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  2. AP Art and Design - Wikipedia

    en.wikipedia.org/wiki/AP_Art_and_Design

    Advanced Placement (AP) Art and Design, [1] formerly known as AP Studio Art, is a series of courses offered by the College Board as part of its Advanced Placement program. AP Art and Design is divided into three categories: 2-D Art and Design, 3-D Art and Design, and Drawing.

  3. Envelope (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Envelope_(mathematics)

    In geometry, an envelope of a planar family of curves is a curve that is tangent to each member of the family at some point, and these points of tangency together form the whole envelope. Classically, a point on the envelope can be thought of as the intersection of two " infinitesimally adjacent" curves, meaning the limit of intersections of ...

  4. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    When part definition is defined mathematically via a solid model, the assertion that one cannot interrogate the model—the direct analog of "scaling the drawing"—becomes ridiculous; because when part definition is defined this way, it is not possible for a drawing or model to be "not to scale". A 2D pencil drawing can be inaccurately ...

  5. Technical drawing - Wikipedia

    en.wikipedia.org/wiki/Technical_drawing

    There are two types of computer-aided design systems used for the production of technical drawings: two dimensions ("2D") and three dimensions ("3D"). An example of a drawing drafted in AutoCAD. 2D CAD systems such as AutoCAD or MicroStation replace the paper drawing discipline. The lines, circles, arcs, and curves are created within the software.

  6. Envelope (waves) - Wikipedia

    en.wikipedia.org/wiki/Envelope_(waves)

    In physics and engineering, the envelope of an oscillating signal is a smooth curve outlining its extremes. [1] The envelope thus generalizes the concept of a constant amplitude into an instantaneous amplitude. The figure illustrates a modulated sine wave varying between an upper envelope and a lower envelope. The envelope function may be a ...

  7. Envelope (motion) - Wikipedia

    en.wikipedia.org/wiki/Envelope_(motion)

    A different wheel envelope must be generated for each wheel/tire combo for which the vehicle is rated. Much of this analysis is done using CAD/CAE systems running on computers. Of course, high speed collisions, during an accident, are not considered "normal driving conditions", so the wheel and tire may very well contact other parts of the ...

  8. CAD standards - Wikipedia

    en.wikipedia.org/wiki/CAD_standards

    ISO Standards Handbook – Technical drawings, a broad collection of all basic ISO drawing standards Vol.1 Technical drawings in general, ISBN 92-67-10370-9; Vol.2 Mechanical engineering drawings, construction drawings, drawing equipment, ISBN 92-67-10371-7; ISO 128 Technical drawings—General principles of presentation

  9. Envelope (category theory) - Wikipedia

    en.wikipedia.org/wiki/Envelope_(category_theory)

    The completion of a locally convex topological vector space is an envelope of in the category of all locally convex spaces with respect to the class of Banach spaces: [8] =. Obviously, X {\displaystyle X^{\blacktriangledown }} is the inverse limit of the quotient Banach spaces X / U {\displaystyle X/U} (defined above):