Applied Mechanics and Materials Vols. 256-259

Abstract: Industrial ultrasonic imaging system based on compressed sensing(IUICS),is still lack of available implementation, due to its difficulty in hardware realization.However,thanks to the recent finite rate of innovation and ultrasonic phased array technology,it is possible to apply Compressive Sensing framework to industrial ultrasonic imaging system.In this paper,we propose an available scheme of industrial ultrasonic imaging,which includes the sampling of signal,reconstruction algorithm and its physical structure, based on Compressed Sensing.

Abstract: With remote sensing mapping for land cover of China at scale of 1 to 250,000 as an example, we analyzed main quality problems related to cartographic specifications. In order to improve efficiency of checking the problems and to make checking and evaluating results more objective, we designed and developed a set of quality check and evaluation system based on cartographic specification in loose coupling mode with open source software tools. The actual evaluation results from the system demonstrated that the land cover data generally met requirements of cartographic specifications.

Abstract: Georobot is widely used to precision engineering measurement, especially in automatic continuous deformation monitoring, e.g. dam and landslide deformation monitoring, in virtue of the unique ATR and tracking technology. However it is hard to evaluate the actual tracking measurement precision because of the complex circumstance in specific application. The paper designs reasonable experiments solution, including test of tracking measurement of the stationary target point for the positioning precision and test of tracking measurement of the regular shape for the measuring deformation precision. The experiment result shows the positioning precision and measuring deformation precision both can reach the sub-millimeter level if centering error is eliminated, otherwise maybe in about 1.5mm level. It validates the reliability and efficiency of Georobot in automatic continuous deformation monitoring.

Abstract: In order to improve the accuracy and reliability of prediction of deformation monitoring data, a hybrid modeling and forecasting approach based on autoregressive model( AR) and the back-propagation( BP) neural network is proposed to forecast the deformation. The results of experiments show that this method can forecast the deformation precisely, and it is more suitable for those occasions where the deformation monitoring data should meet the high demand.

Abstract: This paper presents parameters estimation techniques for coupled industrial tanks using the mixed Unscented Kalman Filter (UKF) and Differential Evolution (DE) method. UKF have known to be a typical estimation technique used to estimate the state vectors and parameters of nonlinear dynamical systems and DE is one of the most powerful stochastic real-parameter optimization algorithms. Meanwhile, liquid tank systems play important role in industrial application such as in food processing, beverage, dairy, filtration, effluent treatment, pharmaceutical industry, water purification system, industrial chemical processing and spray coating. The aim is to model the coupled tank system using mixed UKF and DE method to estimate the parameters of the tank. First, a non-linear mathematical model is developed. Next, its parameters are identified using mixed Unscented Kalman Filter (UKF) and Differential Evolution (DE) based on the experimental data. DE algorithm is integrated into the UKF algorithm to optimize the Kalman gain obtained. The obtained results demonstrate good performances.

Abstract: This paper analyzes technical features of digital urban management system, and constructs its general structure. This system adopts ten thousand meters unit gird management, and the combination of urban events with urban facilities components, so as to reconstruct the urban management process. At last this design has proved its availability by a practical example.

Abstract: The accurate analysis of the length of the interfacial transition zone (ITZ) between aggregates and the hardened bulk cement paste is of great importance to the definition of the effective diffusion field in concrete. A new method for measuring the length of ITZ on concrete section by digital image processing technique is proposed in this paper. Compared with the traditional method, the ITZ on concrete section can be discriminated and the length of ITZ can be measured by the method presented rapidly and accurately, and the method can be used in various section forms of concrete specimens.

Abstract: The low strain method has the advantages of simple, fast detection is widely used in the pile testing. The low strain method was presented to pile test on the complex building engineering of China Mobile Group Gansu Co.,Ltd. The basic theory, tesing method of pile and judgment standard about the ultrasonic wave method are analyzed.

Abstract: Engineering design quality is very important for construction projects. Although many quality or performance management methods have been proposed, a simple quantitative indicator is lacking. This research proposes the First Time Correctness Ratio (FTCR) indicator to quantify the percentage of work correctly done the first time. A checklist consisting of major design activities was developed first by reference to design management theory, quality control process of a case consulting firm, and interviews with designers and owners. Then the ways of using the checklist to evaluate design quality and calculating the FTCR scores were discussed for different levels and time phases of a project. Finally four engineering design case projects were used to test the checklist applicability and derive FTCR scores. The results show that the FTCR method is a simple indicator to distinguish performances. In addition, the FTCR approach provides benefits for engineering design organizations to meet the ISO requirements.

Abstract: A wide-tuning range voltage-controlled oscillator (VCO) with adjustable ground-plate inductor for ultra-wide band (UWB) application is presented in this paper. The VCO was implemented by standard 90nm CMOS process at 1.2V supply voltage and power consumption of 6mW. The tuning range from 13.3 GHz to 15.6 GHz with phase noise between -99.98 and -115dBc/Hz@1MHz is obtained. The output power is around -8.7 to -9.6dBm and chip area of 0.77x0.62mm2.