bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of an Intelligent Feeding System
Authors: Huang Guiyun , Chen Ying , Li Yong , Cui Jian 
Published: March 2024

Abstract
The article elaborates on the design method of an intelligent feeding system . The feeding system is an important part of the automatic production line, which provides raw materials for other units of the automatic production line. It is controlled by PLC, which is described from many aspects, such as structure design, pneumatic circuit design, control circuit design and PLC program design. It analyzes the design idea and principle of intelligent feeding system in detail, and provides an effective reference for the design of automatic production line.
Phase Composition and Analysis of Surface Micromorphology of Animal Medicine Concha Arcae and Calcined Concha Arcae
Authors: Wu Zhifu , Liang Liuchan , Hu Liyun 
Published: March 2024

Abstract
The components of concha arcae and calcined concha arcae were analyzed by X-ray powder diffraction and calculated their contents, and their surface morphology was observed by scanning electron microscope. The experimental results showed that the concha arcae was composed of aragonite type and calcite type calcium carbonate, and calcined concha arcae was composed of calcium oxide, calcium hydroxide and calcium carbonate. The surface micromorphology of them were significantly different. Rietveld refinement can accurately and quickly complete the phase identification and quantitative analysis of raw and calcined products of concha arcae by Powder X-ray diffraction, it is more convenient and fast compared with chemical titration method.
Research Progress in the Treatment of High-Salinity Wastewater
Authors: Zhang Luyao , Zhu Xiaolei , Wang Haonan , Liu Xiaojie 
Published: March 2024

Abstract
The generation of high-salinity wastewater is closely associated with various industries, containing a plethora of dissolved salts such as chlorides, sulfates, and carbonates, which pose a significant threat to the environment and human health. Consequently, the treatment of high-salinity wastewater has emerged as a pivotal environmental challenge in contemporary society. This review aims to elucidate the sources and characteristics of high-salinity wastewater, as well as the current status and trends in the field of high-salinity wastewater treatment. First and foremost, we explore the means by which high-salinity wastewater is generated in different industries and the principal salt components it contains. We revisit conventional methods for high-salinity wastewater treatment, including chemical precipitation, ion exchange, evaporation-crystallization, and reverse osmosis, while emphasizing the application of biotechnological approaches. This includes the utilization of salt-tolerant microorganisms, biological adsorption, biodegradation processes, and various types of bioreactors. Advanced oxidation technologies also play a crucial role in high-salinity wastewater treatment. We introduce advanced oxidation techniques such as ozone oxidation, UV-catalyzed oxidation, and high-pressure water oxidation, emphasizing their potential in degrading organic compounds and reducing salt concentration. Furthermore, we discuss hybrid approaches, such as case studies combining biological treatment with advanced oxidation technologies, and the advantages and challenges associated with these integrated techniques. Finally, we provide an outlook on future trends, including research on novel and efficient biodegrading agents, advancements and innovations in advanced oxidation technologies, and the development of intelligent high-salinity wastewater treatment systems. Policy and industry trends will also influence the direction of high-salinity wastewater treatment field development. In summary, high-salinity wastewater treatment represents a complex and pressing environmental challenge. However, through the integration of diverse treatment technologies and ongoing research efforts, it is anticipated that more effective, cost-efficient, and environmentally friendly solutions can be developed to mitigate the impact of high-salinity wastewater on ecosystems and society.
Research Progress in Microbial Degradation of Microplastics
Authors: Wang Qun , Hong Lei , Wu Ke , Li Mengmeng , Zhang Jie , Li Xu , Jin Jie , Liu Bin 
Published: March 2024

Abstract
The presence of microplastics is increasingly recognized as a major issue in environmental protection across the world, primarily as a result of their long-lasting nature and the potential harm they can inflict on ecosystems.Current methods for degrading microplastics include physical capture, chemical degradation and biological methods.Among them, microbial degradation has received much attention because it is economically feasible and environmentally friendly.This paper reviews the degrading microorganisms, microbial metabolites and microbial degradation mechanisms of three frequently utilized polymers, namely polyethylene, polystyrene and polyethylene terephthalate, and analyses the current problems of microbial degradation of microplastics, in order to provide ideas for the research on the development of microplastic-degrading enzyme preparations.
Preparation and Release Performance of Carboxymethyl Chitosan Gel Microspheres for Spinetoram
Authors: Xu Qing , Yan Changrui , Yang Jiang , Zhou Yuanjing 
Published: March 2024

Abstract
Pesticide controlled release technology is an effective measure to improve the efficiency of pesticide utilization. In this study, the controlled releasing gel microspheres of spinetoram were prepared by suspension-crosslinking. Carboxymethyl chitosan was the carrier, and calcium chloride and glutaraldehyde were the cross-linking agent. The diameter and morphology of microspheres were observed. The thermal stabilities of spinetoram-loaded microspheres were evaluated. The release properties of spinetoram loaded gel microspheres were investigated. The results showed that pesticide loaded microspheres were elastic balls with high strength, more thermal stability than traditional pesticides, and exhibited good performance of pesticide sustained release. The release of spinetoram was governed by the combination of swelling and erosion of carboxymethyl chitosan. This study would provide reference for the application of carboxymethyl chitosan in pesticide reduction and efficiency.
Preparation Technology of Lightweight High-strength Desulphurized Gypsum Block
Authors: Zhang Xiuli , Wang Zhaojia , Mao Jianwei , Huang Wei 
Published: March 2024

Abstract
In this paper, the relationship between the air entraining agent, retarder, lightweight aggregate, water-cement ratio and the performance of gypsum block is studied. Study results showed that the apparent density of gypsum block can be significantly reduced and its strength can be increased by using double mixing technology of air entraining agent and perlite to optimize production process and reduce water-cement ratio and energy consumption.
Research on Ultrasonic Vibration Assisted Grinding Technology of Quartz Fiber Reinforced Ceramic Matrix Composites
Authors: Zhang Pin , Xue Hongming , Ji Haonan 
Published: March 2024

Abstract
Ceramic matrix composites have good mechanical properties and high temperature resistance, but it is difficult to process. In order to solve the problems of fast tool wear and low machining efficiency in the dry grinding process, ultrasonic vibration assisted grinding technology of quartz fiber reinforced ceramic matrix composites is adopted in this paper. Grinding force, machining efficiency, tool wear and surface roughness are analyzed through the comparison experiment between the conventional grinding and the ultrasonic vibration assisted grinding. The influence of the ultrasonic vibration assistance and process parameters on machining quality and tool life is further obtained. According to the findings, when compared to traditional grinding, ultrasonic vibration grinding can lower the grinding force by 25% to 58% and the surface roughness by up to 16%. The tool life and machining efficiency can be significantly increased with the help of ultrasonic vibration.
Daqing Oilfield Cable Controlled Intelligent Separate Injection Technology Process Optimization
Authors: Zhang Weichao , Guo Mingri , Li Jinghui , Wang Lili , Wang Jing 
Published: March 2024

Abstract
The cable controlled intelligent separate injection process realizes the continuous monitoring and real-time measurement and adjustment of downhole parameters, greatly improves the measurement and adjustment efficiency, provides sufficient data for reservoir analysis, and helps to tap the potential of remaining oil in the later stage of ultra-high water cut. However, due to the multi-disciplinary application of downhole tools and complex process, it is found in the previous field test that The number of wells with more than two years of operation of cable controlled intelligent separate injection wells accounts for only 51.9%, which can not meet the needs of large-scale application. Through the fault analysis of the early test well, the key factors affecting the success rate of well completion are found. Aiming at the main problems, the flow control valve of the cable controlled intelligent water distributor, the cable sealing connection process and the well flushing valve structure through the cable packer are optimized and improved. The flow control valve of cable controlled intelligent water distributor is opened and closed smoothly under 10MPa pressure difference, and the leakage is less than 1m³/d; The connection between the cable and the cable controlled intelligent water distributor is sealed reliably, and the cable can pass through the upper and lower joints of the cable packer smoothly; Since the optimization of process technology until January 2023, 223 wells have been tested on site, and the number of wells with more than two years of operation has increased from 56.1% to 91.9%. The stability of the optimized cable controlled intelligent separate injection process has been improved, which lays a foundation for the large-scale application of this technology in the oilfield.
Research of the Bending characteristics of Aero Ball Joints at High Temperature and Pressure
Authors: Wang Yansong , Ren Zhanpeng , Deng Wenliang 
Published: March 2024

Abstract
As a piping element with excellent stress compensation performance, spherical joints are widely used in aerospace piping systems. However, in piping stress simulation, the presence of nonlinear features such as friction vice of the solid model of the spherical joints will lead to the difficulty of convergence of the calculations or the deviation of the results is too large, so in order to improve the convergence of the iterative process, “joint” joints are used to replace and simplify the original spherical joints, but this simplified calculation needs to accurately capture the characteristic parameters (such as bending stiffness and bending friction moment, etc). In order to improve the convergence of the iterative process, “joint” is usually used to replace and simplify the original spherical joint, but this simplified calculation needs to accurately capture the characteristic parameters of the spherical joint (e.g. bending stiffness and bending friction moment, etc.). This paper focuses on the bending characteristics of spherical joints by establishing a high-temperature and high-pressure test platform, and takes into account the difference between the test and the actual use of spherical joints, and further combines numerical simulation and BP neural network methods to predict the characteristics of spherical joints to meet the requirements of the actual use of spherical joints.
Self-hydrolyzing Submerged Flow Technology for Acid Coal Mine Drainage Treatment: Effective Removal of Iron Ions
Authors: Chen Jiancheng , Zhou Yihao , Chen Junwen , Hu Tao , He Peng , Gan Min , Jiang Zongman , Zhu Jianyu 
Published: March 2024

Abstract
In this study, mine wastewater from Leiyang, Hunan Province was taken as the research object to investigate the effect of using the method of self-hydrolytic submerged sedimentation to treat acid coal mine drainage. It was found in this study that the removal rate of sulfate ions and iron ions from the acidic coal mine drainage stock solution at pH=2.7 was very limited by self-hydrolytic sedimentation experiments relying only on pure vertical sedimentation flow treatment, but the hydrolytic treatment could greatly improve the solution environment and promote the formation of secondary minerals of sulfate ions and iron ions in the acidic coal mine drainage, which greatly improved the removal rate of iron ions. Both suspended and precipitated materials produced in the self-hydrolysis sedimentation experiments were hydroxylated iron sulfate secondary minerals- Schwertmannite [Fe8O8(OH)8-2X(SO4)X (1 ≤ x ≤ 175)], the formation of which is inextricably linked to the low pH environment and high concentration of sulfate and iron ions in coal mine wastewater. Self-hydrophoretic submerged flow can remove iron ions from acidic coal mine drainage at low cost and high efficiency, and the total iron removal rate of this system can reach 90.93% after 24 h of treatment, which has a favorable comprehensive utilization value.
Study on road performance of asphalt mixture based on POE/PA6 modifier
Authors: Guo Liujie , Pan Zongjun , Liu Changxiaoxi , Yang Yongcai , Sui Yanhe 
Published: March 2024

Abstract
A POE/PA6 modifier with increased reactivity was prepared using the twin-screw extrusion granulation process and added to the asphalt mixture. The effect of the POE/PA6 modifier on high-temperature stability, low-temperature anti-cracking, and water stability of asphalt mixture was studied. The results show that compared with the asphalt mixture mixed with recycled PE, the asphalt mixture mixed with POE/PA6 has nearly four times the rutting resistance of the former at 70°C and 1.0 MPa, the fracture energy and flexibility index are twice the former at -10°C, and the maximum bending strain and water stability are also significantly improved. This modifier shows a good engineering application prospect in highway construction and maintenance under high temperatures and heavy load traffic environments.
Investigating the serve life of common earthed materials based on evaluations of the soil corrosion in offshore areas of East China
Authors: Guo Zhaomin , Shi Qi , Wang Yejiao 
Published: March 2024

Abstract
The serve life of common earthed materials in power systems is essentially affected by the soil environment, especially the potential corrosion problem of sodium chloride contaminated soil in offshore areas. This study measured the corrosion rates of three common earthed metal materials, Q235 carbon steel, pure Al, and H62 brass, in typical chloride saline soil using accelerated and field corrosion tests. The acceleration ratio and kinetic correlation coefficient under different acceleration conditions were calculated, and the laboratory and field corrosion time correlation models of common earthed metal materials were obtained. The results show a good correlation between soil accelerated and field corrosion tests. Under the same temperature and salinity, the correlation degree of Q235 carbon steel is larger when the water content is 30%. In comparison, the correlation degree of pure Al and H62 brass is larger when the water content is 20%. The laboratory and field corrosion time correlation models of Q235 carbon steel, pure Al, and H62 brass in chloride type saline soil environment are T1=18.32T0, T1=95.56T0, T1=15.78T0, which can effectively evaluate the serve life of common earthed metal materials in typical chloride type saline soil in the offshore area of East China.
Influence of modified phosphogypsum content on the properties of HDPE/phosphogypsum composites
Authors: Zhang Daohai , Du Jingyu , Liu Guilan , Pei Meng , Shi Lianjun , Chen Qianlin , Xie Tian 
Published: March 2024

Abstract
Phosphogypsum has received increasing attention for solid waste with high production and environmental pollution. This study treated phosphogypsum with the silane coupling agent 3-(methacryloyloxy) propyltrimethoxysilane (KH570) to create modified HDPE/phosphogypsum composites. The modified phosphogypsum was then melted and blended with high-density polyethylene (HDPE). Thermal weight loss (TG), differential scanning calorimetry (DSC), and rheological and mechanical property testing were used to study the impact of the changed phosphogypsum content on the properties of the composites. The outcomes demonstrate that even at low filling levels, the modified phosphogypsum may be evenly distributed throughout the matrix. Furthermore, the addition of increased phosphogypsum filling enhances the mechanical characteristics of the HDPE matrix.
Effect of intercritical quenching and tempering on microstructure and properties of DP1180
Authors: Zou Zhiwei , Jiang Bowen , Li Liejun , Ren Jianping , Dai Jietao 
Published: March 2024

Abstract
Advanced high-strength steels for automobiles are attracting more and more attention due to the need to conserve energy, reduce emissions, and develop lightweight designs. DP1180 is set to become the mainstay of automotive steel, offering a good combination of strength and plasticity. In this paper, the effect of the quenching temperature on the microstructure and mechanical properties of the DP1180 steel has been studied by means of scanning electron microscopy (SEM) and mechanical tests. The results show that the DP1180 steel had the highest product of strength and plasticity equal to 15.7 GPa·%, quenched at 825°C and tempered at 430°C for 5 minutes, the ultimate tensile strength (UTS) is about 1, 342 MPa, and the total elongation is 11.7%. This study offers a dependable theoretical guideline for the optimization of process parameters for the production of DP1180 steel.
Laser cladding of Ni60/WC composite coatings on Ti6Al4V alloy and its effect on microstructure and properties
Authors: Feng Mingjia 
Published: March 2024

Abstract
Among its strong properties, titanium alloy is corrosion resistant, low density, and performs well at low temperatures. Aerospace, marine, automobile, armored, and biomedical equipment utilize it extensively. Titanium alloy also has some problems when used in some special environments, such as poor wear resistance and inadequate resistance to oxidation. By laser coating titanium alloy with Ni60/WC composite coating, the performance of titanium was better. To investigate impact of processing on cladding layer microstructure and properties, three different energy densities of 33.3 J/mm2, 46.7 J/mm2, and 53.3 J/mm2 were used for experiments. Between substrate coatings, there is strong metallurgical bonding at three laser energy densities. The coating’s microhardness first rises and then falls with increasing energy density. The performance of friction and wear coatings is superior to that of the substrate. Laser energy density at 33.3 J/mm2 has the best wear resistance coating.
Design of a digital twin system for micro-lens array embossing manufacturing
Authors: Yang Zhengjie , Ma Liping , Zhang Jianyong , Dong Wendi , Zhang Qingmeng , Chen Rumeng 
Published: March 2024

Abstract
Micro-lens arrays, due to their unique structure and outstanding optical performance, have been widely applied in advanced domains such as display technology, optical imaging, and laser processing. Among the manufacturing techniques, embossing molding is considered an efficient and precise method for fabricating micro-lens arrays. However, given the intricate structural characteristics of these arrays, precise control over the process becomes paramount. This study introduces a digital twin system for micro-lens array embossing manufacturing, grounded on a process knowledge base. The system relies on the rich process knowledge within the backend database combined with real-time sensor data, providing a powerful drive for the digital twin, thereby ensuring the precision and stability of the embossing manufacturing process. Additionally, the digital twin technology not only offers real-time monitoring and feedback for the production process of the micro-lens arrays but also aids researchers in optimizing process parameters, further enhancing product quality and consistency.
Determination of fan height based on FDM nozzle temperature field analysis—an example of babbitt alloys
Authors: Liu Jianxiu , Zhou Tianchang , Li Yi , Zhang Pengcheng 
Published: March 2024

Abstract
In this paper, the phenomenon of nozzle clogging or drooling droplets in the process of FDM metal 3D printing of tin-based Babbitt alloys was evaluated by simulation to assess the effects of different heights of cooling fans on the printer’s nozzle cooling module, and the optimal height of the fans was determined. Based on the thermal analysis results, a thermodynamic coupling analysis was carried out to analyze the thermodynamic changes of the nozzle at a given temperature. Finally, the printing trials of tin-based Babbitt alloy were carried out using self-developed forming equipment to verify the accuracy of the theory. The results show that the print quality can be effectively improved by controlling the heat dissipation module of the printer nozzle. The printed material exhibited a uniform and fine microstructure in the 3D printing trials of tin-based Babbitt alloy.
Modeling of jet spreading and flame hazard distances for high pressure hydrogen releases
Authors: Guo Fumin , Song Chunyan , Ba Qingxin , Zhang Jiaxin , He Zhonglong , Li Xuefang 
Published: March 2024

Abstract
Hydrogen is a promising clean and sustainable energy carrier. Hydrogen is usually stored at high pressure due to its low density. Hydrogen releases from high pressure storage can result in underexpanded jets that will mix with air, forming a large combustible cloud. If the jets are ignited, jet flames will form with a large hazard area. This study simulated hydrogen jets and jet flames for storage pressures of 1~70 MPa and nozzle diameters of 1~2 mm using the HyRAM software. The results show that the jet diffusion distance increased with the hydrogen stagnation pressure and the nozzle diameter. The diffusion distances were correlated with the nozzle diameter and the hydrogen stagnation pressure. The jet flames and thermal radiations were then analyzed to show that the flame length and hazard distance both increased with the stagnation pressure and nozzle diameter. Correlations for radiation major harm distance, harm distance and no harm distance were developed to predict the jet flame hazard range. The present study can provide references for the safety design of hydrogen applications.
Cold start of proton exchange membrane fuel cell using build-in catalytic heater
Authors: Ivanova N A , Baranov I E , Kalinnikov A A , Mensharapov R M , Spasov D D , Sinyakov M V , Nikolaev I I , Ostrovsky S V , Grigoriev S A , Fateev V N 
Published: March 2024

Abstract
The paper report on the cold start of fuel cell with proton exchange membrane (PEMFC) at – 40 °C using a catalytic heating unit integrated directly into the PEMFC bipolar plates. This technical solution increases the heat transfer efficiency up to 60% due to direct contact of the membrane-electrode assembly with the heating unit, and ensure a successful cold start of the fuel cell from – 40 °C to an operating temperature of 35 °C within 6 minutes at air flow rate of 150 mL/min. The hydrogen flow rate is 45 cm3/s, which corresponds to a hydrogen concentration in the air flow of ca. 1.8 vol.%, which is below the autoignition point and ensures the safety of the proposed method. Uniform distribution of heat over the bipolar plates surface prevents dehydration and thermal degradation of the membrane electrode assembly components and improve the PEMFC performance after cold start.