摘要 :
The quality of software design always has a significant impact on the extendibility and maintainability of the final product. Automatic techniques may help designers to achieve better design. There are several ways for software de...
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The quality of software design always has a significant impact on the extendibility and maintainability of the final product. Automatic techniques may help designers to achieve better design. There are several ways for software design automation. Generally Search-based methods such as GA, ant colony, and ICA are used for problems with large search space in which finding the optimal solution is hard. In this paper a hybrid algorithm called ICA-TS (Imperialist Competitive Algorithm-Tabu Search) is presented to generate class diagram of the under design system automatically. The method has three phases: First, formal concept analysis (FCA) for preprocessing phase of the method is used as a mean to generate initial solution. Next a hybrid of ICA and TS is used to update solutions. The relationships between classes are determined in third phase. Three standard case studies are used for performance evaluation and the results are compared with results of genetic and simple ICA. The results show that the presented method has competitive results and it can generate more efficient class diagram in terms of cohesion, coupling and complexity of system.
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摘要 :
The quality of software design always has a significant impact on the extendibility and maintainability of the final product. Automatic techniques may help designers to achieve better design. There are several ways for software de...
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The quality of software design always has a significant impact on the extendibility and maintainability of the final product. Automatic techniques may help designers to achieve better design. There are several ways for software design automation. Generally Search-based methods such as GA, ant colony, and ICA are used for problems with large search space in which finding the optimal solution is hard. In this paper a hybrid algorithm called ICA-TS (Imperialist Competitive Algorithm-Tabu Search) is presented to generate class diagram of the under design system automatically. The method has three phases: First, formal concept analysis (FCA) for preprocessing phase of the method is used as a mean to generate initial solution. Next a hybrid of ICA and TS is used to update solutions. The relationships between classes are determined in third phase. Three standard case studies are used for performance evaluation and the results are compared with results of genetic and simple ICA. The results show that the presented method has competitive results and it can generate more efficient class diagram in terms of cohesion, coupling and complexity of system.
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This paper proposes a combination of network frequencies as the supporting medium for communication within a small Search and Rescue (SAR) team to ensure stable communication, and thus command and control, in particular in a fores...
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This paper proposes a combination of network frequencies as the supporting medium for communication within a small Search and Rescue (SAR) team to ensure stable communication, and thus command and control, in particular in a forest environment. The proposal is to implement a combination of 869 MHz and 2.4 GHz, which will support the use of smart phones for the SAR team members for audio/oral, visual and data communication as well as other facilities, the most important being location monitoring. The proposal also includes the positioning of the (mobile) base station for uninterrupted coverage.
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摘要 :
This paper proposes a combination of network frequencies as the supporting medium for communication within a small Search and Rescue (SAR) team to ensure stable communication, and thus command and control, in particular in a fores...
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This paper proposes a combination of network frequencies as the supporting medium for communication within a small Search and Rescue (SAR) team to ensure stable communication, and thus command and control, in particular in a forest environment. The proposal is to implement a combination of 869 MHz and 2.4 GHz, which will support the use of smart phones for the SAR team members for audio/oral, visual and data communication as well as other facilities, the most important being location monitoring. The proposal also includes the positioning of the (mobile) base station for uninterrupted coverage.
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Wireless is among technology's biggest contributions to human beings. Wireless technology involves the delivering of data over a distance without aid of wires, cables or any other types of electrical conductors. The delivering dis...
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Wireless is among technology's biggest contributions to human beings. Wireless technology involves the delivering of data over a distance without aid of wires, cables or any other types of electrical conductors. The delivering distance could be anyplace among a few meters and thousands of kilometers. In this paper, we outline the future of wireless technology and discuss potential problems and solutions.
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Wireless is among technology's biggest contributions to human beings. Wireless technology involves the delivering of data over a distance without aid of wires, cables or any other types of electrical conductors. The delivering dis...
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Wireless is among technology's biggest contributions to human beings. Wireless technology involves the delivering of data over a distance without aid of wires, cables or any other types of electrical conductors. The delivering distance could be anyplace among a few meters and thousands of kilometers. In this paper, we outline the future of wireless technology and discuss potential problems and solutions.
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Diversity of radio access technologies, such as ZigBee, Bluetooth, LTE and Wi-Fi, together with growing requirements for their simultaneous use, significantly increase complexity of Internet of Things (IoT) wireless networks. A nu...
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Diversity of radio access technologies, such as ZigBee, Bluetooth, LTE and Wi-Fi, together with growing requirements for their simultaneous use, significantly increase complexity of Internet of Things (IoT) wireless networks. A number of open challenges affect practical deployments, such as simultaneous use of multiple technologies, intelligent coordination of a subset of nodes, coexistence of different technologies using the same spectrum, efficient management of (simultaneously used) heterogeneous radio links, etc. This paper will consider Semantic Technology (ST), as a promising approach to coordination in such complex wireless infrastructures, especially in cases where interference models are not well understood. A Neural Network (NN) will be used for the network state estimation and ST for reasoning about required actions. It is based on semantic data sets mining such that coordination decisions may be driven by predictions instead of using physical spectrum sensing devices. ST facilitates reasoning about coordination, application priority, frequency selection and dynamic spectrum access. Because of capability of the NN to solve regression and classification problems, potentially problematic network states could be proactively avoided instead of reactively corrected particularly in priority critical applications.
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The multi-AP coordination is a key feature of Wi-Fi 7 (EHT) and is a promising approach to improving the utilization of limited radio resources. However, the APs coordination requires the exchange of information among the APs in t...
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The multi-AP coordination is a key feature of Wi-Fi 7 (EHT) and is a promising approach to improving the utilization of limited radio resources. However, the APs coordination requires the exchange of information among the APs in the coordination set in order to make the optimal sharing decision with regard to specific performance parameters. In this work, we present the control frames defined for this purpose and the transmission procedures defined in EHT for the multi-AP coordination. We implemented the new frames and EHT procedures in ns-3. Furthermore, we designed and implemented a scheduler with the aim to improving the performance of EHT network in non-saturated conditions by sharing the time resources, i.e., C-TDMA. Then, we assessed the performance of the proposed scheduler in ns-3. Multi-AP coordination through C-TDMA allows for reduction of the network latency of one order of magnitude while keeping the network throughput stable.
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Monitoring the health of a sensor network is im-portant for maintaining the health and normal operation of the network. For large-scale cost-effective monitoring, using inexpensive motes as sniffers is an attractive choice. In thi...
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Monitoring the health of a sensor network is im-portant for maintaining the health and normal operation of the network. For large-scale cost-effective monitoring, using inexpensive motes as sniffers is an attractive choice. In this paper, we quantify the capability and fidelity of mote-class sniffers for sensor network monitoring. In particular, we experimentally quantify the sustainable workload and the accuracy of delay and loss measurements by these types of sniffers. We find that (1) a sniffer can monitor traffic at the rate of 60 packets per second with little buffer overflow, (2) per-hop loss measurements from sniffers exhibit variations but are comparable to those at the receiver and (3) per-hop delay measurements from a sniffer are accurate (the errors are up to 300 As). Our results indicate that measurement quality by mote-class sniffers is satisfactory for many monitoring purposes.
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Traffic offload improved method for 4G/5G mobile network was proposed. For this purpose was made sociological survey among users of mobile networks in Ukraine. In this work was shown multilink connectivity usage as possible soluti...
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Traffic offload improved method for 4G/5G mobile network was proposed. For this purpose was made sociological survey among users of mobile networks in Ukraine. In this work was shown multilink connectivity usage as possible solution for traffic offload. Three scenarios for traffic offload were proposed and then their modeling provided. The efficiency of network offload was up to 55\%.
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