نتایج جستجو برای: hard problems

تعداد نتایج: 710339  

Journal: :INFORMATION TECHNOLOGY IN INDUSTRY 2021

Journal: :Theoretical Computer Science 2002

Journal: :Journal of Statistical Mechanics: Theory and Experiment 2008

Journal: :International Journal of Pattern Recognition and Artificial Intelligence 2003

Journal: :Journal of the Operations Research Society of Japan 1996

Journal: :Transactions of the American Mathematical Society 2021

We prove that certain problems naturally arising in knot theory are NP–hard or NP–complete. These the of obtaining one diagram from another a link bounded number Reidemeister moves, determining whether has an unlinking splitting k <mml:annotation enc...

Journal: :Journal of the American Academy of Child and Adolescent Psychiatry 2018
Jasmin Wertz Jessica Agnew-Blais Avshalom Caspi Andrea Danese Helen L Fisher Sidra Goldman-Mellor Terrie E Moffitt Louise Arseneault

OBJECTIVE Childhood conduct problems are associated with poor functioning in early adulthood. We tested a series of hypotheses to understand the mechanisms underlying this association. METHOD We used data from the Environmental Risk (E-Risk) Longitudinal Twin Study, a birth cohort of 2,232 twins born in England and Wales in 1994 and 1995, followed up to age 18 years with 93% retention. Severe...

1995
Thomas Schiex Hélène Fargier Gérard Verfaillie

In order to deal with over-constrained Constraint Satisfaction Problems, various extensions of the CSP framework have been considered by taking into account costs, uncertainties, preferences, priorities...Each extension uses a specific mathematical operator (+;max : : :) to aggregate constraint violations. In this paper, we consider a simple algebraic framework, related to Partial Constraint Sa...

1961
J. H. Kahn

a relevance extending into more general fields. The headings include?A Community Approach to Preventive Psychiatry, The Psychology of Pregnancy, Early Mother-Child Relationships, and Mental Health Aspects of Family Life. Building on a concept from an earlier work (Emotional Problems of Early Childhood, p. 156) he pays attention to pathogenic forces in the community, together with the traditiona...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید