Inquiry into Application of Technical Guideline for Noise Environmental Impact Assessment
By studying and applying the Technical Guidelines for Noise Impact Assessment( HJ 2. 4-2009),the paper argues that several issues should be given special attentions during noise impact assessment of construction project,e. g. the evaluation hierarchy,the identification and analysis of noise source intensity,environmental baseline investigation and monitoring,the prediction and assessment of environmental impact,and noise control measures.
Error performance at the physical layer of digital communications equipment is a major ::: factor in determining transmission quality. The ITU-T G.826, G.828, G.829 and G.8201 ::: recommendations identify error parameters for high-speed digital networks in relation ::: to G.821 recommendation. The paper describes the relations between individual error ::: parameters and the error rate. ::: Keywords: CRC-4, BIP-8, digital networks, SDH, block error measurement