The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Map matching, as one of the key steps, is widely used in navigation, estimation of traffic flow, path planning, etc. With the emergency of large traffic track data, the demand for matching speed is becoming higher and higher. This paper describes a method of map matching based on grid index, which is used to quickly get the closest K candidate sections to improve the speed of map matching. When establishing...
A binary de Bruijn sequence with period $2^n$<alternatives> <inline-graphic xlink:href="yang-ieq1-2676763.gif"/></alternatives> is a sequence in which every tuple of $n$<alternatives> <inline-graphic xlink:href="yang-ieq2-2676763.gif"/></alternatives> bits occurs exactly once. De Bruijn sequence generators have randomness properties that make...
With the amount of data increasing rapidly, how to improve the scalability of nonlinear clustering has become a very crucial and challenging problem. In this paper, we design an efficient parallel nonlinear clustering algorithm by using a four-stage MapReduce framework. In our approach, we need to compute two quantities based on distance matrices, which, however, is difficult to compute in a MapReduce...
Recently, high dynamic range (HDR) image which can accurately reflect the real scene prompts increasing interest. For visualizing the HDR images on standard display devices, it is needed to convert it to low dynamic range (LDR) images. This process is named as tone-mapping. Due to the reduction of the dynamic range, evaluating the tone-mapped image becomes important. Gradient magnitude measure has...
With the rapid development of power system and the integration of renewable energy sources, the uncertainties of power system become more complex, which introduce a more challenging for the assessment of voltage stability. This paper presents an analytical solution of static voltage stability assessment based on the PQ plane analysis method with elaborately selected voltage stability indices, and...
In this paper we investigate the s groups consensus problem by giving a kind of new protocol in directed networks with fixed topology. The sufficient conditions which group consensus can reach under the given protocol are obtained and the consensus process could be controlled because of the newly added feedback controllers in our protocol. Then the dynamic performance of our protocol is discussed...
This research extends traditional cokriging method from spatial domain to spatio-temporal domain for assimilating spatial data sets with different temporal sampling frequency and spatial resolution (density). The main advantage of spatio-temporal cokriging lies in the fact that it takes into account the spatial covariance, temporal covariance and spatiotemporal covariance structures in the spatio-temporal...
To investigate the CT findings of gastrocolic ligament involved by acute pancreatitis(AP) and study the correlation between CT findings and CT Severity Index (CTSI) of AP. Methods: Seventy-nine patients with AP were retrospectively reviewed. Balthazar's CT classification of all the patients' was C grade or more. Emphasis was placed on the following findings: the CTSI, the thickness and density of...
This study was designed to investigate the relationship between cross-cultural conflict and the capability of strategic positioning in transnational enterprises. In this paper, a structural equation model and a questionnaire survey were presented to analyze the relationship, and the results showed that the cross-cultural conflict is negatively impacted the capability of strategic positioning, especially...
Participatory sensing is becoming more popular with the help of sensor-embedded smartphones to retrieve context-aware information for users. However, new challenges arise for the maintenance of the energy supply, the support of the quality-of-information (QoI) requirements, and the generation of maximum revenue for network operator, but with sparsely research exposure. This paper proposes a novel...
In this paper, we propose an efficient energy-management framework in wireless sensor networks (WSNs) to address the fundamental research challenge imposed by both the maintenance of the energy supply and the support of the quality-of-information (QoI) requirements. By quantifying the QoI benefit the tasks receive in relation to the level of QoI they request as the QoI satisfaction index), we propose...
This paper proposed a information search and maintain method for peer-to-peer network, in order to enable users to search and download internet information, the paper described the method to set up a peer-to-peer network first, then described the technology of collecting and sharing information under this network, researched and realized the method of information search and maintain, finally the paper...
An intrusion detection system (IDS) implements pattern matching approach on the network traffic to find the malicious packets carrying attack signatures. In this paper, a common field programmable gate array (FPGA) based on-board hardware architecture which is compatible with both ordinary string and perl compatible regular expression (PCRE) pattern matching is proposed to accelerate IDS. Furthermore,...
M & A between companies go up quickly in the past 20 years in China, M & A performance is focused gradually, and the study on the measurement of M & A performance becomes more and more important. This paper researches the M & A happened in 2004 of 92 Chinese A-share listed companies, uses the improved assets yield of net cash flow to measure performance before and after the acquisition,...
The term of social network communities refers to groups of individuals within which social interactions are intense and between which they are weak. A social network community mining problem (SNCMP) can be stated as the problem of finding all such communities from a given social network. A wide variety of applications can be formulated into SNCMPs, ranging from Web intelligence to social intelligence...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.