What the Data for This Category Looks Like
Special steel investment research data mainly comes from public industry association reports, special steel manufacturer factory price ledgers, futures exchange special steel variety market data, patent documents, and procurement ledgers of downstream manufacturing enterprises. Update cycles vary significantly: factory prices update daily, industry supply and demand reports release quarterly, and patent documents add in real time. Document structures include fields such as grade, chemical composition, mechanical properties, production process parameters, and downstream application scenarios. Single industry research reports are relatively long. Single product parameter tables have a standardized structure, with each field corresponding to a clear physical unit.
What Constraints Do These Characteristics Impose on the "Knowledge Base Retrieval and Recall" Link
The multi-source, varied update cycles of special steel data require the retrieval link to support incremental indexing by update time. This prevents high-frequency updated factory price data from being overwritten by low-frequency updated industry reports. There is a large difference in document length. Recall weights for short parameter tables and long industry research reports must be set separately. This avoids short documents making up too small a share of recall results. Fields have clear physical units, so retrieval must support unit matching logic. This ensures users searching for specific parameters get results in the correct format. Most downstream application scenario documents are bound to specific grades. The recall link needs to establish an association index between grades and application scenarios. This improves accurate matching rates.
How to Set the Configurations
| Configuration Item | Suggested Value | Basis for This Setting |
|---|---|---|
Recall Count | Top 10-15 | Special steel data includes short parameter tables and long research reports. Too many recall results will lead to overly long context, while too few will fail to cover all relevant documents |
Similarity Threshold | 0.75-0.85 | Semantic similarity of special steel parameter documents is relatively high. A threshold that is too low will introduce irrelevant results, while a threshold that is too high will miss some matching professional documents |
Chunk Length | 800-1200 characters | Special steel industry research reports are relatively long. The chunk length adapts to the core paragraphs of a single report, while avoiding excessive splitting of parameter tables |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Parsing some large industry research reports takes a long time, so sufficient time must be reserved for text splitting and index construction |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Single special steel industry research reports may exceed the size of conventional documents, so the upload limit needs to be relaxed to support complete data import |
Reranked Return Count | Top 5 | In the special steel investment research scenario, users pay more attention to the most relevant core data. Returning a small number of highly accurate results after reranking is sufficient |
The parameter values given on this page are all conventional recommendations, used as a starting point for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require specific analysis, and it is recommended to test on your own samples before finalizing the settings.
Three Common Mistakes
- Phenomenon: A "No knowledge base selected" error is returned when calling the chat interface, but the knowledge base content can be recalled normally in the debug preview interface. Cause: The
kbIdsparameter is not carried correctly when calling the interface, or the parameter format does not meet the interface requirements, causing the system to fail to identify the bound knowledge base. - Phenomenon: When importing a knowledge base via a web link, the returned content is empty or a prompt indicates that the target page cannot be accessed. Cause: The target link requires login permissions, and no crawler proxy or login state transfer parameters are configured, causing the system to fail to crawl protected page content.
- Phenomenon: Only long industry research reports are returned in the retrieval results, and no special steel product parameter tables are included. Cause: The
Chunk Lengthsetting is too small. After the parameter table is split into multiple chunks, the semantic matching weight is dispersed, causing short documents to fail to enter the recall results.
How to Confirm the Configuration Is Correct
- Upload a special steel product parameter table and an industry research report, trigger text parsing, confirm that the parsing task has no timeout errors, and that the documents have been successfully stored in the knowledge base.
- Initiate a retrieval request, enter special steel grade and mechanical property keywords, check whether the recall results include documents with corresponding fields, and adjust parameters until the results meet expectations.
- Call the chat interface with the correct knowledge base identification parameters, confirm that the returned results include content retrieved from the knowledge base, and there are no errors such as "No knowledge base selected".
- Import a web link of a special steel industry report that requires login permissions, confirm that after the crawling task is completed, the parsed content of the corresponding page has been generated in the knowledge base.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.