针对一般倾角的走滑/倾滑位移理论公式的改进

对Savage走滑位移公式加以改进,使其在反映走滑断层特征的基础上包含断层的倾角信息,体现断层倾角对地表位移的影响。当断层不是直立时,结论如下：1）震间形变曲线的中心不在断层出露地表处,而在断层闭锁与滑动分界线在地表的投影处|2）断层倾角δ、断层闭锁深度d之间存在几何关系：tanδ=d/doffset|3）由于同震沿断层面破裂,其位置与震间形变曲线中心不一致,导致同震时上下盘位移不对称。此改进同样适用于倾滑断层。     

1991 ～ 2004 年GPS 观测到的中国大陆地壳动态变形特征

利用1991～2004年间的GPS资料和最小二乘配置方法计算了中国大陆现今地壳变形及其动态变化,结果表明,1991 ～2004年间中国大陆整体运动特征变化不大;西部特别是青藏高原及川滇地区应变速率存在显著高值;不同期的GPS资料显示地壳的动态变化与区域强震活动相关,如2004年的GPS资料明显指示出2001年昆仑山口西Ms8.1地震的震后变形特征.     

中国邮轮旅游竞争潜力测度

本文在分析邮轮旅游核心产业要素及竞争潜力构成的基础上,构建邮轮旅游竞争潜力评价指标体系,从旅游资源禀赋、邮轮旅游经营绩效、企业运营能力、金融保险业服务能力、交通保障能力、城市支撑能力等方而进行分析评价.并运用因子分析法对我国沿海8大邮轮旅游重点城市进行评价分析;依据评价结果,将8大邮轮城市划分为邮轮旅游竞争优势区、较优势区和一般优势区的3个层级.提出未来中国邮轮旅游将形成以上海为邮轮母港.以深圳为区域中心港,辅以宁波、厦门、海口等挂靠港的对台湾、东南亚的南方邮轮旅游区;以及以天津为区域中心港,辅以青岛、大连的对日、韩的北方邮轮旅游区的整体空间格局.     

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???????????1999??2007???GPS?????????????????????????????????????????????β??λ????????????????????У?1999??2001???????????????????м??????????????????????????????????????????1.0 mm/a???????????????1.35 mm/a;2004??2007??????????????????????0.04??1.59 mm/a???????????????????????2001??2004??????????????????????????????3?????ξ?????????????????????????????0.7??1.55 mm/a?????????????????????????????1.0 mm/a??     

Laboratory study on the ecological impact of sophorolipid used for harmful algae elimination

We studied the role of sophorolipid in inhibiting harmful algae bloom (HAB). Different sophorolipid concentrations were tested on marine microalgae, zooplankton, fish, and bivalve (Mytilus edulis) in laboratory. The result shows that sophorolipid could inhibit the growth of algal species selectively. Among three algae species selected, Platymonas helgolandica var. tsingtaoensis was promoted with increasing sophorolipid concentration; Isochrysis galbana was inhibited seven days later in sophorolipid concentration below 40 mg/L; and Nitzschia closterium f. minutissima was inhibited obviously in only a high sophorolipid concentration over 20 mg/L. Therefore, sophorolipid in a low concentration at <20 mg/L could remove certain harmful algae species effectively without harming other non-harmful microalgae. For other animals, sophorolipid could inhibit the growth of ciliate Strombidium sp. by 50% at 20 mg/L sophorolipid concentration after 96 h. The concentration in 96-h LC₅₀ for Calanus sinicus, Neomysis awatschensis, Lateolabrax japonicus, and Paralichthys olivaceus was 15, 150, 60, and 110 mg/L, respectively. The 24 h LC₅₀ value for Artemia salina was 600 mg/L. The relative clearance rate of mussel Mytilus edulis decreased to 80%, 40%, and 20% of the control group after being exposed to 20, 50, and 100 mg/L sophorolipid for 24 h. Therefore, the toxicity for mitigation of harmful algae bloom at previously recommended concentration of 5–20 mg/L sophorolipid is low for most tested organisms in this reaserch.     

Regional features of the temperature trend in China based on Empirical Mode Decomposition

By the Empirical Mode Decomposition method, we analyzed the observed monthly average temperature in more than 700 stations from 1951–2001 over China. Simultaneously, the temperature variability of each station is calculated by this method, and classification chart of long term trend and temperature variability distributing chart of China are obtained, supported by GIS, 1 km×1 km resolution. The results show that: in recent 50 years, the temperature has increased by more than 0.4℃/10a in most parts of northern China, while in Southwest China and the middle and lower Yangtze Valley, the increase is not significant. The areas with a negative temperature change rate are distributed sporadically in Southwest China. Meanwhile, the temperature data from 1881 to 2001 in nine study regions in China are also analyzed, indicating that in the past 100 years, the temperature has been increasing all the way in Northeast China, North China, South China, Northwest China and Xinjiang and declining in Southwest China. An inverse ‘V-shaped’ trend is also found in Central China. But in Tibet the change is less significant.     

The hypermedia data model based on the infinity image

This paper presents the hypermedia data model based on the infinity RS image information system we have developed.The hypermedia data model consists of different semantic units called nodes,and the associations between nodes are called links.This paper proposes three kinds of nodes (interior node,physical node and complex node) and two kinds of links (plane network structure link,hyper-cube network structure links).The hypermedia information system,based on the model and the basic data layer (the infiniy RS image),represents a digital globe.An approach to the "Getting Lost in the Hyper-space" problem is presented.The approach using the hypermedia data model is an efficient way of handling a large number of RS images in various geographical information systems.     

利用MEMapGIS快速绘制地质图件方法探讨

以往地质工作中野外工作和图件编制往往脱节,大大降低了报告编制的效率。近些年涌现的快速绘制图件的方法均不具备普遍适用性。该文利用MEMapGIS软件实现由地质人员在野外快速绘制槽探素描图和钻孔柱状图等图件。该方法大大提高了图件绘制效率,同时减少了人为因素造成的误差,降低了人员成本。     

Effects of different phosphorus concentrations and N/P ratios on the growth and photosynthetic characteristics of <Emphasis Type="Italic">Skeletonema costatum</Emphasis> and <Emphasis Type="Italic">Prorocentrum donghaiense</Emphasis>

The effects of different phosphorus (P) concentrations (0.36, 3.6, and 36 μmol/L corresponding to low-, middle-, and high-P concentration groups, respectively) and nitrogen (N)/P ratios on the growth and photosynthetic characteristics of Skeletonema costatum and Prorocentrum donghaiense were studied. For both species, the high-P (HP) concentration group showed the greatest algal density and highest specific growth rate. Changes in the maximum efficiency of photosystem II (F _v /F _m ) were monitored under the various P and N/P conditions. The largest decrease in F _v /F _m was in the low-P (LP) group in S. costatum and in the HP group in P. donghaiense. There were high rapid light curves and photochemical quantum yields (Φ _PSII) for S. costatum in the HP group, while the actual photosynthetic capacity was higher in P. donghaiense than in S. costatum in the MP group. Under eutrophic but relatively P-restricted conditions, P. donghaiense had higher photosynthetic activity and potential, which could cause this dinoflagellate to increasingly dominate the phytoplankton community in these conditions. Under the same P concentration and N/P ratio, P. donghaiense had a larger relative maximum rate of electron transport and higher Φ _{PS II} values than those of S. costatum. These differences between P. donghaiense and S. costatum may explain the interaction and succession patterns of these two species in the Changjiang (Yangtze) River estuary from a photosynthesis perspective.     

Occurrence modes of silver in the Ni-Mo-PGE polymetallic layer of the Lower Cambrian black shales in Zunyi,Guizhou Province,South China

The Ni-Mo-PGE polymetallic mineralization of the Lower Cambrian black shales locate in Zunyi, South China and contain abundant noble metals such as Ag, Au and PGE, and especially Ag with average concentration of 64×10-6. The occurrence modes of Ag have been investigated using methods of selective chemical dissolution and transmission electron microscopy. The results demonstrate that the occurrence modes of Ag are complex and diversiform. It might be associated with clay minerals, organic matter, sulfides and also occurred as native silver and sulfides with nanometer in size. Combined with results of previous studies, we suggest that the sulfides, clay minerals and organic matter which hosted in the Ni-Mo-PGE polymetallic ores of black shales can play the roles of important reduction and adsorption geochemical barriers for the enrichment and distribution of silver. This study further implies that the selective chemical dissolution and transmission electron microscopy may pave the way to study the occurrence modes of other noble metals in black shales.