Distribution and Chain Pattern of Liquefie Natural Gas Industry in China     

ZHANG Yaoguang  ZHAO Yonghong  CHANG Hongwei  WANG Dan  MENG Zhaobin 《中国地理科学(英文版)》2007,17(3):203-209

The production and consumption of natural gas in China has been developing rapidly in recent years. It is expected that the annual growth rate of the demand for natural gas will reach 12% in the next 15 years, and the gas consumption in the primary energy will increase from 0.3% to 10% or more by 2020. However, since the supply of natural gas cannot satisfy the requirements, China has begun to build liquefied natural gas （LNG） terminals in the coastal regions such as Guangdong and Fujian, and solve this problem by importing LNG from foreign countries. LNG needs to be transported by LNG ships from abroad. With the rapid growth of global gas production, the volume of LNG trade also increases, and the interregional production increased from 0.3% in 1970 to 26.2% in 2004. So, we need LNG ships more than before. This article puts forward the distribution of LNG ships and the speculation of the future of LNG transportation based on the studies on foreign LNG production, the LNG trade, the building of LNG ships, the LNG transportation, the chain model of LNG distribution, etc.  相似文献   

临沂市全力打造阳光土地整理市场     

冯连伟  刘洪建  杜源泉  苏超 《山东国土资源》2007,23(9):38-39

土地开发整理是利在当代、功在千秋的“造福工程”，各级政府投入了大量的资金，如何把好事办好是摆在国土资源部门面前的一件大事。自2002年以来，临沂市实施国家和省、市、县4级土地开发整理复垦项目1200余个，项目总规模达10万余公顷，新增耕地2万余公顷，有力地支持了当地经济和社会的发展，土地开发整理成为实实在在的富民工程、德政工程、民心工程。2007年4月，山东省土地开发整理工作会议在临沂市莒南县召开，临沂市国土资源局在会上介绍了建立阳光土地整理市场的经验和做法。  相似文献   

Nonextensivity and the power-law distributions for the systems with self-gravitating long-range interactions     

Du Jiulin 《Astrophysics and Space Science》2007,312(1-2):47-55

By a natural nonextensive generalization of the conservation of energy in the q-kinetic theory, we study the nonextensivity and the power-law distributions for the many-body systems with the self-gravitating long-range interactions. It is shown that the power-law distributions describe the long-range nature of the interactions and the non-local correlations within the self-gravitating system with the inhomogeneous velocity dispersion. A relation is established between the nonextensive parameter q≠1 and the measurable quantities of the self-gravitating system: the velocity dispersion and the mass density. Correspondingly, the nonextensive parameter q can be uniquely determined from the microscopic dynamical equation and thus the physical interpretation of q different from unity can be clearly presented. We derive a nonlinear differential equation for the radial density dependence of the self-gravitating system with the inhomogeneous velocity dispersion, which can correctly describe the density distribution for the dark matter in the above physical situation. We also apply this q-kinetic approach to analyze the nonextensivity of self-gravitating collisionless systems and self-gravitating gaseous dynamical systems, giving the power-law distributions the clear physical meaning.   相似文献   

Microphytobenthic biomass and species composition in intertidal flats of the Nakdong River estuary, Korea   总被引：1，自引：0，他引：1  

GuoYing Du  Moonho Son  Misun Yun  Soonmo An  Ik Kyo Chung   《Estuarine, Coastal and Shelf Science》2009,82(4):663-672

Intertidal microphytobenthos (MPB) were investigated monthly from August 2006 to March 2008 at four different sites in the sand flats of Nakdong River estuary, Korea. Samples of surface sediment (ca. 1 cm) were collected, and chlorophyll a was extracted as biomass estimation. Species identification and enumeration were carried out by light microscopy, assisted where necessary by scanning electronic microscopy. Biomass varied between 0.47 and 16.58 μg cm⁻³, abundance changed from 5.25 to 414.75 × 10³ cells cm⁻³, while the Shannon diversity indexes ranged between 0.69 and 2.35 H′. Thirty-nine MPB taxa were identified, primarily composed of epipelic diatoms, among which Amphora and Navicula were the most abundant genera. Based on the biomass, abundance, species composition and their dynamics, MPB assemblages of sampling sites were grouped into three distinct communities corresponding to their sediment composition characteristics. Multivariate correlation analysis revealed that biomass was positively related to mud and very fine sand, negatively related to fine and medium sand, but not significantly related to environmental factors such as pore water nutrients, light intensity and salinity, which fluctuated rapidly during emersion period. Cluster analysis corroborated the division of MPB communities according to site types on seasonal scales, and also showed seasonality between sites by cluster of all summer groups. Principal component analysis identified that variability in species composition was significantly affected by mud, very fine sand, fine sand, light intensity, and sediment temperature. This study suggests that sediment composition plays an important role in the functioning of intertidal MPB communities in estuarine ecosystems.  相似文献   

Long-term influence of maritime access works on the distribution of cohesive sediments: analysis of historical and recent data from the Belgian nearshore area (southern North Sea)     

Michael Fettweis  Jean-Sébastien Houziaux  Isabelle Du Four  Vera Van Lancker  Cecile Baeteman  Mieke Mathys  Dries Van den Eynde  Frederic Francken  Stanislas Wartel 《Geo-Marine Letters》2009,29(5):321-330

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会东县老炉房特大型岩崩发育特征及稳定性分析     

沙德智  陈关顺  杜静虹 《四川地质学报》2001,21(3):177-179

对老炉房特大型岩崩的形成特征作了论述，对岩崩的规模、成因、危害性及发展趋势作了分析，提出了防灾的具体意见。  相似文献   

Blast Damage and Blast Dilution Control: The Application of Bulk Emulsion Systems at the WMC St Ives Junction Mine     

T. M. Law  J. May  A. T. Spathis  A.T. Du Plessis  A. M. Palmer 《Fragblast: International Journal for Blasting and Fragmentation》2001,5(1):1-20

The application of modern bulk emulsion explosive systems at an underground gold mine resulted in a 57% improvement in gold dilution. While this improvement is impressive and could be expected to be achieved at other sites, the work required to assess and demonstrate the benefits is painstaking. Forty-eight rings involving a total of approximately 50 000 tonnes of ore were monitored using various modern surveying instruments over a 6-month period. The geometric data included blasthole locations and deviation, and the cavity monitoring of stopes. Implementation of a bulk emulsion system not only provided logistical benefits but it also has the desirable explosive properties associated with reducing the effects of blast damage and blast dilution.  相似文献   

青藏高原对中国西部自然环境地域分异的效应   总被引：9，自引：11，他引：9       下载免费PDF全文

郑度 《第四纪研究》2001,21(6):484-489

近几百万年以来青藏高原的强烈隆升对中国西部地区自然环境地域分异的影响十分明显。它强化了自第三纪以来西北地区的干旱化 ,形成山地湿岛与荒漠绿洲并存 ,导致亚洲干旱核心区域的出现。藏东南水汽通道作用显著 ,横断山区发育着独特的干旱河谷。山地垂直带谱类型的分布模式揭示了青藏高原自然景观的地带性分异规律 ;高原地势格局和大气环流的共同作用 ,制约着高原本身自然地域分异的特点 ,形成独特的自然地域系统格局。  相似文献   

高原地区降水性质浅谈     

杜清友 《高原山地气象研究》2001,21(1)

高原地区降水性质与平原地菜有相同之处，又有其独特的地方，这里就个人经验小叙如下： 　　首先从降水的特征及所见的现象看，阵性降水一般开始和停止都较突然，降水强度变化很快 ，骤降骤止，天空会出现时而昏黑时而明亮开朗的现象，伴有雷暴或闪电；而非阵性降水中 ，连续过程中强度变化很小；间隙性降水虽时降时止或强度变化时大时小，但这种变化的过 程很缓慢，天空也看不出有什么明显变化。 　　其次从气象要素变化看，压、温、湿、风自记记录明显起伏变化的伴有的降水一般为阵性。 如有系统过境时，温度计迹线陡降，湿度计迹线陡升，气压计有显著升降，风向风速出现较 大变化；若是非阵性降水则上述各要素变化不明显或缓慢过渡。  相似文献   

近20年来热带印度洋与热带太平洋海气系统相互作用特征的诊断研究   总被引：14，自引：4，他引：14       下载免费PDF全文

殷永红  史历  倪允琪 《大气科学》2001,25(3):355-371

利用1979年1月～1998年12月的月平均海表温度(SST)、向外长波辐射(OLR)和l000hPa纬向风速等NCEP/NCAR再分析资料，对近20年来热带印度洋与太平洋海温异常(SSTA)及相关的环流特征量进行综合分析和研究，发现热带印度洋的内部耦合动力特征模态—偶极子模的强度，存在着年代间的差异，80年代偏弱，90年代偏强。热带印度洋与热带太平洋海气耦合系统之间存在着相互作用，80年代热带印度洋的SSTA主要是对太平洋ENSO的响应，90年代太平洋ENSO的异常发展在一定程度上是受印度洋偶极子模态异常活跃影响的结果。从观测资料诊断分析的角度，找出了90年代后ZC耦合模式对ENSO事件预报失败的可能原因。  相似文献