Applied Mechanics and Materials Vols. 675-677

Abstract: As an emerging tourist city, Yichang is where the Gezhouba hydropower station and the Three Gorges hydropower station locate. It is honored as "Pearl of the Three Gorges", "Power Heart of China", and "City of Water and Electricity". Though Yichang’s city construction enjoys rapid development, the development of its urban color does not keep up with the speed. This paper analyzes the influencing factors of Yichang’s urban color, like natural geography, humanity, history and regional feature. Moreover, scheme and advices are put forward to provide theoretical and technical support for Yichang’s urban color planning.

Abstract: Jingdezhen is an outstanding historical and cultural city as well as world famous Porcelain Metropolis which has rich tourism and cultural resources. In recent years, Jingdezhen has made some achievements in tourism industry, but it still has some problems in its overall development with slow speed. So it is becoming an urgent problem for how to explore the tourism resources and develop the tourism industry in Jingdezhen. Through analyzing the present situation and existing problems in tourism development in Jingdezhen, this article puts forward some effective measures to deal with the problems, thus, to promote the sustainable development and innovation of tourism resources of historical and cultural city in Jingdezhen.

Abstract: As an essential part in urban planning and design, urban color draws more and more attention in recent years. Urban color mainly includs natural environmental color and artificial color. Environmental color is mainly about the color of land and vegetation. While, artificial color means the color of buildings, advertisements, transportation and other artificial objects. This paper analyzes some influncing factors of urban color with Changsha taken as an example.

Abstract: In order to realize the status of cultivated land resources in Changsha and to protect cultivated land resources. According to output benefit coefficient, consumption and return coefficient, population and substitution coefficient and intensive cultivation coefficient, cultivated land utilization benefits were quantitatively analyzed in Changsha from 2002 to 2011. The results showed that: the trend of the quantity of cultivated land was upward in general in Changsha. But the quality of cultivated land decreased. At the same time, the output benefit of arable land was good in 2004, 2006 and 2008, but the rest of year was lower, and the tendency was dropping. On this basis, the effectiveness of the strategies was improved to use of arable land resources.

Abstract: With the method of exploratory factor analysis and structural equation modeling, this paper presented a model of urban forest recreationists’ satisfaction and conducted an empirical research. The main conclusions are as follows. Perceived value has an important and positive impact on the formation of satisfaction experience. Perceptions of "landscape resources", "facilities and services", "functional utility", "social utility" and "emotional utility" are the main factors arising the perceived value of recreationists. Meanwhile, Perceptions of "emotional utility" and "landscape resources" are the key factors influencing recreationists’ satisfaction. Furthermore, Perceptions of "functional utility" and "social utility" positively affect the perceived value of recreationists, and the perception of "facilities and services" is likely a guarantee factor for satisfaction experience. In addition, this paper has confirmed the applicability of the Means-end theory and the Cognitive-affective theory in the practice of urban forest recreationists’ satisfaction study.

Abstract: Based on the unique geographical environment, local manners, architectural styles, historical and cultural traditions, aesthetic taste and landscape, the writer involves landscape ecological studies into the utterance of natural elements and landscape characteristics in design of park landscape, which may achieves the self-development of environment by maintaining diversity of ecology to a certain extent. The landscape planning focus on diversity of landscape based on sustainable development, and forms up the evaluation standards and design principals on park landscape design.

Abstract: The dynamic and electric field excitation method is a new advanced detection method. In this method, the observation frequency and of emission electrode must be reasonably selected according to the actual geological conditions of coal mine roadway to obtain the apparent frequency with adequate Induced Polarization (IP) information of geological anomalies and improve the measurement accuracy of the instrument. This paper completed the simulation of apparent frequency varying with the observation frequency and Cole-Cole model parameters with MATLAB software. The results show that the key to selecting the observation frequency mainly depends on the charge and discharge time constant .Then the paper analyzed the effect of the measured apparent frequency on the measurement accuracy. According to time constant values​​ of geological conditions in coal mine roadway, considering the efficiency and electromagnetic coupling effects on the measurement, it is best to select the observation frequency within a frequency range of 0.05~0.1Hz and the frequency ratio coefficient of 13 or 15. Now apparent IP effect is obtained.

Abstract: The Maoniuping REE deposit located in the northern section of the Panxi (Panzhihua and Xichang) rift zone of western margin of the Yangtze plate. It is by far the world's youngest discovered endogenous LREE deposit, and is also the world's third largest endogenous LREE deposit. Yanshanian alkaline granites are widely developed in Mianxi region, and the Maoniuping REE deposit hosts in the middle of Mianqi granite body. Surrounding rocks of REE ore body are nordmarkite and carbonatite. According to the output position, mineralization types, structure and other features, ore types of the Maoniuping REE deposit are designated as carbonatite type, pegmatite type, breccia type, and fine stockwork type. According to phase characteristics at room temperature and change of heating process, inclusions can be divided into three kinds: melt inclusions (M), melt fluid inclusions (ML) and fluid inclusions (L).

Abstract: In this paper, the Renbei Ordovician reservoir of Renqiu buried hill of Raoyang Depression was taken as an example, the numerical model of geothermal field was constructed. Then, the stress numerical simulation was carried out considering the impact of the geothermal field. The results showed that the result of numerical simulation of crustal stress is consistent with the actual measurements, the maximum horizontal principal crustal stress focuses between-49MPa and-96MPa in this area. The minimum horizontal principal crustal stress focuses between-65MPa and-115 MPa. The total stress focuses between 59Mpa and 95MPa, showing an obvious gradient distribution and a decreasing trend from the northwest to the southeast. The fault zone and the fault transition zone have an obvious partition function to the contour lines of the stress intensity.

Abstract: An online coal measurement system, which is based on the prompt gamma neutron activation analysis (PGNAA) technology and uses a D-T neutron generator, is studied in this work. To improve the analytical precision of the element in coal, the original moderator is optimized. The standards of the optimization are (1) the neutron flux increase 50% after moderation; (2) the proportion of thermal and middle-energy neutron and fast neutron is nearly equal to 1:1. Using Monte Carlo method, the moderator has been optimized by adding the uranium238 to the original moderator, which consists of high density polyethylene (HDPE). The simulation results show that the optimization standards can be basically satisfied when the thickness of the uranium238 and HDPE are 4cm and 1cm respectively. On this basis, preliminary study on introducing the channel to moderator is carried out. The preliminary results show that the channel can improve the total neutron flux. But also, it will decrease the proportion of thermal and middle-energy neutron and fast neutron.