Through the evaluation of advantages and limitations of 3D historic city models, this paper aims to analyze the contribution of those tools to the city history representation. One should overcome limitations such as i...
Through the evaluation of advantages and limitations of 3D historic city models, this paper aims to analyze the contribution of those tools to the city history representation. One should overcome limitations such as incomplete information, impediments to acknowledge hypotheses representations, intense labor requirements or difficulties to encourage a historical reflection. We argue that creative systems that are carefully planned towards history's thorough understanding are more effective than those applications which focus on the development of high quality images. Those issues are illustrated by the system prototype "Rio-H", which presents an alternative to communicate the history of Rio de Janeiro, Brazil.
作者：
Alfred L. GardnerJerry T. WarrenRobert France*Biological Survey Program
USGS Patuxent Wildlife Research Center National Museum of Natural History Washington D.C. 20560 U.S.A. † High Mountain Ecological Research Station-Finse c/o Biological Institute Box 1050 University of Oslo 0316 Oslo Norway email jerryt@ bio.uio.no ‡Harvard University Graduate School of Design 48 Quincy St. Cambridge MA 02138 U.S.A. email rfrance@gsd.harvard.edu
This paper presents an approach to new method for music composition with multi-agent system, which is a field of new research and offers vast possibilities for both scientific research and artistic expression. Propose...
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A novel algorithm to decode the Controller Area Network (CAN) frames in an automobile is presented. With didactic intentions and in the context of an industrial collaboration agreement, Artificial Neural Networks (ANN...
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ISBN:
(纸本)9781601320254
A novel algorithm to decode the Controller Area Network (CAN) frames in an automobile is presented. With didactic intentions and in the context of an industrial collaboration agreement, Artificial Neural Networks (ANN) are used to identify the relations among the diverse frames traveling in the CAN bus and the state of several electronic control modules connected to the network. Early results showed that the solution decodes all the CAN frames of the comfort fieldbus (i.e. dashboard, wipers, lights, doors, windows, seats, mirrors, climate control).
作者：
Dr. Roy L. StreitSince 1992
Dr. Streit has focused a significant amount of his energy to assignment problems in acoustic warfare data fusion systems. This work led him to the formulation of the PDD Principle a broadly useful theoretical method that enables the derivation of new classes of discrete-continuous estimation algorithms for solving assignment problems without requiring enumeration and pruning. In recognition of his outstanding work in this area Dr. Streit received the NAVSEA Scientist of the Year Award for 1997. Dr. Streit has also been pursuing avenues for analyzing the loss in broadband detection performance of an acoustic array in the presence of interferences. Because examining all possible separations between the signal and many interferers is infeasible he has proposed a Poisson process model for the number and location (s) of the interferers. In this same time period Dr. Streit has also been investigating issues in environmental modeling and localization by proposing a novel integral method for solving the bearings-only target motion analysis problem which enables a natural heuristic for compensating for mismatch between the model predictions and the real world. Most recently Dr. Streit has proposed the Numerical ACoustic Hull ARray (NACHAR) Project as a revolutionary and ambitious approach to hull array design. Its premise is that optimizing the detection capability of large hull arrays requires the full integration of hull sensor array and beamformer design processes. Because NACHAR crosses an unusual number of technical disciplines it involves researchers from several departments. The diversity of Dr. Streif s technical background makes him uniquely suited to lead the project Dr. Streifs truly impressive scientific achievements are complemented by a noteworthy list of professional activities that accentuate his value to Division Newport and the Navy. He represents the United States in The Technical Cooperation Program Maritime Activities Panel 9 (Sonar Technology) and participates in the Division New
for his significant engineering research and development in sonar array research and acoustic transient signals as set forth in the following
for his significant engineering research and development in sonar array research and acoustic transient signals as set forth in the following
Networked Control Systems ( NCS ) are a variation of traditional point-to-point control systems where sensors and actuators may be physically distributed and a serial common-bus communication network is used to exchan...
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Networked Control Systems ( NCS ) are a variation of traditional point-to-point control systems where sensors and actuators may be physically distributed and a serial common-bus communication network is used to exchange system information and control signals. Because all components use the same communication network, network-induced delays could make the system stochastic. The Quality of Control ( QoC ) of each closed-loop system in a NCS is strongly affected by the network-induced delay produced by sensors and control signals. Controller Area Network ( CAN ) is a popular real-time fieldbus used for small-scale distributed environments such as automobiles. In CAN the delay exhibits a stochastic behavior and varies according to the network load. Since QoC is affected by delays, designing and evaluating a controller must take into account the effect of network-induced delays. This paper illustrates three models that play the role of classifiers and estimators of the network-induced delays; the models can estimate the network load and predict future time delay values. The models were built following a statistical approach using a continuous Hidden Markov Model, a black-box state space modeling approach using Recursive Multi-Layer Perceptrons, and a histrogram-based approach. Each approach was trained/tested using experimental data taken from a real CAN system with excellent results.
作者：
Elisa Garay‐VargasFausto E. Rodriguez‐ManzoProgram of Graduate Studies in Design
CyAD ‐ Universidad Autónoma Metropolitana Av. San Pablo 180 Edificio D 101 Col. Reynosa Tamaulipas Delegacion Azcapotzalco 02200 Mexico D.F. Mexico elisagaray@*** Departamento de Procesos y Tecnicas
CyAD Universidad Autonoma Metropolitana‐Azcapotzalco Av. San Pablo 180 Edificio H‐PB Col. Reynosa Tamaulipas Delegacion Azcapotzalco 02200 Mexico D.F. Mexico rfme@correo.azc.uam.mx
The acoustic quality of architectural spaces has been related directly with the reverberation phenomenon, in order to understand more about sound in architecture, this proposal tries to conclude how diffusion acts on ...
The acoustic quality of architectural spaces has been related directly with the reverberation phenomenon, in order to understand more about sound in architecture, this proposal tries to conclude how diffusion acts on the reverberation time. The fact that architects deal with absorption coefficients and change the reverberation time by playing and designing with materials, opens a door to the possibility of new ways of architectural design, knowing how simple or complex and even natural diffusion surfaces will act in space. Several examples of the use of diffusion and reverberation in architectural spaces can be found in buildings like the Jewish Museum from Daniel Libeskind or the Therme Vals from Peter Zumthor, the use of big surfaces of concrete in the first and uneven surfaces in the second, transform each of these places in one with very interesting sound qualities. To create spaces like these we can take diffusion as a design argument but, How will certain diffusive surfaces influence on the reverberation time of an architectural space? To answer this question it is necessary to experiment with scale models measuring the reverberation time, and not the diffusion itself.
Recently the science of acoustics has been reconsidered and valued more than just a tool concerning physics, telecommunications, and music. It is now an important topic of research for the acoustic comfort of places w...
Recently the science of acoustics has been reconsidered and valued more than just a tool concerning physics, telecommunications, and music. It is now an important topic of research for the acoustic comfort of places where people work and live, and it is also considered as an essential issue for the physical and mental health of human beings. Sound has to be integrated as a design concept in architecture, but architects need tools for understanding more the way to reach not only good acoustics but also good architectural design. It has been proven that physical scale models are very useful for the prediction of the acoustical behaviour of rooms, therefore this process is analyzed and studied at the Acoustic design and Analysis Laboratory of the UAM‐Azcapotzalco in Mexico City, in order to promote further investigations that provide useful data for the design of architectural spaces as well as the design of sound control devices. This paper shows the work of a master degree thesis where the main objective is to present the measurements of reverberation time taken in an existing room compared with those taken in the physical scale model of the same room.
Networked Control Systems (NCS) are a variation of traditional pointto- point control systems where sensors and actuators may be physically distributed and a serial common-bus communication network is used to exchange...
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ISBN:
(纸本)9783902661340
Networked Control Systems (NCS) are a variation of traditional pointto- point control systems where sensors and actuators may be physically distributed and a serial common-bus communication network is used to exchange system information and control signals. Because all components use the same communication network, network-induced delays could make the system stochastic. The Quality of Control (QoC) of each closed-loop system in a NCS is strongly affected by the network-induced delay produced by sensors and control signals. Controller Area Network (CAN) is a popular real-time field-bus used for smallscale distributed environments such as automobiles. In CAN the delay exhibits a stochastic behavior and varies according to the network load. Since QoC is affected by delays, designing and evaluating a controller must take into account the effect of network-induced delays. This paper illustrates three models that play the role of classifiers and estimators of the network-induced delays;the models can estimate the network load and predict future time delay values. The models were built following a statistical approach using a continuous Hidden Markov Model, a blackbox state space modeling approach using Recursive Multi-Layer Perceptrons, and a histrogram-based approach. Each approach was trained/tested using experimental data taken from a real CAN system with excellent results.
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