EFFECTS OF SPRING MIGRATION DISTANCE ON TREE SWALLOW REPRODUCTIVE SUCCESS WITHIN AND AMONG FLYWAYS



A new type of anti-heave semi-submersible drilling platform

A new type of semi-submersible drilling platform is designed.The numerical simulation software is Card Upsell used to analyze the heave response of the new platform in the frequency domain and time domain, and the semi-submersible drilling platforms with double-floating four-column structure and heave plate structure are compared with the new platf

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