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In this article, course study and reform on teaching The Principles of Database System is demonstrated from three aspects: class teaching, experimental teaching, and course design. Class teaching is enhanced by considering integration of course content, flexibility and inspiration in teaching style, motivation derived from problem solving and case study. For experimental teaching, the article puts...
Scientific planning, correct implementation and stable operation are fundamental to protect sustainable development of China's economic development zones. This paper analyzes characteristics of the development roadmap for circular economy in eco-industrial parks and proposes methods and steps to construct development roadmap for circular economy based on knowledge engineering technology. It is helpful...
Based on the extension theory and characteristics of problem domain, this paper studies concept of matter-element theory, detailed analyses on reasoning decision-making process, establishes the matter-element models and the structure of knowledge base, proposes synthesized evaluation method and realization model for the circular economic decision-making support system.
This paper combines with the characteristic of knowledge-based engineering decision problem for circular economy, analyses knowledge representation, rule representation, reasoning mechanism and knowledge base structure of multi-objective attribute decision problems. It proposes a software architecture of knowledge-based engineering decision support system, which lays the foundation for the realization...
On the basis of researching SOA and SVG technologies, this proposed an approach and strategy to build the LBS service system based on the SVG service components, which is used to the actual system design. Enhanced system's flexibility and extendibility, realized managing data, sharing inquiry, dynamic revision, multi-platform operation in the LBS service system.
The article discusses the characteristics of mobile and embedded database as well as its synchronization realization on mobile terminal along with practical application. The article further provides several methods to improve the data accessing rate, efficiency, stability, maintainability and uniformity of the database, including multithread technology, three-layer duplication/buffer architecture,...
On the basis of explaining SCA and OSGi technology, this Paper introduces an application architecture and its implementation method that integrate SCA and OSGi technology, solving the dynamic problem of SCA Service Component, improving implementation of the SCA architecture to SOA, consequently enhancing the flexibility and the practicality of SCA architecture.
This article discussed many problems which exist in the process of realizing GIS datapsilas synchronization based on the characteristics of GIS spatio-temporal data and mobile database, such as how to improve the efficiency of data visiting and updating and guaranteeing data transmissionpsilas reliability and uniformity and so on, proposed the multithread technology, three-layer duplication/buffer...
Measurement of the pulse switch state current of RSD (reversely switching dynistor) device is crucial to transmit the energy efficiently with high stability and reliability. The novel CT (current transformer) centered on self-integrating Rogowski coil is proposed. The operation principle, methods for properly choosing electric parameters both of RSD-based pulse switch experimental loop and the self-integrating...
Traditional controllable saturation reactor (CSR) consists of single toroidal core, direct current (DC) controlled loop and AC (alternating current) excitation loop. A detection winding and secondary winding are added up to the CSR configuration and form a hybrid eletormagnetic comparator. The excitation current waveform is asymmetric when the CSR core is commonly stimulated both by AC and DC biasing...
A novel self-balancing comparator centered on the configuration of a controlled saturable reactor (CSR) is described. It utilizes AC voltage source excitation, the detection sensitivity of the magnetic amplifier is combined with detection winding and secondary winding. The terminal voltage from the detection winding is asymmetric waveform when the CSR is stimulated both by AC source and DC biasing...
The eddy current proximity sensor or probe is composed of exciting winding, detection winding and post processing circuit. Models of the key structural and electromagnetic parameters of the sensor are analyzed. The mutual influence characteristics induced by the structural and electromagnetic parameters are provided accordingly. The pull up resistor used to improve the reliability of the sensor will...
Wireless sensor networks (WSNs), being a relatively new technology, largely employ protocols designed for other ad hoc networks, especially mobile ad hoc networks (MANETs). However, on the basis of applications, there are many differences between WSNs and other types of ad hoc network and so WSNs would benefit from protocols which take into account their specific properties, especially in routing...
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