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The Sensing Principle of FBG and Its Experimental Application in Structure Strengthening Detection

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Journal of Wuhan University of Technology(Materials Science) 2003年第3期18卷 94-96页

作者：袁海庆 School of Civil Engineering and Architecture Wuhan University of Technology

Based on the basic theory of the fiber Bragg grating sensor,a kind of stickup FBG sensor is developed,which is applied in the structure *** the experiment of the FBG senor and the common electricity sensor stuck on the reinforced structure,the result shows that the FBG sensor not only has a high performance,but also can realize the control on the spot and on the line.

关键词： fiber Bragg grating sense technology structure strengthening

Marketing　of　Libraries　and　Information　Centers　in　China:A　Case　Study

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情报理论与实践 1997年第2期20卷 35-41页

作者：Ｄｕ　Ｙｕａｎ　ｑｉｎｇＩｎｓｔｉｔｕｔｅ　ｆｏｒ　Ａｓｔｒｏｎａｕｔｉｃｓ　Ｉｎｆｏｒｍａｔｉｏｎ

ＭａｒｋｅｔｉｎｇｏｆＬｉｂｒａｒｉｅｓａｎｄＩｎｆｏｒｍａｔｉｏｎＣｅｎ┐ｔｅｒｓｉｎＣｈｉｎａ：ＡＣａｓｅＳｔｕｄｙ●ＤｕＹｕａｎｑｉｎｇ（ＩｎｓｔｉｔｕｔｅｆｏｒＡｓｔｒｏｎａｕｔｉｃｓＩｎｆｏｒｍａｔｉｏｎＢ... 详细信息

ＭａｒｋｅｔｉｎｇｏｆＬｉｂｒａｒｉｅｓａｎｄＩｎｆｏｒｍａｔｉｏｎＣｅｎ┐ｔｅｒｓｉｎＣｈｉｎａ：ＡＣａｓｅＳｔｕｄｙ●ＤｕＹｕａｎｑｉｎｇ（ＩｎｓｔｉｔｕｔｅｆｏｒＡｓｔｒｏｎａｕｔｉｃｓＩｎｆｏｒｍａｔｉｏｎＢｅｉｊｉｎｇ１０００１３）Ａｂｓｔ...

关键词： library Information center Marketing Information service China

Effect of CO_2 on Atmospheric Corrosion of UNS G10190 Steel under Thin Electrolyte Film

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Chemical Research in Chinese Universities 2000年第1期16卷 36-41页

作者： WANG Feng-ping ZHANG Xue-yuan and du yuan-long (State Key Lab for Corrosion and Protection, Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences, Shenyang 110015, P. R. China) Chinese Acad Sci Inst Corros & Protect Met State Key Lab Corros & Protect Shenyang 110015 Peoples R China

The atmospheric corrosion of UNS G10190 steel under a thin electrolyte film in the atmosphere polluted by CO_2, has been studied in the lab using an atmospheric corrosion monitor (ACM) in combination with XRD and SEM observations of the surface of steel. The ACM study indicated that the corrosion rate of the steel increased with increasing carbon dioxide concentration. The XRD and SEM observations showed that no carbonate was found in the corrosion product on the steel surface. The corrosion product consisted of two layers, i. e., inner and outer layer. From the experimental results, it was concluded that CO_2 played an enhancing role in the atmospheric corrosion of UNS G10190 steel. The film of the corrosion product showed slight protection.

关键词： Atmospheric corrosion Thin electrolyte film Carbon dioxide ACM UNS G10190 steel

Local search yields a PTAS for fixed-dimensional k-means problem with penalties

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Journal of the Operations Research Society of China 2024年第2期12卷 351-362页

作者： Fan yuan Da-Chuan Xu Dong-Lei du Dong-Mei Zhang Beijing Institute for Scientific and Engineering Computing Beijing University of TechnologyBeijing 100124China Faculty of Management University of New BrunswickFrederictonNB E3B 9Y2Canada School of Computer Science and Technology Shandong Jianzhu UniversityJinan 250101ShandongChina

We study a problem called the k-means problem with penalties(k-MPWP),which is a natural generalization of the typical k-means *** this problem,we have a set D of client points in R^(d),a set F of possible centers in R^(d),and a penalty cost Pj>O for each point j∈*** are also given an integer k which is the size of the center point *** want to find a center point set S■F with size k,choose a penalized subset of clients P■D,and assign every client in D\P to its open *** goal is to minimize the sum of the squared distances between every point in D\P to its assigned centre point and the sum of the penalty costs for all clients in *** using the multi-swap local search technique and under the fixed-dimensional Euclidean space setting,we present a polynomial-time approximation scheme(PTAS)for the k-MPWP.

关键词： Approximation algorithm k-means Local search Penalty

A novel AMH variant at the prehelix loop impairs the binding to AMHR2 and causes persistent Mullerian duct syndrome

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Asian Journal of Andrology 2024年第2期26卷 222-224页

作者： Qiang du Chuang Qiu yuan-yuan Zhang Xue-Jun Shang Xiao-Liang Liu Center of Reproductive Medicine Shengjing Hospital of China Medical UniversityShenyang 110004China Department of Orthopedics Shengjing Hospital of China Medical UniversityShenyang 110004China Department of Clinical Genetics Shengjing Hospital of China Medical UniversityShenyang 110004China Department of Urology Jinling HospitalSchool of MedicineNanjing UniversityNanjing 210012China

Dear Editor,Persistent Mullerian duct syndrome(PMDS;Online Mendelian Inheritance in Man[OMIM]:#261550)is a rare autosomal recessive inherent difference in sex development in males with Mullerian duct derivatives,including the uterus,fallopian tubes,and upper part of the vagina.'Approximately 88%of PMDS patients were found to have biallelic variants in the anti-Mullerian hormone(AMH;OMIM:*600957)or AMH type 2 receptor(AMHR2;OMIM:*600956)genes,and the rest were referred as idiopathic.I The serum AMH levels are usually very low or undetectable in PMDS patients with AMH gene mutations but normal or elevated in those with AMHR2 gene ***,an adult Chinese patient with PMDS carrying biallelic variants of the AMH gene was reported to have unexpectedly normal serum AMH *** refer to Supplementary Information of Patient and Methods for methodologies.

关键词： elevated AMH Muller

Evolution of hollow nanosphere to microtube in the self-assembly of chiral dansyl derivatives and inversed circularly polarized luminescence

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Chinese Chemical Letters 2024年第7期35卷 285-290页

作者： Sifan du yuan Wang Fulin Wang Tianyu Wang Li Zhang Minghua Liu Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of Chemistry and Chemical EngineeringSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China National Laboratory for Molecular Science(BNLMS) CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

Here,we designed asymmetric(m DS)and symmetrical(d DS)chiral V-shaped molecules by linking one or two dansyl groups to trans-1,2-cyclohexane diamine and investigated the solvent-regulated structural transformation and inversed circularly polarized luminescence(CPL)in the *** increasing water volume fraction(fw)in the mixed solvent of water/acetonitrile,asymmetric mDS selfassembled into hollow nanospheres and microtubes,while solid nanospheres and solid microplates were corresponding to symmetric d *** this transformation process,the emission of m DS and d DS was changed from yellow-green to blue and cyan color,which was ascribed to twisted intramolecular charge transfer(TICT)and locally excited(LE)fluorescence of V-shaped DS *** conformation of N,Ndimethyl groups with respect to naphthalene ring also led to the transformation of *** tubular and platelike structures had stronger and reversed CPL signals in comparison with spheroidal *** chiral information of DS assembly could be effective transferred to achiral Nile red via co-assembly strategy,which endowed Nile red exhibiting inversed induced CPL signal regulated by water *** work provides a method for achieving a variety of self-assembled structures with adjustable chiroptical properties.

关键词： CPL inversion Hollow structure Self-assembly Dansyl Chirality transfer

Polyphenolic Compound and the Degree of Browning in Processing Apple Varieties

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Agricultural Sciences in China 2007年第5期6卷 607-612页

作者： SONG Ye YAO Yu-xin ZHAI Heng du yuan-peng CHEN Feng WEI Shu-wei College of Horticulture Science and Engineering Shandong Agricultural University Taian 271018 P.R.China Jinan Fruit Research Institute All China Federation of Supply and Marketing Cooperatives Jinan 250014 P.R. China State Key Laboratory of Crop Biology Shandong Agricultural University Taian 271018 P.R. China

Polyphenolic compound in processing apple （Malus domestica Borkh.） varieties and the relationship between polyphenol content and enzymatic browning were studied to provide reference for raw material selection and processing method optimization. The content of polyphenol compound in 10 processing apple varieties （4 cider and 6 juice varieties） were analyzed using the Folin-Ciocalteu method and HPLC. The degree of browning and the activities of polyphenol oxidase were also studied. The content and proportion of the polyphenol varied depending on the variety. Bitter varieties globally showed a higher polyphenol concentration than sweet or acid varieties. Proanthocyanidins, chlorogenic acid, （＋）-catechin, （-）-epicatechin were high-concentrated polyphenols in apple fruits. Phloridzin, the unique polyphenol of apple, was abundant in the bitter variety Frequin rouge fruit. Total polyphenols, proanthocyanidins, （＋）-catechin, and phloridzin had higher correlations with browning. The correlation was low between chlorogenic acid and browning. The polyphenolic profiles were correlated with the apple types. Cider apples contained more polyphenol than juice apple varieties. The content of flavan-3-ol has a close relationship with fruit browning.

关键词： apple processing varieties polyphenolic compounds browning polyphenol oxidase

Investigation of stress distribution and damage behavior caused by forced installation of a composite bolted joint with a hole-location error

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Chinese Journal of Aeronautics 2024年第1期37卷 201-217页

作者： Chinan LIU yuan LI Yi CHENG An’an ZHAO Kunpeng du Yue SHI Ximing LI Hui CHENG School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China AVIC Xi’an Aircraft Industry Group Company LTD Xi’an 710089China

In this paper,the influence of forced installation caused by a hole-location error on the 3D stress distribution and damage of a composite bolted joint is *** analytical model of stress distributed on composite holes is promoted,in view of non-uniform extrusion caused by forced *** first,non-uniform extrusion of the hole edge caused by forced installation is *** to the contact state,expression of hole deformation is ***,based on Hertz theory,the maximum extrusion load is obtained with help of deformation *** constructing an elastic foundation beam model,3D stress distributed on a hole could be analyzed according to the extrusion ***,stress distribution predicted by the above analytical method is compared with that provided by FE considering composite ***,a forced installation experiment is carried out to analyze the damage distribution of the *** show that a central-symmetrically distributed stress is introduced by the hole-location *** an increment of the error,strength of composite decreases due to extrusion ***,stress presents a concave distribution on the *** the hole-location error exceeding 3%,stress decreases gradually due to failure of *** of holes does not exhibit a centrosymmetric *** damage is mainly distributed on the entrance of the hole at the lower sheet.

关键词： Hole-location error Composite joint Forced installation Stress distribution Damage

A passive source ranging method based on the frequency warping transform of the vertical intensity flux in shallow water

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Chinese Physics B 2019年第5期28卷 145-149页

作者： Yu-Bo Qi Shi-Hong Zhou Meng-Xiao Yu Shu-yuan du Mei Sun Ren-He Zhang State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences School of Physics and Electronic Engineering Taishan University

The phase of cross-correlation function of two different normal modes contains source range information, which can be extracted by warping transform due to the dispersive characteristics of the shallow water waveguide. The autocorrelation function of the received pressure or particle velocity contains both modal autocorrelation component(MAC) and modal cross-correlation component(MCC), with the former part usually treated as interference for source ranging. Because the real part of the vertical intensity flux(RPVIF) only contains MCC, a passive impulsive source ranging method based on the frequency warping transform of RPVIF with a single vector receiver in shallow water is presented. Using a waveguide-invariant-based frequency warping operator, the cross-correlation components of two different modes in the vertical intensity flux are warped into separable impulsive sequences, the time delays of which are subsequently used for source ranging. The advantages of source ranging based on warping the vertical intensity flux compared with warping the pressure autocorrelation function are pointed out, and the experiment results are also presented.

关键词： passive source ranging vertical intensity flux frequency warping transform normal mode