Design representation

In the treatment of stereochemical aspects for many chemical problems such as synthetic design representation of tri- and tetracoordinate monocentric configurations by their parity descriptors suffices. The conformational aspect as well as higher coordinate and polycentric configurations can be neglected. Then, it is possible to reduce the CC-matrices to parity vectors Pn whose components +1,0, — 1 represent the configurational features. 

It is very rare that you need to see the individual. However, you do need pointing capabilities, highlighting capabilities, and annotation capabilities. The notion of collaboration around work versus collaboration between individuals strikes me as one of the ways that we will see different tool sets evolve to support those kinds of interactions. Thus, while I accept your premise, I really believe that enterprises are going to focus on things like instrumenting experiments and design representations, as opposed to substituting for this kind of face-to-face interaction. 

Level 4 Design Representation (Component Designer View)... 

The next two levels. Design Representation and Physical Representation, provide the information necessary to reason about individual component design and implementation issues. Some parts of level 4 may not be needed if at least portions of the physical design can be generated automatically from the models at level 3. 

Design representation space is an organized collection of attributes and their feasible values, which is necessary and sufficient to describe all known designs and has a potential for finding many new and unknown designs. It represents the State of the Art of knowledge in the problem domain. 

We could say that a design representation space (DRS) is an equivalent of our background knowledge (BK), but in this case our BK is presented in a formal and systematic way, which is useful for both the human designers and for various computer tools. A DRS has two major parts the symbolic and the numerical. The symbolic part contains all the symbolic attributes and their feasible values, while the numerical part contains all the numerical attributes and their specific feasible values or their feasible ranges of variation. 

Table 4.1 Design representation space for a class of small objects...

These attributes and their values are shown in a conceptual design representation space below. A combination of values describing a truss is shown in the table as bolded words. Obviously, a steel truss is a steel structure with straight members that are connected by hinges that is, a steel truss is described by a specific combination Al Material = Steel, A2 Member Shape = Straight, and A3 Connection Type = Hinged (Table 4.2). 

Very rarely, if ever, only three stages are sufficient to produce meaningful results. Usually, several hundred stages are sufficient, but sometimes tens of thousands of stages are necessary for complex design problems associated with a large design representation space that needs to be searched. 

Rosen, D. W., Dixon, J. R., and Finger, S. Conversions of Feature-Based Design Representations Using Graph Grammar Parsing, Journal of Mechanical Engineering, vol. 116, no. 9 (1994) pp. 785-792. 

No taxonomy of potential SAV failure conditions for evaluating the design representation. 

However, designers are hampered by the current lack of suitable specialised design representations for asynchronous systems, and support or analysis tools for checking properties such as equivalence or deadlock-freedom, the latter being of particular concern to the asynchronous design community. 

We can now apply the above model-checking t proach to asynchronous hardware designs, checking that they have the required behaviour, expressed as a CTL formula, and that they do not suffer from problems such as deadlock. We first oudine the Rainbow framework for giving compact design representations, and then illustrate how this can lead to a reduction in the size of model generated. 

R. A. Walker and D. E. Thomas. Design representation and transformation in the system architect s workbench. Proc. of the Int. Conf on Comp. Aided Design, pages 166-169, 1987. 

Crystallization from a Vapor Phase, Sublimation and Desublimation 529 Table 7-9. Selected sublimer designs. Representation according to Matz [7.2]. 

A comprehensive design representation, with the aid of a graphical engine, of the architectural elements of a program and their interdependencies... 

The software characteristics (S) metric includes aU software characteristics that are hkely to impact software reliability. This metric is subdivided into a requirements and design representation metric (SI) and a software... 

Hazard analysis aetivities have been performed for some time by the Trust. The added value of reeent improvements has been to provide a formal framework and associated methods into which they fit as a major component. The analyses were founded on traditional risk management techniques. These have been reviewed and developed, resulting in a similar format for the records produced. Improvements have been made by using a team rather than an individual for carrying out the analysis. The use of a set of guide words has helped to enable a consistent approach to the examination of design representations of the system under review. The technique was heavily based on the HAZOP method advocated in Def Stan 00-58 (MoD 1986) in this, it evolved into a similar form to that promoted as SHARD (Pumfrey 1999). 

HAZOP study depends on the ability and experience of the study leader and the knowledge, experience, and interaction between team members. HAZOP only considers parts that appear in the design representation. Activities and operations which do not appear in the representation are not considered. 

Design representations shall be based on unambiguously defined notations. 

This book presents a detailed survey of existing high-level synthesis systems. Naturally, academic approaches are in the majority, but surprisingly many industrial research systems could be included. The book begins with an introduction to high-level synthesis, which covers both design representation and the sequence of steps... 

Design representations have been classified systematically by Bell and Newell [4] and Gajski and Kuhn [28], among others. Classifications commonly involve two orthogonal axes the level of abstraction and the domain. Figure 1 shows some commonly accepted levels and domains this is a tabular version of the well-known Y-chart [28]. 

R. Camposano and R.M. Tabet, Design Representation for the Synthesis of Behavioral VHDL Models, in J.A. Darringer, F.J. Rammig, editors, Proceedings CHDL 89, Elsevier Science Publishers, 1989. 

R.A. Walker and D.E. Thomas, Design Representation and Transformation in the System Architect s Workbench, Proceedings of the ICCAD 87, pp. 166-169, Santa Clara, CA, November 1987. 

Donald E. Thomas and John A. Nestor, Defining and Implementing a Multilevel Design Representation With Simulation Applications , IEEE Trans, on CAD, pages 135-145, July 1983. 

J.A. Nestor and D.E. Thomas, Defining and Implementing a Multilevel Design Representation with Simulation Applications , Proc. of the 19th DAC, pages 740-746, Jime 1982. 

System overview, design representations, transformations, architectural partitioning, scheduling, data path synthesis, microprocessor synthesis, a fifth-order digital elliptic wave filter example, a Kalman filter example, the BTL310, the MCS6502, and the MC68000. 

Robert L. Blackburn, Relating Design Representations in an Automated IC Design System, PhD Thesis, Dept, of Electrical and Computer Engineering, Carnegie Mellon University, October 1988. 

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