由两张照片确定物体的三维结构

本文介绍一种体视学方法～双平面成像体视法。这种方法只要从不同角度拍摄物体的两张照片，通过计算机的计算来确定物体的三维结构。目前流行的体视学方法，无论是从随机切片中统计出三维参数还是连续切片的三维重建，都相当于用一只眼睛观看大量景物之后所作的综合。本文提出的方法相当于人类用两只眼睛观察物体产生的立体视觉。该法所需信息量少（只需物体的两张照片），算法简便，计算结果精确。是一种值得推广的体视学方法。     

Local conformal autoencoder for standardized data coordinates

We propose a local conformal autoencoder (LOCA) for standardized data coordinates. LOCA is a deep learning-based method for obtaining standardized data coordinates from scientific measurements. Data observations are modeled as samples from an unknown, nonlinear deformation of an underlying Riemannian manifold, which is parametrized by a few normalized, latent variables. We assume a repeated measurement sampling strategy, common in scientific measurements, and present a method for learning an embedding in Rd that is isometric to the latent variables of the manifold. The coordinates recovered by our method are invariant to diffeomorphisms of the manifold, making it possible to match between different instrumental observations of the same phenomenon. Our embedding is obtained using LOCA, which is an algorithm that learns to rectify deformations by using a local z-scoring procedure, while preserving relevant geometric information. We demonstrate the isometric embedding properties of LOCA in various model settings and observe that it exhibits promising interpolation and extrapolation capabilities, superior to the current state of the art. Finally, we demonstrate LOCA’s efficacy in single-site Wi-Fi localization data and for the reconstruction of three-dimensional curved surfaces from two-dimensional projections.     

N1pc reversal following repeated eccentric visual stimulation

Early event‐related potential (ERP) hemispheric asymmetries recorded at occipitoparietal sites are usually observed following the sudden onset of a lateral peripheral stimulus. This is usually reflected in an onset‐locked larger N1 over the posterior contralateral hemisphere relative to the ipsilateral hemisphere, an early ERP asymmetry labeled N1pc. When the peripheral sudden onset is followed by a central stimulus, or by a bilaterally balanced visual array of stimuli, these events evoke a reversed N1pc, that is, a larger N1 over the hemisphere ipsilateral to the peripheral sudden onset. This N1pc reversal has been taken as evidence for a remapping of the visual space from an absolute, retinally based frame of reference to a relative, attentionally based frame of reference that codes the spatial positions of objects relative to the peripheral sudden onset, rather than relative to the fovea. Here, we pit the reference frame‐remapping account against an alternative account based on reduced neural reactivity following the peripheral sudden onset. In three experiments, we varied the spatial location of an object relative to a preceding sudden onset, and tested the opposite predictions generated by the frame‐remapping and the reduced neural reactivity accounts. Taken together, the results from the present experiments were consistent with the reduced neural reactivity account and inconsistent with the frame‐remapping account.     

基于Box-Behnken设计-响应面法优化蜜麦麸的制备工艺

目的采用Box-Behnken响应面法优化蜜麦麸的制备工艺。方法根据《浙江省中药炮制规范》(2015版)中蜜麦麸制备方法,通过单因素试验筛选影响蜜麦麸制备工艺的关键因素,以麸皮与炼蜜比例、加热温度、加热时间为考察因素,蜜麦麸含水量、堆积密度和色度及阿魏酸含量的总评归一值作为综合指标,利用Box-Behnken设计-响应面法优选蜜麦麸制备工艺,并进行预测分析及工艺验证。结果蜜麦麸最刘制备工艺为麸皮与炼蜜比例为10∶3,加热温度为90℃,加热时间为90 s;含水量、堆积密度、色度、阿魏酸含量均符合蜜麦麸要求,综合指标平均值为0.676 0,与预测值(0.692 7)相对误差为2.41%,相对误差较小。结论优选的制备工艺稳定可靠,且简单可行,适用于蜜麦麸的制备应用。     

我国实验用豚鼠面神经核的立体定位坐标值

目的：确定我国实验用豚鼠面神经核（ＦＮ）中心的立体定位坐标值．方法：Ｎｉｓｓｌ染色、ＨＲＰ逆行追踪方法及立体定位仪确定ＦＮ立体定位坐标值;利用Ｎｉｓｓｌ染色在连续切片上确定豚鼠面神经核的外径．结果：体重３００ｇ～６５０ｇ豚鼠的ＦＮ中心坐标值为Ｐ：（２．４±０．１）ｍｍ,ＬＬ／ＲＬ：（２．０±０．０７）ｍｍ,Ｈ：（－１．９±０．０８）ｍｍ;ＦＮ的前后径：（１．５±０．０９）ｍｍ,左右径：（１．３±０．０７）ｍｍ,上下径：（１．４±０．０６）ｍｍ结论：确定了我国实验用豚鼠ＦＮ的立体定位坐标值,为面神经的研究提供了便利条件．     

妇科腹腔镜手术的护理配合体会

目的：探讨妇科腹腔镜手术护理配合的经验方法.方法： 回顾性分析手术室收治的妇科腹腔镜手术患者的临床资料,进行总结和分析.结果： 妇科腹腔镜手术具有创伤小、痛苦轻、疗程短等优点,熟练地手术护理配合技巧能保证手术顺利进行,患者满意率高.结论： 妇科腹腔镜手术护理配合不仅能增加手术的安全性,并能减轻了医护工作强度.     

苍白球腹后内侧部毁损治疗帕金森病靶点定位研究

目的　探讨MRI定位微电极引导的苍白球腹后内侧部毁损术治疗帕金森病靶点定位方法及其规律。方法　 39例原发PD病人施行PVP术 ,UPDRS评分改善率大于 35 %。采用MRI进行靶点解剖定位 ,同时在MRI操作台上测量有关参数。术中用电生理方法对靶点做必要的调整。结果　MRI具有较高的分辨率 ,对靶点定位具有直接、准确等优点 ,Gpi靶点坐标在不同的个体有很大差异 ;靶点坐标X与三脑室宽度 (W )和AC -PC线长度 (L)之间存在线性依从关系 ,即 :^X =10 .0 9 0 .30L 0 .4 8W。 结论　PVP术治疗帕金森病效果满意 :通过MRI扫描 ,实现了Gpi靶点解剖定位个体化 ,提高了定位精度 ;应用电生理学方法调整靶点是必要的 ,并实现了靶点的功能定位 ;靶点X坐标值与三脑室宽度和AC -PC线长度有相关性     

慢性胃炎舌像与胃粘膜像的定量关系

目的:探讨慢性胃炎的舌像与胃粘膜像之间的定量关系.方法:应用概率统计分析的方法和色度学原理,在计算机图像处理系统的支持下,对106例慢性胃炎患者的舌像与胃粘膜像色度之间的变化规律进行定量分析.结果:提出"充血指数"(m)的概念,并给出相应的数学模型.结果表明,浅表性胃炎与糜烂性胃炎的线性回归方程均在0.001水平上差异显著(P<0.01),而萎缩性胃炎的线性回归方程在0.002水平上差异显著(P<0.01).结论:根据舌像变化及所给出的数学模型,可以定量地预测慢性胃炎的充血程度,并以此作为判定病情轻重程度的参考指征.