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For a consumer brand, the most valuable customers are those who return after this purchase. Therefore, we want to know if it is possible to predict which shoppers will buy a new item with enough purchase history. Fortunately, while dealing with Big Data and with data streams in particular, it is a common practice to summarize or aggregate customers' transaction history to the periods of few months...
The popular LDPC decoding algorithms based on the message passing (MP) algorithm have high decoding performances. However, they are noticeably inferior to the maximum likelihood (ML) decoding algorithm. This work proposes a genetics-aided message passing (GA-MP) algorithm by applying a new genetic algorithm to MP algorithm. As a result, significantly performance improvement over MP algorithm can be...
Due to the large amount of users of the next generation IPTV system and the limitation for RTCP control messages below 5% of the total allowed bandwidth, the traditional RTCP feedback framework caused large intervals when sending feedback messages from each receiver. To solve these problems, the hierarchical feedback model is proposed in this paper and combined to the design of video quality monitoring...
The problems of pinball route and multi-layer packet encapsulations exist in nested NEMO (network mobility) specification. To solve this problem, a routing optimization scheme is proposed in this paper based on hierarchical MIPv6. In this solution the MAP with location handover management is introduced, and the most registration messages are kept in MAP domain, and the packets in MAP domain are forwarded...
TCP Vegas congestion algorithm was designed for wired networks, but has poor performance when used in mobile ad hoc network. This paper analyses the impact of hops changing in mobile ad hoc network on the performance of TCP Vegas, and presents a new algorithm named TCP Vegas-HA (TCP Vegas — Hops Adaptive) to improve the performance of TCP Vegas in mobile ad hoc network. As the minimum round-trip time...
Traditional single-CPU based NIDS/NIPS are more and more difficult to deploy in the new generation network because of their less processing power. To meet the requirements of high-speed, high performance and high efficiency for NIDS/NIPS in the new generation network, the scheme of linked IPS based on Octeon multi-core processor is proposed, furthermore, the new intrusion characteristics occurring...
According to recent literatures about competitive models of enterprises based on ecological theory, an interactive competition difference system model of enterprises is put forward based the modeling thought that environment change and delay may affect the output level. And then using the properties of Logistic differential systems Mawhin continuity theorem, a sufficient condition of enterprise co-existence...
The nonreversibility of strategic investment and nondeterminacy of information acquired from inner and outer environment put importance on the strategic choice timing. Whether the conversion timing is chosen correctly or not has become one of the key factors influencing the conversion performance. At first, this paper analyzes the influencing factors and random characters of strategic choice timing,...
Web GIS is one of the hot topics today. Because of its professional characteristic, a Web GIS application often requires complicated configuration before it can be used. In this paper, a method to develop pre-configured plug-and-play Web GIS is presented for saving the energy and time needed by the installation, configuration, and maintenance of Web GIS. According to the method, two systems, original...
First, this paper discusses the definition of strategic flexibility of corporation (SFC), analyzes its intrinsic structure, and uses fitness landscape to analyze interactions of SFC and relationships between elements and whole of SFC in detail. Then, according to the theory of complex adaptive system, this paper analyzes the evolution mechanism of SFC. And it indicates that the evolution dynamic of...
This paper presents a novel algorithm-kernel based 2D symmetrical principal component analysis (K2DSPCA), which takes full advantage of kernel method, the symmetrical property of facial image and the structural information of image (i.e., the advantage of two-dimensional PCA). Firstly, a facial image is decomposed into an even image and an odd image; Secondly, both the even image and the odd image...
In this paper, the humidity interference on the ammonia sensors was studied and proposed. The shear horizontal surface acoustic wave (SH-SAW) devices coated with L-glutamic acid hydrochloride were applied as ammonia sensors. The responses to ammonia in the humid environment were positive frequency shifts and the perturbation was primarily from the elastic effect. In order to precisely estimate the...
A shear horizontal surface acoustic wave (SH-SAW) sensor coated with the polyaniline (PANI) film was investigated in this study. The frequency shift of the SH-SAW was measured for detecting ammonia. In addition, the temperature effect was discussed in order to find a suitable temperature of operation. The SH-SAW sensor in this study could immediately respond the concentration of ammonia gas and showed...
Mobile ad hoc network (MANET) is a multihop wireless network formed by a collection of mobile nodes communicating through radio links characterized by the absence of any preexisting infrastructure. Many of the proposed on-demand routing algorithms for MANET assume that the given network is an undirected graph. Some modifications or new algorithms have been proposed to solve the unidirectional link...
As security is becoming a significant obstacle to wider deployment of wireless LANs, IEEE 802.1x and EAPoW has been put forward to enhance authentication in WLAN. At present, some existing client solution such as Xsupplicant or WIRE1x has only applies to one platform, Linux or Windows, and is ill-considered of EAPoW. This paper discusses an integrated multi- platform EAPOW-based WLAN AAA Solution...
A shear horizontal surface acoustic wave (SH-SAW) sensor coated with polyaniline (PANI) was investigated in this study. The frequency shift of SH-SAW was measured for the response to ammonia in this study. The temperature effect was also discussed in order to find the suitable temperature of operation. The response of the SH-SAW sensor immediately responded the concentration of ammonia gas. Moreover,...
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