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两种探测锉电测根管长度稳定性和准确性的比较 被引量:1
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作者 张杨 孙书昱 《现代医院》 2007年第6期38-39,共2页
目的比较不锈钢根管锉和ProTaper镍钛手用根管锉电测根管长度的稳定性和准确性。方法选择临床需行根管治疗、根尖发育完全的60颗活髓后牙为研究对象。开髓、拔髓后探通根管,在同一颗牙上先用不锈钢锉初尖锉作为NeosonoTM根管长度电测仪... 目的比较不锈钢根管锉和ProTaper镍钛手用根管锉电测根管长度的稳定性和准确性。方法选择临床需行根管治疗、根尖发育完全的60颗活髓后牙为研究对象。开髓、拔髓后探通根管,在同一颗牙上先用不锈钢锉初尖锉作为NeosonoTM根管长度电测仪的探测电极测量根管长度,评价其稳定性,测量稳定的根管则带针拍X光数字成像(radio visio graphy,RVG)牙片评价其准确性,然后用ProTaper手用镍钛初尖锉测量根管长度,同样的方法评价其稳定性和准确性,将结果进行统计分析。结果①不锈钢组EAL(根管长度电测仪)测量稳定的根管数为102个,占65.38%,镍钛组为142个,占34.62%,两者相比有显著性差异。②在两种探测锉测量均稳定的根管中,不锈钢组EAL测量准确的根管数为89个,占87.25%,镍钛组为95个,占93.14%,两者相比无显著性差异。结论大锥度镍钛探测电极下EAL测量稳定性高;探测电极的锥度、材质对EAL测量准确性影响很小。临床上使用大锥度镍钛锉电测根管长度更稳定可靠,且安全准确。 展开更多
关键词 管长度 稳定性 准确性
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测管特性对湖底地层渗透系数测定值的影响 被引量:6
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作者 温忠辉 束龙仓 李伟 《水利水电科技进展》 CSCD 2004年第2期19-20,共2页
为定量计算江苏省张家港市暨阳湖水体渗漏量,在用竖管测定法现场测得29个测点的湖底地层渗透系数值的基础上,通过改变测管的直径和长度,深入分析了测管特性对渗透系数测定值的影响.结果表明:测管的直径和长度对渗透系数的测定值有一定... 为定量计算江苏省张家港市暨阳湖水体渗漏量,在用竖管测定法现场测得29个测点的湖底地层渗透系数值的基础上,通过改变测管的直径和长度,深入分析了测管特性对渗透系数测定值的影响.结果表明:测管的直径和长度对渗透系数的测定值有一定的影响. 展开更多
关键词 竖管定法 湖底地层 渗透系数 测管直径 测管长度
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Analysis of the shape of heavy droplets on flat and spherical surface 被引量:4
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作者 WANG XueWei YU Yang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第6期1118-1124,共7页
In this study,a theoretical model was established for predicting the equilibrium shape of the droplet on flat and spherical surfaces.The theoretical equilibrium shape of heavy droplets could be obtained once contact a... In this study,a theoretical model was established for predicting the equilibrium shape of the droplet on flat and spherical surfaces.The theoretical equilibrium shape of heavy droplets could be obtained once contact angle and volume of droplets were given.It showed that the predictions of the theoretical flat model were in good agreement with the shape obtained by Surface Evolver when the contact angle is below 120 and the droplet size is on the order of capillary length.This available range will decrease and increase when the heavy droplet is on convex and concave spherical surface,respectively,in contrast to that on flat surface.The available range will decrease more for higher curvature of convex spherical surfaces. 展开更多
关键词 equilibrium shape heavy droplet ellipsoidal model Surface Evolver simulation
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Organic single-crystal phototransistor with unique wavelength-detection characteristics 被引量:4
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作者 Mengxiao Hu Jinyu Liu +6 位作者 Qiang Zhao Dan Liu Qing Zhang Ke Zhou Jie Li Huanli Dong Wenping Hu 《Science China Materials》 SCIE EI CSCD 2019年第5期729-735,共7页
Organic phototransistors based on high-quality 2,8-dichloro-5,11-dihexyl-indolo[3,2-b]carbazo(CHICZ)single crystals show the highest photoresponsivity of 3×10^3 A W^-1, photosensitivity of 2×10^4 and the det... Organic phototransistors based on high-quality 2,8-dichloro-5,11-dihexyl-indolo[3,2-b]carbazo(CHICZ)single crystals show the highest photoresponsivity of 3×10^3 A W^-1, photosensitivity of 2×10^4 and the detectivity can achieve 8.4×10^14 Jones. We also discovered good linear dependence of log(photosensitivity) versus the wavelength when the devices were illuminated with a series of sameintensity but different-wavelength lights. The organic phototransistors based on CHICZ single crystal have potential applications in wavelength-detection. 展开更多
关键词 organic phototransistor single crystal photoresponsivity PHOTOSENSITIVITY wavelength-detection
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