نتایج جستجو برای: n queen problem
تعداد نتایج: 1786869 فیلتر نتایج به سال:
Email: [email protected] Abstract: In the game of chess, the queen can attack any piece that lies on the same row, on the same column, or along a diagonal. The eight-queens is a classic logic puzzle. The task is to place eight queens on a chessboard in such a fashion that no queen can attack any other queen. The eight-queen puzzle is often used to illustrate problem-solving or backtrack...
We investigated how group members achieve collective decision-making, by considering individual intrinsic behavioural rules and behavioural mechanisms for maintaining social integration. Using a simulated burrow environment, we investigated the behavioural rules of coordinated workload for soil distribution in a eusocial mammal, the naked mole-rat (Heterocephalus glaber). We tested two predicti...
Risk aggregation is a popular method used to estimate the sum of a collection of financial assets or events, where each asset or event is modelled as a random variable. Applications include insurance, operational risk, stress testing, and sensitivity analysis. In practice the sum of a set of random variables involves the use of two well-known mathematical operations: n-fold convolution (for a f...
Biological assays were used to evaluate the effect of the insect growth regulator fenoxycarb (ethyl (2-p-phenoxyphenoxy) ethyl carbamate) on production of queen-derived dealation inhibitory pheromone and the queen recognition pheromone of Solenopsis invicta Buren. Treated virgin and mated queens weighed less and were less capable of inhibiting dealation by female alates than were nontreated con...
1 Department of Neurodegenerative Disease, University College London Institute of Neurology, Queen Square, London WC1N 3BG, UK 2 Department of Molecular Neuroscience, University College London Institute of Neurology, Queen Square, London WC1N 3BG, UK 3 UCL Genetics Institute, Department of Genetics, Environment and Evolution, UCL, London WC1E 6BT, UK 4 Sobell Department of Motor Neuroscience an...
OBJECTIVE To review the outcome for Hong Kong residents undergoing cadaveric liver transplantation in mainland China. DESIGN Retrospective study. SETTING Liver Transplant Centre, university teaching hospital, Hong Kong. SUBJECTS AND METHODS A retrospective review of medical records was undertaken for patients at Queen Mary Hospital who underwent cadaveric liver transplantation in China be...
We investigated worker policing by egg eating in the ponerine ant Pachycondyla inversa, a species with morphologically distinct queens and workers. Colonies were split into one half with the queen and one half without. Workers in queenless colony fragments started laying unfertilized male eggs after three weeks. Worker-laid eggs and queen-laid eggs were introduced into five other queenright col...
Tomoko MATSUZONO MBBS, MRCOG Department of Obstetrics and Gynaecology, Queen Elizabeth Hospital, Hong Kong Kam-On KOU MBBS, MRCOG, FHKCOG, FHKAM (O&G) Department of Obstetrics and Gynaecology, Queen Elizabeth Hospital, Hong Kong Chung-Fan POON APN, RN, RM, MSc Health Care (Nursing) Department of Obstetrics and Gynaecology, Queen Elizabeth Hospital, Hong Kong Kwok-Yin LEUNG MBBS, MD, FRCOG, FHKA...
Morphological differentiation in the ground beetles of the Nebria gregaria group, found on the Queen Charlotte Islands, has been used as support for the glacial refugium proposed for the northwest coast of North America. Two members of this species group, N. charlottae and N. louiseae, are restricted to cobble beaches in this archipelago. A third, N. haida, is found only in alpine regions of th...
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