In cloud computing, virtual machines (VMs) tend to be configured and reconfigured on the fly for the provisioning of an elastic computing environment. Their resident applications often have a number of performance-cri...
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ISBN:
(纸本)9781450300742
In cloud computing, virtual machines (VMs) tend to be configured and reconfigured on the fly for the provisioning of an elastic computing environment. Their resident applications often have a number of performance-critical parameters that need to be configured in response to the change of workload and VM resources. The interplay of these two levels of configuration requires autoconfiguration of the cloud systems in a coordinated manner. In this paper, we propose a framework, namely CoTuner, for this purpose. At the heart of the framework is a self-learning and automated control approach. The approach is a hybrid of reinforcement learning and the Nelder-Mead optimization techniques. It is further enhanced by the use of systems knowledge to accelerate the learning process. Experimental results demonstrate that the approach gains more than 15% performance improvement over independent tuning of VMs and application parameters. It can drive the cloud system into an optimal or near-optimal configuration in less than 50 trial-and-error iterations.
This paper describes the development of WaterWiSe@ SG, a wireless sensor network to enable real-time monitoring of a water distribution network in Singapore. The overall project is directed towards three main goals: 1...
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Advancements in Information Technology are frequently adapted in the field of health-care services for better performance. Rapid evolution in positioning technologies lead the growth of mobile services to value-added,...
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ISBN:
(纸本)9789048136575
Advancements in Information Technology are frequently adapted in the field of health-care services for better performance. Rapid evolution in positioning technologies lead the growth of mobile services to value-added, localized, personalized and time critical services offering connectivity at anytime, in anywhere. This paper proposes a Location Based Mobile Healthcare system Architecture and Mobile User application integrated with latest technology in wireless communication;Personalization and customization of such services based on the Location Based Services and the profiles of mobile users. The proposed architecture and application allow the health-care providers and patients to connect across the globe. The movement of services provided to the patient from desktop platform to mobile technology can bring significant impact on health care services.
Recently many educational researchers have proved that learning style is an important factor to impact on learning effect This paper did a deep analysis on the characteristic and application of learning style models c...
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ISBN:
(纸本)9783642145322
Recently many educational researchers have proved that learning style is an important factor to impact on learning effect This paper did a deep analysis on the characteristic and application of learning style models chose FSLSM as the learning style model in our system then drew up a plan to diagnose and revise the learning style Based on the differences of learners learning style we construct the adaptive pedagogical strategy model under the Semantic Web from sections such as the learning resources learning paths adaptive rules
This paper focuses on performance evaluation of serving nodes responsible for executing web applications requests. A scalability mechanism that will be discussed throughout this paper is;memcached, an object caching s...
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Through researching FlexRay high-speed bus technology, this paper auxiliary builds electric power system hardware interface standards and software application layer standards. Meanwhile, this paper also realizes low c...
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ISBN:
(纸本)9783642165146
Through researching FlexRay high-speed bus technology, this paper auxiliary builds electric power system hardware interface standards and software application layer standards. Meanwhile, this paper also realizes low cost and high speed communication network of digital transformer substation bottom layer, and cooperates with IEC61850 Standard to perform digital transformer substation network structure. The experiment result shows this paper's work has actual meaning to low end application such as intelligent building, family electric and industrial and mining enterprises.
Replication is a technique widely used in parallel and distributed systems to provide qualities such as performance, scalability, reliability and availability to their clients. These qualities comprise the non-functio...
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Since the emergence of WSNs (Wireless Sensor Networks), various middleware architectures have been proposed to achieve a suitable abstraction from the distribution and management tasks of sensor devices. This allows u...
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ISBN:
(数字)9783642176258
ISBN:
(纸本)9783642176241
Since the emergence of WSNs (Wireless Sensor Networks), various middleware architectures have been proposed to achieve a suitable abstraction from the distribution and management tasks of sensor devices. This allows users to focus on application development. In the near future, WSNs will be more pervasive, common, and distributed. Programming on WSNs requires a novel programming paradigm and middleware, especially in distributed and heterogeneous WSNs. We propose Virtual Sensor Agent-Oriented Middleware (VSAM), a middleware system for distributed and heterogeneous WSNs, which provides data dissemination protocol-independent application Programming Interface (API) and an integrated platform for sensor applications. VSAM makes it possible to integrate WSNs with traditional networks.
Unified Modelling Language (UML) is as a standard object-oriented modelling notation that is widely accepted and used in software development industry. In general, the UML notation is informally defined in term of nat...
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We present an end-to-end simulation framework that is capable of simulating High-Performance Computing (HPC) systems with hundreds of thousands of interconnected processors. The tool applies discrete event simulation ...
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