The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Very few ecommerce participants are observed to be satisfied with ecommerce-raised business expenses, profit sharing, fake products, or user privacy. In this article, a new ecommerce concept, i.e., Balanced Commerce, is proposed to address the concerns through innovative trading paradigms and principles. The balanced ecommerce promotes direct trades with no intermediary merchants, public and sharing...
A variety of applications (App) installed on mobile systems such as smartphones enrich our lives, but make it more difficult to the system management. For example, finding the specific Apps becomes more inconvenient due to more Apps installed on smartphones, and App response time could become longer because of the gap between more, larger Apps and limited memory capacity. Recent work has proposed...
The thin disk-shaped active medium is a very thin laser crystal with one face mounted on a heat sink. The large cooled-surface-to-active-volume ratio avoids thermal problems occurring in conventional high power rod or slab lasers and enables high power TEM00 operation. However, the absorption of pump light in the thin disk crystal for single pass is very small in the end-pumped configuration. A classical...
Flooding broadcast is the main way of vehicular node forwarding packets in Vehicular ad-hoc network (VANET). However this way may cause network congestion especially when multiple broadcast nodes send packets to the same receiving node at the same time. In this paper, a Congestion-Aware GPCR Routing Protocol (CA-GPCR) has been proposed to improve the performance of GPCR routing protocol in urban scenarios...
This paper presents a two die assembly of inertial sensors consisting of three (3) orthogonal gyroscopes and three (3) orthogonal accelerometers which demonstrates tactical-grade performance and occupies a total volume of 112 mm3. The sensor mechanisms are identical to existing tactical-grade products while the volume reductions are achieved by combining the sensors into a two-die stack that is wafer-level...
With high-performance mobile processors and large main memory, smartphones are now integrated with more applications and richer functionality than ever. This poses larger memory and storage space demands, however, most mobile systems have limited memory space, which in turn affects user satisfaction. For example, application response time could become longer due to limited memory capacity. Swapping...
Due to a lack of experience, business might not be confident about the completeness of their proposed data mining (DM) project objectives at early stage. Besides, business domain expertise usually shrinks when delivered to data analysts. This expertise ought to contribute more throughout whole project. In addition, the outcome from DM project might fail to transform into actionable advice as the interpretation...
To teach the computational science necessary to prepare STEM students for positions in both research and industry, faculty need HPC resources specifically tailored for their classrooms. Scholar was developed as a large-scale computing tool that faculty can use in their classrooms to teach HPC as well as scientific principles and experimentation. In this paper, we discuss the pedagogical need for a...
Partial discharge (PD) ultra-high frequency (UHF) sensors are widely used for condition monitoring and defect location in gas insulated substation (GIS). There are many designs of UHF sensors which can detect electromagnetic waves that radiate from PD sources. The general types of UHF sensors are disc, monopole, probe, spiral, and conical types with each type of sensor having different characteristics...
Hundreds of features have been extracted from phase resolved partial discharge (PRPD) pattern and PD waveforms to represent and recognize typical defects. Several feature selection and dimension reduction methods for pattern recognition are presented in this paper. Feature selection algorithms including forward feature selection, backward feature selection and floating forward feature selection (FFFS)...
Ultra-high-frequency (UHF) method has been applied to detect and localize partial discharge (PD) in air-insulated substation (AIS). The localization accuracy is closely dependent on the configuration of antenna array. This paper presents a PD localization error simulation method. Assuming that the estimated time difference of arrival (TDOA) error is normally distributed, the mean value and standard...
It is a significant problem to efficiently identifythe frequently-occurring patterns in a given dataset, so as tounveil the trends hidden behind the dataset. This work ismotivated by the serious demands of a high-performance inmemoryfrequent-pattern mining strategy, with joint optimizationover the mining performance and system durability. While thewidely-used frequent-pattern tree (FP-tree) serves...
Individuals can get the behavioral information from mass medias, as they always face various kinds of mass medias. Unfortunately, a systematical study about the effects of mass medias on social contagions is still lacking. To this end, we propose a novel non-Markovian social contagion model, in which individuals obtain the behavioral information not only from their neighbors but also from the mass...
UHF-based partial discharge (PD) early warning technique has been tried to monitor and localize PD activities in the whole Air-Insulated Substation (AIS). This paper presents a PD detection and localization system based on this method. This system is composed of four-antenna array (double-cone structure), signal conditioning unit (wide band filter, low-noise amplifier and band-stop filter) and high-speed...
Recommendation is an important problem in the traditional field of data mining. As a consequence, various kinds of algorithms have been proposed in the last few years to improve the recommendation performance. However, many of them overlook users' rating behaviors. In this paper, an improved recommendation algorithm with considering users' habits and rating behaviors will be proposed. Firstly, calculate...
The oil-paper insulation has been widely used in large power equipment, and thermal and electrical stresses are the two main origins causing the deterioration and failure of oilpaper insulation system. In this paper, accelerated aging experiments of oil impregnated paper are conducted and partial discharge (PD) measurement are performed under typical defect models, i.e. protrusion, surface discharge...
Partial discharge (PD) site in high voltage power equipment can be located by solving the time difference equations. Estimating the time difference between PD signals with high accuracy is of great importance for accurate locating. This paper presents a time difference determining algorithm using cumulative energy function and differential energy method. The differential energy characterize the increase...
In this paper, the influence of metal particle position at insulating spacer on partial discharge (PD) characteristics is studied by using the ultra high frequency (UHF) detection method in a 252kV GIS PD experimental platform. The PD inception voltage (PDIV), phase resolved partial discharge (PRPD), phase resolved pulse sequence (PRPS) and UHF signal waveform and its frequency spectrum are investigated...
Phase change memory (PCM) is considered as a promising alternative of DRAM-based main memory in embedded systems. A PCM cell can be dynamically programmed to be in either multiple-level cell (MLC) mode or single-level cell (SLC) mode. With this morphable feature, we can utilize the high-density of MLC and low-latency of SLC, to satisfy various memory requirements of specific applications in embedded...
Mobile systems such as smartphones and tablets are re-adopting swapping -- a mature but by rarely used OS feature -- to extend memory capacity without adding more DRAM, especially low-end devices. This resurgence of swapping in mobile systems has inspired both traditional "off-the-rack" schemes and new approaches based on compression and new hardware. Their vastly different designs, however,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.