1) density barycenter
密度重心
1.
According to the image\'s feature to be fined,the veins of the image were fined to be of three pixel in width by using density barycenter and then the 4-neighborhood topology was computed to make complete thinning.
该算法根据被细化图像的特点,用密度重心快速将纹线细化到3个像素宽度内,计算4邻域拓扑实现彻底细化。
3) importance density
重要密度
1.
As the algorithm of particle weights, especially the importance density function, often severely affects the performance of the PF, we propose .
鉴于医学图像质量低、噪声大的普遍特点,从状态变量的非线性、非高斯分布前提出发,利用粒子滤波技术解决该类跟踪问题是一种具有挑战性的技术:由于经典粒子滤波器的权值计算,尤其是重要密度函数的构造方法严重影响了粒子滤波器的性能,本文提出了重要改进。
2.
We analyze the degeneracy phenomenon of sequential Monte Carlo particle filters based on bayesian theorem,put focus on the key techniques(good choice of importance density and use of resampling) to reduce its effects.
针对基于贝叶斯原理的序贯蒙特卡罗粒子滤波器出现退化现象的原因,以无敏粒子滤波(UPF)、辅助粒子滤波(ASIR)及采样重要再采样(SIR)等改进的粒子滤波算法为例,对消除该缺陷的关键技术(优化重要密度函数及再采样)进行了分析研究。
4) density reconstruction
密度重建
1.
Taking the French Test Object model as an example,the conjugate gradient algorithm is applied to the density reconstruction in high-energy x-ray radiography,and the result is satisfactory.
并以典型的法国试验客体模型为例,将共轭梯度算法应用到高能X光照相的密度重建中,得到了较满意的结果。
5) gravimetric density
重量密度
6) unit weight
重力密度
补充资料：非密度制约因素(见密度制约因素)
非密度制约因素(见密度制约因素)
l焦非密度制约因素见生态因素、密度制约后
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条