利用“3S”技术建立盘锦湿地信息系统的研究

在充分吸收以往盘锦湿地研究成果的基础上,利用“3S”技术,采用直接判读与综合分析相结合的解译方法,建立盘锦湿地信息系统,实现了湿地识别、类型划分、面积计算和管理信息存储等功能,较系统地确定了采用卫星遥感、地理信息系统和地面调查相结合的技术手段开展湿地资源宏观调查的研究方法。     

坑状浅沟侵蚀研究

坑状浅沟作为浅沟与切沟的中间过程，深入理解它对于进一步认识切沟侵蚀规律具有十分重要的意义，但是还没有见到相关的研究报道。以内蒙古高原的一个小流域为例。利用高精度的全球定位系统（GPS）测量坑状浅沟侵蚀的形态参数，探讨了坑状浅沟的相关特征，分析了坑状浅沟的坡度（S）和上有集水区面积（A）的关系（S—A）、侵蚀体积（V）和长度（L）的关系（V-L），以期能推动坑状浅沟侵蚀的研究。     

GPS在林业公路普查中的应用

分析论述了普查的范围和内容,对普查的技术指标、方法及步骤做了详细介绍。     

12通道GPS定位仪在草场承包中的应用

GPS(全球卫星定位仪 )在草场承包中能发挥很大作用 ,可以减轻劳动强度 ,减化作业过程 ,提高工作效率 ,具有精度高、速度快、操作简便等优点     

使用Java实现GPS接收机的串口通信

首先简单介绍了GPS接收机串口通信的基本概念．然后详细介绍利用Java Communication API扩展类库(Javax.comm)来实现GPS串口通信的例子，在实例中还结合Map Objects Java Edition开发工具实现了对GPS接收机位置的实时跟踪和显示。     

GPS选择可用性及其对策研究

作者在对ＧＰＳ选拔可用性（ＳＡ）及它对ＧＰＳＣ／Ａ码定位精度的影响研究的基础上，对各种可能采用的对策从理论和实用角度进行了分析。作者认为，在研究对ＳＡ的对策时，我们不宜从如何破译δ和ε信号的变化规律入手，而应着眼于如何设法提高因受ＳＡ影响而降低的定位精度，以达异曲同工之效。     

GPS后处理差分方法在森林资源调查系统中的应用

概述了GPS差分的基本原理,对森林资源调查中的一般工作流程进行了概括,并对GPS后处理过程中的一些细节进行了探讨。最后以实际勘测结果为例说明了载波相位差分法的应用,可提高森林资源调查的精度。     

手持低精度及高精度GPS接收机在林业调查中的应用研究

手持GPS接收机广泛应用在森林调查中,特别是目前国产高端手持GPS在林业调查中的运用,将促进林业调查规划等工作向着精确、高效的方向发展,因而基层林业技术人员必须系统掌握正确的操作方法。综述了手持GPS在林业调查的应用,主要就低端及高端手持GPS接收机应用过程中出现的问题进行了简要论述,阐述了提高其精度的操作策略和技巧。     

Competition Horses Housed in Single Stalls (I): Behavior and Activity Patterns during Free Exercise According to Its Configuration

Although welfare of animals has become more important, housing horses in systems that limit natural behavior patterns is still widespread. Single stalls are the predominant housing system in Germany, especially for competition horses. Free exercise on fields or paddocks helps to improve welfare for the animals, but allowing it is not taken for granted by many horse keepers. In the present study, three common management practices were investigated with regard to their effect on the behavior of six competition horses housed in single stalls: 2-hour turnout after training in groups of two horses (group turnout [GT]), solitary turnout (ST) after training for 2 hours, and no turnout (NT) in addition to training. The aim of the study was to determine the differences in the horses’ behavior during turnout, training, and in the stable caused by the treatments. This article focuses on the behavior and activity patterns during turnout. The horses’ behavior was observed directly by the scan sampling method (5-minute interval), and the distance covered during turnout was measured by global positioning system devices. During turnout, the horses spent most of the time eating. After 1 hour of being turned out, eating decreased, and occupation, locomotion, and social interaction increased. When turnout was allowed in groups (GT), the horses spent more time in social interactions and less time walking and trotting than in ST. Therefore, they also covered a greater distance in ST than in GT. The distance covered in ST also showed a greater deviation both within and between days compared with GT.     

江西武夷山国家级自然保护区南方铁杉资源调查初报

利用GPS绕测,定位南方铁杉分布边界的坐标,输入GIS系统中绘制分布图并求算面积。发现江西武夷山国家级自然保护区的南方铁杉主要分布在海拔1 300～2 000 m的阴坡或谷地,最大株胸径有127.0 cm,最高分布于海拔2 070 m,分布最低海拔1 105 m,自然更新良好,分布面积达1 560 hm2,全国罕见。