利用天威Co Li Do2.0桌面级3D打印机制备丙烯腈-丁二烯-苯乙烯共聚物(ABS)和聚乳酸(PLA)两种材料的圆筒制件,并对制件进行了测量和实验数据分析。结果表明,圆筒类制件在桌面级打印机可打印尺寸范围内,打印尺寸越大,精度越高;打印相同外...利用天威Co Li Do2.0桌面级3D打印机制备丙烯腈-丁二烯-苯乙烯共聚物(ABS)和聚乳酸(PLA)两种材料的圆筒制件,并对制件进行了测量和实验数据分析。结果表明,圆筒类制件在桌面级打印机可打印尺寸范围内,打印尺寸越大,精度越高;打印相同外径的圆筒类制件时,壁厚越小,打印出来的精度越高。展开更多
目的探讨3D打印技术辅助宫腔镜治疗妊娠物残留的临床价值。方法选择2017年1月~2019年10月行盆腔MRI检查及宫腔镜手术的妊娠物残留46例,按照前瞻性非随机方法分为对照组(n=27)和3D模型组(n=19)。3D模型组利用Mimics Research 20.0软件对...目的探讨3D打印技术辅助宫腔镜治疗妊娠物残留的临床价值。方法选择2017年1月~2019年10月行盆腔MRI检查及宫腔镜手术的妊娠物残留46例,按照前瞻性非随机方法分为对照组(n=27)和3D模型组(n=19)。3D模型组利用Mimics Research 20.0软件对MRI数据进行加工处理并建立虚拟模型,导入3D打印机制造子宫实物模型用于术前病情沟通、制定手术方案及术中指导。比较2组手术时间、一次手术成功率、术中出血量、术后住院时间及并发症。结果2组均顺利完成宫腔镜电切术,3D模型组手术时间明显短于对照组[26(21~95)min vs.55(27~118)min,Z=-3.249,P=0.001]。3D模型组并发症发生率为0,对照组为37%(10/27)(P=0.003)。2组术中出血量、术后住院时间、一次手术成功率差异无显著性(P>0.05)。结论3D模型能够清晰地显示子宫的三维结构,可进行妊娠物残留手术难易度预判和精确定位,有助于缩短手术时间,减少手术并发症,提高手术安全性。展开更多
The major challenge in printable electronics fabrication is to effectively and accurately control a drop-on-demand(Do D) inkjet printhead for high printing quality. In this work, an optimal prediction model, construct...The major challenge in printable electronics fabrication is to effectively and accurately control a drop-on-demand(Do D) inkjet printhead for high printing quality. In this work, an optimal prediction model, constructed with the lumped element modeling(LEM) and the artificial bee colony(ABC) algorithm, was proposed to efficiently predict the combination of waveform parameters for obtaining the desired droplet properties. For acquiring higher simulation accuracy, a modified dynamic lumped element model(DLEM) was proposed with time-varying equivalent circuits, which can characterize the nonlinear behaviors of piezoelectric printhead. The proposed method was then applied to investigate the influences of various waveform parameters on droplet volume and velocity of nano-silver ink, and to predict the printing quality using nano-silver ink. Experimental results show that, compared with two-dimension manual search, the proposed optimal prediction model perform efficiently and accurately in searching the appropriate combination of waveform parameters for printable electronics fabrication.展开更多
文摘目的探讨3D打印技术辅助宫腔镜治疗妊娠物残留的临床价值。方法选择2017年1月~2019年10月行盆腔MRI检查及宫腔镜手术的妊娠物残留46例,按照前瞻性非随机方法分为对照组(n=27)和3D模型组(n=19)。3D模型组利用Mimics Research 20.0软件对MRI数据进行加工处理并建立虚拟模型,导入3D打印机制造子宫实物模型用于术前病情沟通、制定手术方案及术中指导。比较2组手术时间、一次手术成功率、术中出血量、术后住院时间及并发症。结果2组均顺利完成宫腔镜电切术,3D模型组手术时间明显短于对照组[26(21~95)min vs.55(27~118)min,Z=-3.249,P=0.001]。3D模型组并发症发生率为0,对照组为37%(10/27)(P=0.003)。2组术中出血量、术后住院时间、一次手术成功率差异无显著性(P>0.05)。结论3D模型能够清晰地显示子宫的三维结构,可进行妊娠物残留手术难易度预判和精确定位,有助于缩短手术时间,减少手术并发症,提高手术安全性。
基金上海市科委医学引导类(中西医)科技支撑项目(17411960200)Supported by Supporting Project of Medical Guidance(Chinese and Western Medcine)of Sceince and Technology Commission of Shanghai Municipality(17411960200)
基金Projects(2014AA052101-3,2014AA052102)supported by the National High Technology Research and Development Program of ChinaProjects(51205389,61105067)supported by the National Natural Science Foundation of China
文摘The major challenge in printable electronics fabrication is to effectively and accurately control a drop-on-demand(Do D) inkjet printhead for high printing quality. In this work, an optimal prediction model, constructed with the lumped element modeling(LEM) and the artificial bee colony(ABC) algorithm, was proposed to efficiently predict the combination of waveform parameters for obtaining the desired droplet properties. For acquiring higher simulation accuracy, a modified dynamic lumped element model(DLEM) was proposed with time-varying equivalent circuits, which can characterize the nonlinear behaviors of piezoelectric printhead. The proposed method was then applied to investigate the influences of various waveform parameters on droplet volume and velocity of nano-silver ink, and to predict the printing quality using nano-silver ink. Experimental results show that, compared with two-dimension manual search, the proposed optimal prediction model perform efficiently and accurately in searching the appropriate combination of waveform parameters for printable electronics fabrication.
