bluuebunny/crossref_metadata_2025_split huggingface dataset:
Removal of fine particles in coal fired power plant by chemical coagulation
Authors: Zhang Xue-Yan , Xiao Li-Chun , Zhai Xiao-Yu 
Published: March 2021

Abstract
The fine particle dust produced by coal-fired power plants is one of the important sources of air pollutants. Wet electrostatic precipitator (WESP) is one of the effective methods to remove fine particle dust. However, the traditional wet electrostatic precipitator still has low collection efficiency for the superfine particle dust. To improve the collection efficiency and the chemical coagulation method is applied to the wet electrostatic precipitator. Experiments are carried out by varying the chemical coagulation agent type, concentration, surfactant species. The results show that: Adding chemical coagulants can promote the coagulation effect of fine particles, and Xanthan gum (XTG) has the best coagulation effect; the concentration of chemical coagulant also affects the coagulation effect and collection efficiency of dust, the optimal concentration of XTG is 1.0×10−2 g/L; among the surfactants, dodecyl dimethyl benzyl ammonium chloride (1227) has the best effect, and the dust removal efficiency can reach 98.80%. Through experimental exploration, the chemical coagulation method has a good application prospect in wet electrostatic precipitators.
High-throughput sequencing method to study the dynamic changes of microbial communities in second-generation fermented lettuce
Authors: Zhang Yao , Chen Zhidi , Wang Xinyu , Li Qingwen , Gao Xiuzhi , Yi Xinxin , Ma Yumeng 
Published: March 2021

Abstract
Pickle has been loved by consumers since ancient times because of its unique taste, strong flavor, simple process and long shelf life. Complex microbial succession activities promote the fermentation process of pickle. In this paper, high-throughput sequencing methods were used to study the bacterial microbial dynamics of the second-round fermentation lettuce artificially inoculated with Lactobacillus. The results showed that as the fermentation progressed, at the bacterial genus level, Lactobacillus are the dominant genus in the fermentation process. In the late fermentation stage, the dynamic changes of microorganisms tend to be stable. These results provide ideas and new strategies for the development of pickle products using lettuce as the main vegetable raw material.
Study on preparation and treatment of phosphorus removal performance with M/Mg/Al (M=Zn/Co/Cu) hydrotalcites
Authors: Huang Zhiyong , Liu Hongbo , Xu Peiwen 
Published: March 2021

Abstract
A series of M/Mg/Al (M=Zn/Co/Cu) hydrotalcites were synthesized by co-precipitation method. XRD was used to characterize their structure. The results showed that the prepared hydrotalcites samples have typical hydrotalcite structure with high crystalline. The hydrotalcites samples were used as absorbent in the treatment of phosphorus removal of wastewater. Single factor control variable method was used to study the relationship between the conditions such as the type of metal, synthesis condition, preparation method, calcination time, type of absorbent, and the adsorption ability of phosphorus in wastewater. The results showed that Zn/Mg/Al hydrotalcites have better phosphorus removal ability than the Mg/Al, Co/Mg/Al and Cu/Mg/Al hydrotalcites. Zn/Mg/Al hydrotalcites prepared with the metal ratio of Zn/Mg/A=3:1:1, reaction temperature of 75 °C, pH of 11 has the best phosphorus removal effect. After calcained at 300 °C for 4h, the Zn/Mg/Al hydrotalcites has the best phosphorus removal efficiency of 76.6%. Zn/Mg/Al hydrotalcites have much better phosphorus removal efficiency than active carbon.
Research Process on Water Treatment Agent of Boiler for Preventing Metal Corrosion in the Steam-water Cycle
Authors: Zhao Zhijuan , Peng Yunyan , Jin Dong 
Published: March 2021

Abstract
The safe and economical operation of boiler is influenced significantly by the metal corrosion in the steam-water cycle. It is the most common way to add the water treatment agents into the boiler water to prevent metal corrosion. In this paper, the application situation and limitations of the traditional boiler water treatment agents were summarized. Then the research process of the film-forming amines was elaborated. First, the structure and composition of film-forming amines, their properties and the interaction mechanisms with metal materials were described. Second, the industrial application of the film-forming amines was considered. Third, the existing problems of film-forming amines were discussed. Finally the future development of the novel film-forming amines was prospected.
The effect of periodic porous Al on the heat transfer performance of paraffin
Authors: Deng Xing , Liu Fei , Zhang Zhengwen , Zhang Tao 
Published: March 2021

Abstract
In order to enhance the heat transfer performance of paraffin, periodic porous lattice structures was designed by triply periodic minimal surface method and formed by selective laser melting(SLM) technology as the heat conduction enhancer of paraffin. Porous Al/paraffin composite phase change materials(PCM) with were prepared by dipping and a phase change heat storage experiment platform was built to study the effect of periodic porous Al structure on the heat transfer performance of paraffin. The results show that the melting characteristics of the paraffin have been significantly improved with the periodic porous Al structure embedded in. The melting rate is greatly increased, the melting time is shortened by more than 61.7%, and the internal temperature gradient during melting is reduced by 41%.
Compared with rubber and amalgam materials, pure titanium materials have advantages in dental prosthesis development
Authors: Jin Huang 
Published: March 2021

Abstract
Prosthodontics is the most common problem in Chinese dentistry. So far, most dental prosthetics in China are made of rubber and metal fillers. However, the fillings made of these two materials are prone to frequent dental fillings and complex operation process of root canal fillings. Amalgam metal filler is easy to cause safety hazards. It’s also acidic. The effect of amalgam on blood circulation can further lead to a decrease in immunity. In this paper, the application of pure titanium in the oral cavity can reduce the problems caused by rubber and metal materials. At present, the difficulties encountered in the study are obvious burning sensation, severe heavy metal smell and significant pain. Only by solving the existing problems can the development of pure titanium make progress.
Study on the changes of chemical constituents of Pueraria lobata during fermentation
Authors: Li Zhenxing , Shan Xuemei , Song Ying , Gao Yuan 
Published: March 2021

Abstract
At present, Pueraria lobata has become an important raw material in the field of health food and medicine, and research on its processing has gradually increased. As a result, Pueraria lobata fermentation technology has also been further researched and expanded. Based on this, this article discusses the fermentation of Pueraria lobata from a chemical point of view, and discusses in detail the changes of the main constituents as well as the change mechanism, in order to provide references for similar work in the future to improve the quality of the fermentation products of Pueraria lobata.
A ML framework to predict permeability of highly porous media based on PSD
Authors: Yang Haoyu , Ke Yan , Zhang Duo 
Published: March 2021

Abstract
Using machine learning (ML) method to predict permeability of porous media has shown great potential in recent years. A current problem is the lack of effective models to account for highly porous media with dilated pores. This study includes (1) generation of media (porosity = 0.8) via a Boolean process, (2) the pore size distribution (PSD) control by using different groups of homogeneous packed spherical particles (3) PSD data obtainment using the spherical contact distribution model (4) computation of the permeability via LBM simulations, (4) training of artificial neuron network (ANN) and (5) analysis of the model. It is found that the PSD could outperform the previous geometry descriptors as an input of ML framework to deal with highly porous structures with different fractions of dilated pores, however there is still room for precision enhancement.
Screening and Array Optimization of Metal-Oxide-Semiconductor Gas Sensing Materials
Authors: Yang Shu , Gao Shi , Wang Xuefeng , Qian Tingbi 
Published: March 2021

Abstract
Metal-Oxide-Semiconductor(MOS) based gas sensor is considered to be a promising method for harmful gas detection, but the detection usually needs to meet the conditions of excellent selectivity, high responsivity, quick response, low power consumption, low detection concentration limit, etc. To improve the performance of the sensor, materials need to be screened and array need to be optimized. This paper will briefly introduce the research on MOS gas sensing materials screening and array optimization.
Study on Air Quality Monitoring and Numerical Simulation Optimization in Shenyang Metro Station
Authors: Hao Hong , Song Xinyi , Zhang Yidan , Zhang Hailong 
Published: March 2021

Abstract
Air quality monitoring was carried out at the three stations A, B and C of Line 1, Line 2 and Line 9 of Shenyang Subway station. CO2, formaldehyde, TVOC and PM2.5 were selected as pollutants. The results indicate that because the platform floor is far from the ground and there is almost no natural ventilation, the concentration of pollutants is higher than that of the station hall floor. The formaldehyde concentration of the newly built site A exceeded the standard by 37.1%. CFD was used for numerical simulation, and the section with human respiratory height Z=1.5m was selected as a typical section. The cloud map of temperature, velocity and concentration distribution of typical pollutants were analyzed to find out the areas where the concentration of pollutants exceeded the standard and analyze the reasons. The layout of tuyere which can improve the air quality in subway station is proposed, and the simulation and optimization research is carried out.
Optimization Study on Gas Control of Coal Preparation Plant Bunker
Authors: Chen Bin 
Published: March 2021

Abstract
According to Zhao Zhuang coal mine coal preparation plant of coal field, this paper adopt methods of theoretical analysis, monitoring and test research, studied the distribution of gas migration regularity and optimized the structure of coal preparation plant bunker. Adopt the natural ventilation system to replace the original coal power fan system, effectively controlled of the coal gas concentration below 0.5%, and obtained the good effect of gas control, and created the better economic and social benefits. This study is of great significance to the control of coal bunker gas in other mining areas.
Influence of porosity on the fatigue behaviour of welded joints
Authors: Livieri P , Tovo R 
Published: March 2021

Abstract
In this paper, the influence of a single pore on the fatigue behaviour of welded joints has been examined by means of the implicit gradient approach. The pore has been considered a stress raiser that interacts with the weld toe or weld root. As an example, in the case of a cruciform joint with a load-carrying fillet weld, the influence of a single spherical pore is examined. Furthermore, the fatigue behaviour of an aluminium laser welded joint with ellipsoid equivalent pores is considered and a comparison is made with the fatigue strength of an aluminium arc welded joint.
Thermal Insulation Performance Optimization of Hollow Bricks Made up of 3D Printable Rubber-Cement Mortars: Material Properties and FEM-based Modelling
Authors: Sambucci M , Valente M 
Published: March 2021

Abstract
Sustainable construction is attracting more attention lately. It involves the design of eco-friendly building structures, the reduction of energy consumption and waste, the use of renewable and recyclable resources, and the enhancement of low-impact manufacturing methods. This paper addresses some of these sustainability questions, in the context of the use of tire recycled rubber particles as aggregates of cement mortars suitable for Additive Manufacturing (AM) processes. Specifically, the effect of rubber aggregates on physical and thermal properties was investigated, to evaluate the heat-insulating performance of the compounds. The lightweight and non-polar nature of rubber improve the thermal insulation and physical-structural properties of the material, in terms of thermal conductivity, unit weight, and porosity respectively. However, these effects are closely related to the particle size and their adhesion with the cement matrix. In the second part of the manuscript, applicability study of rubber-cement compounds based on the design and finite element method (FEM)-based thermal analysis of innovative hollow bricks is presented. Fractal cavities were investigated as a functional inner architecture to improve the thermal behavior of the component. FEM results show an increase of more than 30% in thermal resistance (RT) for fractal-based brick compared to conventional designs, demonstrating that the holes’ geometric irregularity is a key feature in the thermal flow attenuation.
Automated Shape Adjustment of Interlocking Joints for Structurally Informed Design of Masonry Block Assemblages
Authors: Mousavian Elham , Casapulla Claudia 
Published: March 2021

Abstract
This paper introduces a tool to design structurally informed assemblages of interlocking blocks. First, the static problem of limit analysis is extended to assemblages with openings and a running bond pattern. Then, a method to measure the assemblage infeasibility due to the sliding resistance violation (namely sliding infeasibility) is described. An optimization procedure is finally presented to minimise the measured sliding infeasibility by automatically changing the shape of interlocking joints.
A Digital Logbook as an Interactive Tool to Fulfil Service Companies’ Needs and Requirements in Building Renovations
Authors: Signorini Martina , Spagnolo Sonia Lupica , Dejaco Mario Claudio 
Published: March 2021

Abstract
The lack of an appropriate information management along the life cycle of a construction work is one of the major issues that AEC sector is facing. The collection and exchange of information is already complex for new buildings, but it becomes even more difficult for renovations. Thus, the building logbook could have an essential role in improving the availability and quality of data for several stakeholders involved in the building process. The repository of building-related information, such as energy consumption and production or maintenance operations, is a bilateral tool to connect users and third parties. The aim of the paper is to present the digital logbook developed within BIM4EEB, an ongoing Horizon2020 project that has analysed firstly the needs and requirements necessary for its development and then it has defined its structure in order to be stored and accessed inside the BIM management system.
Effect of algae fuel addition on fuel consumption and thermal efficiency of single cylinder diesel engine
Authors: Sharudin Hazim , Rahim N.A. , Ismail N.I. , Mat Sharzali Che , Abdullah Nik Rosli , Zulkifli N.W.M. , Yusoff M.N.A.M. 
Published: March 2021

Abstract
The objective of this paper is to evaluate the brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE) of algae fuel blended in diesel fuel. Fuel blends of 1% of algae fuel (B1), 2% of algae fuel (B2), 3% of algae fuel (B3) and 4% of algae fuel (B4) to each 100 ml of fuel blend volume were prepared. Each algae-diesel fuel blend was tested on single-cylinder diesel engine by varying the engine loads (0, 2, 4 and 6 Nm) at a constant engine speed of 1500 rpm. Different BTE and BSFC engine performance levels were the measured parameters. Based on the result of the engine performance tests, it can be concluded that B4 blends in diesel fuel produced better BTE with 17% at 4 Nm engine load than diesel fuel. Meanwhile, the BSFC was lower for B4 with 16% compared to diesel fuel at lower engine load.
Performance Evaluation of Titanium Dioxide (TiO2) Nano Cutting Fluids in CNC Turning of Aluminium Alloy (AL319) via Minimum Quantity Lubricant (MQL) Technique
Authors: Zainal Ariffin S. , Redhwan A.A.M. , Arifuddin A. , Aminullah A.R.M. , Azim M.S. , Nughoro W. , Syafiq A.M. , Efendee A.M. 
Published: March 2021

Abstract
Aluminium alloy AL319 is a common alloy that has superior mechanical properties such as hardness and weldability. Nanofluids can be applied to various industrial widely in the aircraft, automotive industry and engineering problems, such as heat exchangers, cooling of electronic equipment, and chemical processes. This research objective focuses on evaluating the performance of Nano cutting fluid mixing titanium dioxide (TiO2) in CNC Turning using material AL319 Aluminium Alloy with MQL technique. The cutting performance is assessed in terms of surface roughness, cutting temperature, and tool wear was investigated. Machining parameters used for spindle speeds of 1000 to 1800 rpm and feed speeds of 0.10 to 0.20 mm / rev are used on CNC turning machines. MQL pressure is constant at 0.5 Mpa, and for parameters of TiO2 Nano liquid with concentrations of three volumes (0.5, 1.0, and 1.5%) was then compared with conventional CNC cutting liquid. Beforehand, TiO2 is diffused in CNC conventional coolant base by using the one-step method. Response surface method (RSM) via Face Centered Design (FCD) was used in designing the experimental use of the variance analysis (ANOVA) to determine which parameters are statistically important. The stability of TiO2 Nano cutting fluid is checked via visual sedimentation. The experiment concluded that the lowest cutting temperature of 28°C and surface roughness of 0.863 μm Ra when TiO2 Nano cutting fluid with 1.5% volume concentration is employed. The TiO2 Nano cutting fluids are recommended in future work to obtain more significant results. The experimental research reveals that the performance of TiO2 Nanofluid in terms of surface roughness, cutting temperature, and tool wear are found to be better compared to dry machining, wet, and MQL machining using conventional cutting fluid. Nanofluids can be considered as the future of heat transfer fluids in various heat transfer applications. They are expected to give better thermal performance than conventional fluids due to the presence of suspended nanoparticles which have high thermal conductivity.
Design optimization of passenger SUV’s crash box and bumper beam by using finite element method
Authors: Nasution Ahmad Yunus , Rejab Mohd Ruzaimi Mat , Ma Quanjin , Firmansyah Mohamad Ardy 
Published: March 2021

Abstract
The accident cases with front crash type occupy the largest data statistics with 7,372 cases. Theoretically, the accident cases which involve passenger cars, kinetic energy is absorbed by the complex system. Some components which are included in the system are crash box and bumper beam. The main purpose of this research is to obtain the absorption of kinetic energy when the accident happened, types of deformation, and optimization in the existing designs of crash box and bumper beam from vehicle unit. Finite element method combines with analytical value are used in the simulation. Whereas, the software used in solid modelling is SolidWork and the numerical analysis used in this research is Abaqus / Explicit. The average reaction force through simulation is obtained by averaging the results of curve plotting, while the average reaction force is obtained through formula analysis by taking material property and dimension data and then inputting it in the calculation. From the simulation, energy absorbed is 9,912 Joule from the whole original structure. The energy absorbed is less than the crash box work which is 14,066 Joule within an error value of 22 %. This is caused by the bending moment which is emerged by bumper beam. Then, optimization is done by increasing lateral lengths of bumper beam with 20 mm, 15 mm and 10 mm, therefore energy absorption increased with 20,362 Joule, 31,886 Joule and 16,348 Joule, respectively.
Methodology to calculate the required number of spare parts in order to ensure the required operability of equipment parks
Authors: Kim B G , Shakir Z N 
Published: March 2021

Abstract
Comprehensive mechanization of work is accompanied by large expenditures for ensuring the serviceability and operability of the machines fleet. There is an almost constant need for spare elements (machines, units, parts) to maintain the required use level of machines and equipment, as well as to perform work on schedule. An algorithm of actions allowed finding a rational level of redundancy for machines and their parts under various operating conditions and constructive improvement of technology. The article showed that the rate of failure is influenced by the natural and climatic factor, the "age" of machines, and other conditions. Optimization of the companies’ repair policy in terms of ensuring the serviceability of equipment is a complex multi-vector problem. The described methodology makes it possible to determine the necessary range and volumes of spare elements for a known fleet of machines at a given load and under the conditions of ensuring the calculated level of reliability and serviceability of the equipment, maintenance, and repair. The application of the proposed method allows optimizing the cost of spare elements while ensuring the established level of reliable operation for machines and technological sets of equipment. Also, it becomes possible to obtain rational solutions for the formation of a warehouses network on different levels to meet the needs of firms with the dispersed operation of machines and mechanisms at a large number of objects.
Imbalance in the hydrotechnical structure of seaspan lift-transition bridge in sea ferry crossing
Authors: Kligunov E S , Pozynich K P 
Published: March 2021

Abstract
The article is devoted to the problem of reliability of functioning of onshore structures of transport systems using the example of railway ferry crossing. A brief assessment of the role ferry crossings at the current stage of the development railway and sea transport was given. The approach to the verification calculation of lifting mechanisms, suspension elements and counterweight devices of the sea span lift-transition road-railway bridge of stage I of the Vanino-Kholmsk ferry complex in the sea port of Kholmsk for the possibility of their use due to an increase in the weight of the span structure after repair was proposed and justified.