查询词典 Heaviside

After created by Gibbs and Heaviside, modern vector theory is applied to branches of physics and mathematics, especially electromagnetics.

吉布斯和亥维赛的向量理论创立后，随着物理学和数学的进一步发展，物理学家和应用数学家开始大量地把向量语言用在物理学和数学的各个分支。

Structural topology optimization is formulated in terms of the nodal variables on the level set function , which is converted to 0-1 variables by Heaviside function regularized by the sigmoid function.

利用有限元离散后的水平集函数的节点值作为拓扑设计变量来求解连续体拓扑优化问题。

A radial basis function with polynomials interpolation method and a Heaviside step function are chosen for establishing local Petrov-Galerkin formulations of hyperelasticity.

提出了求解超弹性材料静力学、动力学、静态接触和动态碰撞等问题的局部Petrov-Galerkin方程。

The energy which drives the evolution of a curve is constructed based on local image information,the alignment term enhances the speed of curve evolution,and the improved data fitting term which is based on the competition between of the shifted Heaviside functions,makes the curve converge to a better global stationary minimum.

该算法基于图像局部化信息创建驱动曲线演化的能量，引入的配准项提高了曲线的演化速度，基于曲线演化竞争的数据拟合项，使得曲线能更稳定地收敛到一个全局静态最小值，且算法对水平集函数初始化位置不敏感。

American electrical engineer who concurrently with Oliver Heaviside predicted the existence of the ionosphere.

肯涅利，阿瑟·埃德温1861－1939美国电子工程师，他与奥利佛·海维塞同时预言过电离层的存在

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。