| 1 | Introduction | .... 2 |
| 1.1 | PIM-F is a Distributed Computer System | .... 2 |
| 1.2 | Partial Copy Strategy is Adopted | .... 3 |
| 1.3 | PIM-F Adopts a Control-driven Mechanism As The Basic Execution Mechanism | .... 3 |
| 1.4 | PIM-F Adopts a Data-driven Mechanism As a Synchronization Mechanism for Concurrent Processes | .... 3 |
| 2 | PIM-F Computation Model | .... 5 |
| 2.1 | Non-Guard World | .... 5 |
| 2.2 | Guard World | .... 7 |
| 3 | PIM-F Architecture | .... 10 |
| 3.1 | Process Pool Unit(PPU) | .... 11 |
| 3.2 | Unification Unit(UU) | .... 17 |
| 3.3 | Structure Memory Unit(SMU) | .... 19 |
| 4 | Sample Program Execution | .... 19 |
| 4.1 | An Example of Prolog | .... 19 |
| 4.2 | An Example of Concurrent Prolog | .... 23 |
| 5 | Concluding Remarks | .... 25 |
| References | .... 26 | |
| End | .... 27 |
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