Results 31 to 40 of about 929,950 (211)
World Water Policy, Volume 12, Issue 3, August 2026.ABSTRACT In Ghana, the government has initiated a reform in rural water management to shift away from community‐based management (CBM) to state management, but research assessing the reform is still insufficient. This study aims to critically evaluate the impact of the reform in addressing rural water challenges.
Ernestina Ohenewaah Denchie, Kevin Lo
wiley +1 more source
, 2017 地理视频（GeoVideo）是集成视频数据与空间数据进行地理信息表达的新方法，近20年来，国内外学者在视频GIS领域进行了相关研究。已有研究所表达的地理视频空间信息直观性差，不利于视频影像判读。此外，已有研究成果大多采用地面采集设备获取视频数据，而利用无人机获取资料的研究较少，其中关于无人机视频与三维GIS集成的相关研究更是少有报道。无人机遥感具有机动灵活、成本低、时效性强等优势，已成为获取地面数据的重要手段。提出适用于三维GIS的无人机地理视频数据模型，将无人机遥感获取的视频信息与三维GIS集成 ...
陈光
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基于无人机遥感的黑龙江南瓮河国家级自然保护区驼鹿种群数量及空间分布调查
野生动物学报, 2023 2022年3月下旬，利用固定翼无人机对南瓮河国家级自然保护区内驼鹿（Alces alces）进行航拍调查，估算及分析保护区内驼鹿的种群数量、分布密度和生境因子之间的关系。结果表明：获取无人机影像17 818张，无人机样带拼接面积为206.9 km2。结合目视解译方式识别驼鹿并据此建立驼鹿无人机影像解译标志库。根据无人机样带解译结果，得到驼鹿的种群密度为（0.174±0.038）只/km2，估算出保护区驼鹿的种群数量为310~484只。驼鹿的分布及生境选择中生态因子的分析结果表明，驼鹿主要分布于海拔400~
王劭文 +5 more
doaj
Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities
Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner +10 more
wiley +1 more source
, 2013 编者按：在中国空气动力学会举办的“空气动力学春节学术座谈会”上，中国航天空气动力技术研究院李锋院长做了题为《空气动力与无人机》的专题报告，受到与会人的热烈欢迎。编辑部对李锋向我们提供该报告的ppt文本深表谢意，并特此刊载以飨读者。 空气动力与无人机 李 锋李锋， 男，1961年出生于北京，西北工业大学流体力学专业博士，现任中国航天空气动力技术研究院院长，研究员 ...
何郁编撰
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Powerful representation of the poor? German welfare associations' narrative advocacy during COVID‐19
Policy Studies Journal, Volume 54, Issue 3, August 2026.Abstract The COVID‐19 pandemic sparked unprecedented experimentation in the German social assistance system, leading to changes previously considered impracticable by policymakers. This included a sanctions moratorium, easier access to benefits, and temporary cash transfers, all of which were advocated by welfare associations—key organized interests ...
Christopher Smith Ochoa
wiley +1 more source
Do Criminalization Policies Impact Local Homelessness?
Policy Studies Journal, Volume 54, Issue 3, August 2026.ABSTRACT Local criminalization policies draw on the logic of deterrence to levy costs on individuals who engage in behaviors that are closely associated with various public concerns, such as those criminalizing behaviors associated with homelessness, thereby potentially reducing community‐level costs.
Hannah Lebovits, Andrew Sullivan
wiley +1 more source
, 2002 仿人机器人腰部的构成对仿人机器人的运动学、动力学性能起着重要的作用。本文着重分析了目前仿人机器人腰部机构存在的问题,提出了一种具有柔性特征的仿人机器人腰部设计方案。本设计使仿人机器人具有良好的柔顺性,提高了机器人与人协作时的安全性 ...
赵铁军, 赵明扬
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