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A preconditioned SOR iterative method with a preconditioner is proposed. The comparison result is given when the coefficient matrix of linear system is a nonsingular M-matrix. Numerical example shows that our method is superior to the basic SOR iterative.
The three-dimensional temperature field of the coal-bed methane with heat injection was numerically calculated by ANSYS. The calculated results revealed that the temperature, the thermal gradients and the thermal flux vector sum of the coal-bed near the injection well was higher, while was smaller at the other area of Coal-bed Methane (CBM), which indicated that the coal-rock was not affected by heat...
Interpolation methods are very popular in many practical areas. While, some times we do not know the exact value of the measured quantities, because of the inevitable measurement inaccuracy. However, we can describe the uncertainty by using fuzzy numbers. In this paper, the polynomial interpolation of trapezium fuzzy numbers is discussed. First, a general form of the polynomial with fuzzy coefficients...
This paper based on the traditional learning resources of collaborative-filtering personalized recommendation systems exist sparse and cold start is put forward based on the personal learning resources study migration recommend model, study method can move from existing data transfer knowledge, to help the new knowledge in the future study. E-Learning environment, use of knowledge transfer for learners...
With the development of the Internet and computer, more and more Tibetan documents have brought large amounts of information. With time, the amount of data available has become so vast that we need ways to find information. In this paper, we discuss the Tibetan word structure and encoding, and implement a Tibetan search engine system using XML documents. Testing shows the searcher can find the Tibetan...
According to the actual arrangement condition of the grid maintenance scheduling in Lanzhou Power Grid, which has formed the database of high normative and strong consistency, the knowledge-base can be constructed by applying the expert system technique. Besides that, basic data of maintenance scheduling can be intelligently analyzed and adjusted by using active rule model, finally maintenance scheduling...
Using variational approach in the effective mass approximation, the hydrogenic donor impurity binding energy is investigated in detail in cylindrical GaAs/Ga1-xAlxAs quantum dot in the presence of an electric field applied along the growth direction of the quantum dot (QD). The binding energy increases gradually, reaches a maximum value, and then decreases quickly to the special value as the QD radius...
The problem existing in the gripper part of the boxing machine is analyzed to put forward a design of bidirectional-regulation gripper mechanism, to carry out the design of pneumatic and mechanical part and to specifically illustrate the structure composition, operating principle and packing technology of the mechanism. The result shows that the bidirectional-regulation gripper mechanism can properly...
Standard SVM training has O(m3) time and O(m2) space complexities, where m is the training set size. It is thus computationally infeasible on very large data sets. The author first reviewed the standard minimum enclosing ball (MEB) problems in computational geometry and presented the extensions of minimum enclosing ball problem, Then proposed a novel SVM algorithm-extension core vector machine algorithm...
In view of the characteristics of chemical industry process's nonlinearity and time delay, a novel fuzzy immune PID control method was proposed. It adjusts the PID controller's parameters based on the biological immunity principle, and fuzzy reasoning is used to realize the nonlinear immunity feedback function. By this way, the fuzzy immune PID controller can adapt that the pH value changes in large...
Aiming at the designed defects of the traditional wireless network node, a kind of designed scheme of wireless network coordinator based on ZigBee and GPRS technology are proposed. The system uses LPC2119 as the core and uC / OS - II as operating platform. It realizes the establishment and management of ZigBee network, the data communications between ZigBee network and GPRS network. The system can...
In view of the pool real-time interaction performance in the EAM systems based on web services, the effective solution based on serialization and data compression is proposed. The Remoting Format in. NET 2.0 frameworks is used to serialize and compress Data Set transferred between web services to improve the real-time interaction performance in system. The result demonstrates that, the schema can...
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