منابع مشابه
Modelling the Golomb Ruler
The Golomb ruler problem has been proposed as a challenging constraint satisfaction problem. We consider a large number of di erent models of this problem, both binary and non-binary. The problem can be modelled using quaternary constraints, but in practice using a set of auxiliary variables and ternary constraints gives better results. A binary encoding of the problem gives a smaller search tr...
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In the midwifery profession, measuring pelvic and cervical dilatation is essential for making decisions, especially when the mother is in labor phase. For this reason, several studies have been conducted in pelvimetry.[1‐4] Measurement of the cervix and judgments about pelvic dimensions are performed by the midwifeʹs fingers. However, as finger size and how to measure the distance between the f...
متن کاملTriangles, Ruler and Compass
A triangle can be specified by giving three independent geometric relationships defined between its elements. Usually, these relationships are distances between two vertices, angles between two sides, and heights. For each triangle specified by a set of three of such relationships, we present a procedure that constructs the triangle using ruler and compass alone. ∗While on leave in Computer Sci...
متن کاملRuler: Programming Type Rules
Some type systems are first described formally, to be sometimes followed by an implementation. Other type systems are first implemented as a language extension, to be sometimes retrofitted into a formal description. In neither case it is an easy task to keep both artefacts consistent. In this paper we present Ruler, a domain specific language for type rules. Our prototype compiler for Ruler bot...
متن کاملThe Carpenter’s Ruler Folding Problem
A carpenter’s ruler is a ruler divided into pieces of different lengths which are hinged where the pieces meet, which makes it possible to fold the ruler. The carpenter’s ruler folding problem, originally posed by Hopcroft, Joseph and Whitesides, is to determine the smallest case (or interval on the line) into which the ruler fits when folded. The problem is known to be NP-complete. The best pr...
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ژورنال
عنوان ژورنال: Science
سال: 1970
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.167.3923.1385