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Wireless Multimedia Sensor Networks (WMSN) has been one challenge category of special wireless sensor networks. Different-view videos captured by cameras in various different locations are typical multi-view videos. In order to reduce transmission quantity and conserve nodes' energy, traditional multi-view video coding approaches are long suitable for WMSN. In this paper, we propose a multi-view video...
This paper proposes an image transmission method based on the compression cost estimation for solving the problems of communication overloading in the wireless multimedia sensor networks. Firstly, according to the relative information entropy among the multimedia sensors, correlation comprehensive degrees of the nodes have been obtained. Then, before the image data are transmitted, energy consumption...
In this paper, we propose a re-ranking method which employs semantic similarity to improve the quality of search results. We fetch the top N results returned by search engine, and use semantic similarities between the candidate and the query to re-rank the results. We first convert the ranking position to an importance score for each candidate. Then we combine the semantic similarity score with this...
Orientation of chemical engineering principles (CEP) in Applied Chemistry Specialty and teaching reform were research in detail. From two aspects of sustainable development and social needs, CEP accounted for the important position. Under the engineering education idea of CDIO, the training plan was formulated. The teaching reform of CEP was explored in teaching practice from teaching content, teaching...
CALL is one important method in education. Educators nee d to think what the mediation may give, and try to make full use of the technology-enhanced education process. CALL is very useful, ye t it is only one channel which supplements the traditional lecture. Blended learning is the trend of language learning and teaching. To make CALL facilitate learners more, we need to strengthen the construction...
It is envisioned that home networks will shift from the current machine-to-human communications to the machine-to-machine (M2M) paradigm with the rapid penetration of embedded devices in home surroundings. In this paper, we first proposed an architecture of home M2M networks that is decomposed into three sub-areas depending on the radio service ranges and potential applications. We then concentrate...
This paper focuses on studying the impacts of a duty-cycle based CKN sleep scheduling algorithm for our previous designed TPGF geographical multipath routing algorithm in wireless sensor networks (WSNs). It reveals the fact that waking up more sensor nodes cannot always help to improve the exploration results of TPGF in a duty-cycle based WSN. Furthermore, this study provides the meaningful direction...
Using multimedia sensor nodes can enhance the capability of wireless sensor networks (WSNs) for event description. In some scenarios, e.g., an erupting volcano, the WSNs are not deployed to work for long time. Instead, the WSNs aim to deliver continuous and reliable multimedia data as much as possible within an expected lifetime. In this paper, we focus on the efficient multimedia data gathering in...
As broadband network services are becoming more and more abounding, the QoS(quality of service) of broadband networks has caught the attention of many professional people. Sometimes, the resource-constrain of embedded systems affects the quality of the multimedia services seriously. To solve this problem, this paper proposes an effective scheme for buffer management, which is named QoSBuf.. This scheme...
This paper proposes a QoS mechanism for cable modem in HFC access network after discussing the different network QoS mechanisms and studying the DOCSIS1.1 QoS standards in-depth. This mechanism ensures bandwidth, delay and delay jitter of multi-services for different kinds of IP data by classifier, traffic shaping, transmission ordering and scheduling. This article introduces services guarantee and...
In this paper, a two-phase geographic greedy forwarding (TPGF) routing algorithm is proposed in wireless multimedia sensor networks (WMSNs). TPGF is a pure geographic greedy forwarding routing algorithm, which does not include the face routing and does not use planarization algorithms. Simulation comparison in this paper indicates that TPGF is highly suitable for multimedia transmission in WMSNs.
As video summarization techniques have attracted more and more attention for efficient multimedia data management, objective quality assessment of video summary is desired. To address the lack of automatic evaluation techniques, this paper proposes a 3C-diagnosis algorithm to diagnose the video summary from the perspective of coverage, conciseness, and coherence. The candidate summary is first aligned...
Call admission control is an effective mechanism to guarantee robust services in wireless networks. In this paper, we present several call admission control algorithms and queueing models for the subcarrier allocation in the OFDM-based wireless multimedia networks. Call connection requests are differentiated into narrow-band call and wide-band call. For either class of calls, the traffic process is...
There are two major contributions in this paper in the context of Orthogonal Frequency Division Multiplexing (OFDM) subcarrier allocation. The first is to perform a tele- traffic queueing analysis for OFDM subcarrier allocation in wireless multimedia networks. In the literature, a variety of issues related to OFDM have been studied. However, the OFDM system performance is rarely investigated. Call...
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