Active contour model, also called snakes, is a framework in computer vision introduced by Michael Kass, Andrew Witkin, and Demetri Terzopoulos [1] for delineating an object outline from a possibly noisy 2D image.

2017年9月1日 · Canine parvovirus type 2 (CPV-2) was selected as a model because it represents a well characterized case of host jump, originating from Feline panleukopenia virus (FPV). The current study demonstrates that the adaptation to specific tissue and host codon bias affected CPV-2 evolution.

2017年3月31日 · CPV is a non-enveloped DNA virus with an approximately 5000-nucleotide, single-stranded DNA genome containing two open reading frames (ORFs). The first ORF encodes two non-structural proteins, NS1 and NS2. The second …

The active contours technique, also called snakes, is an iterative region-growing image segmentation algorithm. Using the active contour algorithm, you specify initial curves on an image and then use the activecontour function to evolve the curves towards object boundaries.

cpv mlv 疫苗的特点是免疫起效早 (ooi) 和免疫持续时间长 (doi)。 一些研究表明，接种 mlv 疫苗的狗早在接种后 3 天就可以抵御强毒 cpv 的攻击。 自然 cpv 感染后的 doi 被认为是终生的，但有证据表明即使在 cpv 疫苗接种后仍存在长期 doi。

A snake is an energy-minimizing spline guided by external constraint forces and influenced by image forces that pull it toward features such as lines and edges. Snakes are active contour models: they lock onto nearby edges, localizing them accurately. Scale-space continuation can be used to enlarge the capture region surrounding a feature.

2022年2月9日 · 中国和美国研究团队通过五年多合作，首次解析了家蚕质型多角体病毒（BmCPV）刺突蛋白（spike蛋白）的高分辨率三维结构。 相关研究于1月27日发表在《自然–通讯》杂志。 Spike蛋白是广泛存在于病毒囊膜或衣壳表面的同源三聚体，通常在病毒入侵宿主细胞的过程中发挥关键的作用。 相较于囊膜病毒，无囊膜病毒spike蛋白之间的同源性较低、蛋白质结构差异大，且缺少相关病毒spike蛋白不同构象下的高分辨率三维结构，使得大多数无囊膜病毒 …

2017年9月1日 · Canine parvovirus type 2 (CPV-2) was selected as a model because it represents a well characterized case of host jump, originating from Feline panleukopenia virus (FPV). The current study demonstrates that the adaptation to specific tissue and host codon bias affected CPV-2 evolution.

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Code for "Deep Snake for Real-Time Instance Segmentation" CVPR 2020 oral - zju3dv/snake