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Nowadays, microblogging is becoming a part of people living in network. Because of the importance of popular topic mining, microblogging popular topic mining technology receive widely attention. This paper introduces a popular topic mining method based on microblogging. First of all, we pretreat microblogging content, such as remove noise words and stop words for word analysis in next stage. Next,...
In data mining area, data stream classification, detecting concept drifts and updating temporary models are challenging tasks. To deal with this, big sample buffer and complex updating process are always needed for most of the current algorithms. In this article, a digital hormone based classification algorithm was presented. With the given way, we do not need a big sample-buffer in the classification...
Recently, product perfect codes (PPC) steganographic method was proposed by H. Rifa-Pous and J. Rifa, which can achieve large embedding efficiency with less distortion. They divided the cover image into disjoint matrix blocks and apply F5 algorithm in each row and some columns. The proposed method in this paper improves the PPC embedding method. F5 algorithm was also utilized in each row, but to the...
Under the research and analysis on different types of clustering algorithms, focus on the limitation of the Jarvis-Patrick algorithm and other clustering algorithm based on SNN density, a new clustering algorithm is proposed in this paper, that is, Improved Clustering algorithm based on Local Gathering Features. The paper gives the definition of the Gathering Features during the procedure of the clustering,...
Based on English phonetic spelling correction algorithm, this paper is to solve common spelling errors such as missing letters, extra letters, disordered letters, as well as phonetic spelling errors in the perspective of from the same pronunciation, similar pronunciation. Through the analysis of the causes of the spelling errors, an algorithm of combination of phonetic spelling correction, phonetic...
It is an important source for Commercial bank's reserve to deal with liquidity risk. In the modern society with highly increasing liquidity risk, the management to commercial bank's reserve is particularly important. Based on the analysis of Monti-Klein model, I take liquidity risk into account and draw some interesting conclusions: 1. In the management to Commercial bank's reserve, the increase to...
The transfer hub plays important role in urban public transit. The level of transfer capacity of transfer hub has great impact on the total operation state of urban transit system. Moreover, pedestrian facilities design principles and passenger management methods don't attach the widespread attentions comparing with other issue in many underground transfer hubs. At present, more pursuers have focused...
Recent studies have shown mining compressed frequent itemset patterns provides more benefits than mining the closed frequent patterns, since mining compressed frequent itemset patterns leads to more compact and representative result sets. Especially, it is quite meaningful in the environment of data stream where limited memory space and computation quality are major challenges. In this paper, the...
Functional magnetic resonance imaging (fMRI) methods measure neuronal activity-induced changes indirectly by the blood oxygenation level dependent (BOLD) effect. The most comprehensive model to date of the BOLD signal is formulated as a mixed continuous discrete time system of nonlinear stochastic differential equations. Previous approaches have been based on linear approximations of the dynamics,...
This work develops a supply chain network equilibrium model to solve collector location problem. A collection corporation is established in an existing four-tier supply chain network which is composed of suppliers, manufacturers, distributors and consumer markets. The collection corporation is in charge of the dismantling of discarded products, the extraction of raw materials, the final disposal in...
Digital watermarking is an efficient and promising approach to protect intellectual property rights of digital media. In this paper, a new scheme of robust audio watermarking based on Fractional Fourier transform (FRFT) domain for copyright protection is proposed, which utilizes the idea that FRFT can be considered as a rotation in time-frequency joint domain. Test results for imperceptibility of...
A method of using two-class classifiers in emotion recognition was discussed. Emotion classes were divided into pairs for improved feature selection and optimization. Each pair of emotions was classified by a two-class classifier and the final recognition result was reached by a correlation decoder. Compared with n-class classifier, using two-class classifiers for each pair of emotions is more suitable...
In this paper we introduced a multi-level threshold opportunistic transmission scheme in multiuser MIMO (MU-MIMO) downlink with reduced feedback. In the strategy two thresholds are employed. The tight one is used for feedback load reduction, and the loose one is to guarantee low outage probability. Mobile station (MS) whose channel gain exceeds one of the thresholds is eligible for feeding back information...
Bulk memory copying and initialization is one of the most ubiquitous operations performed in current computer systems by both user applications and Operating Systems. While many current systems rely on a loop of loads and stores, there are proposals to introduce a single instruction to perform bulk memory copying. While such an instruction can improve performance due to generating fewer TLB and cache...
Usually a meaningful Web topic has tens of thousands of comments, especially the hot topics. It is valuable if we congregate the comments into clusters and find out the mainstreams. However, such analysis has two difficulties. First, there is no explicit link relationship between Web comments just like those among Web pages or Blog comments. The other problem is, most of the comments are very short,...
Diverse computers interconnected via mixed network equipments are commonly available parallel architecture now, and achieve good performance/price ratio. As an important parallel communication tool, MPI system is a natural choice to support heterogeneous computing platform. The paper classifies the definition of heterogeneity into three categories, and presents the issues of them in detail respectively...
An Improved Baptista algorithm based on conservative chaotic system is proposed in this paper. During encryption, the initial value of the chaotic system is updated timely. The plaintext is divided into groups at the length of a character. In the standard map, when the integer part of y is equivalent to the value of character's ASCII code, iteration is selected as the cipher text. And before each...
This paper presents a reasoning algorithm based on interaction with fuzzy rule matrix transformation, and applies it to completing the patterns. Then the new full patterns will be used in training and synthetic judgment. The investigation shows that the method is effective and may be widely used in reasoning with incomplete knowledge.
Fuzzy measure and integral are widely used in multiple classifier system (MCS). But the number of coefficients involved in the fuzzy integral model grows exponentially with the number of classifiers to be aggregated. The main difficulty is to identify all these coefficients. This paper does an attempt Using 2-additive fuzzy measure in multiple classifier system. Our conclusion is that when different...
Larger last level caches are being considered for bridging the performance gap between the processors and the memory subsystem. It requires much longer simulation time to exercise the whole cache and get accurate evaluation results. In this paper, we motivate the need for a trace-driven hardware/software co-simulation approach to solve this problem. We describe the components of the hardware/software...
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