bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on adsorption, rheology and hydration behaviours of Polycarboxylate(PCE) superplasticizer synthesized by different acid to ether ratio
Authors: Lin Zhijun , Zhang Xiaofang , Chen Zhanhua , Xiao Yue , Fang Yunhui 
Published: December 2021

Abstract
Polycarboxylate superplasticizer is synthesised by different acid to ether ratio, which is changing the main chain structure parameters, obtained different microstructures. The effect of different microstructure PCE superplasticizer on the fluidity of cement paste, rheological thixotropy, adsorption capacity and hydration heat are studied. The results show that dispersing performance in cement with acid to ether ratio of 3.5 is the best, the molecular weight and side chain density have rather little effect on the cement hydration process.
Weaving and mechanical properties test of polylactic acid/ramie composite fabric
Authors: Yang Wang 
Published: December 2021

Abstract
In view of the weak mechanical properties of polylactic acid fiber, the excellent mechanical properties of ramie fiber are selected to enhance the performance of polylactic acid fiber, thereby forming a composite fabric, and weaving plain weave fabric, twill weave fabric, satin weave fabric and square plain fabric by weaving method., Twill change fabric and satin change fabric six kinds of fabrics. Electronic thickness meter, electronic strength meter, and electronic bursting tester were used to test the thickness, tensile fracture and burst performance of 6 kinds of fabrics, and the reasons for the differences between the fabrics were discussed. The research results show that the mechanical properties of composite fabrics are better than those of pure polylactic acid fabrics. In addition, in terms of tensile fracture performance, the satin weave fabric is the strongest, and the satin weave is the strongest in burst performance. In terms of fabric thickness, the lowest thickness value is plain weave, but the thickness value, tensile breaking and bursting properties of square flat fabrics are ranked second, so the overall performance is always the strongest.
Resarch of Monte-Carlo Simulation in Grain Growth
Authors: Wang Zijie 
Published: December 2021

Abstract
This paper is produced after writing code for doing Monte Carlo simulations of a single type and use the model to study the self-assembly of co-polymers confined to a surface. A great interest has been aroused in the field of Monte Carlo simulation in material science since then. The Monte Carlo algorithm for single-phase normal grain growth is realized which can simulate and observe the current development of the microstructure of large grains in three dimensions. And this study will go through both two- and three-dimension Monte Carlo simulation in grain growth with a brief introduction of the methodology about this. At last, an enormous potential of the Monte Carlo simulation could be spotted in material field and the future material analysis will rely more on computational science due to the powerful computing power.
Microstructure characterization of reactor pressure vessel steel A508-3 irradiated by heavy ion
Authors: Ma Xianfeng , She Meng , Zhang Wenqing , Song Ligang , Qiu Shui , Liu Xiao , Zhang Ruiqian 
Published: December 2021

Abstract
As one of the key structures used in nuclear power plants, the study of irradiation effects of pressure vessel steel (RPV) is of great scientific value to nuclear safety. The RPV steel was irradiated by Fe ions up to three different irradiation damage levels (0.08 dpa, 0.15 dpa, and 0.6 dpa). The transmission electron microscope was utilized to measure the irradiated microstructure and it was found that after the irradiation of 0.08 dpa, the density and size of dislocation loops in Fe ions irradiated samples was small and the dislocation loops were distributed near the surface. When irradiation dose was up to 0.15 dpa, many black dots were distributed in the whole irradiation region and some large size dislocation loops appeared. In the case of 0.6 dpa, a large number of dislocation loops were produced and the distribution of dislocation loops extended to the whole irradiation region owing to the production and growth of defects such as vacancies and black dots.
Straightness Detection Method and Accuracy Analysis of Guide Rail Parts
Authors: Wang Xiaoying 
Published: December 2021

Abstract
Guide rail is widely used in various machine tools. It mainly plays the role of guidance and support. The geometric accuracy of the guide rail, especially the straightness accuracy, directly affects the stability of the machine tool and the accuracy of the workpiece. By analyzing the common detection methods, application scope and detection accuracy of straightness of guide rail parts, the application occasions and detection accuracy of each detection method are clarified. It provides a theoretical basis and guidance for testers to detect straightness and deal with errors.
Application Status and Research Progress of Resin Matrix Composites in Unmanned Underwater Vehicle
Authors: Wei Xiaoran , Xing Suli , Wei Dingjiang 
Published: December 2021

Abstract
Unmanned underwater vehicle (UUV) is a kind of underwater unmanned vehicle. In recent years, it has been widely used in civil and military fields. With the development of the unmanned underwater vehicle to multi-function, strong concealment, high performance and other directions, different kinds of resin matrix composite materials with excellent sound absorption, corrosion resistance, high specific strength characteristics, the utilization rate of unmanned underwater vehicle gradually increased and has broad development potential. In this paper, the application status and key technologies of resin-matrix composites in the field of unmanned aerial vehicle (UUV) are studied from two aspects of function and structure, and the technical trend of resin-matrix composites in the future UUV is described, and its development prospect is forecasted.
Research and Application of Neutron Detection Technology in Inspection of Void Defects in Turbine Runner Chamber
Authors: Xi Guangqing , Geng Qinghua 
Published: December 2021

Abstract
After a long-term operation of the turbine runner chamber, there may be voids between the steel lining and the concrete. If it is not discovered and treated in time, the safe and stable operation of the unit will be affected. In engineering practice, the hammering method is often used to detect hole defects, and the accuracy is low. The neutron detection technology is proposed to detect the void defects of the steel lining, quantitatively display the void location and size, and improve the accuracy of void defect detection.
Analysis and Research on the Cause of Wind Turbine Blade Bolt Fracture
Authors: Yun Feng , Liu Jun , Liu Chunyu , Zhao Xiaochun 
Published: December 2021

Abstract
In 2019, inspection personnel of a wind farm went to the tower and found that a total of 6 bolts of blades in the hub of a wind turbine had broken and failed. In order to find out the cause of fracture, the fracture bolt was comprehensively detected and analyzed by means of appearance morphology analysis, chemical composition analysis, mechanical properties testing, microstructure testing and fracture micro-area analysis. The results show that the main reasons for the bolt fracture are as follows: under the action of the bolt’s constantly changing and repeated wind load impact and the alternating load caused by blade rotation during the operation of the fan, the crack source is formed along the bottom of the thread with serious stress concentration and expands in fatigue mode until the whole fracture fails.
Research on Availability Function Deployment for Motorized Spindle based on User Requirement
Authors: Chen Bingkun , Wang Zhiqiong , Shen Guixiang 
Published: December 2021

Abstract
Users are the basis for the survival and development of enterprises. Only by understanding user requirement can products have sufficient competitiveness. In this paper, the machining center motorized spindle is taken as the research object. Based on the user requirement, this paper takes the motorized spindle as the research object, and combines the failure performance characteristics to expand the availability function. This method can transform the requirement information into the availability improvement strategy of the motorized spindle weak links, which is an effective method to quickly improve the availability level of the machining center motorized spindle.
Numerical analysis of meshing heating of involute spur gear
Authors: Mu Jie , Zhai Yusheng , Wang Chengzhi , Yun Ruiguang , En Jianfeng , Jia Siran , Yang Guicheng , Quan Baochao , Gao Zhenbang 
Published: December 2021

Abstract
Involute spur gears generate heat due to tooth surface meshing friction. Excessive temperature rising affects transmission accuracy and reduces work reliability.. By establishing the normalized coordinates of the meshing curve and based on the frictional heat generation theory, the mathematical analysis model of the meshing surface heating is studied, the factors affecting the average heat flux density of meshing are explored, and the distribution law of these factors along the normalized coordinate of the meshing is analysed. The analysis shows that the tangential velocity of the meshing point and the half-bandwidth of the time domain contact have the greatest influence on the average heat flow density; the average heat flow density distribution of the driving wheel and the driven wheel are similar. The heat flow density of the driving wheel is greater than that of the driven wheel. Tooth shape modification minimizes tooth surface meshing contact stress, reduces meshing heat generation, controls temperature rise and improves transmission reliability.
Structural design for a hybrid stone carving manipulator
Authors: Xing Zhihui , Wang Na , Shang Li , Jia Weiwei , Xia Bingxin 
Published: December 2021

Abstract
With people’s higher and higher requirements for environmental art, a large number of stone carving products are needed in the current urban construction. However, the traditional carving technology and equipment can not meet this demand. The development of robots to complete the processing of stone products, especially for the processing of special-shaped stones with complex shapes such as three-dimensional, multi-faceted and curved surfaces, has great social and economic benefits. In this paper, a stone carving manipulator is designed. In the processing of special-shaped curved stone, the structure of 3-TPS/TP hybrid manipulator is adopted, and its kinematic model and Jacobian matrix are established to realize the efficient automatic processing of special-shaped stone.
Research on Integration Framework and Service Adaptation Technology of Space System Simulation Test-bed
Authors: Liu Desheng , Chang Qing 
Published: December 2021

Abstract
Aiming at the requirements of space system simulation test-bed in heterogeneous integration and co-simulation, the support capability of test-bed integration framework is analysed. A space system simulation test-bed integration framework based on bridging adaptation service is constructed, and adaptation services such as protocol adaptation, information publication, information subscription and service control for service oriented architecture are designed and implemented, which provide integration capability and co-simulation management capability for heterogeneous systems, models and components of space system simulation test-bed.
Improved Design of Steel Pipe Transfer Device Turnover Mechanism
Authors: Li Wanling 
Published: December 2021

Abstract
In the steel pipe manufacturing industry, the steel pipe manufacturing process is completed by multiple processes. And on the automatic production line, the transfer process between steel pipe working procedure is realized by the steel pipe transfer device. The unreasonable structural design of related parts in the steel pipe transfer device will result in the failure of the steel pipe transfer process to proceed smoothly, which will directly affect the normal operation of steel pipe production line, resulting in steel pipe productivity’s decrease and causing losses to steel pipe manufacturers. This article proposes an improved design method of the turnover mechanism of transfer device between steel pipe manufacturing processes.
Molecular dynamics study on single particle displacement damage of ZB InN
Authors: Jia Tongxuan , Yang Xie , Wang Zujun , Huo Yonggang , Shang Aiguo , Xue Yuanyuan 
Published: December 2021

Abstract
To evaluate single-particle initial displacement damage of InN, the MD method is used to simulate the cascades, where the energy of PKA (E
PKA) ranges from 1 to 5 keV. From these results, we can find that high EPKA will increase Np and Ns of defects, and aggravate the damage of InN, which is more obvious in Frenkel pairs. The formation efficiency of vacancy and interstitial is influenced by antisite defects, thereby causing the difference between vacancies and interstitials for the same atomic type. About the distribution of InN defects, it is mainly caused by vacancy defects, indicating that vacancy damage occupies the main position in displacement damage.
A Virtual Prototyping Model on Dynamic Behaviors of Prefabricated Bridges
Authors: Zhang Jun , He Fang-qian , Jiang Yu-chen 
Published: December 2021

Abstract
With loads on prefabricated bridges becoming more and more heavier, their dynamic behaviors should be paid more attention to. A virtual prototyping model with the object-oriented technology and the mode synthesis method is presented in MATLAB to analyze dynamic behaviors of prefabricated bridges. Using structural characteristics of the bridges properly, substructures can be looked on as objects which can be encapsulated with the mode synthesis method. The compatibility conditions on interfaces, the Lagrange’s equation and Ritz’s variational principle play the role of messages transmitting among objects. Simulation results indicate that the present model can easily study dynamic behaviors of bridges in the same model.
Research on fracture behaviour of the adhesive sealant based on energy failure criterion for TFT-LCD
Authors: Zhang Xu , Yan Huasheng , Li Yuanyuan , Wang Jianming , Cheng Zaijun 
Published: December 2021

Abstract
The adhesive sealant is a crucial structure connecting color filters and thin film transistors in liquid crystal panels. Research on the fracture progress of the connection structure is heavily needed in reliability evaluation engineering. In this work, three types of adhesive sealants with different widths were tested by the uniaxial tensile experiment to obtain their fracture process curves, which conformed to the brittle fracture characteristics described by the bilinear cohesion zone model. Then, according to the theory of engineering fracture mechanics, the Dugdale-Barenblatt plastic zone model was employed to analyze the adhesive sealant with hole defects, and it was simplified to mode ? fracture mechanics problem. Calculating with finite element numerical simulation, the numerical relationship between the stress field of the internal defect and the external stress of the material was obtained, and the brittle fracture behavior model was deduced as related to the defect size. Applying the model to the adhesive sealant, the average error of the model value after the correction was reduced from 7.98-12.13% to 6.84-7.53%, and the overall error was only within 15%. The model includes the material’s basic characteristics and the defect’s size that affect the fracture process, provides a theoretical basis for predicting the fracture of the sealant and improving the strength of bonded joints, thus is of great significance for material application and fracture analysis in engineering.
7th World Multidisciplinary Earth Sciences Symposium - WMESS 2021
Authors: Yilmaz Isik , Marschalko Marian , Drusa Marian 
Published: December 2021

The current “IOP Conference Series: Earth and Environmental Science (EES)” volume includes papers presented in the capital city of the Czech Republic, Prague for the 7th Anniversary of the “World Multidisciplinary Earth Sciences Symposium” from 6th September to 10th September 2021. The purpose of the WMESS 2021 is to give a place to converse and consider the current data, discoveries, and mechanics in various areas of Earth Sciences, to provide favourable circumstances for forthcoming cooperation. It is a stage for contributing information and skills in the areas of Earth Sciences, by arranging a conference for researchers at the beginning of their career and letting them present their findings and leave them space to discuss it with for the presentation of their work and discussion of their ideas with specialists in diverse fields of Earth Sciences.
WMESS 2021 (www.mess-earth.org) is the 7th of the Annual series. The main aim of WMESS 2021 is to make work in multidisciplinary studies connected with Earth Sciences and to develop collaborations with researchers. WMESS 2021 arranged a conference for varying studies communicating the most recent findings and recording arising knowledge of connected systems and our place in them.
We give our deep appreciation to the respected Scientific Committee and Institutional Scientific Partners of WMESS 2021. The Scientific Committee and Institutional Scientific Partners of WMESS 2021 were achieved by paying rigorous concentration, and all members were picked from acclaimed, highly valued, creative scientific communities representing countries from all around the world.
List of Editors of WMESS 2021, Committee WMESS 2021 are available in this pdf.
Mineralization in the andesitic lava from Kildyam volcanic complex, central Yakutia, Russia
Authors: Kostin Aleksey 
Published: December 2021

Abstract
This contribution presents the first detailed analysis of a new volcanic succession of olivine-pyroxenites, andesite, and dacite discovered in the Kildyam Late Jurassic complex in Central Yakutia. Petrographic and microprobe studies confirmed the liquid immiscibility in silicate melts during crystallization. Immiscible liquids are preserved as globules of one glass in another in andesites and as melted inclusions of native iron in matrix, clinopyroxene and plagioclase phenocrysts. Our analyses reveal the complex textural relationships between silicates and Fe-oxides, native iron and (Cu, Pb, Ag and Au)-rich phases, and provide unequivocal textural evidences, not observed previously. Purpose of this research is to preserve a very important data on IO (Iron Oxide) or IOCG (Iron Oxide Copper Gold) mineralization. Obtained results support occurrence and diverse of gold, silver, copper and lead minerals in magnetite lavas. During the early stage of fine-grained subvolcanic olivine-clinopyroxenite end pyrrhotite, globular igneous sulfides is a first proposed style of economic deposit formation. The second proposed style of economic mineralization in Kildyam is to be a magnetite-bearing lava; iron enrichment of the melilitic melt phase, followed by iron depletion and silica enrichment. The vesicle-hosted alloys and sulfides provide significant new data on metal transport and precipitation from high-temperature magmatic vapors. During syneruptive vapor phase exsolution, volatile metals (Cu-Zn, Fe-Al-Cu, Ni-Fe-Cu-Sn) and Ag-Cu-sulfides contribute to the formation of economic concentrations. Major conclusions contribute to 3-step genetic model. (1) Early-formed magmatic minerals led to partial dissolution of olivine-clinopyroxenite and their enrichment in Cu, Co and Ni relative to other metals, while troilite globules droplets grew.(2) First stage of division into two immiscible silicate and sulfide melt liquids (a) K-rich dacitic and rhyolithic glass, and (b) vesicles of heavy sulfide minerals with a large segregations and drops of native iron. (3) Lava of fused magnetite crystals and voids enriched in silver and gold, and (b) globular disseminated chalcopyrite in mineralized melilitic rocks.
The Diversity and Ecology of Macromycetes on Soils of Adjara, Georgia
Authors: Shainidze Otar , Beridze Nodar , Chkubadze Guram , Nakashidze Nunu , Lamparadze Shota , Lominadze Shota , Turmanidze Mamuka 
Published: December 2021

Abstract
The publication is devoted to the study of the diversity of the species composition of macromycetes on different soils of Adjara, Georgia. The aim of the study was to identify and determine the composition of on different macroscopic fungi in different soils; establishment of the scale of development and spread of macromycetes in adverse and favorable conditions. Morphological features of collected fruiting bodies, such as shape, size, colour, odor, hymenophore and velum types, etc., were analysed. Spore slides were prepared in glycerin and fuchsin acid and observed under a light microscope. Some samples were isolated on a Malt agar medium, and macroscopic and microscopic characteristics of isolates were observed for precise identification. Identifications were done using relevant literature. At locations in the outdoor area and in the greenhouse, a total of 165 macrofungal species were recorded fruiting on soil, between them 35 species are considered edible, 14 poisonous, while 106 species are inedible Most of the species belong to the division Basidiomycota (151) and only 14 to the division Ascomycota. Identified species distributed in 5 Classes, 13 Orders, 36 families and 68 Genuse. The highest number of soil-inhabiting basidiomycetous macrofungal species was in the forest soil plot (116), followed by the Pasture soil (29). The on families with the highest number of species was Russulaceae (17%), Agaricaceae (15%), Boletaceae (12%), Cortinariaceae (9%) and Psathyrellaceae - 8%, The remaining 31 families-39%. Lactarius, Cortinarius, Russula, Amanita and et al., were the richest genus. All 6 substrates studied, it observed that the species that had a higher frequency were Agaricus subrufescens, Calvatia cyathiformis and Leucocoprinus cretaceus, occurring in soil, soil/litter and pasture. On the other hand, Agaricus campestris, A. rufoaurantiacus, Chlorophyllum hortense and Volvopluteus earlier among others, were collected only from two substrates (soil/and plant residue). The other genera (most of it) occurred in only one substrate. Peaks macromycetes was in May and October, when the average temperature remained between 22 - 26°C and relative humidity between 78% and 92%. The occurrence of macromycetes was higher in May, when the temperature was milder and stable on average 24°C. Found that Adjara support a large and diverse community of macrofungi fruiting on soil, many species of which are previously undiscovered and undescribed. On this basis, works of longer duration and more intensive sampling are needed to obtain data regarding fungal communities, with more attention to specific variables such as microclimate, soil moisture, soil type, soil pH and vegetation types.
A brief survey on the availability of satellite air pollution data
Authors: Cukjati Jernej , Mongus Domen , Žalik Borut 
Published: December 2021

Abstract
Satellite air pollution data sources are presented in this article. Satellite missions are listed and described, and corresponding instruments measuring the concentration of greenhouse gases or other parameters that affect air pollution. Main data hubs are enumerated, and other platforms providing access to the data in different formats. Some platforms contain tools and services that have the capabilities to process and store the satellite data further. Most of them also provide the visualisation of the data, and other simplifications for data selection.