Advanced Materials Research Vols. 838-841

Abstract: Solar energy is the main source of all energy on earth .The earth obtain the total energy annually is ten thousand times of the earth energy consumption at present, but the solar energy has a lower energy density on the earth's surface. If we want to use the solar energy, it is necessary to solve the intermittent and reliability problems of solar energy. The paper presents the principal of error analysis and deduces a formula of measurement error for heat coefficient in solar assisted heat pump system. We analyses the influence of water temperature, water flow and electrical energy consumption on measurement error of heat coefficient in the system. The result stresses that the key factor of reducing the measurement error is water temperature measurement of the system.

Abstract: With the popularization and application of Ground Source Heat Pump (GSHP) technology and the expanding scale of shallow geothermal exploitation, the environmental impact in the process of development and utilization is receiving more and more attention. According to the characteristics of ground source heat pump engineering, eBalance software is used to conduct research on life cycle environmental impact assessment. The result shows that more than 60% of resources consumption potential, acidification potential, and global warming potential derived from the process underground construction, and the eutrophication potential mainly derived from ground construction, underground construction, decommissioning with the contribution of 40.24%, 30.67% and 28.99%. According to the results, we put forward several reasonable control measures to ease the environmental impact in the process of geothermal exploitation and utilization for heat pump project.

Abstract: This paper investigates the levels of technical efficiency in the distribution segment of the natural gas industry in Italy. An empirical analysis is conducted on a sample of 32 gas distributors, while Data Envelopment Analysis (DEA) is performed to calculate efficiency scores. Technical and scale efficiency, and density measurements are also used. Results show that the sample average technical efficiency is about at 75.58%, with a standard deviation of 31.24%. Scale economies are also relevant in the industry as scale efficiency is only 49.28%, with the bulk of companies showing decreasing returns to scale. Furthermore, from graphical analysis apparently no association between technical, scale efficiency and density measurements emerges, indicating that there is no one optimal way to improve efficiency of gas distributing companies.

Abstract: This paper described a web GIS application of desertification status of Ruoergai area based on Google Maps. Desertification data were categorized as types, degrees, area of land desertification. Each category was classified/defined based on former research. The system was implemented based on detailed design by employing technologies such as Google Map API, data cache and struts2, etc. Application of the system proved to be applicable for demonstration of desertification status of Ruoergai area.

Abstract: The deformation monitoring of the landslide is an important research in the field of slope engineering. The terrestrial laser scanner is frequently applied to the deformation monitoring for landslide risk reduction in recent years. In this paper, the deformation was detected by means of comparison of sequential scanning datasets. And the erosion quantification can be extracted from the deformation. Finally, a preliminary change analysis methodology to distinguish landslide movement from erosion is presented. Our results enable us evaluate the stability of the landslide generally and basically. The application of terrestrial laser scanning to detect the movement and erosion quantification provides us another considerably effective and efficient way in the high-risk landslide deformation monitoring.

Abstract: Because of the restriction of many factors such as system complexity, the maintenance and support agencies of a communication control system can not be detected and debugged faulty equipment or systems, a maintenance environment simulation and integrated detection system has been designed in this paper, which expounded system design ideas in the general scheme.

Abstract: This paper presents an improved method to detect structural damages only by changes of eigenvectors. The underlying principle of the proposed technique is to measure the eigenvectors of the damaged system, and then use this set of data as well as the original test data of undamaged system to identify structural damages with the help of eigenvector perturbation method. In this contribution, a simple accelerated formula is developed to improve the accuracy of the eigenvector perturbation method. With the introduction of the accelerated formula, the proposed method is able to achieve more accurate results than that obtained by the original eigenvector perturbation method without any high-order analysis or multi-iterations. The effectiveness of the proposed method is illustrated using simulated data on a numerical example. From the numerical results, it can be concluded that the proposed approach is simple to implement and can identify structural damages very accurately only by the first order sensitivity analysis of the eigenvector.

Abstract: Contribution deals with laboratory measurements of deformations in the place exposed to local load caused by additional pre-stressing. The measurements are made at the masonry corner built in the laboratory equipment. The laboratory equipment was designed at Faculty of Civil Engineering VSB - TU Ostrava for measurement tri-axial stress-strain conditions in masonry. In this masonry corner two pre-stressing bars are placed. These bars are in different height and are anchored to the anchor plates, which transfer pre-stressing forces to the masonry. The masonry was pre-stressed in the both directions. The specimen for laboratory testing is performed in the proportion to the reality of 1:1.

Abstract: This article describes the application of GPS in highway measurement, points out the error of GPS in highway measurement, expounds how to reduce the error to improve measurement accuracy and widen the application fields of GPS.

Abstract: The structure needs to be lifted-off from the ground during the weighing progress. For that the weighing fulcrum and the building fulcrum are different and the building fulcrum is fewer usually and the weighing system has some asynchronism during the lifting process of the structure, it is very important to measure the stress of the key points of the structure during the weighing progress. The paper uses finite element analysis to get the stress sensitive of the weighing device while weighing and uses the optical fiber sensor technology to measure the dynamic stress. Through the experiment with the weighing test bench show that the optical fiber sensor technology has a clear advantage to the traditional resistance strain gauge technique.