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This paper proposes a novel context-aware cloud service selection model based on the comparison and aggregation of subjective assessment extracted from cloud user feedback and objective assessment from quantitative performance testing. In this model, objective assessment provided by some professional testing parties is used as a benchmark to filter out potentially biased subjective assessment from...
In recent years several research groups, including ours, have demonstrated participatory systems that use wearable or vehicle-mounted portable units coupled with smartphones to crowdsource urban air pollution data from lay users. These systems have shown remarkable improvement in spatial granularity over government-operated monitoring systems, leading to better mapping and understanding of urban air...
A new approach exploits existing Wi-Fi infrastructure to extract unique Wi-Fi signal patterns from the smartphones of people in lines to estimate wait times. The approach can work under real-world queue scenarios in various environments without requiring a specialized infrastructure or incurring manpower overhead. Furthermore, it only requires that a small fraction of people waiting in line use Wi-Fi...
One of the obvious challenges in cloud environments is trust crisis and its influence on the development of cloud computing. This paper analyzes the similarities and differences between cloud computing and other distributed environments, proposes the concept of trust and three different directions of trust-oriented research in cloud environments. According to three directions of trust-oriented research,...
The most important limiting factor of conventional D-InSAR method is strongly atmospheric wet delay during monitoring small landslides located at rainy and mountainous area. The wet delay phase could even cover deformation field of test site sometimes. In this paper, we found the wet delay phase over Shuping landslide was not only closely related with elevation, but also was a function of distance...
This paper presents the design and fabrication of a highly-miniaturized system for continuous glucose monitoring which holds great promise for patients inflicted with diabetes mellitus. To achieve the realization of a truly implantable system, a variety of issues such as robust electrochemical sensor design, miniaturization of the electronic components and counteracting biofouling and negative tissue...
Which diachronic phonetic changes happened in Mandarin Chinese by the past 100 years? This paper intends to analyze and compare the pitch and duration of read speech in broadcast news from a diachronic perspective. The research results show that the peaks of pitch are the highest, the pitch range is the widest in the 1970s, especially the upraising of the valleys of pitch are so frequent; and the...
With the development of the society, distance education and training gradually shows some characteristics similar to the service industry, such as invisible, cannot be stored, heterogeneous, serving and consuming in the same time and so on. To gain a bigger market share in competition and more reputation and brand value in development, distance education and training institutions must pay great attention...
Smart Grid is an important application in Internet Of Things (IOT). Monitoring data in large-scale smart grid are massive, real-time and dynamic which collected by a lot of sensors, Intelligent Electronic Devices (IED) and etc.. All on account of that, traditional centralized storage proposals aren't applicable to data storage in large-scale smart grid. Therefore, we propose a data-centric storage...
Operating data in smart grid are usually collected by a lot of sensors in Cyber-Physical systems. Monitoring data in large-scale smart grid are massive, real-time and dynamic. All on account of that, traditional centralized storage proposals isn't applicable to data storage in large-scale smart grid. Therefore, we propose a data-centric storage approach in support of monitoring system in large-scale...
Proliferation of low-cost nonintrusive wearable sensors enables researchers to explore capabilities in monitoring physiological parameters remotely expanding healthcare delivery and reducing costs. One of the parameters that is known to be important in rehabilitation and exercise physiology is human motion monitoring, such as analysis of the walking gait and corresponding characteristics. This paper...
Engineering education is the main channels that cultivate and also supply a great number of talents of engineering technology and engineering management for national construction and steady development. Engineering quality guarantee system is the key to improving the tendency of more emphasis on teaching knowledge and less emphasis on cultivating capability. Engineering quality guarantee system can...
PSInSAR has been proved an operational tool for surfaces deformation monitoring due to its millimeters precision and dense spatial samplings. However, PSInAR derived deformation parameters including the average displacement velocity and displacement history can't be compared directly with these measured by the conventional technique such as leveling and GPS since the different reference datum between...
Spaceborne Radar Interferometry (InSAR) is well known as an accurate, time saving and low cost technique for monitoring of surface deformation phenomena ranging from land subsidence, volcano displacement, tectonic motion and even slow landslides. The Coherent Point Target SAR Interferometry (CPT-InSAR) overcomes atmospheric delay anomalies and the temporal and geometric decorrelation by the interferometric...
Aims: the purpose of this study was to develop a new left ventricular assist device which causes less blood damage. Methods: During design of the device, the method of Computational Fluid Dynamics (CFD) was used to optimize the device shape, number of impeller vanes, the structure and position of the guide vanes, and the size of the impeller screw-pitch. After that the device, that was an axial flow...
Wireless Sensor Network (WSN) technology is employed in monitoring system to prevent the spontaneous combustion of coal gangue. A temperature monitoring system was designed, which monitor environment of gangue and prevent the occurrence of spontaneous combustion networking strategy through the collection of temperature in real-time or fix time. According to the energy-constrained problem of WSN, pseudo-parallel...
Fault localization is an important issue in all-optical networks. Considered with the accurate and fast multi-link failures localization for multi-domain all-optical networks, we propose an effective localization mechanism based on the limited perimeter vector match (LVM) protocol. The inter-domain multi-link failures are located according to the alarm and monitoring information. And the disrupted...
Since Representational State Transfer (REST) architecture was proposed by Fielding in early 1990s for distributed hypermedia systems, it has become a popular architectural style of choice in various computing environments. However, REST was not originally designed to support enterprise requirements, in particular the accountability requirements that are crucial for the business services offered through...
The Permanent Scatterer Interferometry (PSI) technique is usually applied for surface deformation mapping at local area from 1 up to a maximum of 100 km2. Although the ability to provide deformation map of regional area exceeding 10,000 km2, the processed area of interest is mostly limited to SAR acquisitions in a single satellite track and frame. In this work we present the study of merging multi-track...
With a spatial resolution of up to 1 m, the German radar satellite TerraSAR-X has significantly improved the applicability of spaceborne SAR interferometry (InSAR) technique for fast ground motion monitoring due to its high spatial resolution and short time interval. In this work we present the first Permanent Scatterer Interferometry analysis with TerraSAR-X data for urban subsidence mapping in Tianjin...
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