Results 21 to 30 of about 622,398 (259)
Gaoya dianqi, 2021 为提高模型修正的精度和效率,发展了一种基于神经网络响应面的动力学模型修正方法,将该方法用于有载分接开关底座有限元简化模型的修正。首先,根据底座简化模型的误差来源确定待修正参数及其设计空间,采用均匀设计生成神经网络响应面模型的训练样本;然后,通过对样本数据的训练构造修正参数与动力学响应关系的神经网络响应面模型;最后,基于神经网络响应面模型,采用线性组合的多目标优化方法对底座简化模型进行修正,并将修正结果与超模型仿真数据进行对比。研究表明 ...
刘志远 +4 more
doaj
Wildlife Letters, EarlyView.Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu +5 more
wiley +1 more source
Construction method of vertebral body geometric shape statistical model fused curvature features
Xibei Gongye Daxue Xuebao, 2022 现有医学样本库缺乏不同年龄段脊椎的几何形态统计模型, 因此建立一个精度较高、定位准确的椎体几何形态统计模型库就显得迫在眉睫。提出一种基于融合曲率特征的椎体三维几何统计模型构建方法, 根据曲率特征对人体腰椎三维重建模型进行识别和定位, 输出各模型的样本矩阵; 用优化的ICP算法对样本矩阵进行对齐与配准; 用PCA对样本模型进行配准训练, 组成统计模型样本库。
HUI Yu +4 more
doaj +1 more source
Wildlife Letters, EarlyView.Reported annual per‐capita harvest of muskrats (PCHM) decreased as wetland complexity (total number of wetland patches) decreased in 13 state and federal wetland areas in the Midwest, USA. Our results support the hypothesis that regional‐scale declines in the abundance of muskrats are likely associated with the losses to wetland habitats throughout the
Tim L. Hiller +5 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Guangtongxin yanjiu, 2006 光因特网是能提供高带宽的下一代因特网,对其互联模型的研究是目前光因特网研究中的一个热点。文章分析了互联模型由重叠模型向对等模型演进的基本趋势,并在对比固有的3种互联模型———对等模型、重叠模型及增强模型的基础上,提出了一种新的演化模型———混合模型,这种模型能够支持对等模型与重叠模型的共存,文章对其实现的原理与机制进行了论述。
冯首强, 纪越峰
doaj
Organ‐specific ozone and nitrogen legacies strengthen substrate control over litter decomposition
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Elevated tropospheric ozone (O3) and nitrogen (N) deposition are concurrent atmospheric changes that strongly influence terrestrial carbon cycling, yet their combined effects on below‐ground decomposition remain poorly understood.
Xiaofan Hou +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2003 波涌灌溉土壤间歇入渗数学模型是进行波涌灌溉田面水流运动数值模拟和灌水方案优 化设计的基础.本文介绍了国内外波涌灌溉土壤间歇入渗的几类主要数学模型:Richards模 型、权重函数模型、Kostiakov-Lewis模型或Kostiakov模型、周期-循环率模型、梯函数模 型和其它模型的应用现状,并进行了分析和评价.
吴军虎, 费良军, 李怀恩, 赵茜
doaj
Dianxin kexue随着人工智能（artificial intelligence，AI）的兴起，大模型（large language model，LLM）日益成为知识推介和多轮对话的核心技术。伴随而来，AI大模型在数据处理、模型训练和部署过程中的高能耗问题亟须有效评估，以便在模型优化后进行前后量化对比。提出一种AI大模型能耗的评估方法，旨在量化评估AI模型的服务效率（efficiency，E）。该模型使用训练收敛时间（time，T）、模型参数规模（parameter，P）和浮点运算量（floating-point ...
马晓亮， 刘英， 赵汝强， 杨邦兴， 高洁， 邓从健
doaj +1 more source
Looking at Us Through Their Eyes. The Analytical Process from Ethnographic Perspectives1
Journal of Analytical Psychology, EarlyView.Abstract This article looks at the analytical situation through the Others’ eyes—through examples from contemporary ethnographies of foreign cultures. It discusses the following issues: a) The analogy between the ontological worlds of the dead, ghosts, animals and dreams in “primitive populations” and the analytical psychological descriptions of the ...
Stefano Carta
wiley +1 more source