Liu yang's paper

1. Optimization method of on-line opening and controlling length of oil pipeline, acta petrolei sinica, No.4, 21

2. Optimization calculation of oil and gas gathering and transportation system planning scheme, oil and gas storage and transportation, 22 (21) 4

3. Calculation method of on-line opening and controlling stress of buried long-distance pipeline, petroleum engineering construction, No.1, 22

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