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Simulation of Horizontal-Two-Dimension Focused Waves Using A Two-Layer Boussinesq-Type Model

China Ocean Engineering 2023年第5期37卷 725-737页

作者： ZOU wen-feng WANG Ping LIU Zhong-bo FANG Ke-zhao sun Jia-wen ZHANG Ning-chuan Key Laboratory of coastal and offshore engineering Dalian University of TechnologyDalian 116024China State Environmental Protection Key Laboratory of Marine Ecosystem Restoration National Marine Environmental Monitoring CenterDalian 116023China Dalian Maritime University College of Transportation EngineeringDalian 116024China

Accurate simulation of the horizontal-two-dimension(H2D)focused wave group in deep water requires high accuracy of a numerical *** two-layer Boussinesq-type model(Liu and Fang,2016;Liu et al.,2018)with the highest spatial derivative of 2 has high accuracy in both linear and nonlinear *** on the further development of the velocity equations(Liu et al.,2023),the H2D numerical model for water waves is established with the prediction-correction-iteration model in the finite difference method,and a composite fourth-order Adams-Bashforth-Moulton scheme is used for time *** wave generation method proposed by Hsiao et al.(2005)is applied and calibrated in this H2D *** numerical calculations lead to the following three main conclusions:First,compared with the analytical solution of Stokes linear waves,the calculated velocity profiles show higher accuracy by using the improved velocity ***,the simulations of the focused multidirectional wave group are carried out,and good agreements are found,demonstrating that the present H2D numerical model shows high accuracy in simulating focused multidirectional wave groups,and the effectiveness of the improved velocity formulas is also ***,the velocity profiles throughout the computational domain at the time of maximum wave crest are ***,the FFT method is used to obtain the amplitude with different frequencies for several locations,and the changes of the wavelet energy spectrum at different locations are presented for several cases.

关键词： focused wave horizontal-two-dimension model finite difference method nonlinear property

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Efficient Syntheses of 2-Substituted Benzimidazoles and Benzoxazoles from β-Keto Esters

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Chemical Research in Chinese Universities 2011年第2期27卷 228-231页

作者： XIAO Li-wei ZHANG Min sun wen-hua Faculty of Chemistry and Material Science Langfang Teachers College Langfang 065000 P. R. China Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

An efficient synthetic method was developed to synthesize 2-substituted benzimidazoles and benzo- xazoles with β-keto esters as starting materials under mild reaction conditions, during which other functional groups ... 详细信息

关键词： Benzimidazole Benzoxazole β-Keto ester

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Mapping Properties of Certain Oscillatory Integrals on Modulation Spaces

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Acta Mathematica Sinica,English Series 2017年第12期33卷 1647-1658页

作者： Mei Fang CHENG Hui Hui LIU Ai wen sun School of Mathematical and Computer Sciences Anhui Normal University Wuhu 241002 P. R. China

Suppose β1 〉 α1 ≥ 0, β2 〉 α2 ≥ 0 and （k,j） ∈ R^2. In this paper, we mainly investigate the mapping properties of the operator Tα,βf（x,y,z）=∫Q^2f（x-t,y-s,z-t^ks^j）e^-2πit-β1s-β2t^-1-α1s^-1-α2 dtd... 详细信息

关键词： Modulation space singular integral operator Wiener amalgam space

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Effect of Enhanced Plasma Density on the Properties of Aluminium Doped Zinc Oxide Thin Films Produced by DC Magnetron Sputtering

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Journal of Materials Science & Technology 2011年第5期27卷 393-397页

作者： Jun Gong Xiaobo Zhang Zhiliang Pei Chao sun Lishi wen Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Aluminum doped zinc oxide （AZO） thin films were prepared by DC magnetron sputtering at low substrate temperature. A coaxial solenoid coil was placed near the magnetron target to enhance the plasma density （Ji）. The enhanced plasma density improved significantly the bulk resistivity （p） and its homogeneity in spatial distribution of AZO films. X-ray diffraction （XRD） analysis revealed that the increased Ji had influenced the crystallinity, stress relaxation and other material properties. The AZO films deposited in low plasma density （LPD） mode showed marked variation in p （ranging from -6.5x10-2 to 1.9x10-3 Ω.cm）, whereas those deposited in high plasma density （HPD） mode showed a better homogeneity of films resistivity （ranging from ~1.3x10-3 to 3.3x10-3 ~.cm） at different substrate positions. The average visible transmittance in the wavelength range of 500-800 nm was over 80%, irrespective of the deposition conditions. The atomic force microscopy （AFM） surface morphology showed that AZO films deposited in HPD mode were smoother than that in LPD mode. The high plasma density produced by the coaxial solenoid coil improved the electrical property, surface morphology and the homogeneity in spatial distribution of AZO films deposited at low substrate temperature.

关键词： Sputtering Electronic conductivity Ion bombardmentPlasma density

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Synthesis and Crystal Structure of an Ion-pair Supramolecular Associate 2,9-Diformyl-1,10-phenanthrolinebis-(2,6-dimethylanil)cobalt(Ⅱ) Perchlorate

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Chinese Journal of Structural Chemistry 2006年第7期25卷 861-865页

作者： LI Gang JIE Su-Yun TANG Ning sun wen-Hua State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China Key Laboratory of Engineering Plastics Institute of Chemistry The Chinese Academy of Sciences Beijing 100080 China

2,9-Diformyl-l, 10-phenanthrolinebis（2,6-dimethylanil）cobalt（Ⅱ） perchlorate was synthesized and demonstrated to be [COL2][ClO4]2 by X-ray diffraction analysis. It crystallizes in the monoclinic system, space group C2/c with a = 22.294（4）, b = 15.122（3）, c = 20.640（4） A, β = 119.618（4）°, V = 6048.9（19） A^3, C63H52Cl2CoN9O9, Mr= 1208.97, F（000） = 2504, De= 1.328g/cm^3, Z = 4, μ= 0.436, the final R = 0.0712 and wR = 0.1718 for 1734 observed reflections （I 〉 2σ（I））. In its solid state the helical polymeric chains are supramolecularly associated through intermolecular and interionic hydrogen bonding interactions.

关键词： 1,10-phenanthroline cobalt complex crystal structure hydrogen bond

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Liraglutide Suppresses Myocardial Fibrosis Progression by Inhibiting the Smad Signaling Pathway

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Current Medical Science 2023年第5期43卷 955-960页

作者： wen sun Hong MI De-ying HE wen LI Yi-yan SONGYANG Department of Geriatrics Chongqing Hospital of Traditional Chinese MedicineChongqing 400021China Department of Traditional Chinese Medicine Chongqing Hospital of Traditional Chinese MedicineChongqing 400021China Department of Emergency Renmin Hospital of Wuhan UniversityWuhan 430060China Department of Pharmacy Renmin Hospital of Wuhan UniversityWuhan 430060China

Objective Liraglutide is a commonly used hypoglycemic agent in clinical practice,and has been demonstrated to have protective effects against the development of cardiovascular ***,its potential role in myocardial fibrosis remains *** present study aims to assess the impact of liraglutide on the activation of cardiac *** Primary rat adult fibroblasts were isolated,cultured,and randomly allocated into 4 groups:control group,transforming growth factor beta1(TGFβ1)stimulation group,liraglutide group,and TGFβ1+liraglutide *** activation was induced by TGFβ*** proliferation activity was assessed using the CKK-8 kit,and cellular activity was determined using the MTT *** transcrition-quantitative polymerase chain reaction(RT-qPCR)was utilized to quantify the level of collagen transcription,immunofluorescence staining was performed to detect the expression level of type III collagen andα-smooth muscle protein(α-SMA),and immunoblotting was conducted to monitor alterations in signal *** The addition of 10,25,50 and 100 nmol/L of liraglutide did not induce any significant impact on the viability of fibroblasts(P>0.05).The rate of cellular proliferation was significantly higher in the TGFβl stimulation group than in the control ***,the treatment with 50 and 100 nmol/L of liraglutide resulted in the reduction of TGFβl-induced cell proliferation(P<0.05).The RT-qPCR results revealed that the transcription levels of type I collagen,type III collagen,andα-SMA were significantly upregulated in the TGFβl stimulation group,when compared to the control group(P<0.05).However,the expression levels of these aforementioned factors significantly decreased in the TGFβl+liraglutide group(P<0.05).The immunofluorescence staining results revealed a significant increase in the expression levels of type III collagen andα-SMA in the TGFβl stimulation group,when compared to the control group(P<0.05).However,these exp

关键词： liraglutide myocardial fibrosis TGFβl smad

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Design and investigation of dopingless double-gate line tunneling transistor: Analog performance, linearity, and harmonic distortion analysis

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Chinese Physics B 2020年第10期29卷 556-565页

作者： Hui-Fang Xu Xin-Feng Han wen sun Institute of Electrical and Electronic Engineering Anhui Science and Technology UniversityFengyang 233100China

The tunnel field-effect transistor (TFET) is proposed by using the advantages of dopingless and line-tunneling technology. The line tunneling is created due to the fact that the gate electric field is aligned with the tunneling direction, which dramatically enhances tunneling area and tunneling current. Moreover, the effects of the structure parameters such as the length between top gate and source electrode, the length between top gate and drain electrode, the distance between bottom gate and drain electrode, and the metal position on the on-state current, electric field and energy band are investigated and optimized. In addition, analog/radio-frequency performance and linearity characteristics are studied. All results demonstrate that the proposed device not only enhances the on/of current ratio and reduces the subthreshold swing, but also offers eight times improvement in cut-off frequency and gain band product as compared with the conventional point tunneling dopingless TFET, at the same time;it shows better linearity and small distortions. This proposed device greatly enhances the potential of applications in dopingless TFET.

关键词： dopingless tunnel field effect transistor line tunneling lincarity parameters

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Overview of ferroptosis and pyroptosis in acute liver failure

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World Journal of Gastroenterology 2024年第34期30卷 3856-3861页

作者： Ya-wen sun Bo-wen Zhao Hai-Fang Li Guang-Xiao Zhang College of Life Sciences Shandong Agricultural UniversityTai’an 271018Shandong ProvinceChina

In this editorial,we comment on the article by Zhou et al published in a recent *** specifically focus on the crucial roles of ferroptosis and pyroptosis in acute liver failure(ALF),a disease with high mortality *** is the result of increased intracellular reactive oxygen species due to iron accumulation,glutathione(GSH)depletion,and decreased GSH peroxidase 4 activity,while pyroptosis is a procedural cell death mediated by gasdermin D which initiates a sustained inflammatory *** this review,we describe the characteristics of ferroptosis and pyroptosis,and discuss the involvement of the two cell death modes in the onset and development of ***,we summarize several interfering methods from the perspective of ferroptosis and pyroptosis for the alleviation of *** observations might provide new targets and a theoretical basis for the treatment of ALF,which are also crucial for improving the prognosis of patients with ALF.

关键词： Acute liver failure Ferroptosis Pyroptosis Glutathione peroxidase 4 Gasdermin D

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A review of combined phacoemulsification and endoscopic cyclophotocoagulation:efficacy and safety

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International Journal of Ophthalmology(English edition) 2018年第8期11卷 1396-1402页

作者： wen sun Chen-Ying Yu Jian-Ping Tong Department of Ophthalmology the First Affiliated HospitalCollege of MedicineZhejiang University

As cataract occurs frequently in patients with glaucoma, combining phacoemulsification and endoscopic cyclophotocoagulation has been gaining attention recently due to its minimally invasive nature. A variety of studies had evaluated the efficacy and safety of this procedure and had shown extremely promising results. This review article has shown here that combined phacoemulsification and endoscopic cyclophotocoagulation procedure could effectively reduce intraocular pressure in medically uncontrolled glaucoma patients while avoiding serious complications associated with traditional cyclophotocoagulation procedure and adverse effects related to filtering surgery such as trabeculectomy.

关键词： endoscopic cyclophotocoagulation phacoemulsification glaucoma

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Research on Concrete Beam Crack Recognition Algorithm Based on Block Threshold Value Image Processing

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Structural Durability & Health Monitoring 2020年第4期14卷 355-374页

作者： wenting Qiao Xiaoguang Wu wen sun Qiande Wu School of Highway Chang'an UniversityXi'an710064China Iner Mongolia Transport Construction Engineering Quality Supervision Bureau Hohhot010020China Jiangsu Fasten Matenial Analysis and Inspecting Co LtdJiangyin214446China School of Civil Engineering Southeast UniversityNanjing210000China

To solve the problem that the digital image recognition accuracy of concrete structure cracks is not high under the condition of uneven ill umination and complex surface color of concrete structure,this paper has proposed a block segmentation method of maximum entropy threshold based on the digital image data obtained by the ACTIS automatic detection *** steps in this research are as follows:*** crack digital images of concrete specimens with typical fea-tures were collected by using the Actis system of KURABO Co,Ltd,of Japan in the concrete beam bending *** images are segmented into blocks to dis-tinguish backgrounds of different *** max imum interclass average gray difference method is used to distinguish the sub-blocks and screen out the image blocks that need to be *** is made to the image with 2D max imum entropy threshold segmentation method to obtain the binary image,and the target image can be obtained by screening the connected domain features of the binary *** have shown that compared with other algo-rithms,the proposed method can effectively decrease the image over-segmentation and under segmentation rates,highlight the characteristics of the target cracks,solve the problems of excessive difference between the identified length and actual length of cracks caused by background gray level change and uneven ilumnination,and effectively improve the recognition accuracy of bridge concrete cracks.

关键词： Concrete crack block segmentation maximum entropy segmentation algorithms maximum interclass variance(Otsu)method

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