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NWP | WRF-DA | Outer vs. Inner Loops | Incremental approach | Dual-resolution

NWP | WRF-DA | Outer vs. Inner Loops | Incremental approach | Dual-resolution

WRF-DA In WRF Data Assimilation (WRF-DA), particularly for 3DVar (Three-Dimensional Variational) and 4DVar, the use of "loops" is a strategy to handle the inherent non-linearity of the atmosphere whil

2026-04-27

NWP

#MPAS #WRF #NWP #GFS #FNL #ERA5 #DA #IFS #CMA

ML | PINN Reading List

ML | Physics-informed neural networks (PINN) ML | PINN | DeepXDE 原来好多人都不知道PINN的鼻祖文章是这几篇啊自动微分（AutoDiff） - AI4Science的核心基础技术当AI学会算流体：用PINN求解圆柱绕流问题 Ang EHW, Wang G, Ng BF. Physics-Informed Ne

2026-04-22

ML

#PINN #AI #DeepONet #ML

Linux | conda | Make package/environment creation much faster

Linux | conda | Make package/environment creation much faster

Conda/Micromamba How to speed up the micromamba install process (both installing micromamba itself and, more importantly, creating environments + installing packages with it). 1. Install micromamba

2026-04-20

Linux

#Micromamba #conda

Linux | conda | libtinfo.so.6 no version information available

Linux | conda | libtinfo.so.6 no version information available

Conda/Micromamba Error The error libtinfo.so.6: no version information available typically occurs because the ncurses package provided by the default Conda channel lacks symbol version

2026-04-20

Linux

#Micromamba #conda

NWP | WGS-84（國際標準、GPS原始坐標）與 GCJ-02（國測局坐標，又稱「火星坐標系」）

NWP | WGS-84（國際標準、GPS原始坐標）與 GCJ-02（國測局坐標，又稱「火星坐標系」）

在中國大陸，地理資訊不只是「地圖」而已，它被視為國家安全的重要組成部分。這種特殊的政策環境催生了地圖開發中獨有的「偏移」現象。 WGS-84 與 GCJ-02 之間的差異 1. 核心坐標系對比坐標系名稱俗稱定義與用途 WGS-84 地球坐標國際標準。由 GPS 衛星直接返回的原始經緯度。Google Earth（全球版）使用此標準。 GCJ-02 火星坐標中國國家標準

2026-04-10

NWP

#MPAS #WRF #NWP #GFS #FNL #ERA5 #IFS #CMA

NWP | ECMWF（歐洲中期天氣預報中心）的IFS（Integrated Forecasting System）購買數據實際成本

NWP | ECMWF（歐洲中期天氣預報中心）的IFS（Integrated Forecasting System）購買數據實際成本

NWP | ECMWF | IFS | Open data IFS 歐洲中期天氣預報中心（ECMWF）的IFS（Integrated Forecasting System）數據，目前主要採用開放數據政策，數據本身基本免費，但根據使用方式和交付需求，可能產生服務費（分發/傳輸成本）。購買 ECMWF（歐洲中期天氣預報中心）IFS（整合預測系統）數據的成本在 2025 年 10 月 1 日之後發生

2026-04-09

NWP

#MPAS #WRF #NWP #GFS #FNL #ERA5 #IFS #CMA #BUFR

AI | ollama + OpenClaw + gemma4

AI | ollama + OpenClaw + gemma4

Build Reinstall Ubuntu on an older computer. 1234567sudo apt update && sudo apt install -y build-essential python3 make cmakesudo apt install openssh-serverip addrsudo systemctl status sshls

2026-04-04

AI

#AI #ollama #OpenClaw #gemma4

CFD | Gmsh | meshing

CFD | Gmsh | meshing

Gmsh Gmsh is an open source 3D finite element mesh generator with a built-in CAD engine and post-processor. Its design goal is to provide a fast, light and user-friendly meshing tool with parametric i

2026-04-01

CFD

#HPC #OpenFOAM #Gmsh #meshing

Linux | Python Profiler

Linux | Python Profiler

Whether you're trying to figure out why your script is crawling or you just want to optimize a specific function, Python has some built-in heavy hitters to help you find those bottlenecks. Here is the

2026-03-23

Linux

#python #Profiler #cProfile #snakeviz #memory_profiler

NWP | BUFR data | GFS - Binary Universal Form for the Representation of meteorological data

NWP | BUFR data | GFS - Binary Universal Form for the Representation of meteorological data

Binary Universal Form for the Representation of meteorological data The Global Forecast System (GFS) utilizes Binary Universal Form for the Representation of meteorological data (BUFR), a World Meteor

2026-02-27

NWP

#MPAS #WRF #NWP #GFS #FNL #ERA5 #IFS #CMA #BUFR