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Beating Competitive Ratio 4 for Graphic Matroid Secretary [PDF]
CoRROne of the classic problems in online decision-making is the *secretary problem* where to goal is to maximize the probability of choosing the largest number from a randomly ordered sequence. A natural extension allows selecting multiple values under a combinatorial constraint. Babaioff, Immorlica, Kempe, and Kleinberg (SODA'07, JACM'18) introduced the *
Kiarash Banihashem +5 more
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Competitive search ratio of graphs and polygons [PDF]
, 2004 We consider the problem of searching for a goal in an unknown environment, which may be a graph or a polygonal environment. The search ratio is the worst-case ratio before the goal is found while moving along some search path, over the shortest path from the start point to the goal, minimized over all search paths. We investigate the problem of finding
Fleischer, Rudolf +4 more
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Optimal Competitive-Ratio Control
CoRR, 2022 Inspired by competitive policy designs approaches in online learning, new control paradigms such as competitive-ratio and regret-optimal control have been recently proposed as alternatives to the classical $\mathcal{H}_2$ and $\mathcal{H}_\infty$ approaches.
Oron Sabag, Sahin Lale, Babak Hassibi
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Prophet Inequalities via the Expected Competitive Ratio
ACM Transactions on Economics and Computation, 2023 We consider prophet inequalities under general downward-closed constraints. In a prophet inequality problem, a decision-maker sees a series of online elements with values and needs to decide immediately and irrevocably whether or not to select each element upon its arrival, subject to an underlying feasibility constraint.
Tomer Ezra +4 more
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Agronomy, 2023 Corn (Zea mays L.)–soybean (Glycine max (L.) Merr.) intercropping is one of the main traditional intercropping systems used. We hypothesized that sweet corn–soybean intercropping with reduced nitrogen application could improve the crops’ fresh grain ...
Xia Yu +7 more
doaj +1 more source
Training Process Structure of Highly Skilled Players in Mini-Football during the Competitive Period [PDF]
Sport Mont, 2021 According to the competition calendar, a one-cycle training process for highly skilled mini-football players in the annual macrocycle was selected.
Wang Leibo +9 more
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Santa Rosalia Reconsidered: Size Ratios and Competition [PDF]
Evolution, 1981 Hutchinson's (1959) seminal paper, "Homage to Santa Rosalia or Why are there so many kinds of animals?" raised many issues that have subsequently dominated evolutionary ecology. One answer Hutchinson proposed to his question was that two species in the same trophic level can coexist if the ratio of sizes of their trophic apparati is sufficiently large,
Daniel, Simberloff, William, Boecklen
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Chasing Convex Bodies with Linear Competitive Ratio [PDF]
Journal of the ACM, 2020 We study the problem of chasing convex bodies online: given a sequence of convex bodies the algorithm must respond with points
C. J. Argue +3 more
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Growing lupine and vetch in mixed crops
Acta Biologica Sibirica, 2022 This paper aimed to determine the efficiency of growing spring vetch and narrowleaf lupine in mixed crops to produce grain forage. Further, the paper evaluated the influence of seeding quantities, component ratios, and weather conditions on yield and ...
Andrey V. Bezgodov +1 more
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Banking Competition and Capital Ratios [PDF]
European Financial Management, 2007 AbstractEmpirical studies provide evidence that bank capital ratios exceed regulatory requirements. But why do banks maintain capital levels above regulatory requirements? We use data for more than 2,600 banks from 10 European countries to test recent theories suggesting that competition incentivises banks to maintain higher capital ratios.
Schaeck, Klaus, Cihák, Martin
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