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In this study, the effect ofPhanerochaete chrysosporiumon graphite was investigated, and graphite was used as a substitute of elemental carbon in carbonaceous gold ores. Under the condition of optimum process, the fungal degradation rate of graphite reached to 13.49%, and the carbon content of graphite was decreased by 5.13%. XRD analysis indicated thatPhanerochaete chrysosporiumcould destroy the crystal structure of graphite. FTIR analysis indicated thatPhanerochaete chrysosporiumcould increase the number of aliphatic structures and oxygen-containing groups. The cyanide leaching gold tests showed thatPhanerochaete chrysosporiumcan decrease the preg-robbing capacity of graphite, about 9.52%. It indicated thatPhanerochaete chrysosporiumis an available microorganism, which was employed to pre-treat carbonaceous matter in carbonaceous gold ores to reduce the interference of gold cyanidation leaching.

The traditional optical fiber network fault detection method has not considered the relationship between the fault characteristics and KNN parameters, it is optimized separately, and the accuracy of optical fiber network fault diagnosis is low. The synchronous optimization fault detection model of fault characteristics detection model parameters is proposed. The candidate feature subsets and K adjacent parameters are used to construct the optical fiber network fault detection model. The improved genetic algorithm is used to solve the mathematical model, and the better accurate rate of fault diagnosis for optical fiber network is obtained. The simulation is taken for testing the performance of model, compared to the traditional model, the new model has better accurate detection rate, and the detection accuracy is improved greatly, the efficiency of optical fiber network fault detection is improved, it has great application value in practice.

The torque vibration derived from in-wheel-motor transmitted to body frame through suspension system without the absorption of mechanical transmission parts, then excited every body panel to shape the vehicle interior noise, which influenced the quality of the vehicle NVH. This paper aims to build an accurate suspension system simulation model to analyze the influence of suspension parts parameters to system vibration transmission property. Basis on a novel empirical model of rubber bushing, a multi-rigid suspension model and a multi-flexible suspension model had been established respectively. The vibration characteristics of two models were simulated, furthermore the swept-sine exciting vertical force signal on wheel contact point were input on the simulation models to find the difference between rigid and flexible model. The simulation results show that: the multi-flexible model can reflect the vibration characteristics of the suspension system more accurately in the high frequency range and so is it more applicable to the simulation analysis of vibration characteristics of in-wheel-motor electric vehicle suspension system.

Down-hole oil-water separation and reinjection in the same well system can reduce the cost of lifting the water and the ground pollution due to the treatment of production water, which can bring good economic and environmental benefits. By combining down-hole oil-water separation technology with surface driving single screw pump oil production technology, the author designed an innovative system of down-hole oil-water separation and reinjection in the same well. In this paper, the general structure, working principle and structure characteristics of the system are introduced. The structure composition and the connection method of each part are described, and the calculation method of basic parameters of the single screw pump in the system is given.

Structure composition and working principle of hydraulic driven downhole twin-screw pump are firstly introduced, and the calculation method of work and structure parameters when downhole twin-screw pump and turbine motor operate is given, and dynamic measuring process when ground power pump, turbine motor and downhole twin-screw pump coordinate is also given. The given calculation process which is derived after sufficiently considering working principle and structure features of the pump, is instructive to the design of this kind of downhole twin-screw pump, and also provides technical support for series design of hydraulic driven downhole twin-screw pump in the future.

Helical axial multiphase pump is a new kind of pump which can pump and transport a mixture of oil, water and gas. The greatest advantage of the pump is that it can pump and transport gas and fluid at the same time, can adapt air plug and liquid slug and is insensitive to solid particle. The pump is currently drived by submersible motor. However, hydraulic drive, a new kind of drive type, is firstly put forward in this paper. This paper introduces the structure of the hydraulic helical axial multiphase pump, offers an evidence for the research development and production of the pump, deduces the calculating method of power matching of the pump and provides theory basis for the application of the new-type pump in oil exploitation in the future.