搜索结果: 1-15 共查到“U-Net”相关记录455条 . 查询时间(0.111 秒)
Use of Optimization Modeling to Assess the Effect of Timber and Carbon Pricing on Harvest Scheduling, Carbon Sequestration, and Net Present Value of Eucalyptus Plantations
timber harvest scheduling mixed-integer programming harvest age carbon sequestration
2023/12/19
Quantifying the impact of carbon (C) and timber prices on harvest scheduling and economic returns is essential to define strategies for the sustainable management of short-rotation plantations so that...
Land Cover and Land Use Change Decreases Net Ecosystem Production in Tropical Peatlands of West Kalimantan, Indonesia
deforestation forest logging tropical climate peat swamp forests oil palm estate NEP
2023/12/8
Deforested and converted tropical peat swamp forests are susceptible to fires and are a major source of greenhouse gas (GHG) emissions. However, information on the influence of land-use change (LUC) o...
Assessment of Drought Impact on Net Primary Productivity in the Terrestrial Ecosystems of Mongolia from 2003 to 2018
terrestrial ecosystem NDVI BEPS NPP drought vegetation response
2023/12/8
Drought has devastating impacts on agriculture and other ecosystems, and its occurrence is expected to increase in the future. However, its spatiotemporal impacts on net primary productivity (NPP) in ...
南京农业大学专利：基于改进U-net网络的无人机麦田遥感图像分割方法
U-net网络 无人机 麦田遥感图像 分割方法
2023/11/27
本发明提出基于改进U?net网络的无人机麦田遥感图像分割方法，通过加入注意力模块的方式加强目标特征学习，同时通过改进损失函数的方法对权重进行重分配，从而解决遥感图像中目标背景类别分布不均的问题；最后，结合形状先验信息对分割结果进行进一步修正。本发明利用采集的无人机麦田数据集进行训练和模型验证，试验结果表明，分割准确率和平均交并比分别达93.31％和73.91％，较好解决了田埂分割遮挡和缺失等问题。
Podcast: Gender balance in nuclear, and the EU's Net Zero Industry Act
核能领域 净零排放法案 Gender balance
2023/4/6
An international survey has highlighted the need for a better gender balance in the nuclear sector, but how to achieve it? That's one of the issues discussed with Corhyn Parr, CEO of Nuclear Waste Ser...
The European Commission (EC) has proposed the Net-Zero Industry Act (NZIA) to scale up manufacturing of clean technologies in the EU and make sure it is well-equipped for the clean-energy transition. ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：HT-Net: Hierarchical Transformer based Operator Learning Model for Multiscale PDEs
HT-Net 分层变压器 多尺度 偏微分方程 算子学习模型
2023/5/6
Complex nonlinear interplays of multiple scales give rise to many interesting physical phenomena and pose major difficulties for the computer simulation of multiscale PDE models in areas such as reser...
MIT expands research collaboration with Commonwealth Fusion Systems to build net energy fusion machine, SPARC（图）
英联邦聚变系统公司 能量聚变机 SPARC 聚变发电厂
2023/6/19
MIT’s Plasma Science and Fusion Center (PSFC) will substantially expand its fusion energy research and education activities under a new five-year agreement with Institute spinout Commonwealth Fusion S...
利用密度泛函理论和非平衡态格林函数相结合的方法，系统地研究了边修饰Net-Y纳米带的电子结构和器件特性的应变调控效应。计算表明：本征纳米带为金属，但边缘的氢或氧原子端接能使其转变为半导体。应变能有效地调控纳米带带隙的大小，适当的应变使能带结构从间接带隙转变为较小的直接带隙，这有利于光的吸收。应变也能改变纳米带的功函数，压缩应变能明显减小功函数，这有利于纳米带实现场发射功能。特别是应变能有效地调控纳...
'Like a fishing net,' nanonet collapses to trap drug molecules（图）
nanonet collapses trap drug molecules
2020/10/10
Scientists are casting a net for nanoparticles.A Northwestern University team has discovered a new, rapid method for fabricating nanoparticles from a simple, self-assembling polymer. This re...
基于U-Net神经网络的多模态MR颈动脉血管成像的分割方法研究
神经网络 颈动脉 动脉粥样硬化 磁共振成像
2020/3/5
探讨基于U-Net神经网络的多模态MR影像颈动脉血管分割方法的价值。回顾性分析了2012年至2015年中国动脉粥样硬化风险评估研究项目中，经标准多模态MR扫描，且两周内出现缺血性脑卒中或短暂性脑缺血的患者。经纳入标准和排除标准筛选后，有658例患者共17 568层颈动脉血管壁影像纳入研究。应用定制设计的心血管疾病评估计算机辅助系统（CASCADE，华盛顿大学血管成像实验室，西雅图）对所有影像数据进...
NET-1通过激活EMT过程促进肺鳞癌转移
神经上皮细胞转化基因1 上皮-间充质转化 肺鳞状细胞癌 转移
2020/9/17
探讨神经上皮细胞转化基因1（NET-1）表达对肺鳞癌（LSC）转移的影响及分子机制。方法：免疫组化检测53例肺鳞癌（LSC组）、24例正常肺上皮（NLE组）及27例肺鳞状上皮内病变（SIL组）组织中NET-1蛋白的表达，并统计分析其表达水平与临床病理因素的相关性；Western blot实验检测人肺鳞癌细胞系H226、H1703、H2170、SK-MES-1、H520和YTMLC-90中NET-1...
Does the net primary production converge across six temperate forest types under the same climate?
Carbon allocation Elemental stoichiometry Net primary production Nutrient availability Temperate forest
2024/3/8
Quantifying net primary production (NPP) and its allocation is essential for understanding and modeling the carbon (C) cycling in forest ecosystems. We used biometry-based measurements to examine the ...
SPATIO-TEMPORAL CHANGES OF NET PRIMARY PRODUCTIVITY AND ITS RESPONSE TO PHENOLOGY IN NORTHEAST CHINA DURING 2000–2015
Northeast China NDVI Net Primary Productivity Phenology Spatio-temporal Changes
2018/5/15
The relationship between net primary productivity (NPP) and phenological changes is of great significance to the study of regional ecosystem processes. In this study, firstly, NPP was estimated with t...
QUANTIFYING THE CONTRIBUTIONS OF ENVIRONMENTAL PARAMETERS TO CERES SURFACE NET RADIATION ERROR IN CHINA
CERES surface net radiation China environmental parameters error contributions
2018/5/15
Error source analyses are critical for the satellite-retrieved surface net radiation (Rn) products. In this study, we evaluate the Rn error sources in the Clouds and the Earth’s Radiant Energy System ...