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The model and dynamics of a kind of buoyancy-ballast driven airship are studied. Based on Kirchhoff equations and Newton-Euler laws, we developed the six degree of freedom nonlinear dynamic model for an airship equipped with independent ballonets and ballast by analysis its movement and stress. On the condition of little perturbation, the nonlinear dynamic model is divided into three group equations...
The canoe is an event that athletes use a paddle on one side of the boat to row, by harmonizing muscle groups in upper- and lower-limbs and trunk, so research on the cooperation among human, oars and boat is most important to improve athlete's technology and performance. In this paper, we measured 7 kinematic parameters, such as force and angles (pitching and upset) of oar, speed and angles (pitching...
Carrier aggregation technique plays a significant role in LTE-A to meet the need of higher data rate, it applies a number of frequency bands to transmit signals and therefore there is a promising research arising that it is indispensable to study the characteristics of the signal at different frequencies at a receiver, in order to make the receiving equipment adjusted to the discrepancy of the receiving...
This study explores customer personality (emotional stability) and employee personality (agreeableness) as well as their interaction effect on service employee affective delivery. Data was sampled in two chain restaurants from 259 dyads customers, service employees and supervisors. Results showed that employees' agreeableness increases their affective delivery; and employees' agreeableness enhances...
With a characteristic of low utilization of queue space and network resources, the C3I Communication Network model based on the traditional Queuing Theory gets a poor real-time capability of information transmitting. In the light of this, a new model based on the Real-time Queuing Theory is proposed for managing and scheduling the transmitting of information which reduces the messages occupying the...
The Geological Database Management System is a foundation and an uniform and standard resource platform for tasks of researching, prospecting and mining, which makes those works finished more quickly and efficiently. Unified Modeling Language (UML) is a standard language in software analysis design, which is characterized by strong expression capability and can be used in the whole process of software...
Linear-spring dashpot model is one of the major contact models applied to the DEM (discrete element method) simulation of the tumbling ball mills. The model parameters such as stiffness, damping coefficient, coefficient of restitution and coefficient of friction, significantly influence the calculation of contact forces and the selection of the critical time step. However, there is no standard as...
This paper reveals a new view on mobility management based on the relations between communication users. Communication users with close relation contact each other more frequently than other users, which dominate majority of total communication traffic. The performance of these users impact the overall communication system severely. We design a new mobility management mechanism, “push-and-cache”,...
The prototyping is to realize an original model quickly according to the communication between users and developers to improve the model quality and decrease the faults. According to analyzing the basic characteristics of the mining recycling economy, a spatial decision support system (SDSS) development strategy by using the prototyping is proposed to integrate the technologies of the rapid prototyping,...
It is important to detect defects in wood, when it reduce the performance. The data and signal processing technology providing researchers with more damage identification problem solution ideas and methods. This article explore the wavelet analysis and artificial neural network for the wood defects based on non-destructive testing, and build an artificial neural network model for wood non-destructive...
This paper presents an automatic method to perform the kinematic analysis of the conceptual design schemes. Using the basic organ based kinematic analysis method, the system directly establishes the kinematic analysis model of the symbolic scheme which is generated by the design rules based computerized regeneration method. The 3D virtual assembly and simulation of the mechanism are also performed...
RFID finds wide-ranging applications in many fields. When customers decide to implement a RFID application,they are possibly confused with some technical problems while allocating tags and readers to satisfy their business requirements. Due to the environment complexity, a general RFID deployment strategy is inapplicable that means the customers must create their own specific one. A simulator for...
Clustering in routing algorithms is one of the effective solutions to enhance energy efficiency and scalability of large- scale wireless sensor networks. An energy-efficient distributed multi-level clustering algorithm (EEDMC) for wireless sensor networks (WSN) is presented. According to the local information of the networks, a node with higher residual energy and closer to the base station is more...
Based on Structural Equation Modelling (SEM), service quality, customer satisfaction and customer value which are main factors affecting customer loyalty were selected to build a model of service quality affecting customer loyalty and eight hypothesis were put forward in this paper. Demonstration research was given to check the model and hypothesis. The result showed that service quality is the key...
Recent advancement in computer hardware and software have led to an increasing amount of 3D models. Furthermore, the rapid development of WWW enables the access to 3D models constructed by people all over the world. This paper surveyed the background, state-of-the-art review and progress of content-based 3D shape retrieval, and analyzed and described several topics, including the preprocessing, coordinates...
In this paper, we present a simulation process of the melt-texture YBCO high-temperature superconductor (HTS) bulk levitated over the permanent-magnet (PM) guideway, and further experiment also been built to analyze the dynamic behavior of HTS. The relation between suspension force and amplitude of the levitation system under single-degree of freedom vibration environment was investigated, and stiffness...
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