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.
Recently, security of cognitive radio (CR) is becoming a severe issue. There is one kind of threat, which we call greedy spectrum occupancy threat (GSOT) in this paper, has long been ignored in previous work. In GSOT, a secondary user may selfishly occupy the spectrum for a long time, which makes other users suffer additional waiting time in queue to access the spectrum and leads to congestion or...
With the dramatic growth of E-commerce's popularity, the amount of products and services reviews are increasing rapidly. Many researchers put effects on mining user opinions from reviews. There are many research works in opinion mining. However, all current methods are focusing on how to handling the opinion mining for English language, Chinese, Japanese and so on. There lacks works on how to conduct...
In recent years, Community Question Answering (CQA) service becomes more and more popular, which enables users to ask and answer questions on the web. One important problem is how to find out experts who are qualified and willing to answer the question. Also, with the rapidly increasing number of new questions, experts of experienced in specified domains are not easy to find their interested questions...
Particles with dimension less than 2.5μm (PM2.5) pose a notable health risk. Potentially, airborne PM2.5 particles can penetrate deep into t h e human respiratory system. Electrostatic precipitation of fine and ultra-fine particulate matter, including a n impulsive micro-electrostatic precipitation technology [1], is prove n to be an efficient method for air cleaning in industrial and domestic environments...
Power plants, internal combustion engines and other sources produce micron and sub-micron particles, which contaminate the air. This problem is faced mainly in large cities where both population and industrial activities are higher leading to significantly reduced air quality. Recent research has pointed out particles less than 2.5 μm in diameter (PM2.5) as a potential health hazard. In the light...
Aiming to the defects in the traditional speed-control of rotary screen rack, such as poor dynamic performance, poor noise immunity, untimely regulation and strong dependence on personnel and experience and so on, this paper proposes a linear quadratic regulator with status feedback, which was used in the constant-speed control of LHG type rotary screen rack. It can be easily and quickly solve riccati...
This paper presents an implementation of the Qt4 test bench based on ARM9. With Linux as the operating system, based on ARM9 system board, Qt4 test bench is implemented and completes the corresponding tests. The process of the implementation combining the build of compiler environments, the kernel transplant, the production of the root filesystem, drivers installation, and the process of Qt/Embedded...
This paper introduced the extension method and established a danger evaluation matter-element model based on debris flow surveying data of Miyun county. The research indicates that it is reasonable and feasible for using extension method in danger division of valley debris flow. It can reflect each factor's influence on danger of valley debris flow. This paper used simple correlation function to determine...
This paper introduces a simulation and training systems of protective relaying based on competent technology, which takes fault filter data and simulation data as data sources. Visual C++ programming language is used for data modeling base on IEC61850 standard. A base model describing the function of protection and control devices and the principle of action logic and its training applications are...
Existing service marketing literature has not yielded consistent findings regarding the impact of customer satisfaction on service performance. Based on role stress theory, this study aims to explain those different findings, developing a conceptual framework to recognize three interactive characteristics of customer participation (interpersonal interaction, interdepartmental encounter, and task interdependence)...
We propose a group location management scheme used for passenger dedicated lines, in which mobile users with same moving trend are combined as a group. In the scheme, each group is identified by a group ID Gi, and implements unified location management process though a group proxy deployed on the train. Thus in the network side, instead of modifying each user's location information separately, the...
According to the new execution of 2010 International cardiopulmonary resuscitation (CPR) & Emergency Cardiovascular Care (ECC) Guide Standard above American Heart Association(AHA), this paper designs the main control system and the measurement system of CPR Simulation Control System based on SCM LPC932 and SCM LPC935. According to the strength of artificial respiration and cardiopulmonary press...
Topic Detection is a sub-task of Topic Detection and Tracking, its main task is to find and organize topics that system didn't know. By analyzing hundreds of website news reports, we find that usually there exist some keywords in text, and early study didn't pay enough attention to this, we propose a topic detection algorithm according this. The algorithm is based on K-means clustering algorithm,...
The teaching reform and exploration have been taken in the course of introduction to biotechnology for developing the innovation, practice ability and professional skills. The content system and organization way of this course had been adjusted by the educational thought of Blending Learning. Lots of teaching methods were adopted, such as diverse forms of classroom instruction, optimizing the experimental...
In this paper, principles of management systems are being converted to the corresponding fuzzy logic rule, and the behavior of employees can be predicted in the parallel systems, at the same time, the principles of management systems are modified and improved continuously and then form dynamic fuzzy rule base bank, at last the linguistic dynamic orbits of employee behavior are achieved.
To study mechanical properties and impact on components for existing concrete of different service life, uniaxial compression tests for existing un-carbonated concrete serviced 10, 20, 40 years respectively were carried out, and 14 complete stress-strain curves were obtained. Test results showed that The mechanical properties on elastic modulus, ductility, peak strain, ultimate strain and transverse...
For the current open, dynamic and ever-changing Internet environment, select the security, integrity, trusted, software coordination entity with reliable quality of service has great difficulty, Internetware service entity is difficult to ensure the other's trusted in mutual coordination. Trusted relationship between software entities for the trust of Internetware has important significance. This...
Power/Ground plane structure is the best configuration of the modern plane power distribution system. But in the high speed circuit, the resonant modes of the P/G planes can be excited when the high speed signal changes the reference plane. Thus it brings the GBN and SSN problems. This paper presents a novel Electromagnetic Bandgap Structure which can suppress the high frequency and ultra-high frequency...
This paper presents a fuzzy spiking neural P system (FSN P system) to represent the fuzzy production rules in a knowledge base of a rule-based system, where the certainty factors of fuzzy production rules and the truth values of propositions are described by trapezoidal fuzzy numbers. In the proposed FSN P system, the definition of traditional neurons has been extended. The neurons are divided into...
In this paper, we first discuss the current conditions of education on software engineering talents. Then we recommend an example adopted by school of computer in Hubei University of Economics, in which we address the education model of talents training, and raise the opinion that education model of software engineering must orient vocation and utilize the iterative approach. To the end, we summarize...
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.