基于区位商视角下的云南省高原特色农业发展研究

发展特色农业已成为新一轮农业经济振兴的着力点,该研究在运用区位商法分析云南各地市农产品规模优势的基础上,利用SWOT分析法对云南省高原特色农业发展的内部优势、劣势以及发展中存在的机遇、威胁进行综合分析,结合云南省农业的发展现状和高原农业的总体要求,提出了建设旅游农业,加强质量安全管理,加大资金投入和政策扶持力度.加强农业基础设施建设,推进云南优势特色农业向南亚、东南亚开放等对策建议.     

基于城市流强度的山东半岛城市群城市经济联系分析

[目的]了解山东半岛城市群城市经济联系.[方法]以山东半岛城市群为研究区域,利用城市流强度的方法,对济南、青岛等8个地级市之间的经济联系进行计算.[结果]在研究区域各个行业中制造业的外向性最为明显,而服务业有待于进一步发展;各城市城市流强度差距较大,根据计算结果将8个地级市分为高城市流强度、中城市流强度和低城市流强度三个等级;青岛城市流强度明显高于其他城市,居于核心地位,与周围城市经济联系较为紧密,济南与其他城市经济联系较为松散.[结论]各城市城市流强度在波动中上升,经济联系日益紧密.     

用FOX法对长期定位施肥土壤磷素状况的研究

用FOX法研究长期定位施肥土壤磷素状况,通过对23年长期定位试验土壤的测定计算,结果表明M1、M1N1、M2、M2N2处理不施磷肥就达到土壤溶液0.2μg/g水平,能满足作物正常生长的需要,而长期不施有机肥和磷肥的处理CK、N1、N2则每平方米施80.14g、104.14g、115.35g含P2O514%的磷肥(过磷酸钙)才能满足土壤中正常的磷素水平。     

水稻品种 IR28对我国白叶枯病菌系抗病基因定位研究

本文研究了水稻品种 IR28对我国白叶枯病(Xanthomonas campestris Pv.oryzae)菌系江陵691和 OS-75的抗性基因与23个标记性状的遗传关系,结果表明:大多数标记性状由隐性或显性单基因支配,如 v-1,g,gh-1,la,tri,bc-1,Bh,fgl,pgl,Pa,cl 和 Bf。而白条斑叶、叶绿素缺少叶和下垂叶是由双隐性累加基因控制的,支配紫果皮、红果皮和紫     

Human attitudes towards wolves, a matter of distance

The objective of this study was to test the hypothesis that distance is an important factor affecting attitudes towards wolves, i.e. people living far from wolf territories have more positive attitudes towards wolf conservation than those living within or close to wolf territories. We used multiple regression (an ordered probit model) with both socio-economic variables and information about the respondents’ distance to the nearest wolf territory. We found that favourable attitudes towards wolf conservation were positively associated with distance to the nearest wolf territory. The variable distance to the nearest wolf territory affected attitudes just as much as the variables of membership of nature conservation organisations, being a hunter, owning livestock, or owning a hunting dog. This was true even on the micro-level, i.e. people living in wolf territories had a more negative attitude towards conservation of wolves than people living just outside. Furthermore, we suggest that attitudes towards wolves are more likely a result of indirect experience than direct experience of wolf presence. Our findings are important when interpreting studies of human attitudes towards conservation of controversial species in general and large carnivores in particular, and should be used when designing future surveys of human attitudes towards conservation and management initiatives.     

Development of a real-time computer vision system for tracking loose-housed pigs

Changes in regulations for livestock animals will in the near future call for loose-house pig breeding systems. These new systems will increase the workload for the farmers, as location and identification of animals will require more time than before. This paper presents a real-time computer vision system for tracking of pigs in loose-housed stables. The system will ease the workload for farmers in identification and locating individual animals. The system consists of a camera and a PC. The PC runs a tracking-algorithm, estimating the positions and identities of the pigs. The tracking algorithm operates in 2 steps. The first step builds up support maps, pointing to preliminary pig segments in each video frame. In the second step the support map segments are used to build up a 5D-Gaussian model of the individual pigs (i.e. position and shape). The system has software correction for fisheye distortion coming from the camera lens. The fisheye lens allows the camera to monitor a much larger area in the stable. The algorithms are developed in MatLab, implemented in C and runs in real-time. Experiments in the lab and in the stable demonstrate the robustness of the system. The system can track at least 3 pigs over a longer time span (more than 8 min) without loosing track and identity of the individual pigs in a realistic experiment.     

基于服务最大化的果蔬品配送中心选址问题

针对果蔬品具有易腐、消耗快等特点,建立基于服务最大化的果蔬品区域配送中心选址的数学模型,并运用遗传算法求解该模型。最后通过实例研究验证该模型的有效性。     

基于区位熵理论的城市旅游化测度方法及其应用

基于区位熵理论,利用旅游收入和GDP等常见指标构建出新型的城市旅游化测度方法,并以广西为例进行了实证研究。研究发现:根据旅游化水平差异,广西城市可划分为典型、一般、准、非旅游城市4类,根据系统层区位熵协同关系划分为人次引领型、依存度引领型、均衡发展型。从2010—2015年时空序列变化看,旅游收入、依存度、综合区位熵变化明显,但旅游人次区位熵变化不大。     

植物核苷二磷酸激酶(NDPKs)研究进展

为了给植物核苷二磷酸激酶NDPKs的进一步研究提供参考,总结了植物核苷二磷酸激酶(NDPKs)的分类、亚细胞定位、功能及其在植物基因工程中的应用。重点分析了NDPKs功能方面研究的最新进展,NDPKs不仅能够作为一种看家酶,维持细胞NDP和NTP代谢平衡,而且还是一组多功能蛋白,参与植物细胞的生长与分化、光敏色素A、紫外线-B、热击响应及氧化胁迫响应中的信号传导等多种生命活动过程,甚至具有核酸酶活性。最后指出植物NDPKs的研究方向,并展望了其在植物抗逆基因工程方面良好的应用前景。     

桂西南资源富集产业集群就业效应分析——以崇左市为例

以桂西南地区的崇左市为例,根据2003～2008年崇左市统计年鉴、广西统计年鉴和崇左市相关机构中得来的数据,从产业集群的4大就业效应——就业链空间扩展效应、就业结构优化效应、就业吸聚乘数效应和劳动力素质提升效应以及就业集中度、就业区位商对桂西南资源富集产业集群的就业效应进行了分析。结果表明,崇左市制糖工业的就业吸聚能力在稳中仍然有所提高,表现出极强的就业效应;崇左市糖业集群不仅在广西区内的具有很强的竞争力优势,而且所占的就业份额也较大,表现出很强的就业吸纳能力。由此提出了桂西南资源富集产业集群的就业水平提高的对策：延长产业链,拓展就业空间;强化各类正规和非正规教育培训,提高劳动力就业能力;调整产业结构,优化就业结构;加强面向东盟的产业经济带建设,充分发挥近海沿边的区位优势。