Search

To inhibit the agglomeration of nano zero-valent iron (Fe0) during the reaction, Fe0/NBC supported catalyst was prepared by loading Fe0 on the surface of nitrogen-containing biochar (NBC), and characterized by X-ray diffractometer, specific surface area analyzer and scanning electron microscopy. Fe0/NBC was applied to activate peroxymonosulfate (PMS) for the degradation of tetracycline (TC), and the results indicated that of 93.1% TC was removed after 120 min of reaction. Fe0/NBC showed higher catalytic activity than that of pure Fe0 and NBC. The effects of inorganic ions and natural organic matters on the catalytic performance of was investigated, and the produced reactive oxygen species in Fe0/NBC/PMS system were determinated by radical quenching and electron paramagnetic resonance (EPR) tests. Stability experiments suggested Fe0/NBC had a good reusability and showed good application prospect in the treatment of antibiotics in the wastewater.

The multi-information fusion method of health monitoring based on evidence theory is used to study the problem of equipment fault diagnosis. The multi-information of fault monitoring is fused by the evidence theory and the reliability of the relevant evidence can be judged according to the ambiguity and uncertainty of the fault monitoring signal. Also it can determine the importance and reliability of the evidence from different sources. The data from multi-information fusion has higher reliability and accuracy which provides more reliable data for fault diagnosis.

The demands of the ability of industrial automotive production are rising. The precision positioning is the most important among the manufacturing and measuring. Molds might result in making equipment deviations via poor accuracies on mass production because of the poor design and front processing. It influences the qualities of products, or damages the mold themselves. Based on the Hot-Embossing process, the study designed a set including the Hot-Embossing machine with platform for positioning system holding the mold. The positioning and adjusting function, with X, Y, C axis, separates the Hot-Embossing machine from the traditional one. Taken smart phone case as the experimental designed concept and verified the pressing molds with the final thickness with the before and after correction for lengths, wide, and the error values of horizontal symmetry to investigate the accuracies of positioning capability. Then, verifying the Hot-Embossing machine from reconstruction of the product.

Anning River basin as an important soil erosion monitoring and reserve in Sichuan Province. It is of great significance to grasp the temporal and spatial changes of soil erosion in this area in time to realize the comprehensive treatment of regional soil erosion. Based on the revision of the general soil erosion equation (RUSLE), the present situation of soil erosion erosion in 1995-2015 years in this area was monitored, and the classification was completed according to the national grading criteria, and the following results were mainly achieved:(1) Soil erosion in Anning river basin as a whole presents a low gradient change in the eastern High West.(2) The proportion of raster in soil erosion area of each grade also showed different structural differences, which showed that the degree of micro > Mild > Moderate > Strong > Extremely > severe, and the proportion of raster in mild and below intensity erosion area reached more than 80%, and the whole basin was at mildly below erosion level.(3) One-dimensional linear regression analysis shows, within 20 years, about 90% of the raster cell slope in this area is negative, the overall change trend of soil erosion in this area shows a significant improvement

The deep volcanic reservoir in Zhungeer Basin is buried in over 4000m depth, which is characterized by complex lithology (breccia, andesite, basalt, etc.), high elastic modulus and massive natural fractures. During hydraulic fracturing, hydraulic fracture will propagate and natural fractures will be triggered by the increasing net pressure. However, the extension of fractures, especially natural fractures, would aggravate the leak-off effect of fracturing fluid, and consequently decrease the fracturing success rate. 4 out of 12 fracturing wells in the field have failed to add enough proppants due to fluid loss. In order to increase the success rate and efficiency of hydraulic fracturing for deep volcanic reservoir, based on theoretical and experimental method, the mechanism of fracturing fluid leak-off is deeply studied. We propose a dualistic proppant scheme and employ the fluid loss reducer to control the fluid leak-off in macro-fractures and micro-fractures respectively. The proposed technique remarkably improved the success rate in deep volcanic rock fracturing. It bears important theoretical value and practical significance to improve the hydraulic fracturing design for deep volcanic reservoir.

Deep volcanic reservoir in Xinjiang Zhungeer basin is buried over 4000m, the elastic modulus of reservoir rocks is high, hence it is difficult to initiate hydraulic fracture during fracturing operation; fracturing fluid filtration is serious and hard to be controlled due to the massive natural fractures in reservoir. Because of the serious heterogeneity along both horizontal and vertical direction, the optimum targets of design fracturing for different well layers are not the same. 4 out of 12 fracturing wells have not achieved the target amount of proppant. Ultimately, fracturing success rate is low and the production increase after fracturing shows a big difference among different wells. In order to improve the success rate and efficiency of deep volcanic reservoir fracturing, based on the analysis of the difficulties in previous fracturing operation, combined with the geological characteristics of reservoir, we optimized the key engineering parameters of deep volcanic rock fracturing, including perforation parameters, filtration parameters, fracture parameters and operation parameters. Results of fracturing design optimization bear an important guiding significance for improving the fracturing success rate and efficiency of deep volcanic reservoir in Zhungeer basin, Xinjiang province.