Applied Mechanics and Materials Vols. 263-266

Abstract: In order to improve the predictive accuracy of SVM on financial time series, we propose a WD-GA-SVR model in this paper. First, do wavelet denoising (WD) to financial time series to eliminate the interference noise in the original sequence; and use the genetical gorithm (GA) for parameter optimization to make up selecte defects of the parameters c and g; use the obtained optimal parameter values to train to formate the optimal SVM learning machine. The forecast of the order time delay data of CSI 300 index and the comparative analysis of the SVR model, GA-SVR and the WD-GA-SVR model predictions indicate that the WD-GA-SVR model significantly improve the robustness of the prediction model and forecast accuracy, can provide a reference for policy makers and investors.

Abstract: The system development was based on embedded Linux operating system, the SamSung S3C6410 processor analyzed data. The terminal recognized the basic information of patients through the RFID radio frequency technology, and obtained patient body temperature, electrocardiogram, pulse data via peripheral measurement module, The data would be sent to the servers placed in the background observation center of the hospital in real time through the 3G network, thereby hospital could establish patient's health file material. This paper mainly discusses the terminal hardware architectures and the design and implementation of human-machine interactive interface. The software design of terminal use Qt Designer, we build and transplant the embedded database—SQLite in the terminal. The mobile handheld terminal is practical, good real-time performance, easy to operate, can be used in community medical cause, can help for the community doctor follow-up, health filing, etc. and it has practical application value of popularization.

Abstract: Recently virtualization has been one of the most popular research topics in system software area. While there are many commercial virtualization products for general-purpose computer system, little efforts are made to virtualize embedded system. In this paper, we design and implement a virtual machine monitor which divides each physical hardware resource of an embedded system into logical ones and reorganizes them into many virtual machines so that several real-time operating systems run concurrently on a single embedded system. We measure various performance metrics of the virtual machine monitor developed on a real embedded system. The results of the measurement study show that our virtual machine monitor has enough potentiality of its application to real-world embedded systems.

Abstract: This paper proposes a new slicing approach that uses multiple sets of cutting planes to automatic determine parting lines and boundaries of undercuts of complex CAD parts for the multi-piece molds design. In this algorithm, the group of feasible parting directions is first collected and three sets of cutting planes are then formed based on the primary parting direction. One set of cutting planes is used to generate slicing profiles, and two others are used to extract intersection points passed through by parting loops and boundaries of undercuts. The result shows that the proposed parting lines are suitable to obtain parting surfaces and construct the entire mold-pieces. The algorithm provides a highly effective solution for handling many complex industrial parts.

Abstract: As the MCU course is combination with theory and practice, and pays attention to cultivate students' practical ability. This paper has introduced the present situation and characteristic of the course. Going with the novel CDIO teaching mode, the practical solution of CDIO mode in the MCU course teaching was designed and applied. By practicing the teaching mean, students can complete the course study in the process of learning during doing and doing during learning. In additional, students can reach the course training purpose and can improve higher innovation and independent thinking abilities.

Abstract: This paper extends Object-Z with Real-Time and describes the characters of real-time system: delay, timeout and multithread. Real-Time Object-Z consists two parts: functional specification and filter specification. The both for any time critical system can be developed with two parts. Functional specification developed with Object-Z formerly can be reused. The main benefit is that it is convenient to deal with the timing variables defined in the specification developed with our approach. Using our approach, we can develop real-time specification and reason about the real-time properties conveniently.

Abstract: For urban sewage treatment process of A²/O, a fault diagnosis method based on parameter estimation of Activated Sludge Model No.2(ASM2) model and expert system is proposed. Firstly, the A²/O process is simulated based on Activated Sludge Model No.2(ASM2) model, according to which, the estimated value of component parameters of biochemical reaction process is obtained, and when it’s compared with the normal value of corresponding parameters, the faults can be detected. Furthermore, an expert system that can draw fault diagnosis results is designed by means of uncertainty reasoning for expert knowledge. Finally, a fault diagnosis system for A²/O process is developed. For a sewage treatment plant of Kunming, experiment result has shown that the fault diagnosis system for A²/O process can make effective diagnosis of the actual process issues, and it has certain engineering practicability.

Abstract: This paper introduced an intelligent match method of emergency plan based on keywords extraction. Words frequency, part of speech and position of framework are taken as the keyword weight factors. Least-squares error linear estimate method is used to regulate the factors and calculate keywords weight. And Vector Space Model is set up to calculate the maximum similarity between plan texts to complete design of plan match. The expansible practical parameters adjustment module is provided to adapt to diversity of match plan with emphasis part. Compare with tf*idf, the experimental results show that the presented method is more promising in intelligent match method of emergency plan.

Abstract: The workflow of electric power dispatching features many characteristics, such as multi-level dispatching, multiple applications, safe, and reliable. This paper analyzes the characteristics of electric power dispatching process, and proposes the descriptive standard of electric power dispatching process, as well as the workflow operation mechanism on the basis of documents, which can achieve distributed processing of the flow. Meanwhile, based on smart electric power dispatching technological support system, it can apply integration through service bus and other services. The practice has proved that this mechanism can meet the need of wide circulation for electric power dispatching flow, and it possesses favorable application value.

Abstract: As the development of wireless network and 3rd generation communication, LBS will have broad application prospects. At the same time, CGML spatial data is evolving as the transmission and exchange standard of mobile spatial data because of its compression and rich information. Therefore, a mobile cache strategy of CGML spatial data is proposed. In the strategy, firstly, the basic and expand query boxes are generated in the center of terminal’s location. And then, the cartographic data received in the basic box is formed into CGML file. Finally, the received data in the expand box is added to the built CGML file, which is used to follow-up operation of cartography.