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.
A novel model about the local-world linear expanding evolution of wireless sensor networks(WSNs) has been put forward in the basis of the classic BA scale-free model. The four types of internal evolving behaviors in wireless sensor networks are reflected in the dynamic process of the model. With the application of continuous field theory, the characteristics of network nodes' degree distribution are...
Cognitive radio is a new technology, which has received increasing interest in an attempt to alleviate the spectrum scarcity issue. In this paper, we propose a new metric indicating user satisfaction function, which takes transmission rate, transmission power and perception contribution into account. And use it as the utility function, joint channel and power allocation algorithms are designed by...
In this paper, the 250MW generator in Wuqiangxi power station is studied. The solved region and mathematical model are given and the additional losses of the rotor pole surface and damper windings under rated voltage and no-load were calculated by the time stepping finite element method. Two situations are considered for calculating the additional loss of the damper windings. One is that the additional...
This paper proposes an self-learning fuzzy control method based on an improved radial basis function neural networks (RBFNN). The architecture of the proposed approach is comprised of a fuzzy controller and an RBFNN. For such an architecture, firstly, an analytical formula is employed to design fuzzy controller. Then, RBFNN based on an efficient locally regularized forward recursive (LRFR) algorithm...
Cloud provides a shared resource pool for different independent or dependent applications. The virtualization techniques and power management techniques can enhance the flexibility with consolidate multiple virtual machines on the physical server. A key challenge is to automate the management of virtual servers while taking account of application requirements, resource utility and so on. This paper...
The development of technology and improvement of living quality lead to the increase in demand for the diversity of functions of set-top box (STB). In this paper, a service of virtual experience of wearing clothes is introduced to the STB, which aims at offering a subjective perception of dynamic thermal comfort to the customers who want to buy clothes through STB. The implementation of this service...
Langmuir probe is an important instrument for detecting space plasma, used in sounding rocket project in Meridian as one of payload at present. This article describes the automatic gain linear micro-current measurement circuit used in Langmuir probe, which can linear measure tiny current between 50pA to 500uA in multi-gain range. Its working principle is that firstly the circuit real-time monitors...
Three-dimensional fuzzy logic controller (3-D FLC) is a novel FLC developed for spatially-distributed parameter systems. In this paper, we are concerned with data-based 3-D FLC design. A table look-up scheme is employed to design 3-D FLC in terms of input-out pairs. The design is composed of five steps, including division of data space, generation of fuzzy rules, degree assignment of rule, combination...
In this paper, the entrepreneur BDI model in different entrepreneurial environment is constructed by consulting previous studies, and the entrepreneur BDI model based on the Fuzzy Wavelet Neural Networks is also set up by combining artificial neural network theory with wavelet analysis and fuzzy evaluation. With wavelet function as fuzzy membership function in this model, fuzzy inference can be conducted...
Goal scoring is the main objective of the robot soccer game. This paper presents strategies of shooting for robot soccer systems. Using an algorithm based on fuzzy logic, we employ an arbiter to identify the most suitable shooter in a soccer team when attacking. We also propose an algorithm based on artificial potential field to plan an appropriate path for the chosen shooter. In the games, the team...
Voice conversion is a technology by modifying the source personality to mock the voice of target. This technology has a wide prospect and potential technical value both in technical field and entertainment, such as text to speech (TTS) and toys. This paper develops an improved voice conversion method. For the voiced frames, the conversion is implemented by Gaussian mixture model (GMM) based on speech...
Semantic similarity calculating has become a widespread topic in the field such as artificial intelligence, natural language processing, information retrieval and so on. WordNet is an English lexical database for synsets and relations. It is simple and effective to calculate the similarity between concepts in WordNet. Five semantic similarity methods based on WordNet are discussed in this paper. By...
This paper defines for standardization a particular adaptive source coding algorithm that has widespread applicability to many forms of digital data. In particular, the science data from real time systems of imaging or non-imaging instruments are well suited for the application of this algorithm, which based on the Rice algorithm, as recommended by the CCSDS (Consultative Committee for Space Data...
s the performance and size of computing facilities and associated data services continue to increase, the management of computing systems within data centers is becoming a significant challenge. This paper analyzes the characteristics of services in the Scientific Data Center of the Chinese Academy of Sciences. To capture the service characteristics, the paper describes three computing system architectures...
The cause of air accidents and results are difficult to control. The obstacle comes from the insufficient knowledge for cognition, judge and operate. The events of the accidents of the two types of supper sonic passenger transporter(SSPT) is studied, and then the twins mathematic model is derived, to explore the similarity knowledge for recognizing the risk, management, control and operation. The...
Dynamic rules acquisition is a topic of general interest in the field of association rules mining. Many existing incremental mining algorithms are Apriori-based, which are not easily adoptable to mine tree-based frequent patterns. In this paper, we provide a novel incremental updating algorithm IULFP for mining association rules. We use the layered frequent pattern tree based structure to store frequent...
A new data encryption algorithm based on dual chaotic system, DCS-EA, was presented in this paper. DCS-EA is a stream cipher algorithm that introduced three new techniques in order to heighten the data security. First, it used two simple Logistic mappings with different system parameters and initial value of variable, which can create more complex chaotic signals to insist the threat of chaotic reconstruction,...
With the rapid development of the multimedia technology and Internet, content-based image retrieval (CBIR) has become an active research field at present. Many researches have been done on visual features and their combinations for CBIR, but few on the performance comparison of different visual feature combinations. Therefore, in the paper, different visual feature combinations are firstly compared...
System pressure valve is very important for the performance of 8-speed automatic transmission (8AT). The new system pressure valve of 8AT in front-wheel drive (FWD) is designed and simulated by ITI-SimulationX, its performance such as pressure and flow of system pressure valve were analyzed and optimized in a whole power train system including hydraulic system, mechanical system and control system...
This paper presents a system for counting the number of the pedestrians and the cars passing through a line, with an improved virtual gate method. First, the foreground area is extracted using GMM-based background modeling. Second, the velocity field in the foreground regions are computed by an improved optical flow estimation method, which enables the estimation of the dense velocity field of the...
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.