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Synthesis of Organic-Inorganic Hybrid Aluminum Hypophosphite Microspheres Flame Retardant and Its Flame Retardant Research on Thermoplastic polyurethane

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Journal of Wuhan University of Technology(Materials Science) 2024年第1期39卷 221-233页

作者：刘生鹏 XU Zhi ZHANG Xinyuan WEI huan XIONG Yun DING Yigang huanG Wenbo 许莉莉 Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Key Laboratory for Green Chemical Process of Ministry of EducationSchool of Chemical Engineering and PharmacyWuhan Institute of TechnologyWuhan 430205China Hubei Three Gorges Laboratory Yichang 443007China School of Technology Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205China

Aluminum hypophosphite microspheres(AHP) were synthesized by hydrothermal method using NaH2po2·H2O and AlCl3·6H2O as raw materials, and then the AHP microspheres were polymerized by surface polymerization of micro-nanospheres with cyclic cross-linked poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol)(PZS). A new organic-inorganic poly(phosphonitrile)-modified aluminum hypophosphite microspheres(PZS-AHP) were synthesized by encapsulation and applied to flame retardant thermoplastic polyurethane(TPU). The microstructure and chemical composition of the PZS-AHP microsphere were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and X-ray spectroscopy. The thermal stability of PZS-AHP microsphere was explored with thermogravimetric analysis. Thermogravimetric data indicate that the PZS-AHP microspheres have excellent thermal stability. The thermal and flame-retarding properties of the TPU composites were evaluated by thermogravimetric(TG), limited oxygen index tests(LOI), and cone calorimeter test(CCT). The TPU composite achieved vertical burning(UL-94) V-0 grade and LOI value reached 29.2% when 10 wt% PZS-AHP was incorporated. Compared with those of pure TPU, the peak heat release rate(pHRR) and total heat release(THR) of TPU/10%PZS-AHP decreased by 82.2% and 42.5%, respectively. The results of CCT indicated that PZS-AHP microsphere could improve the flame retardancy of TPU composites.

关键词： polyphosphazene thermoplastic polyurethane flame retardancy aluminum hypophosphite surface polymerization

Leaching behavior and microstructure of phosphorus in converter slag

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Journal of Iron and Steel Research(International) 2024年第7期31卷 1646-1660页

作者： Chao-gang Zhou Jin-yue Li Qing-gong Chen Yin-ye Yang Wei Gong Li-qun Ai Shu-huan Wang Bei-yue Ma College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina College of Materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025GuizhouChina School of Materials and Architectural Engineering Guizhou Normal UniversityGuiyang 550025GuizhouChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

Converter slag is a by-product of the steelmaking process and contains a large amount of Ca,Fe,P and other *** the phosphorus in the converter slag can be effectively extracted,the resulting phosphorus can be used as a phosphate *** in converter slag is mainly enriched in 2CaO·SiO_(2)-3CaO·P_(2)O_(5)(C_(2)S-C_(3)P)solid solution and is easily dissolved in ***,acid leaching method was used to dissolve the solid solution to extract phosphorus in converter slag,so as to realize the recycling of phosphorus resources in converter *** leaching behavior of three actual converter slags from different steel mills in acid leaching solutions composed of citric acid,sodium hydroxide,hydrochloric acid and deionized water was studied by X-ray diffraction,scanning electron microscopy combined with energy dispersive spectrometry,Fourier transform infrared spectroscopy and Raman spectroscopy to reveal the change in object image structure as well as SiO_(4) and po_(4) tetrahedron before and after acid *** results show that only a small amount of phosphorus in converter slag with too low basicity is enriched in C_(2)S-C_(3)P solid solution,resulting in poor leaching *** the converter slag has a high basicity,the removal effect of phosphorus is 70.64%-81.88%.In addition,when the basicity of converter slag is roughly the same,the dephosphorization effect of slag with high FeO content is relatively *** acid leaching will cause depolymerization behavior of SiO_(4) and po_(4) tetrahedron,so that the mole fraction of Q0(Si)(asymmetric stretching vibration of Si-O bond in SiO_(4) tetrahedron with bridge oxygen number of 0)and NBO/Si(non-bridging oxygen in silicate tetrahedra)will ***-containing solids can be obtained from the solution after acid leaching through static precipitation,and the solids have the potential to make phosphate fertilizers.

关键词： Dephosphorization converter slag Acid leaching Phosphorus Solid solution Slag structure

Design and Implementation of Indoor positioning System using Bluetooth Low Energy

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Design and Implementation of Indoor Positioning System using...

Dense-Structured Network Based Bearing Remaining Useful Life Prediction System

作者： Xianfeng Hu Kun-Ming Yu Ken H.Chuang huan-po hsu Chung-Hsing Liu Shang-Wei Tung Yen-Chiu Chen Ming-Yuan Lei Nancy Tsai Program in Engineering Science Chung Hua University Dept.of Computer Science & Information Engineering Chung Hua University Dept.of Information Management Chung Hua University

Most of the positioning systems nowadays require *** indoor environments,however,GPS signals cannot be received properly due to the obstructions of the walls in the ***,other techniques such as RFID,Zigbee,WIFI or Bluetooth,are used based on the power loss,cost,or transmission range *** study,conducted at the AI+ Experience Center of Chung Hua University,adopts Bluetooth 5.0-based equipment and uses the received signal strength indication（RSSI） and triangulation method to perform indoor *** results show that Bluetooth positioning is more accurate in the sense that when the distance is within 1～3 meters,the error with the actual position is about 1 meter,which is more accurate than the RFID or WIFI positioning with the error of 2～3 meters.

关键词：

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Computer Modeling in Engineering & Sciences 2022年第10期131卷 133-151页

作者： Ping-huan Kuo Ting-Chung Tseng po-Chien Luan Her-Terng Yau Department of Mechanical Engineering National Chung Cheng UniversityChiayi62102Taiwan Advanced Institute of Manufacturing with High-Tech Innovations(AIM-HI) National Chung Cheng UniversityChiayi62102Taiwan

This work is focused on developing an effective method for bearing remaining useful life *** method is useful in accurately predicting the remaining useful life of bearings so that machine damage,production outage,and human accidents caused by unexpected bearing failure can be *** study uses the bearing dataset provided by FEMTO-ST Institute,Besancon,*** study starts with the exploration of neural networks,based on which the biaxial vibration signals are modeled and *** paper introduces pre-processing of bearing vibration signals,neural network model training and adjustment of training *** model is trained by optimizing model parameters and verifying its performance through *** proposed model’s superiority is also confirmed through a comparison with other *** this study,the neural network model is trained with various types of bearing data and can successfully predict the remaining useful *** algorithm proposed in this study achieves a prediction accuracy of coefficient of determination as high as 0.99.

关键词： Bearing neural network remaining useful life prediction machine learning

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独词句研究:现状与展望

外语学刊 2024年第4期 31-37页

作者：黄弋桓杜世洪重庆交通大学外国语学院重庆400074 西南大学外国语学院重庆400715

独词句是一种特殊的语言现象,它在形式上极度简化,却能完成一个句子的功能。目前国内的独词句研究主要在非主谓句范畴内开展,国外则是在叹词范畴内讨论。本文总结独词句的研究现状,包括对独词句性质与地位的传统认识,分析传统认识存在... 详细信息

独词句是一种特殊的语言现象,它在形式上极度简化,却能完成一个句子的功能。目前国内的独词句研究主要在非主谓句范畴内开展,国外则是在叹词范畴内讨论。本文总结独词句的研究现状,包括对独词句性质与地位的传统认识,分析传统认识存在的问题,说明独词句研究的关键在于解决其形式与功能上的不匹配。对此,弗雷格的命题函数理论与维特根斯坦的语言游戏论可以提供解决独词句问题的新思路,据此建立起独词句的新研究范式,推进独词句研究的深入发展。

关键词：独词句性质地位命题函数理论语言游戏论饱和

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Ensemble Model for Spindle Thermal Displacement Prediction of Machine Tools

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Computer Modeling in Engineering & Sciences 2023年第10期137卷 319-343页

作者： Ping-huan Kuo Ssu-Chi Chen Chia-Ho Lee po-Chien Luan Her-Terng Yau Department of Mechanical Engineering National Chung Cheng UniversityChiayi62102Taiwan Advanced Institute of Manufacturing with High-Tech Innovations(AIM-HI) National Chung Cheng UniversityChiayi62102Taiwan

Numerous factors affect the increased temperature of a machine tool, including prolonged and high-intensity usage,tool-workpiece interaction, mechanical friction, and elevated ambient temperatures, among others. Consequently,spindle thermal displacement occurs, and machining precision suffers. To prevent the errors caused by thetemperature rise of the Spindle fromaffecting the accuracy during themachining process, typically, the factory willwarm up themachine before themanufacturing ***, if there is noway to understand the tool spindle’sthermal deformation, the machining quality will be greatly affected. In order to solve the above problem, thisstudy aims to predict the thermal displacement of the machine tool by using intelligent algorithms. In the practicalapplication, only a few temperature sensors are used to input the information into the prediction model for realtimethermal displacement prediction. This approach has greatly improved the quality of tool ***,each algorithm has different performances in different environments. In this study, an ensemble model is used tointegrate Long Short-TermMemory (LSTM) with Support VectorMachine (SVM). The experimental results showthat the prediction performance of LSTM-SVM is higher than that of other machine learning algorithms.

关键词： Thermal displacement ensemble model LSTM milling machine spindle

鼻渊通窍颗粒联合曲尼司特治疗变应性鼻炎的临床研究

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现代药物与临床 2024年第1期39卷 186-189页

作者：于雪莹孙欢张欢刘乃斌徐建华青岛市城阳区人民医院耳鼻咽喉科山东青岛266109

目的探讨鼻渊通窍颗粒联合曲尼司特治疗变应性鼻炎的临床疗效。方法选取2021年8月—2023年5月青岛市城阳区人民医院收治的150例变应性鼻炎患者,按随机数字表法分为对照组(75例)和治疗组(75例)。对照组口服曲尼司特胶囊,1粒/次,3次/d... 详细信息

目的探讨鼻渊通窍颗粒联合曲尼司特治疗变应性鼻炎的临床疗效。方法选取2021年8月—2023年5月青岛市城阳区人民医院收治的150例变应性鼻炎患者,按随机数字表法分为对照组(75例)和治疗组(75例)。对照组口服曲尼司特胶囊,1粒/次,3次/d。治疗组在对照组的基础上口服鼻渊通窍颗粒,1袋/次,3次/d。两组连服药8周。观察两组患者临床疗效,比较治疗前后两组患者症状改善时间,血清水通道蛋白5(AQP5)、白细胞介素-4(IL-4)、肿瘤坏死因子-α(TNF-α)和细胞间黏附因子-1(ICAM-1)水平及生活质量(RQLQ)评分。结果治疗后,治疗组总有效率为97.33%,明显高于对照组(86.67%,P<0.05)。治疗后,治疗组出现的鼻塞、喷嚏、鼻痒、流涕等症状改善时间均早于对照组(P<0.05)。治疗后,两组血清AQP5、IL-4、TNF-α、ICAM-1水平明显降低(P<0.05),且治疗组患者这些血清因子水平明显低于对照组(P<0.05)。治疗后,两组RQLQ评分均明显降低(P<0.05),且治疗组评分明显低于对照组(P<0.05)。结论鼻渊通窍颗粒联合曲尼司特治疗治疗变应性鼻炎可明显改善症状,促进机体炎性反应减弱,患者生活质量明显提升。

关键词：鼻渊通窍颗粒曲尼司特胶囊变应性鼻炎水通道蛋白5 肿瘤坏死因子-α 细胞间黏附因子-1

Fretting wear behaviour of high-nitrogen stainless bearing steel under lubrication condition

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Journal of Iron and Steel Research(International) 2020年第7期27卷 849-866页

作者： huan Lin Mao-sheng Yang Bai-po Shu College of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Institute for Special Steel Central Iron and Steel Research InstituteBeijing 100081China

The fretting wear performance of high-nitrogen stainless bearing steel(40Cr15Mo2VN)under lubrication conditions was ***-based grease was preparedusing MoS2 and carbon nanotubes(CNTs)as *** 52100 steel ball was used in four-ball test to evaluate the extreme pressure property and wear resistance of *** four-ball test,the grease adding 0.8 mass%MoS2 and 0.8 mass%CNTs,respectively,was chosen and used for fretting *** 52100 ball and 40Cr15Mo2VN steel disc were used as the upper and lower samples for fretting *** results showed that wear power consumption increased with the increase in both sliding velocity and contact *** initial contact stress was 2.047 GPa,the main wear mechanisms were abrasive wear and plastic deformation as the velocity increased 0.028 to 0.112 m/*** the velocity was 0.028 m/s,the main wear mechanisms changed abrasive wear to adhesion wear and finally to abrasive wear and adhesion wear as the initial contact stress increased 1.788 to 2.579 *** volume loss grew sharply becaof the changes in wear *** this condition,the volume loss growth rate can be divided into three regions according to different wear power consumption ranges corresponding to different wear mechanisms.

关键词： High-nitrogen steel Sliding velocity Contact stress Adhesion wear Abrasive wear Wear power consumption

“Always learn today, stand ready to act tomorrow”--po Tien: A pioneer of Virology in China

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Protein & Cell 2022年第2期13卷 79-81页

作者： Xin Zhang huan Liu Institute of Biophysics Chinese Academy of SciencesBeijing 100101China Wuhan Institute of Virology Chinese Academy of SciencesWuhan 430071China Chinese Center for Disease Control and Prevention Beijing 102206China State Key Laboratory of Virology Wuhan 430072China

There is a scientist who was engaged in truly great achievements of modern virology in *** first successfully applied viral satellite RNA as a biological control agent to prevent viral plant diseases(Tien,1996),concluding that ribozyme-mediated high resistance against potato spindle tuber viroid in transgenic potatoes could reduce the pathogen to an undetectable level(Yang et al.,1997).He isolated a HBV-specific peptide associated with heat-shock protein gp96 from liver cancer tissues of HBV-infected patients for the first time(Meng et al.,2001).

关键词： diseases today