面向任务的驾车导航POI分级体系构建的研究

POI分级体系的构建是POI自适应表达的关键。文中从影响驾车导航的因素出发,对驾车导航任务进行归纳,然后针对不同的导航任务,采用定性定量相结合的方式,通过问卷调查、焦点小组法以及数理统计的方法,构建对应不同导航任务的POI分级体系,满足驾车导航POI自适应表达的需要。     

浅谈等高线内插的几种方法与技巧

作者通过多年的实际生产经验,总结了1∶10 000地形图数据中等高线内插的几种途径及方法,简要地叙述了操作步骤及注意事项,这几种方法大大地节省了在立体中徒手采集等高线的时间,增加了图面修整等高线的美观性,且提高了生产效率。     

Multiplex PCR Sets of Novel Microsatellite Loci for Iwagaki Oyster Crassostrea nippona and Their Application in Parentage Assignment

Iwagaki oyster,Crassostrea nippona,widely distributes along the seashore of Eastern Asia,and has been considered to be a potential breeding species due to its delicious taste and high commercial value.In order to study its genetic background and population structure,we developed 46 novel polymorphic microsatellite markers using next-generation sequencing technique and characterized them in 30 individuals.The number of alleles ranged from 3 to 22,while the observed and expected heterozygosities varied from 0.133 to 1.000 and 0.455 to 0.949,respectively.Fifteen microsatellite markers were selected and grouped into five highly informative multiplex PCRs for C.nippona.We evaluated and validated these multiplex PCRs in a cultured population including 173 candidate parents and 486 offspring.In actual parentage analysis,80%of the offspring were correctly assigned to their parental pairs using three multiplex PCRs.Furthermore,the success rate of parentage assignment reached 96%when the other two multiplex PCRs were added.These 46 microsatellite loci with high variability and the five multiplex PCRs described here provide a powerful tool for pedigree reconstruction,resource conservation and selective breeding program of C.nippona.     

利用并行技术的海量数据瓦片快速构建

针对现有的将海量DLG、DOM、DEM、DRG(4D)数据转换成金字塔瓦片以供数据共享的解决方法的不足,文章提出了一种利用并行技术解决海量数据计算处理的思路,适用于需要海量地学数据处理计算的情形:将传统4D数据快速、有序、可控制地转换成瓦片数据,利用并行渲染技术来加速瓦片缓存的生成,利用对地理范围空间区块进行任务分割来完成并行切片的同步控制、任务的进度跟踪与断电宕机等异常中断恢复。将此方法投入于四川全省内大比例尺4D切片生产的结果表明,该方法并发性高,能快速、稳定地解决海量数据的切片任务。     

石河子地区强对流天气统计特征及防雹作业指标

通过148团数字化雷达1994～2001年5～8月8年的回波资料，对系统性对流、局地对流以及地面产生降雹情况进行统计，得出石河子地区对流雹暴的主要路径、时空分布特征。     

Sustainablc agriculture progress and tasks inrecent studies in China

IntroductionTheterm"SUStainaleagricultUre"becamewidelyusedinthebeginningofthenddl98Os.TherearethreeimpohanndlestoneperiodsintheprogressofsustainableaghcultaldevelopmenLFiruly,theraiseoftheconceptandlocaIdiscussions.In1984,thebookAgricoIturalSustainabihtyinaChangingfforldOrdereditedbyGordonK.Douglasscameout.ItcoIhassiXteenPapersonagriculturaldevelopmentanditssustainability.ForthefirSthmeabookintroducesanddefinestheconceptinthreeaSPectSoffoodsffociency,environmentsignificanceandconunta…     

基于Kinect的机器人辅助上肢被动康复训练控制方法

现有基于Kinect构建的康复训练系统,大多以患者自行开展主动康复训练为主,未能充分利用康复医师的临床经验且很少用于机器人辅助康复训练系统,具有一定的局限.针对此问题,提出一种基于Kinect的机器人辅助上肢被动康复训练方法.首先,开展基于Kinect的上肢骨骼点跟踪与逆运动学计算;其次,基于Linux/QT及Kinect设计三维虚拟康复训练环境;再次,在康复医师示教训练任务并通过Kinect获取示教任务参考轨迹基础上,根据训练过程中Kinect实时捕获的患肢运动位置反馈,设计基于模糊推理的机器人辅助被动康复训练控制器;最后,基于Kinect及Barrett公司4自由度WAM^TM康复机器人构建试验统平台,对方法有效性进行试验验证.实验结果表明,所提方法能有效利用医师的临床康复经验,并使机器人较平稳地牵引受试者上肢沿示教任务轨迹进行训练,较好地实现了"医师-机器人-患者"之间的人机协同康复训练.     

滇东南老君山中—深变质岩系铅同位素特征及时代归属

滇东南老君山地区是我国重要的锡多金属成矿区之一 ,区内中—深变质岩系的时代归属尚存在不同认识。通过对其中的花岗片麻岩类的铅同位素研究 ,获得全岩 长石铅 铅等时线年龄为 598±84Ma,( 2 0 7Pb/ 2 0 4 Pb) 0 =1 4 .52 3± 0 .2 3 5,γ =0 .97898,MSWD =1 4。这一年龄值代表了花岗片麻岩遭受混合岩化作用的年龄 ,相当于晚震旦世晚期。结合前人研究成果 ,本文认为该中—深变质岩系的时代归属于前寒武纪。     

Human expertise in the interpretation of remote sensing data: A cognitive task analysis of forest disturbance attribution

The visual analysis of remote sensing imagery is useful for the extraction of information not readily available through automated image analysis. Previous studies have shown that the replication of human reasoning about image content is difficult due to human creativity and mental flexibility. Development of automated image analysis programs continues; however, geovisual analytics suggests that it may be more beneficial to design symbiotic computer-human interpretation systems. It is imperative to understand the experiences, knowledge, and cognitive processes that image interpreters rely on. Cognitive Task Analysis (CTA) is a methodological framework developed from Cognitive Systems Engineering (CSE) where expert users are studied with the goals of explicating their needs, wants, and cognitive abilities for dealing with complex technological systems. Here we report the results of a CTA process carried out with users of a geovisual analytic tool to support forest disturbance detection and signification. These results suggest that different facets of the cognitive processes undertaken by users are not always explicit, and differences in the participant’s attentiveness to their mental processes vary greatly. Despite these differences and pathways to their final interpretations, participants were able to successfully come to similar judgments as for their peers.     

改进蚁群算法支持下的交通流量分配

灾后城市交通运输能力下降,原有的流量分配方案不再适用。为保障正常的经济社会活动,本文提出了一种基于改进蚁群算法的交通流量分配方法。首先评估路网通行能力影响因素并建立道路质量评价体系,利用路段质量改进蚁群算法中的启发式因子;然后为扩大蚁群搜索范围加入随机节点并改进信息素的更新机制;最后应用改进算法对城市交通总量进行分批分配并得到流量分配图。结果表明,改进算法综合考虑了出行距离和道路质量,较改进前更符合交通流量分配要求,具有较好的路径寻优性,可为灾后救援工作和灾后路网交通分配决策提供建议和支持。