4～20GHz超宽带YIG调谐FET振荡器CAD计算和实验分析

简要介绍了采用双耦合ＹＩＧ谐振子的超宽带ＹＩＧ调谐ＦＥＴ振荡器的等效电路,并以阻抗圆图形式给出了ＣＡＤ优化设计的计算结果,稳定圆分析表明理论设计与实验结果一致。     

包含伪Smarandache函数与Euler函数的两个方程

利用初等方法以及伪Smarandache函数Z（n）和Euler函数p（n）的性质,讨论了两个数论函数方程φ（n）=Z（n＆k）与Z（n）＋φ（n）=2n的可解性问题,并求出所有正整数解．     

子样广义方差的分布函数及其计算

本文以傅氏级数为基础，巧妙地利用了契贝谢夫多项式，成功地给出了子样广义方差的分布函数及其计算过程。     

气流横掠错列螺旋槽管束的传热及阻力特性的实验研究

本文根据强化传热试验台上取得的试验数据,整理出气流横掠错列螺旋槽管束的传热及阻力特性公式,为进一步研究开发强化换热产品及工业应用提供了试验依据。     

基于改进欧拉公式的变电站雷电过电压计算

为准确计算变电站雷电侵入波过电压,提出了基于改进欧拉公式的数值求解法。通过分别采用基于改进欧拉公式的数值求解法和基于贝杰龙法的EMTP仿真法对变电站的雷电过电压进行计算、对比,结果表明二者计算结果很接近,验证了基于改进欧拉公式的数值求解法是可行的。而与基于贝杰龙法的EMTP仿真法相比,基于改进欧拉公式的数值求解法的建模和计算过程更精确,更能准确模拟变电站遭受雷击后设备上过电压发展的实际过程。     

一种解决遥控误动的有效措施

对调度自动化系统遥控误动问题产生的原因进行了深入的分析,通过提高遥控回路工作电压及串联大电阻来限流,提高了遥控时遥控支路的工作电压,从而大大减小了非遥控支路的干扰电压,即加强了有用信息,抑制了无用信息。实践证明,改进后的控制回路非常成功,遥控准确率及可靠率大幅度提高。     

Practical benefits for the separation process of drying that can be realized from novel multiscale modeling procedures that utilize the scientific information and results obtained from molecular dynamics modeling and simulation studies

Novel multiscale modeling procedures are constructed and presented that use the scientific information and results determined from microscopic molecular dynamics (MD) modeling and simulation studies to calculate local effective values for the parameters that characterize the heat and mass transfer mechanisms of dynamic macroscopic continuum models (Euler physics of continua) that are used in practice to describe and predict the dynamic behavior of large scale in time and space (e.g., industrial scale), separation (e.g., drying; adsorption), and chemical and biochemical reaction engineering (e.g., chemical catalysis; biocatalysis; immobilized cell bioreactor systems) processes involving porous media whose pore structure is formed either by a solid rigid matter or by a solid soft matter. Furthermore, the results determined from MD modeling and simulation studies with regard to the energies of interaction between the molecules of the different species of the porous media during the time evolution (time varying) of the drying process can be used to design a time optimally controlled heat input system that could appropriately and accurately supply at any time during drying the amount of heat necessary to provide a desired drying rate with respect to both free and bound water and to satisfy the constraints that safeguard the quality properties of the product.     

三维最大剪应力迹线上的正应力变化规律

利用坐标变换法证明了一般三维塑性流动问题任意点应力状态 ,可以完全由三维最大剪应力迹线上的信息确定 ,进而利用共斜面法给出了三维塑性流动问题沿最大剪应力迹线正应力的变化规律。该规律为求解三维问题的应力应变分布 ,提供了重要的基本方程