唐山市海岸带用地结构及其生态系统服务价值的时空变化研究   总被引：2，自引：0，他引：2       下载免费PDF全文

刘亮  徐伟  岳奇  胡恒  张盼盼 《海洋开发与管理》2017,34(12):51-55

文章对唐山市沿海地区1991—2015年土地利用和结构变化及其生态系统服务价值进行核算分析和量化评估。结果表明:1991—2015年唐山市海岸带主要地物类型涉及耕地、公路用地、河流水面、建设用地、坑塘水面、盐田、填海用地和裸地,其中坑塘水面占地最多,海岸带开发利用总面积不断增大,用地类型有所转化且向海域扩张,新增用地主要来自围填海且以填海造地为主;海岸带生态系统服务价值呈逐年下降的趋势,以2006—2010年变化最为明显,主要原因为海水面积减少。在充分认识填海造地活动双面性的基础上,建议慎重开展填海造地,集约节约利用海洋空间资源,合理科学规划填海区域,提高海洋资源利用效率。  相似文献   

Ice-Induced Fatigue Analysis by Spectral Approach for Offshore Jacket Platforms with Ice-Breaking Cones     

岳前进刘圆  张日向屈衍 王瑞学 《中国海洋工程》2007,21(1):1-10

The spectral methods and ice-induced fatigue analysis are discussed based on Miner's linear cumulative fatigue hypothesis and S-N curve data.According to the long-term data of full-scale tests on the platforms in the Bohai Sea,the ice force spectrum of conical structures and the fatigue environmental model are established.Moreover,the finite element model of JZ20-2MSW platform,an example of ice-induced fatigue analysis,is built with ANSYS software.The mode analysis and dynamic analysis in frequency domain under all kinds of ice fatigue work conditions are carried on,and the fatigue life of the structure is estimated in detail.The methods in this paper can be helpful in ice-induced fatigue analysis of ice-resistant platforms.  相似文献   

利用扩增vvhA基因的环介导等温扩增技术快速，特异而敏感地检测创伤弧菌     

张丽娜  王明义  丛殿霞  丁淑研  丛日楠  岳进勇  耿建利  胡成进 《海洋学报(英文版)》2018,37(4):83-88

创伤弧菌是一种可感染人类的河口病原菌。建立快速,特异而敏感的检测方法,有助于创伤弧菌感染的早期疾病诊断和及时治疗。本研究设计了针对vvhA基因的一系列引物（包括两对外部引物和两对内部引物）,采用环介导等温扩增技术（LAMP）来检测创伤弧菌。结果显示,本方法的最适扩增温度是63℃,反应仅需35分钟。扩增产物不仅可以用含有DNA ladder的琼脂糖凝胶电泳检出,也可借助钙黄绿素直接肉眼观察。采用45株菌株检测该方法的特异性,其中所有创伤弧菌均被检出而其他菌株检测结果皆为阴性。本方法的敏感性是普通PCR扩增的100倍,同时利用该方法可以准确检测出所有的模拟样品、临床标本及环境样品。与其他已知方法比较,针对vvhA基因的介导等温扩增技术可以快速、简单、敏感及特异地鉴定创伤弧菌。  相似文献   

Rapid,specific and sensitive detection of Vibrio vulnificus by loop-mediated isothermal amplification targeted to vvhA gene     

ZHANG Lina  WANG Mingyi  CONG Dianxia  DING Shuyan  CONG Rinan  YUE Jinyong  GENG Jianli  HU Chengjin 《海洋学报(英文版)》2018,(4)

Vibrio vulnificus is an estuarine bacterial pathogen for human.The rapid,specific and sensitive detection of V.vulnificus is urgently needed for early disease diagnosis and timely treatment of V.vulnificus infection.In the study,a loop-mediated isothermal amplification(LAMP) technique was developed for V.vulnificus detection with a set of primers,composed of two out primers and two inner primers targeted to vvh A gene.The optimal amplification temperature was 63°C and the reaction only took 35 min.The amplification products could not only be detected by agarose gel electrophoresis with ladder-like pattern bands,but also could be visualized using calcein with naked eye directly.Forty-five strains were tested for the specificity of LAMP assay,and all the V.vulnificus strains were identified correctly while other strains were negative results.The sensitive of the new LAMP assay was 100-fold more sensitive than the conventional PCR.Meanwhile,all the V.vulnificus strains were detected correctly in spiked,clinical and environmental samples by the new LAMP assay.Compared with other well-known techniques,the new LAMP assay targeted to vvh A gene was extremely rapid,simple,sensitive and specific for V.vulnificus identification.  相似文献   

Newly discovered hydrothermal fields along the ultraslow-spreading Southwest Indian Ridge around 63°E     

陈杰  陶春辉  梁锦  廖时理  董传万  李怀明  李伟  王媛  岳羲和  何拥华 《海洋学报(英文版)》2018,37(11):61-67

The ultraslow-spreading Southwest Indian Ridge(SWIR) to the east of the Melville fracture zone is characterized by very low melt supply and intensive tectonic activity. Due to its weak thermal budget and extremely slow spreading rate, the easternmost SWIR was considered to be devoid of hydrothermal activity until the discovery of the inactive Mt. Jourdanne hydrothermal field(27°51′S, 63°56′E) in 1998. During the COMRA DY115-20 cruise in2009, two additional hydrothermal fields(i.e., the Tiancheng(27°51′S, 63°55′E) and Tianzuo(27°57′S, 63°32′E)fields) were discovered. Further detailed investigations of these two hydrothermal sites were conducted by Chinese manned submersible Jiaolong in 2014–2015. The Tiancheng filed can be characterized as a lowtemperature(up to 13.2°C) diffuse flow hydrothermal field, and is hosted by fractured basalts with hydrothermal fauna widespread on the seafloor. The Tianzuo hydrothermal field is an inactive sulfide field, which is hosted by ultramafic rocks and controlled by detachment fault. The discovery of the three hydrothermal fields around Segment #11 which receives more melt than the regional average, provided evidence for local enhanced magmatism providing heat source to drive hydrothermal circulation. We further imply that hydrothermal activity and sulfide deposits may be rather promising along the easternmost SWIR.  相似文献   

球石藻及其生态功能     

张健  李佳芮  杨璐  岳娜娜 《海洋科学》2018,42(2):150-158

球石藻(Coccolithophore)是一类在全球海洋中广泛分布的海洋微型浮游植物,它们在海洋浮游植物功能群落中是一类极其重要的钙化生物类群,也是海洋中生源无机碳的重要来源,并且在海洋的碳循环过程中起到重要的作用。球石藻由于快速增殖而发生水华的过程中能够释放大量的具有挥发性的二甲基硫(DMS)和丙烯酸(acrylic acid),它们是影响气候变化,特别是引起区域性环境效应(温室效应)的关键性物质。本文针对球石藻的生物学特征及其生态重要性作了简要阐述。  相似文献   

OMS平台模型的服务化封装方法研究     

闾国年  温永宁  乐松山  张丰源  陈旻  王明 《地理信息世界》2018,(3):11-16

以OMS平台模型为研究对象,提出了一种地理分析模型服务化封装策略,以减少在模型提供者和模型使用者之间共享模型时遇到的障碍。通过设计模型描述接口、模型执行接口和模型部署接口,实现OMS平台模型的封装策略,形成标准化部署包。相关部署包可以部署到模型服务容器上,并发布为网络空间可重用共享的服务,以支撑分布式模型集成与模拟。本文以OMS平台下的AgES-W模型为案例,验证了模型封装策略的可行性和实用性,为网络环境下模型共享与集成奠定了基础。  相似文献   

不同排列方式和间隙比下双圆柱流致振动特性研究   总被引：1，自引：0，他引：1  

刘巨保  杨明  岳欠杯  丁宇奇  姚利明 《海洋工程》2018,36(4):105-113

采用基于ALE的流固耦合分析方法,将圆柱体振动模型简化为平面双自由度质量-弹簧-阻尼系统,进行了计算参数无关性分析。对不同θ角和间隙比T下的双圆柱流致振动进行数值模拟,并与单圆柱振动计算结果进行比较,得到了不同θ角和间隙比T下中心圆柱的升阻力系数、流场分布和运动轨迹变化情况。通过分析发现小间隙比下由于两圆柱间的相互干扰,改变了中心圆柱的尾涡结构,导致了升力和阻力系数随不同θ角而发生变化;小间隙比下由于两圆柱间的相互干扰影响,均使中心圆柱的轨迹在不同θ角下发生了较大的变化,顺流向的振动频率与单圆柱振动时相比出现了多倍频,导致其运动轨迹发生了变化。  相似文献   

青岛海洋趋磁球菌QH-3 的鞭毛特征     

周克  潘红苗  岳海东  肖天  吴龙飞 《海洋科学》2010,34(12):88-92

趋磁细菌(magnetotactic bacteria,MTB)是一类能够沿着磁力线运动的特殊细菌。MTB在胞内磁小体的导向下借助自身鞭毛进行趋磁趋氧运动,以到达适宜的生境。本研究在青岛潮间带沉积物中发现大量的趋磁球菌,通过光镜与透射电镜对其运动方式与显微结构进行观察。结果显示优势趋磁细菌为卵球形,大小为2.5μm×2.1μm,宽长比为0.85,将其命名为QH-3。QH-3为趋北型(North-seeking)MTB,运动速度88μm/s,细胞内两侧各有一条由棱柱形颗粒组成的磁小体链。QH-3在菌体同一侧有两个由直径62 nm±9 nm的鞘包裹7根鞭毛组成的鞭毛束。这种特殊的鞭毛结构与已报道的致病菌的不同,而与法国地中海趋磁球菌MO-1的相似。  相似文献   

抗冰导管架平台动力特性分析     

张大勇  岳前进  车啸飞  刘圆  李辉辉 《海洋工程》2010,28(1)

目前的抗冰导管架平台结构设计主要是考虑极限冰力引起的破坏,尚未形成基于动冰力响应分析的结构设计。为了更好研究冰荷载、冰激振动机理以及提出合理的概念设计,冰荷载下抗冰导管架结构的动力特性分析是十分必要的。基于现场冰与导管架结构相互作用的多年观测以及数值模拟研究,分析渤海辽东湾典型导管架结构在交变冰力作用下的动力特性,提出了适于冰荷载研究与抗冰导管架结构概念设计、分析的简化力学模型,解释柔性抗冰导管架结构动力效应显著的原因。  相似文献