Advanced Materials Research Vols. 433-440

Abstract: In this paper, the hazards of stray current corrosion in urban rail transit system are analyzed, a method for monitoring the stray current is presented. The design of the monitoring system is described. This system can realize the functions such as data collection, data real-time display, data storage, historical data inquiry, give an alarm and output control signals to the cabinet of draining current.

Abstract: In Nanning basin, because of the peculiar relief and stratum model, the bearing support soil layers for pile foundation of high-rise buildings generally is gravel layer or mudstone layers or sandstone layers. On first or second terrace in basin, gravel layer is most chose as the bearing stratum for pile foundation of high-rise buildings. Static driven piles are commonly used in Nanning, because they have advantages of fast construction, high bearing capacity and noiseless despite costly. In this paper, the actual test data of a 32-stories apartment building of a college in Nanning has been consider- ed in detail. According to the present situation of project operations, the test results show that the piles which length is less than 6m can fully meet the design requirements. This project is a successful example.

Abstract: Air conditioning is widely used nowadays. It brings comfortable life to us while gives some problems. Regional shortage of power supply has a great deal to do with the extensive use of air conditioner for long time. Against the background of low carbon economy, this paper choose 3 room types of 4 typical cities which have different habitable area and carry out a financial analysis of 4 types of air conditioning system(northern city has 5 types). So we’ll have a comprehensive and intuitive understand of economy of typical air conditioning system. It could help the selection of air conditioning system of different area and make good use of energy.

Abstract: In the southwest region of Shandong province, villagers spontaneously adopt various ways to resist the cold climate in winter. In this paper, first we selected three typical rural residences in the region as case buildings. The three residences respectively use different heating ways for better indoor thermal environment, honeycomb briquette, Kang and furnable-heating. Then, we measured and compared the heat and moisture parameters of indoor and outdoor environment of the three residences. Finally, with the results of measurement and comparison, we proposed some methods to improve indoor thermal environment of rural residences, and economical ways of heating to enhance quality of villagers life, and provide technical support for new rural construction.

Abstract: This paper has introduced rational arch axis and built finite element models for the analysis of arch axis type selection, based on the retractable roof of Ordos Dong-sheng stadium under actual loads. And the approximation optimum method is used in adjustment of rational arch axis of the stadium's giant arch. At last, this paper supplies some references for this project design.

Abstract: In building design, architects actively utilize all kinds of methods, such as ventilation and sunshade, to adapt to the hot-humid climate ,which is the main way to create a “green building ”.This paper describes the “climate adaptability ”design tactics in the case of the University Library in the Lingnan region——in a hot-humid climate. Furthermore, this paper gives suggestions by describing the advantages and disadvantages of the typical design practice in order to benefit regional architectural study.

Abstract: Based on system modeling, including ore reserves model, mineral processing model and comprehensive technical economic analysis model, the major economic indexes of Cangshang Gold Mine were multi-objective optimized by fuzzy comprehensive evaluation. After optimization, the total profits, gold output and NPV were improved.

Abstract: Noise sources identification based on microphone array theory was firstly introduced, A method was derived, which can be used to analyze effect of noise emission from railway viaduct to noise reduction of noise barriers. Vibration and noise emission of railway viaduct and noise barrier were studied using field testing with microphone array technology and vibration testing. The results concluded that noise emission from the viaduct has remarkable effects on noise reduction of noise barriers compared with the effects of noise emission from the noise barriers themselves, which is neglectable.

Abstract: The aim of this work is to remove residual turbidity and index of Potassium permanganate of the drinking water by PAC/Chitosan coagulation treatment. The experiments were performd the efficiency of coagulation by PAC/Chitosan at different chitosan dosages , molecular weight and pH value. Zeta potential instrument and Nikon electron microscope were used to test Zeta potential and observe flocs morphology. It turn out that Chitosan enhance the flocculation treatment of the surface water of raw water of Yellow River by polymeric aluminum chloride (PAC)when PAC dosage is 35 mg•l-1 and Chitosan is 0.15 mg•l-1 and infer coagulation aid mechanism was interpartical bridging rather than the electrical neutralization. Microscope and image analysis system of flocs morphology show that fractal dimension of morphology of PAC and PAC/Chitosan were 1.294,1.385, respectively.

Abstract: An assessment approach in regard to tailings dam break would be analyzed and established in aspects of life, property and environment & resources loss in the essay. Tailings bam break hits local social economy varying with region as a result of particular and specialized space diversity. With the simple and practicable approach, it is quite reasonable to accomplish quantitative assessment of risk as well as review controlling priority to potential risk arising from tailings reservoir.