旅游信息系统建设模式探讨——以佛山市为例

作为当前旅游信息系统开发的两种主要基础平台，地理信息系统和多媒体制作系统都存在一定的缺陷。多媒体制作系统缺乏旅游地图的有效管理，空间查询，分析和统计功能，旅游地理信息系统则缺乏旅游信息的多媒体表达能力。从实用性和普及性出发，集合二者优点开发模式具有更大的推广应用价值。因此，论文提出在同一界面下基于GIS和多媒体集成的旅游信息系统开发模式；（1）在GIS中增加多媒体信息表达能力，以关系数据库为核心，把多媒体文件名信息存储在地理信息系统属性库，依靠多媒休段实现多媒体数据与地理信息系统图形和属性的关联，实现查询的基本概念；（2）在多媒体系统中开发部分GIS空间查询功能。以此思路，佛山科技学院GIS技术实验室利用VB进行GIS和多媒体二次开发，成功地完成了佛山旅游信息系统的设计和开发。     

长春市旅游产品开发研究

搞好长春市旅游产品的开发与设计对其旅游业的发展极为重要，长春市旅游资源类型多样，内容丰富，主要有生态旅游资源，电影文化旅游资源，产业旅游资源，殖民遗迹旅游资源，辽金文化旅游资源等五大资源优势。文章在分析这些资源优势的基础上，结合长春市国内外旅游客源市场的背景与现状，提出了旅游产品开发的具体思路，即在今后的开发中应突出地方特色。增强参与性，以七大旅游产品系列为依托，重点开发冰雪旅游，生态旅游，文化旅游和产业旅游。     

β-环糊精包合态三氟氯氰杀虫剂的制备

为了进一步提高三氟氯氰菊酯农药的防治效果。寻找适宜的农药新剂型，我们用液相法制备了三氟氯氰菊酯－β－环糊精包合物，并以水为基质进行了稳定性观察，同时又以差热分析法和气相色谱法确认了包合物的形成，以旋光度法证明两者间的包合比。结果表明，三氟氯氰菊酯与β-环糊精可形成1：1型包合物，该包合物稳定性高，具有一定的水溶性，而且在水中稳定，所以有望通过环糊 包合作用将三氟氯氰菊酯帛成水剂；当以气相法测试包合态三氟氯氰菊酯含量时，必须将其解络，使之成为游离状态，然后按常规方法进行含量测定。     

阿拉尔灌区棉田蒸散量计算模型

根据2000年阿克苏水平衡站有底测坑试验资料，分析了土壤水分有效性函数与土壤相对有效含水率，作物生物学特性函数，与群体叶面积指数的关系，结果表明：（1）土壤水分有效性函数与土壤相对有效含水率呈直线函数关系；（2）作物生物学特性函数与群体叶面积指数呈指数函数关系。选用20cm蒸发器水面蒸发量、作物生物学特性函数和土壤水分有效性函数，应用数理统计方法建立了阿拉尔灌区棉田蒸散量计算模型。该模式仅需常规气象与土壤湿度资料，计算简便，精度较高，便于在缺乏实测资料的地区使用。     

灌淤土壤可溶性盐分空间变异性与棉花生长关系研究

运用地统计学方法，在灌淤土壤上进行了棉田土壤可溶性盐分的空间变异规律与棉花生长关系系统研究。传统统计学分析表明土壤盐分测试数据基本符合正态分布；在一定取样间距下，土壤可溶性盐分的田间合理取样数目为27。半方差分析显示：土壤可溶性盐分具中等的水平变异性，但随着聚样深度的增加未表现出明显的垂直变异特性；随着棉花的生长发育，土壤可溶性盐分呈现出逐渐减弱的时间变异规律，采用直线或曲线拟合方程估计了可溶性盐分的半方差图及其参数，并绘制了其相应的等值线图。土壤可溶性盐分与棉花产量之间的相关分析表明：可溶性盐分含量与棉花产量之间呈显著负相关关系，且花铃期的相关性较播前显著。研究结果为提高田间试验有效性以及盐渍化土壤改良提供了科学依据与基础资料。     

由三元系相图计算活度的方法Ⅱ.有二元同分熔点化合物的体系

利用熔化自由能 ,由具有同分熔点二元化合物的三元系相图计算活度。计算的范围遍及三元相图的液相面、液相线、共熔线和三元低共熔点     

东南极格罗夫山变基性岩初步研究

东南极格罗夫山存在一套经历了峰期麻粒岩相变质作用的镁铁质麻粒岩和斜长角闪岩。对含石榴石的镁铁质麻粒岩的详细研究则显示了近等温降压 (ITD)的顺时针PT演化轨迹 ,与拉斯曼丘陵有相似的演化历史。岩石的主量元素组成和玄武岩一致 ,并且具有拉斑玄武岩演化趋势。进一步的地球化学研究表明 ,这套玄武岩为洋岛型玄武岩 (OIB)和洋中脊型玄武岩(MORB)的组合。OIB型具有大体类似的地球化学性质 ,它们均富集Ti(TiO2 =2 .68% )、REE( =2 0 2 μg/g)、LREE[(La/Yb) N=4.8]、Ti/Y( =343)、Zr/Y( =3.1 ) ,具洋岛玄武岩的特征 ,推测岩浆来源于富集地幔源区 (EM)。而MORB型以低Ti (TiO2 =1 .1 %— 1 .31 % ) ,明显低于OIB的P的含量 (P2 O5=0 .1 %— 0 .2 % ) ,低REE ( 4 7— 93μg/g)、LREE/HREE( 2 .2 7— 2 .5 4 )、(La/Yb) N( =1 .30— 1 .62 )为特征 ,具洋中脊玄武岩的特征。MORB和OIB组合的出现说明在泛非期该区可能存在过洋盆。     

Groundwater regime and calculation of yield response in North China Plain: a case study of Luancheng County in Hebei Province

The groundwater table has been declining at a rate of 0.65 m/yr in Luancheng County since large scale groundwater extraction carried out in the 1960s. The drop of precipitation, substantial increase in agricultural output, variations of crop planting structure and construction of water conservancy projects in the headwater area all tie up with the decline of the groundwater table. On the basis of analyzing the hydrogeological conditions and the water resources utilization of Luancheng County, a three-dimensional groundwater flow model was developed to simulate the county’s groundwater flow through finite-difference method using Visual Modflow software. We divide the research field into four parts after analyzing the hydrogeological condition. Based on parameter calibration and adjustment using measured data, the hydraulic conductivity and specific yield were simulated. Using the calibrated model, we analyze the agricultural water saving potentiality and its influence on the groundwater. The results are as follows: (1) if we decrease the amount of water extracted by 0.14xl0⁸ m³, the average groundwater table of the five observation wells in December will rise by 0.33 m; (2) if we decrease the water by 0.29x 10⁸m³, the average groundwater table of the five observation wells in December will rise by 0.64 m; and (3) if we increase the water by 0.29 x 10⁸m³, the average groundwater table of the five observation wells in December will decline by 0.45 m. So we can draw a conclusion that controlling the agricultural water use is an important way to prevent the decline of groundwater table.     

Research progress of socio-economic water cycle in China

China has made great progress in the study of socio-economic water cycle. She has completed national water resources appraisement and medium to long-term water supply planning. She has been engaging in study on water-deficient regions in North China and Northwest China for about half a century. For solving water shortage problem in northern China, she has put forward the famous South-to-North Water Transferring Projects, which has been set as one of the four biggest national projects in the Tenth Five-Year-Plan period although there are still debates. For promoting water use efficiency, China has been reforming her water management system, including water right system and water price system. There has already been a case of water right purchase. China has also done a lot of research on the interaction between human activity, water and ecosystem. For meeting the need of sustainability and coordinating water resources development and environmental protection, the study of ecological water requirement became very hot in recent years. There are three focuses of socio-economic water cycle study now in China: water transfer projects from the south to the north, water resources management and ecological water requirement.