bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the Collaborative Running Mechanism Oriented to Reverse Designing Services of Engineering Projects Based on Revit
Authors: Hong Jing 
Published: August 2020

Abstract
With the application and promotion of BIM technology in the field of building construction, the role and position of construction companies in adopting BIM technology to serve building construction activities is becoming increasingly important. Due to the unidirectional nature of the current BIM technology resource’s dominant behavior, the 3D modeling design, involved in the visual display of BIM technology, is mainly undertaken by construction companies, and it brings the asymmetry of building information’s management and interaction. Taking the application of Revit designing software as an example, in order to communicate with project designers and construction contractors on the interactive questions of reverse designing, and achieve the application effects of BIM technology resources, this paper designs the collaborative running model of engineering project’s BIM technology services from the perspective of building service collectivization, and expounds the collaborative running mechanism oriented to reverse designing services, so as to effectively serve the engineering project’s construction activities including bidding quotation, commencement preparation, construction process and completion and delivery.
Study on the reservoir dam slope stability considering the effect of seepage
Authors: Zhang Yiwen , Zhang Xiwen , Wang Zhen , Zhu Weidong 
Published: August 2020

Abstract
Water conservancy dam plays a significant role in flood control, power generation, shipping, irrigation, aquaculture, tourism, urban water supply and so on. The stability of the dam is extremely important in the engineering design and research processes. Based on the basic principles of finite difference and strength reduction methods, the software of FLAC3D is adopted to analyze the stability of the dam, considering the seepage state, the reservoir water level height and the seepage coefficient of the dam body. The results show that with the increase of the reservoir water level, the seepage behavior of the dam body is more obvious, and the horizontal displacement of the dam increases, while the dam slip safety factor is reduced. With the increase of the seepage coefficient of the dam body, the seepage discharge at the dam foot increases linearly, and the stability of the dam body decreases obviously. The seepage of dam foundation and dam slope stability is evaluated in this research. It is found that the reservoir water level and the dam body permeability are the important factors affecting the dam slope stability, so it is necessary to enhance the anti-seepage measures during the dam design and construction.
Research on the Influence of Near-Fault Round Motion Pulse Characteristics on Seismic Response of Base-Isolated Structures
Authors: Wang Yanan , Liu Yonghui , Wang Hairong 
Published: August 2020

Abstract
The time-frequency distribution of near-fault pulsed ground motion is different from that of ordinary ground motion because of its long period, short duration and high energy acceleration pulse effect, which has a significant influence on the structure with long natural vibration period, such as isolated structure. In this paper, the pulse characteristics of near-fault seismic records and their influence on the seismic response of isolated layer and superstructure are studied by selecting near-fault pulsed seismic records and far-field common seismic records as external excitation. The results show that compared with the far-field ordinary seismic waves, the 3D Hilbert amplitude spectrum of near-fault pulsed seismic waves is distributed in the low frequency region and the middle and late time domain, and the amplitude is also larger. The first natural vibration frequency of the isolated structure is located at the peak of the power spectrum of the near fault pulse wave, which makes the seismic response of the isolated structure in the near fault pulse type seismic record obviously larger than that in the far field common seismic record. The intensity indexes Sa(T1) and Sd(T1) of near-fault pulsed ground motion are greater than those of ordinary ground motion. The relationship between them and structural seismic response should be studied in depth.
Noise Reduction Model of Blasting Seismic Wave Signal
Authors: Sun Miao , Wu Li , Yuan Qing , Zhou Yuchun , Ma Chenyang , Wang Yufeng 
Published: August 2020

Abstract
The existence of noise will make the results of time-frequency analysis of blasting seismic wave lack of authenticity. In order to obtain the real blasting vibration characteristics, a method based on the complementary ensemble empirical mode decomposition with adaptive noise and establishing objective function is proposed. The process of noise reduction is divided into three steps. Firstly, the noise signal is decomposed by the complete ensemble empirical mode decomposition with adaptive noise, and the noise reduction algorithm is established based on the intrinsic mode function obtained from the decomposition; secondly, the objective function considering the smoothness of the noise reduction algorithm and its correlation with the measured signal is established; finally, the algorithm corresponding to the optimal solution of the objective function is found, which is the noise reduction model of blasting seismic wave signal. The model is applied to the de-noising of blasting seismic signal, and the de-noising ability of the model is analyzed by the noise reduction error ratio. The analysis results show that the model can reduce the noise of the seismic monitoring signal with noise on the premise of fully preserving the real components of the blasting seismic signal.
Study on the Influence of Marine Environment Control on Industrial Structure Adjustment of Manufacturing Industry in Hainan Province
Authors: Wang Lin 
Published: August 2020

Abstract
In the background of Hainan Province, this paper analyzes the dual impacts of ocean environmental control on manufacturing industrial structure upgrading and pollution Industry shift. Our studies shows that there exists a positive “U” relationship between marine environmental remediation and pollution industry migrate, industrial structure promotion. According to these two break points, the impact of ocean environmental protection on Hainan’s industrial structure regulation can be classified into the following periods: double inhibition of shift and promotion, priority of transfer and twofold promotion of shift and upgrading. Hainan is in the stage of double inhibition. Besides, in the impact of ocean environmental control on manufacturing structure upgrading, technological innovation has intermediary effects in command control, economic incentives, chemical oxygen demand and so on. Yer, this influence does not show significance in the case of cyanide regulations and ammonia nitrogen.
Study on the uneven distribution of vertical space humidity in a rocket testing workshop
Authors: Gu Yufei , Chen Shaojiang , Zhang Lijun , Li Zengguang , Yang Degang 
Published: August 2020

Abstract
In view of the problem of inconsistent air-conditioning delivery and uneven distribution of vertical space humidity in a rocket testworkshop at a coastal launch site, this paper analyzes the cause and mechanism of the problem based on the characteristics of high space air distribution, test plant structure and air-conditioning system. And puts forward the specific measures such as adjusting high-rise space air delivery target, optimizing the air-conditioning control strategy and improving the unit’s dehumidification capacity. These measures provide support for the solution of the problem and the optimal design and transformation of air-conditioning.
CFD simulation of the airflow uniformity in the plant factory
Authors: Fan Ruiqi , Liu Huan , Zhou Shenghan , He Zhongqun , Zhang Xin , Liu Ke , Wang Jinxiao , Yang Qichang , Zheng Yangxia , Lu Wei 
Published: August 2020

Abstract
The growth of horticultural crops is directly affected by the airflow environment in plant factories. In this experiment, a three-dimensional model was established for an indoor artificial light plant factory using computational fluid dynamics (CFD) to simulate the airflow field distribution in the plant factory, the measured value and the simulated value of air velocity were in good agreement, only 10% of the cultivation area was in the range of suitable growth air velocity. The optimization design of airflow field in the plant factory will be developed.
Analysis of Lightning Protection and Grounding Effect of Shared Iron Tower
Authors: Xiaopo Mao , Yaodong Zhang , Xueming Zhou , Zhiqiang Feng , Zeqi Huang , Xiang Ren , Tianru Shi , Jianjin Fu , Junjie Huang 
Published: August 2020

Abstract
By analyzing the lightning protection and grounding requirements of the respective systems of the communication base station and the power tower, the impact of the towers on their respective systems is analyzed. By establishing a simulation calculation model of the shared tower’s grounding grid, a mature algorithm is used to analyze the current distribution of the typical shared tower. And ground potential distribution, so as to obtain the degree of influence of the equipment when the respective system is struck by lightning. According to the impact, the lightning protection grounding technical requirements and common scheme of the shared iron tower are proposed.
Validity of Falling Ball Tester for Measuring Dynamic Elastic Modulus of Soil Subgrade Modulus of Highway
Authors: Xue Yingqi , Wang Luwan , Han Xiaokun , Wang Mengjie 
Published: August 2020

Abstract
The deformation characteristics of geotechnical materials are very important for improving the safety of highways. To determine the reliability and detection accuracy of the falling ball tester, the paper uses standard method and falling ball tester to measure the dynamic elastic modulus of standard components, PPR. The theoretical result is obtained by measuring the dynamic elastic modulus of the one-dimensional member with the single-side reflection method. To calculate the Poisson’s ratio, the transmission method is used to measure the P wave velocity of PPR that is 3 dimensional. In the falling ball tests, two excitation hammers with a diameter of 0.05m and 0.06m are used to measure the dynamic elastic modulus of PPR. By comparing the theoretical results with the values obtained by D50 and D60, it is found that more accurate results can be obtained by D60.
THE SIMULATION OF THE STEADY-STATE CONDITIONS OF ALUMINIUM DIRECT-CHILL CASTING
Authors: Molnar Daniel , Karpati Viktor , Budavari Imre 
Published: August 2020

Abstract
In this research, the simulation of aluminium direct-chill casting has been achieved focused on the fluid flow and thermal conditions. Control Volume Method is used applying the NovaFlow&Solid simulation software and the JMatPro software was used for the calculation of the material properties. 6 ingot geometries were examined using 4 commercial alloys. A hybrid method is developed for the calculation of the material properties and as a result, the temperature profiles and the liquid phase is analysed.
The Effect of Primary Phase Grain Refinement of Al-Si alloys on heat cracking
Authors: Bubenko M. , Molnar D. , Monika T. , Fegyverneki Gy. 
Published: August 2020

Abstract
In this research thermal analysis was carried out for different alloys which use for gravity die cast cylinder heads. The experiments were implemented under industrial conditions. The aim was to examine the effect of the small amount of supplementary grain refining pre-alloy on primary crystallization for hot-crackings. Different evaluating methods of thermal analysis were tested and compared. Results proved that the dosing small amount of grain refining alloy is favorable in the foundry production practice.
Investigation of the formability of polymeric elements in different software environments for the automotive industry
Authors: Zoltán Kovács Péter , Tóka Bence 
Published: August 2020

Abstract
Market-leading injection molding simulation software enables product designers, designers, injection molding tool manufacturers to predict the outcome of their work, making injection molding technology and end product quality much more reliable. This article describes how Moldex3D, with its advanced networking and computational mechanism helps simulate injection molding processes across multiple application areas. In addition, it optimizes product design and manufacturability, thus shortening the time to reach the market and maximizing the return on investment (ROI) of the product.
Detection of neutron irradiaton induced degradation of reactor steel by magnetic method
Authors: Vértesy G , Gasparics A , Uytdenhouwen I , Szenthe I , Gillemot F , Chaouadi R 
Published: August 2020

AbstractA novel nondestructive method, based on step by step measurement of minor magnetic hysteresis loops was used to determine the neutron irradiation induced degradation of nuclear reactor pressure vessel steel material. This method is called Magnetic Adaptive Testing (MAT), and two types of reactor steel material were investigated: base material type 22NiMoCr37 and weld material type 18MND5. Charpy geometry samples were irradiated by neutrons at the BR2 in SCK•CEN. The neutron irradiation generated structural changes in the material. As a result of our measurement, it was shown that this degradation could be detected by MAT measurements. Charpy impact tests were also done on the investigated samples and the results of these measurement were compared with the nondestructively determined magnetic quantities. It was shown that a closely linear correlation existed between the ductile-to-brittle transition temperature (DBTT) and MAT parameters.
Semi-continuous casting and microstructure investigation of the AlSi12 alloy
Authors: Kazup Agota , Karpati Viktor , Hegedus Balazs , Gacsi Zoltan 
Published: August 2020

Abstract
Semi-continuously cast AlSi12 alloy was investigated by our research group at the University of Miskolc in the Institute of Physical Metallurgy, Metalforming and Nanotechnology under laboratory condition. Our goal was to define correlation and tendency between casting parameters and solidified microstructures. The examined alloy is used as filler material, thus cover soldering technology and exchangers are made from it, like car coolers, radiators, air conditioners. During the investigation optical microscope was used for sight of ingot microstructure, secondary dendrite arm spacing was measured in this way and even the amount of primary α-phase.
Fracture mechanical analyses of high strength steels applying experiments and simulation
Authors: Koncsik Zs , Lukács Zs 
Published: August 2020

Abstract
The paper contains information about the experimental and simulation test results of thermomechanically rolled high strength steel. The S960TM material grade was produced by a modern technological process, which provide longer estimated life time, better performance, and due to higher strength enable smaller applied wall thickness, which require less welding activity. The only disadvantage of this material grade is that they can contain material discontinuities in their microstructure. The characterisation of the response of these materials against load can be analysed by fracture mechanical investigation. Fracture mechanical experiments were carried out with three-point bending method, calculating fracture toughness value of crack-tip opening displacement (CTOD). To reduce the complicated real experiment in fracture mechanics, the simulation possibility of fracture mechanical behaviour of the investigated material was applied, using DEFORM software, which gave an acceptable narrowing to the measured phenomenon.
Measurement possibilities of water content in polyamide
Authors: Terjék D V , Kókai E 
Published: August 2020

Abstract
Water content of polyamide is an important parameter, because it has great effect on the elongation, toughness and impact strength. The aim of our research was to determine moisture in polyamide-6 and polyamide-6.6 granules with different pretreatment of the base material. The specimens were prepared and conditioned in distilled water or non-conditioned. Thermogravimetric analysis, moisture analysis and coulometric Karl-Fisher indirect titration were used for the determination of humidity content. We used polyamide granules and flakes, and polyamide nanocomposites filled with montmorillonite for the water content measurements. First, we compared the technics and chose the most applicable to measure the water content in the samples, and made further measurement of polyamide nanocomposites.
Investigation of the tribological properties of nano-scaled ZrO2 and CuO additive in automotive lubricants
Authors: Tóth Á. D. , Knaup J. 
Published: August 2020

Abstract
To improve the fuel efficiency and the lifetime of the internal combustion engines, the lubricants and their additives have to be developed further. One of the possible future engines lubricants can be the nano-sized ceramic particles, which can provide positive tribological properties also in the presence of non-metallic surface materials. This paper presents the results of investigations with the help of ZrO2 and CuO nano-sized ceramic particles. To define the tribological properties of these additives, lubricant samples with different additive-concentrations were prepared and tribologically analysed. The frictional losses of these lubricant samples were analysed by a ball-on-disk sliding friction machine. The worn surface on the test specimens was analysed by different high-resolution microscopes. To define the functional mechanisms of the nano-additives, the worn surfaces were investigated by high resolution scanning electron microscopes. The ZrO2 additive has experimentally shown an excellent wear reduction property (over 40% wear reduction compared with the neat Group 3 base oil) at the optimum mixing concentration of 0.4wt%. Both frictional and wear reduction properties could be determined at the application of CuO additive (15-15% friction coefficient and wear scar diameter reduction) at its optimum concentration (0.5wt%). A copper-yellow layer can be seen on the worn surface of the disc specimens with CuO, which indicates the mechanism of chemical transformation to elementary copper from the cupric-oxide nanoparticle and this elementary copper can be melted on the surface, because of the applied high temperature and high loads during the experiments.
Semi-continuous casting of aluminium alloys
Authors: Karpati Viktor , Hegedus Balazs , Kazup Agota , Ferenczi Tibor , Molnar Daniel , Gacsi Zoltan 
Published: August 2020

Abstract
The target of our experiments is to simulate a complex production process under laboratory conditions. An industrial aluminium production line is examined using a semi-continuous casting device, running preliminary and trial experiments to find the optimal technological parameters for the physical simulation. Be the determination of the correct casting parameters the technological industrial process can be optimized.
Modelling of segregation during injection moulding
Authors: Fris Dorottya Réka , Szabó Ferenc 
Published: August 2020

Abstract
The goal of this study is to establish a proper simulation model of segregation, a phenomenon which causes inhomogeneity in filled polymer products. We did preliminary research, in which we calcinated injection moulded specimens of 80 mm x 80 mm x 2 mm, with 75 μm, 125 μm and 250 μm glass beads with 10 m%, 25 m% and 40 m% filler rates. According to preliminary simulations, the boundary conditions were set and an EDEM model was created.
Characterisation of Inhomogeneous Plastic Deformation of AlMg Sheet Metals During Tensile Tests
Authors: Szalai Sz , Harangozó D , Czinege I 
Published: August 2020

Abstract
The Portrevin-Le-Chatelier (PLC) effect was analysed quantitatively in the selected AlMg alloys with Mg-content between 2,8-4,6%. The propagation and characteristics of PLC bands were detected by digital image correlation (DIC) technique and the parameters of the bands were evaluated from strain distributions of tensile test specimens. In parallel, stress-strain curves were analysed evaluating stress serrations. The numerically defined parameters of changes in stress and strain were used for characterising the PLC effect on the behaviour of different sheet metals. General statements of literature were numerically proven for the tested materials and the effect of magnesium content on stress amplitude was analysed in detail.
Producing compressive stresses in the surface layer of spheroidal graphite cast iron by laser hardening
Authors: Maloveczky Anna , Filep Ádám , Buza Gábor , Vida Ádám 
Published: August 2020

Abstract
The purpose of the examined laser beam induced surface modification technology was to produce compressive stresses in the surface layer of the workpiece. The presence of residual compressive stresses increases the fatigue limit. The compressive stresses generated by investigated laser surface treatment were compared to shot peening technology results, and has been found to be equivalent.
Application of Rietveld refinement in orientated material structures
Authors: Nagy E , Kristály F , Mertinger V 
Published: August 2020

Abstract
The phase analysis based on the X-ray diffraction method is a well-known procedure for determining the phases crystalline in the sample. The phase identification is simple in case of the isotropic powder samples, however the standard investigation protocol cannot always be used, e.g. in case if the presence of anisotropy like preferred orientation (PO) is observed. In case of steels, the diffracted intensity of a given phases is influenced by the directional phase development having a needle character caused by the martensitic transformation; some reflections can even disappear from the diffractograms as a consequence of the strong PO. One impacting consequence of PO is over quantitative evaluation, percentages close to actual values are obtained only if diffracted intensity is integrated for the whole measured 2θ range for each phase and anomalous intensities caused by PO are corrected.
Incorrect quantitative values were obtained by using the full-profile analysis method in the course of our earlier investigations, because no correction method had been available for the recognition and evaluation of the orientated structures in phase-identification of metals. By using the Rietveld refinement method for whole measured 2θ range, both the PO and the size-strain broadening effects are accounted for. Strain results from stress developing in the lattice and can be taken into consideration in the calculated model and results are corrected to accurately describe the real structure. In the course of our research work, orientated, complex structures developing in the Cu-base alloys were investigated by using the Rietveld refinement method. The quantity of phases was determined in the different samples in which clear signs of the used technological processes could be observed in the structures. The character of orientation appearing in the structure was observed, evaluated and the necessary corrections were performed.