Study on the Formation Mechanism and Microphysical Characteristics of WarmSector Convective System with Multiple-Rain-Bands Organizational Mode

Based on ERA5 reanalysis data and multi-source observations, including polarimetric radar and automatic weather stations, this study analyzes the formation mechanism and microphysical characteristics of a warm-sector heavy rainfall event caused by a convective system with multiple-rain-bands organizational mode over the western coast of south China. In the early stage, under the influence of coastal convergence and topography, convection was triggered in the coastal mountainous areas and moved n...     

一种土地多要素综合评价模型的构建方法研究

针对传统土地评价不精准的问题,本文在传统的土地评价基础上,运用层次分析法,提出了一种基于多要素综合评价的模型构建方法,重点研究了主、客观评价因子以及相关权重确定原则,通过构建土地多要素综合评价模型,并以桂林市会仙镇为例,实现了基于多要素权重的土地评价。     

基于CDT骨架线的地图目标邻近冲突识别

制图综合过程中随着比例尺的缩小,不可避免地产生邻近冲突。为了在数字环境下自动地解决这类冲突,首先需要实现这些冲突的自动识别。文中提出一种基于CDT骨架线的地图目标邻近冲突识别方法。该方法首先基于CDT提取地图目标之间空白区域的骨架线;然后沿着每一条骨架线弧段所穿过的三角形路径搜索相邻地图目标之间的冲突区域(宽度小于阈值的三角形集合);最后,从冲突涉及的地图目标、发生冲突的空间位置以及冲突严重程度3个方面给出所识别冲突的定量化描述,从而为邻近冲突的解决提供依据。     

专题地图图面要素自动配置方法的研究

实现地图图面要素配置的自动化是地图制图自动化中的一个重要部分,能够帮助制图人员提高制图效率。文中在分析国内外有关研究成果的基础上,利用地图图面配置规律和视觉平衡理论,提出一种自动搜寻地图图面要素合适位置的方法。该方法从专题地图生产的实际需要出发,考虑了纸张大小和地图比例尺等因素,用矩形框表示图面要素的大小和位置,简化设计过程。最后,在CorelDRAW环境下,利用VBA技术实现文中所提出的方法。该软件提供了多种地图图面要素配置模板供地图设计人员选择,能进行地图图面要素位置的自动冲突探测,可以为地图设计人员提供一个标准化地图图面配置模板。     

Evaluation of CORDEX regional climate models in simulating temperature and precipitation over the Tibetan Plateau

区域气候模式对研究地形复杂的青藏高原地区气候具有高分辨率的优势。以前的相关研究主要基于单个区域模式,我们评估了CORDEX多区域气候模式对青藏高原气候的模拟能力。结果显示:(1)5个区域气候模式一致模拟出了相似的气温、降水空间模态,但产生了冷偏差和湿偏差。所有区域气候模式未能再现观测的气温、降水趋势空间模态,并且平均高估了气温趋势、低估了降水趋势。综合考虑模拟的气温、降水趋势,多模式集合的结果最优。就单个模式而言,Reg CM4所得趋势最为合理。(2)各区域气候模式结果之间的差异十分显著,表明青藏高原气候模拟具有很大的模式依赖性。这一结果建议当利用单个区域气候模式开展青藏高原气候变化研究时需要谨慎。(3)多区域模式集合预估显示,相对1986–2005年,到2016–2035年气温(降水)将增加1.38±0.09°C(0.8%±4.0%)(RCP4.5)和1.77±0.28°C(7.3%±2.5%)(RCP8.5)。这些结果从多模式角度提高了我们对运用区域气候模式研究青藏高原气候的认识。     

水资源承载能力评价方法研究及应用

为全面客观评价水资源承载状况,进而为经济社会发展合理布局提供理论支撑,本文在对水资源承载能力评价研究现状进行综述的基础上,考虑水量、水质、水生态3个要素,讨论分析了水资源承载能力内涵,从水资源承载负荷和承载能力2个方面出发,构建了水资源承载能力评价指标体系,采用实物量指标对水资源承载能力各因素分别评价,采用“短板法”全面考虑各要素评价结果,进而得到水资源承载能力综合评价结果。并以河北省为案例进行水资源承载能力评价,最后结合资源承载状况和超载成因,提出了河北省水资源调控措施建议,以验证评价方法的合理性与可行性。     

A study on the system of sustainable developmentof tourist marketing environment

1TheImplicationandFeaturesofTouristMarketingEnvironmentl.1TheimplicationoftouristmarketingenvironmentThetouristenterpriseshavestfongsocialcharacteristicsinthCprocessofeconondcachvihesofsocialistInareteconomy.ItSndehngbehaviorsareSynthedcallyaffectedbybothintemalandextemalcontrollableanduncontrollalllef8ctors.Thais,thetouristmarkehngisdevelopedundCrcertaintemPoIal-SPatialcondihonswhicharereferredtoasthetourist-markehngenvironment.Thetourist-nlarkehngenvironmntistheekishngandlivingspaceoft…     

Internet与我国旅游业

旅游业在Ｉｎｔｅｒｎｅｔ上开展商务活动,将引起传统运作模式的重大变革。我国地域辽阔,旅游资源丰富,利用这些独特的资源在Ｉｎｔｅｒｎｅｔ上建立优质的面向世界的旅游业网站,并走联合经营之路,将为我在的发展和我国经济的腾飞做出重大贡献。     

A New Method of Significance Testing for Correlation-Coefficient Fields and Its Application

Correlation-coefficient fields are widely used in short-term climate prediction research. The most frequently used significance test method for the correlation-coefficient field was proposed by Livezey, in which the number of significantcorrelation lattice(station) points on the correlation coherence map is used as the statistic. However, the method is based on two assumptions:(1) the spatial distribution of the lattice(station) points is uniform;and(2) there is no correlation between the physical quantities in the correlation-coefficient field. However, in reality, the above two assumptions are not valid.Therefore, we designed a more reasonable method for significance testing of the correlation-coefficient field. Specifically, a new statistic, the significant-correlation area, is introduced to eliminate the inhomogeneity of the grid(station)-point distribution, and an empirical Monte Carlo method is employed to eliminate the spatial correlation of the matrix.Subsequently, the new significance test was used for simultaneous correlation-coefficient fields between intensities of the atmospheric activity center in the Northern Hemisphere and temperature/precipitation in China. The results show that the new method is more reasonable than the Livezey method.     

基于小波分析的软门限滤波及其优越性评价

介绍了基于软门限的小波分析去除遥感图像噪声的处理方法,并利用一些指标,与传统的滤波处理方法进行对比分析后发现,基于小坡分析的图像滤波方法,在去除图像噪声的同时,可以很好地保持图像边缘纹理等细节信息。