Applied Mechanics and Materials Vols. 484-485

Abstract: Based on the integrated study of the outcrops, the seismic, drilling and logging data of Lianglitage formation in central Tarim Basin, the sequence stratigraphic framework of the platform margin is built, and the Lianglitage formation is divided into 3 third-order sequences. The vertical pattern and lateral distribution for carbonate reef-bank reservoir in sequence stratigraphic framework are analyzed. The reef-bank reservoir mainly developed in highstand system tract of sequence Ssq2, and distributed along the carbonate platform margin of the Middle-Late Ordovician in central Tarim Basin. The mudstone mound, organic reef, granule bank are vertically stacked. Laterally, the area of well shun3-shun4-shun2-shun6 are characterized by multiphase bank reservoir overlapping, and the area of well TZ82-TZ44 - TZ161-TZ24 - TZ26 are characterized by multiphase organic reef and bank overlapping. The reef-bank complexes in sequence Ssq2 are the main targets of exploration in central Tarim Basin.

Abstract: In order to improve the accuracy of prospecting and efficiency of coal extraction, it is necessary to understand the geological construction deeply. Therefore, the reconstruction of fault surface models is highly important. Reconstructe surface from an unorganized cloud of points by using the RBF neural networkcs advantages of approximating no-linear function, and the algorithmcs scheme and analyses were given and the proposed method was applied to the coal surface reconstruction, this neural network can not only approximate the surface with high precision but also has good smoothness.

Abstract: 89 Au geochemical anomalies are delineated by using 1/200000 regional geochemical exploration data. By researching regional geochemical characteristics and the relationship with the geological background, the author points out that: the main factors causing high background of Au geochemical anomalies are Gaixian and Dashiqiao formation of Liaohe group, intrusions of Mesozoic intermediate-acid intrusive rocks. The elements combination types of typical anomalies are determined by using factorial analysis,cluster analysis and other mathematical methods with the combination of elements association in typical anomalies:the composite anomaly of Baiyun gold deposits is Au-As-Sb, Maoling gold deposit is Au-As-Bi-Mo, Wulong gold deposits is Au-As-Bi-W, Xiaotongjiapuzi gold deposit is Au-As-Bi-Mo-Sb. By using multivariate statistical analysis method,62 ore-caused anomaly are preferred in 89 Au geochemical anomalies delineated. On this basis, the 62 anomalies are divided into 4 kinds of anomaly types reference to elements combination types of typical anomalies,the classification results of ore-caused anomalies are: 4 geochemical anomalies of Baiyun type,36 geochemical anomalies of Maoling type,11 geochemical anomalies of Wulong type, 11 geochemical anomalies of Xiaotongjapuzi type. According to the results, the prospecting direction is provided for the future of gold exploration.

Abstract: The M block in Liaohe Oilfield uses steam huff and puff coupled with water flooding, and it has entered the middle-later period of oilfield development. To keep stable yield, the development mode should be changed. Based on the geological characteristics in the M block, this paper puts forward two different ways: Horizontal well injects steam to steam drive; Horizontal well as product well when vertical well injects steam. Combined with practical data and using numerical simulation to analysis, the results show that: Horizontal Well injects steam to steam driving is the best way; the recovery percent is as high as 22.72%. This development mode will work no matter in the short run or getting the economic limit rate.

Abstract: The human error mechanism in coal mine safety is analyzed specifically from safety psychological and physiological factors, workers quality, safety management, safety education, mechanical equipment, and working environment, and also a human error dominant factors classification model playing a great effect on the safety production of coal mine is established with the application of ant clustering algorithm. The experimental results show that management is the key in the human errors of coal mine.

Abstract: Access to distribution grid for distributed photovoltaic (short for PV),technically,it determines solutions in the economic evaluation method.The method combines with comprehensive scoring method,Access to the distribution grid will be different from each program in economic construction,load flow,voltage,power quality,supply reliability and other aspects .Also the transformation of the distribution grid to rate the degree by the weighted average method that determines each PV access solutions the final performance of grid PV Construction method of the process,mainly AHP through index calculation,the access of PV program is evaluated to determine the economic and technical level access solution.This study will greatly enhance the PV grid security that helps PV in our country to develop PV.

Abstract: The reasonability of the adopted capacity load ratio numerical value in urban power grid planning determines the economy of planning level yearly power grid.Too large capacity load ratio will result in the increasing investment in the early period of power grid construction, however, too small capacity load ratio will make the power grid have poor adaptability, affecting the power supply. Reasonably determining the adopted regional power grid capacity load ratio quantitative numerical value in planning has a strong guiding significance for constructing reliable and economic power grid and preventing power grid from excessive advance or lagging behind the load development. This paper, through the statistics and analysis of a certain regional power grid 2010-2012 three years power grid daily load characteristics and the investment benefit evaluation of three years 220KV power grid individual project, makes a preliminary analysis and puts forwards the specific advice on the reasonable values of power grid 35-220KV power transformation capacity load ratio.

Abstract: Article systematic analysis of rural power grid situation, use of existing data resources and distribution lines to achieve the level of automation for reactive power optimization, operation optimization and concrete implementation. Papers able to give a complete, scientific and reasonable reactive power optimization. While article takes DSP2812 as core to developed reactive power compensation controller, to achieve the reactive power compensation, power distribution network detection information, and send messages via GPRS, remote control compensation capacitors. Configuration parameter has a flexible, reliable, convenient and practical features.

Abstract: In the planning and operation of distribution network, flow calculation and optimal flow is the hot issue for many experts and scholars to study. In network reconfiguration, service restoration and capacitor configuration, it needs hundreds even thousands times of power flow calculation. So it is very important to propose a suitable optimization algorithm. Based on the three-phase model we proposed hybrid particle swarm algorithm to calculate the three-phase power flow. The method uses the superposition principle. The distribution network is divided into two network models, one is the pure radial network without cyclic structure, and another is the pure cyclic network without radiation structure. We do iterative calculation respectively using hybrid particle algorithm, getting the calculation results. The hybrid algorithm is a new reference for the future optimization of power flow calculation in this paper.

Abstract: High voltage transmission is a complex process, because partial discharge and various problems of lines will produce current response of different frequency, so it needs vector synthesis in different time and space. In this paper, based on the theory of vector synthesis, through the SIMULINK module of MATLAB software voltage is simulated, we obtain the coupling graph and vector synthesis graph of different voltage. From the curve we can see that before vector synthesis, the voltage has different frequencies and the peak output values, after vector synthesis, the voltage has stable frequency and peak output values, with good transmission effect. It provides the theoretical reference for the research on high voltage power system.