In order to extend the sensor’s lifetime, this paper researched deeply into the sleep scheduling mechanism in the distributed sensor network. Now, the commonly used sleep scheduling methods based on the coverage have...
详细信息
Automatic image annotation is a very essential technology cause the huge development of the multimedia and Internet. Recently, many approaches change multi-label annotation problem to single-label annotation problem w...
详细信息
Automatic image annotation is a very essential technology cause the huge development of the multimedia and Internet. Recently, many approaches change multi-label annotation problem to single-label annotation problem while they are always time-consuming and useless to some extent. In this paper, we propose an enhanced region semantic analysis algorithm for scenery images annotation. It contains segmentation, clustering and mapping processes. We use the classical segmentation algorithm: normalized cuts and cluster patches with feature weight selection. Finally we relate cluster centers and keywords using statistical method. Experimental results show that our algorithm achieves promising performance with the scenery images and outperforms region semantic analysis algorithm on the same benchmark datasets.
Intelligent Lighting is the development direction of urban municipal lighting construction. IPv6 technology is considered as the key to solve the problems such as point light source controlled separately, multi-scene ...
详细信息
Intelligent Lighting is the development direction of urban municipal lighting construction. IPv6 technology is considered as the key to solve the problems such as point light source controlled separately, multi-scene controlled flexible and user-friendly, control signal with minimal latency, plug and play heterogeneous devices, green energy and so on. In this paper, we introduce the IPv6 into the intelligent lighting system;build the communication model from three aspects which are information model, information exchanging model and general protocol according to the characteristics of information transmission in intelligent lighting system. At last, the usability of the communication model is analysed and verified by the landscape lighting control system which deployed in the Olympic central area.
DTNs are prone to congestion due to limited resource on each node and unpredictable end-to-end delay. We aim to develop an effective congestion control mechanism in this paper. For this purpose, we first identify a li...
详细信息
DTNs are prone to congestion due to limited resource on each node and unpredictable end-to-end delay. We aim to develop an effective congestion control mechanism in this paper. For this purpose, we first identify a list of major congestion factors by analyzing the causes of congestion. We then model the congestion control as a multiple attribute decision making problem (MADM), in which the weight of congestion factors is measured by an entropy method. To solve this problem, we present a MADM-based congestion control mechanism that determines a set of forwarding messages and its transmission order on each encounter event. Moreover, we design a buffer management scheme that deletes messages whose removal would incur the least impact to the network performance when the buffer overflows. Extensive real-trace driven simulation is conducted and the experimental results finally validate the efficiency of our proposed congestion control mechanism.
As we know,GUI(Graphical User Interface) is an important and indispensable element in software. GUI test also becomes very important. Nowadays,there are some shortcomings in many model-based automatic test cases gener...
详细信息
As we know,GUI(Graphical User Interface) is an important and indispensable element in software. GUI test also becomes very important. Nowadays,there are some shortcomings in many model-based automatic test cases generation. In this paper,we introduce the event-flow model,obtain a parameter event-flow model(PEFG) after improvement,and design a simplified algorithm in order to reduce the number of generated test cases,improve the quality of test cases,and reduce test execution cost.
With the development of the Internet,people share their emotion statuses or attitudes on online social websites,leading to an explosive rise on the scale of *** sentiment information behind these data helps people kno...
详细信息
ISBN:
(纸本)9781479948109
With the development of the Internet,people share their emotion statuses or attitudes on online social websites,leading to an explosive rise on the scale of *** sentiment information behind these data helps people know about public opinions and social *** this paper a sentiment analysis algorithm adapting to Weibo(Microblog) data is *** that a Weibo post is usually short,LDA model is used to generate text features based on semantic information instead of text *** decide the sentiment polar and degree,SVR model is used *** shows the algorithm performs well on Weibo data.
In Delay Tolerant Networks (DTNs), the connections between mobile nodes are intermittent and constant end-to-end paths rarely exist. In order to achieve high delivery ratio, most existing DTN routing algorithms favor ...
详细信息
Recently software crowdsourcing has become an emerging area of softwareengineering. Few papers have pre- sented a systematic analysis on the practices of software crowdsourcing. This paper first presents an evaluatio...
详细信息
Recently software crowdsourcing has become an emerging area of softwareengineering. Few papers have pre- sented a systematic analysis on the practices of software crowdsourcing. This paper first presents an evaluation frame- work to evaluate software crowdsourcing projects with re- spect to software quality, costs, diversity of solutions, and competition nature in crowdsourcing. Specifically, competi- tions are evaluated by the min-max relationship from game theory among participants where one party tries to minimize an objective function while the other party tries to maximize the same objective function. The paper then defines a game theory model to analyze the primary factors in these min- max competition rules that affect the nature of participation as well as the software quality. Finally, using the proposed eval- uation framework, this paper illustrates two crowdsourcing processes, Harvard-TopCoder and AppStori. The framework demonstrates the sharp contrasts between both crowdsourc- ing processes as participants will have drastic behaviors in engaging these two projects.
software architecture (SA) documentation provides a blueprint of a software-intensive system for the communication between stakeholders about the high-level design of the system. In open source software (OSS) developm...
详细信息
software architecture (SA) documentation provides a blueprint of a software-intensive system for the communication between stakeholders about the high-level design of the system. In open source software (OSS) development, a lack of SA documentation may hinder the use and further development of OSS, but how much "architecture" documentation is enough and appropriate is largely dependent on the contextual factors of development. In order to understand the state of the practice of SA documentation in OSS projects, we conducted a documentation-based survey to explore how SA is documented in OSS projects. Out of 2,000 OSS projects from four major OSS sources, we found that 108 projects have some SA documentation, which shows that the SA documentation is scarce in OSS development. We analyzed these 108 projects to understand what SA information has been documented and how they have been described. We have found that frequently-documented architectural information is model, system, and mission, natural language is the most frequently-used architectural language for specifying architectural information in OSS SA documents. The results also show that the likelihood that an OSS project will document SA is increased when more developers are involved in the project, and industry and research OSS projects are more likely to create SA documents than freelance projects.
A feedback vertex set is a subset of vertices, such that the removal of this subset renders the remaining graph cycle-free. The weight of a feedback vertex set is the sum of weights of its vertices. Finding a minimum ...
详细信息
暂无评论