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A More Accurate Reconstruction Method for Detecting Large-Depth Defects in Plates Using sh.Guided Waves

Acta Mechanica Solida Sinica 2021年第2期34卷 174-183页

作者： Yihui Da Qi Li Bin Wang Dianzi liu Zhenghua Qian State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China School of Engineering University of East AngliaNorwich NR47TJUK

The inspection of thickness thinning defects and corrosion defects is greatly significant for the health prediction of plate *** main aim of this research is to propose a novel and effective approach to achieve the accurate and rapid detection of arbitrary defects using sh.ar horizontal(sh.guided waves,particularly for large-depth and complex *** proposed approach combines the quantitative detection of Fourier transform with a reference model-based strategy to improve the accuracy of large-depth defect *** the sh.llow defect profile is theoretically constructed by inverse Fourier transform of the product of reflection coefficients and integral coefficients of reference models,the unknown large-depth defect can be initially assessed using the relevant information from a predefined reference *** iteratively updating the integral coefficients of reference models,the accuracy of reconstruction of large-depth defects is much *** achieve the converged defect profile,a termination criterion,the root mean square error,is applied to guarantee the construction of defects with a high level of ***,the hybrid finite element method is used to simulate the propagation of sh.guided waves in plates for calculating the reflection coefficients of plates with ***,to demonstrate the capability of the developed reconstruction method for defect detection in terms of accuracy and efficiency,three types of large-depth defect profiles,i.e.,a rectangular flaw,a double-rectangular flaw and a complex flaw,are *** sh.w that the discrepancy between the predicted defect profile and the real one is quite small,even in the largest-depth defect case where the defect depth is equal to 0.733 times the plate thickness,the minimal difference is *** is noted that the fast convergence of the proposed approach can be achieved by no more than ten updates for the worst case.

关键词： Large-depth defect sh.guided wave Iterative strategy Reference model Hybrid FEM

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DNA Methylation of KLRC1 and KLRC3 in Autoimmune Thyroiditis:Perspective of Different Water Iodine Exposure

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Biomedical and Environmental Sciences 2024年第9期37卷 1044-1055页

作者： Yao Chen Jinjin liu Mengying Qu Bingxuan Ren Huaiyong Wu Li Zhang Zheng Zhou Lixiang liu Hongmei sh.n Disorders Control Centre for Endemic Disease ControlChinese Centre for Disease Control and PreventionHarbin Medical UniversityHarbin 150081HeilongjiangChina National Health Commission&Education Bureau of Heilongjiang Province Key Laboratory of Etiology and EpidemiologyHarbin Medical UniversityHarbin 150081HeilongjiangChina Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health Harbin Medical UniversityHarbin 150081HeilongjiangChina Division of Health Risk Factor Monitoring and Control Shanghai Municipal Center for Disease Control and PreventionShanghai 200336China Department of Public Health Administration Affiliated Hospital of Jining Medical UniversityJining 272060ShandongChina Heze Municipal Hospital Shandong Provincial Hospital Heze HospitalHeze 274700ShandongChina

Objective This study aimed to identify differentially methylated genes(DMGs) associated with natural killer cells in patients with autoimmune thyroiditis(AIT), focusing on the influence of varying water iodine exposure *** Participants were divided into categories based on median water iodine(MWI)concentrations: iodine-fortified areas(IFA, MWI 300 μg/L). A total of 176 matched AIT cases and controls were recruited and divided into 89, 40, and 47 pairs for IFA, IAA, and IEA, respectively. DMGs were identified using 850K Bead Chip analysis for 10/10 paired samples. Validation of DNA methylation and m RNA expression levels of the DMGs was conducted using Methyl Target^(TM) and QRT-PCR for 176/176paired *** KLRC1, KLRC3, and sh.D1B were identified as significant DMGs. Validation revealed that KLRC1 was hypomethylated and highly expressed, whereas KLRC3 was hypermethylated and highly expressed in individuals with AIT. Furthermore, KLRC1 was hypomethylated and highly expressed in both IFA and *** The DNA methylation status of KLRC1 and KLRC3 may play crucial roles in AIT pathogenesis. Additionally, DNA methylation of KLRC1 seems to be influenced by different iodine concentrations in water.

关键词： Autoimmune thyroiditis DNA methylation KLRC1 KLRC3 sh.D1B Iodine

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Phase/grain boundary assisted-3D static globularization mechanism of TC17 alloy based on the microstructure reconstruction and in-situ TEM observation

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Journal of Materials Science & Technology 2023年第26期157卷 246-261页

作者： Haoyu Pang Yingang liu Jiao Luo Cong Li Hong Li School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

Lamellar globularization in the dual-phase titanium alloy is the key to improving plasticity and ***,the mechanism has not been fully elucidated so *** this work,the role of phase/grain bound-ary in the static globularization of TC17 alloy was systematically studied by setting differentαphase con-tent before annealing through low-and high-temperature *** compression causes the parallel distribution and fragmentation of 3Dαplates and few globularαparticles are formed at a strain rate of 1 s^(-1).Post-deformation annealing promotes the static globularization ofαphase while it is affected by initialαphase *** 730°C deformation,the development ofα/αinterface by absorbing dislocations promotes the formation of globularαgrains based on the nucleation of sepa-ratedαparticles and pre-recoveryαsubgrain during subsequent ***α/α/βandα/β/βtriple junctions formed due to highαcontent with about 36%volume fraction are favorable for the further nucleation and growth of globularαgrains by reducing interface energy,forming a 3D irregularα*** nucleation and growth of theβphase dominate the microstructure evolution during subsequent an-nealing,resulting in the local dissolution of the plate and formation ofα*** 850°C deformation,theαphase tends to nucleate at theβ/β/βtriple junctions and grow into a lamellar sh.pe along the high energyβ/βgrain boundary due to lowαcontent with about 7%volume ***αnucleation that maintains the Burgers orientation relationsh.p(BOR)with the surroundingβphase grows along the habit plane and thickens slowly,resulting in the formation of a precipitatedαplate with a flat surface and the suppression of static *** comprehensive investigation of lamellar globularization provides guidance for optimizing the 3D microstructure and properties of dual-phase titanium alloy.

关键词： Titanium alloy Static globularization 3D microstructure Phase/grain boundary Nucleation and growth In-situ TEM heating

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sh.ar-horizontal waves in periodic layered nanostructure with both nonlocal and interface effects

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Applied Mathematics and Mechanics(English.Edition) 2020年第10期41卷 1447-1460页

作者： Ru TIAN Jinxi liu E.N.PAN Yuesh.ng WANG Institute of Engineering Mechanics Beijing Jiaotong UniversityBeijing 100044China Department of Civil Engineering University of AkronAkronOH 44325-3905U.S.A. Department of Engineering Mechanics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Hebei Key Laboratory of Mechanics of Intelligent Materials and Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China

The propagation of sh.ar-horizontal(sh.waves in the periodic layered nanocomposite is investigated by using both the nonlocal integral model and the nonlocal differential model with the interface *** on the transfer matrix method and the Bloch theory,the band structures for sh.waves with both vertical and oblique incidences to the structure are *** is found that by choosing appropriate interface parameters,the dispersion curves predicted by the nonlocal differential model with the interface effect can be tuned to be the same as those based on the nonlocal integral ***,by propagating the sh.waves vertically and obliquely to the periodic layered nanostructure,we could invert,respectively,the interface mass density and the interface sh.ar modulus,by matching the dispersion *** are further sh.wn on how to determine the interface mass density and the interface sh.ar modulus in theory.

关键词： sh.ar-horizontal(sh.wave nonlocal theory interface effect nanostructure integral model differential model

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Phylogenetic and epidemiological characteristics of H9N2 avian influenza viruses in sh.ndong Province, China from 2019 to 2021

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Journal of Integrative Agriculture 2023年第3期22卷 881-896页

作者： ZHAO Yi-ran ZHAO Yu-zhong liu Si-dang XIAO Yi-hong LI Ning liu Kui-hao MENG Fan-liang ZHAO Jun liu Meng-da LI Bao-quan College of Animal Science and Veterinary Medicine Shandong Agricultural University/Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’an 271018P.R.China Division of Zoonoses Surveillance China Animal Health and Epidemiology CenterQingdao 266033P.R.China

H9N2 avian influenza virus(AIV) has widely circulated in poultry worldwide and sporadic infections in humans and mammals. During our surveillance of chicken from 2019 to 2021 in sh.ndong Province, China, we isolated 11 H9N2AIVs. Phylogenetic analyses sh.wed that the eight gene segments of the 11 isolates were closely related to several sublineages of Eurasian lineage: BJ/94-like clades(HA and NA genes), G1-like clades(PB2 and M genes), and sh.F/98-like clades(PB1, PA, NP and NS genes). The isolates sh.wed mutation sites that preferentially bind to humanlike receptors(HA) and mammalian fitness sites(PB2, PB1 and PA), as well as mutations in antigen and drug resistance sites. Moreover, studies with mice revealed four isolates with varying levels of pathogenicity. The average antibody titer of the H9N2 AIVs was 8.60 log2. Based on our results, the epidemiological surveillance of H9N2 AIVs sh.uld be strengthened.

关键词： influenza virus phylogenetic analyses mutation sites pathogenicity antibody titer epidemiological surveillance

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SCATTERING FAR FIELD SOLUTION OF sh.WAVE BY MOVABLE RIGID CYLINDRICAL INTERFACE INCLUSION

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Acta Mechanica Solida Sinica 2002年第3期15卷 214-226页

作者： Yang Zailin liu Diankui sh. Wenpu Harbin Engn Univ Civil Engn Coll Harbin 150001 Peoples R China

The Green's function is used to solve the scattering far fieldsolution of sh.wave by a mov- able rigid cylindrical interfaceinclusion in a linear elastic body. First, a suitable Green'sfunction is devel- oped, which is the fundamental displacementsolution of an elastic half space with a movable rigid half-cylin-drical inclusion impacted by out-of-plane harmonic line source loadedat any point of its horizontal surface.

关键词： movable rigid cylindrical interface inclusion Green's function scatteringof sh.waves displacement mode of scattering wave for far field

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等离子体活化水耦合生物保鲜剂对牛肉的保鲜作用

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食品科学 2025年第2期46卷 20-29页

作者：柯志刚田玉玲刘书来周绪霞丁玉庭浙江工业大学食品科学与工程学院浙江杭州310014 浙江省全省深蓝渔业资源绿色低碳高效开发重点实验室浙江杭州310014 国家远洋水产品加工技术研发分中心(杭州) 浙江杭州310014

为延长生鲜牛肉货架期,本研究设计了一种等离子体活化水(plasma-activated water,PAW)耦合ε-聚赖氨酸盐酸盐(ε-polylysine hydrochloride,ε-PLH)、乳酸链球菌素(Nisin)的保鲜方法,并辅以六偏磷酸钠作为保水剂,探究此保鲜技术对生鲜... 详细信息

为延长生鲜牛肉货架期,本研究设计了一种等离子体活化水(plasma-activated water,PAW)耦合ε-聚赖氨酸盐酸盐(ε-polylysine hydrochloride,ε-PLH)、乳酸链球菌素(Nisin)的保鲜方法,并辅以六偏磷酸钠作为保水剂,探究此保鲜技术对生鲜牛肉的保鲜效果以及对贮藏期间品质变化的影响。结果表明,经PAW-ε-PLH-Nisin处理的牛肉经真空包装并于4℃条件下贮藏28 d后,其菌落总数为5.1(lg(CFU/g)),仍在可接受范围内;其总挥发性盐基氮值在贮藏21 d后为18.3 mg/100 g,保持在二级鲜度标准。对样品在贮藏期间的红度、质构、感官评分、硫代巴比妥酸反应物含量、脂肪酸组成、总巯基含量、羰基含量等的检测分析发现,PAW-ε-PLH-Nisin处理能显著提高牛肉红色,保持牛肉质构和感官评分的贮藏稳定性,延缓牛肉脂质和蛋白质氧化,并维持脂肪酸贮藏稳定性。以上研究表明,PAW-ε-PLH-Nisin在生鲜牛肉保鲜领域具有较高的应用潜力与开发价值。

关键词：生鲜牛肉等离子体活化水 ε-聚赖氨酸盐酸盐乳酸链球菌素保鲜

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A new extended structural compound based on saturated Wells-Dawson polyoxoanions

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Chinese Chemical Letters 2009年第11期20卷 1381-1385页

作者： Min Xu Jia liu En Bo Wang Key Laboratory of Polyoxometalate Science of Ministry of Education Institute of Polyoxometalate Chemistry Department of Chemistry Northeast Normal University Changchun Jilin 130024 China Department of Chemistry Tonghua Normal University Tonghua Jilin 134002 China

A new 3D extended structural compound, （dpdo）2H2{[Cu（2,2＇-bipy）212（P2W18O62）}.sh.O 1 （dpdo = 4,4＇-bipyridine-N,N＇- dioxide; 2,2＇-bipy = 2,2＇-bipyridine）, has been hydrothermally synthesized and characterized by elemental analyses, IR, TG analyses, cyclic voltammetry, and single-crystal X-my diffraction. Compound 1 is built up of [P2WlsO62]6- cluster as the structural motif covalently linked by [Cu（2,2＇-bipy）2]^2＋ coordination complexes to yield the 1D chains, which axe further in close contact forming a 3D supramolecular framework via aromatic π-π stacking interactions and extensive hydrogen-bonding interactions among polyoxoanions, coordinated 2,2＇-bipy organic ligands, free dpdo organic molecules and lattice water molecules.

关键词： 3D extended structures Dawson-type polyoxometalates Copper-organic complexes

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Tibetan Plateau climate dynamics: recent research progress and outlook

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National Science Review 2015年第1期2卷 100-116页

作者： Guoxiong Wu Anmin Duan Yimin liu Jiangyu Mao Rongcai Ren Qing Bao Bian He Boqi liu Wenting Hu The State Key Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences

This paper reviews progress in the study of Tibetan Plateau(TP) climate dynamics over the past *** theoretical frameworks, including thermal adaptation and the TP sensible heat(sh. driving air-pump, have been developed to identify the mechanisms responsible for the circulation anomaly produced by thermal forcing of the TP. Numerical simulations demonstrate that the thermal efects of large-scale orography, including the Tibetan and Iranian Plateaus(TIP), are crucial for the formation of the East Asian and South Asian summer monsoons(SASM) because the surface sh.of the TIP is the major driver of the water vapor transport required for the genesis of the north branch of the SASM. he large-scale orography of the TP afects the Asian climate through thermal forcing in spring and summer, and mechanical forcing in winter. he TP forcing can also inluence the Asian summer monsoon(ASM) onset over the Bay of Bengal(BOB) by enhancing the BOB warm pool at the surface and by modulating the South Asian High(SAH) in the upper troposphere. On intra-seasonal timescales, the TP thermal forcing signiicantly modulates spring rainfall in southern China and generates the biweekly oscillation of the SAH in summer. Despite climate warming, the atmospheric heat source over the TP, particularly the spring sh.exhibits a clear weakening trend from the 1980 s to 2000 s. his weakening of the spring sh.contributed to the anomalous ‘dry in the north' and ‘wet in the south' rainfall patern observed over East China. Also discussed are challenges to further understanding the mechanism of TP forcing on the multi-scale variability of the ASM.

关键词： Tibetan Plateau climate dynamics Asian monsoon land–air–sea interaction numerical simulation

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Low concentration of sodium hyaluronate temporarily elevates the tear film lipid layer thickness in dry eye patients with lipid deficiency

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International Journal of Ophthalmology(English.edition) 2018年第3期11卷 389-394页

作者： Yan Li Xuan Sang liu Yang Xiao-Ran Wang Jia-Hui liu Xiong-Jun He Ying liu Xiao-He Lu Zhi-Chong Wang State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center Sun Yat-sen University Guangzhou 510060 Guangdong Province China Department of Ophthalmology Zhujiang Hospital of Southem Medical University Guangzhou 510282 Guangdong Province China

AIM： To investigate the effects of different concentrations of artificial tears on lipid layer thickness （LLT） and blink rate （BR） in dry eye patients. METHODS： This study included 106 eyes of 58 patients with dry eye. The lipid deficiency type was defined as the LLT baseline 〈75 nm. The LLT and BR were measured at baseline and 1, 5 and 15min after the instillation of 0.1% or 0.3% sodium hyaluronate （sh. eye drops by using the LipiView ocular surface interferometer. RESULTS： In the lipid deficiency group, the LLT increased from baseline at 1rain post instillation. The LLT after the instillation of 0.1% sh.was significantly higher than that after the instillation of 0.3% sh.（P〈0.001）. The LLT returned to baseline at 15min post instillation of 0.1% sh.and at 5min post instillation of 0.3% sh. In the non-lipid deficiency group, the LLT decreased from baseline at lmin and returned to baseline at 5rain for both treatments. The BRs were not significantly different at different time points for both treatments. CONCLUSION： sh.eye drops induce a sh.rt-term increase in LLT of patients with lipid deficiency. A low concentration of artificial tears have a stronger effect than a high concentration of artificial tears on the increase in LLT. in comparison, sh.eye drops induce a transient and slight decrease in LLT of patients without lipid deficiency. A low concentration of artificial tears might be better for patients with lipid deficiency.

关键词： tear film lipid layer thickness dry eye artificialtears ocular surface interferometer sodium hyaluronate

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