中国入境游客旅游消费总体趋势与区域差异:1996~2005年

采用1996~2005年入境游客旅游消费的截面数据,通过构建评价表征指数,对中国入境游客消费变动以及区域差异进行实证分析。结果表明,在过去10年,入境旅游人均消费水平显著增加,但仍属于滞后性消费。旅游消费结构"九五"期间有较大变动,"十五"后趋于稳定合理。从入境旅游消费区域差异看,相对于区域旅游外汇收入,入境游客区域差异变动和消费结构呈现稳定状态;但是相对于旅游外汇收入水平,接待境外游客较多的地区恰恰也是人均消费水平相对偏低的地区,这些地区近10年来入境旅游外汇收入增长的主要助推因素仍主要来自接待入境游客规模的整体扩张,游客消费水平并没有质的提高。因此,塑造和完善旅游消费体系和保障体系,营造宽松的旅游消费环境,通过旅游产品供给结构优化调整来促进旅游消费质量的提档升级,将是实现入境旅游发展由数量扩张型向质量效益型战略转型的关键所在。     

BIOGEOCHEMICAL MECHANISM OF POSTDEPOSITIONAL MIGRATION OF Fe AND Mn IN LAKE AHA, CHINA

I.INTRODUCTIONLakeAhaisamedium--sizedartificialreservoirwithseasonallyanoxichypolirnnion,andawaterresourceofGuizhouProvince,China,builtin1958,workedin1960andexpandedin1982.Ithasadrainagebasinof190kmZwithaverageannualtemperatureof15.3tandprecipitationof1109rum.Openplantcover,containiflgshrubandgrass,surroundsthelake,andsialliticandstfeteyellowsoilisdevelopedonPe~ianlimestoneandcoallayer,meanwhile,OThisprojectwassupportedbytheNationalNaturalaudienceFOundationofChinaandtheaudienceFOund…     

哈尔滨工程高等专科学校测绘专业的师资队伍建设

阐述高等工程专科测绘专业教师的基本条件,介绍测绘工程系师资队伍的现状,师资队伍建设的方法及取得的成绩,指出了今后的努力方向。     

鄂尔多斯盆地奥陶系丘形反射的解释及其与礁的关系

鄂尔多斯盆地Ｔ９－Ｔ１０地震反射波组之间的奥陶系碳酸盐岩中存在着许多丘形反射,其中一部分属于以藻类生物为主的藻丘类型,一部分为东部盐凹中的盐丘,一部分为奥陶系顶古风化壳残丘,其它丘形反射为绕射波,回转波,或者为地表静校不当引起的假象,奥陶系的礁丘一般规模很小,岩性以粘结为主,其孔隙发育好坏同风化残丘一样,主要取决于次生溶蚀作用,但礁丘生长过程中由于受海面波动影响,曾发生过多次暴露,形成多期溶孔,礁     

光波多普勒效应公式的3种推导

给出光波多普勒效应的３种推导,并简述其重要意义。     

遥感技术用于太行山北段金矿研究

本文介绍了遥感技术在太行山地区岩性勾绘、构造解释、蚀变带识别、矿化信息提取及找矿靶区圈定等方面的应用。探讨出该区的成矿规律和找矿方向,总结出适应于这类地区的图像处理技术和遥感、物化探资料综合分析方法。     

油气储层的地震响应及地震响应异常分析研究

研究油气储层的地震响应及其异常其目的在于利用某一油气储层的地震响应特征及其异常分布规律进行油气储层的横向预测和油气分布预测。地震响应特征参数包括３５种特征参数。本文主要研究了千佛崖组的地震响应及其异常分布特征,这为寻找千佛崖组中的高储高产部位提供了方法和依据。     

正确认识“爱因斯坦”火车问题

本文对一些书本在解释“爱因斯坦火车”例中存在的矛盾作了概述、并以“空间收缩效应”这一狭义相对论的实验基础为依据,提出正确解释。同时介绍由类时间隔事件的性质间接解释“爱氏火车”一例的方法。     

Safety analysis of water resources and eco-environment in Shiyang River Basin

The research on the present situation of soil and water development and utilization in Shiyang River Basin shows that water resources and eco-environment situation in this area are near the edge of collapse. Since the water crises occurred in the 1970s, problems caused by continuous decrease of water resources have been becoming serious year by year and eco-environment crisis occurred as a consequence. Up to now, 10 380ha of irrigated lands have been abandoned due to sand coverage and water shortage in the basin. Ground water was over exploded in Wuwei and Minqin because of water shortage. Ground water table in many places dropped under 5m (which is the ecology water table level), thus about 3000ha of Elaeagnus angustifolia forest come to dead and another 5800ha become feeble, and wind-drift sand near the oasis become alive. According to the current situation, if water utilization scope was not enlarged, a water transfer volume of 600×10⁶m³/a from other areas will be suitable to keep water resources and eco-environment safety in the basin, and also 70×10⁶m³/a will be left as spare water. Under this condition the water resources and eco-environment of the basin can reach the critical safety line of 2.032×10⁹m³/a; or if 180×10⁶m³ of water can be transferred from other areas, the water resources can reach the safety warning line of 1.732×10⁹m³/a. Foundation item: Under the auspices of the National Natural Science Foundation of China (No. 40235053) and Lanzhou Jiaotong University "Qinglan" Foundation Biography: ZHANG Ji-shi (1963-), male, a native of Tongwei of Gansu Province, senior engineer, specialized in water resources and climate change in Northwest China. E-mail: zjs1963@yahoo.com.cn; hangjs@mail.lzjtu.cn     

Variability of the Continental Water Boundary near the Prydz Bay

Based on the Data Obtained during the 15th Antarctic Expedition of Chian between November 1998 and February 1999,the paper discusses the water masses distributed on both sides of the Continental Water Boundary ( CWB) as well as the spacial variability of the physical characteristics of the central location, the frontal width, the frontal strength, the vertical depth, and the vertical thickness for CWB. The above results are compared with the results from the data obtained during the 9th Antarctic Expedition of China between December 1992 and February 1993, and the temporal variability of those characteristics is discussed. In addition, the inhomogeneity of the kinematic characteristics and the patterns of the dynamic heights for those water masses located on both sides of CWB are illustrated. As it is pointed out in the paper, the trough in the dynamic height field is identified with the frontal location of CWB and the oceanic current shear. Furthermore, the dynamic reason for the upwelling of the circumpolar deep water can be understood by the explanation described in the paper.