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Rare Metals 2022年第8期41卷 2759-2766页

作者： Xue-Feng tang Bao-yu Wang Ning Zhang yuan-Ming Huo jing Zhou School of Mechanical Engineering University of Science and Technology BeijingBeijing100083China Beijing Aeronautical Manufacturing Technology Research Institute Beijing100024China

Microstructural evolution and flow behavior greatly affect the hot forming process of *** this research,hot deformation behaviors of IN718 were investigated by performing hot compression tests at temperature range of 1000-1100℃with strain rates of 0.1-20.0 s^(-1).By incorporating physically based internal state variables such as dislocation density,volume fraction of dynamic recrystallization,and grain size,a set of unified viscoplastic constitutive equations were developed to predict the microstructural evolution and flow behavior of *** material constants were determined using a genetic algorithm(G A)-based optimization *** of the computed and experimental results indicate that the constitutive equations established in this study can accurately describe the hot deformation behavior and microstructural evolution of IN718.

关键词： IN718 Microstructural evolution Flow behavior Constitutive equations Internal state variables

Bacteria inactivation by sulfate radical:progress and non-negligible disinfection by-products

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Frontiers of Environmental Science & Engineering 2023年第3期17卷 23-36页

作者： Xin Zhou Xiaoya Ren yu Chen Haopeng Feng Jiangfang yu Kang Peng yuying Zhang Wenhao Chen jing tang Jiajia Wang Lin tang College of Environmental Science and Engineering Hunan UniversityChangsha 410082China Key Laboratory of Environmental Biology and Pollution Control(Hunan University) Ministry of EducationChangsha 410082China

Sulfate radicals have been increasingly used for the pathogen inactivation due to their strong redox ability and high selectivity for electron-rich species in the last *** application of sulfate radicals in water disinfection has become a very promising ***,there is currently a lack of reviews of sulfate radicals inactivated pathogenic *** the same time,less attention has been paid to disinfection by-products produced by the use of sulfate radicals to inactivate *** paper begins with a brief overview of sulfate radicals’***,the progress in water disinfection by sulfate radicals is *** mechanism and inactivation kinetics of inactivating microorganisms are briefly *** that,the disinfection by-products produced by reactions of sulfate radicals with chlorine,bromine,iodide ions and organic halogens in water are also *** response to these possible challenges,this article concludes with some specific solutions and future research directions.

关键词： Sulfate radicals Disinfection by-products Inactivation mechanisms Bacterial inactivation Water disinfection

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铋钼青铜单晶的制备和结构分析

武汉大学学报（自然科学版） 1996年第3期42卷 341-346页

作者：熊锐石兢余祖兴汤五丰田德诚杨业智莫少波武汉大学物理学系武汉430072 武汉大学测试中心

介绍了利用Bi_2O_3和MoO_3制备高质量紫色Bi-Mo-O单晶的电化学方法．能谱分析给出该单晶的化学式为Bi_(0.19)MoO_3,X射线衍射得到该单晶具有正交对称性,空间群为P_(mmma),晶胞参数为:a＝1.9985nm,b＝0.4085nm,c＝1.4437nm．X射线光电子... 详细信息

介绍了利用Bi_2O_3和MoO_3制备高质量紫色Bi-Mo-O单晶的电化学方法．能谱分析给出该单晶的化学式为Bi_(0.19)MoO_3,X射线衍射得到该单晶具有正交对称性,空间群为P_(mmma),晶胞参数为:a＝1.9985nm,b＝0.4085nm,c＝1.4437nm．X射线光电子能谱分析揭示在价带顶附近存在着一个窄的成键能带,Mo-3d芯能级谱含有Mo^(5+)和Mo^(6+)的特征。

关键词：铋钼青铜单晶制备结构分析铜晶体结构

Valuation of American Strangles Through an Optimized Lower–Upper Bound Approach

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Journal of the Operations Research Society of China 2018年第1期6卷 25-47页

作者： jing-tang Ma Wen-yuan Li Zhen-yu Cui School of Economic Mathematics and Collaborative Innovation Center of Financial Security Southwestern University of Finance and EconomicsChengdu 611130China School of Economic Mathematics Southwestern University of Finance and EconomicsChengdu 611130China School of Business Stevens Institute of TechnologyHobokenNJ 07030

In this paper,we construct tight lower and upper bounds for the price of an American strangle,which is a special type of strangle consisting of long positions in an American put and an American call,where the early exercise of one side of the position will knock out the remaining *** contract was studied in Chiarella and Ziogas(J Econ Dyn Control 29:31–62,2005)with the corresponding nonlinear integral equations derived,which are hard to be solved efficiently through numerical *** extend the approach in the paper of Broadie and Detemple(Rev Finance Stud 9:1211–1250,1996)from the case of American call options to the case of American *** establish theoretical properties of the lower and upper bounds,and propose a sequential optimization algorithm in approximating the early exercise boundary of the American strangle. The theoretical bounds obtained can beeasily evaluated, and numerical examples confirm the accuracy of the approximationscompared to the literature.

关键词： Option pricing American strangle Lower and upper bounds Early exercise boundaries Optimization

Experimental investigation of early assessment of corpora cavernosa fibrosis with two-dimensional shear wave elastography

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Asian Journal of Andrology 2022年第2期24卷 207-212页

作者： Li yu Wan-Ting Rao jing-Dong tang Jin-Fang Xing Department of Special Inspection Shanghai Shibei Hospital of Jing’an DistrictShanghai 200435China Department of Medical Ultrasound Fudan University Pudong Medical CenterShanghai 201399China Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling Fudan University Pudong Medical CenterShanghai 201399China

This study explored the usefulness of two-dimensional shear wave elastography(2D-SWE)in the early assessment of corpora cavernosa fibrosis(CCF).New Zealand male rabbits were randomly assigned to an experimental group or a control *** human transforming growth factor beta 1(TGF-β1)was injected into the dorsal penis tissue of rabbits in the experimental *** ultrasound and 2D-SWE examinations were performed before and 20 days after *** histological analysis was performed by hematoxylin–eosin staining,sirius red staining,and *** of 2D-SWE examination results was performed using shear wave elastography quantitative measurement(SWQ).Histological analysis outcomes were the proportion of smooth muscle cells(SMCs),collagen fibers(CFs),collagen type I(Col I),and collagen type III(Col III),as well as the SMCs/CFs ratio,measured by sirius red *** histological analysis outcomes were the positive area proportion(PAP)of TGF-β1(PAPT),fibronectin(PAPF),and Col III(PAPC),measured by *** recombinant human TGF-β1 injection,SWQ was higher in the experimental group than that in the control group(P<0.001);however,there were no differences in conventional ultrasound *** were significant differences in histological outcomes between the two groups(all P<0.05).These results indicated that 2D-SWE was superior for identifying early histological changes in CCF.

关键词： collagen type I collagen type III elastography penis smooth muscle cells

No evidence for an effect of Wolbachia on mtDNA variation and evolution in natural populations of Sesamia inferens(Lepidoptera: Noctuidae)

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Journal of Integrative Agriculture 2019年第5期18卷 1050-1063页

作者： tang Xiao-tian XU jing LU Ming-xing DU yu-zhou School of Horticulture and Plant Protection & Institute of Applied Entomology Yangzhou University Department of Entomology Texas A&M University Joint International Research Laboratory of Agriculture and Agri-Product Safety Ministry of Education/Yangzhou University

Wolbachia are widespread maternally-inherited endosymbiotic bacteria that infect numerous *** study represents a thorough survey of the Wolbachia infection patterns in the pink stem borer,Sesamia inferens(Walker),an important rice pest in China,based on nucleotide comparisons for the surface protein(wsp)and cell division protein(ftsZ)*** effects of Wolbachia on mtDNA variation and evolution of *** were also *** we identified six genetically diverse strains,we found infections to be infrequent,with only 7.8%of hosts infected,and identified geographical differences in infection rates between southern and northern *** indexes(haplotype diversity(Hd),nucleotide diversity(π)and number of variable sites(S)of mtDNA in infected populations were not significantly lower or higher than that in the uninfected ***,there was no association between Wolbachia infection status and phylogeny of mtDNA *** of molecular variance(AMOVA)showed that significant differentiation mainly existed within groups rather than among the ***,using Tajima’s D and Fu’s F values,the mtDNA genes did not deviate significantly from neutral *** together these results indicate that currently there were no effects of Wolbachia infection on host mtDNA variation and evolution in ***.

关键词： Wolbachia Sesamia inferens effect mtDNA prevalence

Amino acid assisted aqueous synthesis of highly stable CsPbBr_(3)nanocrystals for cell imaging

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Nano Research 2025年第1期18卷 675-683页

作者： Xue Li Yanan Guo Guoying Tan Qingyi Liu Nan Song yu tang State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Lead halide perovskite nanocrystals(NCs)exhibit excellent optoelectronic performance and have drawn great interests in the fields of biological imaging and ***,the poor stability of CsPbX_(3)(X=Cl,Br,I)in water is still a challenge to hinder their practical *** this work,a facile strategy has been developed for aqueous synthesis of CsPbX_(3) nanocrystals,in which L-glutamic acid(LGlu)has been used to replace oleic acid in the synthetic *** from the synergic effects of L-Glu and oleylamine(OAm),CsPbBr_(3)nanocrystals(L-Glu/OAm-CsPbBr_(3)NCs)with high water stability have been directly prepared under a mild condition at room temperature in water,facilitated by the process of crystal phase transformation from Cs_(4)PbBr_(6) to CsPbBr_(3).L-Glu/OAm-CsPbBr_(3)NCs exhibit a high quantum yield of 85%and a narrow full width at half maximum of 16 nm,demonstrating their efficient luminescence in ***,L-Glu on the surface have contributed greatly to an acidic environment and passivation of surface defects,improving the water stability and dispersibility of CsPbBr_(3)***,L-Glu/OAm-CsPbBr_(3)NCs exhibit great biocompatibility due to the presence of L-Glu,resulting in their good performance for HeLa cell ***,we propose a facile and effective method to prepare CsPbBr_(3)nanocrystals with excellent water stability by using L-Glu and OAm as cooperated ligands and expand their application in cell imaging.

关键词： aqueous synthesis cell imaging lead halide perovskite nanocrystals L-glutamic acid phase transformation

Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 504-514页

作者： Lou Zhang Shuo Li Fu tang jingkai Zhang yuetong Kang Hean Zhang Lidong Li State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Silver nanoparticles(Ag NPs)have attracted attention in the field of biomaterials due to their excellent antibacterial ***,the reducing and stabilizing agents used for the chemical reduction of Ag NPs are usually toxic and may cause water *** this work,Ag NPs(31.2 nm in diameter)were prepared using the extract of straw,an agricultural waste,as the reducing and stabilizing *** analysis revealed that the straw extract contained lignin,the structure of which possesses phenolic hydroxyl and methoxy groups that facilitate the reduction of silver salts into Ag *** surfaces of Ag NPs were negatively charged due to the encapsulation of a thin layer of lignin molecules that prevented their *** the prepared Ag NPs were added to the precursor solution of acrylamide,free radical polymerization was triggered without the need for extra heating or light irradiation,resulting in the rapid formation of an Ag NP-polyacrylamide composite *** inhibition zone test proved that the composite hydrogel possessed excellent antibacterial ability due to the presence of Ag *** prepared hydrogel may have potential applications in the fabrication of biomedical materials,such as antibacterial dressings.

关键词： silver nanoparticles hydrogel straw extraction antibacterial

New model for load-sharing k-out-of-n:G system with different components

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Journal of Systems Engineering and Electronics 2008年第4期19卷 748-751,842页

作者： tang Yinghui Zhang jing School of Mathematics & Software Science Sichuan Normal Univ. Chengdu 610066 P. R. China

On the basis of capacity flow model, a new model is developed for a load-sharing k-out-of-n： G system consisting of different components, to describe the increase of the same component＇s failure rates under different loads. All components have exponential life distributions and are nonrepairable in the system. Reliability of load- sharing 2-out- of-3： G system is calculated and some special cases for the system are discussed. The calculation and discussions show that the model is right and practical.

关键词： load-sharing k-out-of-n: G system system reliability

Preparation of ultrahigh-surface-area sludge biopolymers-based carbon using alkali treatment for organic matters recovery coupled to catalytic pyrolysis

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Journal of Environmental Sciences 2021年第8期33卷 83-96页

作者： yu Zhang Jiayi tang Weijun Zhang jing Ai Yanyang Liu Qiandi Wang Dongsheng Wang School of Environmental Studies China University of GeosciencesWuhan 430074China Hubei Provincial Engineering Research Center of Systematic Water Pollution Control Wuhan 430074China Faculty of Materials Science and Chemistry China University of GeosciencesWuhan 430074China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco–Environmental SciencesChinese Academy of SciencesBeijing 100085China

In this work,we employed waste activated sludge(WAS)as carbon source to prepare ultrahigh specific surface area(SSA)biopolymers-based carbons(BBCs)through alkali(KOH)treatment coupled to pyrolysis *** the pyrolysis process,the involvement of KOH made a great recovery of soluble biopolymers from WAS,resulting in highly-efficient catalytic *** Brunner-Emmett-Teller and pore volume of BBCs prepared at 800℃(BBC800)reached the maximum at 2633.89 m2·g-1 and 2.919 m3·g-1,respectively.X-ray photoelectron spectroscopy suggested that aromatic carbon in the form of C=C was the dominant fraction of C element in *** N element in BBCs were composed of pyrrolic nitrogen and pyridinic nitrogen at 700℃,while a new graphitic nitrogen appeared over 800℃.As a refractory pollutant of wastewater treatment plants,tetracycline(TC)was selected to evaluate adsorption performance of *** adsorption behavior of BBCs towards TC was conformed to the pseudo-second-order kinetic and the Langmuir models,signifying that chemisorption of monolayers was dominant in TC *** adsorption capacity of BBC800 reached the maximum at 877.19 mg·g-1 for 90 min at 298 *** analysis indicated that the adsorption process was endothermic and *** bonding andπ-πstacking interaction were mainly responsible for TC adsorption,and interfacial diffusion was the main rate-control step in adsorption *** presence of sol-uble microbial products(SMPs)enhanced TC *** work provided a novel strategy to prepare bio-carbon with ultrahigh SSA using WAS for highly-efficient removal of organic pollutants.

关键词： Waste activated sludge Biopolymers-based carbons Adsorption Tetracycline