Genetic algorithm is utilized to optimize the leaf end shape to improve the size and uniformity of leaf-end penumbra.
使用遗传算法对叶片端面形状进行了优化设计,使端面产生的半影大小和一致性得以改善。
Firstly,we generated two depth buffers for occluder and receiver,discretizing the occluder to micro-patches;then,we calculated the depth value of shadow for each micro-patch and estimated the visibilities of them;finally,we computed penumbra extent for each micro-patch and projected soft shadow map on the scene to obtain real-time soft shadows.
首先为场景中遮挡物、接收面计算深度缓存,并离散遮挡物成许多微面;接着计算每个微面的阴影深度值,估计微面的可见度;最后计算微面半影范围,将软阴影图投影回场景中,得到实时软阴影。
According to the requirements of precision conformal dose delivery, the side focused and tongue-groove structure of multi-leaf collimator is determined, and genetic algorithm is utilized to optimize the leaf end shape, which results in the improvement of penumbra size and uniformity.
根据剂量精确适形的要求,确定了多叶组合光栅侧面的聚焦和榫槽结构,使用遗传算法对叶片端面形状进行了优化设计,使端面产生的半影大小和一致性得以改善。
The Effect of Blocker of Gap Junction on Penumbra Following Cerebral Ischemia;
缝隙连接阻断剂对局灶性脑缺血半影区的影响
Results The expression of IGF-Ⅰ was very low in normal tissues, while increased mainly in penumbra after cerebral ischemia.
结果:正常组织有极低水平的IGF- 表达,脑缺血后表达主要位于半影区,随缺血及缺血再灌注时间延长,半影区表达逐渐增强,IGF- 蛋白及m RNA表达在再灌注2 4 h为16 9。
Research of Fast Neutron Penumbral Imaging in Inertial Confinement Fusion;
惯性约束聚变中的快中子半影成像研究
