An odorous eliminator consists of the three systems： Firstly, an oxidation system by ozone gas obtained from an ozone generator, type corona discharge was used as an oxidizing agent. This gas has got enough concentra...An odorous eliminator consists of the three systems： Firstly, an oxidation system by ozone gas obtained from an ozone generator, type corona discharge was used as an oxidizing agent. This gas has got enough concentration to eliminate malodor and poisonous gas especially H2S. Alternatively, the excess concentration of ozone gas could be used for disinfection into an oxidized bag; Secondly, the odorous was trap and disinfection system by acid or base and water for disinfection air pollution from incomplete oxidation before transfer to an adsorption system; Finally, the adsorption system which is contained high efficiency activated carbon was used as an adsorbent. This research was undertaken to study the method of improving the adsorption capacity of coconut shell-based activated carbon for H2S by surface oxidation and metal addition techniques. The carbon sample treated with 6.0 M HNOs and Zn impregnation gave the highest adsorption capacity for H2S, with increased adsorption efficiency of 230% over that of the untreated sample at 45 ℃. The maximum increase of 180% adsorption efficiency over that of untreated sample was observed for the O3 oxidized sample impregnated with Zn.展开更多
This paper presents the study of vibration in each element of hard disk drive, especially the resonance of the actuator arm. The resonance occurs in hard disk drive is considered as one of the quality controlled param...This paper presents the study of vibration in each element of hard disk drive, especially the resonance of the actuator arm. The resonance occurs in hard disk drive is considered as one of the quality controlled parameter. The main purpose of the research is to investigate the relationship between the pivot bearing assembly process and the natural frequency of the actuator arm. The experiment is designed using the information from the hard disk drive manufacturer. The selected pivot bearing assembly process parameters have been controlled. The modal analysis of the assembled actuator arms has been done. The experiment results show the relationship of the specific process parameters and some of the actuator arm＇s modal frequency. The results also show that the affected vibration mode is the torsion mode only.展开更多
文摘An odorous eliminator consists of the three systems： Firstly, an oxidation system by ozone gas obtained from an ozone generator, type corona discharge was used as an oxidizing agent. This gas has got enough concentration to eliminate malodor and poisonous gas especially H2S. Alternatively, the excess concentration of ozone gas could be used for disinfection into an oxidized bag; Secondly, the odorous was trap and disinfection system by acid or base and water for disinfection air pollution from incomplete oxidation before transfer to an adsorption system; Finally, the adsorption system which is contained high efficiency activated carbon was used as an adsorbent. This research was undertaken to study the method of improving the adsorption capacity of coconut shell-based activated carbon for H2S by surface oxidation and metal addition techniques. The carbon sample treated with 6.0 M HNOs and Zn impregnation gave the highest adsorption capacity for H2S, with increased adsorption efficiency of 230% over that of the untreated sample at 45 ℃. The maximum increase of 180% adsorption efficiency over that of untreated sample was observed for the O3 oxidized sample impregnated with Zn.
文摘This paper presents the study of vibration in each element of hard disk drive, especially the resonance of the actuator arm. The resonance occurs in hard disk drive is considered as one of the quality controlled parameter. The main purpose of the research is to investigate the relationship between the pivot bearing assembly process and the natural frequency of the actuator arm. The experiment is designed using the information from the hard disk drive manufacturer. The selected pivot bearing assembly process parameters have been controlled. The modal analysis of the assembled actuator arms has been done. The experiment results show the relationship of the specific process parameters and some of the actuator arm＇s modal frequency. The results also show that the affected vibration mode is the torsion mode only.
