高质量增长背景下海洋经济发展的时空协调模式研究——基于环渤海地区地级市的实证   总被引：1，自引：1，他引：0  

狄乾斌  於哲  徐礼祥 《地理科学》2019,39(10):1621-1630

海洋经济协调发展是科学评价区域海洋经济发展质量的重要依据。遵循城市与海洋经济协同的发展理念,构建环渤海城市海洋经济发展时空协调度评价体系,运用复杂系统时空协调度评价模型,计算并分析2008~2016年环渤海城市海洋经济发展时空协调度,通过SaTScan软件分析其时空聚类区。研究结果显示：①海洋经济各系统发展水平中,社会系统呈大幅度分散上升趋势,经济系统、生态系统与综合系统呈小幅度集中与分散交替上升趋势;协调等级时序变化稳定型城市主要是大连、潍坊、青岛、烟台、威海。②协调度时空聚类区既有空间分异又有重叠交集,社会系统、综合系统、经济系统聚类区依次相互覆盖,生态系统与其它三系统既有重叠区也有独立区。③聚类区内部,社会系统最为稳定,综合系统、经济系统次之,生态系统最为薄弱。  相似文献   

基于多元线性回归分析的页岩气有利区评价新方法 ——以上扬子地区五峰组—龙马溪组海相页岩为例          下载免费PDF全文

周业鑫  赵安坤  余谦  张娣  张茜  雷子慧 《沉积与特提斯地质》2021,41(3):387-397

本文以四川盆地及其周缘五峰组—龙马溪组页岩气评价为例,总结了页岩气有利区优选的储层参数、保存参数和压力系数等参数,量化了各关键参数平面分布,运用多元线性回归分析方法计算了参数权重,通过多参数加权叠加公式建立了多元线性回归模型:有利区=-0.317+0.75×埋深+0.285×TOC+0.148×RO+0.093×孔隙度...  相似文献   

川中地区中二叠统栖霞组滩控岩溶型白云岩储层特征及主控因素   总被引：1，自引：1，他引：0  

芦飞凡  谭秀成  王利超  唐青松  肖笛  董少峰  苏成鹏  潘政屹 《沉积学报》2021,39(2):456-469

四川盆地中部地区栖霞组的白云岩是该区主要储层,储层成因的主流观点是热液白云岩化.目前勘探实践发现,优质储渗体形成与早期相控岩溶作用有关.通过取芯及测录井资料进行了详细分析,研究结果表明,该类白云岩储层主要位于栖霞组中上部颗粒滩发育的地层中,按其宏微观产出状态可分为溶斑状云岩、溶洞充填云岩、针孔状基质云岩和致密基质云岩....  相似文献   

Distribution patterns of interstitial polychaetes in sandy beaches of southern Brazil   总被引：1，自引：0，他引：1  

Maikon Di Domenico  Paulo da Cunha Lana  & André R. S. Garraffoni 《Marine Ecology》2009,30(1):47-62

This study describes the distribution patterns of interstitial polychaetes along morphodynamic gradients on six exposed sandy beaches in Santa Catarina and Paraná (South Brazil). Three random transects were sampled at two points on each beach, one at the swash and another at the surf zone, in winter and summer conditions. Six sediment replicates were collected at each sampling point using a corer of 4.6 cm internal diameter that removed 10 cm into the sediment. Abundance and composition of interstitial polychaete were correlated to wave height, slope, grain size, CaCO₃, chlorophyll a , omega indexes, temperature and relative tide range using a canonical correspondence analysis (CCA). A factorial ANOVA showed that taxa richness, mean density and Shannon's diversity were significantly higher at the reflective beaches, but average values differ significantly between transects and these differences change according to the beach zones on both sampling dates. PERMANOVA showed that polychaete associations differ among transects according to the beach zones. The composition of interstitial polychaete associations was significantly correlated to beach morphodynamics and features (P < 0.01). Polychaete associations of reflective beaches were more diverse than in other morphodynamic states. Intermediate beaches may also sustain diverse associations due to temporal variability of the morphodynamic patterns. Beaches presenting extreme dissipative morphodynamics and compacted sediments appear to be unfavourable for the occurrence of interstitial polychaetes.  相似文献   

基于Supernatural GIS的复杂三维模型建模方法研究     

徐克科  姚笛 《测绘通报》2009,(7)

建立基于Supernatural GIS的复杂三维模型,提出城市复杂三维模型建立的技术路线、关键技术及解决方案,并以实例验证该方法的可行性。  相似文献   

影响龙须菜果孢子体形成内外因素的初步研究     

杨金鑫  张赢月  杨泽  闫昊  徐涤  张学成 《中国海洋大学学报(自然科学版)》2021,51(3)

龙须菜是中国重要的人工栽培海藻,主要用途是琼胶生产原料和鲍鱼饵料。目前龙须菜大规模栽培采用的是人工夹苗的方式,而其孢子采苗的生产方式也得到越来越多的关注。本文将人工培育的由四分孢子萌发长成的一对龙须菜雌、雄配子体进行受精,测试了雌雄配子体藻枝部位、温度、硝酸盐浓度等因素对果孢子体形成过程的影响,结果表明:龙须菜雌配子体藻枝的不同等级分枝表现出不同的生殖力,一级分枝最尖端新生细胞的成熟速度快于其它等级;温度对果孢子体形成有极显著影响(P<0.01),20℃为最适温度;硝酸盐浓度没有显著影响。  相似文献   

两个龙须菜新品系经济性状及琼胶特性的初步研究   总被引：1，自引：0，他引：1  

陈伟洲  徐涤  王亮根  孟琳  杜虹  张学成 《中国海洋大学学报(自然科学版)》2009,39(3)

2008年2～5月在广东省南澳县深澳海区对选育的龙须菜新品系07-1,07-2和对照组福建宁德栽培的981品系进行海上栽培比较试验,测定了3个品系的藻体日平均生长速率,试验了敌害生物(藻钩虾和团水虱)对3个品系的影响,比较了琼胶特性.结果显示,在水温11～20 ℃,盐度32.4～32.8的条件下,品系07-1,07-2的藻体日平均生长速率分别为3.8%/d和4.1%/d,宁德栽培品系的藻体日平均生长速率为3.2%/d.品系07-1,07-2的生长适应水温下限为16 ℃,比宁德栽培品系降低了2 ℃.与宁德栽培的981品系相比较,选育的龙须菜品系07-1,07-2对藻钩虾和团水虱有较强的耐受能力.品系07-1,07-2的琼胶含量比福建宁德栽培的981品系分别提高10.0%和14.4%,凝胶强度也分别提高了5.46%和14.5%,表明2个新品系具有潜在的推广应用价值.  相似文献   

裂谷盆地构造热演化的数值模型及在南海北部的应用   总被引：3，自引：0，他引：3  

廖杰  周蒂  赵中贤 《热带海洋学报》2009,28(6):41-51

在沉积盆地的定量模拟研究中,建立各种数值模型是研究的基础。由于裂谷盆地在科学研究和油气勘探上的重要性,对其数值模型的研究一直受到高度重视,提出了众多理论模型。本文选择影响较大的或对南海被动陆缘研究有重要作用的数值型进行介绍,包括最基础的McKenzie瞬时拉伸模型,以及后来发展起来的限时拉伸模型、单剪伸展模型、挠曲悬臂梁模型、伸展随深度变化的模型和多幕拉伸模型。重点介绍各个模型的基本假设、应用条件、盆地演化的数学表达式,分析各模型之间的异同点和相互关系。文中还列举了南海北部的一些研究实例,以帮助深入理解不同数值模型的方法和应用。  相似文献   

The interannual variability of the surface eddy kinetic energy in the Labrador Sea   总被引：2，自引：0，他引：2  

Hao Luo  Annalisa Bracco  Emanuele Di Lorenzo 《Progress in Oceanography》2011,91(3):295-311

The variability of the surface eddy kinetic energy (EKE) in the Labrador Sea is investigated with a suite of numerical integrations using a regional ocean model. Simulations are performed over the period 1980–2001 and are compared to satellite observations over the last 9 years. The surface EKE pattern in the basin is dominated by a region along the West coast of Greenland where eddies, mainly anticyclonic, are formed by instability of the main currents flowing over the continental slope, consistent with previous idealized results. Here the interannual changes are linked to the shear of the incoming boundary current system imposed as boundary condition to the model domain. The highly variable strength of the East Greenland current at the northeast boundary, derived from the Simple Ocean Data Assimilation (SODA) reanalysis, strongly influences the vortex formation.In the center of the Labrador Sea, where deep convection occurs, a statistically significant portion of the modeled interannual surface EKE variability is correlated with the local atmospheric forcing, and both heat and wind fluxes play an important role and can be adopted as predictors at a lag of 2–3 months. The Arctic Oscillation index can also be used as a remote indicator of the atmospheric fluxes, but with lower skill than local measurements. In contrast the North Atlantic Oscillation index does not correlate significantly with the surface EKE at intraseasonal and interannual scales. The analysis of altimeter data over the 1993–2001 supports the existence of this asymmetry between the regime locally forced by the atmosphere in the central basin, and the regime remotely forced by the incoming boundary current along the west Greenland coast. Those results have important implications for monitoring and predicting the surface eddy kinetic energy variability in the Labrador Sea.  相似文献   

珠江口滨海湿地退化现状、原因及保护对策   总被引：1，自引：0，他引：1  

李团结  马玉  王迪  王爱军  周英 《热带海洋学报》2011,(4)

2007年和2008年秋季对珠江口滨海湿地进行了环境现状综合调查,结果表明,珠江口滨海湿地退化主要表现在4个方面:天然湿地面积减少、湿地生产力不断下降、湿地环境状况持续恶化和湿地景观破碎化。珠江口滨海湿地退化的原因主要为滩涂开发与围填海、污染物排放、养殖污染、海平面上升、过度捕捞、海砂开采和港口码头建设以及水土资源开发等因素。滨海湿地保护与利用对策主要有:制定有关滨海湿地保护的法律法规和湿地保护与利用规划;加强人才队伍建设和滨海湿地有关技术研究;建立滨海湿地动态监测体系;加大滨海湿地保护区建设的力度;加强宣传和教育。  相似文献