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On the properties of the Rational Function Spectrum describing waves near islands and reefs in South China Sea

Journal of Hydrodynamics 2021年第5期33卷 879-888页

作者： Yi-geng Wang Zhi Zong Li Zhou xiao-long liu Xue-kang Gu School of Naval Architecture Dalian University of TechnologyDalian 116024China China Ship Scientific Research Center Wuxi 214082China

On-site measurements show that water waves near islands and reefs in South China Sea exhibit different properties of wave energy distributions with regard to wave frequencies,among which the most prominent factor is the interplay of swells arising from the West Pacific Ocean and the local wind *** also show that the breaking waves continuously appear,containing more energy in high frequency components,and the nonlinear characteristics of the waves are important in adjusting the energy *** properties may explain the large discrepancies between the well-accepted wave spectra(for example the P-M spectrum,Neumann spectrum,ITTC spectrum etc.)and the measured wave spectra near islands and reefs in South China ***,a new Rational Function Spectrum is proposed in this paper to describe waves near islands and reefs which turns out to show satisfactory *** well captures wave power distributions in the form of single and double peaks,at low-and high-frequency regions,as well as nonlinear scale power *** on the investigation of the measured data near an island in South China Sea,the relation between the parameters used in the Rational Function Spectrum and the statistical parameters of water waves(significant wave height and wave period)is *** is noted that the wave properties at low-and high-frequencies are controlled by the local wind velocities at the wave growth stage,but remain constant at the wave decay *** parameter peak frequency is only dependent on the wave period corresponding to the maximum wave *** parameter spectral peak is determined from the wave height and the wave *** relations help to clarify the physical meanings of the parameters used in the Rational Function Spectrum,and thus provide an alternative spectral form to describe random waves near islands and reefs.

关键词： Rational Function Spectrum double peak near islands and reefs swell nonlinear

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Effect of fibulin-5 on adhesion, migration and invasion of hepatocellular carcinoma cells via an integrin-dependent mechanism

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World Journal of Gastroenterology 2015年第39期21卷 11127-11140页

作者： Jia-Cheng Tang Jing-Hua liu xiao-long liu xiao Liang Xiu-Jun Cai Key Lab of Surgery of Zhejiang Province Sir Run Run Shaw Hospital Zhejiang University

AIM: To elucidate the role of fibulin-5(FBLN-5) as a suppressor of hepatocellular carcinoma(HCC) cell metastasis via ***: The expression of FBLN-5 was determined by immunohistochemistry in 140 HCC samples and matched normal tissues, and was further confirmed by RT-PCR and Western blot analyses in various cell lines. Recombinant FBLN-5 was expressed in Escherichia coli BL21(DE3), purified and used in cell attachment assays. Expression of a specific plasmid or a specific si RNA in HCC cells resulted in the overexpression or knockdown of FBLN-5, respectively. Further, the migration and invasion of HCC cells were investigated using the Boyden chamber and transwell assays. The concentration of secreted matrix metalloproteinase 7(MMP-7) was determined using ELISA. RESULTS: FBLN-5 expression was found to be downregulated in HCC. Its expression was significantly correlated with advanced tumor metastasis; this was indicative of poor 5-year overall survival. Recombinant full-length human FBLN-5 promoted the attachment of HCC cells via integrins: it inhibited HCC cell adhesionand migration to fibronectin in a concentrationdependent manner. It also inhibited HCC cell migration and invasion through an integrin-binding arginineglycine-aspartic acid(RGD) motif by downregulating MMP-7. CONCLUSION: These results suggest that lower FBLN-5 expression is an important indicator of poor survival and that FBLN-5 inhibits HCC motility via an integrin-dependent mechanism. RGD-dependent suppression of MMP-7 by FBLN-5 might contribute to the development of new therapeutic strategies for HCC.

关键词： Fibulin-5 Hepatocellular carcinoma Integrin Adhesi

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Observation and simulation of wind waves near a typical reef lagoon in South China Sea

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Journal of Hydrodynamics 2021年第1期33卷 24-32页

作者： Ze Sun Dao-lin Xu xiao-long liu Hai-cheng Zhang Zhi-wen Cai China Ship Scientific Research Center Wuxi 214082China Centre for Marine Technology Hunan UniversityChangsha 410082China Southern Marine Science and Engineering Guangdong Laboratory Zhanjiang 524025China

Due to the inference of the uneven shallow water seabed and the surrounding islands,the wind-generated waves around or in a reef lagoon are rather complicated,and critical to the safety of floating structures deployed near islands or inside a *** paper aims to find a feasible analysis tool for the wave simulations near islands and *** proposed three methods of grid techniques of WAVEWATCH III(WW3)are assessed by using on-site measured data which was collected and accumulated for about 5 years since August 2014 by a wave observation system deployed inside and outside a reef lagoon in South China *** the assessments,the wave statistics including the correlation coefficients,root mean square errors,and their variances are used to quantify the precisions of the simulation results of the significant wave heights,mean wave periods,and peak wave directions at two *** the three methods,the Multi-scale Zone and Multi-scale grid Technique(MZMGT)established on unstructured triangular grids exhibits better results in terms of the accuracy and CPU *** addition,the bimodal feature of wave spectra was observed at both sites of the reef lagoon in different typhoon *** wave characteristics inside the reef lagoon and open sea are also analyzed.

关键词： Wave simulation reef lagoon WAVEWATCH III(WW3) grid methods typhoon waves on-site measurements

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The characteristics of waves around an entrance of a lagoon in South China Sea

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Journal of Hydrodynamics 2021年第5期33卷 889-900页

作者： Zhi-wen Cai Chun-rong He xiao-long liu Wen-wei Chen Ze Sun Jun Ding China Ship Scientific Research Center Wuxi 214082China Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang) 524000China

The characteristics of the waves around a lagoon entrance in South China Sea were observed during the past one and half years based on the wave *** measured results show that the monsoon plays an important *** summer,waves mostly come from the southeast,among which the wave components of non-dimensional periods larger than 0.2 are fetch-trapped *** winter the waves may be divided into two groups,the fetch-trapped waves and the waves from the open *** skewness of the directional distribution functions is within+8 around *** power relationship between the direction spread and kurtosis is also ***,it is found that the waves with the significant wave heights greater than 1.5 m are caused by typhoons or cold *** frequency components of wave energy driven by cold air appear in the high frequency range at first,and change to the lower frequency range *** waves driven by typhoon mostly come from the open sea.

关键词： Reef lagoon cold air typhoon waves South China Sea Introduction

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Preparation and high-frequency soft magnetic property of FeCo-based thin films

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Rare Metals 2016年第10期35卷 742-746页

作者： xiao-long liu Lai-Sen Wang Qin Luo Lei Xu Bei-Bei Yuan Dong-Liang Peng Fujian Key Laboratory of Advanced Materials College of MaterialsXiamen University

A series of FeCo-based thin films were pre- pared by magnetron sputtering without applying an induced magnetic field. The microstructure, electrical properties, magnetic properties and thermal stability of FeCo, FeCoSiN monolayer thin film and [FeCoSiN/SiNx]n multilayer thin film were investigated systematically. When FeCo thin film was doped with Si and N, the resis- tivity and soft magnetic properties of the obtained FeCo- SiN thin film can be improved effectively. The coercivity （He）, resistivity （p） and ferromagnetic resonance frequency （fr） can be further optimized for the [FeCoSiN/SiNx]n multilayer thin film. When the thickness of FeCoSiN layer and SiNx layer is maintained at 7 and 2 nm, the He, p andfr for [FeCoSiN/SiNx]n multilayer thin film are 225 A·m^-1 392 μΩ·cm^-1 and 4.29 GHz, respectively. In addition, the low coercivity of easy axis （Hoe ≈ 506 A·m^-1） of [FeCoSiN/SiNx]n multilayer thin film can be maintained after annealing at 300℃ in air for 2 h.

关键词： Magnetic films High-frequency Soft magnetic Thermal stability

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Thickness-modulated in-plane Bi2O2Se homojunctions for ultrafast high-performance photodetectors

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Chinese Physics B 2019年第12期28卷 363-369页

作者： Cheng-Yun Hong Gang-Feng Huang Wen-Wen Yao Jia-Jun Deng xiao-long liu Renewable Energy School North China Electric Power UniversityBeijing 102206China Department of Mathematics and Physics North China Electric Power UniversityBeijing 102206China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources and Beijing Key Laboratory of Energy Safety and Clean Utilization North China Electric Power UniversityBeijing 102206China

Bi2O2Se thin film could be one of the promising material candidates for the next-generation electronic and optoelectronic applications. However, the performance of Bi2O2Se thin film-based device is not fully explored in the photodetecting area. Considering the fact that the electrical properties such as carrier mobility, work function, and energy band structure of Bi2O2Se are thickness-dependent, the in-plane Bi2O2Se homojunctions consisting of layers with different thicknesses are successfully synthesized by the chemical vapor deposition(CVD) method across the terraces on the mica substrates,where terraces are created in the mica surface layer peeling off process. In this way, effective internal electrical fields are built up along the Bi2O2Se homojunctions, exhibiting diode-like rectification behavior with an on/off ratio of 102, what is more, thus obtained photodetectors possess highly sensitive and ultrafast features, with a maximum photoresponsivity of 2.5 A/W and a lifetime of 4.8 μs. Comparing with the Bi2O2Se uniform thin films, the photo-electric conversion efficiency is greatly improved for the in-plane homojunctions.

关键词： Bi2O2Se in-plane homojunction thickness modulation photodetectors

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A Cauchy integral formula for(p,q)-monogenic functions withα-weight

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Applied Mathematics(A Journal of Chinese Universities) 2024年第3期39卷 545-553页

作者： GAO long DU xiao-jing liu Yue XIE Yong-hong School of Mathematical Sciences Hebei Normal UniversityShijiazhuang 050024China

Firstly,some properties for(p,q)-monogenic functions withα-weight in Clifford analysis are ***,the Cauchy-Pompeiu formula is ***,the Cauchy integral formula and the Cauchy integral theorem for(p,q)-monogenic function... 详细信息

关键词： (p q)-monogenic functions with-weight Cauchy-Pompeiu formula Cauchy integral formula Cauchy integral theorem

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Regulation of a vacuolar proton-pumping P-ATPase MdPH5 by MdMYB73 and its role in malate accumulation and vacuolar acidification

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aBIOTECH 2023年第4期4卷 303-314页

作者： xiao-Yu Huang Ying Xiang Yu-Wen Zhao Chu-Kun Wang Jia-Hui Wang Wen-Yan Wang xiao-long liu Quan Sun Da-Gang Hu National Research Center for Apple Engineering and Technology Shandong Collaborative Innovation Center of Fruit and Vegetable Quality and Efficient ProductionCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’an 271018ShandongChina

As the main organic acid in fruits,malate is produced in the cytoplasm and is then transported into the *** accumulates by vacuolar proton pumps,transporters,and channels,affecting the taste and flavor of *** the three types of proton pumps(V-ATPases,V-PPases,and P-ATPases),the P-ATPases play an important role in the transport of malate into *** this study,the transcriptome data,collected at different stages after blooming and during storage,were analyzed and the results demonstrated that the expression of MdPH5,a vacuolar proton-pumping P-ATPase,was associated with both pre-and post-harvest malate ***,MdPH5 is localized at the tonoplast and regulates malate accumulation and vacuolar *** addition,MdMYB73,an upstream MYB transcription factor of MdPH5,directly binds to its promoter,thereby transcriptionally activating its expression and enhancing its *** this way,MdMYB73 can also affect malate accumulation and vacuolar ***,this study clarifies how MdMYB73 and MdPH5 act to regulate vacuolar malate transport systems,thereby affecting malate accumulation and vacuolar pH.

关键词： Apple Malate accumulation P-ATPase MdPH5 MdMYB73

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A direct coupling analysis method of hydroelastic responses of VLFS in complicated ocean geographical environment

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Journal of Hydrodynamics 2019年第3期31卷 582-593页

作者： Jun Ding You-sheng Wu Ye Zhou Zhi-wei Li Chao Tian Xue-feng Wang Zheng-wei Zhang xiao-long liu China Ship Scientific Research Center Wuxi 214082 China School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai 200240 China

In this paper a direct coupling analysis method (DCAM) of hydroelastic responses of a very large floating structures (VLFS) in complicated geographical environment is presented. In this method the three-dimensional hydroelasticity theory of floating bodies is combined with the shallow water wave theory, to allow for proper description of the influence of uneven seabed and sheltering effect of islands on the hydroelastic responses of a VLFS deployed near island and reefs in shallow sea. This method and the numerical procedures were verified and validated by comparison-between the predictions and the model test results of a 3-module VLFS and an 8-module VLFS in two simulated shallow sea regions with different seabed topography.

关键词： Direct coupling analysis method very large floating structure (VLFS) hydroeiasticity complicated environment

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High-Temperature Stability of Mg-1Al-12Y Alloy Containing LPSO Phase and Mechanism of Its Portevin-Le Chatelier(PLC)Effect

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 982-998页

作者： Qian-long Ren Shuai Yuan Shi-Yu Luan Jin-Hui Wang xiao-Wei Li xiao-Yu liu Qinghai Provincial Key Laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining810016China School of Materials Science and Engineering Shenyang University of TechnologyShenyang110870China

In this study,the high-temperature stability and the generation mechanism of the Portevin-Le Chatelier(PLC)effect in solid-solution Mg-1Al-12Y alloy with different heat treatment processes were investigated by adjusting the content of long-period stacking ordered(LPSO)*** was found that the content of LPSO phases in the alloys differed the most after heat treatment at 530℃for 16 h and 24 h,with values of 13.56%and 3.93%***,high-temperature tensile experiments were conducted on these two alloys at temperatures of 150℃,200℃,250℃,and 300℃.The results showed that both alloys exhibited the PLC effect at temperatures ranging from 150 to 250℃.However,at a temperature 300℃,only the alloy with a greater concentration of LPSO phases exhibited the PLC effect,whereas the alloy with a lower proportion of LPSO phases did not exhibit this ***,both alloys exhibited remarkable high-temperature stability,with the alloy containing a greater percentage of LPSO phases also demonstrating superior *** underlying mechanism for this phenomenon lies in the exceptional high-temperature stability exhibited by the second phase within the ***,the LPSO phase effectively obstructs the movement of dislocations,and it also undergoing kinking to facilitate plastic deformation of the *** results indicate that the PLC effect can be suppressed by reducing dislocation pile-up at grain boundaries,which leads to a decrease in alloy plasticity but an increase in *** presence of the PLC effect in the WA121 alloy is attributed to the abundant dispersed second phase within the alloy,which initially hinders the movement of dislocations,leading to an increase in stress,and subsequently releases the dislocations,allowing them to continue their movement and thereby reducing in stress.

关键词： Magnesium alloy long-period stacking ordered(LPSO)phase Portevin-Le Chatelier effect High temperature

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