An attempt has been made to study the pretreatment of sulfidic refractory gold ore with pyrolusite. The influences of various parameters were studied to optimize the conditions. The optimum leaching conditions were pyrolusite/gold ore mass ratio of 3.0, H2SO4concentration of 3.0 M, temperature of 100°C, particle size of 45μm, stirring speed of 200 rpm. After the pretreatment, gold and silver were exposed, these made the extraction of the precious metal in the gold ore much easier.

A pre-cleaning and an electroless nickel plating (EN-HP) were applied to copper foil to improve its tribological behaviour and corrosion resistance. The coating porosity was measured by the corrodkote, tribological behaviour was measured with microhardness tester and a CSM ball-on-disk tribometer, corrosion resistance was measured by potentiodynamic polarization in 3.5 wt.% NaCl solution. Matte nickel plating (mNi) and moderate compact Ni–P coating (EN-MP) were made as comparisons to EN-HP in those tests. By deposition of EN-HP, both coating porosity and tribological behaviour are greatly improved compared to mNi, and the corrosion resistance is distinctly ameliorated to the comparisons. Above research demonstrates that the copper foil with EN-HP coating is good underlay in assemblage of machine.

The wave-like Ni is synthesized without any impurity via varying the addition of surfactant PVP, its microwave absorption can be attributed to dielectric loss and magnetic loss, and exhibits an maximum absorption value of -14.19 dB at 14.2 GHz.

Visualization Engineering Simulation Based on HTML5 and Cloud Computing is the first product using web technology in the development of simulation.This hardware simulation platform is a visualization simulation platform like Simulink, which is based on the browser, and provides a integrated environment with dynamic systems modeling, simulation and comprehensive analysis. The platform adopted HTML5 system, realize the cross-platform simulation.By calling the HTML5 standard Canvas 2D Graphics and other new technology, developers can visually control elements and logic circuit simulation tests, and it truly realize the span of PC, Android, BB10 and other operating system platforms for the work.Simulation of the platform carry out in the clouds,and the simulation process lower the requirements over equipment, therefore the requirements on the hardware in developing becomes transparency.Long term, the platform will be the focus shifted to engineering simulation development of Internet air.

Spheric SiO2 nanoparticles with the sizes distribution between 20-80 nm dispersed in nonaqueous solvent were prepared under the assistance of surfactant. Shear emulsification time was a key role for the dispersion of nanoparticles and the optimal value was 30 min with the smallest median size of 51 nm. The relationship between fluid viscosity and dispersion condition was researched, and the results demonstrated that the additional volume arising from aggregation interspaces enhanced shear fore and opposite resistance and finally the viscosity increased.