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Dissipation source function and an improvement to LAGFD-WAM model

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Acta Oceanologica Sinica 1992年第4期11卷 471-481页

作者： yuan {1., {2. feng, Pan Zengdi and Sun Letao 1. First institute of Oceanography, State Oceanic Administration, qingdao 2.6003, china First institute of Oceanography State Oceanic Administration Qingdao 266003 China China

In this paper, a new theoretical expression of dissipation term is presented on the basis of statistical model of breaking wave, which is an improvement to LAGFD-WAM wave model. The computational results in three typical wind fields show a good improvement to LAGFD-WAM model and a better accuracy in comparison with the observed data in the South china Sea.

关键词： WAM mode Dissipation source function and an improvement to LAGFD-WAM model

LAGFD-WAM numerical wave model-Ⅰ. Basic physical model

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Acta Oceanologica Sinica 1991年第4期10卷 483-488页

作者： yuan {1., {2. feng, Pan Zengdi Sun Letao First institute of Oceanography, State Oceanic Administration, qingdao 2.6003, china

The LAGFD-WAM wave model is a third generation wave model. In the present paper the physical aspect of the model was shown in great detail including energy spectrum balance equation, complicated characteristics equati... 详细信息

关键词： wave LAGFD-WAM numerical wave model Basic physical model WAM

LAGFD-WAM numerical wave model- Ⅱ. Characteristics inlaid scheme and its application

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Acta Oceanologica Sinica 1992年第1期11卷 13-23页

作者： yuan {1., {2. feng, Pan Zengdi Sun Letao First institute of Oceanography, State Oceanic Administration, qingdao 2.6003, china

In this paper the parameterizational approach of nonlinear source function and the implicit scheme of the model are discussed in detail. The matching problem is solved between time and space steps using the characteristics inlaid scheme with very strong physical meaning. The computational comparison in typical winds shows some improvements to the WAM model. That the hindcast results of the model for typhoon cases are in good agreement with real data illustrates its applicability to wave forecast and engineering study.

关键词： wave mode LAGFD-WAM numerical wave model WAM

Multi-core structure of the main part of the Kuroshio at G-PN section in the East china Sea

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chinese Science Bulletin 2006年第6期51卷 738-746页

作者： CHEN Hongxia yuan {1. {2. feng institute of {1. Chinese Academy of Sciences Qingdao266071 China First institute of Oceanography State Oceanic Administration Qingdao 266061 China Graduate School of chinese {1. of Sciences Beijing 100039China

Sectional velocity distribution of the East china Sea Kuroshio is one of the basic points in the study of the Kuroshio. Hydrographic temperature and salinity data at G-PN section in the East china Sea from June {2.55 to November 2.0{2.are collected and properly processed to calculate the geostrophic cur-rent using dynamic height method at the transect of the Kuroshio. After analysis of calculation results, the basic current structure of the Kuroshio in its main part is examined together with scalar estimate and char-acters of multi- core structure, and spacial-temporal variations of current cores’ position. Main result shows that ({2. single-core structure, double-core structure and multi-core structure are basic forms in axial part of the Kuroshio; (2. abvious temporal varia-tions exist in current structure of the Kuroshio; (3) the current of structure of the Kuroshio has distinctly seasonal association. The number of current cores is on the high side of core numbers in average and multi-core stucture appears in fall mostly.

关键词：黑潮中国东海日本洋流多中心结构速度分布

Statistical model on the surface elevation of waves with breaking

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Science china Earth Sciences 2008年第5期51卷 759-768页

作者： yuan {1. {2. feng ZHANG ShuWen HAN Lei Marine Science and Numerical Modeling Laboratory SOAQingdao 266061China First institute of Oceanography SOAQingdao 266061China South china Sea Environmental {1. Guangdong Ocean UniversityZhanjiang 524088China

In the surface wind drift layer with constant momentum flux, two sets of the consistent surface eleva- tion expressions with breaking and occurrence conditions for breaking are deduced from the first in- tegrals of the energy and vortex variations and the kinetic and mathematic breaking criterions, then the expression of the surface elevation with wave breaking is established by using the Heaviside function. On the basis of the form of the sea surface elevation with wave breaking and the understanding of small slope sea waves, a triple composite function of real sea waves is presented including the func- tions for the breaking, weak-nonlinear and basic waves. The expression of the triple composite func- tion and the normal distribution of basic waves are the expected theoretical model for surface elevation statistics.

关键词： first integrals for energy and vortex variations in wind drift layer kinetic and mathematic wave breaking criterions triple composite function of the real sea waves normal distribution of the basic waves

胶州湾大气降水水溶性离子组成特征及来源解析

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中国环境科学 2024年第3期44卷 1225-1233页

作者：冯辰龙邢建伟袁华茂宋金明中国科学院海洋研究所中国科学院海洋生态与环境科学重点实验室山东青岛266071 中国科学院大学北京100049 中国科学院海洋大科学研究中心山东青岛266071 青岛科技大学化学与分子工程学院山东青岛266042

基于2.1.年6月至2.2.年8月胶州湾沿岸的大气降水样品,分析降水主要水溶性离子(Na^(+)、K^(+)、Ca^(2.)、Mg^(2.)、NH^(4+)、F-、Cl^(-)、SO_(4)^(2.)、NO_(3)^(-)、MAS-(甲基磺酸根))的组成特征和湿沉降通量,评估其对近海营养成分输入... 详细信息

基于2.1.年6月至2.2.年8月胶州湾沿岸的大气降水样品,分析降水主要水溶性离子(Na^(+)、K^(+)、Ca^(2.)、Mg^(2.)、NH^(4+)、F-、Cl^(-)、SO_(4)^(2.)、NO_(3)^(-)、MAS-(甲基磺酸根))的组成特征和湿沉降通量,评估其对近海营养成分输入的贡献和潜在生态效应,并利用气团后向轨迹和正定矩阵因子分解法(PMF)解析其主要来源.结果表明,观测期间,胶州湾大气降水雨量加权平均(Volume-weighted Mean,VWM)pH为6.41.电导率的VWM值为1..3μS/cm,降水中水溶性离子以Na^(+)、NH^(4+)、NO_(3)^(-)、Cl^(-)和SO_(4)^(2.)为主,在季节上呈现出冬春季浓度明显高于夏秋季的特征,而湿沉降通量则因受降水量的控制而主要集中在夏季(约占55%).胶州湾区域大气降水共清除72.4.6t水溶性离子,营养盐(主要为NH^(4+)和NO_(3)^(-),以氮计)沉降入海量达951.9t/a,表明降水在清洁大气的同时也加剧了海洋环境的污染和海洋生态系统的失衡.气团后向轨迹分析得到了观测期间控制胶州湾降水的4类主要气团,在不同季节,降水过程受到不同气团的影响,其中以来自华东地区和东北方向的气团的影响较大.基于PMF的源解析结果显示,胶州湾大气降水水溶性离子受到农业源、海洋源、扬尘源、生物质和垃圾燃烧源、工业和交通源5种来源的共同控制,其中以农业源排放的贡献最为突出(2..7%),而其他4种源的贡献大致相当.研究证实胶州湾大气环境受到复杂人为源排放、矿物沙尘以及海洋源排放的综合制约,而人为排放的贡献占主导地位.

关键词：水溶性离子湿沉降通量大气降水气团后向轨迹正定矩阵因子模型胶州湾

山东烤烟水溶性糖和Amadori化合物组成特征及其对感官质量的影响

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南方农业学报 2024年第4期55卷 1139-1148页

作者：任明波李静马志远戴华伟高峰邱军庞雪莉山东淄博烟草有限公司山东淄博255035 中国农业科学院烟草研究所山东青岛266101

【目的】明晰山东烤烟上、中2.部位B2.、C3F烟叶中水溶性糖和Amadori化合物组分构成及含量分布特征,分析化合物对烤烟感官质量的影响,为改进和精准调控山东烤烟感官品质提供数据支持。【方法】选取山东主产区生产的烤烟B2.和C3F叶片为... 详细信息

【目的】明晰山东烤烟上、中2.部位B2.、C3F烟叶中水溶性糖和Amadori化合物组分构成及含量分布特征,分析化合物对烤烟感官质量的影响,为改进和精准调控山东烤烟感官品质提供数据支持。【方法】选取山东主产区生产的烤烟B2.和C3F叶片为试验材料,利用气相色谱—质谱联用技术(GC-MS)和高效液相色谱—三重四极杆串联质谱技术(HPLC-MS/MS)对烤烟中水溶性糖和Amadori化合物进行分析,通过正交偏最小二乘判别分析(OPLS-DA)方法对B2.和C3F烟叶样品进行判别分析,并对卷烟样品进行评吸,通过相关分析揭示与山东烤烟各感官质量指标呈正/负相关的关键化学成分。【结果】定性定量分析山东烤烟中1.种水溶性糖和8种Amadori化合物,其中葡萄糖和果糖含量较高,蔗糖次之,其余水溶性糖含量较低;B2.和C3F烟叶间阿拉伯糖醇、阿洛酮糖和甘露醇含量差异显著(P2.烟叶的1.50倍,B2.烟叶的阿洛酮糖和甘露醇含量分别是C3F烟叶的1.2.和48.85倍;B2.和C3F烟叶中主要Amadori化合物均为1.脱氧-1.L-脯氨酸-D-果糖(Fru-Pro)(1.~45 mg/g),其次为1.脱氧-1.L-丙氨酸-D-果糖(Fru-Ala)、1.脱氧-1.L-谷氨酸-D-果糖(Fru-Glu)、1.脱氧-1.L-苯丙氨酸-D-果糖(Fru-Phe)、葡糖胺(GLU)和1.脱氧-1.L-色氨酸-D-果糖(Fru-Trp)(1.2. mg/g)。挖掘出对B2.和C3F烟叶区分贡献较大的化合物,按贡献大小排序为甘露醇>阿洛酮糖>核糖醇>来苏糖>核糖>1.脱氧-1.L-缬氨酸-D-果糖(Fru-Val)>GLU>果糖>Fru-Ala。C3F烟叶各感官质量指标得分均明显高于B2.烟叶。在B2.烟叶中,阿拉伯糖醇、Fru-Pro、阿拉伯糖、木糖醇、阿洛酮糖和Fru-Ala与部分感官评吸指标呈显著或极显著(P1.下同)正相关,Fru-Glu和GLU与部分感官评吸指标呈显著或极显著负相关。在C3F烟叶中,核糖、阿洛酮糖、果糖、葡萄糖和麦芽糖与部分感官评吸指标呈显著或极显著正相关,来苏糖、核糖醇、Fru-Glu和Fru-Phe与部分感官评吸指标呈显著或极显著负相关。【结论】山东烤烟水溶性糖和Amadori化合物的含量在部位间差异明显,进而对烟叶感官质量产生不同的影响。

关键词：山东烤烟水溶性糖 Amadori化合物感官质量

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Hydrodynamical Basis for Interpreting the Features of a Kind of Ocean Objects on Synthetic Aperture Radar Images

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chinese Physics Letters 1998年第12期15卷 931-933页

作者： YU Wei-dong hua {1. JIN Mei-bing PAN Zeng-di {2. Ye-li First institute of Oceanography State Oceanic AdministrationQingdao 266003

A new hydrodynamical model interpreting the synthetic aperture radar(SAR)imaging of a kind of ocean objects is *** is based on the perturbation analysis of the wave height spectrum balance *** appropriate form of equilibrium wave height spectrum is deduced and then used to obtain the relative variation rate of the spectrum perturbation to its equilibrium *** variation rate reflects directly the features of a kind of ocean objects on the SAR images.

关键词： spectrum Synthetic equilibrium

Stabilization technology and corrosion mechanism of rust layer on Q370 weathering steel surface

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Journal of Iron and Steel Research International 2022年第10期29卷 1694-1709页

作者： Shao-zheng Ma Li-juan Sun Hu-yuan Sun Hong-bin Sun Jin-{1. Jiang Yi-xin Yin Shu-{1. Qu Zhen-hua Liu Shao-xia Xu Key Laboratory of Marine Environmental Corrosion and Bio-Fouling Institute of OceanologyChinese Academy of SciencesQingdao266071ShandongChina University of chinese {1. of Sciences Beijing100049China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237ShandongChina Shandong Weilai High Speed Railway Co. Ltd.Jinan250102ShandongChina School of Civil Engineering Shandong UniversityJinan250061ShandongChina china Railway No.1. Engineering Group Co. Ltd.Qingdao266034ShandongChina

A newly developed rust layer on Q370qENH weathering steel(sample C)was studied under dry–wet cycle test of 3.5 wt.%NaCl solution and salt spray test,compared with the bare weathering steel(sample A)and the weathering steel with additive contents(CuSO_(4)0.2.FeSO_(4)0.1.NaHSO_(3)0.02.NaCl 0.02.Na_(2.HPO_(4)0.01.and water balance,in mass%,termed as sample B).Corrosion mechanism of Q370qENH weathering steel after different surface treatments was investigated by means of surface potential scanning,mass change,polarization curve,and X-ray *** results of X-ray diffraction indicate that rust of bare weathering steel has rare Fe_(3)O_(4),and a dense oxide layer mainly composed of Fe_(3)O_(4) is formed on rust of both sample B and sample *** surface potential of sample A gradually increases to−0.2.V in the dry–wet cycle test,while the surface potential of sample A maintains at about−0.6 V in the salt spray *** surface potential of sample B and sample C is higher than that of sample A in the early stage and remains stable during the short-term accelerated corrosion ***,the mass change of sample C gradually stabilizes with time in the dry–wet cycle and salt spray *** corrosion current of the sample A is lower than that of sample C in the initial stage of short-term accelerated corrosion ***,the corrosion current of sample C is smaller than that of the sample A in the *** main components of the deep rust of sample A areγ-FeOOH andα-FeOOH,while those of the deep rust of sample B and sample C are Fe_(3)O_(4).

关键词： Weathering steel Rust layer stabilization Surface treatment Corrosion Surface potential scanning Rust layer analysis