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Published bySharon Worsham Modified over 8 years ago
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D3 A6 P3 A3 A5 P2 D1 P1 A1 A2 D4 A4 D2
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Ski Lift Pickup Point Ski Run IntersectionSki Lift Drop Off Point
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Ski Lift Pickup Point Ski Run IntersectionSki Lift Drop Off Point Max ΣDistance ij * Y ij
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Slope Classification ij ≤ Skier Ability
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Y ij * (ΣSki Time ij + ΣLift Time ij ) ≤ Allowable Time Ski Time = Distance * (60 / Skier Speed)
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Max ΣDistance ij * Y ij Y ij * (ΣSki Time ij + ΣLift Time ij ) ≤ Allowable Time Slope Classification ij ≤ Skier Ability Σ Y ij ≤ Capacity ij Flow In = Flow Out
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Attacks
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Attack Mitigation
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Operator / Attacker Paths that determine the best MOE calculated Attacks can only occur on the original path Operator must determine the best locations to mitigate the attacks
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Ski Lift Pickup Point Ski Run IntersectionSki Lift Drop Off Point
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Beginner Optimal Route 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5
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1 2 2 3 3 3 4 4 4 4 5 5 5 5 5 Intermediate Optimal Route
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1 2 23 3 3 4 4 4 4 5 5 5 5 5 Advanced Optimal Route
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Analysis Summary Problem Scoped to Only Most-Used Paths Large Impact on MOE With Small Amount of Mitigating Equipment
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Limitations Would Like Higher Granularity of Routes Mitigation of Attacks Are Done Manually Fixed Speed Values of Skier Limits Reality Add Recovery Time & Change Allowable Times
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Primal Dual Dual Variables Max Σ( d(I,j) * Y(I,j) ) Min Σ( π(ji,j)*cap(I,j) + Tot_Time*θ(i)) ΣY(I,j) – ΣY(j,i) = 0 ρ(j) ρ(j) – ρ(i) + π(I,j) + Σθ(i)*t(I,j) ≥ d(I,j) Y(I,j) ≤ cap(I,j) for all (I,j) π(I,j) π(I,j) ≥ 0 Σ( Y(I,j) * t(I,j) ) ≤ Tot_Time θ(i) θ(i) ≥ 0 Y(I,j) ≥ 0 ρ is unrestricted
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