渤海湾盆地A油田沙一、沙二段混合沉积模式

从岩石学特征入手,结合古地貌及沉积动力学分析,对渤海湾盆地A油田沙一、沙二段混合沉积模式进行分析,结果表明,A油田沙一、沙二段主要发育扇三角洲沉积,同时发育鲕粒滩、生物碎屑滩、碎屑滩和混积滩,同时期存在的多种沉积相类型是形成混合沉积的环境条件。根据岩性组合特点及空间分布规律,对研究区混合沉积类型细分为四类:相突变混合沉积、相过渡带混合沉积、以碎屑岩相为主的混合沉积和以碳酸盐岩相混合沉积四种类型,其中以碎屑岩相为主的混合沉积和以碳酸盐岩相为主的混合沉积是研究区主要的混合沉积类型。     

Lipids and Fatty Acids of the Gonads of Sea Urchin Diadema setosum (Echinodermata) From the Coastal Area of the Nha Trang Bay,Central Vietnam

The sea urchin Diadema setosum is edible and desirable as food by locals in central Vietnam and a promising target for potential fishing. The lipid profiles of the gonads of the sea urchin inhabiting the coastal area in Nha Trang Bay are studied for the first time. The determination of the content of the total lipids (TL), total phospholipids (PL), monoacylglycerols (MAG), diacylglycerols (DAG), triacylglycerols (TAG), cholesterol (Chol), sterol esters, and free fatty acids (FFA) is analyzed by high-performance thin layer chromatography (HPTLC); the phosphatidylserine (PS), phosphatidylethanolamine (PE), phosphatidylinositol (PI), phosphatidylcholine (PC), lysophosphatidylcholine (LPC), and sphingomyelin (SM) are determined by high-pressure liquid chromatography (HPLC); and the fatty acid levels of TLs are identified using gas chromatography (GC). Non-polar TAG, FFA, Chol, and DAG dominated. The content of total PL is significant. PC is abundant among PL fractions, followed by PE, PI, and PS. The TLs contain a high proportion of PUFA, mainly due to arachidonic fatty acid and eicosapentanoic fatty acid. The (n−6)/(n−3) ratio is 1.68, and the atherogenic and thrombogenic indexes of D. setosum are 1.13 and 0.73. The results can be used in the development of marine bioprospecting and methodological approaches for the creation of functional substances.     

环杭州湾“V”型组合城市建设初探

环杭州湾上海、杭州、宁波等六城市 ,城市之间社会、经济相互联系密切 ,交通等基础设施日益完善 ,特别是杭州湾大桥的建设 ,形成了沪、杭、甬之间的两小时交通“金三角”区。当今世界城市群、城市带、城市圈在各地兴起 ,杭州湾地区完全有可能形成环杭州湾“V”组合城市。在分析杭州湾城市发展现状和城市组合重要作用的基础上 ,提出了环杭州湾组合城市空间布局的设想     

A preliminary modeling analysis of water quality in Lake Okeechobee, Florida: Calibration results

To gain understanding of nutrient and phytoplankton dynamics in Lake Okeechobee, Florida, we developed and applied a deterministic, mass balance, water quality model at the whole-lake spatial scale. The model was calibrated to a comprehensive set of field data for 1985–1986, and then used to simulate the period 1973–1992. The model represented the mean behavior of in-lake total phosphorus, dissolved available phosphorus, total nitrogen and chlorophyll a concentrations reasonably well during the calibration period. The model did not represent dissolved available nitrogen concentrations very well, nor did it capture much of the observed temporal variability during the calibration period. The model results identified important information needs to improve our understanding of the nitrogen cycle including, sediment-water nitrogen fluxes, denitrification and nitrogen fixation. Results from the 1973–1992 simulation indicated that model assumptions and/or calibration parameters were not uniformly applicable over this period. Total phosphorus concentration results from this model were compared with results from two site-specific, empirical loading models for the lake. None of these models represented annual average concentrations uniformly well over the entire 20-year period, and none captured much of the observed inter-annual variability. External total phosphorus loadings and lake hydrology are not sufficient to fully describe total phosphorus dynamics in Lake Okeechobee. Other important factors are diffusive sediment-water fluxes, wind-induced sediment resuspension, and the spatial heterogeneity in the lake.     

中高层配筋混凝土小型空心砌块剪力墙结构试点工程设计施工总结

中高层配筋混凝土小型空心砌块剪力墙结构在我国还是一种新的结构形式,具有节约钢材、节省模板、降低综合造价等优点。但在结构设计计算以及施工方面还缺乏经验,相应的技术也不够配套。为在高烈度区建造和推广此类结构,通过在8度区建造30m高10.5层的试点工程,籍以总结设计、施工经验,供借鉴。     

Phytoplankton development and ecological status during a cyanobacterial bloom in a tributary bay of the Three Gorges Reservoir, China

Reservoirs can provide suitable conditions for cyanobacterial bloom development, which may impact on water quality and biological communities. Weekly surveys in a cyanobacterial bloom process were carried out in the mainstream and Xiangxi Bay of the Three Gorges Reservoir (China), from June 6 to July 18 in 2008. By application of the phytoplankton functional group approach, the spatiotemporal pattern, impact factors, and the ecological status based on Q index (assemblage index) were analyzed. The depth of euphotic layer was apparently the key factor driving the phytoplankton functional group variations. Longitudinal patterns of phytoplankton distribution were detected during this bloom: in the beginning phase, groups D (mainly Stephanodiscus hantzschii) and B (Cyclotella stelligera) dominated in the mainstream of the Three Gorges Reservoir and the mouth area of Xiangxi Bay, group Y (Cryptomonas species) dominated in the upper area, while groups J (mainly Pediastrum duplex), F (mainly Sphaerocystis schroeteri) and G (Pandorina morum and Eudorina elegans) were important in other areas; in the mid phase, group M became absolutely dominant in the whole region; and in the ending phase, besides groups M and Y, groups X2 (Chroomonas acuta, Pyramimonas nanella, etc.) and Lo (Ceratium hirundinella) became more important in the lower and upper area respectively. Generally the ecological status was bad, temporally varied with the bloom process. No spatial difference of ecological status was found in the mainstream, while longitudinal patterns in Xiangxi Bay were detected for different phases: firstly a few sites had relatively better status than the others, then nearly all the sites were in the bad condition, and at last the status in the downstream was better than that in the upstream. The longitudinal patterns of ecological status were related to phytoplankton distribution, disturbed by jacking from the downstream and flood from the upstream of Xiangxi Bay.     

建筑防火技术在民用建筑设计中的综合运用

结合民用建筑防火设计实践，从建筑的平面布局和布置方法、防火防烟的分区、安全疏散问题、装修材料的选择等方面论述了建筑防火技术，从而提高建筑物的防火设计水平，减少火灾的发生。     

辽东地区构造演化及其对构造样式的影响

基于三维地震数据、岩心和测井数据,将辽东地区新生界自下而上划分为孔店组-沙河街组、东营组和馆陶组、新近系-第四系三套构造层。构造层的发育分别对应于盆地演化的强烈伸展断陷期、强走滑断坳转换期和热沉降坳陷期三个阶段。对应于各阶段构造的差异活动,各构造层断裂的发育特征存在差异。下部构造层以发育NNE向正断层为主,断裂组合以伸展构造样式为主;中部构造层以NNE向走滑断裂为主,断裂组合以走滑构造样式为主;上部构造层多为NE向次级断裂,断裂发育组合以弱走滑构造样式为主。     

基于间隔智能组件的二次系统架构

针对智能变电站继电保护的发展现状，提出一种基于间隔智能组件的二次系统构架，并基于该构架对间隔智能组件提出解决方案，包括线路/母联间隔智能组件技术方案、主变间隔智能组件技术方案以及基于共享网络的跨间隔保护技术方案。面向变电站间隔的智能组件纵向集成多种业务功能，设备光口数量大为减少，采用短电缆进行采集和跳闸，有效提高保护速动性；基于共享网络的跨间隔保护充分利用共享数据，结构简单，可靠性高。上述方案解决了智能变电站光纤众多、速动性低、可靠性不高等问题。     

Driving factors of the flushing time of bays formed where tributaries enter a reservoir

Flushing time is an integrative parameter that can represent water exchange capacity and sensitivity to pollution threats. As bays formed where tributaries enter the Three Gorges Reservoir of China have experienced frequent algal blooms over the past decade, we examine the spatially variable flushing time of a typical tributary bay (Xiangxi Bay) by numerical tracer experiments. First, the tracer concentration reduction could be approximated well by a double exponential decay curve, and the local flushing time of Xiangxi Bay is determined using key flushing coefficients. Second, a sensitivity analysis is performed to examine the influence of upstream inflow, temperature difference, wind, water level of the reservoir, and daily water level fluctuation on the spatial variation in local flushing time. Finally, according to local flushing time values and the sensitivity analysis results, the bay can be generally characterized by three zones: riverine, transitional, and mainstream‐influenced zones. In particular, the local flushing times in the riverine zone are mainly affected by the upstream inflow. The difference in temperature between the reservoir mainstream and Xiangxi Bay is the main forcing in the transitional and mainstream‐influenced zones. This study is the first to investigate different driving factors for flushing time in a typical reservoir tributary bay. The findings provide insights on the transport processes in such water bodies, suggesting the possibility of using the longitudinal zonation of flushing time for reservoir management.