稀疏

This thesis discusses firstly the IGMP, describes the specification of the protocol and explains the differences between the three different versions of protocol. Then the RPF rule used by the router to forward multicast packets and the multicast forwarding tree are discussed. The process of building SPT and RPT is also illustrated. In this thesis, we also discuss the mechanism of Flooding and Pruning in Dense-Mode multicast routing protocol and the process of switch from RPT to SPT in Sparse-Mode routing protocol.

本论文讨论了实现IP组播的IGMP协议，对IGMP协议的协议规范进行了描述，并对IGMP三个版本的不同点作了详细说明；讨论了进行组播数据包进行转发的RPF基本原理、组播转发树的类型，并对SPT树和RPT树的建立过程进行了探讨；并分别对密集模式组播路由协议的扩散和剪枝机制、稀疏模式组播路由协议中的RPT树到SPT树的切换过程进行了详细的探讨。

Finally, a thrust estimator design was applied to validate the effectiveness and feasibility of the proposed feature selection algorithm and sparse model using QR decomposition.

最后，推力估计器设计的应用实例，验证了本文提出的特征选择法和QR分解法进行稀疏性建模的可行性和实用性。

Measurement of sparse scatter particulates based on computer vision.

基于计算机视觉的微观稀疏离散粒子尺寸的检测。

The vibration s cause alternating compressions and rarefactions in the particles of the medium.

振动造成介质的粒子压缩和稀疏交替。

The vibrations cause alternating compressions and rarefactions in the particles of the medium.

振动造成介质的粒子压缩和稀疏交替。

At the same time, haemostasis 1 g by adding glucose after the intravenous infusion of 250 ml release sparse, 2~3 times daily.

同时并用止血敏1g加入葡萄糖250ml稀疏释后静滴，每日2~3次。

The restaurant's owner, Mac Alexander, is a big, barrel-chested man in his early sixties, with thinning gray hair, a mustache, and a slight squint behind his glasses that gives him a pensive, professorial air.

亚历山大，是一个胸肌发达的大个子，60岁出头，头发稀疏花白，蓄着胡子，而且他的眼睛总是在眼镜底下微微斜视着你，所以他看起来像一个喜欢深思的教授。

But at a recent rally in Santa Marta, on Colombia's Caribbean coast, Mr Mockus, a former mayor of Bogotá who is the candidate of a newly formed Green Party, arrived in a bulletproof SUV.

他紧跟着活动管理人员组成的安保小分队，从一个城市辗转另一个城市，号召稀疏的观众支持他。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。