224 research outputs found
A value for bi-cooperative games
No full textBi-cooperative games were introduced by Bilbao et al. as a generalization of TU cooperative games, in which each player can participate positively, negatively, or not at all. In this paper, we propose a definition of a share of the worth obtained by some players after they decided on their participation in the game. It turns out that the cost allocation rule does not look for a given player to her contribution at the opposite participation option to the one she chooses. The relevance of the value is discussed on several examples.Bi-cooperative games ;Value ;Efficiency
A decade of application of the Choquet and Sugeno integrals in multi-criteria decision aid
No full textThe main advances regarding the use of the Choquet and Sugeno integrals in multi-criteria decision aid over the last decade are reviewed. They concern mainly a bipolar extension of both the Choquet integral and the Sugeno integral, interesting particular submodels, new learning techniques, a better interpretation of the models and a better use of the Choquet integral in multi-criteria decision aid. Parallel to these theoretical works, the Choquet integral has been applied to many new fields, and several softwares and libraries dedicated to this model have been developed.Choquet integral, Sugeno integral, capacity, bipolarity, preferences
Bipolarization of posets and natural interpolation
No full textThe Choquet integral w.r.t. a capacity can be seen in the finite case as a parsimonious linear interpolator between vertices of . We take this basic fact as a starting point to define the Choquet integral in a very general way, using the geometric realization of lattices and their natural triangulation, as in the work of Koshevoy. A second aim of the paper is to define a general mechanism for the bipolarization of ordered structures. Bisets (or signed sets), as well as bisubmodular functions, bicapacities, bicooperative games, as well as the Choquet integral defined for them can be seen as particular instances of this scheme. Lastly, an application to multicriteria aggregation with multiple reference levels illustrates all the results presented in the paper.Interpolation; Choquet integral; Lattice; Bipolar structure
Importance du travail du sol : typologie des modes de mise en œuvre et effet sur le rendement des cultures
No full textCT1 ; EnjS3 ; Département E.A.National audienc
A Representation of Preferences by the Choquet Integral with Respect to a 2-Additive Capacity
No full textIn the context of Multiple criteria decision analysis, we present the necessary and sufficient conditions allowing to represent an ordinal preferential information provided by the decision maker by a Choquet integral w.r.t a 2-additive capacity. We provide also a characterization of this type of preferential information by a belief function which can be viewed as a capacity. These characterizations are based on three axioms, namely strict cycle-free preferences and some monotonicity conditions called MOPI and 2-MOPI.multicriteria decision making; Choquet integral; 2-additive capacity; MACBETH
Importance du travail du sol : typologie des modes de mise en œuvre et effet sur le rendement des cultures
No full textCT1 ; EnjS3 ; Département E.A.National audienc
A characterization of the 2-additive Choquet integral through cardinal information
No full textIn the context of multiple criteria decision analysis, we present the necessary and sufficient conditions to represent a cardinal preferential information by the Choquet integral w.r.t. a 2-additive capacity. These conditions are based on some complex cycles called cyclones.MCDA; Choquet integral; 2-Additive capacity; MACBETH methodology
Carotid atherosclerosis and risk of subsequent coronary event in outpatients with atherothrombosis.
No full textThe presence of carotid plaque reflects overall atherosclerotic burden and may predict coronary artery disease events. We examined the association among carotid atherosclerosis, history of atherothrombotic events, and risk of coronary events. Among 45 227 patients in the Reduction of Atherothrombosis for Continued Health (REACH) Registry with 4-year follow-up, 23 364 patients with information on carotid atherosclerosis at baseline were analyzed. The primary outcome was the composite of first occurrence of cardiovascular death, myocardial infarction, or coronary hospitalization. The carotid atherosclerosis was present in 46% of patients (n=10 725) and was associated with increasing conventional cardiovascular risk factors and extent of symptomatic vascular disease. During 4-year follow-up, 4304 patients experienced ≥1 coronary event. After adjustment for cardiovascular risk factors and geographic region, the risk of coronary events increased by 22% (95% confidence interval [CI], 14%-30%) in patients with versus without carotid atherosclerosis. The relative increase was 18% (95% CI, -7%-51%) in patients enrolled with multiple risk factors only, 25% (95% CI,16%-35%) in patients with coronary artery disease, 46% (95% CI,28%-65%) in patients with cerebrovascular disease, and 37% (95% CI,17%-60%) in patients with peripheral artery disease. Carotid atherosclerosis was associated with increased risk, even among patients with previous myocardial infarction but no known stroke (P=0.001) or among patients with previous stroke but no known myocardial infarction (P<0.001). Carotid atherosclerosis was an independent predictor of coronary events across all types of symptomatic vascular disease and had an incremental effect on risk regardless of risk factors or location of vessel disease
The Importance and Interaction Indices of Bi-Capacities Based on Ternary-Element Sets
No full textGrabisch and Labreuche have recently proposed a generalization of capacities, called the bi-capacities. Recently, a new approach for studying bi-capacities through introducing a notion of ternary-element sets proposed by the author. In this paper, we propose many results such as bipolar Mobius transform, importance index, and interaction index of bi-capacities based on our approach
Impact of living and socioeconomic characteristics on cardiovascular risk in ischemic stroke patients
No full textObjective: We aimed to stratify the risk of vascular event recurrence in patients with cerebral infarction according to living and socioeconomic characteristics and geographic region. Method: The Outcomes in Patients with TIA and Cerebrovascular Disease (OPTIC) study is an international prospective study of patients aged 45 years or older who required secondary prevention of stroke [following either an acute transient ischemic attack, minor ischemic strokes, or recent (less than six-months previous), stable, first-ever, nondisabling ischemic stroke]. A total 3635 patients from 245 centers in 17 countries in four regions (Latin America, Middle East, North Africa, South Africa) were enrolled between 2007 and 2008. The outcome measure was the two-year rate of a composite of major vascular events (vascular death, myocardial infarction and stroke). Results: During the two-year follow-up period, 516 patients experienced at least one major cardiovascular event, resulting in an event rate of 15·6percent (95percent confidence interval 14·4-16·9percent). Event rates varied across geographical region (P0·001), ranging from 13·0percent in Latin America to 20·7percent in North Africa. Unemployment status, living in a rural area, not living in fully serviced accommodation (i.e., house or apartment with its own electricity, toilet and water supply), no health insurance coverage, and low educational level (less than two-years of schooling) were predictors of major vascular events. Major vascular event rates steeply increased with the number of low-quality living-socioeconomic conditions (from 13·4percent to 47·9percent, adjusted P value for trend 0·001). Conclusion: Vascular risk in stroke patients in low- and middle-income countries varies not only with the number of arterial beds involved but also with socioeconomic variables. © 2014 World Stroke Organization.Abboud H, 2013, INT J STROKE, V8, P4, DOI 10.1111-j.1747-4949.2012.00893.x; Alberts MJ, 2009, EUR HEART J, V30, P2318, DOI 10.1093-eurheartj-ehp355; Avendano M, 2006, STROKE, V37, P1368, DOI 10.1161-01.STR.0000221702.75002.66; Bhatt DL, 2006, JAMA-J AM MED ASSOC, V295, P180, DOI 10.1001-jama.295.2.180; Cabral NL, 2011, NEUROEPIDEMIOLOGY, V36, P258, DOI 10.1159-000328865; Cox AM, 2006, LANCET NEUROL, V5, P181, DOI 10.1016-S1474-4422(06)70351-9; Feigin VL, 2009, LANCET NEUROL, V8, P355, DOI 10.1016-S1474-4422(09)70025-0; Ghali WA, 2001, JAMA-J AM MED ASSOC, V286, P1494, DOI 10.1001-jama.286.12.1494; Goldstein LB, 2001, STROKE, V32, P1091; Hart CL, 2000, STROKE, V31, P2093; Jia HG, 2012, J RURAL HEALTH, V28, P242, DOI 10.1111-j.1748-0361.2011.00397.x; KAPLAN GA, 1993, CIRCULATION, V88, P1973; Kapral MK, 2002, STROKE, V33, P268, DOI 10.1161-hs0102.101169; Kim AS, 2011, CIRCULATION, V124, P314, DOI 10.1161-CIRCULATIONAHA.111.018820; Kleindorfer DO, 2006, ANN NEUROL, V60, P480, DOI 10.1002-ana.20974; Kugler M, 2013, HUM DEV REP 2013 RIS; Miranda JJ, 2011, HEART, V97, P787, DOI 10.1136-hrt.2010.218537; Moreira E, 2011, NEUROEPIDEMIOLOGY, V36, P265, DOI 10.1159-000328867; O'Donnell MJ, 2010, LANCET, V376, P112, DOI 10.1016-S0140-6736(10)60834-3; Pedigo AS, 2010, ANN EPIDEMIOL, V20, P924, DOI 10.1016-j.annepidem.2010.06.013; Rodriguez D, 2011, J RURAL HEALTH, V27, P401, DOI 10.1111-j.1748-0361.2010.00352.x; RUBERMAN W, 1984, NEW ENGL J MED, V311, P552, DOI 10.1056-NEJM198408303110902; Sarrafzadegan N, 2012, SAUDI MED J, V33, P533; Sergeev AV, 2011, ETHNIC DIS, V21, P307; Smith GD, 1998, J EPIDEMIOL COMMUN H, V52, P153; Steenland K, 2004, AM J EPIDEMIOL, V159, P1047, DOI 10.1093-aje-kwh129; Steg PG, 2007, JAMA-J AM MED ASSOC, V297, P1197, DOI 10.1001-jama.297.11.1197; Sun ZQ, 2013, INT J STROKE, V8, P701, DOI 10.1111-j.1747-4949.2012.00897.x; Truelsen T, 2008, STROKE, V39, P1653, DOI 10.1161-STROKEAHA.107.510552; van den Bos GAM, 2002, J EPIDEMIOL COMMUN H, V56, P943, DOI 10.1136-jech.56.12.943; World Bank, 2004, WORLD DEV IND 2004; Yusuf S, 2001, CIRCULATION, V104, P2746, DOI 10.1161-hc4601.099487; Yusuf S, 2004, LANCET, V364, P937, DOI 10.1016-S0140-6736(04)17018-9; Yusuf S, 2011, LANCET, V378, P1231, DOI 10.1016-S0140-6736(11)61215-40
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