Jenniferann.com,regional development,and realising the aspirations of mana whenua in Pōkeno

During the 1990s, the township of Pōkeno was held up as an example of a declining rural Aotearoa/New Zealand. By‐passed from the national state highway, it lost its status as a service hub and drastic measures were introduced to revitalise the town, including renaming the town “ Jenniferann.com .” Pōkeno has since undergone an unlikely transformation, with foreign investment and its location within an extended Auckland commuter zone meaning that the township has grown exponentially. This article describes the transformation of Pōkeno and uncovers what has been missing from discussions about Pōkeno's reinvention, namely, the place of mana whenua.     

基于最小信息量准则的小波变换确定变形监测精度

提出了应用最小信息量准则,提取了原始数据中的噪声信息并完整地保留变形信号,准确地估算了实际监测精度。     

几种常见影像融合方法的比较

简述了多源遥感影像融合过程,并利用IKONOS-2的全色影像和多光谱影像,对常用的几种影像融合方法进行了试验与比较,同时对实验结果进行分析和讨论,结果表明小波变换融合算法总体优于其他几种融合方法。     

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An examination of the use of the logratio transformation for the testing of endmember hypotheses

Given a compositional dataset in the absence of any prior information on any mixing process which may have formed it, a complete analysis of mixtures determines three distinct types of estimates in order. These are: (i) the estimate of the number of endmembers or fixed source compositions, of which all the sample compositions of the dataset must be approximate mixtures; (ii) the estimated compositions for each of these chosen number of endmembers; and (iii) the estimated contributions of each of these endmember estimates to each sample. Traditionally, the estimate for the number of endmembers has been assessed either by mapping or by inspection of the coefficients of determination between the observed and estimated variables. Mapping entails the plotting on a map of the region from which the samples were taken, either the contours of the contributions of each endmember to each sample, or some other portrayal of the distribution of endmember abundances. Because it requires the complete analysis, assessment by this method is too elaborate except for final confirmation and display. Alternatively, choosing a number of endmembers, which result in suitability high coefficients of determination for all or most variables, may account for elements which are not part of the conjectured mixing process or, worse, may result in the identification of endmembers which may never in fact have existed. Such an error is similar to overspecifying a multiple regression model. So, the obvious starting point from which to assess the validity, or otherwise choice of endmember numbers, is to examine the matrix of residuals. The differences between the logratio-transformed observed and estimated data form an array of residual logratios. A linear combination of these may be formed for each sample, which, under a random perturbation assumption, should follow a univariate normal distribution. Whether or not this scalar is normal can be readily tested. It can also be examined graphically for such desirable qualities as symmetry when the test for normality may be too severe. This procedure is employed to assess the decompositions of the U.S.G.S. Mid-Pacific data and the Nazca Plate Surface sediments.This paper was presented at the 18th Geochautauqua, Newark, Delaware, 13–14 October 1989.     

强夯加固近期粗粒填土塌陷特征的研究

强夯加固近期粗粒填土时,夯点部位的土体明显产生了漏斗式塌陷,并且有数条环状和根状裂隙。针对这种特殊的地质特征,说明了由大孔隙到小孔隙,填土要经过瞬间的3个变化过程,而且在有效加固深度内土体呈“逆向转换”规律,同时分析了为什么夯点土体在成分均一的条件下,不同部位承载力悬殊这一关键性问题,对夯点间距的设计提供了理论依据。     

城镇地籍基础地理数据建库方法探讨

通过对第二次全国土地调查城镇地籍调查数据建库标准的分析,提出一套基于大比例尺城镇地形图开展基础地理数据建库的方法,探讨利用数据建库成果地形图图式的符号化回放,既满足城镇地形图的出图效果又满足基础地理数据GIS方法管理的需求.     

轻量砂变形及强度特性三轴试验研究

通过三轴试验系统研究了新型土工材料--轻量砂的变形及强度特性。结果表明,不同的配比、龄期使轻量砂具有不同的原生结构强度,围压使不同原生结构强度的土样处于剪胀或剪缩状态,导致发生应变硬化、应变软化以及相应状态下孔压的3种对应形态变化。变形模量随EPS（发泡聚苯乙烯）球粒掺入比的增大而线性减小,随水泥掺入比、龄期增大而线性增大,相同配比的土样变形模量与围压关系不大;三轴抗压强度随EPS球粒掺入比增大而呈负指数关系减小,随水泥掺入比、龄期、围压增大而线性增大,存在水泥掺入比阀值;土骨架转换效应对于土样强度的影响很大,造成了土体单轴、三轴抗压强度分带,高水泥掺入比能够大大弱化EPS颗粒的土骨架效应。结合前人成果,系统地研究了轻量砂密度、无侧限抗压强度的影响因素,引入材料学中比强的概念,提出了单价比强图结合配方公式的方法,对轻量土砂进行配方优化。分析了轻量土砂应力-应变关系转型问题,提出采用无侧限抗压强度来表征不同配比、龄期轻量土砂的原生结构强度。通过试验与数理统计,建立临界围压与原生结构强度的关系,为数值模拟计算与建立本构模型奠定了基础。     

土地开发整理项目规划设计变更的原因及对策

通过对临沂市部分县区土地开发整理项目规划设计变更实际情况的数据分析,对土地开发整理项目规划设计变更的类型进行了分类介绍,分析土地开发整理项目规划设计变更的主要原因是规划设计与项目区的实际情况脱节,并在此基础上提出了严格控制土地开发整理规划设计变更的对策。     

再悬浮条件下沉积物内源磷迁移-转化机制研究进展

对沉积物再悬浮的驱动力及其耦合效应、再悬浮-内源磷迁移转化机制及主要影响因素进行了阐述,探讨了该领域未来可能的研究方向。相关研究发现,沉积物再悬浮的各种驱动力既可以单独作用也可相互耦合,其耦合效应具有显著的时空变异性;再悬浮使还原态沉积物暴露于有氧环境,沉积物中铁、锰的氧化以及沉积物颗粒的吸附促进了内源水溶态无机磷(SRP)的去除,而进入水体的内源有机磷则通过生物矿化和光化学分解转化为SRP;沉积物物化特征、水动力、水生生物以及水体理化性质等因素控制着再悬浮过程中内源磷的迁移和转化。指出再悬浮条件下沉积物内源磷迁移转化的多过程耦合效应、沉积物中磷形态的转化及其生物有效性、内源有机磷矿化与光化学分解机制及其调控因素将是本领域需要进一步研究的重点。