ML | U-Net U-Net The U-Net architecture follows an encoder-decoder cascade structure, where the encoder gradually compresses information into a lower-dimensional representation. Then the decoder decodes this inf 2024-12-13 ML #AI #ML #pytorch #U-Net
ML | GNN Graph Neural Network Model Overview of Graph Neural Networks (GNNs) Graph Neural Networks (GNNs) are a specialized type of neural network designed to process and analyze graph-structured data. Unlike traditional neural networks 2024-12-12 ML #NWP #ECMWF #AI #ML #pytorch #GNN
ML | PyTorch PyTorch 2017 年初由 Facebook 開源的另一套建立在 Torch 之上的深度學習框架 PyTorch 因其語法簡潔優雅、概念直觀和易上手的特性,甫推出便迅速走紅,儼然已成為瓜分深度學習市場的有力競爭者。 PyTorch is an optimized tensor library for deep learning using GPUs and CPUs. Automatic d 2024-12-12 ML #PINN #AI #DeepONet #ML #pytorch
Maths | ROC Curves ROC curve 在訊號檢測理論中,接收者操作特徵曲線,或者叫 ROC 曲線(Receiver operating characteristic curve),是一種坐標圖式的分析工具, 用於選擇最佳的訊號偵測模型 、 捨棄次佳的模型 或者 在同一模型中設置最佳閾值。 在做決策時,ROC分析能不受成本/效益的影響,給出客觀中立的建議。 ROC曲線 (Receiver operating ch 2024-12-10 Maths #NWP #AI #ML
MPAS | Smagorinsky turbulence model | Eddy viscosity Large eddy simulation (LES) Large eddy simulation (LES) is a mathematical model for turbulence used in computational fluid dynamics. It was initially proposed in 1963 by Joseph Smagorinsky to simulate 2024-12-10 MPAS #NWP #WRF #MPAS #HPC
WRF | MPAS | MPI | halo/ghost cell Message Passing Interface (MPI) 訊息傳遞介面(Message Passing Interface,縮寫MPI)是一個平行計算的應用程式介面(API),常在超級電腦、電腦叢集等非共用主記憶體環境程式設計。 The message passing interface effort began in the summer of 1991 when a small grou 2024-12-07 WRF #NWP #WRF #MPAS #HPC #MPI #halo cell #ghost cell
MPAS | MPAS-A Idealized Test Cases MPAS-Atmosphere idealized test cases https://mpas-dev.github.io/atmosphere/test_cases.html The downloads below for MPAS-Atmosphere idealized test cases include the following: 2024-12-06 MPAS #NWP #WRF #MPAS #HPC
CFD | OpenFOAM | STL file | 網格生成 OpenFOAM三維網格生成器 snappyHexMesh(SHM)是OpenFOAM軟體的三維結構化網格生成模組,功能比較強大,設定靈活,表面處理貼合功能非常強健並且可以並行運算。 SHM能夠透過使用者自訂參數(如細化參數castellatedMeshControls、切合參數snapControls等)對預先載入的幾何體檔案(通常為'.stl'檔案)自動實現三維網格生成、加密(castella 2024-12-05 CFD #HPC #OpenFOAM
Maths | p-value | Statistical Significance p-value In null-hypothesis significance testing, the p-value is the probability of obtaining test results at least as extreme as the result actually observed, under the assumption that the null hypoth 2024-12-05 Maths #NWP #AI #ML
CFD | OpenFOAM | In parallel Running applications in parallel Both domain decomposition and reconstruction processes can only be done on a single core. This section describes how to run OpenFOAM in paralle 2024-12-04 CFD #HPC #OpenFOAM