仿晶体生长快速算法用于加速2D静磁场设计中的参量扫描

为了加速二维静磁场设计中参量扫描的速度,本文提出仿晶体生长快速算法:网格空间不变,结构在网格空间中微动,利用前一次计算出来的结果,构造新的初解,以提高下一次有限差分法计算矢量磁位的迭代速率。该方法可以将扫描时间平均减少一半以上,并且计算结果与普通计算结果偏离很小。与同类软件相比,采用该方法的参量扫描和优化过程速度更快,也有潜力应用于其他复杂结构的优化过程。

Intraretinal layer segmentation and parameter measurement in optic nerve head region through energy function of spatial-gradient continuity constraint

For the diagnosis of glaucoma,optical coherence tomography(OCT)is a noninvasive imaging technique for the assessment of retinal layers.To accurately segment intraretinal layers in an optic nerve head(ONH)region,we proposed an automatic method for the segmentation of three intraretinal layers in eye OCT scans centered on ONH.The internal limiting membrane,inner segment and outer segment,Bruch’s membrane surfaces under vascular shadows,and interaction of multiple high-reflectivity regions in the OCT image can be accurately segmented through this method.Then,we constructed a novel spatial-gradient continuity constraint,termed spatial-gradient continuity constraint,for the correction of discontinuity between adjacent image segmentation results.In our experiment,we randomly selected 20 B-scans,each annotated three retinal layers by experts.Signed distance errors of?0.80μm obtained through this method are lower than those obtained through the state-of-art method(?1.43μm).Meanwhile,the segmentation results can be used as bases for the diagnosis of glaucoma.

构建专业级歌厅之我见

传统专业级歌厅的设备大多选择模拟调音台,模拟调音台的通道均衡器的调节具有很大的局限性,而使用数字调音台,其通道多段全程扫描数字参量均衡器和其他诸多模拟调音台不具备的功能,将带给调音工作极大方便和更广阔的技术拓展空间。