栉孔扇贝消化管的组织学观察

运用石蜡切片法和组织化学方法，对栉孔扇贝的消化管进行了研究，结果表明，整个消化管从腔内到腔外，都由黏膜上皮、黏膜肌层、结缔组织和外膜组成。黏膜上皮层由纤毛柱状细胞和杯状细胞组成，基膜很薄，皮下有一层有肌纤维，结缔组织中有丰富的血腔隙，除直肠的外膜为浆膜外，其余皆为纤维膜。纤毛和黏液在食物的运输中起重要作用。胃和晶杆囊上皮能分泌消化酶。胃上上有较弱的碱性磷酸酶和脂酶活性。胃和晶杆囊上皮及纤毛有酸性磷酸酶活性，晶杆囊上皮的核前细胞质中含铁，各部位不含钙。     

山东沿海旅游业可持续发展对策研究

滨海旅游是旅游活动的重要组成部分 ,在我国具有广阔的发展潜力。在讨论了山东沿海旅游业发展中存在的问题的基础上 ,指出发展滨海旅游与滨海和海洋环境之间的相关关系 ,探讨了使山东沿海旅游业可持续发展的主要对策     

秋茄和榕树叶片中正构烷烃分布和单体化合物δ13C值及其光合作用

对深圳福田、阳江、海南新竹红树林秋茄Kandelia candel及海口榕树Ficusm icrocarpa叶中类脂物进行萃取,分离出正构烷烃,通过气相色谱(GC)及色谱-质谱(GC MS)分析,测出了正构烷烃的碳数分布和相对含量.气相色谱-稳定同位素比质谱仪(GC-IRMS)测定了正构烷烃单体化合物的稳定同位素组成δ13C.秋茄叶和榕树叶正构烷烃的碳数分布均为C17C33,主要集中在C23-C31(＞90%).化合物含量最高为C27的有深圳福田秋茄、海南新竹秋茄、海口榕树,而阳江秋茄为C25.单体化合物的稳定同位素δ13C深圳福田秋茄为-31.42‰-34.48‰,阳江秋茄为-31.69‰-33.62‰,海南新竹秋茄为-30.30‰-33.04‰,海口榕树为-29.92‰33.56‰;平均值分别为-32.95‰、32.67‰、31.67‰、-31.74‰.结果表明,秋茄和陆地植物榕树的光合作用都是通过C3途径,是典型C3植物.     

基于DXF的OpenFlight数据创建方法研究

针对虚拟城市仿真系统应用中OpenFlight模型缺乏、建模方式单一,难以构建复杂模型的情况,本文提出基于CAD文件来构建Opeflght模型的方法,在详细分析OpenFlight和DXF的数据组织结构的基础上,设计了基于DXF的OpenFlight数据创建方案并编程实现。通过实例测试证明该方案能快速、完整地进行数据转换,为虚拟城市系统的三维仿真模型构建提供了一条行之有效的途径。     

TOPCON GTS901A机载程序设计

介绍了基于Windows CE嵌入式操作系统,开发了TOPCON智能型全站仪GTS901A机载程序的方法,实现了学习测量、自动测量、数据存储及处理等功能。     

激光扫描点云图像背景交互式滤除

激光扫描系统获取的数据中包含了大量背景信息,给信息提取和表面重建工作带来严重影响,需要有效滤除。依据空间点与平面的位置关系,提出了针对车载激光扫描点云图像背景信息滤除的有效方法,并以OpenGL为工具,开发了一系列点云数据处理工具,能快速、直观、准确地滤除无用背景信息,完整地保留有用的前景信息,从而为大规模三维场景快速重建提供保障。     

Simulation experiment on hydrocarbon generating potential of various source rocks on the northern margin of the Qaidam Basin,Qinghai, China

The northern margin of the Qaidam Basin is one of the main oil-gas exploration areas in western China, where source rocks are composed mostly of Middle and Lower Jurassic dark mud shale, carbargillite and coal. A large number of subsurface and outcrop samples differing in lithology with different types of organic matter were selected for resource evaluation, research and calculation. And among them, 13 samples were used for simulation experiment on hydrocarbon generating potential of various source rocks. At first, two kinds of heating modes were compared through simulation experiment, including single temperature-step heating and continual heating. Perhaps, the process of hydrocarbon generation and expulsion occurred naturally between a close system and an open system. In addition, the first heating mode was convenient, and all its reaction products were involved in the whole thermal evolution, and the final simulation experimental results were basically in consistency with the natural evolution trend Therefore, the first heating mode was adopted and the hydrocarbon yield of every sample was worked out. According to the type and lithology of organic matter and the hydrocarbon yield of samples for simulation experiment, hydrocarbon generation and expulsion mode with three kinds of lithology and five types of source rock has been established to provide the basis for hydrocarbon generation evaluation, research and resource calculation.     

Formation Dynamics and Quantitative Prediction of Hydrocarbons of the Superpressure System in the Dongying Sag

Based on the theory of formation dynamics of oil/gas pools, the Dongying sag can be divided into three dynamic systems regarding the accumulation of oil and gas： the superpressure closed system, the semi-closed system and the normal pressure open system. Based on the analysis of genesis of superpressure in the superpressure closed system and the rule of hydrocarbon expulsion, it is found that hydrocarbon generation is related to superpressure, which is the main driving factor of hydrocarbon migration. Micro fractures formed by superpressure are the main channels for hydrocarbon migration. There are three dynamic patterns for hydrocarbon expulsion： free water drainage, hydrocarbon accumulation and drainage through micro fissures. In the superpressure closed system, the oil-driving-water process and oil/gas accumulation were completed in lithologic traps by way of such two dynamic patterns as episodic evolution of superpressure systems and episodic pressure release of faults. The oil-bearing capacity of lithologic traps is intimately related to reservoir-forming dynamic force. Quantitative evaluation of dynamic conditions for pool formation can effectively predict the oil-bearing capability of traps.     

国土资源数据分析及其整合与集成

本文详细分析了国土资源数据特点、综合数据来源、产生方式和使用方法等方面,对数据进行了分类,比较了不同的数据格式。在此基础上,阐述了国土资源数据的集成框架,讨论了数据整合和集成的方法和流程,提出了数据整合与集成的三种框架问题。     

砂芯的第四纪环境遗迹研究值得重视——第四纪孢粉环境信息对全球环境研究的倡议

1996年春,天津地质调查中心海岸带与第四纪地质研究所参加了新疆地矿局在塔克拉玛干沙漠的地下水勘查工作,负责沙漠中心区KT1孔(塔中南侧38km处,38°47′N,83°57′E,孔深653.8m)的野外岩芯编录、取样和综合研究。KT1孔基本上是砂层与泥质沉积的互层,大致划分为212层、106个互层、53个中