GB-UPS-CAL-001
UPS
3MW和1.5MW_UPS舱负载与压降计算.docx EN
P1
Migrate candidate
2026-10-02
Proposed filename
GB-UPS-CAL-001_P1_3MW和1.5MW UPS舱负载与压降计算_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/01 UPS for IT
Reason module and type guessed
Evidence keyword:folder:ups · keyword:name:计算
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 58.3 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 649c57d356180de04dfaacf5438a7058
GB-UPS-CAL-002
UPS
753722~1.PDF EN
P1
Migrate candidate
2026-09-20
Proposed filename
GB-UPS-CAL-002_P1_753722 1_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/04 Fire Protection/Design Calculations for Gas Fire Suppression System and Explosion Venting Panels/Explosion Venting Panel Calculation Sheet
Reason module and type guessed
Evidence keyword:folder:battery · keyword:folder:calculation
Confidence Low
Module Medium
· Type Low
Copies 1
Size 261.7 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 26976eb66758cdf70c507c6f32c2c032
GB-UPS-CAL-003
UPS
AIDC Lithium Battery Calculation -1500K EOL@5min_10 modules per cabinet.pdf EN
P1
Migrate candidate
2026-09-24
Proposed filename
GB-UPS-CAL-003_P1_AIDC Lithium Battery Calculation -1500K EOL@5min 10 modules_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/06 Critical Components/02 Battery/Calculation
Reason module and type guessed
Evidence keyword:folder:battery · keyword:name:calculation
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 41.5 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum a823d5a2e451b1d72d255de36ca9cd8c
GB-UPS-CAL-004
UPS
AIDC Lithium Battery Calculation -1500K EOL@5min_9 modules per cabinet.pdf EN
P1
Migrate candidate
2026-09-24
Proposed filename
GB-UPS-CAL-004_P1_AIDC Lithium Battery Calculation -1500K EOL@5min 9 modules p_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/06 Critical Components/02 Battery/Calculation
Reason module and type guessed
Evidence keyword:folder:battery · keyword:name:calculation
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 40.7 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum f2e3a405a948a74a3ae7bffa985402b9
GB-UPS-CAL-005
UPS
Battery Enclosure Calculation Sheet.pdf EN
P1
Migrate candidate
2026-09-24
Proposed filename
GB-UPS-CAL-005_P1_Battery Enclosure Calculation Sheet_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/04 Fire Protection/Gas Fire Suppression Calculation Sheet
Reason module and type guessed
Evidence keyword:folder:battery · keyword:name:calculation
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 365.5 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum a6b24df74813dd34cf38470dff7dc650
GB-UPS-CAL-006
UPS
Battery Level Calculation Table.xlsx EN
P1
Migrate candidate
2026-10-22
Proposed filename
GB-UPS-CAL-006_P1_Battery Level Calculation Table_EN.xlsx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/04 Fire Protection/Battery Capacity Calculation Sheet
Reason module and type guessed
Evidence keyword:folder:battery · keyword:name:calculation
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 12.5 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum eadecf60d899c8107a6d46056b0e3c67
GB-UPS-CAL-007
UPS
Electrical Enclosure Calculation Sheet.pdf EN
P1
Migrate candidate
2026-10-15
Proposed filename
GB-UPS-CAL-007_P1_Electrical Enclosure Calculation Sheet_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/04 Fire Protection/Gas Fire Suppression Calculation Sheet
Reason module and type guessed
Evidence keyword:folder:battery · keyword:name:calculation
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 333.1 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 387d7b366f853134de9420adce5072b7
GB-UPS-CAL-008
UPS
(26.8.21))GIGA Dehumidification calculation_EN.pdf EN
P1
Migrate candidate
2026-09-30
Proposed filename
GB-UPS-CAL-008_P1_( ))GIGA Dehumidification calculation_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/06 Critical Components/01 AC/Power Distribution Compartment/Dehumidifier/Calculation
Reason module and type guessed
Evidence keyword:folder:battery · keyword:name:calculation
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 133.4 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 7311a3c911e0eb7f8cdcf12d9877a87f
GB-UPS-CAL-009
UPS
UPS选型容量计算书20260826.docx EN
P1
Migrate candidate
2026-08-26
Proposed filename
GB-UPS-CAL-009_P1_UPS选型容量计算书_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CAL Calculation
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/01 UPS for IT
Reason module and type guessed
Evidence keyword:folder:ups · keyword:name:计算书
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 552.8 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 33a6c0426bc6aed36a3895d1255ab16b
GB-UPS-CFD-003
UPS
GIGA M-UPS E-house-Cooling Distribution Section CFD Thermal Analysis Report.docx EN
P1
Migrate candidate
2026-10-27
Proposed filename
GB-UPS-CFD-003_P1_GIGA M-UPS E-house-Cooling Distribution Section CFD Thermal_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/02 UPS for cooling/ Thermal Analysis Report
Reason module and type guessed
Evidence keyword:folder:ups · keyword:name:cfd
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 4.7 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 316da4161d4e631780c9228fe563f9c6
GB-UPS-CFD-004
UPS
GIGA M-UPS E-house-Cooling Distribution Section CFD Thermal Analysis Report.docx.pdf EN
P1
Migrate candidate
2026-10-27
Proposed filename
GB-UPS-CFD-004_P1_GIGA M-UPS E-house-Cooling Distribution Section CFD Thermal_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/02 UPS for cooling/ Thermal Analysis Report
Reason module and type guessed
Evidence keyword:folder:ups · keyword:name:cfd
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 4.0 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum cc7ed3c28c0d11bfcbdbcaaddd0a34d7
GB-UPS-CFD-005
UPS
GIGA U-01 UPS E-House-IT Battery Compartment CFD Thermal Analysis Report.pdf EN
P1
Migrate candidate
2026-08-25
Proposed filename
GB-UPS-CFD-005_P1_GIGA U-01 UPS E-House-IT Battery Compartment CFD Thermal Ana_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/01 UPS for IT/01 CFD Analysis Report
Reason module and type guessed
Evidence legacy_tag:name:U-01 · keyword:name:cfd
Confidence Medium
Module High
· Type Medium
Copies 1
Size 2.0 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 0ff77f4fdfba9f7a12bf3f2908f91a2d
GB-UPS-CFD-005
UPS
GIGA U-01 UPS E-House-IT Battery Compartment CFD Thermal Analysis Report.docx EN
P2
Migrate candidate
2026-08-26
Proposed filename
GB-UPS-CFD-005_P2_GIGA U-01 UPS E-House-IT Battery Compartment CFD Thermal Ana_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/01 UPS for IT/01 CFD Analysis Report
Reason module and type guessed
Evidence legacy_tag:name:U-01 · keyword:name:cfd
Confidence Medium
Module High
· Type Medium
Copies 1
Size 7.5 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum e1ab5523dde90288cc01b5a430d520fe
GB-UPS-CFD-006
UPS
(26.8.1)GIGA U-01 UPS E-house-IT Distribution Section CFD Thermal Analysis Report(1).pdf EN
P1
Migrate candidate
2026-08-01
Proposed filename
GB-UPS-CFD-006_P1_GIGA U-01 UPS E-house-IT Distribution Section CFD Thermal An_EN.pdf
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/00 Reference_UPS(Eaton)/UPS-Eaton
Reason module and type guessed
Evidence legacy_tag:name:U-01 · keyword:name:cfd
Confidence Medium
Module High
· Type Medium
Copies 1
Size 1.7 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 4e39299f15266fe259041c204d2db434
GB-UPS-CFD-006
UPS
(26.8.1)GIGA U-01 UPS E-house-IT Distribution Section CFD Thermal Analysis Report(1).docx EN
P2
Migrate candidate
2026-08-11
Proposed filename
GB-UPS-CFD-006_P2_GIGA U-01 UPS E-house-IT Distribution Section CFD Thermal An_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/00 Reference_UPS(Eaton)/UPS-Eaton
Reason module and type guessed
Evidence legacy_tag:name:U-01 · keyword:name:cfd
Confidence Medium
Module High
· Type Medium
Copies 1
Size 3.3 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 894400b0d7474feeb0fda9ce15264adb
GB-UPS-CFD-006
UPS
GIGA U-01 UPS E-house-IT Distribution Section CFD Thermal Analysis Report.docx EN
P3
Migrate candidate
2026-08-26
Proposed filename
GB-UPS-CFD-006_P3_GIGA U-01 UPS E-house-IT Distribution Section CFD Thermal An_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/13. UPS + Battery/01 Documentation/03 Technical Doc/01 UPS for IT/01 CFD Analysis Report
Reason module and type guessed
Evidence legacy_tag:name:U-01 · keyword:name:cfd
Confidence Medium
Module High
· Type Medium
Copies 1
Size 26.2 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum e9695011071c0037f9682efa08a9f13a
GB-UPS-CFD-021
UPS
06 27 Simulation Results.docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-021_P1_06 27 Simulation Results_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 1.3 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 54dca546bd409cb8906527d45869c697
GB-UPS-CFD-022
UPS
0717 underfloor air supply results (no baffle temperature field not optimized).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-022_P1_0717 underfloor air supply results no baffle temperature fie_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 1002.5 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 70f474dfe09a806bfce00ca03341b66e
GB-UPS-CFD-023
UPS
Preliminary simulation (Model 3) 07 02 (1).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-023_P1_Preliminary simulation Model 3 07 02_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 1.7 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum cc35d153d6b076a7df24c69cec1e6872
GB-UPS-CFD-024
UPS
Preliminary Simulation (Model 3) 07 03 (1).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-024_P1_Preliminary Simulation Model 3 07 03_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 1
Size 1.8 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum fc568aa996f63d1f6fd983bd747b34d9
GB-UPS-CFD-025
UPS
Preliminary simulation (UPS air outlet) 7.11 (1).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-025_P1_Preliminary simulation UPS air outlet 7.11_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 1.3 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 54124d695e2566e58c94b29219edeb16
GB-UPS-CFD-026
UPS
UPS Compartment Simulation Version 8 V8 (Bottom Supply Top Return Multi-Outlet 0719).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-026_P1_UPS Compartment Simulation Bottom Supply Top Return Multi-Ou_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 4.3 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum be1cbcf00578cb273cd8425c6fc24b46
GB-UPS-CFD-027
UPS
UPS Room Air Distribution Simulation 7.25.docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-027_P1_UPS Room Air Distribution Simulation 7.25_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 2.6 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 9715fb58f315a051b89c20870445e113
GB-UPS-CFD-028
UPS
UPS Room HVAC Simulation First Edition Conclusions Reference V1 (1).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-028_P1_UPS Room HVAC Simulation First Edition Conclusions Reference_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 2.2 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 9de7937d7da47182cf2de673810cd507
GB-UPS-CFD-029
UPS
UPS Room Simulation v11 6SIGMA (Down Supply Top Return Multi-Outlet Optimization 0723) Hot Standby Downtime.docx EN
P1
Migrate candidate
2026-07-26
Proposed filename
GB-UPS-CFD-029_P1_UPS Room Simulation 6SIGMA Down Supply Top Return Multi-Outl_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 1
Size 12.4 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum feebe95ca09135e55ae65f6b1be65081
GB-UPS-CFD-030
UPS
UPS Room Simulation Version 7 (Air Conditioning Down-Supply Top-Return 0715).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-030_P1_UPS Room Simulation Air Conditioning Down-Supply Top-Return_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 4.0 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 5b96a7bccf10718532f9a72295763433
GB-UPS-CFD-031
UPS
UPS Room Simulation Ninth Edition 6SIGMA (Down-Supply Top-Return Multi-Outlet 0722)(1).docx EN
P1
Migrate candidate
2026-07-25
Proposed filename
GB-UPS-CFD-031_P1_UPS Room Simulation Ninth Edition 6SIGMA Down-Supply Top-Ret_EN.docx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type CFD CFD analysis
Current location EN/14. CFD Simulation/(26.7.27)U-01 UPS e-House CFD Reports
Reason module and type guessed
Evidence legacy_tag:folder:U-01 · keyword:folder:cfd
Confidence Low
Module High
· Type Low
Copies 2
Size 10.9 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum ec2abb25514d2d4aa07593c4fb2f1044
GB-UPS-DFM-001
UPS
DQ_DFMEA-UPS ehouse Sample_2026.9.9.xlsx EN
P1
Migrate candidate
2026-09-09
Proposed filename
GB-UPS-DFM-001_P1_DQ DFMEA-UPS ehouse Sample_EN.xlsx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type DFM DFMEA
Current location EN/13. UPS + Battery/01 Documentation/05 Reliability/01 DFMEA & PDMEA/E-house
Reason module and type guessed
Evidence keyword:folder:e-house · keyword:name:dfmea
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 1.1 MB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum 98c2b5f7cffa70ed5205a0da9aad4b56
GB-UPS-PFM-001
UPS
DQ_PFMEA-UPS ehouse Sample_2026.9.9.xlsx EN
P1
Migrate candidate
2026-09-09
Proposed filename
GB-UPS-PFM-001_P1_DQ PFMEA-UPS ehouse Sample_EN.xlsx
Target location
01 Modules/UPS UPS e-house with battery/20 Analysis
Module UPS UPS e-house with battery
Type PFM PFMEA
Current location EN/13. UPS + Battery/01 Documentation/05 Reliability/01 DFMEA & PDMEA/E-house
Reason module and type guessed
Evidence keyword:folder:e-house · keyword:name:pfmea
Confidence Medium
Module Medium
· Type Medium
Copies 1
Size 56.4 KB
Author —
Reviewer —
CSI section —
Project sheet no. —
Checksum b99c3e20f4002dfa313b4d99b4be2c7f