منابع مشابه
Centers of sets of pixels
The center of a connected graph G is the set of nodes of G for which the maximum distance to any other node of G is as small as possible. If G is a simply connected set of lattice points (\pixels") with graph structure deened by 4-neighbor adjacency, we show that the center of G is either a 2-by-2 square block, a diagonal staircase, or a (dotted) diagonal line with no gaps. The authors thank Fr...
متن کاملSets with Several Centers of Symmetry
Let A be a finite subset of the group Z2. Let C = {c0, c1, . . . , cs−1} be a finite set of s distinct points in the plane. For every 0 ≤ i ≤ s− 1, we define Di = {a− a′ : a ∈ A, a′ ∈ A, a + a′ = 2ci} and Rs(A) = |D0 ∪D1 ∪ · · · ∪ Ds−1|. In [1, 2], we found the maximal value of Rs(A) in cases s = 1, s = 2 and s = 3 and studied the structure of A assuming that R3(A) is equal or close to its maxi...
متن کاملGeneralized Centers of Finite Sets in Banach
We study mainly the class (GC) of all real Banach spaces X such that the set E f (a) of the minimizers of the function X 3 x 7 ! f(kx ? a 1 k;: : : ; kx ? a N k) is nonempty whenever N is a positive integer, a 2 X N , and f is a continuous monotone coercive function on 0;+1 N. For particular choices of f, the set E f (a) coincides with the set of Chebyshev centers of the set fa i : i = 1;: :: ;...
متن کاملthe pathology of historical texts translation: a study of persian translations of 7th volume of cambridge history of iran
ترجمه با گسترش زبان آغاز شده و اهمیت آن روز به روز افزایش می یابد، و برای اولین بار به عنوان شاخه ای از دانش و روشی برای انتقال علوم، فرهنگ و تجربه در در دوره قاجار در ایران آغاز شد. در حقیقت متون تاریخی از اولین متونی هستند که در ایران ترجمه شدند چرا که به سیاستمداران آن دوره کمک می کردند تا به علل موفقیت جهان غرب و پیشرفت هایشان در طول تاریخ پی ببرند، بنابراین به تدریج ترجمه این گونه متون رون...
15 صفحه اولClustering of Fuzzy Data Sets Based on Particle Swarm Optimization With Fuzzy Cluster Centers
In current study, a particle swarm clustering method is suggested for clustering triangular fuzzy data. This clustering method can find fuzzy cluster centers in the proposed method, where fuzzy cluster centers contain more points from the corresponding cluster, the higher clustering accuracy. Also, triangular fuzzy numbers are utilized to demonstrate uncertain data. To compare triangular fuzzy ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Discrete Applied Mathematics
سال: 2000
ISSN: 0166-218X
DOI: 10.1016/s0166-218x(99)00248-6