Noise measurement using mobile phones is now developed very well. While there are some good applications for the measurement of noise from road traffic, thus on processing of measured data is only paid a very little a...Noise measurement using mobile phones is now developed very well. While there are some good applications for the measurement of noise from road traffic, thus on processing of measured data is only paid a very little attention. The data, however, are burdened by specific errors and for further work with them it is necessary to adjust and determine their uncertainty. One of the biggest problems is inaccuracy in position versus the noise source and the shortest length of measurement that can be regarded as representative. Imprecision in terms of location can be determined by calculating the variance of possible distance from the noise source, which for measurement of traffic noise requires a map-matching data points both transverse to the street (sidewalk) network and in the longwise direction. During typical urban measurements, this error can even reach 7 - 10 dB. Three basic types of algorithms for the calculation of uncertainty and positional correction based on the type of input and output data (raster, vector, vector-oriented) were tested. Uncertainty in the variability of the measurement data is necessary to determine from the number of passing vehicles per time unit. The presented solutions are implemented in the Mobile Noise system.展开更多
Sustainable development,a concept which has been built with the sustainability of economic progression as a main thrust,has been a widely preferred model to traditional developmental models.However,the real meaning of...Sustainable development,a concept which has been built with the sustainability of economic progression as a main thrust,has been a widely preferred model to traditional developmental models.However,the real meaning of what sustainable development is and should include has been an object of debate.On the one hand,differing from traditional economic developmental models,economic progress does not necessitate the practice of ‘sustainable development'.On the other hand,current levels of science and technology are still unable to solve several problems that arise with economic development.Sustainable development has transferred the responsibility of environmental destruction to that of developing countries.Lastly,instead of utilizing the best technology and leadership into formulating excellent environmental-protection policies,it is more important to create widespread awareness to the public on the need to protect the environment and thereby engage their participation in decision-making to actually realize what is truly ‘sustainable development'.展开更多
文摘Noise measurement using mobile phones is now developed very well. While there are some good applications for the measurement of noise from road traffic, thus on processing of measured data is only paid a very little attention. The data, however, are burdened by specific errors and for further work with them it is necessary to adjust and determine their uncertainty. One of the biggest problems is inaccuracy in position versus the noise source and the shortest length of measurement that can be regarded as representative. Imprecision in terms of location can be determined by calculating the variance of possible distance from the noise source, which for measurement of traffic noise requires a map-matching data points both transverse to the street (sidewalk) network and in the longwise direction. During typical urban measurements, this error can even reach 7 - 10 dB. Three basic types of algorithms for the calculation of uncertainty and positional correction based on the type of input and output data (raster, vector, vector-oriented) were tested. Uncertainty in the variability of the measurement data is necessary to determine from the number of passing vehicles per time unit. The presented solutions are implemented in the Mobile Noise system.
基金financed by BK21 Research Foundation,South Korea
文摘Sustainable development,a concept which has been built with the sustainability of economic progression as a main thrust,has been a widely preferred model to traditional developmental models.However,the real meaning of what sustainable development is and should include has been an object of debate.On the one hand,differing from traditional economic developmental models,economic progress does not necessitate the practice of ‘sustainable development'.On the other hand,current levels of science and technology are still unable to solve several problems that arise with economic development.Sustainable development has transferred the responsibility of environmental destruction to that of developing countries.Lastly,instead of utilizing the best technology and leadership into formulating excellent environmental-protection policies,it is more important to create widespread awareness to the public on the need to protect the environment and thereby engage their participation in decision-making to actually realize what is truly ‘sustainable development'.
