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基于人工智能的英语口语学习模式研究

湖北第二师范学院学报 2024年第8期41卷 94-98页

作者：高茂云刘茹斐武汉警官职业学院基础课部英语教研室武汉430070 武汉理工大学外语学院武汉430070

目前人工智能发展态势良好,人工智能时代的英语教学也与时俱进。现有的英语教学系统主要聚焦在听力、阅读和写作等方面。英语口语的学习模式也应该利用人工智能技术进行技术革新。将人工智能技术运用于英语口语学习中能更好地凸显学习... 详细信息

目前人工智能发展态势良好,人工智能时代的英语教学也与时俱进。现有的英语教学系统主要聚焦在听力、阅读和写作等方面。英语口语的学习模式也应该利用人工智能技术进行技术革新。将人工智能技术运用于英语口语学习中能更好地凸显学习者的主体角色,并通过构建虚拟学习环境推动口语学习向数字化与智能化转型。本文旨在探讨在人工智能快速发展的背景下,英语口语学习的实践路径,总结了英语口语学习中的人工智能技术,提出了英语口语学习框架,研究了英语口语的学习模式,以期为人工智能时代英语口语学习提供一些启示和建议。

关键词：人工智能英语口语学习模式

Resource utilization of flue gas calcium-based desulfurization ash:a comprehensive review

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Journal of Iron and Steel Research International 2023年第3期30卷 405-418页

作者： Dong-xiang Meng ru-fei Wei fei-hu Zhang Hong-ming Long Yuan-yuan Zhou School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resources Recycling Ministry of EducationAnhui University of TechnologyMa’anshan 243032China Industrial Development Research Center China Metallurgical Industry Planning and Research InstituteBeijing 100013China

Calcium-based desulfurization ash(CDA)is mainly produced in dry and semi-dry flue gas desulfurization *** property of CDA is extremely unstable because its main component,calcium sulfite,makes it difficult to be directly applied to the field of building *** modification of desulfurization ash can be realized by high-temperature oxidation and wet *** modification,CDA can be widely used in building *** oxidation has broad development prospects because it can complete the oxidation of CDA and the removal of impurity elements at the same *** can be used to prepare high value-added products of calcium sulfate whiskers and ecological rubber fillers.

关键词： Calcium-based desulfurization ash Oxidation modification Building material Calcium sulfate whisker Flue gas desulfurization

Influence of intermediate annealing on the microstructure and texture of Ni-9.3at%W substrates

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International Journal of Minerals,Metallurgy and Materials 2014年第2期21卷 162-168页

作者： Jia-nan Liu Wei Liu Guo-yi Tang ru-fei Zhu Advanced Materials Institute and Cleaner Production Key Laboratory Graduate School at Shenzhen Tsinghua University Key Laboratory of Advanced Materials Department of Materials Science and Engineering Tsinghua University

The effects of intermediate annealing （IA） on the microstructure and texture of Ni-9.3at%W substrates have been investigated by using electron backscattering diffraction and X-ray diffraction. Results suggest that IA can optimize the homogeneity of deformation micro-structure. Higher IA temperatures （without undergoing recrystallization during IA） will increase the copper-type components of deformation texture and improve the content of cube texture after recrystallization. Sharp cube texture （97.2%） can be obtained at the optimum IA tem-perature of 650°C. The mechanism underlying the transition of deformation texture can be interpreted as that IA increases the dislocation slipping ability and suppresses the twinning deformation of Copper orientation in the subsequent rolling process. The observed strengthening of cube texture as a result of IA treatment is presumably attributed to the reduction of noncube nucleation and the optimization of preferential growth surrounding the cube nuclei.

关键词： nickel tungsten alloys annealing textures rolling

Low-temperature oxidation behavior and mechanism of semi-dry desulfurization ash from iron ore sintering flue gas

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Journal of Iron and Steel Research International 2021年第9期28卷 1075-1081页

作者： Yi-fan Wang Yu-dong Zhang Hong-ming Long Li-xin Qian Yun-fei Luo ru-fei Wei School of Metallurgical Engineering Anhui University of TechnologyMa'anshan 243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resources Recycling(Anhui University of Technology) Ministry of EducationMa'anshan 243002AnhuiChina

The low-temperature wet oxidation behavior of semi-dry desulfurization ash from iron ore sintering flue gas in ammonium citrate solution was investigated for efficiently utilizing the low-quality desulfurization ash. The effects of the ammonium citrate concentration, oxidation temperature, solid/liquid ratio, and oxidation time on the wet oxidation behavior of desulfurization ash were studied. Simultaneously, the oxidation mechanism of desulfurization ash was revealed by means of X-ray diffraction, Zeta electric resistance, and X-ray photoelectron spectroscopy (XPS) analysis. Under the optimal conditions with ammonium citrate, the oxidation ratio of CaSO_(3) was up to the maximum value (98.49%), while that of CaSO_(3) was only 8.92% without ammonium citrate. Zeta electric resistance and XPS results indicate that the dissolution process of CaSO_(3) could be significantly promoted by complexation derived from the ammonium citrate hydrolysis. As a result, the oxidation process of CaSO_(3) was transformed from particle oxidation to SO_(3)^(2−) ion oxidation, realizing the rapid transformation of desulfurization ash from CaSO_(3) to CaSO_(4) at low temperature. It provides a reference for the application of semi-dry desulfurization ash and contributes to sustainable management for semi-dry desulfurization ash.

关键词： Semi-dry desulfurization ash Ammonium citrate Calcium sulfite Calcium sulfate Wet oxidation Sintering flue gas Low-temperature oxidation

SiO_(2)增强自敏性氮化碳微球可见光降解盐酸四环素的研究

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无机材料学报 2024年第7期39卷 787-792页

作者：曹青青陈翔宇吴健豪王筱卓王乙炫王禹涵李春颜茹菲李兰陈智中国计量大学材料化学学院杭州310018

光催化技术在水中新型污染物的治理中应用广泛。自敏性氮化碳(SSCN)是一种新型非金属光催化剂,其表面的自敏性高分子可以有效地拓宽可见光吸收范围,但该材料存在严重的团聚现象,抑制了其光催化活性和稳定性。SiO_(2)的分散性好,被广泛... 详细信息

光催化技术在水中新型污染物的治理中应用广泛。自敏性氮化碳(SSCN)是一种新型非金属光催化剂,其表面的自敏性高分子可以有效地拓宽可见光吸收范围,但该材料存在严重的团聚现象,抑制了其光催化活性和稳定性。SiO_(2)的分散性好,被广泛用作载体构建复合结构应用于光催化领域。本研究首先用Stöber法制备了SiO_(2)微球,随后利用水热法原位合成了SiO_(2)/SSCN复合材料。采用多种表征手段分析样品的物相结构、微观形貌、光电性能。制备的复合材料在光催化降解水中盐酸四环素中表现出增强的降解活性,其活性与SiO_(2)加入量密切相关,当SiO_(2)与SSCN的质量比为0.04∶1时,复合材料的光催化活性和稳定性最佳,光照60 min可降解42%的盐酸四环素,经5次循环后其光催化降解效率仍然能够维持约38%。引入的SiO_(2)为SSCN提供了分散位点,改善了SSCN较为严重的团聚现象,使SSCN表面的1,3,5-三嗪基低聚物(TBO)快速分解后达到表面活性位点暴露的最佳含量,提升了SSCN对可见光的利用率,促进了光生电荷的分离效率,从而有效地提升了SSCN的光催化活性及稳定性。本研究为提高催化剂的光催化活性和稳定性及治理新型污染物提供了一个新思路。

关键词：自敏性氮化碳二氧化硅光催化盐酸四环素活性增强

Staged reaction kinetics and characteristics of iron oxide direct reduction by carbon

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International Journal of Minerals,Metallurgy and Materials 2015年第10期22卷 1025-1032页

作者： ru-fei Wei Da-qiang Cang Ling-ling Zhang Yuan-yuan Bai School of Metallurgical and Ecological Engineering University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Civil and Environmental Engineering University of Science and Technology Beijing Key Laboratory of Electromagnetic Processing of Materials of the Ministry of Education Northeastern University

Staged reduction kinetics and characteristics of iron oxide direct reduction by carbon were studied in this work. The characteristics were investigated by simultaneous thermogravimetric analysis, X-ray diffraction（XRD）, and quadrupole mass spectrometry. The kinetics parameters of the reduction stages were obtained by isoconversional（model-free） methods. Three stages in the reduction are Fe2O3→Fe3O4, Fe3O4→Fe O, and Fe O→Fe, which start at 912 K, 1255 K, and 1397 K, respectively. The CO content in the evolved gas is lower than the CO2content in the Fe2O3→Fe3O4stage but is substantially greater than the CO2 contents in the Fe3O4→Fe O and Fe O→Fe stages, where gasification starts at approximately 1205 K. The activation energy（E） of the three stages are 126–309 k J/mol, 628 k J/mol, and 648 k J/mol, respectively. The restrictive step of the total reduction is Fe O→Fe. If the rate of the total reduction is to be improved, the rate of the Fe O→Fe reduction should be improved first. The activation energy of the first stage is much lower than those of the latter two stages because of carbon gasification. Carbon gasification and FexOy reduction by CO, which are the restrictive step in the last two stages, require further study.

关键词： iron oxides direct reduction reduction kinetics re

Novel method for improving iron recovery from electric arc furnace slag: on-site hot modification

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Journal of Iron and Steel Research International 2022年第8期29卷 1224-1235页

作者： Xiang Lu Xiao-li Huang ru-fei Wei Wen Chen Da-qiang Cang fei-hua Yang Chun-lei Pu Changsha Research Institute of Mining&Metallurgy Co. Ltd.Changsha 410012HunanChina School of Metallurgy and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Technological Institute of Development and Strategy Studies Panzhihua 617000SichuanChina School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243000AnhuiChina State Key Laboratory of Solid Waste Reuse for Building Materials(SKL-SWR) Beijing Building Materials Academy of Sciences Research(BBMA)Beijing 100083China Iron and Steel Technology Research Institute HUATIAN Engineering&Technology CorporationMCCNanjing 210019JiangsuChina

The iron element in electric arc furnace(EAF)slag is extremely difficult to recycle due to the low specific magnetic susceptibility of the RO phase(a solid solution of FeO,MgO,CaO,and MnO).Landfilling EAF slag is strictly forbidden for environmental consideration because of poisonous Cr^(6+) *** original RO phase could be transformed to a spinel structure,whose specific magnetic susceptibility is much higher than that of other minerals,through hot modification,resulting in significantly increased iron recovery by magnetic *** of spinel crystals encloses chromium,such that iron and chromium could be recovered *** chromium in obtained iron concentrates is considerably useful for stainless steel making rather than polluting the *** a result,recovering iron and chromium is truly beneficial for cleaner *** modification of EAF slag should be conducted at 1500-1600ºC for at least 60 min to guarantee homogeneous liquid *** liquid slag was poured onto an iron mold to obtain modified slag(MS)through air *** was characterized by thermodynamic analysis,X-ray diffraction,and scanning electron microscopy combined with energy-dispersive spectroscopy to correlate the relationship between mineral structures and iron *** iron recovery rate of MS first increased and then decreased with increasing *** was less than 10%when the modifier addition amount was below 12 wt.%,but it increased rapidly as the modifier addition amount increased from 16 to 24 wt.%,mainly due to spinel *** highest iron recovery rate was 81.9%when the modifier amount reached 20 wt.%.Meanwhile,Cr^(6+) was enriched in the spinel phase but was not observed in other *** tests were performed on-site with the modifier ranging from 12 to 18 wt.%because additional heat was not provided during the *** showed that MS with 18 wt.%modifier addition exhibited an iron recovery rate of 61.0%,much h

关键词： EAF slag On-site hot modification Iron recovery Chromium recovery Spinel Industrial test

Transport of nanodimers through chemical microchip

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Communications in Theoretical Physics 2020年第1期72卷 130-134页

作者： Shun Zhan ru-fei Cui Li-Yan Qiao Jiang-Xing Chen Department of Physics Hangzhou Dianzi UniversityHangzhou310018China Department of Physics Zhejiang UniversityHangzhou310018China

We propose a new microfluid chip for transporting micro and nano *** device consists of chemical stripe pathways full of fuel species,which can be realized in experiments by chemical surface reactions that form spatiotemporal patterns.A mesoscopic model is constructed to simulate the transport dynamics of nanodimers passing through the *** is found that the increases of the volume fraction and radius of the dimer both decrease the first reach time although the underlying mechanisms are different:the volume fraction affects the probability of touching and entering the chip while the radius determines the self-propulsion within the *** transport efficiency is influenced by the size of the particles.

关键词： microchip catalytically sphere dimers chemical pathway multiparticle collision dynamics transport

Direct Reduction of High-phosphorus Oolitic Hematite Ore Based on Biomass Pyrolysis

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Journal of Iron and Steel Research International 2016年第9期23卷 874-883页

作者： Dong-bo HUANG Yan-bing ZONG ru-fei WEI Wei GAO Xiao-ming LIU School of Metallurgical and Ecological Engineering University of Science and Technology Beijing School of Civil and Environmental Engineering University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

Direct reduction of high-phosphorus oolitic hematite ore based on biomass pyrolysis gases （CO, H2, and CH4 ）, tar, and char was conducted to investigate the effects of reduction temperature, iron ore-biomass mass ratio, and reduction time on the metallization rate. In addition, the effect of particle size on the dephosphorization and iron recovery rate was studied by magnetic separation. It was determined that the metallization rate of the hematite ore could reach 99.35 % at iron ore-biomass mass ratio of 1 ： 0.6, reduction temperature of 1100℃, and reduction time of 55 min. The metallization rate and the aggregation degree of iron particles increase with the increase of reduction temperature. The particle size of direct reduced iron （DRI） has a great influence on the quality of the iron concentrate during magnetic separation. The separation degree of slag and iron was improved by the addition of 15 mass% sodium carbonate. DRI with iron grade of 89.11%, iron recovery rate of 83.47%, and phosphorus content of 0.28% can be obtained when ore fines with particle size of -10μm account for 78.15%.

关键词： high-phosphorus oolitic hematite ore direct reduction biomass pyrolysis dephosphorization