Both scenario and sequence diagram are effective models for specifying behaviours of the target systems. Scenarios can be used for requirements elicitation in the requirements definition. Sequence diagrams can be used...
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作者：
Xu, JiaYork Univ
Dept Elect Engn & Comp Sci Toronto ON M3J 2R7 Canada
In this paper, we introduce a new method for effectively handling process underruns and overruns. the method computes a "latest-start-time schedule" for uncompleted periodic processes in which the beginning ...
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ISBN:
(纸本)9781479922802
In this paper, we introduce a new method for effectively handling process underruns and overruns. the method computes a "latest-start-time schedule" for uncompleted periodic processes in which the beginning of the time slot of each uncompleted process is the "latest start time" for that process. At run-time, a run-time scheduling method uses the latest start times and the order of the end times of the time slots of the processes in the latest-start-time schedule, to handle process underruns and overruns while scheduling the processes. Withthis method, the only times at which a process is interrupted is when its deadline has expired, or when the latest start time of another process has been reached. Processes which overrun, are able to utilize any spare processor capacity in the system, including any additional unused processor capacity made available at run-time by process underruns, to maximize their chances of still meeting deadlines despite overrunning. the method thus increases both system utilization and robustness in the presence of inaccurate estimates of the worst-case computations of the real-time processes, while simultaneously satisfying important constraints and dependencies, such as offsets, release times, precedence relations, and exclusion relations.
In order to solve the problem that Camera Link standard interface used by the current industrial camera and image acquisition card could be realized only by making use of special integrated circuit, field programmable...
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In order to solve a series questions at present existing in machining technology of the disc with complex shape such as long process flow, great affects among working procedures and high cost, according to the outline...
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ISBN:
(纸本)9781424452668
In order to solve a series questions at present existing in machining technology of the disc with complex shape such as long process flow, great affects among working procedures and high cost, according to the outline of the part, the drawing process has been finished by one process instead of two, which is on the basic of the fnite element numerical simulation and the experiment on simple dies. the faults, such as incorrectness in the direct cliff, wrinkling in the gap, and the arc impress maintained after the first stretch on the part,are resolved effectively, and the quality and the efficiency are improved greatly.
this talks about the various ways that augmented reality (AR) affects environmental sustainability in the restaurant business. When combined with artificial intelligence (AI), augmented reality has the power to comple...
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Utilizing the sleep switch transistor technique and dual threshold voltage technique, a source following evaluation gate (SEFG) based domino circuit is presented in this paper for simultaneously suppressing the leakag...
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Aiming at the performance degradation of existing federated learning algorithms in non-IID image classification tasks, a method of improving SRGAN and dynamically balancing the distribution of client data sets is prop...
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Conventional H-plane waveguide filters are supplemented with E-plane stubs which simultaneously act as impedance inverters and create transmission zeros (attenuation poles) at prescribed frequencies. Due to the utiliz...
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Although research on non-visual access to visually represented information is steadily growing, very little work has investigated how such forms of representation could be constructed through non-visual means. We disc...
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ISBN:
(纸本)9781595939760
Although research on non-visual access to visually represented information is steadily growing, very little work has investigated how such forms of representation could be constructed through non-visual means. We discuss in this paper our approach for providing audio access to relational diagrams using multiple perspective hierarchies, and describe the design of two interaction strategies for constructing and manipulating such diagrams through this approach. A comparative study that we conducted with sighted users showed that a non-guided strategy allowed for significantly faster interaction times, and that both strategies supported similar levels of diagram comprehension. Overall, the reported study revealed that using multiple perspective hierarchies to structure the information encoded in a relational diagram enabled users construct and manipulate such information through an audio-only interface, and that combining aspects from the guided and the non-guided strategies could support greater usability. Copyright 2008 ACM.
the concept of communication-closed layers (CCL) of distributed programs that was introduced by the author (1989) is adapted for scheduling real-time tasks in a tightly-bound environment. A simple scheduling mechanism...
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ISBN:
(纸本)0818621338
the concept of communication-closed layers (CCL) of distributed programs that was introduced by the author (1989) is adapted for scheduling real-time tasks in a tightly-bound environment. A simple scheduling mechanism for tightly-bound concurrent programs based on CCL is proposed. this scheduling strategy supports an imprecise computation approach and hence it can be used for real-time systems where deadlines are met with acceptable precision. It is flexible because the priorities given to the tasks within a layer can be controlled by different factors and they are user defined. Logical units for scheduling are decided at the design phase using layering and hence the programmer has more control over scheduling of the program rather than writing programs that suit a particular scheduler. this scheduling mechanism is general and can be utilized for single or multi-processor systems in a centralized or distributed environment.
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