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Fabrication and characterization of electrospun biocompatible PU/PEGMA hybrid nanofibers by in-situ UV photopolymerization

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Science China(Physics,Mechanics & Astronomy) 2012年第7期55卷 1189-1193页

作者： WANG HeYun FENG YaKai yuan wenjie ZHAO HaiYang FANG ZiChen KHAN Musammir GUO JinTang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering Shihezi UniversityShihezi 832003China Key Laboratory of Systems Bioengineering Ministry of EducationTianjin UniversityTianjin 300072China

Poly（ethylene glycol） methacrylate （PEGMA） was introduced into a polyurethane （PU） solution in order to prepare hemocom- patible electrospun membranes for potential application as small diameter vascular scaffolds. Crosslinked PU/PEGMA hybrid nanofibers were fabricated by a reactive electrospinning process with N,N＇-methylenebisacrylamide （MBAm） as erosslinker and benzophenone （BP） as photoinitiator. The photoinduced polymerization and crosslinking reaction took place simultane- ously during the electrospinning process. No significant difference in the membrane morphology was found by SEM when PEGMA content was less than 20 wt%. The crosslinked fibrous membranes of PU/PEGMA exhibit higher hydro- philicity and mechanical strength than PU membrane. These nanofibrous membranes are potential substitutes for artificial vascular scaffolds.

关键词： electrospinning crosslink photopolymerization polyurethane poly(ethylene glycol) methacrylate.

Effect of Heredity of Raw Materials on Properties of Alumina-magnesia Refractory Castables

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China's Refractories 2016年第4期25卷 10-13页

作者： yuan wenjie CHEN Fan TANG Hai SHANG Heng ZHU Qingyou DENG Chengji ZHU Hongxi The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology

Regarding the morphology of alumina,effect of the heredity of raw materials on properties of aluminamagnesia refractory castables was investigated by adding platelet alumina as the specific ***-situ spinel platelet formed derived from platelet *** comparing phase evolution,apparent porosity,bulk density,permanent linear expansion and strength,it was demonstrated that the utilization of the microstructures＇ heredity of platelet alumina was a new alternative for controlling properties of alumina-magnesia refractory castables.

关键词： alumina template adding apparent porosity refractory permanent spinel calcined titania

A personality-guided affective brain-computer interface for implementation of emotional intelligence in machines

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Frontiers of Information Technology & Electronic Engineering 2022年第8期23卷 1158-1173页

作者： Shaojie LI Wei LI Zejian XING wenjie yuan Xiangyu WEI Xiaowei ZHANG Bin HU School of Information Science and Engineering Lanzhou UniversityLanzhou 730099China

Affective brain-computer interfaces have become an increasingly important topic to achieve emotional intelligence in human–machine ***,due to the complexity of electroencephalogram(EEG)signals and the individual differences in emotional response,it is still a great challenge to design a reliable and effective *** the influence of personality traits on emotional response,it would be helpful to integrate personality information and EEG signals for emotion *** study proposes a personalityguided attention neural network that can use personality information to learn effective EEG representations for emotion ***,we first use a convolutional neural network to extract rich temporal and regional representations of EEG signals,and a special convolution kernel is designed to learn inter-and intra-regional correlations ***,inspired by the fact that electrodes within distinct brain scalp regions play different roles in emotion recognition,a personality-guided regional-attention mechanism is proposed to further explore the contributions of electrodes within a region and between ***,attention-based long short-term memory is designed to explore the temporal dynamics of EEG *** on the AMIGOS dataset,which is a dataset for multimodal research for affect,personality traits,and mood on individuals and groups,show that the proposed method can significantly improve the performance of subject-independent emotion recognition and outperform state-of-the-art methods.

关键词： Electroencephalogram(EEG) Emotion recognition Attention mechanism Personality traits

Effects of SnO<sub>2</sub>Addition on the Properties of Alumina-Magnesia Refractory Castables

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New Journal of Glass and Ceramics 2015年第1期5卷 1-7页

作者： wenjie yuan Qingyou Zhu Chengji Deng Hongxi Zhu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan China

Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO2 additive in 0 - 5 wt% range were investigated. The phase composition, microstructure, physical and mechanical properties of these refractories were studied. The results showed that the addition of SnO2 could have a great influence on the properties of alumina-magnesia refractory castables. The expansion, apparent porosity and strength of refractories with SnO2 were all more prominent than those of reference samples, which were attributed to the formation of CA6 and enhanced bonding. Meanwhile SnO2 could react with spinel and CA6 to form solid solution.

关键词： Castables SnO2 Spinel Calcium Hexaaluminate

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虚拟现实现象学批判纲要

四川大学学报（哲学社会科学版） 2024年第3期 197-203,220页

作者：袁文洁中国人民大学哲学院北京100872

英美哲学和现象学对虚拟现实的哲学分析大多集中于具身性概念上。文章从世界现象学、图像现象学、身体现象学和现象学的主体性概念四个基本层面,全面分析虚拟现实技术的逼真的“现实性”、数字化图像生成的“虚拟性”、虚拟身体的具身... 详细信息

英美哲学和现象学对虚拟现实的哲学分析大多集中于具身性概念上。文章从世界现象学、图像现象学、身体现象学和现象学的主体性概念四个基本层面,全面分析虚拟现实技术的逼真的“现实性”、数字化图像生成的“虚拟性”、虚拟身体的具身性与去具身化以及体验者的主体性自由等四个基本问题,从现象学哲学的视角对虚拟现实技术进行深入分析并提出相应的批判观点,深化学界对虚拟现实的哲学理解。

关键词：虚拟现实世界现象学图像现象学身体现象学主体性

Fractal Analysis of Fracture Surfaces in Refractories

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China's Refractories 2014年第1期23卷 27-31页

作者： yuan wenjie ZHU Qingyou DENG Chengji ZHU Hongxi The State Key Laboratory Breeding Base of Refractories and Ceramics Wuhan University of Science and Technology

Fractal analysis of fracture surfaces in different kinds of refractories including magnesia-carbon and magnesia-chrome refractories was *** fractal dimensions of fracture surfaces for three points bending test were determined by slit island *** results show that the cold modulus of rupture increases with fractal dimension increasing due to the change in fracture mode depending on the bonding mechanism for a certain refractory material.

关键词： refractories fractal fracture surface cold modulus of rupture

Effect of Al Source and Starting Materials Additions on Synthesis of Al_8B_4C_7

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China's Refractories 2013年第3期22卷 18-22页

作者： CUI Peng DENG Chengji ZHU Hongxi yuan wenjie The Key State Laboratory Breeding Base of Refractories and Ceramics Wuhan University of Science and Technology

Hexagon plate-like Al8B4C7 powders were success- fully synthesized using a mixture of diboron trioxide, ac- tivated carbon and aluminum or alumina by a carbotherreal reduction process. The effect of A1 source and start- ing materials additions on synthesis of Al8B4C7 was in- vestigated. The phase composition and microstructure of Al8B4C7 powder were characterized by means of XRD, SEM and EDS. The main phase compositions of the products synthesized Jkom A1, B2O3 and activated carbon are Al8B4C7 and A120C. Al2O3 can replace Al to synthe- size Al8B4C7. AlsB4C7 grains synthesized from Al2O3, B2O3 and activated carbon are hexagon plate-like and have a thickness of 10 tzm and a size of about 100 tzm.

关键词： AlsB4CT diboron trioxide alumina syn-thesis carbothermal reduction

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酸液改性煤样吸附性能及分形特征研究

煤矿安全 2022年第11期53卷 31-35,41页

作者：原文杰中煤平朔发展集团有限公司山西朔州036006

为了探讨酸化技术在煤层增透方面的应用,开展了酸化改性煤样瓦斯吸附性能及微观机理的研究。利用不同p H值的盐酸溶液制备了褐煤和焦煤的改性煤样共10组,分别开展了改性煤样及原煤煤样的工业分析、瓦斯吸附试验和低温氮吸附试验。瓦斯... 详细信息

为了探讨酸化技术在煤层增透方面的应用,开展了酸化改性煤样瓦斯吸附性能及微观机理的研究。利用不同p H值的盐酸溶液制备了褐煤和焦煤的改性煤样共10组,分别开展了改性煤样及原煤煤样的工业分析、瓦斯吸附试验和低温氮吸附试验。瓦斯吸附试验结果表明:酸液改性能改变煤样的吸附性能,当p H值等于3时,改性煤样的吸附性能降低,其它改性煤样的吸附性能较原煤有所增加。分析低温氮吸附试验结果发现:酸液对不同煤阶的煤样作用的孔段不同,褐煤以10~100 nm的小孔为主,焦煤则以2~10 nm的微孔为主,pH值等于3的改性煤样比表面积减小、大于100 nm孔容增大;利用分形理论计算得到各组煤样的分形维数,焦煤微孔与褐煤小孔和中孔分形维数与瓦斯吸附常数a呈正相关;采用合适的酸液对煤进行改性,能改变煤的吸附性能同时增加煤的透气性。

关键词：酸化技术瓦斯吸附低温氮吸附吸附常数分形维数

Effect of Al on Al_4SiC_4-Al_4O_4C Composite Synthesized from Kaolinite Grog

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China's Refractories 2012年第3期21卷 16-19页

作者： DENG Chengji YU Chao ZHU Hongxi KUANG Jianlei yuan wenjie The Key State Laboratory Breeding Base of Refractories and Ceramics Wuhan University of Science and Technology Wuhan 430081 China

The Al4SiC4 - Al4 O4 C composites were synthesized using 1： 6. 5：2.6 of nudar rntio of kaolinite grog powder, carbon black, and aluminum powder as basic formulation, fixing the additions f kaolinite grog powder and carbon black, vauing aluminum powder addition to make its proportion from 2. 6 to 3. 9, 5. 5, 7. 0, 8. 6, and 10. 4, respectively, adding phenolic resin as binder and absolute alcohol as dispersant, m＆ing well, pressing, drying, and firing at 1 700 for 2 h in a corundum tubularfizrnace in flowing argon. The eeffect cf Al addition on phase tvmposition and mierostrture of Al4SiC4 - Al4 O4 C composites wgs investigated by DTA - TG , XRD , and SEM. The results show that：（1 ） in a certain degree, more Al4SiC4 - Al4 O4 C forms with Al powder addition increasing; （2） the formed Al4SiC4 - Al4 O4 C two morphologies, narrwly, sheet atul block, atul their panicle sizes are. 5 - 15 n and 10 -20 p.m , respectively; （3） the A1 powder htition increase ha.s little effect on the grain shape and size of Al4SiC4 - Al4 O4 C：（4） ttw formed Al4O4C mainly distributes on ttw surfctce of the AluSiC4 grains with irregular shape atut partitle size below I p,m, and some of them bond together.

关键词： Al4SiC4 - Al4O4C aluminum kaolinite oxidation resistance