I remember visiting a large manufacturing factory last year, where the factory manager pointed to a wall full of dashboards and said: “Look, we have over 200 machines, and it takes 3 people just to read the meters every day.” “But the most frustrating part is that despite having so many energy-saving devices installed, energy … Read more
Everyone, before learning Python, I always thought it was exclusive to programmers, who just code all day, and had nothing to do with ordinary people. However, after learning it, I found out that this thing is simply a “universal cheat tool” that opened the door to a new world for me! Why is Python so … Read more
Most of my categories are recorded while I learn, so they tend to be more like notes and somewhat rough. 01 — Theoretical Three Steps of Analysis Report Step One: Identify Our Business Needs As a job seeker, it is important to understand the market situation for Python, such as: application fields (software development, scientific … Read more
The Internet of Things (IoT) connects various elements in water conservancy infrastructure (such as water, equipment, and environment) through sensors, communication networks, and data analysis platforms, enabling real-time perception, precise monitoring, intelligent management, and automatic control, thereby fundamentally transforming traditional water management models. 1. Core Role: From “Passive Response” to “Proactive Intelligence” Traditional water management … Read more
This week, with a series of economic data released in the U.S., the non-farm payroll data has been significantly revised downwards, and discussions about economic recession have become increasingly prominent. The CME FedWatch tool shows that for the Federal Reserve’s meeting on September 18, 2025, the probability of a 25 basis point rate cut has … Read more
Author: Wu Qiong, Lu Jing In government investment auditing, the review of the bidding process for construction projects is a key focus. The traditional auditing method involves manually comparing unstructured bidding documents to identify clues of collusion and bid-rigging, which not only consumes a lot of manpower and time but also results in subjective comparisons … Read more
As a data analyst, have you encountered these scenarios: You receive a messy dataset and want to quickly extract key information but get stuck on string processing; while cleaning data with pandas, you cause feature extraction chaos due to list slicing errors; when writing analysis scripts, you mess up category mapping because you’re not familiar … Read more
Citation Information：Yan, Y., Wen, X., Mei, J. et al. A stable Arctic amplification ratio in long-term transient simulation over the last 21,000 years. npj Clim Atmos Sci 8, 321 (2025). https://doi.org/10.1038/s41612-025-01212-8 Main Content: The paper investigates the changes in the Arctic Amplification (AA) phenomenon over the past 21,000 years and explores the underlying physical mechanisms. … Read more
Introduction Traditional relational databases, such as MySQL and PostgreSQL, often face performance bottlenecks when handling large-scale data. Data warehouses require complex deployment and maintenance. A “newcomer” in the database field—DuckDB—is changing the way we analyze data with its unique charm. What is DuckDB? In simple terms, DuckDB is anembedded, in-process, OLAP database. Embedded: This means … Read more
Table of Contents 1. General Commands 2. Operators 3. Programming Language Constructs 4. Basic Matrix Functions and Operations 5. Basic Mathematical Functions 6. Coordinate Transformations, Vector Operations, and Other Special Functions 7. Matrix Functions and Numerical Linear Algebra 8. Data Analysis 9. Polynomials, Nonlinear Equations, and Ordinary Differential Equations 10. Plotting Functions 11. File Operations … Read more