Advanced Materials Research Vols. 204-210

Abstract: As a sort of formalizing tool of knowledge representation, Description Logics have been successfully applied in Information System, Software Engineering and Natural Language processing and so on. Description Logics also play a key role in text representation, Natural Language semantic interpretation and language ontology description. Description Logics have been logical basis of OWL which is an ontology language that is recommended by W3C. This paper discusses the description logic basic ideas under vocabulary semantic, context meaning, domain knowledge and background knowledge.

Abstract: The objective of this article is to study the order allocation problems in a stochastic supply chain. This supply chain consists of a company that can order raw materials from multiple suppliers. At any time of a supply order, decisions have to be made by the company concerning the respective supplier order quantities and price breaks, so that the total purchasing cost and disruption risk cost are minimized, while maintaining a specified service level and quality. For this purpose, we have developed an integrated multi-objective decision model under random constraint to supply order allocation.

Abstract: Currently, the research on Vehicular Ad hoc Networks(VANETs) is hot. Vehicular movement model is an important factor, which affects the simulation results of VANETs. In the simulation of VANETs, Vehicular movement model used in the urban environment should consider not only the characteristics of the vehicular movement, but also the role of obstructing the radio waves. In this paper, after a detailed analysis of vehicle motion features, it gives a vehicular movement model based on directed graph. The simulation shows that the model can well reflect the movement of vehicles in the real world, and the influence of urban environment on the network performance.

Abstract: DATA flooding attack is a serious menace for the security of on-demand routing protocol in Ad Hoc networks. In the paper, on the basis of three typical on-demand routing protocols AODV, DSR and TORA, we present a special security scheme against data flooding attack. Then we simulate the scheme on NS2 platform and compare two performance parameters before and after using the scheme: average delay and packet delivery rate. The results indicate that this project is comparatively effective to resist the DATA flooding attack.

Abstract: This paper presents the unbiased H∞ filter design for stochastic systems with data packet losses. By constructing unbiased filter, the complexity and computational burden of the real-time filtering process are reduced greatly. Delay-dependent sufficient conditions for stochastic system with data packet losses are proposed in terms of linear matrix inequalities (LMIs). Numerical example demonstrates the proposed approaches are effective.

Abstract: The previous discussion about type-2 fuzzy reasoning mechanisms just paid attentions to Mamdani models based on Mamdani implication operator. There is no doubt that the operator is justifiable, since such an operator possesses characteristic clipping effect, i.e. limiting the consequence membership function with the truth value of the antecedent. However, Mamdani implication operator does not uphold classical logic, i.e. it is in no agreement with the classic binary interpretation of implication. All of the Kleene-Dienes operator, Lukasiewicz operator, Zadeh operator and Reichenbach operator, which derive from equivalencies of the classic binary implication, have in common the feature of generalizing classic logic. This paper investigates type-2 fuzzy reasoning models and algorithms based on these four implication operators, respectively. In the view upholding classical logic, proposed models and algorithms seem to be more natural than of the Mamdani type.

Abstract: Expand the self-awareness and self-(decision-making) ability of agent, unify the definition about process, resource and service, then this paper builds volunteer-oriented agent internetware service logic, and designs the formal models’ design related to corresponding volunteer computing, furthermore, researches for its method sequentially. About architecture-centric service system, it is achieved as volunteer granularities and interactive relationship. On this basis, it gets to improve transparency of architecture about business implementation and autonomous ability of analysis decision-making.

Abstract: Initial stress anchor wire anchoring technology has the merits of fast speed, small perturbation and economic when healing unstable rock side slope. Choosing the spacing, position, angle of reinforcement anchor wire plays a vital role in reinforcement stability and economy. The landslide of an open pit was elected as project background in this paper. Operation model was set up by Lagrange arithmetic which analyzed the reinforcement mechanic and broken pattern of anchor wire. And it defined that the optima spacing is 8m. The anchor wire reinforcement angle and institution position research were researched by using limit balance theory. The optimum design angle obtained is -20°~20°, and the optimum institution position is in the range of 1/5~1/2 of the lower reinforcement side slope height.

Abstract: Parameters selection plays an important role for the performance of least squares support vector machines (LS-SVM). In this paper, a novel parameters selection method for LS-SVM is presented based on chaotic ant swarm (CAS) algorithm. Using this method, the optimization model is established, within which the fitness function is the mean square error (MSE) index, and the constraints are the ranges of the designing parameters. The proposed method is used in the identification for inverse model of the nonlinear systems, and simulation results are given to show the efficiency.

Abstract: This paper studies how to design a mechanism to control the quality of final product and components. Considering that ATO supply chain is composed of multiple component suppliers and a manufacturer, which is the core company and uses incoming inspection and quality tracing to control the quality of components, we presented a quality control model of ATO supply chain and obtain the optimal quality control mechanism consisting of component purchase prices, penalties on defect. We find that the manufacturer will choose the optimal quality level of ATO supply chain; the manufacturer can stimulate suppliers to choose the optimal quality levels of ATO supply chain through designing a reasonable purchase prices and penalties when their reservation payoffs are small, otherwise, it will design a profit transfer mechanism to modify the quality control mechanism, as a result, suppliers will choose the optimal quality levels and the manufacturer’s profit will be maximized.