配送中心选址研究

配送中心选址在整个物流系统中占有十分重要的地位,物流节点的数量、分布将直接影响到该物流系统的物流服务成本以及其服务范围。从对物流配送中心建立到配送各过程进行研究,并利用熵值法对总费用的各个分费用进行加权——根据各项指标的实际数据提供的信息量的大小来确定权重,客观的反映了各项支出费用的重要程度,从而建立了关于选址的线性费用模型,使得决策结果更合理,最后用枚举法进行了实例求解。     

新型城镇化中休闲农业的定位与作用

从休闲农业的内涵与特性入手,认为它是集生产、生活、生态“三生”一体功能的新型产业,具有可持续性、科技性、文化性和产业融合性的特征。介绍了发展休闲农业与新型城镇化的关系,在实现农民市民化、就地城镇化、文化传承、生态保护和城乡统筹发展5个方面存在的意义。然后从资金保障、发展动力、劳动力资源和物质保障4个方面阐述休闲农业是如何引导新型城镇化的形成,具体介绍了休闲农业引导的新型城镇化的发展模式——旅游小城镇、旅游新农村社区和旅游卫星城镇。最后阐明休闲农业在引导过程中要注意城镇化的不同特色、合理规划和利益共享3个要点。     

Influence of growing area and harvest date on the organic acid composition of olive fruits from Gemlik variety

Organic acids (oxalic, citric, galacturonic, tartaric, malic, lactic and succinic) contents of Gemlik variety olive fruits from five different cultivation areas of South Anatolia (Turkey), harvested in six collection dates (September, October and November of crop years 2006 and 2007), were determined by HPLC/DAD. Citric acid was the major compound (∼45%), followed by succinic (19%) and galacturonic acids (∼16%). The olive fruits of Antalya location showed the lowest and Karaman, Alanya and Hatay locations had the highest levels of total organic acids, especially on the early and late harvest. Significant interactions between “location”, “harvest date” and “crop year” were found, regarding the concentrations of citric, lactic, oxalic, tartaric and malic acid (3-way and 2-way interactions), which means that the effect of one factor (e.g. “location”) on an acid's concentration is not constant across the levels of the other factor. For succinic and galacturonic acids's concentrations, all interactions between the considered factors were statistically significant, except the 2-way interaction between “harvest date” and “crop year” which was no significant, meaning that the effect of factor “harvest date” on the succinic and/or on the galacturonic acid's concentrations does not vary significantly from one level of factor “crop year” to other. Significant mean differences were found in the concentrations of individual organic acids according to harvest time, which indicated generally a decline as harvest date moved on or no significant changes in some cases. Our results showed that rainfall and altitude of the location seemed to have more marked effects than temperature, on the levels of some organic acids such as malic, oxalic and succinic acids. The grouping of locations formed in Principal Component Analysis were quite different according to crop years, as for the first crop year (2006) “oxalic, citric, tartaric and succinic” and “lactic, malic, galacturonic” acids were the two groups of variables mainly responsible for discrimination, while for the following crop year (2007) “galacturonic, tartaric, oxalic, lactic”; “succinic, citric” and “malic” acids were the three groups responsible for the formation of clusters.     

Tolerant Mechanism and Chromosome Location of Gene Controlling Sprouting Tolerance in Aegilops Tauschii Cosson

An artificial amphiploid RSP (2n = 42, AABBDD) between tetraploid landrace Ailanmai(Triticum turgidum L., 2n= 28, AABB) and Aegilops tauschii (DD, 2n = 14) expressed high tolerance to preharvest sprouting which derived from Ae. tauschii. Tolerance to preharvest sprouting of RSP was examined by four ways in six varying periods after anthesis. The germination percentages of preharvest intact spikes were only 6.06 % in its high peak period of germination. Its tolerance was mainly decided by the seed a recessive trait which was controlled by one gene, located on chromosome 2D.     

基于AHP的河南省粮食应急物流中心选址研究

分析了河南省粮食应急物流的现状和存在的问题,探讨了配送中心选址的指标体系,运用层次分析法建立了河南省粮食应急配送中心选址模型,并用案例验证了其可行性。     

保定市土地利用结构定量分析

根据土地利用详查变更资料中二级分类的用地面积,采用一定的分析方法,对保定市土地利用结构进行了定量研究。研究结果表明:该研究能够很好地揭示区域土地利用结构的地域分异,其结果能在一定程度上反映研究区自然条件和社会经济基础;研究区土地利用结构呈以下规律:耕地是居于首位的土地利用类型,土地利用结构具有明显的地域化,且整体功能偏差,但具有区位意义的农业土地资源较为齐全;研究区土地利用结构区域差异主要受地理位置、地貌状况和社会经济发展条件水平等因素的影响。     

鄱阳湖棉区土壤肥力长期定位监测研究

采取空白地与施肥地建立两个长期定位监测点,根据调查农户耕作记录和土壤养分检测结果,分析土壤养分动态变化,对鄱阳湖棉区的水稻土和潮土等类型土壤进行肥力变化的研究。通过对两种土壤长期定位监测,结果表明长期大量施用化肥,会造成棉区耕地土壤养分供给逐渐失衡,而测土配方施肥项目的推进,可有效地缓解和改善这种不平衡状况。     

基于空间统计的重庆市渝中区地价房价分布规律

针对房地产研究领域中房价与地价关系,从房价和地价空间分布特征、房价与地价空间关系以及房价与地价空间趋势分析3个方面着手,在GIS空间统计支持下从区位角度出发,利用趋势分析、变异函数、Voronoi图和剖面图的方法研究房价、地价空间分布特征,对重庆市渝中区房价与地价分异特征进行实证研究。     

基于SSM和区位商分析法的定西市产业结构演进与经济增长研究

根据2004~2008年统计数据,运用shift-share偏离份额分析法和区位商分析法,对定西市各县（区）2004~2008年的经济发展状况进行和比较,分析了产业结构与竞争力方面的优势、劣势以及现有产业结构对经济增长的影响,得出定西市各县（区）三次产业发展方向和发展重点。提出了加快定西市各县（区）经济发展的对策建议：加大特色农业投入,促进第一产业发展;加快大中型工业企业建设,促进第二产业发展;加强旅游区环境综合整治,积极发展第三产业。     

对在华境外非政府组织的分类财务监管研究

采用1993-2014年中国31个省市的外商直接投资数据,利用了空间马尔可夫链方法和地理信息技术,研究了中国各省市外商直接投资的时空演化特征.按照FDI投资比重大小把各省市FDI演化特征划分为低、中低、中高和高4种类型,构建马尔可夫状态转移概率矩阵,利用空间Markov方法模拟了中国各省市FDI投资的时空演化过程.结果发现中国各省市FDI分布极不均衡,在1993-2002年期间主要分布在中国东部沿海地区,到2014年具有逐步向中西部转移的趋势.比较空间马尔可夫链的初始分布和极限分布发现,当处于低和中低状态时,极限概率小于初始概率,当处于中高和高状态时,极限概率大于初始概率;由此可以说明中国各省市FDI投资水平的提高正在稳步推进,而且FDI空间区位演化过程具有发散性.