bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical Study on Temperature Uniformity of Regenerative Heating Furnace
Authors: Li Hongtao , Zhao Yashan , Ji Yunguang , Xue Shuqi , Liu Yazhi 
Published: January 2020

Abstract
Using CFD simulation technology, the influence of three kinds of operation modes (air change on the same side mode, cross air change mode and staged air change mode) on the temperature uniformity of regenerative heating furnace was studied. The results show that: 1) in the same side air exchange mode, the high temperature area is easy to form in the middle of the furnace, which makes the local temperature of the billet surface high; 2) in the cross air exchange mode, the high temperature area appears in the middle of the furnace, the heat exchange in the middle of the billet is strong, and the heating speed is fast; 3) in the staged air exchange mode, the high temperature area moves to both ends, and the temperature at both ends of the billet is higher than that in the middle. Therefore, in order to keep the temperature of billet constant, the best operation mode of regenerative heating furnace is alternating operation of cross air change mode and staged air change mode.
Study on Calculation of Flue Gas Temperature at the Exit of Heating Furnace of Oil and Gas Field
Authors: Chen Liu , Lin Wang , Bing Jin 
Published: January 2020

Abstract
It is of significance to ascertain the flue gas temperature at the exit of heating furnace, which lays the foundation of thermodynamic calculation of boiler and its design. This study analyses some normal calculation formulas of the flue gas temperature at the exit of heating furnace of oil and gas field, and makes comparisons of different calculation methods via examples. Appropriate parameters are presented, so as to give guide to the design and calculation of heating furnace of oil and gas field.
Analysis of Influence of Atmospheric Parameter Fluctuation on Condenser Pressure
Authors: Zi Pingyang , Chen Youliang , Hao Jiangang , Xie Daxing 
Published: January 2020

Abstract
The influence of atmospheric temperature, humidity and pressure fluctuation on the condenser pressure is analyzed by numerical simulation. The seasons are mainly divided according to the atmospheric humidity range, and the atmospheric data are classified according to the seasons, and the fluctuation range of atmospheric temperature, humidity and pressure in specific seasons is determined, and a simplified condenser pressure coupling calculation model is established. The hypothetical iterative procedure calculates the condenser pressure value within a certain seasonal range and a certain atmospheric parameter fluctuation range. The results show that the atmospheric temperature fluctuations have a great influence on the pressure of the condenser in the spring and autumn, atmospheric humidity and pressure fluctuations have a great influence on the condenser pressure in summer. The primary and secondary analyses were carried out on several parameters of the atmosphere. The influence of temperature on the pressure of the condenser was 93%, the weight of the humidity was 6.2%, and the weight of the pressure was 0.8%, which provided a basis for optimizing the operation mode of the cold end system.
Numerical Simulation Study on Radiation Section of Dehydrogenation Furnace
Authors: Duan Linlin , Liu Cenfan , Chen Sheng , Ji Fang , Deng Guide 
Published: January 2020

Abstract
The three-dimensional numerical simulation of the radiation section of a dehydrogenation furnace was carried out by CFD, the thermal-structure coupling analysis was performed. The full-scale meshing of the geometric model was used in this paper, the temperature field and flow field of the furnace and the furnace tube were simulated. The thermal radiation values and temperature values of the simulation results were compared with the design values, it shows that the simulated values are in good agreement with the designed values. The corresponding numerical calculation can be performed for half or 4/1 of the geometry under the condition with the geometric symmetry of the furnace and the furnace tube being good. The simulation results can provide a reference for the design and optimization of the dehydrogenation furnace.
Effect of Flow Arrangement On Energy Efficiency Index
Authors: Lu Hongliang , Ren Bin , Tang Xiaoying , Xue Xiaolong , He Aini , Li Zhenhua 
Published: January 2020

Abstract
An energy efficiency index (EEI=k/∇pn) was proposed by Zhang et al to rate the energy saving performance of plate heat exchanger, it was also considered to be independent on the heat transfer area and weakly correlated or not correlated with the flow velocity. However, whether EEI as an ideal index is correlated with the structure such as the flow arrangement or not was important and remained to be confirmed by the theoretical or experimental result. The present work was to analyze EEI for 5 heat exchangers with different flow arrangement: parallel flow, counter flow and combined flow by theoretical method. They all were composed of the same 37 pieces of BP type plate with Nu=0.091Re0.73Ptn, Eu=42400Re−0.545. Their inlet velocities between plates and the inlet temperatures for hot and cold fluid were the same and 5 mathematical models were developed. The EEI took into consideration and weighted quantitatively the heat transferred as well as the pressure drop. The comparison verified that the proposed EEI for 5 heat exchangers were different with each other, but 5 heat exchangers with similar flow arrangement were close to each other, less than 5%.
Research Status and Analysis of Biomass Pyrolysis Gasification Technology
Authors: Wang Zhongwei , Zhang Bing , Qi Guoli 
Published: January 2020

Abstract
This paper analyzes the main methods and principles of biomass thermochemical conversion worldwide, introduces common equipment for biomass pyrolysis and gasification, and discusses the current research and numerical simulation of biomass pyrolysis gasification experiments. This paper also analyzes the application status of biomass pyrolysis gasification technology and summarizes the bottleneck problems encountered so as to preliminarily discuss the ways and methods of using biomass pyrolysis gasification to solve tar problems in the future.
Fuel characteristics and explosiveness analysis of pulverized coal industrial boilers in China
Authors: Wang Zhongwei , Zhang Bing , Qi Guoli 
Published: January 2020

Abstract
Pulverized coal industrial boilers are widely used in China in recent years for high thermal efficiency and suitable for contract energy management, especially the in service amount is growing fast in regions like Shanxi, Gansu, Shandong, Tianjin, Liaoning, Hebei, etc. Considering the existing operational safety issues of pulverized coal fired industrial boiler, this article researched the relationship between fuel characteristics including calorific value, volatile, ash, moisture and powder explosion in order to explore and analysis in service pulverized coal industrial boilers explosiveness.
Mechanical Properties and Deformation Behaviour of ARCH and BCT Lattice Structures Manufactured by Selective Laser Melting
Authors: Ding Ruochen , Du Baorui , Yao Jun , Zheng Huilong , Guo Yumeng , Kang Zhenya 
Published: January 2020

Abstract
In this study, a new lattice structure ARCH is proposed, ARCH lattice structure and traditional lattice structures BCT were fabricated from 316 L stainless steel by SLM. Mechanical properties and deformation behavior of the lattice structures were experimentally investigated. The results show that the ARCH lattice structures have better mechanical property and energy absorption capability than BCT lattice structures. Under the same relative density, the compressive strength and elastic modulus of the ARCH lattice structure is 121.27% and 60.48% higher than the BCT lattice structure, and the ARCH lattice structures have better energy absorption properties than the BCT lattice structures.
Comparison of Sliding Wear Properties of 400 Grade Low Alloy Wear-resistant Steels with Different Microstructure
Authors: Pei YingChao , Xia DianXiu , Cong Liang , Wang XueLin , Wang ShouRen , Wang DongYue 
Published: January 2020

Abstract
Comparative study on sliding friction and wear properties of low alloy wear-resistant steel Hardox400 and NM400 at room temperature using Retc multi-function friction and wear tester. The hardness, microstructure and wear surface morphology of the test steel were compared and analyzed by microhardness tester, optical microscope (OM) and scanning electron microscope (SEM). The results show that the wear mechanism of the two kinds of test steels is mainly manifested as abrasive wear and fatigue wear. The Martensite-Bainite Dual Phase Structure in Hardox400 has a good match of strength and toughness, and the sliding wear performance is better than the NM400 of martensite structure.
Optimization of PC-GTAW Orbital Welding Parameters of AISI 304L Stainless Steel Pipe Using ANOVA and Taguchi Method
Authors: Baskoro A S , Kiswanto G , Widyianto A 
Published: January 2020

Abstract
In the present study, the PC-GTAW orbital welding parameters of AISI 304L stainless steel pipe have been optimized by using ANOVA and Taguchi method. The welding method uses Pulsatile Current-GTAW without added material (autogenous). Peak currents were varied in this study and had the same average current of 100 ± 0.5 amperes. The Taguchi method was applied to search for OBW, DoP and UTS that are optimal and L16 Taguchi’s orthogonal array with two factors, four levels and two replications. S/N ratio with a quality character of larger is better (LB) was used to find the maximum value. The results show that raising the peak current would widen the OBW and deepen the DoP but reduce UTS. The 35-C parameter was the optimal parameter to produce OBW and DoP while the 100-C parameter was the optimal parameter to produce maximum UTS.
Influence of Tools Diameters and Plunge Depth on Mechanical Properties of Micro Friction Stir Spot Welding Materials A1100
Authors: Baskoro A.S. , Riyanto A. , Arifardi M.F. , Rupajati P. 
Published: January 2020

Abstract
Welding on thin aluminum alloy material is still relatively difficult, so that appropriate welding technology is needed to joint the ultra-thin aluminum material. One of the processing welding capable of solving to ultra-thin aluminium is micro friction stir spot welding μFSSW). The micro FSSW process is an adaptation of the FSW process where solid-state processes allow the welding process without changes in the basic characteristics of the workpiece. The purpose of this study was to analyze the effect parameters used in this study are pinless tool diameter and plunge depth on micro FSSW. The material used in this study was A1100 with a thickness of 0.42 mm using lap joint. The welding parameters used in this study are tool diameter and plunge depth, where each parameter has three levels. While the response variables observed were mechanical and fractures properties. To analyze maximum shear strength/load using response surface methodology (RSM). Experimental results and analysis of influence tool diameter and plunge depth on micro-friction stir spot welding μFSSW) analysis show that tool diameter and plunge depth are directly proportional to maximum shear load. Furthermore, the smallest hook defect occurs on the tool diameter 5 mm with plunge depth 500 μm.
A Study on Application of Generative Design System in Manufacturing Process
Authors: Hyunjin Chun 
Published: January 2020

Abstract
The paradigm of manufacturing is changing with the recent era of the fourth industrial revolution. In particular, with the rapid development of artificial intelligence technology, tremendous transformation is welcomed in various areas related to manufacturing. This study concentrated on the changes in manufacturing due to the development of a generative design system. It also analyzed how designers design products through a generative design system based on artificial intelligence. The changes in the design part of the manufacturing process through the creative design are as follows: First, once the designer sets up a rough conceptual design, and then enters the conceptual design into the generative design system, the computer provides with a basic form of design. After AI presents multiple designs, designers choose the appropriate and desirable one. Next artificial intelligence puts forward an optimal material proposal considering its function and economics. And the designer reviews this alternative. After the designer’s review, the computer comes up with a final proposal. Much of the design is done by artificial intelligence. This design method will be universal in the future. Therefore, this study analyzed the direction in which the generative design system would develop in the artificial intelligence era. And the results of this study are to present the theoretical basis of the future product design methodology.
Design and Optimization of Vibration Isolation System for Spacecraft Transport Package Box
Authors: Tao Guo , Guangtong Liu , Jie Zhang , Xinyu Li , Wei Wang , Jinghui Guo 
Published: January 2020

Abstract
The damping effect of vibration isolation system for spacecraft transport package box is directly associated with superior or inferior mechanical environment for spacecraft transportation. In this Article, the design process and program for vibration isolation system for spacecraft transport package box were introduced first; followed by analysis on excitation and response during spacecraft transportation by train; finally, an optimization program of vibration isolation system applicable to current working conditions for transportation was given. The results showed that: the frequency of railway road spectrum excitation was concentrated at 1.8Hz and 6.2Hz, indicating that the current vibration isolation system for package box did not have better damping effect. After reducing first-order inherent frequency by about 3Hz, acceleration root mean square may reduce by 40%.
The Test and Verification Methods for the Transportation Vibration Absorption System of Spacecraft
Authors: Guangtong Liu , Xukai  , Guotao  , Qiang Zhang , Liuzhe  
Published: January 2020

Abstract
The complicated road conditions for the transportation of spacecraft give rise to the need for plenty of running tests so as to validate the performance of the vibration absorption System. According to the principles of subscale test, a research is conducted on the approaches to testing the vibration absorption System for the transportation vibration absorption system of spacecraft. Besides, the subscale model and verification system are designed for the vibration absorption System, and the reliability of the vibration absorption system in transit is validated, which provides a means to conduct effective evaluation of the system for energy efficiency and an approach to the optimization design of it.
Factors Affecting the Accuracy of Estimation of BEV Cruising Range
Authors: Zhicheng Sun , Boya Zhou , Tianlu Dai , Qingyu Meng , Zhichao Liu , Yaozong Xu , Su Li 
Published: January 2020

Abstract
As the number of electric vehicles is increasing year by year, the accuracy of electric vehicle cruising range estimation in high and low temperature environments is one of the performances that consumers are very concerned about. In this paper, the accuracy of cruising range estimation is evaluated by the determination of coefficient, and the influence of ambient temperature on the estimation accuracy of cruising range is deeply studied. Eleven electric vehicles were selected to carry out the cruising range test at normal temperature, high temperature and low temperature respectively, and the influence law at ambient temperature of the accuracy of cruising range estimation was obtained. At the same time, the influence of the self-learning function on the accuracy of the cruising range estimation is also studied. Finally, the performance of the estimation of accuracy of the end mileage at different ambient temperatures is analyzed.
Optoelectronic and photonic devices based on transition metal dichalcogenides
Authors: Thakar Kartikey , Lodha Saurabh 
Published: January 2020

Abstract
Transition metal dichalcogenides (TMDCs) are a family of two-dimensional layered materials (2DLMs) with extraordinary optical properties. They present an attractive option for future multi-functional and high-performance optoelectronics. However, much remains to be done to realize a mature technology for commercial applications. In this review article, we describe the progress and scope of TMDC devices in optical and photonic applications. Various photoresponse mechanisms observed in such devices and a brief discussion on measurement and analysis methods are described. Three main types of optoelectronic devices, namely photodetectors, photovoltaics and light-emitting devices are discussed in detail with a focus on device architecture and operation. Examples showing experimental integration of 2DLM-based devices with silicon photonics are also discussed briefly. A wide range of data for key performance metrics is analysed with insights into future directions for device design, processing and characterization that can help overcome present gaps and challenges.
Effect of pH on visible-light-driven photocatalytic degradation of facile synthesized bismuth vanadate nanoparticles
Authors: Josephine A Juliat , Ravi Dhas C , Venkatesh R , Arivukarasan D , Jennifer Christy A , Esther Santhoshi Monica S , Keerthana S 
Published: January 2020

Abstract
Bismuth vanadate (BiVO4) nanoparticles were synthesized by a simple co-precipitation method for different pH conditions (9, 10 and 11). The XRD patterns revealed that the synthesized nanoparticles belong to monoclinic single-phase BiVO4 which was again confirmed from Raman studies. The chemical state of the elements in BiVO4 and surface morphology were investigated using XPS and SEM analysis respectively. The optical absorption and PL studies revealed wide absorption in the visible region with strong emission at 520 nm. The efficiency of the samples was examined from the photocatalytic degradation of Rhodamine B dye.
Reduced impedance in dual substituted strontium cobaltite nanoparticles for renewable energy applications
Authors: Akhtar Tanveer , Anis-ur-Rehman M 
Published: January 2020

Abstract
Sr1−xBaxCo1−xFexO3−δ
(BSCF) nanoparticles were successfully synthesized with three modified wet chemical techniques; composite mediated hydrothermal method (CMHM), without water and surfactants (WOWS) sol-gel and co-precipitation methods. The probable electrical conduction mechanism of synthesized BSCF was explored via complex impedance analysis. Various physicochemical characterization techniques were employed to study the dependence of structure, homogeneity, physical parameters and electrical properties of BSCF on synthesis procedures. X-ray Diffraction (XRD) confirmed the formation of cubic BSCF perovskite structure. Fourier Transform Infrared Spectroscopy (FTIR) spectra indicated the presence of the fingerprint region of perovskite (ABO3−δ
) structure. Scanning Electron Microscopy (SEM) images revealed uniformly diffused, micro porous and agglomerated morphology. Differential Thermal Analysis (DTA) and Thermogravimetry (TGA) verified the formation of intermediate metal carbonates that were decomposed to the final product. Nyquist plots against frequency (20 Hz–3 MHz) revealed single semi-circular arcs. The arc showed significant grain boundary contribution to total electrical conduction behaviour of BSCF material synthesized by CMHM and co-precipitation methods. Modulus analysis showed the Debye type conductivity relaxation in CMHM synthesized material. The AC conductivity graphs followed Jonscher’s power law. Temperature dependent (RT to 600 °C; 10 kHz) impedances showed decreasing trend that was an indication of thermally activated conduction process. A Correlation was established among structural and electrical conduction properties. Hydrothermally synthesized BSCF samples exhibited minimum impedances and maximum AC conductivity, which makes them a potential candidate for cathode material in (IT-SOFCs) applications.
MWCNT induced negative real permittivity in a copolyester of Bisphenol-A with terephthalic and isophthalic acids
Authors: Özdemir Zeynep Güven , Daşdan Dolunay Şakar , Kavak Pelin , Pionteck Jürgen , Pötschke Petra , Voit Brigitte , Mısırlıoğlu Banu Süngü 
Published: January 2020

Abstract
In the present study, the negative real permittivity behavior of a copolyester of bisphenol-A with terephthalic acid and isophthalic acid (PAr) containing 1.5 to 7.5 wt% multi-walled carbon nanotubes (MWCNTs) have been investigated in detail. The structural and morphological analysis of the melt-mixed composites was performed by Fourier transform infrared spectroscopy using attenuated total reflection (FTIR-ATR), atomic force microscopy (AFM), x-ray diffraction (XRD), and light microscopy. The influences of the MWCNT filler on the AC impedance, complex permittivity, and AC conductivity of the PAr polymer matrix were investigated at different operating temperatures varied between 296 K and 373 K. The transition from a negative to positive real permittivity was observed at different crossover frequencies depending on the MWCNT content of the composites whereas pure PAr showed positive values at all frequencies. The negative real permittivity characteristic of the composites was discussed in the context of Drude model.
45% efficiency enhancement of ZnO nanorod bulk-heterojunction solar cells by PbS QDs
Authors: Mehrabian Masood , Afshar Elham Norouzi , Mirzapoor Elham 
Published: January 2020

Abstract
Absorption of near-infrared (NIR) photons of solar energy which includes the ~40% of the sunlight energy is an effective approach to improve the photovoltaic performance of solar cells. In the present study, we have investigated PbS quantum dots (QDs) with different numbers of synthesis cycles (n) were introduced to ZnO nanorods (ZNRs) bulk-heterojunction (BHJ) solar cells. Our analysis revealed improving the power conversion efficiency (PCE) by absorbing the light in the visible and near-infrared regions. The Light absorption of solar cells was enhanced by PbS QDs which led to an increase in the photocurrent. With increasing (n), the PCE increases at first, then it decreases because of the attenuation of possible facilitation of exciton dissociation. For this reason, the number of cycles was optimized. As a result,byoptimizing the numbers of synthesis cycles (n), the PCE of PbS QD sensitized ZNR bulk heterojunction solar cells were improved from 2.76% to 4.01% by 1.45 times.