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NUMERICAL STUDIES OF INTERNAL SOLITARY WAVE GENERATIONAND EVOLUTION BY GRAVITY COLLAPSE

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Journal of Hydrodynamics 2012年第4期24卷 541-553页

作者： LIN Zhen-hua song jin-bao Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Key Laboratory of Ocean Circulation and Waves Chinese Academy of Sciences Qingdao 266071 China

In this study, an analysis on the internal wave generation via the gravity collapse mechanism is carried out based on the theoretical formulation and the numerical simulation. With the linear theoretical model, a rectangle shape wave is generated and propagates back and forth in the domain, while a two-dimensional non-hydrostatic numerical model could reproduce all the observed phenomena in the laboratory experiments conducted by Chen et al. （2007）, and the related process realistically. The model results further provide more quantitative information in the whole domain, thus allowing an in depth understanding of the corresponding internal solitary wave generation and propagation. It is shown that the initial type of the internal wave is determined by the relative height between the perturbation and the environmental density interface, while the final wave type is related to the relative height of the upper and lower layers of the environmental fluid. The shape of the internal wave generated is consistent with that predicted by the KdV and EKdV theories if its amplitude is small, as the amplitude becomes larger, the performance of the EKdV becomes better after the wave adjusts itself to the ambient stratification and reaches an equilibrium state between the nonlinear and dispersion effects. The evolution of the mechanical energy is also analyzed.

关键词： gravity collapse intemal wave energy analysis

海洋背景涡度对台风康森引起的近惯性波的影响研究

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海洋与湖沼 2024年第3期55卷 589-598页

作者：郑晓婷曹安州吕咸青宋金宝浙江大学海洋学院浙江舟山316021 中国海洋大学海洋与大气学院山东青岛266100

近惯性波是海洋中普遍存在的一种内波,它在海洋中的传播和耗散受到背景涡度的影响。基于混合坐标海洋模型(hybrid coordinate ocean model,HYCOM)再分析数据,研究了海洋背景正、负涡度对台风康森在南海引起的近惯性波的不同影响。结果表... 详细信息

近惯性波是海洋中普遍存在的一种内波,它在海洋中的传播和耗散受到背景涡度的影响。基于混合坐标海洋模型(hybrid coordinate ocean model,HYCOM)再分析数据,研究了海洋背景正、负涡度对台风康森在南海引起的近惯性波的不同影响。结果表明:负涡度能捕捉并促进近惯性能量向海洋深层的传播,可传播到1200 m以深;而正涡度则阻碍近惯性能量的下传,使其主要集中在海洋上层500 m以内。负涡度区域能维持较强的近惯性能量10 d以上,而正涡度区域内的近惯性能量维持时间在1周左右。负涡度区域内的近惯性波由第二和第三模态主导,而正涡度区域内的近惯性波由第一和第二模态主导,导致海洋内部(500~1000 m)负涡度区域内的近惯性波剪切比正涡度区域内的近惯性波剪切强1~2个量级。波射线模型模拟结果显示,近惯性波在负涡度区域边缘发生反射,进而被负涡度区域捕获;而正涡度区域内的近惯性波有加速远离源地的趋势。上述结果进一步说明,海洋背景负涡度能增强近惯性能量的垂向传播,而正涡度则促进了近惯性能量的水平传播。

关键词：海洋背景涡度近惯性波混合坐标海洋模型再分析数据波射线模型

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磷、氟杂质对建筑石膏性能的影响研究

现代化工 2024年第10期44卷 137-143页

作者：宋金宝梅毅夏举佩周琼波何宾宾聂云祥昆明理工大学化学工程学院云南昆明650500 云南省磷化工节能与新材料重点实验室云南昆明650500 云南磷化集团有限公司云南昆明650500

以磷石膏应用为研究目标,通过向天然石膏中添加磷酸、氟硅酸、氢氟酸、磷酸氢钙,研究水溶磷、水溶氟、共晶磷对石膏砌块物理力学性能的影响。结果表明,水溶磷、共晶磷对石膏砌块凝结时间均有缓凝作用,力学性能随添加量增加而降低;共晶... 详细信息

以磷石膏应用为研究目标,通过向天然石膏中添加磷酸、氟硅酸、氢氟酸、磷酸氢钙,研究水溶磷、水溶氟、共晶磷对石膏砌块物理力学性能的影响。结果表明,水溶磷、共晶磷对石膏砌块凝结时间均有缓凝作用,力学性能随添加量增加而降低;共晶磷的影响小于水溶磷;水溶氟缩短了砌块凝结时间,降低了力学性能;水溶磷、水溶氟的共同作用对砌块具有促凝功能,在水溶磷、水溶氟总质量分数为0.15%时,石膏砌块力学性能出现最大值;随着水溶磷、水溶氟质量分数的增加,抗折抗压呈现断崖式下降。在含有0.2%共晶磷的石膏中加入水溶磷、水溶氟时,由于水化过程中共晶磷部分转化为水溶磷,导致凝结时间延长,力学性能下降。

关键词：水溶磷水溶氟共晶磷石膏力学性能

Reverse Furthest Neighbors Query in Road Networks

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Journal of Computer Science & Technology 2017年第1期32卷 155-167页

作者： Xiao-Jun Xu jin-song bao Bin Yao jing-Yu Zhou Fei-Long Tang Min-Yi Guo Jian-Qiu Xu School of Software Beijing Institute of Technology Beijing 100081 China First Research Institute of Ministry of Public Security Beijing 100048 China College of Mechanical Engineering Donghua University Shanghai 200051 China Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiao Tong University Shanghai 200240 China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

Given a road network G = （V, E）, where V（E） denotes the set of vertices（edges） in G, a set of points of interest P and a query point q residing in G, the reverse furthest neighbors （RFNR） query in road networks fetches a set of points p ∈ P that take q as their furthest neighbor compared with all points in P ∪ {q}. This is the monochromatic RFNR （MRFNR） query. Another interesting version of RFNR query is the bichromatic reverse furthest neighbor （BRFNR） query. Given two sets of points P and Q, and a query point q ∈ Q, a BRFNR query fetches a set of points p ∈ P that take q as their furthest neighbor compared with all points in Q. This paper presents efficient algorithms for both MRFNR and BRFNR queries, which utilize landmarks and partitioning-based techniques. Experiments on real datasets confirm the efficiency and scalability of proposed algorithms.

关键词： reverse furthest neighbor road network landmark hierarchical partition

Determining the Onset and Strength of Unforced Wave Breaking in A Numerical Wave Tank

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China Ocean Engineering 2014年第4期28卷 501-509页

作者：何海伦宋金宝 State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administration Key Laboratory of Ocean Circulation and Waves Chinese Academy of Sciences

A numerical wave tank is used to investigate the onset and strength of unforced wave breaking, and the waves have three types of initial spectra： constant amplitude spectrum, constant steepness spectrum and Pierson-Moscowitz spectrum. Numerical tests are performed to validate the model results. Then, the onset of wave breaking is discussed with geometric, kinematic, and dynamic breaking criteria. The strength of wave breaking, which is always characterized by the fractional energy loss and breaking strength coefficient, is studied for different spectra. The results show how the energy growth rate is better than the initial wave steepness on estimating the fractional energy losses as well as breaking strength coefficient.

关键词： wave breaking numerical wave tank fractional energy loss breaking strength coefficient

Effective AC Response of Nonlinear Spherical Coated Composites

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Communications in Theoretical Physics 2004年第5期41卷 771-774页

作者： CHEN Xiao-Gang WEI En-Bo song jin-bao Institute of Oceanology,the Chinese Academy of Sciences,Qingdao 266071,China Institute of Oceanology the Chinese Academy of Sciences Qingdao 266071 China

Under alternating current electric field,effective response of granular nonlinear composites with sphericalcoated inclusions is investigated in the dilute limit by using the perturbation *** an external sinusoidalapplied field with finite frequency ω,the local fields and potentials of composites in general consist of components at allharmonics for cubic nonlinear constitutive *** derive the local potentials of spherical coated composites ***,we give the formulae of the nonlinear effective AC susceptibility at the third harmonic frequency.

关键词： nonlinear composite coated composite effective nonlinear response

Mapping of quantitative trait loci for fiber and lignin contents from an interspecific cross Oryza sativa×Oryza rufipogon

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第7期12卷 518-526页

作者： Jian-kun XIE Xiang-li KONG Jie CHEN Biao-lin HU Piao WEN Jie-yun ZHUANG jin-song bao Institute of Nuclear Agricultural Sciences College of Agriculture and Biotechnology Zhejiang University Hangzhou 310029 China College of Life Sciences Jiangxi Normal University Nanchang 330022 China China National Rice Research Institute Hangzhou 310006 China

Rice straw is always regarded as a by-product of rice production,but it could be a significant energy source for ruminant *** of the genetic variation and genetic architecture of cell wall traits will facilitate rice breeders by improving relevant traits through selective breeding and genetic *** common wild rice,Oryza rufipogon Griff.,which is considered to be the progenitor of Oryza sativa,has been widely utilized for the identification of genes of agronomic importance for rice genetic *** the present study,the mapping of quantitative trait loci (QTLs) for acid detergent fiber (ADF),neutral detergent fiber (NDF),acid detergent lignin (ADL),and ADL/NDF ratio was carried out in two environments using a backcrossed inbred line (BIL) population derived from a cross between the recurrent parent Xieqingzao B (XB) and an accession of Dongxiang wild rice (DWR).The results indicated that all four traits tested were continuously distributed among the BILs,but many BILs showed transgressive segregation.A total of 16 QTLs were identified for the four traits,but no QTLs were in common in two environments,suggesting that environment has dramatic effects on fiber and lignin *** to the QTL positions for grain yield-related traits,there were no unfavorable correlations between grain yield components and cell wall traits in this *** QTLs identified in this study are useful for the development of dual-purpose rice varieties that are high in grain yield and are also high in straw quality.

关键词： Rice straw Acid detergent fiber Lignin Quantitative trait loci

Assessment of surface drag coefficient parametrizations based on observations and simulations using the Weather Research and Forecasting model

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Atmospheric and Oceanic Science Letters 2016年第4期9卷 327-336页

作者： LI Fu-Ning song jin-bao HE Hai-Lun LI Shuang Li Xia GUAN Shou-De Institute of Oceanology Chinese Academy of Sciences College of Earth Science University of Chinese Academy of Sciences Ocean College Zhejiang University State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography Institute of Atmospheric Physics Chinese Academy of Sciences

The drag coefficient is important in meteorological studies of the boundary layer because it describes the air-sea momentum flux. Eight drag coefficient schemes were assessed. These parametrizations were compared taking into account data from in situ and laboratory *** drag coefficients determined using three schemes were consistent with the level-off phenomenon, supported by the results of laboratory studies. The drag coefficient determined using one scheme decreased at wind speeds higher than approximately 30 m s-1, in agreement with indirect measurements under typhoon conditions. In contrast, the drag coefficients determined using the other four schemes increased with wind speed, even under high wind regimes. Sensitivity tests were performed using simulations of two super typhoons in the Weather Research and Forecasting model. While the typhoon tracks were negligibly sensitive to the parametrization used, the typhoon intensities （the maximum lO-m wind speed and the minimum sea level pressure）, sizes, and structure, were very sensitive to it.

关键词： Air-sea momentum flux drag coefficient typhoon WRF model

Poly(heptazine imide)nanocrystal for hydrogen peroxide evolution in the dark by accumulating photo-generated electrons

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Nano Research 2024年第9期17卷 8036-8044页

作者： song Kou Shu Lian Xiaodong Xie Wei Ren Yu jin Jiahui bao Honghui Ou Guidong Yang XJTU-Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China Fujian-Taiwan-Hongkong-Macao Science and Technology Cooperation Base of Intelligent Pharmaceutics Institute of OceanographyCollege of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China School of Food and Bioengineering Fujian Polytechnic Normal UniversityFuqing 350300China

Organic conjugated polymers have received extensive attention due to their unique electronic ***,there have been relatively few reports on the dark photocatalytic reactions utilizing organic conjugated ***,we report the successful synthesis of an organic conjugated polymer based on poly(heptazine imide)nanocrystals(CNNCs)for H_(2)O_(2)evolution and biomedical applications using a simple salt molten method and sonication-centrifugation *** results show that these colloid CNNCs have the characteristics of photogenerated electrons accumulation and realize dark photocatalysis with high reducibility under visible light ***,these accumulating photogenerated electrons can reduce O_(2)in darkness to produce H_(2)O_(2).In addition,cytotoxicity tests were conducted and it was found that H_(2)O_(2)produced under dark conditions could oxidize L-arginine(L-Arg)to NO,which effectively killed tumors in the *** work provides an important strategy to construct organic conjugated semiconductor nanocrystals and applying them to future energy and biomedical fields.

关键词： poly(heptazine imide) photocatalysis photogenerated electrons hydrogen peroxide evolution cancer treatment