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We propose a new real-time framework which efficiently reconstructs large-scale scenery by accumulating anisotropic point representations in combination with memory efficient representation of point attributes. The reduced memory footprint allows to store additional point properties that represent the accumulated anisotropic noise of the input range data in the reconstructed scene. We propose an efficient...
Automatic causal discovery is a challenge research with extraordinary significance in sceintific research and in many real world problems where recovery of causes and effects and their causality relationship is an essential task. This paper firstly introduces the causality and perspectives of causal discovery. Then it provides an anlaysis on the three major approaches that are proposed in the last...
Distributed storage systems comprise a large number of commodity hardware distributed across several data centers. Even in the presence of failures (permanent failures) the system should provide reliable storage. While replication has advantages because of its simplicity there exist coding techniques that provide adaptable reliability properties with an optimal redundancy ratio at the same time e...
Distribution of electronic media to cars plays a key role when it comes to the deployment of car-to-infrastructure communications. Like in other point-to-multipoint systems, the application of fountain codes is highly promising. In this paper, we investigate the applicability of fountain codes in an infrastructure-based automotive communication system and introduce an expedient method to design such...
We all have a large amount of data stored in Gmail, Facebook, Twitter, Google Docs and many other online services. With the increasingly importance of these online data, we need an effective way to protect it. This paper proposes a personal data storage system, UPDS, to improve personal data's availability and durability. Two common approaches to improve availability and durability are complete replication...
New applications for wireless sensor networks (WSNs) that demand stricter quality of service guarantees may require high levels of scalability, robustness, life expectancy and response time. Unfortunately, most sensor network communication protocols often guarantee several of these requirements at the risk of others. Caching provides a doorway to a solution, however works reviewed thus far in WSN...
A novel IP quality evaluation method is proposed in this paper. Based on the analysis of the characteristics of several current mainstream IP quality evaluation metrics, advantages and deficiencies of them are summarized. The comparison indicates that due to coarse grain of classification and focusing more on common features, the definition methods of these metrics are lack of individual characteristics...
The soft-error vulnerability of flip-flops has become an important factor in IC reliability in sub-100-nm CMOS technologies. In the present work the soft-error rate (SER) of a 65-nm flip-flop has been investigated with the use of alpha-accelerated testing. Simulations have been applied to study the flip-flop SER sensitivity in detail. Furthermore, an easy-to-use approach is presented to make an accurate...
We consider data-streaming from an access point to multiple receivers, which is modeled as packet erasure channel. A simple network coding is shown to achieve larger rate region than without network coding, using minimal control information. The performance is characterized exactly using state transition graph. The scheme is then mapped to an information theoretic formulation for broadcast channel...
This paper establishes a speaker-independent pronunciation recognition and assessment system with 673 words for mandarin Chinese under the background of a Chinese learning system framework. The recognition part is based on HTK using HMM (Hidden Markov Models) and improved in the aspect of acoustic model. Making use of the recognition results and the log-likelihood obtained from the Viterbi coding,...
Expected growth in use and implementation of wireless sensor networks (WSNs) in different environments and for different applications creates new security challenges. In WSNs, a malicious node may initiate incorrect path information, change the contents of data packets, and even hijack one or more genuine network nodes. As the network reliability completely depends on individual nodespsila presence...
This paper studies efficient complex valued matrix manipulations for multi-user STBC-MIMO decoding. A novel method called Alamouti blockwise analytical matrix inversion (ABAMI) is proposed for the inversion of large complex matrices that are based on Alamouti sub-blocks. Another method using a variant of Givens rotation is proposed for fast QR decomposition of this kind of matrices. Our solutions...
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