Surface modification of medical implants was considered as an effective method to improve the cellular behaviors and the integration of tissue onto materials. The micro-nanostructured surface on the titanium alloy was...Surface modification of medical implants was considered as an effective method to improve the cellular behaviors and the integration of tissue onto materials. The micro-nanostructured surface on the titanium alloy was prepared by laser treatment and multiple acid etching. The surface morphologies of different titanium alloy substrates were characterized by scanning electron microscopy (SEM). The effects of micro-nanostructured surfaces on the cellular responses were investigated in vitro by observing hydroxyapatite formation, cell morphology and cell adhesion. The results indicate that the micro-sized structure promoted the adhesion and proliferation of cultured osteoblasts. Furthermore, the micro-nanostructured surface was more conducive to cell adhension stretching compared with the micro-structured surface. All results suggest that the micro-nanostructured surface improved the biocompatibility and integration of tissue onto titanium alloy implants.展开更多
直流开关设备是直流输电系统换流站的重要设备,主要用于直流输电系统运行方式的转换、故障的清除以及检修隔离等目的,关系到输电系统的可靠性、可利用率、可维护性。笔者以平高集团自主研制的1 120 k V直流旁路开关为例,应用ANSYS软件...直流开关设备是直流输电系统换流站的重要设备,主要用于直流输电系统运行方式的转换、故障的清除以及检修隔离等目的,关系到输电系统的可靠性、可利用率、可维护性。笔者以平高集团自主研制的1 120 k V直流旁路开关为例,应用ANSYS软件对直流旁路开关的温升试验进行仿真分析计算,然后又进行了实际的温升试验,并且将实际试验的数据与仿真后的数据结果进行了对比。对比结果表明,两者的差别并不大,结果验证了该仿真方法的可行性与有效性,对于直流旁路开关试验的验证具有重要的指导意义。展开更多
基金Projects(5117530651575320)supported by the National Natural Science Foundation of China+1 种基金Project(TS20130922)supported by the Taishan Scholar Foundation,ChinaProject(2014JC020)supported by the Fundamental Research Funds for the Central Universities of China
文摘Surface modification of medical implants was considered as an effective method to improve the cellular behaviors and the integration of tissue onto materials. The micro-nanostructured surface on the titanium alloy was prepared by laser treatment and multiple acid etching. The surface morphologies of different titanium alloy substrates were characterized by scanning electron microscopy (SEM). The effects of micro-nanostructured surfaces on the cellular responses were investigated in vitro by observing hydroxyapatite formation, cell morphology and cell adhesion. The results indicate that the micro-sized structure promoted the adhesion and proliferation of cultured osteoblasts. Furthermore, the micro-nanostructured surface was more conducive to cell adhension stretching compared with the micro-structured surface. All results suggest that the micro-nanostructured surface improved the biocompatibility and integration of tissue onto titanium alloy implants.
文摘直流开关设备是直流输电系统换流站的重要设备,主要用于直流输电系统运行方式的转换、故障的清除以及检修隔离等目的,关系到输电系统的可靠性、可利用率、可维护性。笔者以平高集团自主研制的1 120 k V直流旁路开关为例,应用ANSYS软件对直流旁路开关的温升试验进行仿真分析计算,然后又进行了实际的温升试验,并且将实际试验的数据与仿真后的数据结果进行了对比。对比结果表明,两者的差别并不大,结果验证了该仿真方法的可行性与有效性,对于直流旁路开关试验的验证具有重要的指导意义。
