Advanced Materials Research Vols. 268-270

Abstract: Based on the node low energy consumption wireless sensor network for greenhouse, which takes mobile gathering node as center to self-organize subnets, this article mainly studies the relationship among network parameters and strike a balance between energy saving and system stability to establish the model of network parameter. Examples are illustrated to show how to determine network parameters and why the model is effective.

Abstract: This paper defined a kind of communication protocol between the RIP card and the printhead circuit for the inkjet printing system. Protocol project was chosen in the protocol design, for which Petri net was used. After defining the message, the protocol model was established based on colored Petri net with inhibitor arcs. The model has priority and allow different message to transmit on the same data bus subsequently. Though analyzing and simulating in CPN Tools, the model was proved to be able to realize the function.

Abstract: In mathematics field, information and computing science specialty has developed most rapidly. But many universities confront a lot of problems at curriculum design of this subject area since they don’t have adequate experiences in education in information and computing science. Therefore, it leads to close-down of this specialty and waste many resources in some universities. This paper will present a few new ideas of the innovation in curriculum orientation and design in information and computing science in universities.

Abstract: This article classified the CAN bus in accordance with the bus number, and detailedly studied the development status and problems both in single bus redundant system and dual-bus redundant system, moreover analyzed three main issues exist in redundant technique applications with high reliability which are the rapidity and accuracy of network fault detection, and how to improve network efficiency in data transmission and reduce the probability of task conflict, as well as flexible and efficient in design of communication protocol. Finally, the foreground applications of CAN bus in high-reliability field like Aero-Space is summarized.

Abstract: Aircraft recognition automatically is an important research content in target recognition. Improving aircraft recognition precision can accurately realize the regional dynamics, and make correct decision-making support. This paper researches on recognition of aircraft in high spatial resolution remote sensing imagery based on edge detection technology, extraction skeleton technology based on Constrained Delaunay Triangulation, and target recognition technology based on Geometric Features Parameter and Network Measurement.

Abstract: A firm performance is deconstructed into operational, growth and financial performance based on IT capability, then the model of influencing mechanism of IT capability on firm performance is put forward from the perspective of business process transform mode. A questionnaire methodology is used for an empirical test. Our results indicate that IT capability has the great effects on operational and growth performance, and operational performance has the great effects on growth and financial performance, however, growth performance has no significant effects on financial performance. And efficient improvement of business process doesn’t have the great effects on operational performance, while quality of business process change is a mediator to explain the relationship between IT capability and operational performance.

Abstract: This paper focuses on the impact of export on China's labor standards through empirical analysis. After building a stable vector auto-regression model, it uses the changing rate of the value of export as the index of export, and the growth rate of worker’s real wages as the index of labor standards. The result of estimation indicates that export has significant positive impact on China’s labor standards. The estimation of vector error correct model, the result of impulse responses and variance decompositions and the Granger causality test confirms that. The result of empirical analysis finds no evidence of the race-to-the-bottom of labor standards in China.

Abstract: The computer application in hospital information management is more and more universal and thorough now.But the computer develops anyway, it’s nature all is human being's implement.We should treat the current situation and future prospect that the computer applied in hospital information management with system and develop view.

Abstract: Data constraints are the basis of the database normalization, the introduction of XML documents with incomplete information, data constraints need to be re-defined. The precise definition of the tree inferior strong multi-valued dependency for XML documents(XTISMVD) was proposed, which was based on the tree structure and subtree information equivalent. Judging condition of XTISMVD was studied. By instance this paper shows that the existence of XTISMVD produces redundancies and update anomalies, moving or adding nodes for XML Schema can reduce redundancies.

Abstract: For solving logical implication problem in the presence of XML strong multi-valued dependency(denoted as XSMVD) and XML weak multi-valued dependency(denoted as XWMVD) under incomplete information circumstances, the inference rules of XSMVD and XWMVD based on XML Schema were discussed. The concepts of XML Schema and incomplete XML document tree according with XML Schema were formalized. Based on the concepts of sub-tree information equivalence and sub-tree information consistent, the definitions of XSMVD and XWMVD were given and their nature was studied. When XSMVD and XWMVD exist at the same time in XML Schema, their inference rules were presented and their soundness was proved. The production in this work lays the foundation for normalization of XML Schema existing XSMVD and XWMVD at the same time under incomplete information circumstances.