# pattern

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## pattern

Manufacturing a wooden or metal shape or model used in a foundry to make a mould
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## Pattern

The juxtaposition of repetitive elements in a design, organized so as to produce an arrangement of parts that are viewed as an unit; may occur at various scales and sizes.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

## Pattern

(also, development), in geometry. The pattern of a polyhedron is a set of polygons for which it is shown how the sides and vertices of the polygons must be joined in order to ob-

Figure 1

tain the polyhedron. Several conditions must be met here: each side of a polygon must be joined to no more than one side of another polygon; it must be possible to pass from one polygon to another polygon by traversing pairwise joined polygons; and joined sides must have equal lengths. The pattern of a cube is shown in Figure 1.

Figure 2

In such fields as descriptive geometry and drafting, the concept of pattern is sometimes applied to curved surfaces. Thus, the pattern of the lateral surface of a cone is a sector of a circle (Figure 2).

## Pattern

(Russian, shablom), in foundry production, an element of a gated pattern, consisting of a flat device whose working side has a highly accurate profile. A distinction is made between molding and control patterns. The former, in the form of wooden boards, are used in individual and small-series production; they take the place of a solid casting pattern or corebox in the manufacture of casting molds and mold cores for medium-size and large castings having the outline of a body of revolution (such as cups, vats, covers, and pulleys). The cavity of the mold or the working surface of the core is produced by rotating the molding pattern around its central axis (a core spindle is positioned at this place in the mold). Control patterns are made of plywood or sheet steel and are used for checking the accurate placement of cores in the cavity of a casting mold during assembly and preparation for pouring.

M. N. SOSNENKO

## pattern

(aerospace engineering)
The flight path flown by an aircraft, or prescribed to be flown, as in making an approach to a landing.
(engineering)
A form designed and used as a model for making things.
(graphic arts)
A design or form.
(mathematics)
An equivalence class of colorings of the elements of a finite set, which are indistinguishable with respect to a group of permutations of the colors.
(ordnance)
The distribution of a series of shots fired from one gun or a battery of guns under conditions as nearly identical as possible, the points of impact of the projectiles being dispersed about a point called the center of impact.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## pattern

1. A model made in some easily worked material (such as plaster or wood) which serves as a guide, with respect to form and dimensions, in laying out any piece of work, esp. to preserve and secure uniformity and accuracy.
2. A design, considered as a unit, of which an idea can be given by a fragment, as a diaper pattern.
3. In molding, a form used to provide the interior shape of the mold.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

## pattern

i. A flight pattern that an aircraft must follow when approaching for landing and when leaving the airport after takeoff.
ii. Radiation of the transmitting aerial as plotted on a diagram of the field strength for each bearing.
iii. A shape traced out on the ground by the track of the aircraft while following certain procedures, such as making the circuit, making procedure turns, while holding, and while carrying out demonstrations. See circuit and holding pattern.
References in periodicals archive ?
///////// * They enable the exchangeability of design pattern descriptions in a straightforward way.
We use a hierarchical organization of pattern containers.
To reduce the generation of duplicate subgraphs, gSpan only conducts the right-most extension on the vertices in the right-most path when growing a graph pattern. GSpan generates frequent subgraphs in the DFS lexicographic order.
These methods belong to a pattern post-processing approach which first mines all frequent itemsets and then generates representative itemsets based on some distance measure.
Following the collection of the data and application of the model, a curve was created to the cost data to compare the cost breakeven point to the pattern volume (Fig.
As discussed, you can select a pattern based on bust, waist and hips, using the waist/htp measurements for lower body garments and the bust/waist measurements for upper body garments.
The initiatives include a major increase in capital committed to Pattern Development 2.0, and a minority investment by Pattern Energy, as well as a significant expansion of the development pipeline.
But the tip is not to include other pattern within the space.
It is the practice in which faults detected by a pattern are deleted from the fault list prior to the simulation of any subsequent pattern.
Palindromic pattern 12121 and Tautonymic pattern 5656
Next, we choose D = dN and set the phase of the two added elements to be equal to P = -[pi] + 1/2 kD sin [[theta].sub.peak] so that the main lobe of the two-element array pattern is aligned to the main lobe of the sum pattern at the target direction and then to set the amplitude of the two added elements, A, to place a null in the direction of the desired signal (i.e., [AF.sub.Diff] [([theta])|[sub.[[theta]=[theta].sub.peak]] = 0).
DAY 3 On the third day, have students complete all pattern work (lightly, in pencil) within the drawn L.

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