The article examines why pure vector retrieval in RAG lacks lexical precision and traceable relevance scores, explains BM25's strengths, and presents hybrid retrieval architectures—including RRF and linear combination fusion—as well as the trade‑offs of externalizing the fusion process.
The article analyzes how BM25 excels at exact token matching while vector embeddings capture semantic intent, explains their distinct failure modes, and shows that a hybrid retriever—combined with metadata filtering, proper chunking, and reciprocal rank fusion—delivers the most reliable results for RAG pipelines.
The article surveys recent LLM‑based agent memory research, presenting a unified framework that breaks memory systems into four components, detailing their design choices, experimental evaluation on LOCOMO and LONGMEMEVAL, key findings, and a new low‑token SOTA architecture.
TrendRadar, an open‑source Python project with over 54,000 GitHub stars, combines multi‑platform aggregation, large‑model AI filtering, sentiment analysis, and multi‑channel push to deliver a private, Docker‑deployable information radar that lets users define keywords and receive concise, translated summaries in seconds.
The article explains how TF‑IDF and BM25 compute term importance, compares their strengths and weaknesses, and shows how these sparse retrieval methods integrate with dense retrieval techniques such as DPR, SPLADE, and ColBERT in Retrieval‑Augmented Generation systems, concluding with a hybrid retrieval decision matrix.
The open‑source /last30days AI skill aggregates and analyzes recent hot content from Reddit, X, YouTube, Hacker News, Bluesky, Polymarket, Instagram Reels and TikTok, applying a multi‑signal quality ranking and data‑driven narrative to deliver structured, citation‑rich briefings that can be integrated into Claude Code or other workflows.
This article examines the critical role of chunk splitting in Retrieval‑Augmented Generation systems, comparing three generations of methods—from fixed‑size token cuts to sentence‑aware and semantic‑aware strategies—showing how refined chunking, overlap tuning, and metadata design raise Recall@5 from 0.67 to 0.91 while addressing table, list, and long‑section challenges.
This article explains why combining BM25 with dense vector search using Reciprocal Rank Fusion (RRF) improves recall for both exact‑term and semantic queries in a financial‑insurance document corpus, details the underlying algorithms, parameter choices such as k=60, provides Python implementations, and shows measurable performance gains in production.
Brands are increasingly paying to embed favorable content on platforms like Zhihu and Xiaohongshu, a practice dubbed Generative Engine Optimization (GEO), which manipulates the information AI retrieves, making many AI-generated product recommendations subtly biased without any disclosure.
The paper introduces xMemory, a hierarchical "split‑aggregate‑retrieve" framework that reduces token usage by up to 30% and improves QA performance by more than 10 points in long‑range agent conversations, outperforming traditional RAG across multiple LLMs.
This article examines Deep Research, an AI system that adds autonomous planning and deep reasoning to large language models, enabling them to browse the web, perform long‑chain reasoning, and generate professional, citation‑rich reports for complex tasks such as industry trend analysis and technical competitive research.
This article explains the background, core features, underlying ReAct‑based architecture, and engineering solutions of Deep Research—a system that equips large language models with autonomous planning, long‑chain reasoning, and professional report generation to tackle complex information‑intensive tasks.
The article explains why traditional retrieval‑augmented generation fails in multi‑hop scenarios due to overly large chunks, introduces SentGraph’s sentence‑level graph that trims retrieval units and encodes logical relations, details offline construction and online inference steps, and shows experimental gains and remaining limitations.
This article explains how different chunking methods—fixed size, semantic, recursive, document‑based, agent‑driven, sentence‑level, and paragraph‑level—affect Retrieval‑Augmented Generation, offering practical guidelines, metrics, and optimization tips for real‑world deployments.
This article explains the limitations of basic Retrieval‑Augmented Generation (RAG), introduces Rerank technology as a two‑step refinement process, compares dual‑encoder and cross‑encoder methods, and reviews popular Rerank models to help developers build more precise AI‑driven retrieval systems.
This article delves into the implementation details and optimization strategies of Retrieval‑Augmented Generation (RAG), covering document chunking, index enhancement, embedding, hybrid search, and re‑ranking, and provides practical code examples to help developers move from quick deployment to deep performance tuning.
This comprehensive article examines Retrieval‑Augmented Generation (RAG), covering its historical evolution, core theory, implementation variants, practical code examples, diverse applications, current controversies, and future research directions within the AI and NLP landscape.
COBRA, Baidu’s new generative retrieval framework, unifies sparse ID generation and dense vector encoding through a cascaded architecture that first predicts hierarchical IDs then refines them into dense representations, achieving state‑of‑the‑art recall, NDCG and conversion gains across public benchmarks and large‑scale advertising production.
This guide explains how to leverage AI tools with deep web‑search capabilities, covering site‑specific queries, wildcard operators, date ranges, Boolean logic, and effective prompt engineering techniques—including Socratic questioning and CRISPE framework—to improve information retrieval accuracy and efficiency across various domains.
Retrieval‑augmented generation (RAG) combines external knowledge retrieval with large language models to improve answer accuracy, but it often suffers from retrieval mismatches, algorithmic flaws, chunking issues, embedding biases, inefficiencies, generation errors, reasoning limits, formatting problems, system‑level failures, and high resource costs, which this article analyzes and offers solutions for.
This survey reviews the evolution of semantic embedding—from Word2vec and GloVe to BERT, Sentence‑BERT, and recent contrastive methods—then examines how large language models improve embeddings via synthetic data generation and backbone architectures, detailing techniques such as contrastive prompting, in‑context learning, knowledge distillation, and discussing resource, privacy, and interpretability challenges.
Tech Insight presents concise overviews of ten JD retail technology papers accepted at top AI conferences in 2024, covering topics such as open‑vocabulary object detection, multi‑scenario ranking, diversity‑aware re‑ranking, a diversified product search dataset, semi‑supervised query classification, plug‑in CTR models, and methods to mitigate LLM hallucinations.
Faced with billions of legal documents and the shortcomings of keyword search, Chinese legal professionals are turning to the AI‑powered YuanDian WenDa engine, which leverages Baidu's Wenxin model, a structured legal database, and prompt‑engineering to deliver trustworthy, citation‑rich answers and rapid research reports.
Tech Insight highlights ten 2024 JD Retail Technology AI papers presented at top conferences—including CVPR, SIGIR, WWW, AAAI and IJCAI—that advance open‑vocabulary object detection, unified search‑recommendation, pre‑ranking consistency, diversity‑aware re‑ranking, a diversified product‑search dataset, graph‑based query classification, plug‑in CTR models, parallel ad‑ranking, trajectory‑based CTR stability, and task‑aware decoding for large language models.
This article examines RAG Fusion, a retrieval‑augmented generation technique that combines multi‑query generation, reciprocal rank fusion, and contextual relevance improvements to boost search accuracy, discusses its workflow, mathematical foundation, advantages, challenges, real‑world applications, and emerging research directions.
The article reviews the STAR framework, a training‑free recommendation approach that leverages large language model embeddings and collaborative co‑occurrence scores to retrieve and rank items, and evaluates its performance, hyper‑parameter effects, and ablation studies against existing LLM‑based recommender methods.
This article shares a half‑year of hands‑on experience with Retrieval‑Augmented Generation, analyzing why simple RAG setups often feel unintelligent, identifying three core knowledge issues, and presenting concrete optimization strategies—including chunking, knowledge expansion, and tag‑based conflict resolution—to improve retrieval and generation performance in low‑resource environments.
ChatDBA is a conversational AI system built by Shanghai Aikesheng that employs large language models and Retrieval‑Augmented Generation to help database administrators diagnose faults, learn domain knowledge, and generate or optimize SQL, with a redesigned architecture that addresses early‑stage shortcomings and outlines future enhancements.
This article reviews the ACL 2024 paper that investigates how large language model‑generated text influences retrieval‑augmented generation pipelines, revealing short‑term retrieval gains but a long‑term “spiral of silence” that marginalizes human‑generated content and homogenizes open‑domain QA results.
The award‑winning study shows that dense retrieval performance follows precise power‑law scaling with model size, training data quantity, and annotation quality, introduces contrast entropy for evaluation, validates joint scaling formulas on MS MARCO and T2Ranking, and uses cost models to guide budget‑optimal resource allocation.
The article highlights three Meituan research papers accepted at SIGIR 2024—covering deep automated mechanism design for ad auction, a retrieval‑enhanced vertical federated recommendation framework, and disentangled contrastive hypergraph learning for next POI recommendation—and announces an online sharing event where the authors will present their work.
The paper introduces Generative Dense Retrieval (GDR), a two‑stage retrieval framework that first maps queries to memory‑efficient document‑cluster identifiers and then uses dense vectors to locate individual documents, achieving higher recall and better scalability than traditional generative retrieval while incurring modest latency and capacity trade‑offs.
Senior algorithm engineer Qi Jianwei from Xiaomi presents a comprehensive overview of building a large‑model‑centric Agent framework for voice assistants, covering prompt design, information retrieval, RAG processes, and future optimization directions to enhance performance and stability.
While both vectorization and hashing are essential for handling large datasets, this article examines whether vector embeddings can match the deterministic consistency of hash functions, comparing their collision handling, data structure design implications, and suitability for retrieval and machine‑learning tasks.
Vector retrieval, based on converting data into high‑dimensional vectors and measuring similarity, enables fast, accurate search across massive datasets, supporting AI tasks such as search engines, recommendation, NLP, and computer vision, and plays a crucial role in large‑model training for data selection, anomaly detection, and model optimization.
This article explains the fundamentals of information retrieval and search engine optimization and provides practical PHP code examples for keyword search, full‑text search, and common SEO techniques such as keyword, internal, and external link optimization.
This article explains the fundamental concepts of search engine technology—including forward and inverted indexes, tokenizers, stop words, synonym handling, ranking algorithms, and NLP integration—and provides a concise Go implementation with code examples and performance testing.
This article explains the fundamentals of information retrieval and search engine optimization, demonstrating how to implement keyword and full‑text search using PHP and MySQL, and presenting practical PHP techniques for keyword, internal, and external link optimization to improve website visibility.
This article provides a concise overview of recommendation systems, covering their definition, core framework of recall, ranking, and re‑ranking, various recall strategies including multi‑path and vector‑based methods, similarity calculations, and practical implementation details such as AB testing and code examples.
This article examines ChatGPT's limitations in real‑time information and answer accuracy, then proposes a retrieval‑augmented method that combines up‑to‑date document search with large language models to deliver more reliable and current responses across various scenarios.
This article explains what embeddings and vector databases are, how they are generated with models like OpenAI's Ada, why they enable semantic search and help overcome large language model token limits, and demonstrates a practical workflow for retrieving relevant document chunks using cosine similarity.
The article examines ChatGPT's limitations in timeliness and factual accuracy, especially for security‑related queries, and proposes a method that combines external document search with the model to deliver up‑to‑date, reliable answers across intelligent‑assistant scenarios.
The article surveys recent academic advances in both sparse inverted‑index and dense semantic retrieval for large‑scale search, highlighting key papers on decision frameworks, benchmarks, sparse lexical models, dual encoders, and hybrid techniques, while discussing challenges such as single‑vector limits and proposing multi‑view and hybrid solutions.
This article presents the QQ Browser search relevance team's experience integrating QQ Browser and Sogou search systems, detailing business overview, relevance system evolution, algorithm architecture, evaluation metrics, deep semantic matching, relevance calibration, and model distillation techniques to improve search relevance performance.
The QQ Browser search relevance team describes a unified, billion‑scale architecture that combines a main and vertical subsystem, a pyramid‑shaped ranking pipeline (recall, coarse, fine), a dedicated GPU‑accelerated relevance service, and hybrid semantic‑matching models (dual‑tower, BERT, matrix fusion) evaluated with offline and online metrics to deliver accurate, fresh, and authoritative results for diverse content and long‑tail queries.
This article presents eleven practical Google search tricks—including keyword matching, exact phrases, site‑specific queries, file‑type filters, and time ranges—to help programmers and other users retrieve relevant information more efficiently and improve overall productivity.
Discover eleven practical Google search techniques—from using spaces, vertical bars, and quotes to applying wildcards, site filters, filetype limits, and time ranges—that help programmers and anyone else locate precise information quickly and efficiently.
The paper introduces a graph‑based weakly supervised contrastive learning framework that uses heterogeneous user‑behavior graphs, e‑commerce‑specific augmentations, and a hybrid fine‑tuning/transfer learning strategy to improve semantic relevance matching between queries and product titles, achieving significant gains on a large‑scale Taobao dataset.
This article provides an overview of search, recommendation, and advertising as core internet services, comparing their problem definitions, business goals, algorithmic models, and system architectures across web, e‑commerce, and O2O scenarios, while outlining historical development and key industry examples.
The article highlights ten representative Meituan technical papers accepted at ACM SIGIR 2022, spanning personalized opinion tagging, cross‑domain sentiment classification, dialogue summarization transfer, universal retrieval, CTR prediction, image behavior modeling, and topic segmentation, each summarized with abstracts and download links for researchers.
This article explains how modern video platforms combine traditional keyword retrieval with deep‑learning‑based vector retrieval, detailing model architectures, attention mechanisms, personalization features, offline experiments, and online A/B results that show significant improvements in recall, relevance, and user experience.
This article examines Hulu's video search engine, highlighting challenges such as ensuring relevance beyond text matching, handling ultra‑short queries on TV remotes, addressing content gaps, and integrating AI‑driven query understanding, retrieval, and ranking to improve user experience.
Alibaba’s research team had five papers accepted at the prestigious SIGIR 2022 conference in Madrid, covering innovations such as joint ad‑ranking and creative selection, personalized bundle generation, calibrated neural predictions, disentangled counterfactual regression, and cold‑start user recommendation, showcasing strong expertise in information retrieval and online advertising.
This article provides a comprehensive overview of entity linking, detailing its definition, the two-stage pipeline of entity recognition and disambiguation, common methodologies such as candidate generation and ranking, advanced approaches, challenges like unlinkable mentions, and various applications in knowledge graphs, text mining, and question answering.
This comprehensive review by Dr. Fan Yixing surveys how pretrained language models have transformed first‑stage information retrieval, tracing the shift from traditional term‑based methods to neural sparse, dense, and hybrid approaches, and discussing key challenges such as hard‑negative mining, joint indexing‑representation learning, and generative‑discriminative training.
This article introduces knowledge graphs, defining them as semantic networks or multi‑relational graphs, explains entities and relations, compares RDF and graph‑database storage, outlines construction steps including entity extraction and ontology building, reviews embedding models like TransE/H/R/D, and explores applications in search, finance, recommendation, and language models.
This article presents the architecture, techniques, and practical solutions behind intelligent question answering in QQ Browser's search engine, covering knowledge‑graph based QA (KBQA), machine‑reading‑comprehension QA (DeepQA), and information‑retrieval QA (IRQA), and discusses system design, model optimization, and future directions.
This article explains how large‑scale UGC data is used to build a multi‑type interest point graph, describes the mining, hierarchical and associative relationship extraction methods, and demonstrates how the graph improves content understanding and recommendation accuracy while mitigating filter‑bubble effects.
The article explains why traditional text‑based search engines like ElasticSearch struggle with modern multimodal data, introduces vector databases that store implicit semantic embeddings, and proposes a generalized search architecture that decouples data‑to‑vector mapping from the engine while leveraging clustering or graph indexes for similarity search.
At iQIYI’s iTech Conference, Zhang Zhigang detailed a full‑stack search ranking system that combines NLP‑driven query analysis, hierarchical indexing, multi‑stage coarse‑to‑fine ranking, Transformer‑based re‑ranking, sparse‑feature DNN enhancements and LIME/SE‑Block explainability, delivering measurable gains in CTR and NDCG for the platform’s video search.
This article breaks down the evolving problem space of search and walks through its five core stages—request acquisition, parsing, matching, ranking, and result presentation—offering practical design decisions and best‑practice tips to create more effective search experiences.
This article explains the purpose, dimensions, and specific quantitative metrics—such as accuracy, surprise, diversity, RMSE, MAE, R‑squared, MAP, MRR, ROC and AUC—used to evaluate recommendation systems, covering user, platform, item, and system perspectives for practical AI deployments.
This article presents a comprehensive overview of 58 Search's multi‑stage retrieval system, compares term‑match and semantic matching, details the design, training, and optimization of interactive, dual‑tower, and semi‑interactive BERT‑based semantic models, and discusses their practical deployment in ranking and recall stages.
This article reviews current query expansion methods, contrasting relevance‑based models that rely on terms or entities with generative models that encode whole queries, discusses challenges of handling long and complex queries, and surveys recent research on encoding queries, session modeling, and multi‑task feature integration.
The article surveys core search‑engine technology—document hierarchy, flat and vertical inverted indexes, query operators for building and merging score lists, and ranking models from Boolean and BM25 to language‑model approaches like Indri—providing a foundational overview of information retrieval.
The presentation by Alibaba Entertainment's senior algorithm expert details the challenges of video search in the 4G/5G era and describes a comprehensive framework covering business overview, relevance and ranking, multimodal retrieval, deep semantic modeling, dataset construction, and practical deployment techniques.
This article explores the evolution of e‑commerce search, detailing why search matters, the technical pipeline—including query preprocessing, entity and intent recognition, knowledge‑graph construction, recall, coarse and fine ranking—and demonstrates substantial performance gains through real‑world case studies.
This article provides a comprehensive overview of general search engines, covering their classification, core workflow, key modules such as web crawlers, content processing, storage, user query handling, ranking strategies like TF‑IDF and PageRank, as well as anti‑cheat measures and user intent understanding.
This article reviews the challenges of short‑text query understanding in medical search and surveys a range of term‑weighting methods—including statistical models, supervised weighting, knowledge‑graph‑enhanced extraction, and neural network‑based approaches—highlighting their assumptions, implementations, and practical considerations for improving retrieval relevance.
Meituan’s Search Ads team placed third in the KDD Cup 2020 Multimodalities Recall track by tackling training‑test distribution mismatch with diversified negative sampling and distillation learning, and improving text‑image matching via gated fully‑connected layers, bidirectional attention, and diversified fusion, then ensembling neural and tree models for strong NDCG gains later applied to their ad creative‑selection system.
This article presents Tencent's research on hotspot mining and event extraction for information flow, detailing the challenges of timeliness, comprehensiveness, and heat rationality, the combined use of time‑series analysis, topic detection, clustering, and dynamic‑time‑warping, and the resulting framework and its applications to text, image, and video recommendation.
This article explains the motivations, requirements, and technical design of the DaJia app's search system, compares relational databases with Lucene‑based solutions, describes the inverted index mechanism, outlines common search workflows, and details the system's three iterative development phases and future improvement plans.
This article details the end‑to‑end process of extracting and leveraging tags for used‑car listings, covering data collection, segmentation, NLP‑based tokenization, word‑vector generation, tag‑library construction, and online retrieval flow to improve personalized recall and CTR.
This article explains the core components of a search engine—document processing, query processing, and matching—detailing each step from indexing to ranking, and discusses the document features that influence relevance, providing a comprehensive overview of information retrieval fundamentals.
This article explains the concept of timeliness in search ranking, defines content and demand side metrics such as half‑life and time sensitivity, describes evaluation criteria, outlines feature extraction and labeling pipelines, and details the multi‑stage modeling, recall, and indexing strategies used to improve timely search results.
This article explains the core components and processing steps of a search engine—document processor, query processor, indexing, and matching—detailing how documents are normalized, tokenized, filtered, weighted, and stored in an inverted index to support effective information retrieval.
Alibaba’s Youku video search platform combines six-layer architecture—data extraction, technology integration, recall, relevance, ranking, and intent understanding—leveraging CV, NLP, knowledge graphs, and multi‑modal cues such as face, OCR, and audio recognition to overcome title‑mismatch, entity, and semantic challenges and deliver precise, diverse video retrieval.
This article reviews the factors influencing search results, explains why query expansion is crucial for improving recall, surveys various sources of expansion terms, describes probabilistic and translation‑based models, and offers practical recommendations for building effective, data‑driven query expansion pipelines.
The AIS 2020 Conference, co‑hosted by the Beijing Academy of Artificial Intelligence and Meituan, showcased 74 top ACL, IJCAI and SIGIR papers across 15 sessions on NLP, AI and IR topics, streamed free online on May 23‑24 2020 with keynote speakers from leading Chinese universities.
This article introduces the background of search relevance, reviews three common matching model types—representation‑based, interaction‑based, and hybrid—describes their architectures such as DSSM, CDSSM, DRMM and DUET, and presents experimental results of these models on DiDi Food’s search system.
The article outlines DiDi Food’s search relevance challenge, defines semantic matching versus traditional keyword methods, describes the recall‑ranking pipeline, and reviews three families of deep matching models—representation‑based (e.g., DSSM), interaction‑based (e.g., DRMM) and hybrid (e.g., DUET)—including experimental results and a recruitment notice.
Query understanding (QU) involves lexical, syntactic, and semantic analysis of user queries to enable effective search recall and ranking, covering modules such as preprocessing, correction, expansion, segmentation, intent detection, term importance, and guidance, with detailed discussion of algorithms, models, and system architecture.
Meituan’s Search & NLP team, together with two universities, won the WSDM Cup 2020 Citation Intent Recognition task by building a multimodal retrieval‑ranking pipeline that merges semantic, spatial and axiomatic recall models with pairwise BERT and LightGBM ranking, achieving the highest MAP@3 and now powering Meituan’s QA, FAQ and core search systems.
The live session presented Alibaba Entertainment’s senior algorithm expert discussing Youku’s video search business, relevance and ranking models, multimodal search challenges, and practical AI techniques, offering attendees a comprehensive view of modern video retrieval systems and their implementation.
This article explains what an inverted index is, why it’s essential for full‑text search, how it is built and queried, and common token transformations such as stop‑word removal, lemmatization, and stemming.
This article surveys recent advances in recommendation system technology, covering the evolution from a two‑stage recall‑ranking pipeline to a four‑stage architecture, and detailing emerging trends in model‑based recall, user‑behavior sequence modeling, knowledge‑graph integration, graph neural networks, advanced ranking models, multi‑objective optimization, multimodal fusion, and listwise re‑ranking.
This article explains how 360 Search handles billions of daily crawls and hundred‑billion‑scale indexing by describing its overall architecture, core modules such as offline indexing and online retrieval, query analysis, relevance scoring, and the engineering techniques that enable efficient large‑scale web search.
In an interview, Gitee’s chief architect Chen Xin explains why Elasticsearch was chosen for code search, outlines how combining search with NLP can both aid semantic understanding and enrich repository queries, and shares his views on the platform’s fast‑evolving ecosystem and upcoming community meetup.
This talk presents how Meituan leverages knowledge‑graph QA (KBQA) across restricted and complex smart‑interaction scenarios, compares semantic‑parsing and information‑retrieval approaches, introduces three‑layer concept nodes to handle entity explosion and non‑connected queries, and outlines architectural refinements for multi‑turn dialogue integration.
This article presents a comprehensive solution to a competition that requires matching description paragraphs with the three most relevant papers from a 200,000‑paper corpus, detailing background, task definition, evaluation metrics, modeling strategy, and core algorithms such as SIF, InferSent, Bi‑LSTM, and BERT.
This article reviews Baidu's research on semantic computing, covering the evolution of semantic representation, the development and evaluation of the ERNIE and SimNet models, their industrial applications, model compression techniques, and outlines future research priorities in multilingual and multimodal semantic understanding.
Alibaba’s AI team introduced a multi‑stage, document‑ranking and paragraph‑ranking system built on an Enriched BERT model that topped the MS MARCO reading‑comprehension leaderboard, surpassing previous state‑of‑the‑art methods and even human performance on open‑domain QA tasks.
At SIGIR 2019 in Paris, Alipay presented two AI research papers—one applying reinforcement learning to predict user intent in customer‑service bots and another introducing the unsupervised QUEST method that builds noisy quasi‑knowledge graphs for answering complex multi‑document questions.
The article presents a technical overview of Chatopera’s multi‑turn dialogue platform, covering language model fundamentals, Chinese segmentation, word embeddings, information retrieval, and open‑source tools, while illustrating how these AI techniques enable low‑cost, scalable enterprise chatbot solutions.
Archie, created in 1989 by Peter Deutsch at McGill University, was the first internet search tool that indexed FTP sites, while WAIS, developed by Brewster Kahle at Thinking Machines, extended searchable databases worldwide, both highlighting early challenges in managing large communication traffic and user-friendly interfaces.
This article explains the fundamentals of full‑text search, describing how Lucene builds and uses inverted indexes, the steps of tokenization, linguistic processing, term weighting, and relevance scoring, and illustrates these concepts with examples, tables, and diagrams.
This article explains the core of search engine technology by describing what an inverted index is, how it is built using single‑pass memory and multi‑way merge methods, how indexes can be partitioned and incrementally updated, and how Hadoop can be used for large‑scale indexing.
This article explains the principles, algorithms, and practical challenges of search autocomplete (query suggestion), covering popularity‑based models, time‑sensitive methods, user‑aware and context‑aware approaches, data pipelines, indexing, ranking, personalization, and evaluation techniques used in e‑commerce search systems.
This article explains how modern search engines identify precise and broad user intents, examines real‑world query examples, and details extension modules such as synonym, pinyin, and correction that enhance query understanding using algorithms like Aho‑Corasick, Hidden Markov Models, and Levenshtein distance.
This article summarizes two SIGIR 2017 papers: one introduces a probabilistic latent‑class model for shopping‑pair push recommendations that improves e‑commerce click‑through rates by leveraging co‑purchase and view‑then‑purchase graphs, and the other presents IRGAN, a GAN‑based framework that unifies generative and discriminative information‑retrieval models, achieving state‑of‑the‑art results across web search, recommendation, and QA tasks.
