Results 41 to 50 of about 1,175,884 (155)
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
, 2022 本发明涉及无人机技术领域，特别涉及一种火炬对接无人机。包括旋翼无人机、机械臂、视觉引导系统及视觉定位系统，其中机械臂设置于旋翼无人机机身的下方，机械臂用于与目标火炬对接；视觉引导系统设置于旋翼无人机机身的正前方，视觉引导系统用于远距离检测目标火炬的位置；视觉定位系统设置于旋翼无人机的旋翼下方，视觉定位系统用于近距离检测目标火炬的位置。本发明可实现无人机在视觉引导系统引导下的大范围全自主火炬对接 ...
杨丽英 +8 more
core +1 more source
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
, 2017 本发明属于无人海洋机器人领域，具体地说是一种无人海洋机器人操舵装置，包括舵承组件、舵叶及分别位于机器人载体内部的液压缸支座、后转轴、液压缸、前转轴、舵柄，液压缸支座安装在机器人载体内部，液压缸通过后转轴与液压缸支座连接；舵承组件穿过机器人载体上开设的舵承孔，并安装在机器人载体上；舵柄的一端通过前转轴与液压缸的活塞杆连接，另一端与舵承组件中的舵轴位于机器人载体内部的一端相连，舵叶安装在舵轴位于机器人载体外部的另一端连接。本发明应用平面二级杆组运动原理设计，结构设计紧凑简单、可靠性高，可承受双向轴向载荷 ...
郑荣 +4 more
core
Gaoya dianqi, 2013 无人机数据链系统是无人机系统的核心组成部分,为了验证其在超宽带电磁脉冲（UWB）场环境下的安全性及可靠性,在开阔场搭建了UWB电磁脉冲辐射系统。利用UWB电磁脉冲辐射系统对无人机数据链系统进行辐照效应实验。实验结果表明:单次触发的UWB辐射场不会对无人机数据链系统产生干扰;在连续触发条件下,无人机数据链系统会出现失锁现象,此效应与触发频率和辐照场强有关,且辐照场强与触发频率成反比关系。通过分析得知,无人机数据链路系统受UWB电磁脉冲辐射场干扰的能量耦合通道为"后门"耦合。
张涛, 陈亚洲, 田庆民, 程二威
doaj
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
, 2008 本文对故障诊断和容错技术的发展过程进行了简要综述，并以旋翼无人机为研究对象，在分析其故障诊断与容错控制特点的基础上，介绍了当前国内外在该领域的研究进展和主要方法，随后，给出了中科院沈阳自动化研究所旋翼无人机容错控制方面的研究现状及相关结果。最后，总结了该领域待解决的难点问题 ...
齐俊桐, 吴镇炜, 韩建达
core
Journal of Adolescence, Volume 98, Issue 5, Page 1715-1736, July 2026.ABSTRACT Introduction Following rapid iterations in media technologies, Chinese millennials (born between 1980 and 1995) find themselves in a paradoxical state where digital saturation exists alongside fatigue, making them central practitioners of digital minimalist behavior.
Chao Zhang, Yinze Hao, Jingwen Li
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Light‐activated gas sensors hold significant potential in environmental monitoring and smart Internet of Things (IoT) owing to their advantage in room temperature operation. Nevertheless, due to a narrow light absorption range, high photocarrier recombination rate, and weak redox activity of the sensing material, the performance enhancement of
Jinyong Hu +5 more
wiley +1 more source