科学计算，加、减、乘、除、开方、平方、三次方、三角函数(sincos tan)、阶乘、求反、取模等。
Scientific calculator supporting addition, subtraction, multiplication, division, square-root, square, cube, sin, cos, tan, Factorial, inverse, modulus.
本文介绍了一种利用慢度曲面判断三方晶系晶体纯模轴的方法。
A method of obtaining the pure mode direction of the trigonal system by the slowness surfaces is introduced.
入口截面不消耗剪切功率，然后用上界定理与曲面积分方法首次得到了用余弦模拉拔方棒时变形力的解析解。
Then with the upper-bound theorem and the surface integral an analytical solution of the drawing stress was first obtained.
另一方面，同步在采用“模-数-模”方法实现的模拟信号置乱加密通信中非常重要，必须在信息信号中加同步头信号。
On the other side, synchronization in "analog-digital-analog" scramble communications is very important, and the synchronizing signal must be inserted into information signals.
这一方法已较好地应用于构造新一代注塑模设计制造系统中。
The method has been used in a new generation of injection mold design and manufacturing system.
新的谢尔顿在任一方面，会比旧的谢尔顿好吗？不会，还是一模一样的。
Would the new Sheldon be in any way an improvement on the old Sheldon? No, he would be exactly the same.
文中给出了滑动模均方稳定的充分条件，所设计的变结构控制律能够保证滑动模具有可达性。
The sufficient conditions of sliding mode mean stability are given, and the variable structure control law can guarantee the sliding mode to have reachability.
并从提高模具强度和使用寿命的角度，提出了方锥形件整形凹模的合理设计方案。
A reasonable design of the sizing matrix was proposed with the view of improving the die strength and extending its service life.
使用DDS- 70微机控制电磁式振动三轴仪，对三种尾矿砂试样进行了动强度、动本构关系、动弹模阻尼比三方面动力特性研究。
DDS-70 electromagnet kinetic equipment was used to study the dynamic strength, stress-strain relationship, dynamic modulus and damping ratio of three tailing sand types.
使用DDS- 70微机控制电磁式振动三轴仪，对三种尾矿砂试样进行了动强度、动本构关系、动弹模阻尼比三方面动力特性研究。
DDS-70 electromagnet kinetic equipment was used to study the dynamic strength, stress-strain relationship, dynamic modulus and damping ratio of three tailing sand types.
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