solvability of a second-order implicit differential equation

1、

nominal size of hexagonal kelly

六方钻杆公称尺寸

互联网摘选

2、

a novel high performance variable-frequency speed control circuit for ultrasonic motor

新型高性能超声波电机变频控制电路

互联网摘选

3、

the design of a high performance variable-speed permanent-magnet synchronous motor

一种高性能调速永磁同步电动机的设计

互联网摘选

4、

gto gating circuit by open cathode method

一种采用阴极开路技术的GTO门极驱动电路

互联网摘选

5、

a gaseous metal may just have been discovered

也许才被发现的一种气态金属

互联网摘选

6、

some problems on dynamics of unilateral constraint systems

关于单面约束系统动力学的某些问题

互联网摘选

7、

lie symmetries and conserved quantities of third-order linear nonholonomic systems with unilateral constraint in a phase space

相空间中具有三阶线性单面约束非完整系统的Lie对称性与守恒量

互联网摘选

8、

to overcome the problem, we present a system consisting of a finite thickness phononic crystal plate stubbed with uniform/ composite layer.

针对该问题，我们提出了在有限厚度的声子晶体表面堆垛均匀/复合附加层的结构。

互联网摘选

9、

the gap structure characteristics of 2-d phononic crystal were studied and the effect on the gaps by various materials and structure parameters was analyzed. 2.

探究了二维声子晶体带隙结构特性，并分析了各种材料和结构参数对带隙的影响。

互联网摘选

10、

defect states in three-component phononic crystal

三组元声子晶体中的缺陷态

互联网摘选

11、

optical properties of an ionic-type phononic crystal

离子型声子晶体的光学性质

互联网摘选

12、

phononic crystal can give rise to complete acoustic band gaps within which sound and vibrations are forbidden.

声子晶体能够产生完全的弹性波禁带，可以阻止声波或者振动在其内部传播。

互联网摘选

13、

the property of the phononic crystal may be useful for the impedance matching material and high-frequency acoustical filter.

声子晶体的这一特性可以应用于高性能的阻抗匹配材料和声波滤波器中。

互联网摘选

14、

the relation between scatterer's tropism and band gaps of 3d phononic crystal

三维声子晶体带隙与散射体取向的关系

互联网摘选

15、

band structure of phononic crystal constructed by fibonacci super-cell on square lattice

正方点阵上Fibonacci超元胞声子晶体的带结构

互联网摘选

16、

band structure calculations of two-dimensional phononic crystal with wide-sharp structural scatterers

并列型双组分纤维结构二维粗锐结构声子晶体带结构的计算

互联网摘选

17、

the gap characteristics of heterostructure in the 2-d phononic crystal have been studied.

我们对二维声子晶体异质结构带隙特性进行了研究。

互联网摘选

18、

the acoustic wave propagation in one dimension phononic crystal with defects was studied by eigen matrix method.

用特征矩阵法计算了声波在包含缺陷的一维声子晶体中的传播规律。

互联网摘选

19、

phononic crystal is a new functional material consisting of two or more elastic materials with periodic distributions.

声子晶体是由周期性分布的两种或两种以上材料组成的新型功能材料。

互联网摘选

20、

sonic waveguide characteristics of heterostructures line defect of in 2d phononic crystal

二维声子晶体异质线缺陷的声波导特性

互联网摘选