Researches about the human brain modelling makes possible a new design of control systems for complex processes. This paper presents a structural/functional analysis of an intelligent autonomous system based on the hu...
详细信息
Researches about the human brain modelling makes possible a new design of control systems for complex processes. This paper presents a structural/functional analysis of an intelligent autonomous system based on the human intelligent control system. Information processing in brain is presented at two levels of organisations: micro-intelligence and macro-intelligence. The proposed architecture RCS for brain consists of a hierarchical structure of processing modules centered on world-model modules.
For Part I see ibid., pp.116-9 (2000). This paper proposes a new approach to circuit simulation, where components are treated equally regardless of their type. The benefits gained through this approach is outlined in ...
详细信息
For Part I see ibid., pp.116-9 (2000). This paper proposes a new approach to circuit simulation, where components are treated equally regardless of their type. The benefits gained through this approach is outlined in details. More specifically, this technique allows simulation of analog circuits from system-level point of view to a more sophisticated design where the complete topology of the circuit is known. A unified simulation algorithm has been developed for small size analog and digital circuits. Our experimental results show that not only unified simulation is feasible, it has better speed compared to traditional simulation techniques.
human performance modeling (HPM) tools have recently been developed to accurately predict human workload and environmental performance associated with procedural changes. Often, these changes have unforeseen human per...
详细信息
human performance modeling (HPM) tools have recently been developed to accurately predict human workload and environmental performance associated with procedural changes. Often, these changes have unforeseen human performance effects. One such procedural rule change is the concept of mature free flight expected by the year 2025. Free flight is a Federal Aviation Administration (FAA) system capacity strategic goal aimed at reducing flight times, crew resources, maintenance, and fuel costs by reducing rigid airway structures and in-trail spacing. An evaluation of predicted workload effects and aircraft performance associated with current day and free flight operations was performed using two integrated human performance models, air man-machine integration design and analysis system (Air MIDAS) and the integrated performance modeling environment (IPME). In analyses of a common scenario, both tools revealed increases in workload from current day to free flight operations, however the models provided different performance profile predictions depending on the operator's role in the system change. These differences were in the components that made up the overall workload predictions. Some contextual evidence suggested that the proximity of the aircraft as measured by the closest point of approach (CPA) did not impact workload of the simulated operators as demonstrated by the simulated CPA distances under current day operations as compared with free flight operations. This provides evidence that more focus needs to be brought to the effects of context on the workload of the virtual human operator of the National Airspace System (NAS). A validation effort of these contextual findings with human-in-the-loop data is anticipated and required prior to drawing any definite conclusions.
A learning machine envisioned for functioning in the physical world should be reasonably easy to implement. Our daily lives and experiences suggest that human-like learning systems are better suited for functioning in...
详细信息
A learning machine envisioned for functioning in the physical world should be reasonably easy to implement. Our daily lives and experiences suggest that human-like learning systems are better suited for functioning in hard-to-navigate environments because of their high degree of flexibility. The paper applies the biofunctional model of human learning to the design and implementation of a learning machine that is effective in navigating complex environments and relatively easy to design using classifier systems. We portray in this case study how a fuzzy logic controller helps in making the system more conforming to the biofunctional model. The result is vast improvements to the learning rate and the overall efficiency of the whole system.
The paper addresses the problem of the cycle-based simulation performance of synchronous digital systems modeled by High-Level Decision Diagrams (DDs). A new class of DD representation, called Register-Oriented DDs (R...
详细信息
The paper addresses the problem of the cycle-based simulation performance of synchronous digital systems modeled by High-Level Decision Diagrams (DDs). A new class of DD representation, called Register-Oriented DDs (RODD) is introduced. The RODD model appears to be an efficient and compact representation of the system behavior for the high-level cycle simulation. In order to fully exploit the advantages of RODDs a new simulation algorithm, which is a combination of cycle-based forward event-driven and recursive back-tracing techniques is proposed. The characteristics of the simulation algorithms used to efficiently execute the evaluation of the DD network are discussed. Further the experimental results carried out on the real case examples demonstrating the gain in simulation performance of the proposed approach and a comparison of four cycle-based simulation algorithms are presented. Additionally, a comparison with the commercial event-driven and cycle-based HDL simulation tools is included.
The paper overviews the development of a self-learning computing chip in 0.18 micron copper technology. This chip supercedes, in its capabilities, present micro-computing paradigms (micro-processors, micro-controllers...
详细信息
The paper overviews the development of a self-learning computing chip in 0.18 micron copper technology. This chip supercedes, in its capabilities, present micro-computing paradigms (micro-processors, micro-controllers, and DSPs) in the application domains of process identification, modeling, prediction, and real-time control. In particular, specific domains of targeted potential applications include: (i) Nano-level on-line bio-probing and actuation, (ii) image analysis and feature extraction, (iii) channel equalization for high speed mobile communications, (iv) inertial navigation sensor fusion, and network management for routers.
human body-product interaction is, next to clothes, most intensive and prolonged in beds and seats. In ergonomics this is a classical antropometric issue which emphasizes on standards for sizes which accommodate diffe...
human body-product interaction is, next to clothes, most intensive and prolonged in beds and seats. In ergonomics this is a classical antropometric issue which emphasizes on standards for sizes which accommodate different body measures. However, biomechanics of lying and seating got less attention. As an introduction to the papers in this symposium three basic biomechanical models will be described. The first model describes how pressure and shear on the ischial tuberosities is related to the position of seat and backrest. The choice of foam, fluid or gas for body support is another basic issue for minimization of pressure and shear. The next biomechanical topic is load on internal body structures in (quasi-)static postures. This issue is of great interest because of related neck, low back and other complaints. The model on transfer of lumbosacral load to iliac bones and legs explains that in sitting, even with the use of backrest and armrests, muscles in the abdominal wall must be continuous active to form a deep muscle corset for stability of joints in the lumbopelvic region. One conclusion is, that leg crossing is functional and should be implemented in *** the help of biomechanics and related verification measurements a list of design criteria is formulated. Often body support contravenes with basic biomechanical design criteria. Examples are office chairs, cockpit chairs and wheel chairs but also (hospital) beds.
Memory consumption is an important metric during software synthesis from block-diagram specifications of DSP applications. Conventionally, no assumption is made about when, during the execution of a functional block (...
详细信息
Memory consumption is an important metric during software synthesis from block-diagram specifications of DSP applications. Conventionally, no assumption is made about when, during the execution of a functional block (actor), the associated data values (tokens) are actually consumed and produced. However, we show in this paper that it is possible to concisely and precisely capture key properties pertaining to the relative times at which tokens are produced and consumed by an actor. We show this by introducing the consumed-before-produced (CBP) parameter, which provides a general method for characterizing the token transfer of an actor. Good bounds on the CBP parameter can aid a block-diagram compiler in performing more aggressive optimizations for reducing buffer sizes on the edges between actors. We formally define the CBP parameter; derive some useful properties of this parameter; illustrate how the value of the parameter can be derived by examining in derail the multi-rate FIR filtering operation; and examine CBP parameterizations for several other practical DSP actors.
Smart antennas with adaptive beamforming and beamsteering are required to enhance the overall system performance of future communication and navigation systems. The generation of multiple beams, side lobe attenuation ...
详细信息
Smart antennas with adaptive beamforming and beamsteering are required to enhance the overall system performance of future communication and navigation systems. The generation of multiple beams, side lobe attenuation and definite nulling are important features to reduce interference and to facilitate high-quality communication channels or to improve the accuracy of navigation data. This paper describes the design and fabrication of a compact C-band antenna with digital beamforming (DBF) as a breadboard model. It uses a 5/spl times/5 array of slot-coupled microstrip patches with RHCP that form a multilayer structure together with the networks for calibration and IQ distribution. The complete antenna was tested with different parameter settings and the measurement results demonstrate its excellent and versatile characteristics.
暂无评论