To reuse components in component-based real-time software development, especially the ones acquired from external sources, a component must satisfy its real-time constraints, such as thread priority and thread synchro...
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ISBN:
(纸本)0769515584
To reuse components in component-based real-time software development, especially the ones acquired from external sources, a component must satisfy its real-time constraints, such as thread priority and thread synchronization, to satisfy system real-time requirements. Since real-time applications have various real-time requirements, the ability to customize components for various real-time constraints is needed. Hence, the components to be used in real-time software development must have a set of well-defined features to facilitate component customization. Furthermore, since there are many techniques available for addressing real-time requirements, the features themselves must also be customizable to support these technique(s) used in a particular type of real-time applications. In this paper, an object-oriented component customization approach, including component customization and framework extension, for real-time applications software development is presented.
The novel fabrication of multiple components and unique heterostructure can inject infinite vitality into the electromagnetic wave (EMW) attenuation field. Herein, through the self-assembly of polyimide complexes and ...
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The novel fabrication of multiple components and unique heterostructure can inject infinite vitality into the electromagnetic wave (EMW) attenuation field. Herein, through the self-assembly of polyimide complexes and catalytic chemical vapor deposition, porous carbon microflowers were synthesized accompanied by carbon nanotubes (CNTs). By regulating the metal ions, the composition and structure of the as-obtained hybrids are modified correspondingly, and thus the adjustable thermal management and EMW absorption capabilities are obtained. In detail, the rich pores and huge specific surface area endow the hierarchical structures with distinguished thermal insulation ability (lambda<0.07). The carbon framework and CNTs are beneficial for consuming EMWs via conductive loss and defect polarization loss while reducing the filling ratio and thickness. The doped heteroatoms and abundant heterointerfaces generate ample dipole polarization and interface polarization losses (supported by DFT calculation). The metal nanoparticles uniformly embedded in the carbon framework offer optimized impedance matching, proper defect polarization, and suitable magnetic loss. Accordingly, the synergy of magnetic-dielectric balance and flower-like superstructure enables FNCFN2 and NNCFN2 to accomplish remarkable microwave absorbing capacity with thin thickness (14 wt.%). Therefore, respectable specific reflection loss and specific effective absorption bandwidth are acquired (215.39 dB mm(-1) and 22.10 GHz mm(-1), 257.23 dB mm(-1) and 22.12 GHz mm(-1) respectively), superior to those of certain renowned carbon-based absorbers. The simulation results of electric field intensity distributions, power loss density, and radar cross section reduction (maximum value of 36.02 dBm(2)) also verify the prominent radar stealth capability. Moreover, the customizable approach can be applied to other metals to obtain fulfilling behaviors. Henceforth, this work provides profound insights into the relationship
The new trend is to move from the traditional software development approach, which focuses on building software systems from scratch, to component-based software development approach, which revolutionizes how software...
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ISBN:
(纸本)0818690968
The new trend is to move from the traditional software development approach, which focuses on building software systems from scratch, to component-based software development approach, which revolutionizes how software systems are built. The focus of this new approach is on development of new systems by selecting and assembling a set of off-the-shelf components within an appropriate software architecture. On one hand the use of off-the-shelf components has led to a great potential for: (I) significantly reducing cost and rime to marker of large-scale and complex software systems, (2) improving system maintainability and flexibility by allowing new components to replace old ones, and (3) enhancing system quality by allowing components to be developed by those who are specialized in the application area, and systems to be built by software Engineers who are specialized in component-based software development On the other hand the use of commercial off-the-shelf software-delivered as black box components-has raised a few major technical and non-technical issues. This paper explores those issues, and discusses several directions for future research that would help to expand the use of component-based software development approach.
The goal of this paper is to present how techniques of the Agent Technology have been exploited to enhance software reusability and maintainability. The principal contributions are the definition of the concept of Age...
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