Results 11 to 20 of about 4,180 (118)
基于改进RRT*-Smart的复杂动态环境下的无人艇路径规划
智能科学与技术学报, 2022 针对在多移动障碍船的复杂动态环境下无人水面艇的路径规划问题，设计了一种基于改进 RRT*-Smart的无人艇路径规划方法（RTSNew）。该方法首先优化了节点采样方式，在以无人艇为原点的极坐标系中进行采样，采用椭圆形的采样点范围约束以避免无效采样，增加了历史路径缓存池以充分利用历史路径。该优化大幅降低了计算量，提高了路径规划的速度。其次，改进了节点拓展方式，为了避免将动态障碍作为静态障碍处理，给每个拓展节点增加时间信息以实现动态碰撞检测，对动态障碍运动信息的充分利用大幅提高了路径的可行性。同时 ...
董璐, 熊爱玲
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Matching forerunner cities: Climate policy in Turku, Groningen, Rostock, and Potsdam
Review of Policy Research, Volume 40, Issue 6, Page 1004-1025, November 2023., 2023 Abstract This article analyzes and compares the climate policy and transformation pathways of the forerunner cities Turku (Finland), Groningen (The Netherlands), Rostock, and Potsdam (both located in Germany). Our study combines an international comparison of cities located in three different countries with a national comparison of two German cities ...
Kristine Kern +3 more
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Conservation Biology, Volume 36, Issue 4, August 2022., 2022 Abstract As ecological data and associated analyses become more widely available, synthesizing results for effective communication with stakeholders is essential. In the case of wildlife corridors, managers in human‐dominated landscapes need to identify both the locations of corridors and multiple stakeholders for effective oversight.
Jay M. Schoen +13 more
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Shuitu Baochi Xuebao, 2021 为明确滇南地区普洱茶种植下土壤优先路径特征以及根系对其形成的影响，以典型普洱茶产地为研究对象，灌草地为对照，基于染色示踪法与图像处理技术，定量分析普洱茶树根系特征与土壤优先路径的关系，解释根系对优先路径形成的影响。结果表明：（1）茶地和灌草地染色路径宽度随土层深度增加呈不同幅度的下降趋势，茶地优先路径的连通性比灌草地差，优先路径的发育程度小于灌草地；（2）根系主要集中分布在土壤表层，随土层深度增加，根重密度、不同径级根长密度均呈减小趋势，径级≤1 mm的根长密度贡献度最大，达到84.08%；（3 ...
卢华兴 +5 more
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Zhejiang Daxue xuebao. Lixue ban, 2013 针对具有大量道路节点的大型交通网络，提出了一种改进的深度优先算法.该算法在搜索过程中，首先对节点进行方向性选择，缩小了搜索的范围，同时引入启发式搜索函数，优先选择权值较低的点进行扩展，降低了深度优先的盲目性.因此，算法不仅能够在搜索早期找到最短路径，还能够提供多条备选路径.
FANGJia(房佳) +4 more
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A network approach to prioritize conservation efforts for migratory birds
Conservation Biology, Volume 34, Issue 2, Page 416-426, April 2020., 2020 Abstract Habitat loss can trigger migration network collapse by isolating migratory bird breeding grounds from nonbreeding grounds. Theoretically, habitat loss can have vastly different impacts depending on the site's importance within the migratory corridor.
Yanjie Xu +8 more
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Dianci bileiqi, 2023 耐张塔是高海拔地区最为复杂的塔型，其附近电场计算较为困难，给基于电场分析的带电作业进入路径的选取带来较高难度。笔者选取耐张塔作为研究对象，首先仿真分析了作业区域内人体体表电场强度，接着以所受平均最大场强最小以及进入路径最短作为双重优化目标，进行基于遗传算法多目标优化，得到进入路径最优解。然后对该路径下的电位转移电流进行仿真计算，基于结果对安全防护提出要求。考虑到目标作业导线离横担距离小于塔身的这一工况，提出了一种变绳长的等电位进入方法，该法具有作业人员平均体表场强最小，安全性更好的优点。最后开展现场实测，
周林 +4 more
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Accessing Ultra‐Nano Phase‐Separated Metallic Glasses via Cryogenic Cycling
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Phase separation offers a promising avenue to mitigate the inherent brittleness of metallic glasses. However, traditional approaches relying on mixing enthalpy face significant challenges, primarily due to the detrimental impact on glass‐forming ability.
Huaping Ding +15 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Achieving rapid and selective separation of anode and cathode materials remains a critical challenge in the recycling of spent lithium‐ion batteries. This study develops a microwave‐enhanced flotation strategy for the efficient recovery of cathode and anode materials.
Peiyuan Ye +5 more
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Unveiling Entropy‐Driven Hard‐Tough Synergy Mechanisms in High‐Entropy Carbonitride Ceramics
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT High‐entropy ceramics manifested promise for extreme environments, yet their phase stability and mechanical synergy mechanisms remain elusive. Herein, entropy‐difference carbonitrides, including (TaTiV)CN, (TaTiVNb)CN, and (TaTiVNbHf)CN, were designed and consolidated via spark plasma sintering.
Long Zhao +6 more
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