In this paper, we introduce a new algorithm for modelling 3-D objects using information gathered from both active and passive sensing mechanisms. Construction of the structural description of a 3-D object is composed ...
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In this paper, we introduce a new algorithm for modelling 3-D objects using information gathered from both active and passive sensing mechanisms. Construction of the structural description of a 3-D object is composed of two stages: (i) The visible surface orientation and partial structure are first inferred from a set of single views, and (ii) the partial surface structures inferred from different viewpoints are integrated to complete the 3-D structural description of the object. In the first stage, an active stripe coding technique is used which projects spatially modulated patterns to encode the objects surfaces for analysis. The visible surface orientation is inferred using a constraint satisfaction process based upon the observed orientation of the projected patterns. The visible surface structure is recovered through integrating a dense orientation map. In the second stage, an iterative construction/refinement scheme is used which exploits both passive and active sensing for representing the object surfaces. The bounding volume description of the object is first constructed using multiple occluding contours which are acquired through passive sensing. The bounding volume is then refined using the partial surface structures inferred from active sensing. The final surface structure is recorded in a memory efficient data structure where the surface contours in a set of parallel planar cross sections are recorded. We expect this approach to be widely applicable in the field of robotics, geometric modeling and factory automation.
The LCSM simulation program is an easy-to-use tool for taking a 'quick-look' at the preliminary design performance of almost any control system. The functional block diagram (FBD) of the system to be modeled i...
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The LCSM simulation program is an easy-to-use tool for taking a 'quick-look' at the preliminary design performance of almost any control system. The functional block diagram (FBD) of the system to be modeled is easily translated into tabular data which are accepted by LCSM via the keyboard and then saved to disk. With the LCSM general model structure, which is applicable to any linear system, transient response of the system, as well as the components, to several simulataneous inputs can be generated. The numerical integration algorithm is absolutely stable. The frequency response computation is based on the continuous model without discretization error. The frequency response for any point-to-point transmission (e. g. input-output, open-loop) is available. LCSM plots both response data types with multiple plots per grid and saves both data and plots to disk. Several examples of control system analysis are presented to demonstrate the LCSM features and capabilities. LCSM runs on the APPLE ii series of microcomputers under DOS 3. 3 with 64K RAM and two disk drives.
A simulation model is used to analyze the effects of various factors on the performance of a complex manufacturing system. The system under study is a large circuit board manufacturing facility. There, circuit boards ...
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ISBN:
(纸本)0911801111
A simulation model is used to analyze the effects of various factors on the performance of a complex manufacturing system. The system under study is a large circuit board manufacturing facility. There, circuit boards are assembled and tested on a wide variety of automated machines and manual workstations. The simulation model, written in the SLAM ii language, is highly detailed in the manner in which processes are modeled. This becomes especially important in modeling circuit board testing where boards which fail are repaired and recirculated through the test stations. Detailed modeling also allows for numerous process routings among the different product types. The model possesses a demonstrated accuracy in its portrayal of the real-world situation.
Systems which combine the timing requirements of real-time processing with the complexity of knowledge processing are investigated. In such real-time environments it cannot be guaranteed that all processes meet their ...
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Systems which combine the timing requirements of real-time processing with the complexity of knowledge processing are investigated. In such real-time environments it cannot be guaranteed that all processes meet their deadlines but is possible to isolate a subset of critical processes which must meet their deadlines. Such systems are designated semihard real-time control systems. The behavior of critical processes in terms of resource utilization is known in advance but there are noncritical processes whose behavior is subject to change. Though priority scheduling is used, the execution times of critical processes must be determined by a nondeterministic analysis which takes into account contention for system resources with noncritical processes. A subset of system resources does not allow preemption;for example, a process running into a critical section must complete its function. The structure and the performance of a class of such systems, namely, the data acquisition and analysis systems, are analyzed in case of procedure-oriented as well as message-oriented design. A methodology for system modeling and the approximation needed are discussed.
The following topics are dealt with: detailed routing;VLSI testing in practice;tool integration;hardware speedup of placement;built-in-self test;module generation and layout synthesis;electrical simulation;design for ...
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ISBN:
(纸本)0818607440
The following topics are dealt with: detailed routing;VLSI testing in practice;tool integration;hardware speedup of placement;built-in-self test;module generation and layout synthesis;electrical simulation;design for testability tools;behavior synthesis;timing analysis;automatic test pattern generation;rule-based synthesis;simulation on multiprocessors;gridless routing;data path and state machine synthesis;statistical design;global routing;control path synthesis;interconnect modeling;array testing;verification systems;gate matrix layout;fault simulation;minimization techniques;system concepts;call placement techniques;hardware accelerators;circuit extraction and DRC;new theory for place and route;IC design systems;module generators;system aspects and VLSI placement;process and device simulation;symbolic layout;generation and evaluation;and CAD for process design. 115 papers were presented, all of which are published in full in the present proceedings.
A nonlinear feedback controller for chemical reaction dynamic systems is examined in which the control action is a function of the deviation of the reaction rate from steady state. The motivations for this controller ...
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A nonlinear feedback controller for chemical reaction dynamic systems is examined in which the control action is a function of the deviation of the reaction rate from steady state. The motivations for this controller are (i) the finding that the reaction rate sensitivity to composition and temperature deviations is closely associated with the slow or unstable dynamic modes for the reaction systems studied to date; (ii) the controller nonlinearity mirrors the principal process nonlinearity; and (iii) such a control law is intuitively meaningful. In this paper, we develop the controller and propose a nonlinear analysis method for an idealized model of the continuous stirred tank reactor.
This paper deals with a method for the texture segmentation or classification using two-dimensional AR model. We propose a new distance measure which shows the statistical difference between two textures based on Kull...
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This paper deals with a method for the texture segmentation or classification using two-dimensional AR model. We propose a new distance measure which shows the statistical difference between two textures based on Kullback information. Finally, the effectiveness of the present algorithm is shown by numerical examples.
In this paper we investigate systems which combine the timing requirements of real-time processing with the complexity of knowledge processing. In such real-time environments it cannot be guaranteed that all processes...
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In this paper we investigate systems which combine the timing requirements of real-time processing with the complexity of knowledge processing. In such real-time environments it cannot be guaranteed that all processes meet their deadlines but it is possible to isolate a subset of critical processes which must meet their deadlines. We call such systems semi-hard real-time control systems. The behavior of critical processes in terms of resource utilization is known in advance but there are non-critical processes whose behavior is subject to change. Though priority scheduling is used, the execution times of critical processes has to be determined by a non-deterministic analysis which takes into account contention for system resources with non-critical processes. A subset of system resources do not allow preemption, for example a process running into a critical section must complete its function. The structure and the performance of a class of such systems, namely the data acquisition and analysis systems are analyzed in case of procedure oriented as well as in the case of message oriented design. A methodology for system modeling and the approximations needed are discussed. Even in the simple case of a system with only one critical process the analysis is non-trivial; due to priority scheduling the system model is non-separable hence does not have a product form solution.
The personal computer caused a revolution in the consumer and business market. With the advent of processcontrol oriented software and proper interfaces between the personal computer and the process, the beginning of...
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ISBN:
(纸本)087664891X
The personal computer caused a revolution in the consumer and business market. With the advent of processcontrol oriented software and proper interfaces between the personal computer and the process, the beginning of a revolution was underway in the industrial market place. There is particular applicability in the industrial segment where there is a need to simplify, quantify, and document process activities. With processdata on the desktop, there are important activities that can be performed. A few examples are customized reports, archiving of data, spreadsheet analysis, trending of data, processmodeling, and statistical analysis.
Most of a manufacturing resources planning (MRP) ii project is not software at all. Much of the other work can be done before and during the selection process. Planning and cost/benefit analysis are done in advance. D...
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ISBN:
(纸本)0935406727
Most of a manufacturing resources planning (MRP) ii project is not software at all. Much of the other work can be done before and during the selection process. Planning and cost/benefit analysis are done in advance. Doing all of the above is more cost-effective dollar-for-dollar than just software and it simplifies selection and keeps the process on track. The function/features trap should not bog one down. One must go through the important vendor qualifiers first. One must understand what motivates software vendors and plan your strategy accordingly. One must use the conference room pilot to complete the evaluation and introduce the system into your firm.
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