目的利用环境扫描电镜-X射线能谱仪(environmental scanning electron microscope and energydispersive X-ray microanalyser,ESEM-EDX)研究电流斑微观形态特征及元素构成,以期为电流斑及电击死的鉴定提供更准确、客观的依据。方法用ES...目的利用环境扫描电镜-X射线能谱仪(environmental scanning electron microscope and energydispersive X-ray microanalyser,ESEM-EDX)研究电流斑微观形态特征及元素构成,以期为电流斑及电击死的鉴定提供更准确、客观的依据。方法用ESEM-EDX检测5例电流斑的扫描电镜形态、金属颗粒的形态及其元素组成。结果电流斑及周围皮肤可见电穿孔、金属熔珠,熔珠主要由铁、铜、铝等常见金属元素和金、钛、钡等人体少见的金属元素构成。结论 ESEM-EDX检测可为电击死的鉴定提供客观的依据。展开更多
文章对合肥膨胀土做无荷载膨胀试验,分别选取原状土、浸水3h、浸水24h及浸水72h土样进行电镜扫描;基于ArcGIS软件对环境扫描电子显微镜(environmental scanning electron microscope,ESEM)图像进行三维信息的提取,分析不同浸水时间下原...文章对合肥膨胀土做无荷载膨胀试验,分别选取原状土、浸水3h、浸水24h及浸水72h土样进行电镜扫描;基于ArcGIS软件对环境扫描电子显微镜(environmental scanning electron microscope,ESEM)图像进行三维信息的提取,分析不同浸水时间下原状膨胀土的微结构、颗粒(团聚体)三维分形维数。结果表明:随着浸水时间增加,膨胀土的膨胀速率逐渐减小,并趋于0;而颗粒自相似性变差,即颗粒三维分形维数逐渐减小。展开更多
Tensile tests parallel to the grain were carried out on LV mode in an environmental scanning electron microscope(ESEM)chamber on Picea jezoensis var. microsperma sample. Displacement and strain fields for different lo...Tensile tests parallel to the grain were carried out on LV mode in an environmental scanning electron microscope(ESEM)chamber on Picea jezoensis var. microsperma sample. Displacement and strain fields for different load levels under proportion limit were obtained from digital image correlation method(DSCM). Heterogeneous microstructural influence on mechanical properties of wood were analysed.展开更多
文摘目的利用环境扫描电镜-X射线能谱仪(environmental scanning electron microscope and energydispersive X-ray microanalyser,ESEM-EDX)研究电流斑微观形态特征及元素构成,以期为电流斑及电击死的鉴定提供更准确、客观的依据。方法用ESEM-EDX检测5例电流斑的扫描电镜形态、金属颗粒的形态及其元素组成。结果电流斑及周围皮肤可见电穿孔、金属熔珠,熔珠主要由铁、铜、铝等常见金属元素和金、钛、钡等人体少见的金属元素构成。结论 ESEM-EDX检测可为电击死的鉴定提供客观的依据。
文摘文章对合肥膨胀土做无荷载膨胀试验,分别选取原状土、浸水3h、浸水24h及浸水72h土样进行电镜扫描;基于ArcGIS软件对环境扫描电子显微镜(environmental scanning electron microscope,ESEM)图像进行三维信息的提取,分析不同浸水时间下原状膨胀土的微结构、颗粒(团聚体)三维分形维数。结果表明:随着浸水时间增加,膨胀土的膨胀速率逐渐减小,并趋于0;而颗粒自相似性变差,即颗粒三维分形维数逐渐减小。
文摘Tensile tests parallel to the grain were carried out on LV mode in an environmental scanning electron microscope(ESEM)chamber on Picea jezoensis var. microsperma sample. Displacement and strain fields for different load levels under proportion limit were obtained from digital image correlation method(DSCM). Heterogeneous microstructural influence on mechanical properties of wood were analysed.
