Lisa's notes: musings on daily life, work, study, personal growth, and casual reflections.
The note explains Java's variable hiding where a subclass field with the same name as a superclass field conceals the original, demonstrates it with a Father‑Son example, shows the output, and warns that such practice can hurt code readability.
The article explains distributional semantics in NLP, describing how the distributional hypothesis links word meaning to context, how co‑occurrence matrices are built from example sentences, why these matrices are large and sparse, and how SVD‑based LSA reduces them to dense word vectors.
This article provides concise answers to frequent Natural Language Processing questions, covering the distinction between NLP and NLG, popular pretrained models, deep‑learning architectures, word‑vector techniques, named‑entity recognition, sentiment, semantic and syntax analysis, part‑of‑speech tagging, language models, core tasks, real‑world applications, challenges, future trends, interpretability, and essential tools and libraries.
This article introduces the basics of Natural Language Processing, covering core tasks such as language understanding and generation, common applications, essential linguistic analyses, environment setup with Python libraries, hands‑on code examples for preprocessing, POS tagging, NER, sentiment analysis using both classical and transformer models, text generation with GPT‑2, and discusses challenges and Rust‑centric integration strategies.
The article recounts a real‑world eight‑month, 8.94‑million‑yuan smart‑device project for an operator, detailing how the project manager applied scope‑management planning, requirement collection, WBS creation, and change control to overcome hardware, resource, and certification challenges and deliver the product on schedule.
The article explains how repeated loops for printing numbers 1‑10 cause code duplication and maintenance issues, then teaches Python function syntax, naming rules, and usage through clear examples that encapsulate the logic into reusable functions.
This article explains Java object type conversion, covering upcasting (implicit parent‑to‑child casting) and downcasting (explicit child‑to‑parent casting), their safety rules, static method behavior, and how to use the instanceof operator to avoid runtime errors.
This note explains how Python variable assignment creates references, demonstrates the differences between shallow and deep copying of lists, and provides concrete code examples showing how modifications affect original and copied objects for both one‑dimensional and multi‑dimensional lists.
This note explains Java inheritance, covering the single‑inheritance class hierarchy, a Car class example, a ChildCar subclass that adds a load field, and eight key inheritance capabilities such as member reuse, method overriding, and constructor chaining, illustrating why inheritance improves code reuse and quality.
This tutorial walks through essential Python data structures, showing how to retrieve a dictionary's length, keys, values, and items, iterate using four different patterns, merge dictionaries with update, and then introduces sets—covering creation, properties, and common operations such as add, update, pop, remove, discard, clear, and iteration—with concrete code examples and their outputs.
