煤坪粉尘治理装备需具有覆盖范围广,易维护,能够集中控制等特点,采用工业用降尘装置——雾炮机,降尘效率在75%以上,粉尘治理效果明显但噪声影响周围居民,亟须治理。为此实测了雾炮机运行过程中的噪声,分析了噪声来源,提出了以控制气动...煤坪粉尘治理装备需具有覆盖范围广,易维护,能够集中控制等特点,采用工业用降尘装置——雾炮机,降尘效率在75%以上,粉尘治理效果明显但噪声影响周围居民,亟须治理。为此实测了雾炮机运行过程中的噪声,分析了噪声来源,提出了以控制气动噪声为主的治理思路,设计了微孔板结构的降噪装置,实测应用过程中能将雾炮机进风端1 m范围的噪声由112.6 dB降至72 d B以下,有效地降低雾炮机运行过程中的噪声,为雾炮机在煤坪粉尘治理过程的应用推广提供了基础。展开更多
This paper presents an investigation to evaluate the reading speed and reading comprehension of non-native English speaking students by presenting a simple analytical model. For this purpose, various readability softw...This paper presents an investigation to evaluate the reading speed and reading comprehension of non-native English speaking students by presenting a simple analytical model. For this purpose, various readability softwares were used to estimate the average grade level of the given texts. The relationship between the score obtained by the students and their reading speed under average grade level 9 and 14 using font size 12 and 14 is presented. The experimental results show that the reading speed and the score versus the students may be explained by a linear regression. Reading speed decreases as the score decreases. The students with a higher magnitude of reading speed scored better marks. More importantly, we find that the reading speed of our students is lower than the native English speakers. This approach of modeling the readability in linear form significantly simplifies the readability analysis.展开更多
文摘煤坪粉尘治理装备需具有覆盖范围广,易维护,能够集中控制等特点,采用工业用降尘装置——雾炮机,降尘效率在75%以上,粉尘治理效果明显但噪声影响周围居民,亟须治理。为此实测了雾炮机运行过程中的噪声,分析了噪声来源,提出了以控制气动噪声为主的治理思路,设计了微孔板结构的降噪装置,实测应用过程中能将雾炮机进风端1 m范围的噪声由112.6 dB降至72 d B以下,有效地降低雾炮机运行过程中的噪声,为雾炮机在煤坪粉尘治理过程的应用推广提供了基础。
文摘This paper presents an investigation to evaluate the reading speed and reading comprehension of non-native English speaking students by presenting a simple analytical model. For this purpose, various readability softwares were used to estimate the average grade level of the given texts. The relationship between the score obtained by the students and their reading speed under average grade level 9 and 14 using font size 12 and 14 is presented. The experimental results show that the reading speed and the score versus the students may be explained by a linear regression. Reading speed decreases as the score decreases. The students with a higher magnitude of reading speed scored better marks. More importantly, we find that the reading speed of our students is lower than the native English speakers. This approach of modeling the readability in linear form significantly simplifies the readability analysis.
