[ Objective] The study aims to discuss the feasibility of using a fixed biological bed to treat low-concentration organic waste gas. [ Method] A fixed biological bed was used to treat low-concentration organic waste g...[ Objective] The study aims to discuss the feasibility of using a fixed biological bed to treat low-concentration organic waste gas. [ Method] A fixed biological bed was used to treat low-concentration organic waste gas from a phosphate workshop, and then the waste gas treated was assessed by human sense of smell to determine the most economical empty bed contact time, thereby verifying the feasibility of using a fixed biolog- ical bed to treat low-concentration organic waste gas. [Result] When empty bed contact time was 60 s, the smell of the treated waste gas was acceptable, and COD value of recycled water in the fixed biological bed was essentially unchanged. It proved that organic load of the waste gas was consumed by microorganisms within 60 s. [ Conclusion] It is feasible to use a fixed biological bed to treat Iow-concantration organic waste gas from a phosphate workshop.展开更多
目的建立民航飞行学员视频头脉冲试验(video head impulse test,vHIT)正常参考值,为民航飞行学员前庭功能的准确评估提供参考依据。方法随机选取40例尚处于飞行理论学习阶段的民航飞行学员进行vHIT检测,对前庭-眼反射(vestibulo-ocular ...目的建立民航飞行学员视频头脉冲试验(video head impulse test,vHIT)正常参考值,为民航飞行学员前庭功能的准确评估提供参考依据。方法随机选取40例尚处于飞行理论学习阶段的民航飞行学员进行vHIT检测,对前庭-眼反射(vestibulo-ocular reflex,VOR)的平均增益值及各半规管之间的不对称比进行比较。结果40例民航飞行学员右侧水平、前、后半规管VOR增益值分别为1.05±0.07、0.92±0.13、0.81±0.09,左侧水平、前、后半规管VOR增益值分别为1.00±0.06、0.85±0.10、0.86±0.10,所有受试者均未见补偿性扫视。双侧水平、左前-右后、右前-左后半规管VOR增益值不对称比分别为5.56%±3.64%、9.65%±4.74%、8.68%±7.07%。结论本研究建立了民航飞行学员vHIT正常参考值,为民航飞行学员的选拔及前庭功能鉴定提供了客观依据。展开更多
文摘[ Objective] The study aims to discuss the feasibility of using a fixed biological bed to treat low-concentration organic waste gas. [ Method] A fixed biological bed was used to treat low-concentration organic waste gas from a phosphate workshop, and then the waste gas treated was assessed by human sense of smell to determine the most economical empty bed contact time, thereby verifying the feasibility of using a fixed biolog- ical bed to treat low-concentration organic waste gas. [Result] When empty bed contact time was 60 s, the smell of the treated waste gas was acceptable, and COD value of recycled water in the fixed biological bed was essentially unchanged. It proved that organic load of the waste gas was consumed by microorganisms within 60 s. [ Conclusion] It is feasible to use a fixed biological bed to treat Iow-concantration organic waste gas from a phosphate workshop.
文摘目的建立民航飞行学员视频头脉冲试验(video head impulse test,vHIT)正常参考值,为民航飞行学员前庭功能的准确评估提供参考依据。方法随机选取40例尚处于飞行理论学习阶段的民航飞行学员进行vHIT检测,对前庭-眼反射(vestibulo-ocular reflex,VOR)的平均增益值及各半规管之间的不对称比进行比较。结果40例民航飞行学员右侧水平、前、后半规管VOR增益值分别为1.05±0.07、0.92±0.13、0.81±0.09,左侧水平、前、后半规管VOR增益值分别为1.00±0.06、0.85±0.10、0.86±0.10,所有受试者均未见补偿性扫视。双侧水平、左前-右后、右前-左后半规管VOR增益值不对称比分别为5.56%±3.64%、9.65%±4.74%、8.68%±7.07%。结论本研究建立了民航飞行学员vHIT正常参考值,为民航飞行学员的选拔及前庭功能鉴定提供了客观依据。
