bluuebunny/crossref_metadata_2025_split huggingface dataset:
Carbon star CGCS 673 identified as a semi-regular variable star
Authors: Brincat Stephen M. , Galdies Charles , Hills Kevin 
Published: November 2020

Abstract
This study reports that the carbon star CGCS 673 is a semi-regular (SR) variable star with a period of 135 d and an amplitude of 0.18 mag in the V-band. The light curve obtained by this study correlates well with the SR classification as the photometric data obtained show noticeable periodicity in the light changes of CGCS 673 that is occasionally interrupted by a period of irregular variability. The derived period and colour index obtained from our data and those from professional databases indicate that the attributes of this star fall within the parameters of the SR class of variable stars. Following our notification of the discovery that this star is a variable source, CGCS 673 has received the AAVSO Unique Identifier of (AAVSO UID) 000-BMZ-492.
The first photometric investigation of the contact binary OQ Cam
Authors: Guo Ya-Ni , Li Kai , Xia Qi-Qi , Gao Xing , Jiang Lin-Qiao , Liu Yuan 
Published: November 2020

Abstract
The first charge-coupled device photometric light curves in B, V, Rc
, and Ic
bands of the short-period contact binary star OQ Cam are presented. Through analyzing the light curves with the Wilson-Devinney code, it is found that OQ Cam is a W-type shallow contact binary star with a contact degree of f = 20.2%. Based on the O – C analyzing, the orbit period displays a long term increasing with a rate of dP/dt = 4.40 × 10−7 d yr−1. The increasing in orbit period can be interpreted by mass transfer from the less massive component to the more massive one. As the orbit period increases, OQ Cam would evolve from the present shallow contact configuration to a non-contact stage. So it may be a potential candidate to confirm the thermal relaxation oscillation theory.
Imaging atmospheric turbulence, using entropy to quantify turbulence strength
Authors: Feng Lu , Shen Zhi-Xia , Hu Jing-Yao 
Published: November 2020

Abstract
Vertical profile of turbulence strength (

C
n
2

) is one of the most important attributes for evaluating a site’s astronomical performances. Although seeing is commonly used for describing turbulence strength, it can only represent the integral of all layers of the turbulence above the observer. Other techniques which can be applied to produce

C
n
2

, such as DIMM-MASS, SCIDAR, etc., all rely on rather complex systems to do the measurements. In this paper, we present an idea to evaluate the relative strength of turbulence with entropies of short exposure images taken at different conjugated heights of the turbulence. Initial experimental results are also presented in the paper.
On the correctness of orbital solutions obtained from a small set of points. Orbit of HIP 53731
Authors: Mitrofanova Arina , Dyachenko Vladimir , Beskakotov Anatoly , Balega Yury , Maksimov Alexander , Rastegaev Denis , Komarinsky Sergey 
Published: November 2020

Abstract
HIP 53731 is a binary consisting of stars of the spectral types K0 and K9. The orbit of this object was constructed previously by Cvetković et al. and improved by Tokovinin. It should be noted that there is a 180° ambiguity in the position angles of some published measurements. Speckle interferometric observations were obtained in 2007–2020 (21 measurements) at the 6-m telescope of the SAO RAS (BTA) by the authors of this article. The analysis of new data together with previously published ones made it possible to construct an accurate orbit of HIP 53731 and to halve the already known values of the orbital period of the system. As a result of the study, the mass sum, the masses of each component and their spectral types were determined by two independent methods. According to the qualitative classification of orbits, the orbital solution has grade 2 – “good” (observations cover more than half of the orbital period and correspond to different phases).
Luminosity of a radio pulsar and its new emission death line
Authors: Wu Qing-Dong , Zhi Qi-Jun , Zhang Cheng-Min , Wang De-Hua , Ye Chang-Qing 
Published: November 2020

Abstract
We investigated the pulsar radio luminosity (L), emission efficiency (ratio of radio luminosity to its spin-down power

E
˙

), and death line in the magnetic field (B) versus spin period (P) diagram. We found that the dependence of pulsar radio luminosity on its spin-down power (

L
−

E
˙

) is very weak, shown as

L
∼

E
˙

0.06

, which deduces an equivalent inverse correlation between emission efficiency and spin-down power as

ξ
∼

E
˙

−
0.94

. Furthermore, we examined the distributions of radio luminosity of millisecond and normal pulsars and found that for the similar spin-down powers, the radio luminosity of millisecond pulsars is about one order of magnitude lower than that of the normal pulsars. The analysis of pulsar radio flux suggests that these correlations are not due to a selective effect but are intrinsic to the pulsar radio emission physics. Their radio radiations may be dominated by the different radiation mechanisms. The cut-off phenomenon of currently observed radio pulsars in B – P diagram is usually referred as the “pulsar death line”, which corresponds to

E
˙

≈

10

30

erg s−1 and is obtained by the cut-off voltage of electron acceleration gap in the polar cap model of pulsar proposed by Ruderman and Sutherland. Observationally, this death line can be inferred by the actual observed pulsar flux S ≥ 1mJy and 1 kpc distance, together with the maximum radio emission efficiency of 1%. However, the observation data show that the 37 pulsars pass over the death line, including the recently observed two pulsars with long periods of 23.5 s and 12.1 s, which violate the prediction of the polar cap model. At present, the actual observed pulsar flux can reach 0.01mJy by FAST telescope. This will arise the observational limit of spin-down power of pulsars as low as

E
˙

≈

10

28

erg s−1. This means that the new death line is downward shifted two orders of magnitude, which might be favorably referred as the “observational limit–line”. Accordingly, the pulsar theoretical model for the cut-off voltage of gap should be heavily modified.
A thick-disk galaxy model and simulations of equal-mass galaxy pair collisions
Authors: Arreaga-García Guillermo 
Published: November 2020

Abstract
We implement a numerical model reported in the literature to simulate the evolution of a galaxy composed of four matter components, such as: a dark-matter halo; a rotating disk of stars; a spherical bulge of stars and a ring of molecular gas. We show that the evolution of this galaxy model is stable at least for 10 Gyr (Gyr = 109 years). We characterize the resulting configuration of this galaxy model by figures of the circular velocity and angular momentum distribution; the tangential and radial components of the velocity; the peak density evolution and the radial density profile. Additionally, we calculate several models of equal-mass galaxy binary collisions, such as: (i) frontal and (ii) oblique (with an impact parameter), (iii) two models with initial conditions taken from a 2-body orbit and (iv) a very close passage. To allow comparison with the galaxy model, we characterize the dynamics of the collision models in an analogous way. Finally, we determine the de Vaucouleurs fitting curves of the radial density profile, on a radial scale of 0–100 kpc, for all the collision models irrespective of the pre-collision trajectory. To study the radial mass density and radial surface density profiles at a smaller radial scale, 0–20 kpc, we use a four-parameter fitting curve.
Towards human motor augmentation by voluntary decoupling beta activity in the neural drive to muscle and force production
Authors: Bräcklein M , Ibáñez J , Barsakcioglu D Y , Farina D 
Published: November 2020

Abstract

Objective. Effective human motor augmentation should rely on biological signals that can be volitionally modulated without compromising natural motor control. Approach. We provided human subjects with real-time information on the power of two separate spectral bands of the spiking activity of motor neurons innervating the tibialis anterior muscle: the low-frequency band (<7 Hz), which is directly translated into natural force control, and the beta band (13–30 Hz), which is outside the dynamics of the neuromuscular system. Main Results. Subjects could gain control over the powers in these two bands to navigate a cursor towards specific targets in a 2D space (experiment 1) and to up- and down-modulate beta activity while keeping steady force contractions (experiment 2). Significance. Results indicate that beta projections to the spinal motor neuron pool can be voluntarily controlled partially decoupled from natural muscle contractions and, therefore, they could be valid control signals for implementing effective human motor augmentation platforms.
Configuration characteristics of the Chinese First Quasi-axisymmetric Stellarator
Authors: Liu Haifeng , Shimizu Akihiro , Xu Yuhong , Okamura Shoichi , Kinoshita Shigeyoshi , Isobe Mitsutaka , Li Yangbo , Xiong Guozheng , Wang Xianqu , Huang Jie , Cheng Jun , Liu Hai , Zhang Xin , Yin Dapeng , Wang Y , Murase Takanori , Nakagawa Sho , Tang Changjian 
Published: November 2020

Abstract
The Chinese First Quasi-axisymmetric Stellarator (CFQS) will be the first operational quasi-axially symmetric stellarator in the world. The physical and engineering complexities led to the cancellation of two famous quasi-axisymmetric stellarators, CHS-qa and NCSX. Therefore, the major mission of the CFQS is to experimentally achieve the canonical quasi-axisymmetric configuration. The CFQS has been designed to possess a number of advanced features in fixed and free-boundary equilibria. It is a compact stellarator with an aspect ratio R/a ∼4.0. The neoclassical diffusion coefficient is similar to that of tokamaks in the collisionless regime. The MHD equilibrium of the CFQS configuration is stable up to volume-averaged normalized pressure β ∼1.1%. A region of the second ballooning stability exists in this facility with a large region of plasma, becoming second stable for β ∼2.7% in free-boundary equilibria. The gap between the first and second stability boundaries is very narrow, which is greatly beneficial for the CFQS operation in the second stable regime with high β plasma. A modular coil system with 16 coils is designed which robustly reproduces the standard quasi-axisymmetric magnetic field.
Evaluation and Influence Factor Analysis on Industrial Competitiveness of Manufacturing Industry of Pearl River Delta
Authors: Guan Huaping , Li Zhuolan , Hu Langduo 
Published: November 2020

Abstract
This paper divides the manufacturing industry into four types, analyzes the development of four types of manufacturing industry in the Pearl River Delta(PRD), uses labor productivity as the evaluation index of industrial competitiveness, establishes panel data model to analyze the influencing factors of manufacturing industry competitiveness in the Pearl River Delta, draws research conclusions and puts forward suggestions. The results show that the capital intensive and technology intensive industries in the manufacturing industry of the Pearl River Delta have strong competitiveness, the competitive disadvantage of labor-intensive industries is gradually revealed, and the competitiveness of high-tech industries is gradually enhanced; the per capita equipment rate, average industrial scale, turnover rate of current assets and industrial added value rate all have a positive impact on the competitiveness of the manufacturing industry of the Pearl River Delta.
Organic Regulation and Remediation of Pollution of Chaolin Soil in Shandong
Authors: Qu Bairu , Wang Yang , Wang Guangkai , Liu Bo , Lei Yaodong , Song Hailong 
Published: November 2020

Abstract
In recent years, due to the frequent occurrence of excessive heavy metal content in the cinnamon soil in the Shandong region of China, the country and people have attached great importance to the pollution of heavy metal in the cinnamon soil. Heavy metal pollution has a wide range and long duration. Once it enters the human body, it will cause serious harm to human health. Therefore, the prevention and control of heavy metal pollution in Chaoshan soil in Shandong will be one of the focuses of current and future development in the field of environmental protection. In this paper, by sampling and analyzing the pollution of Chaozhou brown soil in Shandong area, the content range of heavy metals, accumulation and pollution of heavy metals in Chaozhou brown soil in this area were evaluated. Five organic regulators calcium-based mineral A and calcium On the effects of mineral B, biomass charcoal D, peat H and limestone E on the leaching toxicity of Cd in Chao cinnamon soil, three different types of organic regulators A, D and E were investigated in single and mixed application of Under the influence of the effective state of Cd, the compound organic regulator ADE with the best repair effect and its proportion were selected. The experimental results show that the organic mixed modifier shows a good reduction effect on the Cd effective state content in the heavy metal composite polluted tidal cinnamon soil, in which the mixed organic modifier 0.5% peat + 0.25% vermiculite + 0.25% bone meal Stone: Bone meal is 2: 1: 1) The best reduction effect.
Research Progress on High Temperature Corrosion Mechanism of Waste Incineration Power Generation Boiler
Authors: Qu Zuopeng , Zhong Rigang , Wang Lei , Zhao Wenbo , Tian Xinli , Wang Haijun 
Published: November 2020

Abstract
Waste incineration power generation is a main method of waste disposal, and high temperature corrosion has always been a key issue restricting the development of this technology. This paper reviews the research progress of high temperature corrosion mechanism of waste incineration boilers. Based on the chemical reaction of high temperature corrosion of chloride, the mechanism of chloride corrosion of boiler metal fittings is discussed. The analysis results show that the high-temperature flue gas corrosion mainly includes HCl gas corrosion, molten salt corrosion and sulfide corrosion. In addition, the analysis of the high-temperature soot corrosion mechanism shows that the corrosion behavior of the heated surface in the presence of sintered ash is stress cracking corrosion. This is the result of the combined effect of the stress destruction of dense sintered ash and the ion diffusion corrosion reaction of chlorine in the ash.
Landscape Design of Rural Rainwater Utilization Based on LID Concept
Authors: Gui Yu , Zhang Ruixuan 
Published: November 2020

Abstract
This article takes farmland, roads, and rural residential areas as the starting point for effective rainwater planning and utilization. It is useful to purifies and reuses rural water sources, and promotes the improvement of rural ecosystems. Rural rainwater resources are lost and pollution is serious. The design of Low Impact Developmentrainwater use in rural landscape has become the focus of this article. This article mainly combines the rural terrain and environment, optimizes rainwater ecology, combines the use of storage gutters to form an ecological water cycle, builds rooftop gardens in rural residential areas, transforms landscape ecological vegetable gardens, and transforms permeable courtyards, and conducts landscape design. Through the ingenious combination of technology and art, landscape design such as rural rainwater collection, runoff mitigation, purification and infiltration, and agricultural applications is realized to meet the needs of household water and green irrigation, while improving the environmental quality of rural landscapes. By adopting the Low Impact Development rainwater landscape design, it highlights the sustainable development of rural landscape ecology.
Spectral Detection of Wood Moisture Content at 1899.703 Nm
Authors: Han Yushan , Fang Jian 
Published: November 2020

Abstract
In order to realize real-time, rapid and continuous measurement of wood moisture content, this paper studies the real-time measurement of wood moisture content based on near-infrared spectroscopy. In the experiment, a distributed feedback (DFB) laser with a central wavelength of 1899.703 nm was used as the light source, and poplar moisture content was chosen as the measured parameter to build the software and hardware system of the near infrared moisture detector. Because wood is a strong scattering medium, the modified Langbo-Beer law is adopted. The experimental measurement and data fitting of the moisture content of poplar wood showed that the true value of the moisture content of wood and the output power value of the laser measurement of the moisture content of wood could be fitted as a linear relationship within a certain range, and the correlation coefficient was above 0.90. The change trend of the measured value of the moisture content of wood was consistent with the true value, and the absolute error of the two was less than 0.15%. The experimental results show that the wood moisture content can be measured by near infrared technology.
Analysis of Pollution Sources of Heavy Metal in Farmland Soils Based on Positive Matrix Factorization Model
Authors: Yuan Sheng , Zhang Sheng , Sun Yingcheng , Guo Miao 
Published: November 2020

Abstract
In this research, a total of 103 samples of surface farmland soil in Jiangjin district are collected by 1000m × 1000m grid method, and the content distribution characteristics of such heavy metals as Cd, Hg, Zn, Pb, Cu, as, Ni, Cr in the soil are analyzed. Positive Matrix Factorization (PMF) model is adopted to analyze the pollution sources and contribution rates of these eight heavy metals in the study. The results show that the contribution rate of atmospheric deposition source is 19.7%, that of industrial source is 27.0%, that of natural parent material source is 35.5% and that of agricultural source is 17.8%. It can be seen from the analytical results of PMF model that human factors (64.5%) such as industrial and agricultural production is the main pollution source of heavy metal in farmland soil.
Exploration on the Architectural Design of Gymnasium Based on Compound Function---Taking Handball Hall Design of Huyi Campus of Xi’an Institute of Physical Education as an Example
Authors: Yao Yicong , Li Yueyan , Zhai Binqing 
Published: November 2020

Abstract
Under the trend of complex building functions, the paper tries to explore the idea and method of design for gymnasium. Taking the handball hall design of Huyi Campus of Xi’an Institute of Physical Education as an example, the paper puts forward specific design strategies in terms of function allocation, operation mode and image positioning. The purpose is to reveal the inspiration of the design concept of “compound function” for the design and development of gymnasium building.
Municipal Solid Waste Treatment System——Taking Wuhan as an Example
Authors: Lin Ruiting , Yi Wenlin , Xiao Lina 
Published: November 2020

Abstract
The work presented in this paper focuses on the problem of municipal solid waste in Wuhan which is becoming increasingly serious with the continuous progress of urbanization. Through literature research, we sort out and analyze the paradigms of waste treatment system of typical cities at home and abroad. By questionnaire survey, this paper makes a comprehensive analysis of current situation of municipal solid waste management in Wuhan and draws the conclusion that the waste management system is outdated and aging due to the imperfect legal system, the weak garbage sorting consciousness of residents and so on. Based on the background of Internet of things and big data, this paper puts forward some suggestions on the construction of municipal solid waste management for Wuhan.
Discussion on Construction Technology and Quality Management of Underwater Cast-in-Place Concrete Pile
Authors: Yin Jian , Yang Jing , Bai Minglong , Lv Tao , Suo Yiru 
Published: November 2020

Abstract
In the process of construction of underwater concrete pouring pile, it can not only improve the bearing capacity of concrete, but also improve the stability of concrete as a whole. Therefore, in order to ensure the orderly construction technology of construction of underwater concrete pouring pile, relevant construction personnel should improve their professional knowledge, and carry out relevant work mainly by improving the quality of construction of underwater concrete pouring pile technology. Construction personnel should strictly follow the requirements and process of construction of underwater concrete pouring pile technology to ensure the orderly progress of actual work, so as to make the construction of underwater concrete pouring pile technology can play its due value and effect in practice.
Rainfall Data Reconstruction Based on Chaotic Characteristics of Meteorological Factors
Authors: Li Junchen , Kong Ke , Cui Chenfeng , Zhang Zhitao 
Published: November 2020

Abstract
Rainfall data is a basic hydrological data, which is indispensable for the calculation of many hydrometeorological conditions. However, the acquisition of long-sequence rainfall data often has the problem of missing data. Based on the chaotic characteristics of rainfall and temperature data changes, the paper introduces temperature data with strong correlation with rainfall data into the model based on similar phase space theory for reconstruction of rainfall data. Through experiments in the Loess Plateau, the results show that the similarity between the calculated results and the real data reaches 95.17%. Compared with the traditional method, the accuracy of data reconstruction is improved.
Investigation and Analysis of Vascular Plant Flora in Xuzhou Area
Authors: Li Peigen , Zhao Haishan , Ju Shuming , Zhang Yuting , Zhu Zhiyi , Chen Jiayi , Yang Chengfang 
Published: November 2020

Abstract
Xuzhou is located in the northwest of Jiangsu Province, at the junction of the four provinces of Sulu, Henan and Anhui. It belongs to a warm temperate and semi-humid climate. Based on the field investigation in Xuzhou area, a total of 1037 species, 595 genera and 144 families of vascular plants were obtained. The flora has certain importance and particularity in Jiangsu area. Based on the analysis of the species diversity of vascular plants and their floristic characteristics and geographical components, it is found that there are a lot of vascular plants in Xuzhou, most of which are distributed in the world and north temperate zone, and the tropical distribution also accounts for a certain proportion, which shows that the flora is mainly the type of transition from tropical to temperate, At the same time, its flora also has some ancient elements.
Multi-Objective Optimal Management of Building Engineering Based On Ant Colony Algorithm
Authors: Xiao Lili , Zhang Ziru , Cai Shasha 
Published: November 2020

Abstract
Under the advanced theory, the traditional construction management mode is optimized. This paper mainly analyzes the multi-objective optimal management of building engineering based on ant colony algorithm. Based on the three indexes of building safety, quality and cost, the optimized management effect is analyzed.