# Diagram

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## diagram

Maths a pictorial representation of a quantity or of a relationship

## 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.

## 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

## 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.
References in periodicals archive ?
Some textbooks have used examples of process flows or UML diagrams to illustrate Systems Development activities.
Some types of composite and comparative diagrams can not be created automatically.
A June 2010 symposium united researchers and students working on Voronoi diagrams and their applications in fields such as computer science, computer graphics, geomatics, computational geometry, robotics, bioinformatics, and chemistry.
Although Reed-Kellog diagrams were not originally intended to distinguish underlying from surface structures, bracketing missing/deleted elements enables displaying such distinctions.
In order to understand that the time difference between the appearance of the three diagrams was not great for the communication conditions of that time, we should remember that it happened less than a hundred years ago, when people communicated only in writing, using the postal services, mail first carried on horses or by ships, rare railroad traffic--anyway, all much slower than nowadays.
What makes the diagram so intriguing is that it often conveys something which cannot easily be put into words--that is the point; it is the coded language of creative design intelligence which does not automatically operate successfully in the world of bureaucratic tick boxes or cultures in which verbal or literary skills are too dominant.
For physicists, however, the diagrams offer a bare-bones way of representing extremely complicated mathematical expressions.
W], the contributions from the diagrams 6 through 8 are negligible as compared to one coming out of the diagram 5, which renders the common bremsstrahlung of a final electron [6].
The user can also control title block placement and frame each page or entire multiple page diagrams for professionally printed design work and custom reports.
While it is useful for visualizing the problem, by itself the tree diagram does not provide a solution to the problem.
Once the design issues have been addressed, EventStudio automatically generates sequence diagrams and collaboration diagrams.
Cogwheels Of The Mind: The Story Of Venn Diagrams is expertly written by statistician and geneticist A.

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