Truncated multiplication can be used to significantly reduce the power dissipation for applications that do not require correctly-rounded results. This paper presents an efficient method for truncated multiplication c...
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Truncated multiplication can be used to significantly reduce the power dissipation for applications that do not require correctly-rounded results. This paper presents an efficient method for truncated multiplication called hybrid-correction truncation that utilizes the advantages of two previous methods to obtain lower average and maximum absolute error. Comparisons are presented contrasting power, area, and delay for all three methods compared to standard parallel multipliers. Estimates indicate that hybrid truncated multipliers dissipate slightly less power and consume slightly less area than previous methods for truncated multiplication. In addition, utilization of the hybrid truncation method can provide a method for altering the implementation within certain limits to meet a given precision.
作者：
C.M. KaasJ.E. StineVLSI Computer Architecture
Arithmetic and CAD Research Laboratory Department of Electrical and Computer Engineering Illinois Institute of Technology Chicago IL USA
Interval arithmetic provides an efficient method for monitoring and controlling errors in numerical calculations. However, existing software packages for interval arithmetic are often too slow for numerically intensiv...
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Interval arithmetic provides an efficient method for monitoring and controlling errors in numerical calculations. However, existing software packages for interval arithmetic are often too slow for numerically intensive calculations. This paper presents the design of a comparator that performs either interval or two's complement/floating-point comparisons. This comparator requires only slightly more area than a conventional floating point comparator, and provides a significant performance improvement over software implementations of interval comparisons. Both serial and parallel designs are examined and the results are implemented in AMI 0.60 /spl mu/m technology.
When confronted with a control problem for a complicated physical process, a control engineer generally follows a relatively systematic design procedure. In this paper we design an on-line controller which is able to ...
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When confronted with a control problem for a complicated physical process, a control engineer generally follows a relatively systematic design procedure. In this paper we design an on-line controller which is able to modify and adapt the rule base of the system with just only qualitative knowledge about the plant to be controlled. In our example, the system is an helicopter, and the objective is to control the altitude of the helicopter, when the mass of the system change, or other parameters defining the helicopter has been modified.
This paper describes a hierarchical fuzzy steering controller approach to local navigation of an autonomous sensor equipped mobile robots. Two goals are considered simultaneously: obstacle avoidance, so that the robot...
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This paper describes a hierarchical fuzzy steering controller approach to local navigation of an autonomous sensor equipped mobile robots. Two goals are considered simultaneously: obstacle avoidance, so that the robot is piloted safely in an unknown environment; and reaching an target point. A two-step approach to build a fuzzy system is presented. In the first stage signals are processed by conventional methods to get an output vector indicating the direction and the closeness of obstacles around. Stage two is a basic task steering controller, that is based on fuzzy logic. The modular structure of the first stage allows modifications on the robot. So there is no need for a redesign of the controller's architecture, when the controller is used in different applications. Adaptation to a new task is done simply by adjusting the controller to other conditions. Then the robustness of this controller is demonstrated in simulations by means of erroneous signals of the sensor modules. Finally the controller is used in combination with another basic task controller for 'Reaching an Aiming Point'. In a higher level a controller ascertains priority of the controllers and manages the resulting steering commands.
The paper describes the implementation of a software/hardware (Sw/Hw) retina-like preprocessor designed for the study of bio-inspired visual processing schemes, and for experimentation in the development of a cortical...
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The paper describes the implementation of a software/hardware (Sw/Hw) retina-like preprocessor designed for the study of bio-inspired visual processing schemes, and for experimentation in the development of a cortical visual neuro-prosthesis. The goal is to obtain, in the near future, an integrated artificial retina for a visual neuro-prosthesis prototype able to stimulate efficiently an array of intra-cortical implanted microelectrodes. The Sw/Hw platform presented is highly programmable and reconfigurable as required for experimentation, providing real-time video processing and neuromorphic stimulation. But its implementation is also devised to be finally mapped into fully portable hardware, particularized for each implanted blind individual.
Immersive virtual environments (VEs) offer interactive, real-time visualization capabilities for engineers, architects, and scientists. This paper presents Virtual-SAP, an immersive VE application allowing users to as...
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Immersive virtual environments (VEs) offer interactive, real-time visualization capabilities for engineers, architects, and scientists. This paper presents Virtual-SAP, an immersive VE application allowing users to assess building structures and their response to various environmental conditions through an interactive design-build-test-redesign cycle. Virtual-SAP has three distinct user interfaces that support its use with a high-end, multi-tracker VE system, with a low-cost portable VE system, or on the desktop. Two of these interfaces have been proven highly usable in user testing, and the third will be tested soon. Virtual-SAP is being used for both research and education.
In this research is applied simulation modeling of queuing systems with the help of vector quantization. A technique for adjusting the boundaries between classes with vector quantization is suggested. With this techni...
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In this research is applied simulation modeling of queuing systems with the help of vector quantization. A technique for adjusting the boundaries between classes with vector quantization is suggested. With this technique is determined the function of density distribution of the input flow. The implementation of suggested approach for simple Jackson queuing system is shown.
The dispensing mechanism of active code is a key technology in an active network. Conventional capsule and programmable switch approaches have their own shortcomings. The DCCAN(distributed code caching for active netw...
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The dispensing mechanism of active code is a key technology in an active network. Conventional capsule and programmable switch approaches have their own shortcomings. The DCCAN(distributed code caching for active network) mechanism presented in this paper overcomes these shortcomings. In this paper, capsule and programmable switch approaches are introduced, and their shortcomings are analyzed. The principle of the DCCAN mechanism is described. The theory analysis in transmit width based on the DCCAN mechanism and capsule approach are described. The theory analysis shows that the DCCAN mechanism has many good characteristics and can improve the efficiency of an active network. Key factors which affect the transmit width based on the DCCAN mechanism are discussed. The using condition of the DCCAN mechanism is also discussed.
The U.S. department of Defense (DoD) has mandated the development of architectures to support the acquisition of systems that are interoperable and will meet the needs of military coalitions. This paper provides a gen...
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We describe a collaborative project between an HCI team and an internationally known Japanese artist, based in New York, who was artist-in-residence with the group in the UK. The collaboration resulted in a new perfor...
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We describe a collaborative project between an HCI team and an internationally known Japanese artist, based in New York, who was artist-in-residence with the group in the UK. The collaboration resulted in a new performance art work and a new interactive instrument. The research included a full study of the process of collaboration and innovation. We describe the work that was created, the interactive instrument developed and illustrates its use in a performance.
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