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.
See also: Design drawing

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 ?
However, we have noticed that some students have a tendency to place too much focus on the syntax of the UML diagram (the tool) rather than the value of the diagram in performing systems analysis and design (the activity).
The second step was programming the missing diagram methods in ArcGIS 9.
They concluded that diagramming is a visual metaphor representing complex hierarchy and word interrelations in sentences more simply as lines in diagrams.
Ramzin's diagram was constructed similarly to Mollier's but was originally adapted to processes oriented toward the drying processes.
While literally getting the picture can be that easy, making the diagram is typically just the beginning of a process in which the physicist uses standard rules to map each line segment and intersection of lines to specific mathematical terms.
To realize the precision of the calculations, we size up how they are affected by allowance for (I) the contribution from the diagrams
Figure 1 shows the tree diagram with the costs, payoffs, and probabilities.
Once the design issues have been addressed, EventStudio automatically generates sequence diagrams and collaboration diagrams.
In my experience they didn't exactly diagram themselves; they had to be coaxed, if not wrestled.
From the diagram, the area of the larger square is four square units, while the area of the smaller square is four triangles that add to two square units.
In the diagram condition, the introductory lesson and each example in the conceptual exercise contained a diagram representing the classical conditioning.