Results 21 to 30 of about 1,066,218 (148)
Zhejiang Daxue xuebao. Lixue ban, 2016 距离计算在计算机辅助几何设计与图形学领域有着广泛的应用.为了有效计算点到代数曲线的最短距离，提出了一种基于区间算术和区域细分的细分算法.利用四叉树数据结构对给定区域进行细分，用区间算术计算细分后所有像素点到给定点的距离区间，得到最小距离区间.该方法的优势在于在得到任意精度的点到代数曲线最短距离的同时，亦得到了该结果的最大误差限.为进一步提高速度，还对算法进行了改进.
QIJiadai(祁佳玳) +1 more
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World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
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Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT The intersection of immigration and welfare has taken a central stage in the politics of social policy and garnered increasing scholarly attention in welfare politics research. While prior research has examined how immigration affects welfare support and welfare generosity in the US, less is known about the determinants of immigrant‐related ...
Ping Xu, Ling Zhu, Sebastian Ege
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Dianci bileiqi, 2022 利用二维时域有限差分算法(FDTD),构建了真实地形下的雷电电磁波传播模型，研究了乌鲁木齐周边区域山地地形对雷电电磁波传播的影响，然后提出了一种修正闪电定位误差的方法即不同步长的地形包络法。模拟结果表明：1)山地地形会明显改变切向磁场的波形峰值大小和上升沿时间，给闪电定位带来误差，波形峰值变化最大的增加了57%,上升沿时间增加范围在1～5μs,相比平地最大定位误差增加了3 800 m。2)步长为10 km的地形包络法修正效果最好，最大修正了510 m的定位误差。
杨敢 +5 more
doaj
From the Margins: Potential Coalitions in Centralized, High‐Capacity States
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT The early stages of coalition formation remain an understudied area, particularly in centralized, high‐capacity political systems. Examining actor dynamics at this formative stage can reveal how coalitions form and how limited pluralism constrains their development.
Sreeja Nair, Yuhao Ba, Mohnish Kedia
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Gongye shui chuli纳米限域催化技术通过精准调控活性位点的空间分布与反应微环境，优化限域结构设计，显著提升了催化体系的催化效率、稳定性及耐久性。系统综述了孔道限域、核壳限域、晶格限域、表面空间限域和综合各种限域类型的多重限域策略的设计原理，揭示了活性位点分散优化、反应物富集、传质强化、毒副反应规避等多维协同机制，对比分析了各限域策略的优缺点及其在光催化、过氧化氢活化等环境治理高级氧化技术中的应用。最后展望了该技术未来的研究方向，提出未来应在该类催化剂对新污染物的靶向治理、催化剂的绿色合成与循环利用 ...
鹿晓菲 +5 more
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Shuitu Baochi Xuebao, 2002 探讨小流域土地利用规划的理论与方法问题 ,初步提出 4个工作研究部分 ,首先要进行小流域的生态经济系统分析 ,明确小流域在不同位置上的功能差异和存在的问题 ;其次根据小流域的自然和社会经济特点 ,采用土地适宜性评价 ,研究小流域的自然适宜性 ,生态经济系统的投入产出分析 ,分析小流域农业经济发展优势 ,确定其最佳农业产业结构和具体的优化目标 ;再用目标规划确定其数量结构 ;最后根据土地适宜性评价结果和景观生态学的理论和方法 ,确定其土地利用空间布局 ,最终将最大限度地使小流域土地得到优化配置 ...
王印传
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Engineering Photothermal Nanoplatforms for Multimodal Theranostics and Biosensing
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photothermal platforms bridge materials science and biomedicine, emerging as a transformative frontier in biomedical applications. They offer spatiotemporally precise, noninvasive modalities with cell‐type‐independent efficacy for treating a range of diseases.
Xiao Han +3 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Wearable sweat sensors face persistent trade‐offs between multiplexed detection, signal stability, and wearing comfort. Here, we present a Janus electronic skin (e‐skin) with dual‐mode functionality, offering both thermal and moisture comfort.
Zhi‐Mei Mu +12 more
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