bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enhanced thermoelectric efficiency of monolayer InP3 under strain: a first-principles study
Authors: Keshri Sonu Prasad , Medhi Amal 
Published: February 2021

Abstract
We study the thermoelectric properties of monolayer indium triphosphide (InP3) under uniaxial compressive and tensile strains using density functional theory in conjunction with Boltzmann transport formalism. InP3 is a recently predicted two-dimensional (2D) material with a host of interesting multi-functional properties. Though InP3 is a low lattice thermal conductivity material, its thermoelectric figure of merit, ZT is found to be low. We thoroughly examined how its thermoelectric transport properties evolve under external strain. We find that the tensile (t) and compressive (c) strains have contrasting effects on the transport coefficients, both leading to the same effect of enhancing the ZT value strongly. While t-strain enhances the power factor dramatically, c-strain gives rise to an ultra-low lattice thermal conductivity. Both these effects lead to an enhancement of ZT value at high temperatures by an order of magnitude compared to the corresponding value for free InP3. The maximum ZT value of InP3 at 800 K is found to be ∼0.4 under t-strain and ∼0.32 under c-strain, values which are comparable to those observed for some of the leading 2D thermoelectric materials. Another finding relevant to optoelectronic properties is that under c-strain the material shows a transition from an indirect to a direct band gap semiconductor with an accompanying increase in the valley degeneracy. The structural, electronic, and thermal properties of the material are thoroughly analyzed and discussed.
Graphene-carbon nitride interface-geometry effects on thermal rectification: a molecular dynamics simulation
Authors: Farzadian O , Spitas C , Kostas K V 
Published: February 2021

Abstract
In this paper we expand our previous study on phonon thermal rectification (TR) exhibited in a hybrid graphene-carbon nitride system (G−C3N) to investigate the system’s behavior under a wider range of temperature differences, between the two employed baths, and the effects of media-interface geometry on the rectification factor. Our simulation results reveal a sigmoid relation between TR and temperature difference, with a sample-size depending upper asymptote occurring at generally large temperature differences. The achieved TR values are significant and go up to around 120% for ΔT = 150 K. Furthermore, the consideration of varying media-interface geometries yields a non-negligible effect on TR and highlights areas for further investigation. Finally, calculations of Kapitza resistance at the G-C3N interface are performed for assisting us in the understanding of interface-geometry effects on TR.
Visualization of the grain structure in high-performance Ba1−x
K
x
Fe2As2 superconducting tapes
Authors: Huang He , Yao Chao , Dong Chiheng , Zhang Xianping , Wang Dongliang , Liu Shifa , Cheng Zhe , Zhu Yanchang , Ma Yanwei 
Published: February 2021

Abstract
122 type iron-based superconductors (IBSs) are potential for high-field applications, and the fabrication of high-performance IBS wires and tapes is essential. By using the powder-in-tube method, transport critical current density (J
c) of hot-pressed (HP) silver-sheathed Ba1−x
K
x
Fe2As2 (Ba-122) tapes have reached 1.5 × 105 A cm−2 at 4.2 K and 10 T. However, the J
c of flat-rolled (FR) tapes is 6.2 × 104 A cm−2 (4.2 K, 10 T), less than half of the former. The grain orientation, grain size, and grain shape are important parameters for the understanding of the superconducting properties of IBS tapes. Such grain structure data can be provided by the electron backscatter diffraction (EBSD) technique. In this work, we extensively adopted EBSD to visualize the microstructure of state-of-the-art HP and FR Ba-122 tapes. The grain orientation, grain connectivity, grain size, and grain shape aspect ratio of these two types of tapes are quantitatively analyzed. The c-axis texture is commonly found in both HP and FR tapes, but no in-plane texture is discovered. The texture and grain connectivity in HP tapes are better than that in FR tapes. The grain size of FR tapes is smaller than that of HP tapes, and the hot-pressing processes can promote the growth of grains along the ab plane. We recommend that strong texture will promote the growth of grains, while the small-sized grains will return to limit the formation of texture. Therefore, finding a balance point that plays a synergistic promote effect of grain orientation and grain size is a strategy to improve the transport properties of IBS tapes further. The present results demonstrate that there is still margined to enhance the properties of IBS tapes.
An accurate and robust metrological network for coherent optical frequency dissemination
Authors: Cantin Etienne , Tønnes Mads , Le Targat Rodolphe , Amy-Klein Anne , Lopez Olivier , Pottie Paul-Eric 
Published: February 2021

Abstract
We introduce multi-branch repeater laser stations (MLSs) for the dissemination of an ultra-stable signal from one point to multiple users and the simultaneous evaluation of the stability and accuracy of multiple links. We perform the study of the noise floor of this new instrument. We present then an optical fiber network of 4800 km built with three MLSs and 13 repeater laser stations (RLSs). We show the multi-user optical frequency dissemination on four links totalizing 2198 km with uncertainties below 1.1 × 10−19. The robustness of the network over two years is presented and stability and accuracy at 107 seconds integration time are finally showed.
The effect of hadronic scatterings on the measurement of vector meson spin alignments in heavy-ion collisions *
Authors: Shen Diyu , Chen Jinhui , Lin Zi-Wei 
Published: February 2021

Abstract
Spin alignments of vector mesons and hyperons in relativistic heavy-ion collisions have been proposed as signals of global polarization. The STAR experiment first observed the

polarization. Recently, the ALICE collaboration measured the transverse momentum (

) and the collision centrality dependence of

, and

spin alignments during Pb-Pb collisions at

= 2.76 TeV. A large signal is observed in the low

region of mid-central collisions for

, while the signal is much smaller for

, and these have not been understood yet. Since vector mesons have different lifetimes and their decay products have different scattering cross sections, they suffer from different hadronic effects. In this paper, we study the effect of hadronic interactions on the spin alignment of

,

, and

mesons in relativistic heavy-ion collisions with a multi-phase transport model. We find that hadronic scatterings lead to a deviation of the observed spin alignment matrix element

away from the true value for

and

mesons (with a bigger effect on

) while the effect is negligible for the

meson. The effect depends on the kinematic acceptance: the observed

value is lower than the true value when the pseudorapidity (

) coverage is small, while there is little effect when the

coverage is large. Hence, this study provides valuable information to understand the vector meson spin alignment signals observed during the experiments.
Geometric micro-shapes facilitate trackless connections between human astrocytes
Authors: Li Si , Graham E Scott , Unsworth Charles P 
Published: February 2021

Abstract

Objective. Cell patterning approaches commonly employed to direct the cytoplasmic outgrowth from cell bodies have been via chemical cues or biomaterial tracks. However, complex network designs using these approaches create problems where multiple tracks lead to manifold obstructions in design. A less common but alternative cell patterning modality is to geometrically design the nodes to project the cytoplasmic processes into a specific direction, thus, removing the need for tracks. Jang et al performed an in-depth study of how rodent neuron primaries could be directed accurately using geometric micro-shapes. In parallel and in contrast, to the work of Jang et al we investigate, for the first time, the effect that micro-shape geometry has on the cytoplasmic process outgrowth of human cells of astrocyte origin using the biomaterial parylene-C. Approach. We investigated eight different types of parylene-C micro-shape on SiO2 substrates consisting of the: circle, square, pentagon, hexagon, equilateral triangle and three isosceles triangles with top vertex angles of 14.2°, 28.8°, and 97.6°, respectively. We quantified how each micro-shape influenced the: cell patterning, the directionality of the cytoplasmic process outgrowth and the functionality for human astrocyte. Main results. Human astrocytes became equally well patterned on all different micro-shapes. Human astrocytes could discriminate the underlying micro-shape geometry and preferentially extended processes from the vertices of equilateral triangles and isosceles triangles where the vertex angle equal to 28.8° in a repeatable manner whilst remaining functional. Significance. We demonstrate how human astrocytes are extremely effective at directing their cytoplasmic process outgrowth from the vertices of geometric micro-shapes, in particular the top vertex of triangular shapes. The significance of this work is that it demonstrates that geometric micro-shapes offer an alternative patterning modality to direct cytoplasmic process outgrowth for human astrocytes, which can serve to simplify complex network design, thus, removing the need for tracks.
Optimized design of a tungsten–copper functionally graded material monoblock for minimal von Mises stress meeting the material operational temperature window
Authors: Van den Kerkhof S. , Blommaert M. , Coenen J.W. , Baelmans M. 
Published: February 2021

Abstract
Functionally graded materials (FGMs) are a means to remove discrete material interfaces which lead to high local stress concentrations, such as the tungsten–copper (W–Cu) interface of the current ITER monoblock design. This paper employs adjoint-based optimization methods to identify the highest potential reduction of stresses that could be reached with these materials, while ensuring that the local temperature does not exceed the material temperature operational window. The cheap sensitivity evaluation inherent to the adjoint approach enables the optimization of the detailed 3D material distribution. Furthermore, a novel optimization method based on an augmented Lagrangian formulation is proposed that allows accurate treatment of the material temperature window constraints. The temperature and stresses are modelled by the steady heat conduction and Navier’s equation, respectively. We compare the results of different optimization formulations, with cost functions based on the von Mises stress and corresponding yield criterion and considering different values of the stress free temperature. To assess the performance under off-design conditions, two optimized designs were chosen and compared to the ITER and flat tile (FT) design, which consists of a copper block protected by a tungsten layer on top. The optimized designs lead to a factor 2–4 decrease in maximal stress near the original W–Cu interface of the FT design and a factor 10 decrease in yield criterion measure near the cooling duct. Under off-design conditions, they realized a factor 2–10 decrease in yield criterion in the upper part of the monoblock. This confirms numerically that FGMs can lead to significant design improvements. Finally, the inclusion of the material temperature operation window constraints leads to a decrease of 30–55 vol% W compared to the unconstrained cases, thus profoundly influencing the final design. The stress free temperature was found to have a comparably weaker influence on the final design with differences of 5–30 vol% W.
Development of pre-conceptual ITER-type ICRF antenna design for DEMO
Authors: Bobkov V. , Usoltceva M. , Faugel H. , Kostic A. , Maggiora R. , Milanesio D. , Maquet V. , Ochoukov R. , Tierens W. , Zeus F. , Zhang W. 
Published: February 2021

Abstract
ICRF antenna development for DEMO for the pre-conceptual phase is carried out by merging the existing knowledge about multi-strap ITER, JET and ASDEX upgrade antennas. Many aspects are taken over and adapted to DEMO, including the mechanical design and RF performance optimization strategies. The minimization of ICRF-specific plasma-wall interactions is aimed at by optimizing the feeding power balance, a technique already proven in practice. Technological limits elaborated for the components of ITER ICRF system serve as a guideline in the current design process. Several distinctive aspects, like antenna mounting, integration with the neighboring components or adaptation for neutron environment, are tackled individually for DEMO.
QSPR Analysis and Resulting Capacity of Such Graph Theocratic Matrices Using Minimum Majority Parameter
Authors: Jenitha G. , Paulraj Jayasimman I. , Kumaravel A. 
Published: February 2021

Abstract
Mathematical Parameters are used in QSAR / QSPR analysis to estimate bioactivity of chemical compounds. Throughout this paper we are discussing the QSPR analysis of certain theocratic graph matrices and their corresponding energy. Our analysis reveals some important findings which help define the useful Mathematical Parameter based on their predictive energy.
Ways to Improve the Efficiency of Construction Engineering Management Based on BIM Technology
Authors: Chen Jin 
Published: February 2021

Abstract
At present, the country has higher and higher requirements for the transformation and upgrading of the construction industry. The traditional extensive construction methods can no longer meet the requirements of the transformation and upgrading of enterprises. Industrialization and greening have become the new direction of the development of the construction industry in the future. The purpose of this paper is to study the ways to improve the efficiency of construction engineering management based on BIM technology. This article uses three data exchange methods to test and evaluate the corresponding plug-ins. Data conversion tests were performed on structural analysis models established by more than 60 different software. According to the results of quantitative analysis and comparison, specific suggestions on how to select reasonable data exchange methods in specific situations such as the use of different later models were given. This paper uses BIM technology to achieve 4D construction simulation verification, assists in project schedule management, improves management efficiency, uses BIM technology to assist in optimizing the design of the project construction organization plan, and formulates the optimal construction organization plan. Improve the quality management of engineering design data and realize BIM-based three-dimensional proofreading. And through the analysis of the above-mentioned problems of the M project, and put forward feasible management optimization suggestions, and finally achieve the purpose of helping the construction enterprise to improve the management efficiency and level. At the same time, it can also provide assistance and reference for other similar companies in the same industry. Research has shown that it is not conducive to use this method when the possibility of interface component omission and information deviation in the secondary development of API is 50%, 40%, and 30% respectively, and it performs well in importing structural information parameters. This method is preferred.
Application of Server Virtualization Technology in Power Information Construction
Authors: Yu Hai , Guo Jing , Wu Lei , Wu Shun , Peng Bo 
Published: February 2021

Abstract
In recent years, with the development of our country, higher requirements are put forward for the power supply. Electric power enterprises want to improve their comprehensive strength, but also in order to adapt to the development of the times, it is necessary to carry out information construction. However, the traditional physical server has many shortcomings and shortcomings in the enterprise information construction. Therefore, this paper puts forward the application research of server virtualization technology in power information construction. This paper compares and analyzes the resources needed by physical server and virtual server, and points out that virtual server have obvious advantages of high information security, low energy consumption, high utilization rate and low maintenance cost. In order to make the virtual server successfully applied in the information construction of electric power enterprises, this paper puts forward the operation guidance standard of server virtualization implementation process, and emphasizes that the integration of server resources should be done well in the process of information construction. In order to ensure the security of server virtualization process, this paper lists the detailed security measures of server virtualization. According to the operation of the above steps, the power enterprise can complete the information construction work better through the virtualization of the server. It is considered that the use of virtual server in enterprise information construction is a big trend, which conforms to the development of the times and improves the utilization rate of resources.
RETRACTED: Study on Hypoglycemic Effect of Mulberry Leaf Extract Based on Big Data analysis
Authors: Yang CongFa , Deng Xiang , Tang Ben , Wang XiaoYan 
Published: February 2021

Abstract
With the improvement of people’s living standards and the emergence of aging society, the incidence of diabetes is increasing year by year, and diabetes and its complications have become the third killer threatening human health. There are many drugs for treating diabetes, but their toxic and side effects are all great. Therefore, using big data analysis to find and develop natural products with hypoglycemic effect has high practical value. Therefore, the purpose of this paper is to study the hypoglycemic effect of mulberry leaf extract based on big data analysis. Firstly, this paper studies the medicinal value of mulberry leaves and related application methods by consulting relevant data. Through big data analysis, it is found that mulberry leaves are rich in alkaloid component 1-deoxynojirimycin (DNJ), accounting for more than 50% of alkaloid content. Therefore, this paper takes mulberry leaf extract DNJ as the research object, and firstly prepares mulberry leaf extract. Mulberry leaf water extract was perfused into stomach for 15 consecutive days, and fasting blood glucose of diabetic mice was measured 2 hours after eating by glucose oxidase method at specified time. The hypoglycemic effect of mulberry leaf water extract was analyzed by big data. The results showed that mulberry leaf extract could effectively inhibit the enzyme activity of decomposing sugar and prevent glucose absorption. Therefore, it can significantly reduce the blood sugar level of diabetic mice by about 50%. And the higher the dose of mulberry leaf extract, the better the hypoglycemic effect, showing a dose effect.
Application of Ubiquitous Power Internet of Things and IPv6 Technology in Wireless Access Terminal and Intelligent Meter Reading Application
Authors: Wang Yawen , Guo Feng , Yao Weiqing , Deng Guoru , Liao Rongtao , Hu Shuai , Jin Bo , Meng Haohua , Xiao Dongling 
Published: February 2021

Abstract
Power is the basis of the development of enterprises and even the country. In recent years, the demand for power in China is increasing. Wireless access terminals and intelligent meter reading have been widely used in the field of electric power. But at the same time, there are still many deficiencies in China’s power grid. Therefore, this paper puts forward the research of ubiquitous power Internet of things and IPv6 Technology in wireless access terminal and intelligent meter reading application. In this paper, the current types of distribution network are investigated, and the shortcomings of the current power grid are analyzed. In view of the existing power grid operation in China, this paper deeply studies the prospect of ubiquitous power Internet of things and IPv6 Technology in wireless access terminal and intelligent meter reading application, as well as the unique advantages of ubiquitous power Internet of things and IPv6 Technology in power grid. Through the relevant investigation, it can be seen that the service level, operation level, ecological environment construction and data sharing of the enterprise have been greatly improved after using ubiquitous power Internet of things and IPv6 technology. In addition, the power network structure has the advantages of simplifying network, reducing parameter setting, reducing communication flow and enhancing real-time data transmission. At the end of the study, this paper analyzes the key technology of ubiquitous power Internet of things in wireless access terminal and intelligent meter reading application, and puts forward a new research direction for the full application of the technology.
A Decomposition Control of Variable Speed Control Torque Gyro
Authors: Wu Yue , Guan Rongqiang , Shao Fang , Yan Jingjing 
Published: February 2021

Abstract
IPACS (energy / attitude control integrated control system) is the main problem studied in recent years. In view of this problem, on the basis of the existing flywheel control law torque analysis, the singular value decomposition of torque output in CMGs mode is carried out. Only when the CMGs mode is close to singular, the instruction torque in the singular direction will be allocated to RWs so as to give full play to the VSCMGs execution ability under the premise of ensuring the output accuracy of the VSCMGs. In order to realize the control better, the zero motion control law and robust pseudo-inverse operation rate are analyzed.
RETRACTED: Construction of College English Teaching Resource Database under the Background of Big Data
Authors: Tan Qingyan , Shao Xiurong 
Published: February 2021

Abstract
At present, the construction of college English network resource database in domestic universities is still in its initial stage in practice, and it is almost a blank in theoretical research. The construction of college English teaching resource database is of great strategic significance for promoting the construction of college English subject resources and improving the talent training mode. In this regard, the purpose of this paper is to study the construction of college English teaching resource database under the background of big data. This paper first discusses the current situation of college English teaching resources construction and resources in China. This paper summarizes the main problems existing in contemporary Chinese college English teaching resources database. According to the previous investigation and research results, and combining with big data technology, this paper constructs a new college English teaching resource library. The new college English teaching resource library puts the feelings of college students at the main position, and its teaching resources are more inclined to the subjective initiative and communication of college students. The resource library also uses the storage architecture of data warehouse, combined with big data and other related technologies, to realize the storage and update of various English teaching resources, and meet the needs of effective management of teaching resources in colleges and universities. Finally, this paper compares the old and new college English teaching resources. The experimental results show that the college English teaching resource database constructed in this paper is more recognized and liked by students, and the degree of students’ liking for English has increased by about 55%, which plays a significant role in improving students’ English and provides an important reference for the construction of college English teaching resource database.