Applied Mechanics and Materials Vols. 644-650

Abstract: Most of the development of distributed detection is mainly based on a fixed number of samples under test specification. However, in reality, is more suitable for sequential tests is used, because it can take advantage of relatively small sample size and reach with a fixed sample size test the same detection performance. Heuristic-based approach, this paper proposes a new sort of samples distributed based detection scheme. Finally, can be illustrated by the simulation results that the proposed method compared to traditional SPRT can further reduce the number of samples needed for the final decision.

Abstract: Barcode detection has many applications and detection methods. Most applications have their own requirements for detection accuracy and speed. This paper has its requirement for speed in the real time system to detection inclination defect of barcode. It predominantly researches on two algorithms and their applications on 1-dimentional barcode scanning. One is location and the other is angle of inclination. The algorithms are particularly useful for real time detection of barcodes in online system with image vision devices.

Abstract: With the popularization of computer technology and application and popularization, the network technology has been widely used, the resulting network security issues are also increasingly prominent, to the network itself and the information system based on network constitutes the great potential safety hazard. This paper expounds the concept of intrusion detection and data mining, the commonly used invasion detection technology and models, and analyzes the application of data mining technology in intrusion detection system, to provide reference for the optimization and perfection of the network intrusion detection system and using for reference.

Abstract: For backward status of a missile guidance device monitoring methods, developed a set of ground monitoring system based on virtual instrument technology. The system meets the standard test of a certain type of missile guidance device, the data acquisition card and controller of PXI bus as the hardware platform, using LabVIEW as the software development platform, The acquisition of analog signal, video signal and serial communication set in one, it can detect the performance and parameters of the guidance device, and monitoring the flight trajectory of the missile qualitatively. The application results show that the monitoring system is stable and reliable, improve the efficiency and accuracy of monitoring, and has a certain popularization value.

Abstract: As people continue to pursue high-quality life, smart home industry will definitely become the sunrise industry in the future information appliances industries. This paper analyzed the development and application of smart home industry in China and designed a AM-based small home monitoring system with low-cost, high efficiency, scalability after the actual investigation and device selection.

Abstract: The leaking of water pipes will not only waste a large amount of water but also cause great economical damage. This paper is about the research on the leaking detector based on DSP. At first, the leaking detector can collect sound signals that flow two sides by pressure sensors fixed at the two sides of the water pipes, then it will enlarge and remove the noise of the collected sound signals. At last, with the assistance of relative information about signals, it can find out the exact leaking position. Having passed physical verification, this leaking detector can figure out the exact location of water pipe leaking.

Abstract: Neural network has obvious advantages on dealing with the uncertain problems with a huge amount of data. Some equipment’s faults performance of such characteristics that the date is abundant, and failure phenomenon is not explicit and uncertain. Then, it leads to being hard to diagnose the faults through the traditional diagnosis method in a short time. This paper will analysis the data feature and then build a model to deal with the qualitative data attributes in order that the BP network can use it smoothly. Calculation result shows that using this method, fault diagnosis can be simply and quickly. The paper also provides a new kind of composite way to figure out fault positions for the front-line operators based on experts’experience knowledge but not on measurement signals.

Abstract: In order to achieve decoding monitoring program in SGs interface, the paper analyzes the fundamental concept, network architecture and the advantages of CSFB in LTE network at first, then introduces the significance of SGs interface in CSFB. Using traversal method to decode the message of SGs interface and to achieve the monitoring of signaling messages in the playback platform, and lay a foundation for the further CDR synthesis at the same time. Finally, combined with the current network data, it’s verified the usability and operability of this scheme. It’s confirmed that the test result is correct, and the effect is good.

Abstract: To solve complex measurement and difficult remote operation in the test for frequency response characteristic of SAW device, an automatic test system for frequency response characteristic of SAW device based on vector network analyzer is proposed. The system consists of the vector network analyzer, the crossover cable, the computer, the fixtures and the SAW device. The user interface of test system is developed with the VB language. By means of calling the VISA-COM library, the SCPI commands can send to the vector network analyzer. Many functions of the automatic test system for frequency response characteristic of SAW device include the settings of measurement parameters, the measurement calibration, the data storage, the data display, the data transmission, the marker analysis and the data output. By the actual measurement of a SAW device with the center frequency at 101.764MHz, the experimental results show that the transmission loss of SAW device is-27.532dB, and the reflection loss is-7.715 dB.

Abstract: Considering in the progress of the power quality detection for disturbance signal, detected signals are often has the problem of random noise and impulse noise, in this paper, by using traditional wavelet de-noising, put forward a detection method of disturbance signal based on mathematical morphology and lifting wavelet, discussed its detection principle and implementation methods. Simulation results show that the method de-noising effect is obvious, can effectively improve the accuracy of the disturbance signal judgment.