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1991 ACM SIGMOD International conference on Management of Data, SIGMOD 1991

作者： Shyy, Yuh-Ming Su, Stanley Y. W. Database Systems Research and Development Center Department of Computer and Information Science CSE 470 University of Florida GainesvilleFL32611 United States

ISBN: (纸本)0897914252

K is a high-level knowledge base programming language for doing general computation as well as for defining, querying, and manipulating databases in nontraditional application domains. The main features of K are: (i) knowledge abstraction facilities for supporting an extensible object-oriented semantic association knowledge model, (ii) a modularization mechanism for programming in the large, (iii) knowledge retrieval facilities for querying the knowledge base, and (iv) multi-paradigm programming constructs for specifying object-oriented, parallel, non-deterministic, and rule-based computations. This paper presents the linguistic facilities provided in K and the knowledge model it supports. © 1991 ACM.

关键词： Modular construction

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HIGH-ENERGY EFFICIENCY AND HIGH-POWER DENSITY PROTON-EXCHANGE MEMBRANE FUEL-CELLS - ELECTRODE-KINETICS AND MASS-TRANSPORT

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JOURNAL OF POWER SOURCES 1991年第3期36卷 299-320页

作者： SRINivASAN, S VELEV, OA PARTHASARATHY, A MANKO, DJ APPLEBY, AJ Center for Electrochemical Systems and Hydrogen Research Texas Engineering Experiment Station Texas A&M University System College Station TX 77843-3402 U.S.A.

The development of proton exchange membrane (PEM) fuel cell power plants with high energy efficiencies and high power densities is gaining momentum because of the vital need of such high levels of performance for extraterrestrial (space, underwater) and terrestrial (power source for electric vehicles) applications. Since 1987, considerable progress has been made in achieving energy efficiencies of about 60% at a current density of 200 mA/cm2 and high power densities (> 1 W/cm2) in PEM fuel cells with high (4 mg/cm2) or low (0.4 mg/cm2) platinum loadings in electrodes. This article focuses on: (i) methods to obtain these high levels of performance with low Pt loading electrodes - by proton conductor impregnation into electrodes, localization of Pt near front surface;(ii) a novel microelectrode technique which yields electrode kinetic parameters for oxygen reduction and mass transport parameters;(iii) demonstration of lack of water transport from anode to cathode;(iv) modeling analysis of PEM fuel cell for comparison with experimental results and predicting further improvements in performance;(v) recommendations of needed R&D for achieving the above goals.

关键词： Fuel Cells

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Silicon sensors for automotive applications

Silicon sensors for automotive applications

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International conference on Solid State sensors and Actuators (TRANSDUCERS)

作者： R.E. Sulouff Advanced Sensor Technology Siemens Automotive Auburn Hills MI USA

The author examines the strategic, economic, and technological considerations for silicon sensors for automotive applications. The view toward the 1990s as the decade of increased silicon sensors for automotive applications is examined in light of the economic and technological tradeoffs. It is pointed out that silicon sensors have demonstrated their value as Hall effect and pressure sensors for more than ten years and several hundred applications. The pressure sensor opportunities are continuing to grow and provide a technological base for growth in silicon accelerometers.< >

关键词： Silicon Automotive applications Automotive engineering Fuel economy Costs Intelligent sensors sensor systems Economics Optimized production technology Control systems

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Operating principles for integrated sensor processing

Operating principles for integrated sensor processing

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conference on Digital Avionics systems (DASC)

作者： M.J. Beacken M.J. Geller AT and T Bell Laboratories Federal Systems Advanced Technology Whippany NJ USA

Addresses the operating principles applicable to integrated avionics processors. The techniques described have been successfully applied in avionics programs within an integrated standard electronic modules format E (SEM E) heterogeneous multiple processor system. Analysis of avionics applications is blended with ease-of-use, programmability and systems considerations to derive the system principles. applications scheduling, initialization, termination and resource management techniques are considered.< >

关键词： Aerospace electronics Computer architecture Laser radar Resource management sensor phenomena and characterization Data processing Delay Fault detection Vehicle dynamics Load management

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Design of practical snake vehicle: articulated body mobile robot KR-II

Design of practical snake vehicle: articulated body mobile r...

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International conference on advanced Robotics (ICAR)

作者： S. Hirose A. Morishima S. Tukagosi T. Tsumaki H. Monobe Tokyo Institute of Technology Okayama Tokyo Japan Sagamihara Machinery Works Mitsubishi Heavy Industries Limited Sagamihara Kanagawa Japan

The characteristics and the applications of the articulated body mobile robot, 'Koryu (KR)', a mobile robot with a new style of articulated body is identified, and the construction of the newly developed 'Koryu-II (KR-II)' is discussed. KR-II takes the form of seven linked articulations and its total length is 3.3 m, and its total weight is 350 kg. KR-II introduces new mechanisms and control systems such as: easily detachable unified segments; self-contained driving system with wireless control; traction wheels attached on one side of the segment; long stroke vertical prismatic joint to cope with a steep inclination; robot hand driven by the coordination control of the body articulation; force sensor based on photodetective technology; and an analog bus system to simplify the electrical installation. Finally, the paper describes KR-II's fundamental results of experimental trials, to show the validity of it as a robot to move and operate in an unstructured environment.< >

关键词： Vehicles Mobile robots Robot kinematics Control systems Force control Wheels Robot sensing systems Construction industry Machinery Wireless sensor networks

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A multiagent system for intelligent material handling

A multiagent system for intelligent material handling

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International conference on advanced Robotics (ICAR)

作者： R. Bajcsy R. Paul Xiaoping Yun V. Kumar General Robotics and Active Sensory Perception (GRASP) Laboratory Department of Computer and Information Science University of Pennsylvania Philadelphia PA USA

The goal of the paper is to outline a multiagent robotic system employed in the task of material handling in an unstructured, indoor environment. In the research described, manipulators, observers, vehicles, sensors, and human operators are considered to be agents. Alternatively, an agent can be a general-purpose agent. Mobility is considered to be essential-if an agent is not mobile, it must be possible for it to 'piggy-back' on another agent which is mobile. In addition there is a central station which is stocked with a variety of additional sensors, means of illumination, special effectors or tools, that the agents can employ depending on the environment, task and the outcome of the execution of the task. Some possible applications of such a material handling system and examples of the tasks and environments are outlined.< >

关键词： Multiagent systems Intelligent systems Materials handling Intelligent sensors Intelligent robots Robot sensing systems Indoor environments Manipulators Vehicles sensor phenomena and characterization

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Exploratory procedures for material properties: the temperature perception

Exploratory procedures for material properties: the temperat...

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International conference on advanced Robotics (ICAR)

作者： M. Campos R. Bajcsy V. Kumar Department of Computer and Information Science GRASP Laboratory University of Pennsylvania Philadelphia PA USA

Any time there is a need to physically interact with the external world in an unstructured environment, a robotic system must be able to extract physical, geometrical, and substance properties of that environment. The authors use, and further define, the paradigm of exploratory procedures (EP's). The EP's are stereotypical motoric procedures executed by humans when exploring an object. They adapt these for use in the robotics domain. Among the many EP's, they concentrate on one specific case: the EP that returns the thermal property of an unknown object. They present a new approach for the design and modeling of thermal sensors for robotic applications. A model of one such sensor is developed and its validity is experimentally verified with different objects. Finally, an EP for acquiring the temperature property of an unknown object is described.< >

关键词： Material properties Temperature Robot sensing systems Thermal sensors Haptic interfaces Data mining Control systems Testing Physics computing Information science

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The advanced cockpit environment: computer image generation systems and flat panel displays

The advanced cockpit environment: computer image generation ...

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Telesystems conference

作者： A.L. Bridges SCI Systems Inc. Huntsville AL USA

Trends concerning real-time, high-quality airborne 3D computer image generation systems and flat panel displays are reviewed. It is pointed out that the rapid trend toward the use of full-color display devices and raster graphics image generation systems in the cockpit is in part due to advances in sensors, programmable graphics generators, and electrooptics. Although many newer display and control system technologies have yet to reach maturity for flight applications, the rate of improvement in recent years suggests many new technologies will overcome the present shortcomings during the 1995-2000 time frame. High-performance graphics engines, powerful floating point processors, and massively parallel graphics architectures will be used to increase the rendering speed, functionality, and reliability, while reducing power, space requirements, and cost of cockpit display processors. Flat panel displays will replace dedicated instruments and traditional cathode ray tubes in the cockpit and enhance maintainability, reliability, and crew-system performance.< >

关键词： Image generation Flat panel displays Computer displays Computer graphics Space technology Real time systems Image sensors sensor systems Electrooptic devices Control systems

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ROBOS: world modelling through an object system

ROBOS: world modelling through an object system

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International conference on advanced Robotics (ICAR)

作者： G.S. Guler Department of Computer Engineering Ege University Bornova Izmir Turkey

A self-contained object system for robotic applications is developed and implemented. The main feature of the system, named ROBOS (robotic object system), is its object-oriented configuration and its suitability for high level interfaces. The robotic environment is integrated to this object system by means of object lists together with a message handling mechanism. The term object is not confined to physical objects; a task, a motion trajectory or a sensor response are all treated as objects. The task objects are organized in a hierarchical way and the task sequences are represented by means of a new strategy, named constructive task representation. The system maintains a uniform strategy for object definition, irrespective of the type of the item to be defined. An object is referred by a name and it is stored in the system together with the related structures. The message handling module is the main tool for reasoning the environment and its objects. The user interface and interaction with application programs are also achieved by the message handler. The system is provided with a built-in planner to sequence the task objects. The whole system is implemented in a LISP environment on an IBM 3090 computer.< >

关键词： Object oriented modeling Robot programming Application software Robot sensing systems Artificial intelligence Intelligent robots Solid modeling Remuneration User interfaces Inference algorithms

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Bus systems

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sensors and Actuators, A: Physical 1990年第1-3期25卷 109-113页

作者： Henning, W. Siemens AG Munich Germany

sensor systems must be considered more and more as part of a complete automated system. They have to become system-capable and must therefore provide appropriate interfaces to allow for connection to higher control and processing computers. In this respect, digital bus-capable sensor interfaces are the solution for future applications. Today the development of bus systems for the individual hierarchical system layers is quite well advanced. In particular, 'open' interface solutions will gain an increasing market share, because only an open communication offers the flexibility to exchange the equipment or the components used for models from different manufacturers. This is a very important prerequisite for production technology. The best description of the structure and functioning of an open sensor interface is given by the reduced OSI (open system interconnection) reference structure.

关键词： sensors

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