Proceedings of the First NASA/DoD Workshop on Evolvable Hardware最新文献_第2页

On the nature of two-bit multiplier landscapes 论二进制乘数景观的性质

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785433

Vesselin K. Vassilev, J. Miller, T. Fogarty

引用次数: 30

A comparison of dynamic fitness schedules for evolutionary design of amplifiers 放大器进化设计中动态适应度计划的比较

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785439

J. Lohn, G. Haith, S. Colombano, D. Stassinopoulos

{"title":"A comparison of dynamic fitness schedules for evolutionary design of amplifiers","authors":"J. Lohn, G. Haith, S. Colombano, D. Stassinopoulos","doi":"10.1109/EH.1999.785439","DOIUrl":"https://doi.org/10.1109/EH.1999.785439","url":null,"abstract":"High-level analog circuit design is a complex problem domain in which evolutionary search has recently produced encouraging results. However, little is known about how to best structure evolution far these tasks. The choices of circuit representation, fitness evaluation technique, and genetic operators clearly have a profound effect on the search process. In this paper, we examine fitness evaluation by comparing the effectiveness of four fitness schedules. Three fitness schedules are dynamic-the evaluation function changes over the course of the run, and one is static. Coevolutionary search is included, and we present a method of evaluating the problem population that is conducive to multiobjective optimization. Twenty-five runs of an analog amplifier design task using each fitness schedule are presented. The results indicate that solution quality is highest with static and coevolving fitness schedules as compared to the other two dynamic schedules. We discuss these results and offer two possible explanations for the observed behavior: retention of useful information, and alignment of problem difficulty with circuit proficiency.","PeriodicalId":234639,"journal":{"name":"Proceedings of the First NASA/DoD Workshop on Evolvable Hardware","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115205117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

Representation and robustness for evolved sorting networks 进化排序网络的表示与鲁棒性

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785462

J. Masner, J. Cavalieri, J. Frenzel, J. Foster

引用次数: 14

Realization of self-repairing and evolvable hardware structures by means of implicit self-configuration 利用隐式自配置实现硬件结构的自修复和进化

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785451

J. Moreno, J. Madrenas, J. Cabestany, E. Cantó, R. Kiełbik, J. Faura, J. Insenser

引用次数: 5

Evolving more efficient digital circuits by allowing circuit layout evolution and multi-objective fitness 通过允许电路布局进化和多目标适应度来进化更高效的数字电路

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785435

T. Kalganova, J. Miller

{"title":"Evolving more efficient digital circuits by allowing circuit layout evolution and multi-objective fitness","authors":"T. Kalganova, J. Miller","doi":"10.1109/EH.1999.785435","DOIUrl":"https://doi.org/10.1109/EH.1999.785435","url":null,"abstract":"We use evolutionary search to design combinational logic circuits. The technique is based on evolving the functionality and connectivity of a rectangular array of logic cells whose dimension is defined by the circuit layout. The main idea of this approach is to improve quality of the circuits evolved by the genetic algorithm (GA) by reducing the number of active gates used. We accomplish this by combining two ideas: 1) using multi-objective fitness function; 2) evolving circuit layout. It will be shown that using these two approaches allows us to increase the quality of evolved circuits. The circuits are evolved in two phases. Initially the genome fitness is given by the percentage of output bits that are correct. Once 100% functional circuits have been evolved, the number of gates actually used in the circuit is taken into account in the fitness function. This allows us to evolve circuits with 100% functionality and minimise the number of active gates in circuit structure. The population is initialised with heterogeneous circuit layouts and the circuit layout is allowed to vary during the evolutionary process. Evolving the circuit layout together with the function is one of the distinctive features of proposed approach. The experimental results show that allowing the circuit layout to be flexible is useful when we want to evolve circuits with the smallest number of gates used. We find that it is better to use a fixed circuit layout when the objective is to achieve the highest number of 100% functional circuits. The two-fitness strategy is most effective when we allow a large number of generations.","PeriodicalId":234639,"journal":{"name":"Proceedings of the First NASA/DoD Workshop on Evolvable Hardware","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115041709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 114

A model for dynamic adaptation in reconfigurable hardware systems 可重构硬件系统的动态自适应模型

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785448

G. Milne

引用次数: 9

Morphogenesis in plants: modeling the shoot apical meristem, and possible applications 植物的形态发生:茎尖分生组织的模拟及其可能的应用

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785445

E. Mjolsness, E. Meyerowitz, V. Gor, T. Mann

引用次数: 2

Optimization for aerospace conceptual design through the use of genetic algorithms 通过使用遗传算法优化航空航天概念设计

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785454

W. Crossley

引用次数: 12

The MorphoSys dynamically reconfigurable system-on-chip 该MorphoSys动态可重构的片上系统

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785447

Guangming Lu, H. Singh, Ming-Hau Lee, N. Bagherzadeh, F. Kurdahi, E. Filho, V. Alves

引用次数: 37

Improving correctness of finite-state machine synthesis from multiple partial input/output sequences 提高多部分输入/输出序列有限状态机合成的正确性

Proceedings of the First NASA/DoD Workshop on Evolvable Hardware Pub Date : 1999-07-19 DOI: 10.1109/EH.1999.785463

P. Chongstitvatana, C. Aporntewan

引用次数: 23