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With the Internet expanding quickly and there being a tremendous underlying market for digital content distributing, it brings a new technology that protects digital content from pirating and destroying--digital rights management (DRM),DRM not only protects content by encrypting, but also protects the content creator and owners rights and interests. The article primarily studies the multimedia courseware DRM in the distance network learning system. It firstly introduces the DRM based theory, then presents a DRM structure model and functional model, which is very important for the ulterior development.

In this paper, author presents a new computational model where both the results of emotional interactions from the intrinsic emotion and recognition and the extrinsic environmental stimulation (another agent), the two parts play an important role in everyday life. We take a kind of six basic emotion states (happiness, surprise, anger, fear, sadness, disgust), and updates its state depending on its current emotional and cognitive state and meeting with another one in random environment. At last, we also design some experiments to verify the effects of affective cognitive algorithm. Those experimental results are accordance with the emotion principle of human being.

The layer of Al-modified austenitic stainless steel was formed by laser cladding with pre-placed FeNiCrAl powder on 304SS surface. No porosity and free of cracks was observed at power density of 31.25 w·s·mm-2. The microstructure of cladded layer was observed by OM (optical microscope) and SEM (scanning electron microscope). Compared with 304 (the substrate), laser cladding FeNiCrAl layer exhibit excellent pitting resistance in mixed acid solution. Anodic polarization curve indicated that the corrosion potential of laser cladding layer was 70 mV higher than that of 304SS (-345.7 mV), while self-corrosion current density of 304SS was 2.4 times as high as that of laser cladding layer.

An approach for fabricating functionally graded specimens of Co-based alloy and molybdenum disilicide (MoSi2) compositions via Selective Laser Cladding (SLD) is presented. The focus aimed at using the functionally graded material (FGM) concept to gradually grade powdered compositions of MoSi2 within a base material of Co-based alloy. A high power CO2 laser was used to process the material compositions to a high density with gradual but discrete changes between layered compositions. The graded specimens initially consisted of 100% Co-based alloy with subsequent layers containing increased volume compositions of MoSi2 (0-80wt.%). Specimens were examined for porosity, phase composition and microstructure. It was found that crack sensitivity of layer can be reduced by adding Co-based alloy into the pure MoSi2 powder.

The fuzzy adaptive integral sliding mode control is used, take advantage of sliding mode switching surface weaken the steady-state error and improve robust performance and the precision of steady-state of single maglev guiding system. the output of fuzzy adaptive controller is used to replace the output of switch control for the chattering problem of sliding mode control, and the adaptive control is introduced to estimate and adjust the fuzzy and clear gravity center value. Simulation results show that system achieves good performance with strong robustness.

For external disturbances and parameter perturbation problem of Electromagnetic guiding system, the adaptive sliding mode control method is used, take advantage of sliding mode switching surface eliminate the steady-state error and increase the precision at steady-state and robust performance of single electromagnetic guiding system. Matlab Simulation results show that the proposed control strategy shows good tracking performance and strong robustness