Results 61 to 70 of about 137,651 (153)
Gaoya dianqi, 2018 文中提出了一种基于改进支持向量机的变压器实时热点温度预测方法。该方法以变压器负载电流、环境温度和顶层油温为特征值,将变压器热点温度预警与预测相结合,目的在于实现基于近期历史运行数据的变压器实时热点温度预测。文中研究分析了基于改进网格搜索、遗传算法及粒子群算法的支持向量机在变压器短期热点温度预测中的应用效果,结果表明,3种改进方法均可有效提升预测精度,但基于改进网格搜索算法的支持向量机预测效率最高。最后,以某35 k V油浸式变压器实时热点温度数据为样本集,文中所述方法可有效实现变压器短期热点温度预警预测,
廖才波 +5 more
doaj
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams +3 more
wiley +1 more source
智能科学与技术学报, 2021 随着深度学习技术的突破和大型数据集的提出，行人轨迹预测的准确度已经成为人工智能领域的研究热点之一。主要对行人轨迹预测的技术分类和研究现状进行详细的综述。根据模型建模方式的不同，将现有方法分为基于浅层学习的轨迹预测方法和基于深度学习的轨迹预测方法，分析了每类方法中具有代表性的算法的效果及优缺点，归纳了当前主流的轨迹预测公开数据集，并在数据集中对比了主流轨迹预测方法的性能，最后对轨迹预测技术面临的挑战与发展趋势进行了展望。
李琳辉, 周彬, 任威威, 连静
doaj
Psychometric framework for coexistence with large carnivores
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
wiley +1 more source
, 2006 高科技在现代战争中的运用，使得作战环境日益复杂：战况瞬息万变，难以预测。尤其是精确制导导弹的隐蔽性和灵活性，对主战设备坦克、装甲车、自行火炮等构成极严重的威胁。及早发现威胁就成为预警技术的首要任务。光电预警技术是最先进的预警手段，其中的紫外预警以其隐蔽性好、虚警率低、不需低温冷却、体积小、重量轻而倍受瞩目。作为紫外预警系统中的核心器件—紫外探测器就成为研究的焦点。本论文首先分析了国内外紫外探测器的发展和应用，并对其性能和成本作了比较，结合我国紫外探测器的研究现状和需求，设计一种像增强型CCD探测器 ...
张宣妮
core
Dianci bileiqi, 2016 电涌保护器（SPD）在工作状态下会产生一定的泄漏电流,其泄漏电流的值可以反应SPD的老化程度。针对SPD的老化预测问题,利用其产生的泄漏电流,提出一种基于灰色预测模型的SPD老化预判方法。研究表明:灰色预测模型可以较好地应用于SPD泄漏电流的预测中,预测结果误差较小,具有较高的有效性和实用性,从而为SPD老化预判提供一种可能。此外,为电网电力系统中其他设备状态预判提供了一种崭新思路。
张红梅, 李佑光
doaj
Behavioral interventions to reduce demand for threatened freshwater turtles as pets
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Growing demand for freshwater turtles as pets has fueled illegal trade and accelerated wild population declines, underscoring the need for theory‐based demand‐reduction interventions. We conducted a three‐part randomized controlled trial with active turtle keepers (n = 1800) in China to test conservation‐ and legality‐framed messages by ...
Wuji Zheng +9 more
wiley +1 more source
, 2016 沙波运移预测是海洋开发必不可少的一环。通常采用非线性谱分析方法分析沙波实测资料从而预测沙波运移。然而这种方法仅是从统计的角度进行预测,它不包含水动力、加载风速、沙质底床性质等关键因素对沙波运移的影响。对此本文提出了一种谱分析模型解决此类问题。该模型基于沙波形状不变假设,引入波谱能量平均运移速度,考虑了台风产生的风浪和涌浪,利用波浪输沙理论计算台风期间的沙波运移,厘清了一般波流作用和台风作用引起的沙波位移。模型计算结果与实测数据吻合,可以用来预测10 ...
江文滨, 林缅, 曹高辉
core +2 more sources
Predictive evolutionary genomics: principles, validation, and practice
New Phytologist, Volume 252, Issue 1, Page 36-48, October 2026.Summary Climate change and habitat loss are driving rapid evolutionary responses in populations world‐wide, which creates an urgent need for evolutionary forecasting in conservation and agriculture. Such forecasting can be categorized into three time scales: trait‐based models that use multivariate quantitative genetic equations to project correlated ...
Daniel Ortiz‐Barrientos +5 more
wiley +1 more source