What the data for this category looks like
Data for this category comes from engineering orders, sand, gravel, cement admixture test reports, aggregate moisture content measurement data, mixing plant production control system logs, and laboratory test records. Daily documents include mix proportion notices, opening identifications, production and delivery slips, raw material test records, specimen molding records, and strength reports. Mix proportion notices note cementitious materials, aggregates, and water consumption (unit: kilograms per cubic meter). Opening identifications record mixing duration (unit: seconds). Specimen records note molding date and curing conditions. Strength reports note age and compressive strength (unit: megapascals). Data update frequency follows per vehicle production task, per batch of incoming raw materials, and daily laboratory tests.
Constraints Imposed on Vector Models and Indexes by These Data Characteristics
The data characteristics of this category impose multiple constraints on the vector models and indexes workflow. Frequently updated production and test data requires indexes to support incremental synchronization logic, to avoid processing delays caused by full reindexing. Multi-source, dispersed data formats require indexes to support documents with different structures, such as production control system logs, laboratory test records, and engineering orders. Structured fields with specific units require vector models to adapt to the semantics of value and unit combinations, to avoid deviations caused by plain text processing. Cross-document association retrieval requirements require indexes to support linked matching of mix proportions, test records, and specimen data, while also limiting the return range of single-batch retrieval to avoid exceeding the configured capacity of defaultToken.
How to Set the Configuration
This configuration is based on FastGPT v4.17.0
| Configuration Item | Recommended Range | Rationale |
|---|---|---|
| Chunk Length | 800–1200 characters | Adapts to long texts such as mix proportions and specimen records for this category, covers complete semantic units, and avoids semantic fragmentation |
| Overlap Length | 100–150 characters | Maintains contextual association for short documents such as production and delivery slips, and avoids truncation of key information during chunking |
defaultToken | 4096 | Adapts to the requirement of retrieving and associating multiple documents in a single batch, ensuring complete semantics of spliced text |
maxToken | 8192 | Covers the maximum capacity requirement for integrating multiple test records and production data when drafting exception reports |
| Similarity Threshold | 0.75–0.85 | Accurately matches mix proportions and test data, and avoids interference from irrelevant data with low matching degrees |
| Single Search Limit | Top 6 entries | Only returns core associated data, reducing the burden of context processing |
Three Common Mistakes
- Phenomenon: After customizing the index configuration, the retrieval result has no matching content, with 0 results returned. Cause: The chunking rules are not set according to the document field structure of this category, causing the chunked text to fail to match retrieval semantics.
- Phenomenon: After accessing a Tencent Hunyuan vector model, the call returns an authentication error. Cause: Interface parameters are not configured according to the model requirements, and the field format of this category's data is not adapted.
- Phenomenon: After accessing an external vector database, real-time production data cannot be synchronized. Cause: The high-frequency update rhythm of per-vehicle production tasks and per-batch raw materials is not adapted, and the incremental synchronization logic does not match the actual update frequency, resulting in data lag.
How to Confirm the Configuration Is Correct
- Upload a single mix proportion notice and its corresponding production and delivery slip, initiate a retrieval, and check whether the returned results include the associated raw material test records.
- View the index synchronization records to confirm whether the index completes incremental updates after each vehicle production task and each batch of incoming raw materials.
- Adjust the similarity threshold to verify whether the matching degree of retrieval results adapts to the requirements of drafting process documents and exception reports.
- Test the configurations of
defaultTokenandmaxTokento confirm that the retrieved content after splicing multiple associated documents is not truncated.
The values provided are common starting points and should be measured against the reader's own samples.