cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57760/sciencedb.17217
title: Influence of pore structure on thermal stress distribution inside coal particles during primary fragmentation
title: Influence of pore structure on thermal stress distribution inside coal particles during primary fragmentation

description: Thermal stress is an important reason of coal particle primary fragmentation, during which the role of pore structure is ambiguous. Thermal stress induced fragmentation experiments were conducted with low volatile coal/char particles, and the results show that the fragmentation severity enhances with increasing porosity. Various porous thermal stress models were developed with finite element method, and the influences of the pore shape, size, position and porosity on the thermal stress were discussed. The maximum thermal stress inside particle increases with pore curvature, the pore position affects the thermal stress more significantly at the particle center and surface. The expectation of the maximum tensile thermal stress linearly increases with porosity, making the particles with higher porosity easier to fragment, contrary to the conclusion deduced from the devolatilization theory. The obtained results are valuable for the analysis of different thermal processes concerning the thermal stresses of the solid feedstocks.
description: Thermal stress is an important reason of coal particle primary fragmentation, during which the role of pore structure is ambiguous. Thermal stress induced fragmentation experiments were conducted with low volatile coal/char particles, and the results show that the fragmentation severity enhances with increasing porosity. Various porous thermal stress models were developed with finite element method, and the influences of the pore shape, size, position and porosity on the thermal stress were discussed. The maximum thermal stress inside particle increases with pore curvature, the pore position affects the thermal stress more significantly at the particle center and surface. The expectation of the maximum tensile thermal stress linearly increases with porosity, making the particles with higher porosity easier to fragment, contrary to the conclusion deduced from the devolatilization theory. The obtained results are valuable for the analysis of different thermal processes concerning the thermal stresses of the solid feedstocks.
DOI: 10.57760/sciencedb.ai.00008
title: Chinese Ancient Architecture Image Database
title: Chinese Ancient Architecture Image Database

description: The following datasets are currently available for non-commercial use. The datasets have two parts, one part consists of laser scan data and corresponding image data which used to compare the accuracy and completeness with the different reconstruction methods, the other consists of the image collections of the typical ancient architectures in the four Buddhist mountains (Mount Wutai, Mount Emei, Mount Jiuhua, Mount Putuo) and two Taoist mountains (Mount Wudang, Mount Qingcheng).Benchmark DatabaseWe use the Riegl-LMS-Z420i laser scanner to scan the 3 buildings in the Tsinghua University. The scanner’s accuracy is 10mm@50m, and the angular stepwidth is 0.0057degree. The 3 buildings are the old gate, the tsinghua school, and the life science building. You can download the groundtruth data from laser scanner, the image data and the camera projection matrix of each buildings. And you can also obtain the evaluation software which is used to evaluate the difference between your result and the groundtruth in Software section.Ancient Architecture Image DatabaseWe have captured typical ancient architectures in the four Buddhist mountains (Mount Wutai, Mount Emei, Mount Jiuhua, Mount Putuo) and two Taoist mountains (Mount Wudang, Mount Qingcheng). The camera is Canno EOS 5D.
description: The following datasets are currently available for non-commercial use. The datasets have two parts, one part consists of laser scan data and corresponding image data which used to compare the accuracy and completeness with the different reconstruction methods, the other consists of the image collections of the typical ancient architectures in the four Buddhist mountains (Mount Wutai, Mount Emei, Mount Jiuhua, Mount Putuo) and two Taoist mountains (Mount Wudang, Mount Qingcheng).Benchmark DatabaseWe use the Riegl-LMS-Z420i laser scanner to scan the 3 buildings in the Tsinghua University. The scanner’s accuracy is 10mm@50m, and the angular stepwidth is 0.0057degree. The 3 buildings are the old gate, the tsinghua school, and the life science building. You can download the groundtruth data from laser scanner, the image data and the camera projection matrix of each buildings. And you can also obtain the evaluation software which is used to evaluate the difference between your result and the groundtruth in Software section.Ancient Architecture Image DatabaseWe have captured typical ancient architectures in the four Buddhist mountains (Mount Wutai, Mount Emei, Mount Jiuhua, Mount Putuo) and two Taoist mountains (Mount Wudang, Mount Qingcheng). The camera is Canno EOS 5D.
DOI: 10.57760/sciencedb.17218
title: pH-sensitive KHA/CMC-Fe3+@CS hydrogel loading and the drug release properties of riboflavin
title: pH-sensitive KHA/CMC-Fe3+@CS hydrogel loading and the drug release properties of riboflavin

description: To improve drug utilization, reduce the drug administration frequency, increase the release time, and reduce the drug side effects in the human body, we prepared (KHA/CMC-Fe3+)@CS hydrogel spheres using green and natural potassium humate (KHA), carboxymethyl cellulose (CMC), and chitosan (CS) as raw materials and Fe3+ as a crosslinking agent, and loaded them with riboflavin for drug sustained-release study using the drop ball method. The tests with FTIR, SEM, TG, and X-ray diffractometer showed that the coordination among KHA, CMC, and Fe3+ formed a three-dimensional network structure, where CS was encapsulated on the surface of the hydrogel spheres via noncovalent bonding, resulting in good thermal stability. The stability, drug loading, swelling, and in vitro release of the (KHA/CMC-Fe3+)@CS hydrogel spheres were investigated. The results showed that the hydrogel spheres were significantly pH-sensitive, with 11.16 g/g higher swelling in an alkaline environment (pH = 7.4) than that in an acidic environment (pH = 1.2). The swelling and drug release process of the hydrogel spheres were analyzed using mathematical models, concluding that the hydrogel swelling follows Schott second-order swelling kinetics, and the drug release mechanism was Fickian delivery mode.
description: To improve drug utilization, reduce the drug administration frequency, increase the release time, and reduce the drug side effects in the human body, we prepared (KHA/CMC-Fe3+)@CS hydrogel spheres using green and natural potassium humate (KHA), carboxymethyl cellulose (CMC), and chitosan (CS) as raw materials and Fe3+ as a crosslinking agent, and loaded them with riboflavin for drug sustained-release study using the drop ball method. The tests with FTIR, SEM, TG, and X-ray diffractometer showed that the coordination among KHA, CMC, and Fe3+ formed a three-dimensional network structure, where CS was encapsulated on the surface of the hydrogel spheres via noncovalent bonding, resulting in good thermal stability. The stability, drug loading, swelling, and in vitro release of the (KHA/CMC-Fe3+)@CS hydrogel spheres were investigated. The results showed that the hydrogel spheres were significantly pH-sensitive, with 11.16 g/g higher swelling in an alkaline environment (pH = 7.4) than that in an acidic environment (pH = 1.2). The swelling and drug release process of the hydrogel spheres were analyzed using mathematical models, concluding that the hydrogel swelling follows Schott second-order swelling kinetics, and the drug release mechanism was Fickian delivery mode.
DOI: 10.57760/sciencedb.17219
title: Figures for article
title: Figures for article

description: Figures for article "Research on impact resistance of AlSi7Mg uniform and gradient porous structures manufactured by laser powder bed fusion" published on the Materials Science in Additive Manufacturing
description: Figures for article "Research on impact resistance of AlSi7Mg uniform and gradient porous structures manufactured by laser powder bed fusion" published on the Materials Science in Additive Manufacturing
DOI: 10.57760/sciencedb.psych.00365
title: The Beauty of Leaving a Blank Space
title: 留白之美

description: The Role of Uncertainty in Chinese Painting and Its Impact on Aesthetic Experience
description: The Role of Uncertainty in Chinese Painting and Its Impact on Aesthetic Experience
DOI: 10.57760/sciencedb.17224
title: Axial segregation characteristics and size-induced flow behavior of particles in a novel rotary drum with curved sidewalls
title: Axial segregation characteristics and size-induced flow behavior of particles in a novel rotary drum with curved sidewalls

description: Particle mixing and segregation are common phenomena in rotary drums, which are challenging to be controlled and driven artificially in powder technology. In this work, the discrete element method (DEM) was applied to construct the novel rotary drum composed of different shaped curved sidewalls. By varying the operation parameters of particle and sidewall shapes as well as the length-to-diameter (L/D) ratio of drums, the axial mixing and segregation processes of binary size-induced particles were investigated. The results show that the axial flow velocity of the particle mixtures is noticeably weakened once the particle angularity increases, making the non-spherical particles to mix better in rotary drums compared to the spherical particles. Besides, in the short drums with size-induced spherical particles, the axial segregation characteristics are significantly enhanced by the convex sidewalls while suppressed by the concave sidewalls. However, for size-induced non-spherical particles, the axial segregation structure can be present in rotary drums with plane and concave sidewalls while not in drums with convex sidewalls. Moreover, the axial segregation band structure of spherical particles eventually increases proportionally with the increased drum L/D ratios. In contrast, the non-spherical particles cannot form obvious multi-proportional segregation bands.
description: Particle mixing and segregation are common phenomena in rotary drums, which are challenging to be controlled and driven artificially in powder technology. In this work, the discrete element method (DEM) was applied to construct the novel rotary drum composed of different shaped curved sidewalls. By varying the operation parameters of particle and sidewall shapes as well as the length-to-diameter (L/D) ratio of drums, the axial mixing and segregation processes of binary size-induced particles were investigated. The results show that the axial flow velocity of the particle mixtures is noticeably weakened once the particle angularity increases, making the non-spherical particles to mix better in rotary drums compared to the spherical particles. Besides, in the short drums with size-induced spherical particles, the axial segregation characteristics are significantly enhanced by the convex sidewalls while suppressed by the concave sidewalls. However, for size-induced non-spherical particles, the axial segregation structure can be present in rotary drums with plane and concave sidewalls while not in drums with convex sidewalls. Moreover, the axial segregation band structure of spherical particles eventually increases proportionally with the increased drum L/D ratios. In contrast, the non-spherical particles cannot form obvious multi-proportional segregation bands.
DOI: 10.57760/sciencedb.j00125.00045
title: Influence of functionalized graphene on the bacterial and fungal diversity of Vicia faba rhizosphere soil
title: Influence of functionalized graphene on the bacterial and fungal diversity of Vicia faba rhizosphere soil

description: Functionalized graphene addition altered the relative abundance of nitrogen and phosphorus cycling-related microorganisms in soil, enhanced the uptake of nitrogen and phosphorus of V. faba roots, and ultimately improved plant growth.
description: Functionalized graphene addition altered the relative abundance of nitrogen and phosphorus cycling-related microorganisms in soil, enhanced the uptake of nitrogen and phosphorus of V. faba roots, and ultimately improved plant growth.
DOI: 10.57760/sciencedb.17232
title: Influence of crystal-transforming agent on the performance and mechanism of α-high-strength gypsum prepared from FGD gypsum
title: Influence of crystal-transforming agent on the performance and mechanism of α-high-strength gypsum prepared from FGD gypsum

description: This paper investigates the impact of flue gas desulfurization (FGD) gypsum's crystal modifier on the characteristics and microcosmic mechanism of α-high strength gypsum. The results demonstrate that all three crystal modifiers can convert FGD gypsum to α-high-strength gypsum. Citric acid (CA) has the most significant influence on α-high-strength gypsum, and the prepared α-high-strength gypsum is short columnar, with an aspect ratio in the range of 1–3, and has a faster setting time, a larger specific surface area, and a smaller standard consistency, higher compressive strength, greater surface hardness, and smaller crystal particle size. The initial setting time of the α-high-strength gypsum manufactured with CA crystal modifier was decreased by 36% compared to the blank sample, the final setting time was lowered by 37.5%, and the water consumption of the standard consistency was reduced by 8%. The maximum strength is 32 MPa after 2 h, the absolute dry compressive strength is up to 38 MPa, and the surface hardness is improved by 24.43%.
description: This paper investigates the impact of flue gas desulfurization (FGD) gypsum's crystal modifier on the characteristics and microcosmic mechanism of α-high strength gypsum. The results demonstrate that all three crystal modifiers can convert FGD gypsum to α-high-strength gypsum. Citric acid (CA) has the most significant influence on α-high-strength gypsum, and the prepared α-high-strength gypsum is short columnar, with an aspect ratio in the range of 1–3, and has a faster setting time, a larger specific surface area, and a smaller standard consistency, higher compressive strength, greater surface hardness, and smaller crystal particle size. The initial setting time of the α-high-strength gypsum manufactured with CA crystal modifier was decreased by 36% compared to the blank sample, the final setting time was lowered by 37.5%, and the water consumption of the standard consistency was reduced by 8%. The maximum strength is 32 MPa after 2 h, the absolute dry compressive strength is up to 38 MPa, and the surface hardness is improved by 24.43%.
DOI: 10.57760/sciencedb.17235
title: An Efficient Multi-Topology Construction Method for Mobile Data Flows Scheduling in SDN
title: An Efficient Multi-Topology Construction Method for Mobile Data Flows Scheduling in SDN

description: data of the simulation.
description: data of the simulation.
DOI: 10.57760/sciencedb.17234
title: Study on the fast elimination of smoke particle based on electro-acoustic coupling agglomeration technology
title: Study on the fast elimination of smoke particle based on electro-acoustic coupling agglomeration technology

description: Fire smoke, which consists large amounts of fine particles, is considered as the fatal factor in fires. In this study, a fast smoke particle elimination method based on electro-acoustic coupling agglomeration technology is proposed. First, the experimental results show that the electro-acoustic coupling agglomeration has higher smoke elimination efficiency compared to single-field. The smoke transmission is much less than 80% after 30 s of single acoustic or electric field action, while the coupled field reaches 90%. Then, the effects of acoustic frequency, sound pressure level and voltage on the smoke elimination characteristics are discussed. It is found that the optimal acoustic frequency is 1.5 kHz. While as the sound pressure level and voltage increase, the elimination efficiency first increases and then tends to stabilize, the critical values of the sound pressure level and voltage are 135 dB and 7 kV. This indicates that there is an optimal combination of the three variables. Finally, through the theoretical analysis of particle movement and the micro-morphology of agglomerates, the particle agglomeration mechanism under the electro-acoustic coupling is analyzed. This study provides a new idea for the fast elimination of fire smoke particle.
description: Fire smoke, which consists large amounts of fine particles, is considered as the fatal factor in fires. In this study, a fast smoke particle elimination method based on electro-acoustic coupling agglomeration technology is proposed. First, the experimental results show that the electro-acoustic coupling agglomeration has higher smoke elimination efficiency compared to single-field. The smoke transmission is much less than 80% after 30 s of single acoustic or electric field action, while the coupled field reaches 90%. Then, the effects of acoustic frequency, sound pressure level and voltage on the smoke elimination characteristics are discussed. It is found that the optimal acoustic frequency is 1.5 kHz. While as the sound pressure level and voltage increase, the elimination efficiency first increases and then tends to stabilize, the critical values of the sound pressure level and voltage are 135 dB and 7 kV. This indicates that there is an optimal combination of the three variables. Finally, through the theoretical analysis of particle movement and the micro-morphology of agglomerates, the particle agglomeration mechanism under the electro-acoustic coupling is analyzed. This study provides a new idea for the fast elimination of fire smoke particle.
DOI: 10.57760/sciencedb.17239
title: Experimental investigation about the incipient velocity of spherical particles on a hemispherical bed surface
title: Experimental investigation about the incipient velocity of spherical particles on a hemispherical bed surface

description: The sediment particles play a huge role in shaping the bed load transport. In this research, 240 water-tunnel experiments are carried out to investigate the incipient velocity of the observation particles in two particle arrangements. To accurately predict the incipient velocity of the observation particles, the equation is conceived by the rolling instability mechanism. The incipient velocity equations and experimental data are used to analyze the trend of dispersive pressure and the effect of arrangement position on velocity. We find that it is appropriate to choose the coefficient of drag as 0.261 and the coefficient of lift as 0.198 for the incipient velocity equation of spherical particles on the hemispherical bed surface. Furthermore, the dispersive pressure is closely related to the flow state, particle size, and particle arrangement, which leads to the incipient velocity of the observation particle being at a minimum when the interference particle angle is 45°. Finally, the particle spacing and the projected area changed with the arrangements, directly affecting the incipient velocity of the observed particle. The analysis of four aspects for the coefficients, dispersive pressure, different particle spacing, and projected area will facilitate the prediction of particle incipient velocity, especially on hemispherical beds.
description: The sediment particles play a huge role in shaping the bed load transport. In this research, 240 water-tunnel experiments are carried out to investigate the incipient velocity of the observation particles in two particle arrangements. To accurately predict the incipient velocity of the observation particles, the equation is conceived by the rolling instability mechanism. The incipient velocity equations and experimental data are used to analyze the trend of dispersive pressure and the effect of arrangement position on velocity. We find that it is appropriate to choose the coefficient of drag as 0.261 and the coefficient of lift as 0.198 for the incipient velocity equation of spherical particles on the hemispherical bed surface. Furthermore, the dispersive pressure is closely related to the flow state, particle size, and particle arrangement, which leads to the incipient velocity of the observation particle being at a minimum when the interference particle angle is 45°. Finally, the particle spacing and the projected area changed with the arrangements, directly affecting the incipient velocity of the observed particle. The analysis of four aspects for the coefficients, dispersive pressure, different particle spacing, and projected area will facilitate the prediction of particle incipient velocity, especially on hemispherical beds.
DOI: 10.57760/sciencedb.17240
title: Waste to treasure: Reutilization of fluid catalytic cracking coke block as photothermal conversion material for water evaporation
title: Waste to treasure: Reutilization of fluid catalytic cracking coke block as photothermal conversion material for water evaporation

description: This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking (FCC) coke block. Herein, we analyzed the basic characteristics and chemical composition of FCC coke blocks. The results showed that the main components were carbon, oxygen, and aluminum, accounting for 60.8%, 26.6%, and 11.5%, respectively. Under the conventional catalytic cracking reaction temperature from 500 °C to 600 °C, the formation of the first aromatic hydrocarbon was particularly important for the formation of coke. The condensation of oil-gas-entrained catalyst particles and their heavy components was the physical cause of coking, while the dehydrogenation condensation reaction of oil-gas heavy components was the chemical factor. In addition, the membrane prepared by powdered coke had excellent photothermal conversion ability, which could be heated to more than 110 °C within 360 s under two fixed light intensities. The evaporation rate of photothermal water was 5.89 kg m2 h−1, which has great industrial application potential. These works provide a novel and effective method of separation membrane for the reutilization of FCC coke blocks.
description: This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking (FCC) coke block. Herein, we analyzed the basic characteristics and chemical composition of FCC coke blocks. The results showed that the main components were carbon, oxygen, and aluminum, accounting for 60.8%, 26.6%, and 11.5%, respectively. Under the conventional catalytic cracking reaction temperature from 500 °C to 600 °C, the formation of the first aromatic hydrocarbon was particularly important for the formation of coke. The condensation of oil-gas-entrained catalyst particles and their heavy components was the physical cause of coking, while the dehydrogenation condensation reaction of oil-gas heavy components was the chemical factor. In addition, the membrane prepared by powdered coke had excellent photothermal conversion ability, which could be heated to more than 110 °C within 360 s under two fixed light intensities. The evaporation rate of photothermal water was 5.89 kg m2 h−1, which has great industrial application potential. These works provide a novel and effective method of separation membrane for the reutilization of FCC coke blocks.