Noise from the machine on coal working face seriously influenced the miners' physical and mental health, and also, due to the noise, there may be a major hidden danger in safety from accidents as all safety warnin...Noise from the machine on coal working face seriously influenced the miners' physical and mental health, and also, due to the noise, there may be a major hidden danger in safety from accidents as all safety warning signals may be masked by the noise. This paper summarized the features of mine environmental noise on working face, such as the variety of noise sources, the continuity of high intensity and slow attenuation in narrow space, etc.The main projects about noise forecasting and controlling on working face was emphatically expounded;the development status about mines machinery noise mechanism and environmental noise acoustic characteristics of space-time of these main research topics were also introduced.展开更多
In order to improve the quality and efficiency of agriculture,increase farmers'income steadily and rapidly,and improve the ecological environment of agriculture,a strong city of organic agriculture should be const...In order to improve the quality and efficiency of agriculture,increase farmers'income steadily and rapidly,and improve the ecological environment of agriculture,a strong city of organic agriculture should be constructed in Nanchong City.Based on ecological agriculture,Nanchong makes great efforts to build a strong city of organic agriculture,takes environmental protection supervision as an opportunity to promote sustainable agricultural development feasibly,takes regional brands as the starting point,and promotes the development of agricultural brand.The main measures and achievements of the development of organic agriculture in Nanchong City are analyzed and discussed starting with the next work plan.展开更多
基金Supported by the National Natural Science Foundation of China(50975087)the Scientific Research Starting Foundation for Returned Overseas Chinese Scholars,Ministry of Education,China(37)Key Research Project of Hunan Province Office of Education(09A026)
文摘Noise from the machine on coal working face seriously influenced the miners' physical and mental health, and also, due to the noise, there may be a major hidden danger in safety from accidents as all safety warning signals may be masked by the noise. This paper summarized the features of mine environmental noise on working face, such as the variety of noise sources, the continuity of high intensity and slow attenuation in narrow space, etc.The main projects about noise forecasting and controlling on working face was emphatically expounded;the development status about mines machinery noise mechanism and environmental noise acoustic characteristics of space-time of these main research topics were also introduced.
基金Supported by National Modern Agricultural Demonstration Zone Project of the Ministry of Agriculture[Nong Ji Fa(2010)22]Pilot Project of Agricultural Reform and Construction in the National Modern Agricultural Demonstration Zone of the Ministry of Agriculture and the Ministry of Finance[Nong Cai Fa(2013)13]National Agricultural Science and Technology Park Project of the Ministry of Science and Technology[Guo Ke Ban Nong(2015)9]
文摘In order to improve the quality and efficiency of agriculture,increase farmers'income steadily and rapidly,and improve the ecological environment of agriculture,a strong city of organic agriculture should be constructed in Nanchong City.Based on ecological agriculture,Nanchong makes great efforts to build a strong city of organic agriculture,takes environmental protection supervision as an opportunity to promote sustainable agricultural development feasibly,takes regional brands as the starting point,and promotes the development of agricultural brand.The main measures and achievements of the development of organic agriculture in Nanchong City are analyzed and discussed starting with the next work plan.
