Diagram

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diagram

Maths a pictorial representation of a quantity or of a relationship
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

diagram

A plan, sketch, drawing, chart or graph, not necessarily representational, that explains, demonstrates or clarifies the arrangement and relationship of the parts to a whole.
See also: Design drawing
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Diagram

 

in botany, a graphic representation of the shape, number, and location of the parts of a flower or leafy shoot by projecting them on a horizontal surface. The diagram of a flower is made on the basis of one or several transverse sections of the bud. Using conventional symbols, the diagram of a flower may show only the parts visible in a cross section (an empirical diagram of the flower) or it may also show not-yet-developed parts or parts that have disappeared (a theoretical diagram of the flower, based on the study of many empirical diagrams). The diagram of a shoot is based on a schematic representation of a transverse section through the vegetative bud.


Diagram

 

in design documentation, a document showing in conventional notation the components of an article or installation and the connections or links between components. Diagrams are usually drawn without regard to scale or to the actual spatial arrangement of the components. They may be classified according to the type of components and connections between components as electrical, pneumatic, hydraulic, kinematic, or combination diagrams. They may also be classified according to the purpose for which they will be used.

Block diagrams that define each principal working component of an article or installation and the component’s purpose and interconnections are developed concurrently with the design of the article, before any other type of diagram; they are used in studying the article’s structure and functioning and are referred to when the article is in actual use.

Functional diagrams showing the processes that occur within an article and within individual components are used in studying the functional capabilities of the article, as well as in installation, adjustment, control, and repair work.

Schematic diagrams define the components of the article that constitute a complete set and the interconnections between components; they usually give a detailed representation of the working principle of the article and may serve as a basis for developing other design documents, such as electrical installation blueprints and specification sheets.

Circuit diagrams show connectors between components and the locations of connectors and lead-ins; such diagrams also illustrate methods of laying out, mounting, and fastening conductors, cables, and piping. Others show external connections to other articles; such diagrams are used for the installation and operation of complex units. Diagrams showing the principal parts of a complex and the interconnections between subassemblies when the complex is installed and operated are designed primarily to give a general representation of the complex. Layout diagrams show the relative spatial arrangement of components.

In the USSR the procedure for drawing up diagrams is established by State Standards (GOST).

V. N. KVASNITSKII

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

diagram

[′dī·ə‚gram]
(computer science)
A schematic representation of a sequence of subroutines designed to solve a problem; it is a coarser and less symbolic representation than a flow chart, frequently including descriptions in English words.
(graphic arts)
A line drawing that represents an object or area according to a scale.
A graph which shows the relation between two variables or which plots the occurrence of events or objects as a function of two variables.
(mathematics)
A picture in which sets are represented by symbols and mappings between these sets are represented by arrows.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
I challenge him to present concrete evidence, not just silly diagrams," she said in a statement.
For better understanding of the distinction between the switch, continuous and step controllers as well as for understanding the place of these controllers among other controllers a new classification of automatic controllers diagrams with the control channels is proposed.
With the permission of Genero M., we selected twenty-six UML class diagrams [13] related to the bank information systems as the object of the experiment.
This article is a continuation of [6-8], where they first described a formal model of class, sequence and state machine diagrams and checked the consistency between the different views.
At present, the researches on guide sign diagrams still focus on analyzing the cognition effect in certain road conditions or the influence of some factors in the sign diagrams on cognition, which ignored the complexity of the diagrams themselves.
at look a have and diagram the to back go look, didn't you if So is.
Max-plus theory and random simulation are common methods for the evaluation of train operation diagrams based on patterns of delay propagation and exploit the cyclic characteristic of operation diagrams by utilizing the lines within a cycle as a study unit.
"Aveva Diagrams is much more than just a schematics design programme," explains Dave Wheeldon, chief technology officer, Aveva.
Data Flow Diagrams allow a limited number of symbols to represent the data:
So by the 100th anniversary of Russell's 1914 publications, we have plotted millions of stars on H-R diagrams and have an orbiting spacecraft that will provide measurements of millions more.
The seventh edition of this anatomical guide to the rat brain, this version contains 161 revised coronal diagrams with accompanying photographic plates of microtome slides taken at 120 micrometer intervals through the brain from its anterior to posterior end.