bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the drop strength of coal powder in hot air dense medium fluidized bed
Authors: Li Lingyue 
Published: August 2021

Abstract
In this paper, the drop strength of pulverized coal in a hot air dense medium fluidized bed was studied, and the influence of factors such as coal surface moisture, drying temperature, drying time, air volume and other factors on the drop strength were investigated, and the mathematical correlation of the drop strength was established; it shows that with the increase of drying time, the fall intensity of coal decreases; as the drying temperature rises, the fall intensity decreases; as the surface moisture of coal increases, the coal fall intensity decreases; as the air volume increases, the coal fall intensity decreases.
Effects of Box-Behnken on decomposition rate of fungal lignocellulosic
Authors: Zhou Xinyi , Li Qingxin , Hong Cheng 
Published: August 2021

Abstract
In this paper, Box-Behnken response face model was used to establish the decomposition rate model of fungi. Based on the single factor simulation test data in the literature, this paper uses the Design-Expert 8, aiming at the peripheral range value of single factor optimization results, the orthogonal rotation combination experiment of multiple factors was designed to obtain the response surface regression model of fungi decomposition rate and temperature, time, quantity, population proportion and other factors, and to solve the optimal parameter combination; on the other hand, according to the research data of the title, taking the humidity tolerance as the link, the relationship function of fungi decomposition rate and growth rate, humidity tolerance was established by using MATLAB. Combining the two models, the decomposition rate model under the interaction of multiple fungi was established. The main factors affecting the decomposition rate of fungi were found from different angles by two methods, and different fungi were organically combined by growth rate and moisture resistance.
Study on the process of simultaneous desalting and boron removal from seawater
Authors: Kuang Bin , Li Zhensheng , Lin Ziyang , Du Siyuan , Guo Bing , Wang Tao 
Published: August 2021

Abstract
Two new combined technologies, reverse osmosis (RO) + electrodeionization (EDI) and reverse osmosis (RO) + ion exchange (IE), were studied for simultaneous desalination and boron removal of seawater. The results show that the RO system has excellent desalination performance under the experimental conditions, and can provide stable desalination rate for the subsequent processes of the two combined schemes. The boron concentration in water has little effect on the desalination rate of RO system, and the boron removal rate of RO system is between 47% and 50%, which provides a good early treatment for the subsequent process. The blank experiment shows that the salinity has little effect on the boron removal rate of RO-EDI equipment, and the boron removal rate is more than 93%, which has excellent and stable boron removal performance, but the water yield of RO-EDI equipment is low (less than 60%). The RO-IE system has a high water yield (> 70%), but the equipment has poor adaptability to influent boron concentration and salinity. The results of effluent water show that the boron concentration of raw water by RO-EDI combined process can be adapted to a wider range, and the influence of salinity is less. Considering comprehensively, RO-EDI process has more advantages and broad application prospects.
Discussion on the temperature influence of Pb/Cu/Ni/Mo precipitation in copper faucets
Authors: Tingting Huang , Renjie Chen , Wenjia Huang , Jiannan Wang , Liping Guo , Meimei Xie , Jinzhang Cai 
Published: August 2021

Abstract
Precipitation of harmful substances in the faucets has always been the focus of attention, this experiment selected the four metal elements of Pb/Cu/Ni/Mo as the research object, and studied the precipitation in the faucets which were extracted at the ambient temperature of 20°C, 40°C and 60°C. The results showed that the Pb and Mo precipitation in the faucets increased with the temperature rise, while the Cu and Ni in most samples were the least precipitated at 60°C. Detection found that the metals precipitation among different batches and different samples in the same batch varied widely, mainly affected by the processing technology and the material of faucets.
Synthesis of ZIF-69-derived Electrocatalyst with Low loading Platinum for Oxygen Reduction Reaction
Authors: Liu Xiaoyu 
Published: August 2021

Abstract
Here, we report a facile preparation of a low-platinum catalyst derived from ZIF-69 denoted as Pt@ZC-69. Nitrogen-abundant ZIF-69 could act as a support to efficiently encapsulate trimethyl (methylcyclopentadienyl) platinum (IV) (MeCpPtMe3@ZIF-69) precursor. After high-temperature reduction, Pt@ZC-69 with uniform Pt-loading was obtained. In the acidic medium, the Pt@ZC-69 presented a desirable performance, the half-wave potential could reach 0.845 V vs. RHE, while the Pt content is less than 10% of the commercial 20 wt.% Pt/C. Moreover, Pt@ZC-69 also possessed robust stability (40 mV decays after 20000 cycles).
Effect of ethanol extract from chestnut flower on nitrite content in pickles
Authors: Siyu Shi , Haibin Li , Yu Hao , Wenhui Liang , Fang Wang , Meixia Pang , Jinghua Qi 
Published: August 2021

Abstract
In this paper, chestnut flowers from the Huairou District of Beijing were used as experimental materials. It was aimed to explore the removal effect of nitrite by ethanol extract simulation system of chestnut flower and its impact on nitrite in food. The content of nitrite was measured by the naphthalene ethylenediamine hydrochloride method. In the experiment, the ethanol extract of chestnut flower was added when pickling vegetables. During pickling, adding the ethanol extract of chestnut flower could decrease the content of nitrite. As a consequence, the peak of nitrite was delayed one day due to the addition of 0.2 g/mL ethanol extracting from the chestnut flower.
Light and Thermal Induced Spin Crossover Properties of Fe(II) Compound
Authors: Zhao Qi 
Published: August 2021

Abstract
We synthesized a novel phenanthroline-based mononuclear Fe(II) compound [Fe(TTD)2(NCS)2]⋅CH3CN (1, TTD = 1,4,8,9-tetraaza-triphenylene-2,3-dicarbonitrile). And its crystal structure, optical and magnetic properties were analyzed. The thermally induced SCO of the compound is a one-step abrupt transition. In addition, light can also control the spin state of the compound. By using 660 nm light-excited compound, LIESST (light-induced excited spin-state trapping) effect can be achieved.
Effects of Intercropping on the Chemical Forms of Pb and Cd in Cyperus glomeralus and Zea mays.
Authors: Wang Jun , Zhao Mimi , Lei Mengmeng , Qin Li 
Published: August 2021

Abstract
Pot experiment was carried out to study the chemical form of Pb and Cd in two plants under the condition of Cyperus glomeratus and Zea mays intercropping. The results showed that: (1) The chemical form of Pb in two plants are mainly FNaCl and FR. Compared with monoculture, Pb content of various chemical forms in C. glomeratus increased by 5.88%~300% under intercropping, and decreased by 5.69%~47.69% in Z. mays. (2) The chemical form of Cd in both plants are FNaCl and FHCl, the FR Cd contents in the shoot of C. glomeratus increased by 21.45% and the FW, FHCl and FR Cd contents increased by 12.06%~33.33% under intercropping system; the FHCl Cd contents in the shoot of Z. mays decreased by 21.84% and the FW, FNaCl, FHAC and FR Cd contents in the root of Z. mays decreased by 12.96%~61.03% under intercropping system comparing with monoculture system. It is shown that intercropping of C. glomeralus and Z. mays affects the chemical form of Cd and Pb in plants, promoting the absorption and accumulation of Pb and Cd in C. glomeralus, and inhibiting the accumulation of in Z. mays.
Preliminary Study on Application of Infrared Thermal Imaging Technology in Combustion Control of Coal-fired Boilers
Authors: Zhang Zi-Guo 
Published: August 2021

Abstract
The principle of infrared thermal imaging is briefly described. According to the actual situation of the boiler and the investment cost, the location and quantity of the infrared cameras are analyzed, it is reasonable to set up an infrared camera on both sides of the end of the boiler grate for combustion monitoring. In addition, the thermal image of coal combustion in the boiler furnace monitored by the infrared cameras are analyzed and researched. It is concluded that the infrared thermal imaging technology can be applied to the combustion monitoring of coal-fired boilers, which is beneficial to saving coal, energy saving and environmental protection.
The influence of alkalinity on the two stages of S0-based autotrophic denitrification
Authors: Li Yong , Zhang Xiaolei , Li Ji 
Published: August 2021

Abstract
In this study, two S0 particle packed reactors were constructed to explore the influence of alkalinity content on S0-based autotrophic denitrification (SAD) with nitrate and nitrite as electron acceptors respectively. As a result of the comparative experiment, when the alkalinity of influent is sufficient (HCO3
-: NO3
- mole ratio > 1.5:1), NO3
--N and NO2
--N reactor both showed high removal efficiency. But when the HCO3
-: NO3
- mole ratio decreased to 0.2:1, the average removal rate of NO3
--N decreased to 31%, and NO2
--N average removal rate still maintained at 95%. Based on the results, the reduction of alkalinity can significantly reduce the nitrate removal efficiency, but has little effect on the nitrite removal efficiency. This study further explained the characteristics of alkalinity consumption of the two stage of SAD and may provide a reference for future research.
Influence of temperature on ethylene octene-1 copolymerization catalyzed by supported metallocene catalyst
Authors: Dengfei Wang , Jian Wang , Shuyan He , Yibin Yan , Guoxing Yang , Xinglong Zhao , Feng Guo 
Published: August 2021

Abstract
A supported (nBuCp)2ZrCl2 metallocene catalyst was prepared and used in the slurry copolymerization of ethylene/octene-1 with triethylaluminium (TEAL) as co-catalyst. The effects of polymerization temperature on the properties of both the catalyst and resulted copolymers were investigated. The results show that the yield of supported metallocene catalyst reaches 4.3 kgPE/gcat and the bulk density of PE is higher than 0.4 g/cm3, the fines content of the polymer is less than 12.0 wt%, and the molecular weight distribution (MWD) of products ranges from 2.9 to 4.0 within the polymerization temperature range of 73~88 °C. These results are beneficial for large-scale industrialization of supported metallocene catalysts, and also provide a reference for academic research.
Preparation of Graphene and its application in lithium batteries
Authors: Ma Zhikun 
Published: August 2021

Abstract
The dual-carbon nanomaterial graphene has attracted the attention of scientific researchers all over the world because of its excellent properties and structure. Among them, graphene as anode material for lithium battery is a hot topic. In this study, the properties of graphene, the preparation method of graphene, the application prospect of modern graphene and the existing preparation methods are discussed.
Research on Technological Development Status of New Energy Vehicles Based on Hydrogen Fuel Cells
Authors: Sining Ma , Peigen Shen 
Published: August 2021

Abstract
As an electric energy conversion medium with economic value, hydrogen energy, which is storable and highly adapted to new energy, can be used as an energy storage medium to ensure the stable output of energy and the continuous running of vehicles in the context of the continuous deterioration of the global environment and the constant decline of the total amount of traditional fossil fuels. This paper summarized the development status of hydrogen fuel vehicles and development characteristics of corresponding technologies, and studied the technological development status of hydrogen fuel cell vehicles (HFCEVs) through the analysis of hydrogen energy for vehicles and through summaries of the development of hydrogen fuel vehicles and key technologies of hydrogen fuel cells.
Energy Consumption Model for pulse-laser Selective Laser Melting
Authors: Hui Jizhuang , Huang Jian , Yan Zhiqiang , Zhang Hao 
Published: August 2021

Abstract
As a widely used additive manufacturing (AM) technology, the selective laser melting (SLM) technology shows great potential for the sustainable development. Therefore, it is essential to conduct an accurate prediction of the AM energy consumption. In this paper, a new prediction method of SLM energy consumption is proposed. Through analysing the working states of each machine subsystem, this method established an energy consumption prediction model concerning the exposure time, point distance, laser power, and hatch spacing based on the characteristics of the pulse-laser-SLM machine. The model contributes to the improvement and optimization of the energy consumption prediction accuracy in the printing stage.
The design and forming of composite heteromorphic components
Authors: ming JIANG , shicheng LI , tao SHEN , chun ZHUANG , bin DONG , jie TIAN 
Published: August 2021

Abstract
In order to meet the weight reduction requirement of a tactical component, feasibility analysis by selected raw material, analyzing the stress and displacement under the working condition by finite element analysis method, a design of molding and curing are proposed. The results of feasibility by choosing suitable show that the mass of the composite component is reduced from 8.3Kg to 2.9Kg after optimization with the theoretical weight loss is 60%; the maximum stress is 50.9 MPa and the maximum displacement is 0.089mm; which meet the design requirement. The internal expansion pressure of the mold is designed as 1.0 MPa which meets the molding requirement. The design of this lightweight tactical composite component is clear, reasonable and feasible, which will have a certain guiding significance for the research of molding technology in related field.
Glypican-3 electrochemical aptasensor based on CuO-rGO nanocomposite
Authors: Feng Huafu , Bao Mingming , Lian Mei , Li Guiyin 
Published: August 2021

Abstract
Herein, a novel electrochemical immunosensor was fabricated based on copper oxide-reduction graphene oxide (CuO-rGO) nanocomposites for Glypican-3 (GPC3) detection. Firstly, CuO-rGO nanocomposite as nanoenzyme with good peroxidase-like properties is synthesized by One-step hydrothermal. Then CuO-rGO nanoenzyme captures GPC3 aptamer to form a signal probe, finally GPC3 antibody is used as the recognition probe to form an "antibody-antigen-aptamer" sandwich structure. Due to the peroxidase-like properties of the probe, this sandwich structure can effectively catalyze the reaction between hydrogen peroxide (H2O2) and silver nitrate (AgNO3) and AgNPs is deposited on the surface of the electrode to amplify the final measured current. The Differential Pulse Voltammetry (DPV) method was employed to record the response signal of the immunosensor. The current response presented a linear relationship to the GPC3 concentration in the range of 1 to 40 μg/mL with the detection limit of 0.45 μg/mL.
Research on Monitoring Method of Fuel Sulfur Content of Ships in Tianjin Port
Authors: Songbo Qi , Jiguang Wang , Xiaowen Zhang , Zhiwen Yang , Zhenkai Xie , Jingyuan Li 
Published: August 2021

Abstract
Fuel sulfur content of marine sailing within the emission control area should not exceed 0.5%. Traditional boarding inspections are difficult, inefficient, and poorly targeted. Remote monitoring of air pollutants from ships is required to screen unqualified ships. The article investigates the topographical conditions and weather conditions of Tianjin Port, selects the technology of existing monitoring methods, elaborates and analyzes the composition and working principle of the current monitoring system, and finally forms a monitoring method of fuel sulfur content of ships in Tianjin Port.
Preparation of Porous Carbon Nanorods by Cellulose Template Method and Their Supercapacitor Properties
Authors: Yu Wei , Jingxun Zhang , Jiatong Wang , Mengyuan Liu , Lu Sun 
Published: August 2021

Abstract
Aiming at the properties of carbon materials, this article synthesized porous carbon nanorod materials by cellulose template method and characterized them by various analysis methods. The results show that these porous carbon nanorod materials have unique morphology and excellent electrochemical performance. It can be seen that these porous carbon nanorod materials have potential application value in capacitors.
Effect of excess air coefficient on the combustion characteristics of a multi-stage dual swirl burner
Authors: Fan Huanbao , Feng Junxiao , Hu Wenhao , Li Weidong , Gao Jun 
Published: August 2021

Abstract
This study proposed a multi-stage dual swirl burner for heating furnaces to achieve low nitrogen oxide (NOx) emissions based on swirling combustion and staging combustion technology. The effect of excess air coefficient on combustion characteristics and NOx emissions was studied by numerical simulation. The flow field, temperature field, oxygen concentration, and the NOx concentration distributions of the burner were discussed and analysed in detail. The simulated results showed that two recirculation zones for entrained flue gas formed in the reaction process by swirl blades. Meanwhile, increasing the excess air coefficient can improve the fuel/air mixing rate and diffusion effect in the combustion chamber, reducing the maximum combustion temperature and NOx emissions. Furthermore, when the excess air coefficient increased from 1.1 to 1.4, the maximum flame temperature was reduced from 1918.3 K to 1819.6 K, and the mole fraction of NOx at the outlet decreased from 1.67×10-6 to 0.77×10-6, which revealed the potential of the burner for the clean combustion.
Lithiophilic coating layer modify three-dimensional Cu foam for stable and dendrite-free lithium metal anode
Authors: Huang Kai , Song Shipai , Xiang Yong 
Published: August 2021

Abstract
The widespread research for lithium metal anodes (LMA) has been rapidly developed in recent years. However, undesirable dendritic structures generated in the process of unstable lithium (Li) deposition dramatically restricts the cycle life of LMA. The skeleton structure of the three-dimensional (3D) host substrates are the potential promising host for Li, which can alleviate volume expansion during cycling. Herein, we propose a facile surface modification approach through ion sputtering, which can effectively regulate the lithiophilic properties of Cu foam (CF) for facilitating Li deposition. Au modified surface can enhance the lithiophilic property of substrates and induce uniform Li deposition along the conductive skeleton. Further analysis of results, substrate with Au coating modified surface exhibits a smaller Li nucleation overpotential (12 mV), a more stable coulombic efficiency (CE) at different current densities, and more uniform morphology of Li deposition with dendrite-free at large capacity of 4 mAh cm-2. Meanwhile, symmetric cells with Au coating on CF can stably operate more lifespan than other samples. Furthermore, full cells paired with LiFePO4 cathodes and CF coated Au exhibit remarkable discharge capacities and capacity retention than others. This work provides new insights toward developing excellent 3D skeleton with modified surface for dendrite-free LMA.
Experimental Study on Surface Electric Field Distribution and Flash-over Voltage of Bushing Composite Insulator at High Altitude
Authors: Shiling Zhang , Xin Liang , Hua Yin 
Published: August 2021

Abstract
At present, the high voltage bushing composite insulator is widely used in AC/DC system substation, and its structural parameters show the nonlinear growth trend with the increase of voltage level. Therefore, in 1000kV UHVAC and 800kV UHVDC system, bushing composite insulator has the typical characteristics of long insulation distance and large radial diameter. At present, with the proposal of high-voltage power equipment compact optimization design scheme, the radial diameter of the composite insulator for bushing can be effectively reduced by reasonable design of internal capacitor core or metal shield structure optimization design scheme, so as to realize its large aspect ratio compact design. On the other hand, the insulation distance of high voltage bushing composite insulator will be further increased when it is applied in high altitude area. The innovation of this paper is how to carry out flashover voltage test to fill the current test data gap. In view of this, this paper first establishes two typical structures of the high voltage bushing composite insulators, including the three-dimensional finite element models of the composite insulators for capacitive core converter transformer bushing and the double-layer metal shield through the wall bushing, obtains the distribution characteristics of typical voltage and electric field under the operating state, and analyzes the local high field strength and corona, the electric field distribution of composite insulators for bushing. Furthermore, the actual flashover tests between large fittings air metal grounding body and large fittings composite insulator metal grounding body are carried out in the laboratory environment, and the quantitative relationship curve between flashover voltage and space net distance is obtained. Based on the above theoretical analysis and test data, the size altitude correction and umbrella skirt contour topology optimization of composite insulator for the UHV AC/DC bushing are carried out. Finally, the DC withstand voltage test and one minute power frequency withstand voltage test are passed, which proves the rationality and effectiveness of the design of composite insulator for bushing at UHV level. In this paper, starting from the typical electric field distribution characteristics of all kinds of composite insulators for bushing, the flashover law is studied for the first time, and the flashover test is carried out in the laboratory to supplement the classical test data. The research results have good theoretical and practical significance for installation, design and operation maintenance of all kinds of composite insulators.