By adjusting a variety of different frequency signals, equalizer compensates or optimizes system deficiencies, equalizer is used in voice, communication systems, mechanical vibration, fault diagnosis and many other fields. Traditional analog equalizer has low precision, phase nonlinearity and more distortion characteristics. On the basis of this, a new digital equalization algorithm that abandon the traditional single FIR filter implementation method is proposed, frequency division effect is achieved by multiple phase sub-band filter row and multi-channel digital potentiometer, so the cost of digital equalizer design and difficulty of implementation are reduced, and flexibility of digital equalizer settings on the real-time system is improved. In this paper, QuartusII is applied to functional simulation, and downloaded into the FPGA via JTAG interface to verify the correctness of the results.

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Based on the investigation of electrostatic flocking enterprises and related existing industry standards, combined with the principle of construction the domestic cleaner production index system, a cleaner production evaluation index system of the electrostatic flocking industry was introduced. The system contained six primary level indexes, including production technology and equipment, resources and energy, pollutants, waste recycling, product, environmental management and 21 secondary indexes. Based on multi-level fuzzy method using analytic hierarchy process (AHP) to determine the evaluation index weight, the cleaner production level comprehensive evaluation model was constructed. Applied the model to flocking enterprise A and evaluated its actuality of cleaner production level objectively, to provide references for its development.