基于道路布局的城市区域热环境数值模拟研究

对整个长沙市城区建筑及道路进行建模,并采用CFD软件Fluent对长沙市区域热环境进行模拟分析,结合红外线温度图对比验证.研究结果表明:绿地、水体覆盖面积对缓解城市热岛效应、改善城市空气质量有很大的作用;城市道路布局与城市区域热环境有很大的关联,城市道路的合理设计和布局可以很好地利用城市主导风进行自然通风;高层建筑布局与道路走向设计应当相契合,前后、高低错落布置,减少大面宽建筑,充分利用城市道路通风改善城市区域热环境.     

蛋坨子岛有毒种子植物多样性研究

蛋坨子岛有毒种子植物共计13科15属15种,占蛋坨子岛现有种子植物种数的28.3%.其中灌木1种,藤本3种,草本11种;有毒植物10种,小毒植物5种.本文分析了蛋坨子岛有毒种子植物种类及分布格局形成的原因.     

川西雀儿山印支晚期岩浆事件：花岗闪长岩锆石U-Pb年代学证据

雀儿山花岗岩体位于川西义敦岛弧北端,由似斑状花岗岩、伟晶质和细晶质花岗岩脉以及岩体边部的花岗闪长岩组成。这些花岗闪长岩石属于高钾钙碱性的花岗岩石系列,其稀土元素配分曲线呈向右缓倾型,轻稀土元素富集明显,Eu负异常明显,表明岩浆演化过程中经历了部分斜长石结晶分离过程。花岗闪长岩LA-ICP-MS锆石U-Pb年龄值为217.2~223.6 Ma,表明其成岩年龄为晚三叠世。构造环境判别图解显示,川西雀儿山花岗闪长岩形成于与甘孜—理塘结合带向西俯冲有关的火山弧构造环境。     

News from a small island – first record of a freshwater shrimp (Decapoda,Atyidae, Caridina) from Peleng,Banggai Islands,Indonesia

The Indonesian island Sulawesi is well known for its fascinating fauna. Among the atyid and palaemonid freshwater shrimps described from Sulawesi are also a number of endemic species. In contrast, freshwater shrimps have never been reported from the nearby and smaller Peleng Island. Here we describe Caridina thomasi sp. nov. as a first record of an atyid freshwater shrimp from Peleng and compare it with atyids from Sulawesi and other localities. The new species is probably endemic to the island and shows some characters never described in the genus Caridina before. However, a molecular phylogeny of atyid shrimps from the Indo‐West Pacific based on mitochondrial DNA (16S) places C. thomasi within a clade of typical species of Caridina. We tentatively assign the new species to the genus Caridina and discuss the possibility of future changes in the classification of species in this genus.     

福清清荣大道立交工程设计

福清清荣大道立交工程为双层互通式立体交叉，采用部份苜蓿形立体交叉与环形平面交叉相结合的方式来实现各个方向的互通．本文介绍了其总体布置、结构设计及存在问题，可作同类工程的设计参考     

黄蜀葵在海南水稻田和坡地栽培的比较试验

为了研究黄蜀葵在海南水稻田和坡地的栽培情况,采用水稻田起高畦种植,干湿交替排灌水,坡地开沟种植,定期喷水等方法进行了比较试验,结果为水稻田产量高,平均每667 m2(亩)产鲜花达954.2 kg;坡地产量低,平均每667 m2(亩)产鲜花仅269.7 kg.结论为黄蜀葵在海南栽培宜选用水稻田,田间水分管理最关键.     

SHRIMP U-Pb zircon dating for Qiashikansayi granodiorite, the Northern Altyn Tagh Mountains and its geological implications

The Qiashikansayi granodiorite is foliated resulting in a granodioritic gneiss. Its geochemical features, such as alumina saturation index(A/CNK) of 0.81-0.99, Na2O/K2O values>1, TiO2 contents <1.0%, LREE enrichment with high fractionation factors, weakly negative or no Eu anomalies, and significant Ba and Ti negative anomalies, suggest that it is similar to a typical island arc pluton. The trace elements of the Qiashikansayi granodiorite are plotted in the island arc field in the tectonic setting discrimination diagrams as well. Cathodoluminescence images demonstrated that the zircons have clear rhythmic crystallized zoning, without any remnant core and new crystallized rim, suggesting the zircons be magmatic ones. Their U and Th contents vary in the range of 574-870 μg/g, and 279-556μg/g respectively, with the Th/U ratio in the range of 0.52-0.68. SHRIMP zircon U-Pb dating yielded the 481.5±5.3 Ma age for the intrusion of the granodiorite, which is coeval with the island arc volcanic rocks in the no     

The zircon SHRIMP chronology and trace element geochemistry of the Carboniferous volcanic rocks in western Tianshan Mountains

The genesis of the Carboniferous volcanic rocks in the Dahalajunshan group, mainly consisting of trachytes and trachy-andesites and distributing widely in western Tianshan Mountains, remains to be controversial. It has been proposed to be relevant to “rift” or “plume”. Detailed petrology and geochemical data presented in this paper show that these volcanic rocks represent typical continental arc magmatism. The volcanic rocks are mainly trachy-andesitic, and the magma source is enriched in LILE, Th and Pb, and depleted in HFSE and Ce. Trace element geochemical study suggests that the basalts could be modeled by 7% -11% partial melt of garnet Iherzolite. The volcanic rocks in the Dahalajunshan group are neither the products of “rift” nor so-called “plume”but represent the continental island arc of the Paleo-Southern Tianshan Ocean. The mantle wedge had been modified by the melt generating in subduction zone during a long evolution history of this island arc. The continental crust materials （i.e. mainly sediment on ocean floor） had been added into island arc through melt in subduction zone. Volcanic rocks occurring in different regions might represent magma eruption in different time. The zircon SHRIMP dating indicates that the ages of the basalt varies between 334.0 Ma and 394.9 Ma. The 13 analyses give an average age of 353.7±4.5 Ma （MSWD = 1.7）. The apparent ages of zircons in trachy-andesite vary between 293.0 Ma and 465.4 Ma. All analyses fall on the U-Pb concordant line and are divided into two groups. 8 analyses produce an average age of 312.8±4.2 Ma （MSWD = 1.7）, which represents the crystallizing age of zircon rims in trachy-andesite. The acquired two ages （i.e. 354 and 313 Ma） belong to the Early Carboniferous and Late Carboniferous epochs, respectively. Thus, the Dahalajunshan group would be separated into several groups with the accumulation of high-quality age dating and data of trace element and isotopic geochemistry, in our opinion.     

海坛岛灌丛群落的地理分布特点

据对海坛岛南部,中部和东北部选取的６个地区２４处样地,３８４ｍ＾２灌丛群落的调查,以地区间灌木种多频度相似性指数作地区聚类和排序分析,得出海坛岛东北部和西部南两个地区组合,它们依海拔和降水量作略有规律的分布。     

珠海万山区海岛旅游资源开发探讨

分析了珠海市我发展旅游业的内部条件及优势与海岛旅游开发的外部环境,提出了万山区海岛旅游开发的定位应充分体现出独特的亚热带海洋特色,在创造海洋文化性和海洋经济性的同时,走高层次、高文化、多方位的发展道路的观点。