Editorial and personnel-placement correspondence should be addressed to SCIENCE, 1515 Massachusetts Ave., NW, Washington 5, D.C. Manuscripts should be typed with double spacing and submitted in duplicate. The AAAS assumes no responsibility for the safety of manuscripts or for the opinions expressed by contributors. For detailed suggestions on the preparation of manuscripts and illustrations, se...

This paper deals with the design of energy management strategy (EMS) for a fuel cell hybrid vehicle (FCHV) with hybrid energy storage system (HESS) using energetic macroscopic representation (EMR). It discusses the design options including power, energy, and operating strategy as they relate to the energy storage system. The studied HESS is composed of battery/ultracapacitor (BAT/UC) system all...