Applied Mechanics and Materials Vol. 151

Abstract: Using the broad coverage of Global System for Mobile communications GSM (Global System for Mobile Communication) wireless network, monitoring remote target is one of research hot spots of remote control. The fact of applying the wireless communication technology, embedded processing techniques to remote monitoring system to realize the complete solution of the wireless remote monitoring system has strong industry value and research significance.This article offers a kind of monitoring system based on GSM. With wheeled mobile robots as an experimental platform, once robot detect water, fire, gas leakage or illegal invasion through the sensor, it will report to the householder through the short message in order to take emergency measures. Take GSM network as the communication channels , because it has a series of advantages such as fastness, reliability, low cost, less maintenance costs ,etc

Abstract: Virtual Instrument Technology represents the future direction of development of the instrument. At present, it is very popular that Virtual instrument is applied to test technology experiment in developed countries. The virtual integrated experimental platform of testing technology was designed based on the LabVIEW software, including signal generator, signal superimposed meter, digital filters, signal spectrum analyzer, noise signal detection and analysis system. The comprehensive experimental platform can replace the traditional equipment and can easily extend its functionality. It can provide students with a virtual integrated experimental platform.

Abstract: CANNY operator had widely usage for edge detection; however it also had certain deficiencies. So the traditional CANNY operator about this is improved and puts forward a kind of new algorithm used for image edge detection. Compared improved algorithm with traditional algorithm for edge detection, simulations shows that new algorithm is more effective for image edge detection and the clearer detection result is obtained.

Abstract: This paper used the PCA based method to build a face recognition system. At first, PAC provided a linear transformation matrix between the high and low dimensional spaces, then multi-dimensional Euclidean distance were used to rebuild residual to reduce the number of the obtained dimensions, speed up and high accuracy, which simplified the process of face recognition. Simulation results proved this algorithm is efficient.

Abstract: On the premise of data pre-processing by principal component analysis, in this paper, the largest Lyapunov exponent and generalized correlation dimension of multivariate time series are extracted based on the multivariate reconstruction presented. Though simulation analysis of coupling Rossler system, The results indicated that the method can identified and diagnosis fault accurately for complex system dynamics. The method has been used to fault character extraction for diesel engine with satisfactory results.

Abstract: Antimicrobial packaging is a hot research in food packaging research. A new type of antibacterial packaging film preparation was introduced in this paper. The new composite membrane was successfully prepared by using poly (succinic acid - adipic acid - butanediol) ester (PBSA) film as the base film through surface grafted approach, and nano-silver ions were used as antimicrobial agent in the antimicrobial film. The results showed that the new PBSA film has a good antibacterial antibacterial properties, and the best antibacterial agent formulations have been identified.

Abstract: The improvement of cryptogram query hit rate and the reduction of redundant data in query results are the challenges in the outsourced database (ODB) model. A synthetic encryption scheme applied to the ODB is presented to solve the problem of precise query over the cryptogram. This scheme employs encryption scheme on the attribute granularity, which combines a newly k-Mapping Character-data Encryption Scheme (k-MCES) with the existing Order Preserving Encryption Scheme (OPES). The theories and experiments analysis show that queries over encrypted data with this synthetic encryption scheme can return exact results. Furthermore, this scheme is correct and safe.

Abstract: Developed a new system model of software vulnerability discovering, which was based on fuzzing, feature matching of API sequences and data mining. Overcame the disadvantages of old techniques, this new method effectively improves the detection of potential unknown security vulnerabilities in software. Besides, this method is more automated and performs better in finding new security vulnerabilities.

Abstract: The sampling distribution of the coefficient of variation for a normal population is theoretically deduced, as well as its mean and variance. The conditions under which the mean and variance of the sampling distribution exist are studied, and the affecting factors on the sampling distribution shape are discussed.

Abstract: Traditional orthoimage mosaic methods do not perform well in computational speed and geometric precision. This paper proposed a fast orthoimage mosaic method for the application of grid. First of all, down-sample the original images and extracts feature, and adopt SANSAC to estimate the relative initial homography; second, refine homography matrix by Levenberg-Marquardt method and use the sparse bundle adjustment method to estimate the precise homography matrix; Third, passed the homography matrix to the original level of image by the homography relationship of the down-sampling and original image. Finally, synthesize the mosaic image. Our experiments showed that the method combined the down-sampling homography relationship of original image with sparse bundle adjustment organically, which effectively improved the speed and obtained geometric seamless mosaic.