排序方式: 共有4条查询结果,搜索用时 171 毫秒
1
1.
Mohsen Aliabadi Rostam Golmohammadi Muharram Mansoorizadeh 《Environmental monitoring and assessment》2014,186(3):1855-1864
It is highly important to analyze the acoustic properties of workrooms in order to identify best noise control measures from the standpoint of noise exposure limits. Due to the fact that sound pressure is dependent upon environments, it cannot be a suitable parameter for determining the share of workroom acoustic characteristics in producing noise pollution. This paper aims to empirically analyze noise source characteristics and acoustic properties of noisy embroidery workrooms based on special parameters. In this regard, reverberation time as the special room acoustic parameter in 30 workrooms was measured based on ISO 3382-2. Sound power quantity of embroidery machines was also determined based on ISO 9614-3. Multiple linear regression was employed for predicting reverberation time based on acoustic features of the workrooms using MATLAB software. The results showed that the measured reverberation times in most of the workrooms were approximately within the ranges recommended by ISO 11690-1. Similarity between reverberation time values calculated by the Sabine formula and measured values was relatively poor (R 2?=?0.39). This can be due to the inaccurate estimation of the acoustic influence of furniture and formula preconditions. Therefore, this value cannot be considered representative of an actual acoustic room. However, the prediction performance of the regression method with root mean square error (RMSE)?=?0.23 s and R 2?=?0.69 is relatively acceptable. Because the sound power of the embroidery machines was relatively high, these sources get the highest priority when it comes to applying noise controls. Finally, an objective approach for the determination of the share of workroom acoustic characteristics in producing noise could facilitate the identification of cost-effective noise controls. 相似文献
2.
Anwari Rostam Ali Coskun Sezen Saltan Mehmet 《Journal of Material Cycles and Waste Management》2023,25(1):258-271
Journal of Material Cycles and Waste Management - In this study, utilization of waste fluorescent lamp as mineral filler in asphalt mixture was investigated. The phosphorus powder of fluorescent... 相似文献
3.
Iraj Mohammadfam Omid Kalatpour Rostam Golmohammadi Hasan Khotanlou 《Journal of Loss Prevention in the Process Industries》2013,26(6):1300-1307
Process equipment failures (PEFs) are one of the most important causes of process incidents occurrences. To investigate and prevent the PEFs, in addition to having the previous data, it is necessary to have some resources of the PEFs domain knowledge. Nowadays, PEFs data are usually retrieved from existent databases. Customary databases present only previously stored data of equipment failures but, for carrying out a comprehensive PEFs management it is necessary to have access to the PEFs desired knowledge and not only stored data. This paper aims to offer a knowledge base for the PEFs through adopting an ontological approach and then to use the proposed knowledge base for further applications particularly, process incident investigation activities. Through adding semantic search capability, the proposed knowledge base could upgrade the data presenting feature of the common databases into a knowledge presenting feature. Using this approach, the user would be able to extract the desired knowledge of the PEFs along the virtual stored data of occurred cases. The knowledge extraction process and the data mining of occurred incidents are both necessary for the PEFs investigation. 相似文献
4.
Maleki-Kakelar Mahdi Azarhoosh Mohammad Javad Golmohammadi Senji Sina Aghaeinejad-Meybodi Abbas 《Environmental science and pollution research international》2022,29(10):13767-13781
Environmental Science and Pollution Research - To commercialize the biocementation through microbial induced carbonate precipitation (MICP), the current study aimed at replacing the costly standard... 相似文献
1