基于遥感和历史水位记录的鄱阳湖区淹没风险制图

提出了一种利用多时相遥感影像和历史水位观测资料,利用ArcGIS空间分析功能实现冲积平原区洪水风险制图的方法.首先利用9幅鄱阳湖区不同时相的Landsat TM/ETM+遥感影像,通过非监督分类的方法提取水体淹没范围.根据都昌水文站资料1955-2001年间水位记录,分别计算鄱阳湖洪水多发期(6,7,8月份)和全年各水位的超频率(EP).假设在相同水位条件下具有相同的淹没范围,将遥感获取的水体边界作为EP的等值线,在ArcGIS的支持下,利用等值线插值实现鄱阳湖区洪水多发期和全年的水体淹没风险制图.

光学计量让生产过程得到全方位改进

凭借体量轻的优势，复合材料正日益成为航空航天和汽车行业的新主流。高效迅速地研发各种新型复合材料产品成为这些领域众多制造商的首要目标。然而，复合材料产品的生产面临几火挑战，若不圆满解决，将无法生产出符合客户要求的产品。随着便携式计量解决方案（具体而苦，即光学便携式CMM）的出现，复合材料制造过程中的各种问题和挑战都将迎刃而解。

在车间内检测:需求、时间与方法

对许多生产经理而言。在车间内直接测量零部件可以减少对齐和搬运操作，这是提高生产效率的关键因素之一。然而，相比车间检测，质量控制团队更愿意将待测量零部件送往实验室，在CMM上完成控制。本文旨在解读在车间内高效完成检测过程的原因、时间和方法。

质量控制经理的新型秘密武器

在上述情况中，技术成为QC经理的掣肘，使他们陷入繁杂工作中不得施展。如果CMM负荷满满，如果掌握一件秘密武器情况会如何呢？如果拥有一组可以提高质量检测精度的替代解决方案，情况会如何呢？为了保证QC经理在工作中不会受到掣肘，Creaform形创编写了下面的清单，列出了QC经理可以使用的各种计量工具，以及每种工具的优缺点。

Science to support conservation action in a large river system:The Willamette River,Oregon,USA

Management and conservation efforts that support the recovery and protection of large rivers are daunting,reflecting the complexity of the challenge and extent of effort(in terms of policy,economic investment,and spatial extent)needed to afford measurable change.These large systems have generally experienced intensive development and regulation,compromising their capacity to respond to disturbances such as climate change orwildfire.Functionally,large river and basin management require insights gained from social,ecological,geophysical,and hydrological sciences.This multidisciplinary perspective can unveil the integrated relationship between a river network's biotic community and seasonally variableenvironmental conditions that are ofteninfluencedbyhumanactivities.Large rivers andtheir basins are constantly changing due to anthropogenic influences and as climate modifies patterns of temperature and precipitation.Because of these factors,the state of knowledge must advance to address changing conditions.The Willamette River,in western Oregon,USA,is a prime example of a basin that has experienced significant degradation and investment in rehabilitation in recent decades.Innovative science has facilitated development of fine-scale,spatially extensive datasets and models that can generate targeted conservation and rehabilitation actions that are prioritized across the entire river network.This prioritization allows investment decisions to be driven by site-specific conditions while simultaneously considering potentials for ecological improvement.Here,we review hydrologic,geomorphic,ecologic,and social conditions in the Willamette River basin through time—including pre-settlement,river development,andcontemporary periods—andoffer a futurevisionfor consideration.Currently,detailed informationaboutfish populations and habitat,hydrologic conditions,geomorphology,water quality,and land use can be leveraged to make informed decisions about protection,rehabilitation,and development.The time is ripe for strategic management and goal development for the entireWillamette River,and these efforts can be informed by comprehensive science realized through established institutions(e.g.,public agencies,non-profitwatershed groups,Tribes,and universities)focusedon conservation and management.The approaches to science and social-network creation that were pioneered in the Willamette River basin offer insights into thedevelopment of comprehensive conservation-based planning that could be implemented in other large river systems globally.

基于数字高程模型的鄱阳湖淹水范围制图研究

利用13幅Landsat TM/ETM+鄱阳湖区遥感影像,提取不同水位下的淹水范围,根据淹水面积与湖内7个水文站水位相关性,确定都昌水文站水位能够最好控制鄱阳湖水面范围。为了改善中低水位条件下淹水范围的制图精度,将遥感提取的水体边界作为水位等值线,插值建立鄱阳湖基于水体边界的数字高程模型(taterline-based DEM,WL_DEM),利用WL_DEM和都昌水位实现中低水位淹水范围制图。结果表明,中低水位条件下,基于WL_DEM的淹水范围制图精度都有显著提高。