Blog
Welcome to My Blog
How to read a paper How to write a review
How to approach a systematic review
From December 2023 to May 23, 2024, I worked on developing a 30m corn and soybean phenology database for the U.S. Corn Belt. As the project comes to a close, I will share my experiences on (i) generating 8-day gap-filled NDVI observations, (ii) extracting five key phenology metrics, (iii) running functions on HPC, and (iv) visualizing the dataset.
Oklahoma Supercomputing Symposium 2024 (https://www.oscer.ou.edu/symposium2024/agenda.html)
I've drafted a document where I share my experiences in downloading data from public websites and digitizing PDF files. Please double-click it to access the document.
Happy New Year. The computation packages of Boltzmann entropy have been released. Users can download them via (https://github.com/Geog0521/Boltzmann_Entropy_Computation_Package). The packages mainly include C++-based ones
The paper entitled “Inferring Radiometric Quality of Multispectral Airborne Laser Scanning Data via Scale-based Boltzmann Entropy ” has been resubmitted to IEEE TGRS with responses to reviewers' comments.
NCL codes for visualizing variables (e.g., temperature, precipitation) in netcdf files can be accessed via Google Drive (https://drive.google.com/drive/folders/1gF2zJkQ0jLa_NqRvrErEaggToeXvePzN?usp=drive_link).
My paper entitled "Modeling information flow from multispectral remote sensing images to land use and land cover maps for understanding classification mechanism" has been published online https://www.tandfonline.com/doi/full/10.1080/10095020.2023.2275625. It takes me almost THREE years to publish our research progress on modeling information flow in map generation with remote sensing image processing.
How to perform WRF-based simulation
I created a PDF file that contains all Unix commands for Compiling and Running WPS and WRF on HPC. Please click here to DOWNLOAD it
WARMING TIPS for computer programming and HPC
(i) Before submitting a request to HPC, please carefully check your codes as far as possible
(ii) Always write high-efficient codes as some functions take lots of computation time
(iii) Always make a backup of codes and data
(iv) Add detailed comments to your codes and create a package of codes that work for processing data (e.g., using GDAL+Python to read GeoTiff files)
NCL-based Plots of U and V Wind fields at time step, t=0 and t=3.
You can find the NCL script and Netcdfiles by clicking here
I have learned how to compile and run WPS and WRF on HPC. I am particularly interested in computer programming and HPC! Here are some useful links to tutorial videos and references provided by NCAR
https://www.youtube.com/watch?v=wzSu-343b-0&list=PLJ_1sjucSSZCTNBRM4D3BfEak-XT7TKJo
https://www2.mmm.ucar.edu/wrf/OnLineTutorial/compilation_tutorial.php#STEP2"
(i) "Climate Change and Terrestrial Ecosystem Modeling"
(i) "Ecological Climatology: Concepts and Applications"
After reading two books written by Gordon Bonan with 3 weeks, I have built a big picture of Ecological Climatology and Terrestrial Ecosystem Modeling. Meanwhile, I find that domain knowledge is extremely important when we investigate the land-atmosphere interactions with data-model synthesis approaches. Bonan introduces basic concepts and models of Terrestrial Biosphere Models, Energy and Mass Transfer, leaf temperature, and so on. In these two books, we can find so many mathematical formulas and theories.
Group photos with Alex Ruane from NASA Goddard Institute for Space Studies
I created a file that records basic notes about machine learning. You can DOWNLOAD it here
Group photos with Richard from Boston Univ, Tong from Penn State Univ, and Yaoping from ORNL
I felt so happy to talk to them.
I attended the ESA meeting 2023 in Portland, Oregon, giving a contributed talk entitled "Modeling Energy Flow from Landscape Gradients to Mosaics with the Law of Energy Conservation". It was my first time to attend ESA. More importantly, I financially supported this travel by myself instead of others as I considered it an important opportunity to talk with ecologists and to share my research results with them.
A new package for calculating Boltzmann entropy of data oragnized in raster form has been released. Please clik here to download it.
I am thrilled to announce that one of the General Research Funding project applications has been approved by University Grant Council of Hong Kong. The project will be ended at the end of 2025. Collaborating with Dr. Yan, I will focus on the radiometric quality improvement of multispectral Airborne Laser Scanning Data.
The brief introduction of this project can be found at https://cerg1.ugc.edu.hk/cergprod/scrrm00542.jsp?proj_id=15221022&old_proj_id=null&proj_title=&isname=&ioname=&institution=&subject=&pages=1&year=&theSubmit=15221022
MALS data of forest scenarios
What abilities should be improved after receiving academic training of around 4.5 years?
(i) The ablity to discover problems
(ii) The ablity to solve problems
(iii) The ablity to independently conduct research
(iv) The ablity to present research results in oral and writing forms
(v) The ablity to undertake the due obligations
Work hard and remember the joys in the academic journey
The research article from my master thesis is citated by other researchers. I feel so happy since the citation form is not "such as". Please see the following screenshots.
I submitted an article to Remote Sensing of Environment. This article has been improved by me and my supervisor for at least 10 times.
I'm writing another article the involves information transformation from images to maps, trying out distill.
I recevied two books: (i) Big Questions in Ecology and Evolution and (ii) The Theory of Ecological Communities
It is so excited to read such books. We are now able to answer some of Big Questions, for instance, phenological respones to climate change over various tree species.
I started to read two books:(i) Fundamentals of Ecology and (ii) Plant Physiology
Started to focus on Ecological Research
Fascinated by the nature of beauty and the happiness of conducting scientific research, I decided to do ecological research with the focus on vegetation phenology and carbon dioxide cycle. I started to consider what I should do and what I can do . I believed that I should first select an excellent supervisor that suits my research interests. Meanwhile, I started to read review articles about phenology that are publised in Nature, Science, PNAS, Global Change Biology, New Phytologist and so on. Reading those articles, I learned the ways of thinking, research, and writing from the side of ecology. More importantly, I considered the potential research topics on vegetation phenology with my rich experience in remotele sensed data processing (Note that remote sensing is always used as a tool for ecological research.) At this moment, I got to know what difficulties I may confront and what solutions I should propose, since I do not have a background in Ecology.
I moved from Hong Kong to Chengdu China and stayed in the quarantine hotel
Tips on improving my writing skills
(i) Reading excellent articles, I will have a look at the article structure, writing style, sentences, plots and charts.
(ii) Following up classical articles from my favorite outstanding scholars,e.g., Peter Huybers at Harvard University, James Clark at Duke University, Geoffrey Hinton at Univ of Toronto, I tried my best to "imitate" them.
(iii)Sending papers to my supervisor for the first-round review. If the supervisor reject my articles, why should we send them to journals?
(iv) Do writing daily
(v) Warming notes:Never try to "please" reviewers and just do yourself
2022 Highlights, 2023 Goals
Year 2022 is so tough