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Photos crowdsourced from mobile devices can be used in many applications such as disaster recovery to obtain information about a target area. However, such applications often have resource constraints in terms of bandwidth, storage, and processing capability, which limit the number of photos that can be crowdsourced. Thus, it is a challenge to use the limited resources to crowdsource photos that best...
The quadcopter technology has been developed for many years. It has the advantages of light weight, small size, high mobility and autonomy. At present, it is already a proven technology, especially in outdoor environments. As the Global Positioning System (GPS) can provide accurate geographic coordinates for quadcopters, this endows the drones with certain abilities, such as loiter and waypoint navigation...
In conventional power systems, client-server architecture and centralized control are adopted for data acquisition and supervisory control, and the speed of message transmission and the fault responses is slow. In contrast, various types of distributed energy resources (DERs) with different characteristics and of different capacities exist in a microgrid system, and client-server architecture and...
NAND flash memory has become the mainstream storage medium for both enterprise high performance computersand embedded systems. However, over the past several decades, the storage primitives that access secondary storage have remained unchanged, forcing NAND flash memory to serve merely as a block device like hard disk drive. Recently, several emerging storage primitives have been presented to explore...
Distributed detection with dependent observations is always a challenging problem. The problemof detectionwith shared information has many applications when sensors have overlapped measurements, e.g., when distributed detection is performed in a security system where sensors have overlapped coverages. For this shared information scenario, we investigate the distributed detection problem in parallel...
In cognitive radio networks, unlicensed users can use under-utilized licensed spectrum to achieve substantial performance improvement. To avoid interference with licensed users, unlicensed users must vacate the spectrum when it is accessed by licensed (primary) users. Since it takes some time for unlicensed users to switch to other available channels, the ongoing data transmissions may have to be...
Energy detection (ED) is a popular spectrum sensing technique for cognitive radios. The study of ED which takes into account the dynamic of traffic patterns of primary users, in the form of random signal arrival and departure, is of both theoretical and practical importance. Some of the existing works, however, resort to certain approximation techniques to characterize the detection performance. In...
Homophily refers to the phenomenon where people who are socially-connected share many characteristics including demographic and behavioral properties. The goal of this paper is to see whether homophily exists in call networks and if so, to what degree we can infer a cellphone user's demographic properties by knowing the demographic information of the people that s/he talks to. We focus on three types...
This paper proposes a new flux-weakening control strategy for Interior Permanent Magnet Synchronous Motor (IPMSM) drives. The difference of reference voltage vector action time using over-modulation technique in SVPWM is used to modify d-axis current to realize the flux-weakening control strategy. Automatic transition between the constant torque region and the constant power region can be achieved...
an improved visual attention method based on human vision attention model Itti has been proposed. Firstly, the contour information is added to the Itti model to improve the recognition ability. Then an adaptive hybrid strategy for color and brightness feature maps is proposed, according to human retina's physiological characteristics under different environments. Besides, by adding motion feature...
A large number of experiments show many software systems have the statistical characteristics of complex networks. Complex networks theory provides a global view of observation and analysis of software systems. The basic concepts of complex networks were introduced briefly. The current research results on the combination of complex networks theory and software engineering were summed. And nine future...
The research on how to make a photo-based personalized facial sketch has important scientific significance and practical values. This paper proposes a method on how to generate a personalized sketch from digital color photo. First, the feature points are automatically extracted through Active Shape Model and the positions of these points are recorded; then, the style factor can be got from stylized...
Reclaim of electricity fee, which is ordinarily called as receivables in distribution management system, is very important for public utility, especially in the circumstance of electricity market, and to predict which credit types the clients would be is one of the most important work. Based on the data of MIS and objection of credit management, a practical credit index is designed. With the ANFIS...
Service process usually needs to be changed during reuse because of the change of context. These change mapping relations provide additional information to help users customize service processes. In this paper, we present a mining approach to mining process change sequences based on different context and finding the best sequence to tailor the base process.
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