compared with used before (bottom with various types of roughness, inlet and outlet heads, type and size of corrugation) and there is not enough experimental data for their design. The aim of the study is to test CMP and HCSP models to determine their hydraulic parameters, such as roughness and resistance coefficient, critical bias and so on. The laboratory equipment and method of experimental study as well as results of the tests of CMP and HCSP with protective tray at the pipe bottom and without it under different operation modes are given in the research paper. The results of the study show that roughness coefficient under pressure hade mode can be determined using Norton equation only for HCSP, Norton and Einstein-Banks equations are corrected for CMP.
Application of pump-ejecting system for SWAG injection and utilization of associated gas
Authors: Drozdov A N , Gorelkina E I , Gorbyleva Ya A , Narozhnyy I M 
Published: November 2020

Abstract
The work provides an analysis of the operating experience of the pump-ejecting system for simultaneous water and gas injection (SWAG) injection, at the Samodurovsky field of Orenburgneft PJSC. The results of earlier theoretical and experimental studies were confirmed. The pump-ejecting system worked stably in various modes; there were no disruptions in the supply of ejectors and pumps. At the same time, the experience of operating the system made it possible to outline measures to improve not only the equipment, but also the technology of water and gas impact on the formation using pump-ejecting systems. To implement SWAG, it is necessary that the gas content of the mixture in reservoir conditions reach 13-20%. In those cases when the volume of associated petroleum gas (APG) is not offered, it is proposed to use nitrogen. Adding nitrogen as a gas component to the water-gas mixture will help to obtain a mixture with the desired gas content. This solution allows utilizing APG and significantly increasing oil production.