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Hematite has emerged as a good photocatalyst for efficient solar water splitting due to its favorable optical band gap (2.1–2.2 eV), extraordinary chemical stability in oxidative environment, abundance, and low cost. According to theoretical prediction, the solar-to-hydrogen efficiency of hematite can be 16.8% and the water splitting photocurrent can be 12.6 mA cm−2. However, the practical performance...
The method of quality monitor based on wavelet filtering was proposed to solve the problems of quality control in multi-operation manufacturing processes, whose measurement data contained noise information. The multi-operation machining process quality control model based on the Stream of Variation (SoV) technology was built, which considered the error propagation. Based on this, the method of discrete...
An iterative learning control (ILC) algorithm based on recurrent wavelet neural network(RWNN) is proposed to control product final quality in batch process. recurrent Wavelet neural network is used to modeling long range batch process model. Due to model-plant mismatches and unmeasured disturbances, the calculated control policy based on RWNN model may not be optimal when applied to the actual process...
In semiconductor manufacturing processes, mixed-products are usually fabricated on the same set of process tool with different recipes. Run-to-run controllers which based on the exponential weighted moving average (EWMA) statistic are probably the most frequently used in industry for the quality control of certain semiconductor manufacturing process steps. However, for mixed-product drifting process,...
The quality of aluminum alloy welds is determined by the weld formation and penetration. Usually, the quality of traditional TIG welding almost depends on the skilled welder??s experience rather than theoretical and analytical techniques. At the same time, an industry robot welding system with insufficient feedback control always leads to poor welding quality, especially in manufacturing aluminum...
Traditional workflow management technology can deal with pre-defined business processes well. However, a practical ad-hoc process case in knowledge-intensive domain is often driven by not only process control, but also the real-time application data or user interactions. So the structure of those processes are hard to be completely fixed ahead. In addition, as the only basic element in traditional...
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