标量积协议是构造隐私保持决策树的关键技术。
Scalar Product Protocol is the keystone in building privacy-preserving decision tree.
但现在我要产生的，功率是力和速度，间的标量积。
But now the power that I have to generate is the dot product between the force and the velocity.
同时与简单的标量积协议的性能相比较，协议4.1的性能是在合理的范围之内。
And comparing with the performance of simple Scalar Product Protocol without privacy preserving, the performance of Protocol 4.1 is acceptable.
在传统的决策树算法中引入标量积协议，既保持决策树算法本身的优点，又满足了保持隐私的需求。
A decision tree classifier was applied and a scalar product protocol was added, so that the need of privacy preserving is satisfied as well as the advantage of decision tree is retained.
点积是三个标量的乘积，所以是个标量。
The dot product, being the product of three scalars, is a scalar.
因为标量与坐标系无关，故两个矢量的点积称为标量不变量。
Formulae on the base vectors and the coordinate variables derivative going with fluid particle and their application;
因为标量与坐标系无关，故两个矢量的点积称为标量不变量。
Formulae on the base vectors and the coordinate variables derivative going with fluid particle and their application;
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