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会计研究 2015年第7期 96-96,F0003页

作者： zhou hua dai deming

High-resolution Absorption Spectra of Acetylene in 142.8-152.3 nm

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Chinese Journal of Chemical Physics 2008年第5期21卷 415-420页

作者： Ya-hua Hu Chen Zhen Jing-hua dai Xiao-guo zhou Shi-lin Liu Hefei National Laboratory for Physical Sciences at Microscale Department of Chemical Physics University of Science and Technology of China Hefei 230026 China

The absorption spectra of acetylene molecules was measured under jet-cooled conditions in the wavelength range of 142.8-152.3 nm, with a tunable and highly resolved vacuum ultraviolet （VUV） laser generated by two-photon resonant four wave difference frequency mixing processes. Due to the sufficient vibrational and rotational cooling effect of the molecular beam and the higher resolution VUV laser, the observed absorption spectra exhibit more distinct spectral features than the previous works measured at room temperature. The major three vibrational bands are assigned as a C-C symmetry stretching vibrational progress （v2=0.2） of the C^1Πu state of acetylene. The observed shoulder peak at 148,2 nm is assigned to the first overtone band of the trans-bending mode V4 of the C^1Πu state of acetylene. Additionally, the two components, 4^20（μ^1Π） and 4^20（k^1Πu）, are suggested to exhibit in the present absorption spectra, due to their Renner-Teller effect and transition selection rule. All band origins and bandwidths are obtained subsequently, and it is found that bandwidths are broadened and lifetimes decrease gradually with the excitation of vibration.

关键词： Acetylene Vacuum ultraviolet Absorption spectrum

Practical Green’s function for the thermal stress field induced by a heat source in plane thermoelasticity

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Applied Mathematics and Mechanics(English Edition) 2020年第4期41卷 543-550页

作者： Jian hua Ming dai State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

The classical Green’s functions used in the literature for a heat source in a homogeneous elastic medium cannot lead to ?nite remote thermal stresses in the medium,so that they may not work well in practical thermal stress analyses. In this paper, we develop a practical Green’s function for a heat source disposed eccentrically into an elastic disk/cylinder subject to plane deformation. The edge of the disk/cylinder is assumed to be thermally permeable and traction-free. The full thermal stress ?eld induced by the heat source in the disk/cylinder is determined exactly and explicitly via the Cauchy integral techniques. In particular, a very simple formula is obtained to describe the hoop thermal stress on the edge of the disk/cylinder, which may be conveniently useful for analyzing the thermal stresses in microelectronic components.

关键词： heat source Green’s function thermal stress finite matrix

PRECONDITIONING BLOCK LANCZOS ALGORITHM FOR SOLVING SYMMETRIC EIGENVALUE PROBLEMS

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Journal of Computational Mathematics 2000年第4期18卷 365-374页

作者： hua dai Peter Lancaster Nanjing University of Aeronautics and Astronautics Naming210018China University of Calgary CalgaryCanada

A preconditioned iterative method for computing a few eigenpairs of large sparse symmetric matrices is presented in this paper. The proposed method which combines the preconditioning techniques with the efficiency of block Lanczos algorithm is suitable for determination of the extreme eigenvalues as well as their multiplicities. The global convergence and the asymptotically quadratic convergence of the new method are also demonstrated. [ABSTRACT FROM AUTHOR]

关键词： eigenvalue eigenvector sparse matrices Lanczos method preconditioning

Impacts of external forcing and internal variability on the North Atlantic multidecadal variations since 1950

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Science China Earth Sciences 2024年第8期67卷 2699-2701页

作者： Wenjian hua Aiguo dai Key Laboratory of Meteorological Disaster Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China Department of Atmospheric and Environmental Sciences University at AlbanyState University of New YorkAlbany 12222USA

The physical formation mechanisms of the Atlantic Multidecadal Variability(AMV)in the context of global warming have been a key research topic(Vecchi et al.,2017).The conventional view is that the AMV is mainly driven by internal dynamics within the climate system,especially in the Atlantic Ocean(Zhang et al.,2019).However,some studies suggest that decadal to multidecadal variations in North Atlantic sea surface temperature(SST)since around 1950 are related to anthropogenic and natural aerosol emissions(Otter?et al.,2010;Booth et al.,2012;hua et al.,2019).

关键词： Atlantic decadal forcing

A New Steroidal Glycoside from Ophiopogon japonicus （Thunb.） Ker-Gawl.

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Journal of Integrative Plant Biology 2005年第9期47卷 1148-1152页

作者： Hao-Fu dai Shi-Ming DENG Ning-hua TAN Jun zhou State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany the Chinese Academy of Sciences Kunming 650204 China

To study the chemical constituents from traditional Chinese herb Ophiopogon japonicus （Thunb.） Ker-Gawl., a new steroidal glycoside, named ophiopojaponin C （1）, together with two known ones, was isolated by column chromatography. Spectroscopic and chemical evidence revealed the structures to be ophiopogenin 3-O-[α-L-rhamnopyranosyl（1→2）]-β-D-xylopyranosyl（1→4）-β-D-glucopyranoside （1）, diosgenin 3-O-[2-O-acetyl-α-L-rhamnopyranosyl（1→2）]-β-D-xylopyranosyl（1→3）-β-D-glucopyranoside （2）, and ruscogenin 1-O-[2-O-acetyl-α-L-rhamnopyranosyl（1→2）]-β-D-xylopyranosyl（1→3）-β-D-fucopyranoside （3）.

关键词： C27 steroidal glycosides Liliaceae Ophiopogonjaponicus.

Conservative Evolution of Hepatitis B Virus Precore and Core Gene During Immune Tolerant Phase in Intrafamilial Transmission

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Virologica Sinica 2020年第4期35卷 388-397页

作者： Yuqian Luo Le Zhang Yimin dai Yali Hu Biyun Xu Yi-hua zhou Department of Laboratory Medicine Nanjing Drum Tower Hospital and Jiangsu Key Laboratory for Molecular MedicineNanjing University Medical SchoolNanjing 210008China Department of Obstetrics and Gynecology Nanjing Drum Tower HospitalNanjing University Medical SchoolNanjing 210008China Department of Biostatistics Nanjing Drum Tower HospitalNanjing University Medical SchoolNanjing 210008China Department of Infectious Diseases Nanjing Drum Tower HospitalNanjing Medical UniversityNanjing 210008China

Hepatitis B virus(HBV)is characterized with high mutations,which is attributed to the lack of proof-reading of the viral reverse transcriptase and host immune *** this study,31 HBV chronic carriers from 14 families were enrolled to investigate the evolution of the same original HBV sources in different *** of pre-C and C(pre-C/C)genes were analyzed in eight pairs of HBV-infected mothers with longitudinal sera(at an interval of 6.0–7.2 years)and their children(5.5–6.7 years old),and in 15 adults(21–78 years old)from six families with known intrafamilial HBV *** pre-C/C sequences had almost no change in eight mothers during 6.0–7.2 years and their children who were in immune tolerant *** pre-C/C sequences from the 15 adults of six families,mostly in the immune-clearance phase or the low replicative phase,showed various diversified mutations between individuals from each *** to a reference stain(GQ205441)isolated nearby,the pre-C/C in individuals in immune tolerant phase showed 98.56%–99.52%homology at nucleotide level and 99.5%–100%homology at amino acid *** contrast,multiple mutations were developed in the immune-clearance phase or the low replicative phase,affecting immune epitopes in core gene and G1896 in pre-C *** results indicate that the evolution of new HBV variants is not mainly resulted from the spontaneous error rate of viral reverse transcription,but from the host immune pressure.

关键词： Hepatitis B virus(HBV) Pre-C/C gene Sequence evolution

Spatial Distribution and Ecological Risk Assessment of Heavy Metals in Surface Sediment of Songhua River,Northeast China

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Chinese Geographical Science 2021年第2期31卷 223-233页

作者： LIU Baolin DONG deming hua Xiuyi DONG Weihua LI Ming Key Laboratory of Groundwater Resources and Environment of Ministry of Education College of New Energy and EnvironmentJilin UniversityChangchun 130012China College of Chemistry Changchun Normal UniversityChangchun 130032China College of Urban and Environmental Science Changchun Normal UniversityChangchun 130032China Key Laboratory of Songliao Aquatic Environment Ministry of EducationSchool of Civil and Environmental EngineeringJilin Jianzhu UniversityChangchun 130118China

The Songhua River,one of the seven major rivers in China,locates in Northeast China with 1897 km *** study aims to investigate the concentrations,distribution,source apportionment and ecological risk assessment of heavy metals including copper(Cu),zinc(Zn),cadmium(Cd),lead(Pb),nickel(Ni)and chromium(Cr)in main stream and tributaries of the Songhua River in Jilin Province,Northeast *** sediment samples(0–15 cm)were collected from 39 sampling sites in the Songhua River in July *** of Cu,Zn,Cd,Pb,Ni and Cr were *** mean concentrations of heavy metals were(24.0±9.2)mg/kg,(59.3±18.0)mg/kg,(4.0±2.1)mg/kg,(39.0±27.9)mg/kg,(18.5±8.6)mg/kg and(56.1±17.6)mg/kg for Cu,Zn,Cd,Pb,Cr and Ni,*** average contents of Cu,Cd,Pb,Cr and Ni were higher than their background *** concentrations of heavy metals were found in the lower reaches with industrial enterprises and cities along the Songhua ***,Pb and Ni might come from industrial sewage and mineral processing,while Cu and Cd were derived from electroplating wastewater and agricultural non-point source *** originated from lithogenic *** concentrations of Cu,Zn and Cr were below the effect range low(ERL)at all sites,while Cd,Pb and Ni concentrations were detected ranging from ERL to the effect range median(ERM)at more than 15%of *** of Ni exceeded ERM in more than 50%of *** mean toxic units of heavy metals in the Songhua River decreased following the order:Cd(6.7)>Pb(2.2)>Ni(1.6)>Cu(0.7)>Cr(0.5)=Zn(0.5).Potential ecological risk index was found to be higher in middle and lower reaches of the Songhua River,where Cd could impose an extremely high ecological risk.

关键词： heavy metals surface sediment ecological risk assessment Songhua River Northeast China

GENERALIZED CONJUGATE A-ORTHOGONAL RESIDUAL SQUARED METHOD FOR COMPLEX NON-HERMITIAN LINEAR SYSTEMS

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Journal of Computational Mathematics 2014年第3期32卷 248-265页

作者： Jianhua Zhang hua dai Department of Mathematics Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Mathematics Anhui Science and Technology University Fengyang 233100 China Department of Mathematics Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

Recently numerous numerical experiments on realistic calculation have shown that the conjugate A-orthogonal residual squared （CORS） method is often competitive with other popular methods. However, the CORS method, like the CGS method, shows irreg- ular convergence, especially appears large intermediate residual norm, which may lead to worse approximate solutions and slower convergence rate. In this paper, we present a new product-type method for solving complex non-Hermitian linear systems based on the bicon- jugate A-orthogonal residual （BiCOR） method, where one of the polynomials is a BiCOR polynomial, and the other is a BiCOR polynomial with the same degree corresponding to different initial residual. Numerical examples are given to illustrate the effectiveness of the proposed method.

关键词： Krylov subspace BiCOR method CORS method Complex non-Hermitianlinear systems.

Label-free quantitative proteomics reveals fibrinopeptide B and heparin cofactorⅡas potential serum biomarkers in respiratory syncytial virus-infected mice treated with Qingfei oral liquid formula

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Chinese Journal of Natural Medicines 2018年第4期16卷 241-251页

作者： zhou Li-hua XU Jian-Ya dai Chen FAN Yi-Man YUAN Bin Jiangsu Key Laboratory of Pediatric Respiratory Disease Nanjing University of Chinese MedicineNanjing 210023China College of Medicine and Life Sciences Nanjing University of Chinese MedicineNanjing 210023China Experimental Teaching Center of Life Science Nanjing Agrieultural UniversityNanjing 210095China Department of Pediatrics Jiangsu Province Hospital of Chinese Medicine Affiliated Hospital of Nanjing University of Chinese

Respiratory syncytial virus(RSV) is a leading cause of acute lower respiratory tract infections. Qingfei oral liquid(QFOL), a traditional Chinese medicine, is widely used in clinical treatment for RSV-induced pneumonia. The present study was designed to reveal the potential targets and mechanism of action for QFOL by exploring its influence on the host cellular network following RSV infection. We investigated the serum proteomic changes and potential biomarkers in an RSV-infected mouse pneumonia model treated with QFOL. Eighteen BALB/c mice were randomly divided into three groups: RSV pneumonia model group(M), QFOL-treated group(Q) and the control group(C). Serum proteomes were analyzed and compared using a label-free quantitative LC-MS/MS approach. A total of 172 protein groups, 1009 proteins, and 1073 unique peptides were successfully identified. 51 differentially expressed proteins(DEPs) were identified(15 DEPs when M/C and 43 DEPs when Q/M; 7 DEPs in common). Classification and interaction network showed that these proteins participated in various biological processes including immune response, blood coagulation, complement activation, and so forth. Particularly, fibrinopeptide B(FpB) and heparin cofactor Ⅱ(HCII) were evaluated as important nodes in the interaction network, which was closely involved in coagulation and inflammation. Further, the Fp B level was increased in Group M but decreased in Group Q, while the HCII level exhibited the opposite trend. These findings not only indicated FpB and HCII as potential biomarkers and targets of QFOL in the treatment of RSV pneumonia, but also suggested a regulatory role of QFOL in the RSV-induced disturbance of coagulation and inflammation-coagulation interactions.

关键词： Qingfei oral liquid Respiratory syncytial virus-infected mouse pneumonia model Label-free quantitative proteomics Potential serum biomarkers RSV-host interaction network