Applied Mechanics and Materials Vols. 236-237

Abstract: Theories and methods of tactics generation are not developed as well as other aspects in Architectural Programming. Rules and methods of solving problems and innovating in the process of generating tactics are deficient. This research which proposes the theory and methods facing to intelligent tactics generation in Architectural Programming is an applying basic study on the intersection of Extenics, Architectural Programming, and Artificial Intelligence. It promotes the combination and application of Architecture, Extenics, and Artificial Intelligence. Moreover it promotes the creative thinking in Architecture to develop to the intelligent direction. At last it promotes a big progress on Computer Aided Architectural Programming.

Abstract: Walking, as the most fundamental trip mode of humanity, is also a trip mode with no energy consumption, no emission and good for health. With the deterioration of the environment of pedestrian transportation in China, the citizens are looking forward to building a safe, harmonious, high-quality pedestrian environment. By analyzing the successful experience in planning, design, construction, management and other aspects of pedestrian system in Singapore, the paper has summarized the beneficial enlightenment on propaganda, education, land use, planning, design, laws and regulations, which will provide reference to green transportation and living trips of citizens for the cities in developing countries.

Abstract: This paper introduces two technical innovations in the signal demonstration project of Beijing Subway Yizhuang Line: the “free wave antenna + waveguide” combined transmission and the "minimum system" simulation. It also summaries the demonstration project management concepts and innovative practice experiences. Analyzing the technology and management innovation, we expect to provide a reference for the progress of the autonomy of the other rail transport high-end and core technology.

Abstract: Urban rail transit is technology-intensive, comprehensive and complex system engineering. With the acceleration of the process of localization, the method which is now widely taken accredited identification and unit equipment, laboratory tests after the direct on-line applications has been gradually can not meet the overall requirements of reliability assurance. In this paper, we propose urban rail transit testing simulation platform based on the minimum system. It provides reliable technical support for urban rail transit system design and development, inspection and testing, operational analysis.

Abstract: The primary objective of this study was to develop a multivariate Poisson-lognormal regression model (MVPLN) to evaluate the effects of contributing factors to crash frequency and to identify the correlations among different types. Crash data were collected at 282 exit-ramps on freeways in Florida, US.The Markov chain Monte Carlo (MCMC) method was used to get the solutions of the MVPLN model.The effects of crash-related factors of different types were explored in the MVPLN model considering the correlation structure.It was found thatmainline lane number was the contributing factor for both single-lane and two-lane exit ramp.

Abstract: This study developed the improvements to supplement problems of the existing beam-form support, which was evaluated by experts. By evaluating Improvement 3 and the existing support in the aspect of performance and construction cost, its applicability was reviewed in the field of construction work. Comparing the developed beam-form support with the existing support, thus, its constructability, safety and durability were more excellent while the construction cost was similar to each other, which means that it is possible to be applied to the field. However, it is considered that we need to have more additional researches on construction procedures that can be applied to building beam-form and development of members with economic feasibility.

Abstract: This study is intended to investigate the performance depending on the screw type at the end part of reinforcement in the mechanical connection of high strength reinforcement with screws. Three types of mechanical connection were designed and tensile test was performed for those. The results presented that, although the end part of reinforcement was processed with screws, the reinforcement’s yield and tensile strength sufficiently appeared. But, its plastic deformation capacity after yielding fell 17~26% more than reinforcement.

Abstract: In view of the country needs to improve earthquake disaster prevention ability of the city, this essay provided the design plan of Langfang Earthquake Disaster Prediction System(EDPS) Based on GIS. Using the GIS technology, data conversion technology and software development technology, the system established the earthquake damage prediction of spatial database and unified file data conversion interface and coordinate system, the system achieved the Langfang map visualization management and earthquake damage prediction of thematic map management system. The realization of the system provides effective technical support and improves the Langfang earthquake disaster prevention capacity.

Abstract: The smelting factory of Dexing Copper Mine is separated, so mine stripping material and low grade ore yards have huge impact on the environment. For a variety of reasons, the efficiency of operation of the environmental protection facilities in Dexing Copper Mine area was so low that all the acid wastewater was not treated well before discharge. This can lead to a problem that extracting copper and other metal mineral from the low grade ore in the waste stone, and also produce acidic wastewater and heavy metal pollution. Finally, the wastewater discharge into the Dawu River has made huge impact on water, soil, ecological environment. Based on the mathematical model of DGH, this paper analyzed the soil samples of Dexing Copper Mine in the Dawu River domain by the method of successive extraction. The results reveals the DGH characteristics of Cd element in the soil of downstream Dawu River. Cd element in the soil of downstream of Dawu Rive tends to shift from TRCP-Cd (total releasable content of Cd element) to TCAS-Cd (total concentration of active species of Cd element). The critical point of outbreak is TRCP=185.90 ng/g. 36% of the samples of downstream Dawu River oversteps the critical point of outbreak, making it possible to break out. Meanwhile, the analysis of DGH of Cd element is of great significance to early-warning of soil heavy metal pollution and improvement of ecological environment in the study area.

Abstract: The test had been carried out on a lead oxide ore (18.57% Pb) from Kazakhstan, which had a high oxidation ratio (above 95%) and complexly intergrowed with plenty of alkaline gangue minerals such as calcite and dolomite. A joint flowsheet that combined the gravity separation with flotation was developed to recover the lead, during which flowsheet, a new effective slurry regulator was used. Compared with the joint flowsheet, the concentrates of the single gravity separation and the single flotation were achieved with a lower Pb recovery of 53.80% and 56.06%, and the Pb grade of 62.00% and 66.28%, respectively. Finally, a concentrate by the joint flowsheet was obtained with a Pb recovery of 89.12% and a Pb grade of 58.90%. The tailing from the joint flowsheet had a low Pb grade of 1.59%, with a loss of 5.50% of Pb. The experimental results show that the joint flowsheet was better than the single flowsheet for this lead oxide ore, which greatly improves both the performance and economic benefit for the concentrator.