Heuristic Synthesis Research Articles

Heuristic synthesis of nonsharp separation sequences

AbstractThe preliminary synthesis of ordinary distillation schemes for separating a single feed into desired products is examined. Nonsharp products are emphasized, i.e., when components are desired in more than one product. Such sets lead naturally to columns with incomplete separation of the key components, including one‐section columns. Stream bypassing around separators and limited stream splitting are permitted. Sequences cannot have separators with identical key components, and only limited product fragmentation is considered. A heuristic ordering of separation options, coupled with a depth‐first application on a pictorial or a matrix representation of a stream, is proposed. Subsequently a best‐first search identifies the few better schemes. Partial sequences are (sub)optimized heuristically. Employing the present methodology on an example problem of four components and products resulted in annual cost savings of 42%, compared to the best sequence isolating the feed components.

あいまい有限状態システムによる多目的システムの発見的構成

あいまい有限状態システムによる多目的システムの発見的構成

Heuristics or Prescription: Synthesis Rather than Choice

The debate as to whether heuristics or prescription provides the best approach to teaching technical writing is still largely unresolved. When heuristics are used as process, as problem-solving devices, and when prescription is used as a product-producing device, a useful synthesis of the two approaches occurs. This article presents such a synthesis of heuristics and prescription; it concludes with a short annotated bibliography on heuristics and prescription which can be used by the technical writing teacher and the technical writer.

Comparative Analysis of Heuristic Synthesis Methods for Electricity Transmission Networks

This paper discusses and compares several synthesis methods for electricity distribution networks, assessing the validity of the feasibility constraints used in the various methods. Established methods, together with some original ideas, are explained; special reference is made to heuristics based on group-transfer concepts. The algorithms have been applied to data extracted from case studies to simulate a green-field synthesis of network configuration, thus results are comparable with existing network configurations. The results were produced using an interactive computing system.

Heuristic Structure Synthesis in a Class of Systems Using a Fuzzy Automaton

A heuristic synthesis method for a class of systems using a fuzzy automaton is proposed. The transition of system structure is represented by fuzzy relations, and the interconnection among subsystems, i.e., system structure, is determined by a heuristic policy. A computational algorithm is given on the basis of a simple learning system so as to realize the proposed method. Further, in order to avoid an ill-posed solution, a necessary condition is given with respect to the fuzzy transition matrix and the initial condition of system. A few examples are given to show how the proposed method works.

Comments on "Heuristic Synthesis of Microprogrammed Computer Architecture"

This correspondence points out the incorrectness of an example microprogram and associated performance improvement as presented in a recent paper.1 An amended microprogram is presented together with the revised performance improvement. The incorrectness is shown to reflect on the synthesis algorithm used to generate the example.

Heuristic Synthesis of Systems by Fuzzy Automaton

Heuristic Synthesis of Systems by Fuzzy Automaton

Heuristic Synthesis of Microprogrammed Computer Architecture

This paper describes an algorithm for the synthesis of applications-oriented microcode for a dynamically microprogrammable computer. The synthesis algorithm provides an iterative method for generating specialized architectures. Current attempts at generating specialized architectures can be considered as manual tuning due to human generation of specialized microcode. Heuristic instruction synthesis is described as one phase of a heuristic tuning process which attempts to automate the manual tuning process.