What the data for this category looks like
Coal chemical industry research report data sources include industry association public reports, securities firm industry analysis documents, public annual reports of coal chemical enterprises, and professional journals. Update cadence follows layered schedules: Industry dynamic documents are updated weekly. Reports on enterprise production capacity and process parameters are updated monthly or quarterly. Policy documents are released immediately per regulatory requirements. Document structures combine structured data and long-form text. They include fields such as plant production capacity, unit energy consumption, and product price. Production capacity is measured in tons per year. Energy consumption is measured in kilograms of standard coal per ton of product. Additional metadata fields include publishing organization and release date.
Constraints imposed on deployment and upgrade
The multi-source data nature of coal chemical research reports requires configuring multiple data source index adaptations during deployment. This avoids content limitations from a single data source. The document structure combining long text and structured tables increases parsing time and resource usage. Timeout and memory configurations need adjustment. Exclusive unit requirements for fields require retaining original field formats during deployment. This prevents professional information distortion from automatic conversion. The layered update cadence requires configuring differentiated incremental synchronization scheduling during the upgrade phase. It also requires distinguishing content timeliness from different sources during retrieval. This ensures the accuracy of returned results.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Single coal chemical research report contains long text and process charts, with parsing time longer than general documents |
UPLOAD_FILE_MAX_SIZE | 500 MB | Coal chemical research reports often include multi-page data tables and flow charts, resulting in large single-file size |
Chunk size | 1200–1500 characters | Retain contextual coherence of professional terms and long paragraphs, avoid splitting critical information |
Recall count | Top 6–8 entries | Balance retrieval comprehensiveness and context window load, adapt to narrow-range retrieval needs in professional fields |
Similarity threshold | 0.78–0.82 | Filter non-professional matching results, focus on accurate content in the coal chemical field |
Rerank result count | Top 3 entries | Highlight the core conclusions of the most relevant research reports, reduce user screening costs |
The parameter values provided on this page are common recommended starting points for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require targeted analysis. It is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- Phenomenon: After offline deployment, upload a locally saved coal chemical research report. The text extraction result is empty. Cause: OCR dependency packages are not configured in the offline environment. Process flow diagrams and data tables in the research report cannot be parsed.
- Phenomenon: A 403 status code appears when calling the non-login link after deployment. Cause: The
ALLOW_ANONYMOUS_ACCESSparameter is not set totrue, or the domain whitelist for non-login links is not permitted. - Phenomenon: No results appear occasionally when retrieving coal chemical research reports after configuring the retrieval engine. Cause: The regional parameter of the retrieval engine is not adjusted, or the exclusive API key is not configured. This triggers call frequency limits.
How to Confirm Configuration is Successful
- Upload a locally saved coal chemical research report. Check the
parse_statusfield in the parsing log. Confirm the status issuccessto verify parsing configuration takes effect. - Initiate a retrieval request for coal chemical professional terminology. Verify the number of returned results matches the configured
Recall countto confirm retrieval parameters take effect. - Test access to the non-login link. Confirm the page opens normally without login to verify anonymous access configuration takes effect.
- Manually adjust the
Similarity thresholdconfiguration. Initiate a retrieval request and observe changes in result matching degree to confirm parameters can be adjusted normally.
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.