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Image segmentation directly determines the performance of automatic screening technique. However, there are overlapping nuclei in nuclei images. It raises a challenge to nuclei segmentation. To solve the problem, a segmentation method of overlapping cervical nuclei based on the identification is proposed. This method consists of three stages: classifier training, recognition and fine segmentation. In the classifier training, feature selection and classifier selection are used to obtain a classifier with high recognition rate. In the recognition, the outputs of the rough segmentation are classified and processed according to their labels. In the fine segmentation, the severely overlapping nuclei are further segmented based on the prior knowledge provided by the recognition. Experiments show that this method can accurately segment overlapping nuclei. 相似文献
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为了有效地提高车轴校平机的校平效率,采用IBM-PC586微机远程监控和PLCFX2-32MR现场测控的分布式控制模式,研制了一种高自动化的校平机控制系统,经运行证明,系统在保证较高的控制精度同时,有很强的抗干扰能力。 相似文献
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以特种麦芽为原料,分别采用3株实验室保藏无醇酿酒酵母(Y272、Y273、Y274)和商业对照无醇酿酒酵母酿造无醇啤酒,比较不同酵母的发酵性能及所酿啤酒的理化指标;采用顶空固相微萃取(HS-SPME)和气相色谱质谱联用(GC-MS)法检测所酿啤酒中挥发性化合物组成和含量的差异;通过气味活度值(OAV)确定风味化合物并对酿造的啤酒进行感官评价。结果表明,3株实验室保藏酵母和商业对照无醇啤酒酵母基本不利用麦芽糖、异麦芽糖和麦芽三糖,表观发酵度低(16.89%~17.61%),产生的酒精度低(0.43%vol~0.52%vol)。综合发酵性能及风味分析,酵母Y273起始发酵速度快,可发酵性糖利用率为18.55%,所酿啤酒酒精度为0.48%vol,表观发酵度为17.21%,pH为4.76;啤酒中风味物质多样,醇酯比例为2.64,感官评价风味协调,比较适合酿造无醇啤酒。 相似文献
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本文通过围岩分类因素对围岩类别及爆破地震传播影响的内在关系进行分析,在对城市地下工程现场围岩分类及爆破地震量测的基础上。首次建立了围岩分类与爆破地震之间的定量关系,为爆破地震灾害的预测和爆破设计提供了更切实可行的数据。 相似文献