Abstract UAV remote sensing is characterized by fast speed and flexibility and applied widely. The extraction and matching for feature point of UAV image is a foundational work in the application of UAV remote sensing. SIFT is a currently widely used feature point extraction algorithm that keeps invariant as the scale changes. It is also invariant as image changes in other... UAV remote sensing is characterized by fast speed and flexibility and applied widely. The extraction and matching for feature point of UAV image is a foundational work in the application of UAV remote sensing. SIFT is a currently widely used feature point extraction algorithm that keeps invariant as the scale changes. It is also invariant as image changes in other aspects. Meanwhile it maintains certain stability to noise and light changes. SIFT is a kind of compute-intensive mission and usually takes much time. The author made parallel processing for SIFT algorithm and good accelerator ratio has been achieved on the premise of ensuring good result of feature point extraction and matching. Read More Read Less

Abstract During its traversal of the Web, crawler systems have to deal with multiple challenges. Some of them are related with detecting garbage content to avoid wasting resources processing it. Soft-404 pages are a type of garbage content generated when some web servers do not use the appropriate HTTP response code for death links making them to be incorrectly identified. Our... During its traversal of the Web, crawler systems have to deal with multiple challenges. Some of them are related with detecting garbage content to avoid wasting resources processing it. Soft-404 pages are a type of garbage content generated when some web servers do not use the appropriate HTTP response code for death links making them to be incorrectly identified. Our analysis of the Web has revealed that 7.35% of web servers send a 200 HTTP code when a request for an unknown document is received, instead of a 404 code, which indicates that the document is not found. This paper presents a system called Soft404Detector, based on web content analysis to identify web pages that are Soft-404 pages. Our system uses a set of content-based heuristics and combines them with a C4.5 classifier. For testing purposes, we built a Soft-404 pages dataset. Our experiments indicate that our system is very effective, achieving a precision of 0.992 and a recall of 0.980 at Soft-404 pages. Read More Read Less

Abstract The paper introduces the EA (electric acupuncture) treatment system based on expert database diagnosis technique. The system is a expert database of automatic reasoning diagnosis by the combining the maximum likelihood method and relation database. It integrates symbolic measurement theory, computer technology and electronic technology, which develops EA needling method by imitating classical acupuncture techniques. The system effectively achieves the... The paper introduces the EA (electric acupuncture) treatment system based on expert database diagnosis technique. The system is a expert database of automatic reasoning diagnosis by the combining the maximum likelihood method and relation database. It integrates symbolic measurement theory, computer technology and electronic technology, which develops EA needling method by imitating classical acupuncture techniques. The system effectively achieves the integration of diagnosis and treatment. Read More Read Less

Abstract Vigorous development of computer technology has made computers play an integral role in people's lives, but at the same time propagation of the virus on a computer network also cost a great loss to the people. So the research on the mechanism of computer virus propagation and pointing out the key factors in the propagation of the virus has a... Vigorous development of computer technology has made computers play an integral role in people's lives, but at the same time propagation of the virus on a computer network also cost a great loss to the people. So the research on the mechanism of computer virus propagation and pointing out the key factors in the propagation of the virus has a significant influence on the prevention of computer virus and can also promote the development of relevant policies. The paper researched the influence of the user re-login frequency, the average number of friends on the user's friend list and the initial spread rate of the virus on the social networks during the epidemic of the propagation of the computer virus. By the means of mathematical analysis, an SEIR model to describe the epidemic of the virus on the online social network is established in this paper. The research shows that the re-login frequency of the user and the average friend number of the user would make a significant influence on the virus propagation. The two factors enhance the risk of a virus outbreak in the social network, at the same time. Read More Read Less

Abstract As economic globalization and information industry develop at top speed, Internet has penetrated into all walks of life rapid, with an immeasurable impact on all aspects of people's life. Computer technology is an integral part in the evaluation of audit system, technically prepared for application of cloud data structure in the evaluation of audit system. Based on the concept of... As economic globalization and information industry develop at top speed, Internet has penetrated into all walks of life rapid, with an immeasurable impact on all aspects of people's life. Computer technology is an integral part in the evaluation of audit system, technically prepared for application of cloud data structure in the evaluation of audit system. Based on the concept of Internet cloud data structure, this paper constructs a new audit system evaluation model. Firstly, it performs a theoretical analysis of Internet cloud data structure audit system; then it explores applications of cloud data structure audit system; finally, feasibility of cloud data structure audit system is evaluated by means of AHP and fuzzy analysis. It is found that the system has incomparable superiority in audit practices. Read More Read Less

Abstract Introducing ontology in the field of information extraction can effectively improve the performance of information extraction. Ontology of college teachers resumes are constructed in the form three layers of ontology framework structure on the basis of exploring the related technologies and criterion for building ontology, the Racer inference engine is used for realizing the consistency and accuracy detection. WordNet similarity... Introducing ontology in the field of information extraction can effectively improve the performance of information extraction. Ontology of college teachers resumes are constructed in the form three layers of ontology framework structure on the basis of exploring the related technologies and criterion for building ontology, the Racer inference engine is used for realizing the consistency and accuracy detection. WordNet similarity calculation method is improved on the basis of this, so that manual collection method can be integrated into WordNet semantic similarity, thus substantially improving this method. The test shows that the result precisions based on WordNet ontology construction and information extraction both see significant improvement, which sufficiently shows the feasibility and validity of the method. Read More Read Less

Abstract The paper firstly proposes two factors influencing transmission rate of satellite data file, the number of files and threads. The paper uses the control variate method to design the test scheme of the transmitting satellite data file, and changes the values of variables for lots of repeated tests to achieve the mean transmission time. And the paper compared the file... The paper firstly proposes two factors influencing transmission rate of satellite data file, the number of files and threads. The paper uses the control variate method to design the test scheme of the transmitting satellite data file, and changes the values of variables for lots of repeated tests to achieve the mean transmission time. And the paper compared the file transmission rate under three different variables, which draws the conclusion that the transmission efficiency of using single-file and multi-thread variable combination is the best. And the paper makes deep study on the selection of the number of threads. In the test environment of network delay of 50ms, the transmission time of using 3 or 4 threads to transmit data files is short, which proves that the number of threads transmitting files needs to be determined by the network environment. Read More Read Less

Abstract In the social network, people with same interest construct a group, where people can share their interesting contents. With the popularity of the mobile devices, mobile users can connect to the internet for services such as downloading videos, music and pictures anywhere at any time, which may cause heavy traffic burden on the core network. The service content (eg. video,... In the social network, people with same interest construct a group, where people can share their interesting contents. With the popularity of the mobile devices, mobile users can connect to the internet for services such as downloading videos, music and pictures anywhere at any time, which may cause heavy traffic burden on the core network. The service content (eg. video, picture, music) downloaded and shared in the same social network interest group may always be similar, which may lead to repeated traffic transmitted in a short time period; on the other hand, the size of the service content may be very large for a single user, which will take it along time and spend much money to finish a complete service request or sharing. It is necessary to study how to reduce the requests in internet from the mobile users to reduce the flow on the core network, as well as reducing the economic cost and the service time, which is the main motivation of our research. Based on the universal mobile social network architecture, this paper proposed CAMPSNA: a cloud assisted mobile peer to peer social network architecture. In which, the cloud center is introduced to help the mobile devices offloading complex tasks to the cloud. The end devices in the architecture construct a local mobile peer to peer network to share their existing content based on their social relationships to reduce the burden of the cloud center. Read More Read Less

Abstract Development of big data computing has brought many changes to society and social life is constantly digitized. How to handle vast amounts of data" has become a more and more fashionable topic. Hadoop is a distributed computing software framework, which includes HDFS and MapReduce distributed computing method, make distributed processing huge amounts of data possible. Then job scheduler determines the... Development of big data computing has brought many changes to society and social life is constantly digitized. How to handle vast amounts of data" has become a more and more fashionable topic. Hadoop is a distributed computing software framework, which includes HDFS and MapReduce distributed computing method, make distributed processing huge amounts of data possible. Then job scheduler determines the efficiency of Hadoop clusters and user experience. Under the premise of familiar with the mechanism of Hadoop's running tasks, make a full analysis of the existing Hadoop task scheduling algorithm, such as FIFO-Scheduler, Capacity Scheduler, FairShare-Scheduler and LATE-Scheduler, found that the existing scheduling algorithms do not perceive the performance of the computing node, so that it cannot assign different tasks depending on the machine performance in heterogeneous Hadoop cluster. Read More Read Less

Abstract In existing trust models, the recommending services often provide a single trust value (computed by them during their interaction with the unknown entity in question) as a recommendation. However, a single trust value recommended by a recommender represents its subjective opinion about the unknown entity and cannot depict the real trust level very well under certain circumstances. To solve this... In existing trust models, the recommending services often provide a single trust value (computed by them during their interaction with the unknown entity in question) as a recommendation. However, a single trust value recommended by a recommender represents its subjective opinion about the unknown entity and cannot depict the real trust level very well under certain circumstances. To solve this problem, a fuzzy based credibility evaluation method for indirect trust computation is proposed. The calculation method cannot just incorporate a mechanism to determine the weight each valid recommendation should carry on aggregation process, but also distinguish between honest and dishonest recommendations in the meantime. Read More Read Less