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Improvement of mechanical properties of Sn-58Bi alloy with multi-walled carbon nanotubes

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中国有色金属学会会刊：英文版 2012年第S3期22卷 692-696页

作者： HE Peng Lü Xiao-chun LIN Tie-song LI Hai-xin AN Jing MA Xin FENG Ji-cai ZHANG Yan LI Qi QIAN Yi-yu State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Department of Materials Science and Engineering Shenzhen Graduate SchoolHarbin Institute of Technology Yik Shing Tat industrial company limited CNano Technology (Beijing) limited

Carbon nanotubes (CNTs) reinforced Sn-58Bi composites were successfully fabricated through ball-milling method and low temperature melting *** influence of multi-walled carbon nanotubes (MWCNTs) on the mechanical strength and ductility of Sn-58Bi lead-free alloy was *** mechanical test results show that the bending strength of Sn-58Bi-0.03CNTs (mass fraction,%) composite is increased by 10.5% than that of the Sn-58Bi alloy,which can be attributed to the reduction of Sn-rich segregation and the grain *** toughness of Sn-58Bi-0.03CNTs composite is increased by 48.9% than that of the matrix *** is indicated that the influence of CNTs on the strength of Sn-58Bi-xCNTs composite is *** addition,the fracture mechanism of CNTs reinforced Sn Bi composite was *** corresponding fracture surface comparison between the Sn-58Bi-0.03CNTs composite and the monolithic Sn-58Bi alloy was made to identify the influence of CNTs on the fracture behavior and the reinforcing effect of CNTs.

关键词： carbon nanotubes metal-matrix composites mechanical properties fracture mechanism

Integrated design optimization of composite frames and materials for maximum fundamental frequency with continuous fiber winding angles

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Acta Mechanica Sinica 2018年第6期34卷 1084-1094页

作者： Zunyi Duan Jun Yan Ikjin Lee Jingyuan Wang Tao yu State Key Laboratory of Structural Analysis for industrial Equipment Department of Engineering MechanicsInternational Research Center for Computational MechanicsDalian University ofTechnologyDalian 1 16024China Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea Harbin Electric Power Equipment company limited Harbin Electric Corporation LimitedHarbin 150028China

Fiber reinforced composite frame structure is an ideal lightweight and large-span structure in the fields of aerospace,satellite and wind *** fundamental frequency is one of key indicators in the design requirement of the composite frame since structural resonance can be effectively avoided with the increase of the fundamental *** by the concept of integrated design optmization of composite frame structures and materials,the design optimization for the maximum structural fundamental frequency of fiber reinforced frame structures is *** optimization model oriented at the maximum structural fundamental frequency under a composite material volume constraint is *** kinds of independent design variables are optimized,in which one is variables represented structural topology,the other is variables of continuous fiber winding *** analysis of the frequency with respect to the two kinds of independent design variables is implemented with the semi-analytical sensitivity *** representative examples in the manuscript demonstrate that the integrated design optimization of composite structures can effectively explore coupled effects between structural configurations and material properties to increase the structural fundamental *** proposed integrated optimization model has great potential to improve composite frames structural dynamic performance in aerospace industries.

关键词： Integrated optimization Maximum fundamental frequency Composite frame structures Continuous fiber winding angle Semi-analytical sensitivity analysis

Possibilities and prospects for producing silumins with different silicon contents using amorphous microsilica

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Transactions of Nonferrous Metals Society of China 2020年第5期30卷 1406-1418页

作者： M.P.KUZ′MIN M.yu.KUZ′MINA P.B.KUZ′MIN Irkutsk National Research Technical University 83 Lermontov St.IrkutskRussia limited Liability company“United company RUSAL Engineering and Technology Center” 4 Industrial St.ShelekhovIrkutsk RegionRussia

The main objective of this work is to research complex physical-chemical processes of Al(l)-SiO2 interface and develop a new technology for producing foundry silumins based on amorphous microsilica obtained from silicon production waste. Effective methods for producing hypoeutectic, eutectic, and hypereutectic silumins using amorphous microsilica were developed. Alloys with a silicon content of 7 wt.% were obtained by blowing preheated amorphous microsilica into the aluminum melt(t=900 ℃) along with the stream of argon followed by intense mixing. Alloys with a silicon content of 21 wt.% were manufactured by induction melting of a silicon-containing mixture(60% Si O2, 40%Al + 20%3 Na F·2 Al F3) subjected to the presintering when the amorphous microsilica was reduced to crystalline silicon. It is found that crystalline silicon, which is formed during the roasting of the tableted burden, is smoothly absorbed by the aluminum melt. Aluminum oxide, obtained during the redox reaction, dissolves in cryolite, after which aluminum and silicon are fused together and transferred to the melt. The calculation of the economic efficiency of producing silumins using amorphous microsilica demonstrates a quick project payback period, as well as a high level of its profitability.

关键词： aluminum silicon silumins microsilica silicon dioxide

Energy saving and environment-friendly element-transfer reactions with industrial application potential

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Chinese Chemical Letters 2020年第5期31卷 1078-1082页

作者： Chao Chen Yitao Cao Xixi Wu yuanli Cai Jian Liu Lin Xu Kehong Ding Lei yu School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Tianzhu Hongfu Lithium Industry Technology Development company limited Wuwei 733200China Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu 804-8550Japan Jiangsu Yangnong Chemical Group company limited Yangzhou 225009China

Herein we wish to propose the concept of"element-transfer reaction",which may afford the access to elemental compounds by transferring certain elements from easily available resources efficiently,concisely and precisely.A good element-transfer reaction with industrial application potential shall not generate waste and is performed under energy-saving and environment-friendly *** the past decade,we have developed a series of methods for the synthesis of fluorine-and seleniumcontaining compounds via the fluorine-and selenium-transfer reactions,while the redox reactions we re considered to be the oxygen-and hydrogen-transfer reactions as well and were also widely studied by our group for producing the high-value-added fine *** of these technologies have been successfully *** review summarizes our staged research results on fluorine-,oxygen-,hydrogen-and selenium-transfer reactions and makes a prospect on the developing trend in the field.

关键词： Element-transfer reaction Fluorine Redox Selenium Green chemistry Photocatalysis

Unraveling the core functional bacteria and their succession throughout three fermentation stages of broad bean paste with chili

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Food Science and Human Wellness 2022年第4期11卷 874-885页

作者： Songfeng yu Jia Song Tao Hu Jun Wang Xiaojing Liu yu Zheng Lei Shi Shoupeng Wan Min Wang State Key Laboratory of Food Nutrition and Safety Key Laboratory of Industrial Fermentation MicrobiologyMinistry of EducationCollege of BiotechnologyTianjin University of Science and TechnologyTianjin 300457China College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058China Tianjin Limin Condiment limited company Tianjin 300308China

The entire fermentation process of traditional Chinese broad bean paste with chili comprises three individual stages:Tianbanzi,chili pei,and paste fermentation(Tianbanzi-chili pei mixture).Three stages share average 77.53%of all bacteria(89 genera),indicating that the similar environment leads to the similar bacterial ***,one,and three genera are exclusive to Tianbanzi,chili pei,and paste stages,respectively,due to the special physical and chemical properties for each *** acidity,pH,and NaCl are important endogenous factors that promote the succession of bacterial *** to the dynamics of organic acids,reducing sugars,amino acids,and volatile compounds,60-,210-,and 180-day are considered the best fermentation periods for Tianbanzi,chili pei,and paste,respectively,to balance time cost and product ***(Tetragenococcus,Lactobacillus,and Pseudomonas),four(Tetragenococcus,Lactobacillus,Bacillus,and Pseudomonas),and five(Tetragenococcus,Lactobacillus,Bacillus,Pseudomonas,and Pediococcus)genera are considered the core functional bacteria of Tianbanzi,chili pei,and paste fermentation,respectively.

关键词： Broad bean paste with chili Canonical correspondence analysis Flavor compounds Microbial community Core bacteria

Improving EGT sensing data anomaly detection of aircraft auxiliary power unit

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Chinese Journal of Aeronautics 2020年第2期33卷 448-455页

作者： Liansheng LIU yu PENG Lulu WANG yu DONG Datong LIU Qing GUO School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150080China China Southern Airlines company limited Shenyang Maintenance Base Shenyang 110169China China Southern Airlines Engineering Technology Research Center Shenyang 110169China

The reliability of the on-wing aircraft Auxiliary Power Unit(APU)decides the cost and the comfort of flight to a large *** most important function of APU is to help start main engines by providing compressed *** on the condition of sudden shutdown in the air,APU can offer additional thrust for ***,its condition monitoring has drawn much attention from the academic and industrial *** the on-wing sensing data which can reflect its condition,Exhaust Gas Temperature(EGT)is one of the most important *** ensure the reliability of EGT,one kind of data-driven anomaly detection framework for EGT sensing data is proposed based on the Gaussian Process Regression and Kernel Principal Component *** situations of one-dimensional and two-dimensional input data for EGT anomaly detection are considered,*** cross-validation experiments are carried out by utilizing the real condition data of APU,which are provided by China Southern Airlines company limited Shenyang Maintenance *** anomalous stuck condition of EGT sensing data is also *** results show that the proposed EGT sensing data anomaly detection method can achieve better performance of false positive ratio,false negative ratio and accuracy.

关键词： Anomaly detection Auxiliary power unit Condition-based maintenance Data-driven framework Exhaust gas temperature

Chloro-free synthesis of LiPF_(6)using the fluorine-oxygen exchange technique

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Chinese Chemical Letters 2022年第8期33卷 4061-4063页

作者： Jian Liu yuanli Cai Huan Pang Bin Cao Chengzhi Luo Zhenghao Hu Chaoqun Xiao Hu Zhang Fulu Lv Yitao Cao Lei yu School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Tianzhu Hongfu Lithium Industry Technology Development company limited Wuwei 733200China Royal Holloway University of LondonEgham TW200QRUnited Kingdom

A hydrogen fluoride-free and chloro-free method for synthesizing LiPF_(6) was *** CaF_(2) as the direct fluorinating reagent instead of hydrogen fluoride made it much safer and more environmentfriendly than conventional methods and reduced the metal residues in product owing to the relatively low-acid reaction conditions less corrosive to *** use of P_(2)O_(5) as phosphorus source instead of traditionally employed PCl_(5) significantly reduced the chloro residue in ***(H_(2)PO_(4))_(2),the only by-product of the process,could be easily converted into Ca_(3)(PO_(4))_(2),a best-selling *** above advantages not only reduce the production costs by ca.20%,but also significantly improve the product *** fluorine-oxygen exchange reaction is a completely new technique for LiPF_(6) production and may bring about technological revolution in the related industry.

关键词： Lithium Fluorine Electrolyte High purity Green chemistry Process

A CRISPR/Cas12a-empowered surface plasmon resonance platform for rapid and specific diagnosis of the Omicron variant of SARS-CoV-2

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National Science Review 2022年第8期9卷 100-109页

作者： Zhi Chen Jingfeng Li Tianzhong Li Taojian Fan Changle Meng Chaozhou Li Jianlong Kang Luxiao Chai Yabin Hao yuxuan Tang Omar A.Al-Hartomy Swelm Wageh Abdullah G.Al-Sehemi Zhiguang Luo Jiangtian yu Yonghong Shao Defa Li Shuai Feng William J.Liu Yaqing He Xiaopeng Ma Zhongjian Xie Han Zhang Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education 3. Shenzhen Institute of Translational Medicine 4. Department of Otolaryngology Shenzhen Second People’s Hospital 5. the First Affiliated Hospital 6. Institute of Microscale Optoelectronics Shenzhen University 7. Shenzhen International Institute for Biomedical Research 8. Shenzhen Han’s Tech Limited Company 9. Shenzhen Metasensing Tech Limited Company Department of Physics Faculty of Science King Abdulaziz University Research Center for Advanced Materials Science (RCAMS) King Khalid University Department of Chemistry College of Science King Khalid University Zhongmin (Shenzhen) Intelligent Ecology Co.Ltd Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Department of Laboratory Medicine Shenzhen Children’s Hospital Optoelectronics Research Center School of Science Minzu University of China NHC Key Laboratory of Biosafety National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention Research Unit of Adaptive Evolution and Control of Emerging Viruses Chinese Academy of Medical Sciences Institute of Pathogenic Organism Shenzhen Center for Disease Control and Prevention Respiratory Department Shenzhen Children’s Hospital Institute of Pediatrics Shenzhen Children’s Hospital

The outbreak of the COVID-19 pandemic was partially due to the challenge of identifying asymptomatic and presymptomatic carriers of the virus, and thus highlights a strong motivation for diagnostics with high sensitivity that can be rapidly deployed. On the other hand, several concerning SARS-Co V-2 variants,including Omicron, are required to be identified as soon as the samples are identified as ‘positive’.Unfortunately, a traditional PCR test does not allow their specific identification. Herein, for the first time,we have developed MOPCS(Methodologies of Photonic CRISPR Sensing), which combines an optical sensing technology-surface plasmon resonance(SPR) with the ‘gene scissors’ clustered regularly interspaced short palindromic repeat(CRISPR) technique to achieve both high sensitivity and specificity when it comes to measurement of viral variants. MOPCS is a low-cost, CRISPR/Cas12a-systemempowered SPR gene-detecting platform that can analyze viral RNA, without the need for amplification,within 38 min from sample input to results output, and achieve a limit of detection of 15 fM. MOPCS achieves a highly sensitive analysis of SARS-Co V-2, and mutations appear in variants B.1.617.2(Delta),B.1.1.529(Omicron) and BA.1(a subtype of Omicron). This platform was also used to analyze some recently collected patient samples from a local outbreak in China, identified by the Centers for Disease Control and Prevention. This innovative CRISPR-empowered SPR platform will further contribute to the fast, sensitive and accurate detection of target nucleic acid sequences with single-base mutations.

关键词： surface plasmon resonance CRISPR SARS-CoV-2 Omicron variant

Minimizing interfacial energy losses in inverted perovskite solar cells by a dipolar stereochemical 2D perovskite interface

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Journal of Energy Chemistry 2024年第3期90卷 496-503,I0011页

作者： Junjie Qian Jingjing He Qihang Zhang Chenyue Zhu Shilin Chen Zhanpeng Wei Xuesong Leng Ziren Zhou Benben Shen yu Peng Qiang Niu Shuang Yang yu Hou Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China National Enterprise Technology Center Inner Mongolia Erdos Electric Power and Metallurgy Group Company LimitedOrdos 016064Inner MongoliaChina

Inverted perovskite solar cells(PSCs) have attracted broad research and industrial interest owing to their suppressed hysteresis,cost-effectiveness,and ***,the issue of non-radiative recombination losses at the n-type interface between the perovskite and fullerene has impeded further improvement of photovoltaic ***,we modify the n-type interface of FAPbI_(3) perovskite films by constructing a stereochemical two-dimensional(2D) perovskite interlayer,in which the organic cations comprise both pyridine and ammonium *** pyridine N donor can create stable bonding with the surface-uncoordinated Pb on the perovskite,thereby passivating the shallow-level defects and enhancing the air stability of the ***,the pyridine N donor also offers a positive polar interface to decrease the surface work function of the perovskite film,enabling n-type ***,we employ a p-i-n photovoltaic(PV) device with the positive dipole interlayer at perovskite/fullerene contact and achieve remarkable photoelectric conversion efficiency(PCE) of 22.0%.

关键词： Perovskite solar cells Dipole interlayer Stereochemistry Non-radiative recombination