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基于周期性穿孔悬臂梁的压电俘能器数值仿真研究

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中国海洋大学学报（自然科学版） 2025年第1期55卷 158-165页

作者：崔新风徐思朋黄孝清牟恺宁中国海洋大学工程学院山东青岛266003

针对海洋监测等小型传感器无法长期稳定供电问题,压电俘能器提供了一种新的解决方案。本文提出了一种基于周期性穿孔梁的压电俘能器,它可以有效地将清洁能源(如波浪能)中的振动能转化为电能。本文首先建立了压电能量俘获结构的机电频响... 详细信息

针对海洋监测等小型传感器无法长期稳定供电问题,压电俘能器提供了一种新的解决方案。本文提出了一种基于周期性穿孔梁的压电俘能器,它可以有效地将清洁能源(如波浪能)中的振动能转化为电能。本文首先建立了压电能量俘获结构的机电频响函数模型;然后在理论分析基础上,对与穿孔基底层相关的参数进行了敏感度分析;最后采用有限元方法进行了数值仿真研究。研究结果表明,基底层的厚度和填充率同峰值电压的相关度最为显著,而穿孔数与峰值电压的相关度最不显著。基底层厚度减小、填充率减小和穿孔数增多都有助于降低谐振频率,并提高峰值电压输出。仿真结果表明,与传统无孔结构相比,穿孔结构的谐振频率最大降低了22.63%,而峰值电压最大提高了61.54%。

关键词：海洋传感器自供电压电俘能器周期性穿孔悬臂梁参数敏感度谐振频率峰值电压

环境因子对渤海强壮滨箭虫四季种群结构的影响

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中国海洋大学学报（自然科学版） 2025年第1期55卷 107-117页

作者：孙颖陈学超沈阳孙跃王博渊朱丽岩中国海洋大学海洋生命学院山东青岛266003 深圳市海洋发展研究促进中心广东深圳518034 中国海洋大学水产学院山东青岛266003

为深入探究环境因子与渤海强壮滨箭虫四季种群结构动态的关系,并进一步丰富近年来渤海海域浮游动物的相关研究,本研究于2018年4月—2019年12月在渤海海区开展4个航次的海洋综合调查工作,对渤海强壮滨箭虫的时空分布以及生长繁殖状况进... 详细信息

为深入探究环境因子与渤海强壮滨箭虫四季种群结构动态的关系,并进一步丰富近年来渤海海域浮游动物的相关研究,本研究于2018年4月—2019年12月在渤海海区开展4个航次的海洋综合调查工作,对渤海强壮滨箭虫的时空分布以及生长繁殖状况进行了研究,并讨论了温度、盐度、深度以及饵料等环境因子对其种群结构产生的影响。研究结果显示:盐度与强壮滨箭虫的时空分布具有显著的相关性,在28.5~32.7的范围内,盐度的升高对强壮滨箭虫种群增长有抑制作用;温度通过影响强壮滨箭虫的摄食、代谢来影响其季节上的变化;桡足类作为强壮滨箭虫的主要饵料,也是影响强壮滨箭虫生长繁殖的重要因素。

关键词：环境因子渤海强壮滨箭虫时空分布生长状况

海州湾小眼绿鳍鱼微塑料污染特征及潜在风险评估

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中国海洋大学学报（自然科学版） 2025年第1期55卷 85-94页

作者：王驰薛莹纪毓鹏徐宾铎张崇良吴蒙蒙中国海洋大学水产学院山东青岛266003 海州湾渔业生态系统教育部野外科学观测研究站山东青岛266003 山东省淡水渔业研究院山东济南250013

随着海洋污染的日益加剧,微塑料的危害逐渐被人们关注,其不仅可以随洋流运动,还可以沿着食物链在生态系统中进行传递和累积。为探究海州湾渔业生物的微塑料污染特征,并对聚合物潜在风险进行评估,本研究对海州湾海域小眼绿鳍鱼(Chelidoni... 详细信息

随着海洋污染的日益加剧,微塑料的危害逐渐被人们关注,其不仅可以随洋流运动,还可以沿着食物链在生态系统中进行传递和累积。为探究海州湾渔业生物的微塑料污染特征,并对聚合物潜在风险进行评估,本研究对海州湾海域小眼绿鳍鱼(Chelidonichthys spinosus)体内的微塑料污染特征进行分析,并对其潜在风险进行了评估。研究显示,小眼绿鳍鱼的鳃部和胃肠道普遍存在微塑料,小眼绿鳍鱼体内微塑料平均丰度为(1.98±2.02)个/个体。微塑料尺寸主要集中在500μm以内,颜色以黑色为主,绝大多数为纤维状。在小眼绿鳍鱼鳃部和胃肠道共检测出8种聚合物类型,以聚对苯二甲酸乙二酯(PET)和聚甲基丙烯酸甲酯(PMMA)为主。相关性分析表明,小眼绿鳍鱼胃肠道内的微塑料丰度与全长呈显著负相关关系(P0.05)。利用聚合物危害指数(PHI)进行风险评估表明,海州湾小眼绿鳍鱼聚合物危害总体上处于中低风险水平。

关键词：微塑料小眼绿鳍鱼海州湾海洋污染

葡萄牙栖盐田菌LLJ914的全基因组测序和比较基因组分析

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中国海洋大学学报（自然科学版） 2025年第1期55卷 51-65页

作者：李娟娟刘子涵王雅楠刘莉君张晓华于敏中国海洋大学海洋生命学院山东青岛266003 青岛海洋科技中心海洋生态与环境科学功能实验室山东青岛266237 中国海洋大学进化与海洋生物多样性研究所山东青岛266003

栖盐田菌属细菌因具有较强渗透压耐受能力而备受关注。然而,目前对其适应高盐或其他海洋极端环境的机制尚未探明。为揭示分离自冲绳海槽热液区的葡萄牙栖盐田菌(Salinicola lusitanus)LLJ914与其同属菌株之间的遗传特征及代谢潜力的差异... 详细信息

栖盐田菌属细菌因具有较强渗透压耐受能力而备受关注。然而,目前对其适应高盐或其他海洋极端环境的机制尚未探明。为揭示分离自冲绳海槽热液区的葡萄牙栖盐田菌(Salinicola lusitanus)LLJ914与其同属菌株之间的遗传特征及代谢潜力的差异,探究其在极端海洋生境下的适应机制。通过全基因组测序获得葡萄牙栖盐田菌LLJ914全基因组序列,选取同属其他菌株的基因组进行比较基因组学分析,探究栖盐田菌属各菌株及不同环境来源的葡萄牙栖盐田菌代谢潜力的差异。菌株LLJ914基因组大小为4781556 bp,GC含量为64.0%,共编码4229个蛋白,69个tRNA,12个rRNA。通过构建系统发育树,并进行平均核苷酸和平均氨基酸一致性分析,发现该菌株与马齿苋(Halimione portulacoides)内共生的葡萄牙栖盐田菌CR50^(T)亲缘关系最近。通过功能基因注释分析,发现葡萄牙栖盐田菌具有抵抗各种重金属的相关基因和利用甲基膦酸产生甲烷的phn基因簇;相比于植物内共生菌CR50^(T),菌株LLJ914基因组中包含更多与氨基酸和碳水化合物的运输代谢、能量生产和转换以及转录相关的功能基因。此外,菌株LLJ914基因组中还包含特有的与重金属抵抗、免疫防御及有氧呼吸相关的基因,这可能与其适应复杂极端的深海热液环境有关。本研究揭示了葡萄牙栖盐田菌LLJ914适应深海热液环境的遗传特征及代谢潜力,为更好地认识热液微生物的生态功能提供了参考。

关键词：葡萄牙栖盐田菌极端环境热液区冲绳海槽全基因组测序比较基因组分析

NON-ZONAL BAROCLINIC INSTABILITY IN THE NORTH PACIFIC SUBTROPICAL COUNTERCURRENT

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Journal of Hydrodynamics 2004年第5期16卷 564-570页

作者： LUYan LUODe-hai CollegeofPhysicalandEnvironmentalOceanography OceanUniversityofChinaQingdao266003China CollegeofPhysicalandEnvironmentalOceanography OceanUniversityofChinaQingdao266003China

Observations indicated that in the region of the Subtropical Countercurrent(STCC) over the Pacific (140°E-170°W, 19°N-28°N), the eddy kinetic energy over the western sideis much higher than that over the eastern side. The cause of such a behavior was theoreticallyinvestigated in this paper. The calculation of geostrophic current in this region indicates thatthere are relatively strong meridional geostrophic currents in this region even though the zonalcurrent is dominant in most seasons. Using a 2. 5-layer reduced-gravity model, ba-roclinicinstability of non-zonal current was discussed. It is found that at the western side of STCC thevertical shear of the meridional geostrophic current will be in favor of the ba-roclinicinstability, but at its eastern side it will suppress ba-roclinic instability, thus causing thegrowth of eddies over the western side much faster than that over the eastern side.

关键词： subtropical countercurrent (STCC) meridional geostrophic current baroclinicinstability

THE INTRUSION AND INFLUENCES OF INTRASEASONAL LONG ROSSBY WAVES IN THE EAST CHINA SEA

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Journal of Hydrodynamics 2004年第5期16卷 621-632页

作者： LINXiao-pei WUDe-xing LANJian InstituteofphysicalOceanographyandPhysicalOceanographyLaboratory OceanUniversityofChinaQingdao266003China

The analysis of sea level data from tide stations and ocean generalcirculation model (OGCM) shows that the intraseasonal long Rossby wave results in the intraseasonalvariations of Kuroshio axis and transport in the upper reaches of the Kuroshio in the East China Sea(ECS). Due to the transport modulation induced by Ryukyu Islands, the intraseasonal variation isvery weak in the lower reaches of the Kuroshio in the ECS. A two-layer model reveals the relationamong Kuroshio frontal unstable wave with topography, transport and the axis position of theKuroshio, from which we can infer that the intrusion of intraseasonal long Rossby wave may stimulatethe Kuroshio frontal unstable wave in the upper reaches of the Kuroshio in the ECS. The altimeterdata also shows that the sea level anomaly resulting from intraseasonal long Rossby wave could passthe channel between Taiwan and Ryukyu Islands and propagate northeastward in accord with theKuroshio frontal unstable wave. However, the sea level anomalies passing through the gaps of RyukyuIslands are relative weak and have negligible effects on the Kuroshio variation.

关键词： kuroshio intraseasonal long rossby wave unstable wave

Rescaling Symmetry Flow of the Kadomtsev-Petviashvili Hierarchy

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Chinese Physics Letters 2004年第12期21卷 2327-2329页

作者：王宁 DepartmentofPhysics OceanUniversityofChinaQingdao266003

We present a new symmetry flow of the Kadomtsev--Petviashvili (KP) hierarchy, which origins from the rescaling of whole "multi-time" valuables. This flow describes the deformation of solutions of the KP hierarchy with respect to a noncommutative parameter. It is shown that the introduced rescaling symmetry flow does not commute with the ordinary evolution flows of the KP hierarchy, but commutes with the evolution flows with respect to slow-variables.

关键词： Mathematical physics

A Heavy Sea Fog Event over the Yellow Sea in March 2005: Analysis and Numerical Modeling

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Advances in Atmospheric Sciences 2007年第1期24卷 65-81页

作者：高山红林行沈飙傅刚 Physical Oceanography Laboratory Ocean University of ChinaQingdao 266003 Qingdao Meteorology Observatory Qingdao 266003

In this paper, a heavy sea fog episode that occurred over the Yellow Sea on 9 March 2005 is investigated. The sea fog patch, with a spatial scale of several hundred kilometers at its mature stage, reduced visibility along the Shandong Peninsula coast to 100 m or much less at some sites. Satellite images, surface observations and soundings at islands and coasts, and analyses from the Japan Meteorology Agency （JMA） axe used to describe and analyze this event. The analysis indicates that this sea fog can be categorized as advection cooling fog. The main features of this sea fog including fog area and its movement axe reasonably reproduced by the Fifth-generation Pennsylvania State University/National Center for Atmospheric Research Mesoscale Model （MM5）. Model results suggest that the formation and evolution of this event can be outlined as：（1） southerly warm/moist advection of low-level air resulted in a strong sea-surface-based inversion with a thickness of about 600 m; （2） when the inversion moved from the warmer East Sea to the colder Yellow Sea, a thermal internal boundary layer （TIBL） gradually formed at the base of the inversion while the sea fog grew in response to cooling and moistening by turbulence mixing; （3） the sea fog developed as the TIBL moved northward and （4） strong northerly cold and dry wind destroyed the TIBL and dissipated the sea fog. The principal findings of this study axe that sea fog forms in response to relatively persistent southerly waxm/moist wind and a cold sea surface, and that turbulence mixing by wind shear is the primary mechanism for the cooling and moistening the marine layer. In addition, the study of sensitivity experiments indicates that deterministic numerical modeling offers a promising approach to the prediction of sea fog over the Yellow Sea but it may be more efficient to consider ensemble numerical modeling because of the extreme sensitivity to model input.

关键词： sea fog Yellow Sea numerical modeling MM5 sensitivity experiments

Dynamical Behaviour of H2O in Silica Gel

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Chinese Physics Letters 2002年第5期19卷 711-713页

作者：王燕董顺乐 DepartmentofPhysics OceanUniversityofQingdaoQingdao266003

The vibrational spectra of silica gel with low concentrations of water, 3% and 10%, were studied by inelastic neutron scattering at 5 K. The experimental spectrum for 3% water in silica gel shows dramatic changes compared to the spectra for the other known ice phases in the energy transfer region of 2-140 meV. Its intermolecular librational band is shifted to lower energy by about 20 meV (or by a factor of 1.43) compared to ice Ih, and shows a similar librational band with liquid at 290 K. A significant excess of low-frequency vibration modes (<7 meV) over normal ice Ih and a very wide acoustic peak (4-15 meV) were observed. Experimental data indicate that little H2O (3%) in silica gel exhibits a strong softening of hydrogen bonds compared to bulk normal ice and all the other known ice phases

关键词： Silica gel