During the last decade, collaborative commerce and human-centric systems concepts have been applied in several enterprise information systems. Many researchers have studied, developed and proposed architectures for su...
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ISBN:
(纸本)0955301807
During the last decade, collaborative commerce and human-centric systems concepts have been applied in several enterprise information systems. Many researchers have studied, developed and proposed architectures for such systems. In order to validate and verify the systems' architectures, researchers use various types of modeling and analysis techniques available. One well-recognized technique is WorkFlow-nets (AT-nets), which is based on Petri Nets. WF-nets focus on control flow and provide a powerful analysis mechanism to verify the correctness of workflow procedures. this paper discusses a human centered collaborative system (HCCS) that has a Web-based architecture and pays special attention to collaboration and human-centric issues. the system is modeled using Petri nets and workflow nets. the paper then introduces Symbolized workflow-nets (SWF-nets) which employ symbolized places, transitions and arcs to illustrate the complicated processes more effectively. Next, it presents an example, a college admission system, as a case study that can be implemented in the HCCS environment. We model the admission processes using SWF-nets to illustrate the validation and verification of the HCCS architecture.
Dynamics and globalization of modern markets force the business integration and building of various collaborative business structures (e.g., supply chains). the issues of modeling and optimization of such complex busi...
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the Java messaging service (JMS) is a means to organize communication among distributed applications according to the publish/subscribe principle. If the subscribers install filter rules on the JMS server, JMS can be ...
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ISBN:
(纸本)0955301807
the Java messaging service (JMS) is a means to organize communication among distributed applications according to the publish/subscribe principle. If the subscribers install filter rules on the JMS server, JMS can be used as a message routing platform, but it is not clear whether its message throughput is sufficiently high to support large-scale systems. In this paper, we investigate the capacity of the high performance JMS server implementation SunOneMQ by Sun Microsystems. In contrast to other studies, we focus on the message throughput in the presence of filters and show that filtering reduces the performance significantly. We also present a model that describes the service time for a single message depending on the number of installed filters and validate it by measurements. this model helps to forecast the systemthroughput for specific application scenarios.
this paper describes generic multi-agent systems architecture for an urban driving advisory system. this architecture is described as composed of basic role-oriented processes communicating though primitive interactio...
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ISBN:
(纸本)0955301807
this paper describes generic multi-agent systems architecture for an urban driving advisory system. this architecture is described as composed of basic role-oriented processes communicating though primitive interaction protocols. the architecture is aimed to provide an enabling communications framework upon which multi-agent system models can be organized and built to be used for an simulation of an urban map and to estimate the traffic behavior (to provide information about the best routes). the paper presents a hierarchical routing strategy for an Urban Driving Advisory system (UDAS), based on agent technology. UDAS assists the drivers to get the desired destination taking into account the current situation of traffic characteristics. It gives the estimated arrival time and the corresponding distance between a start and an arrival point. the necessary information is obtained from a real-time traffic control system (RTCS). the drivers could consult the advisory system using a variety of devices like mobile phones. the information given by the advisory system has the form of predefined short messages.
this paper presents details of an implementation of a computer simulation for the Target Motion Analysis problem where the error of time-delay measurements derived from passively sensed transients is modelled using a ...
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ISBN:
(纸本)0955301807
this paper presents details of an implementation of a computer simulation for the Target Motion Analysis problem where the error of time-delay measurements derived from passively sensed transients is modelled using a Gaussian-mixture probability density function. In order to improve accuracy of the simulation results, a pseudo-random number generator based on shift-register operations was implemented and compared to the standard C++ random number generator. Von Neumann's accepting-rejection method was used to generate the required non-uniform distribution function. the model was validated and its performance evaluated.
this paper presents a new arithmetic architecture hierarchically optimized for implementing modular exponentiation in ASIC. We combine a new version of high radix Montgomery multiplication algorithm with a super-pipel...
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ISBN:
(纸本)0955301807
this paper presents a new arithmetic architecture hierarchically optimized for implementing modular exponentiation in ASIC. We combine a new version of high radix Montgomery multiplication algorithm with a super-pipeline design. Withthis algorithm, modular exponentiation (ME) can be decomposed into a series of primitive operation (PO) matrixes. All the POs are scheduled on the pipeline by employing column-sharing strategy, and inside the PO the partial results are compressed first by Wallace tree to assure only one carry propagation in the critical path. We also investigates speed/area tradeoffs using a 0.18um library, and gets that the ratio of the increasing in speed to the extra area used decreases as radix length k steps up from 2 to 64. A ME coprocessor SEA-II with k 32 was fabricated, with 140 MHz clock, a decryption rate of 6353 Kb/s can be achieved for 1024-bit RSA.
there are many web-based applications such as XML content-based Filtering system etc. over the Internet. XML messages stream in and filter engine decide which users have potential interest based on their known require...
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ISBN:
(纸本)0769524664
there are many web-based applications such as XML content-based Filtering system etc. over the Internet. XML messages stream in and filter engine decide which users have potential interest based on their known requirements. However, when we process thousands of XPaths against fast XML streams, the limited main memory requirements become the bottleneck for the filter engine. We noticed that the uncertain factors in XPath expressions might lead to exponential complexity in search space. thus, this paper proposes a novel method for XML filtering to solve the computational problem. We define a novel binary operation "product" of automata to diminish the uncertain factors thus reducing the search space. then, we give the construction algorithms for DTD automaton and automaton product respectively. Finally, we analyze the complexity of the optimizing process and also validate the method in our experimental system.
the number of positron emission tomography (PET) centers based on proton cyclotron is rapidly growing nowadays worldwide. It actually requests for simple, reliable and cheap proton cyclotron of energy 10-20 MeV to be ...
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the number of positron emission tomography (PET) centers based on proton cyclotron is rapidly growing nowadays worldwide. It actually requests for simple, reliable and cheap proton cyclotron of energy 10-20 MeV to be designed for mass installations. Normally the magnet system for PET cyclotron is made with iron and copper coils. Although the some optimization of conventional warm magnet is possible, the another approach could be the magnet system based on permanent magnet, aiming the cost saving due to no needs of electric power during cyclotron life time. the permanent magnet system for 10 MeV PET cyclotron was designed, manufactured and measured. the present paper describes the cyclotron permanent magnet system as well as beam trajectory analysis in measured magnetic fields and RF system design.
Perfection of adjustable-speed electric drive systems is,able withthe aid of adaptation of all components, that they include, to each other. the solving of the task of based choosing of serial common-industrial async...
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ISBN:
(纸本)0955301807
Perfection of adjustable-speed electric drive systems is,able withthe aid of adaptation of all components, that they include, to each other. the solving of the task of based choosing of serial common-industrial asynchronous induction machine with using of complex mathematical models that include mathematical models of all components of electric drive is offered. On base of this models offered product DIMASDrive is created. the highest level of the program complex is automatized designing of special(optimized) asynchronous induction machines, that take into account significant features of operation of this machines in adjustable speed electric drive system. At this, the reducing till 50% of cost, dimensions, weight of asynchronous induction machine as composite part of adjustable speed electric drive system is reaching. Junction to producing of optimized induction machines is not connected for producer with high expenses, because constructive changes in compare to serial common industrial induction machine concerns just the stator wind of induction machine.
Intelligent video surveillance (IVS) systems are based on the recent development of so called embedded smart cameras. Delivering a good service quality in IVS usually results in a higher level of computing activity an...
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ISBN:
(纸本)0769524664
Intelligent video surveillance (IVS) systems are based on the recent development of so called embedded smart cameras. Delivering a good service quality in IVS usually results in a higher level of computing activity and therefore in increased power consumption. this work presents PoQoS, a novel approach that aims in maximizing the service quality (i.e., the number of IVS-services and their QoS) while minimizing the system's power consumption. PoQoS enables power-aware reconfiguration of services and hardware resources in distributed logical clusters of embedded smart cameras. In order to find optimal camera configurations during operation, PoQoS integrates PoSeGA, an online genetic multi-criterion optimization algorithm. A configuration manager properly selects among optimized camera configurations and consequently initializes intra-camera or intra-cluster power-aware reconfiguration with respect to application- and situation-specific context. the evaluation of PoQoS on the PoQoCam, a power-efficient embedded smart camera platform, shows the feasibility of the presented approach.
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