دانلود کتاب از صفر تا ChatGPT جلد 2: سفر کامل ساخت چت‌بات هوش مصنوعی خودتان

In the last two decades, humanity has witnessed a digital transformation that transcends imagination. Computers have evolved from simple calculators to intelligent systems capable of understanding human language, emotions, and context. Among these milestones, one of the most revolutionary breakthroughs is Conversational Artificial Intelligence (AI) — the art and science of enabling machines to talk, reason, and respond like humans. The roots of conversational AI can be traced back to the early 1960s, when Joseph Weizenbaum at MIT created ELIZA, a rule-based program that mimicked a psychotherapist. Though limited in its capability, ELIZA marked the dawn of human–machine dialogue. Over the years, technological evolution gave birth to ALICE, Siri, Cortana, Alexa, and Google Assistant — each more capable, contextual, and human-like than its predecessor. However, the true leap came with Transformer-based architectures introduced by Google in 2017. This innovation unlocked the potential of Large Language Models (LLMs), capable of understanding not just words, but relationships, context, and intent. With OpenAI’s GPT series, conversational AI entered a new era — an age where chatbots could write essays, solve equations, generate poetry, design code, and engage in philosophical discussions. Today, conversational AI is no longer a novelty — it is a necessity. From customer service and healthcare assistance to education, programming, and entertainment, chatbots have become integral parts of our digital ecosystem. They streamline workflows, bridge communication gaps, and extend human intelligence through machine augmentation. The rise of ChatGPT and similar models represents a paradigm shift — from interaction to collaboration. These systems are not just answering questions; they are thinking companions, learning assistants, and creative co-authors. They can summarize vast data, personalize responses, and even adapt to a user’s tone or style. The fusion of Machine Learning (ML), Natural Language Processing (NLP), and Deep Learning has made it possible to replicate aspects of human cognition in computational form. Yet, behind this innovation lies complexity — architectures, datasets, fine-tuning, ethical design, and vast infrastructure. This complexity inspired the need for this book. As a researcher and educator with more than eighteen years of experience in computer science, I have seen how rapidly AI technologies evolve — and how students, developers, and even professionals often find it difficult to keep pace. When the world talks about ChatGPT, Bard, Claude, or Gemini, most discussions remain surface-level: “It’s a chatbot that answers questions.” But what lies beneath these systems? How do they actually understand human intent, generate coherent text, and learn from feedback? How does one build such a system — from zero? This book was written to answer those questions — not as an abstract discussion, but as a complete, step-by-step journey. It is designed for those who not only want to use chatbots but also create, train, and deploy them with full technical understanding. The title — From Zero to ChatGPT — symbolizes exactly that journey: starting from fundamental principles and ending with advanced AI-driven architectures. The book does not merely teach how to code a chatbot; it reveals how to think like an AI engineer — how to integrate data, design NLP pipelines, train models, deploy them, and optimize performance in realworld settings.