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To achieve an efficient lubricated interface on titanium alloy (Ti6Al4V) alloy, polyelectrolyte multilayer (PEM) polymer coatings, based on poly(ethyleneimine)/poly(acrylic acid) (PEI/PAA), were fabricated on the surface of Ti6Al4V alloy substrates using the layer-by-layer (LbL) assembly technique. Their composition and morphology were confirmed by Fourier-transform infrared/attenuated total reflectance (FTIR/ATR) spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. The tribological properties were investigated by a ball-on-disk rotating tribometer using deionized water, saline, and calf serum. The results exhibit that (PEI/PAA)*n coatings have the internal cross-linked network and porous structure on the surface. The surface of PEI/PAA coatings-modified Ti6Al4V shows the sufficient wettability. The polymer-bearing interface of (PEI/PAA)*10 exhibits a low friction coefficient, 0.059, for 2 hr, and represents an 88% decline compared with bare Ti6Al4V. Moreover, the wear track on the polymer-bearing interface is superlow. There is no obvious wear volume, which indicates effective wear resistance. The hydrated layer, the cross-linked network structure, and the porous structure of PEM coatings are the main factors for efficient tribological properties. The multilayer PEI/PAA coating shows the potential uses of developing the lubricated-bearing interface on Ti6Al4V alloy.

Real-time image processing system is widely used in many field, it is required to have high speed. In order to satisfy the demand, an image processing system structure based on DSP and FPFA is presented, that is DSP is used as advanced image processing unit and FPGA as logic unit for image sampling and display. The hardware configuration and working principle is introduced firstly, and then some key problems which include of image data stored mode, color space conversion and image transmission based on EDMA are described. Finally the program flowchart for developing image processing software is given. The developed system can acquire image, display image and make some image processing operations which include of geometry transform, orthographic transform, operations based on pixels, image compression and color space conversion. The developed system can meet the real-time requirement and has been used in our teaching.

Having analyzed the function of an LR analyzer, the paper reduces the LR analyzer used in artificial intelligence inference, which based on objectives, is more simple and more efficient than the general conventions one. It illustrates a far-ranging application prospect for study on intelligent problems based on objectives.