耕整机产品特点及使用

介绍耕整机产品特点和结构型式，并对其技术发展进行了预测。简要分析了耕整机工作状态及作业方式。     

极坐标系和椭圆坐标系下薛定谔方程及其解的研究

给出极坐标系和椭圆坐标系下薛定谔方程的表达式后,分别在这两种坐标下对特定的薛定谔方程进行求解,然后利用计算机模拟功能,得出了电子的基态能量和概率密度分布。最后对其结果进行了分析。     

三终端多臂量子环中的持续电流

本文提出了三终端多臂量子环模型,并采用特殊方法来计算持续电流,研究发现：总磁通为零时,持续电流随半导体环增大做非周期和不等幅的振荡.总磁通不为零时,持续电流随AB磁通增强做周期性等幅振荡,Rashba自旋轨道耦合具有改变两种持续电流位相和位相差的效应. 平均持续电流的大小与各臂的臂长和所处的位置以及磁通分布相关.AB磁通对两种持续电流具有不同影响,两种持续电流是可分离的.     

Persistent spin currents in a triple-terminal quantum ring with three arms

A new model of a triple-terminal quantum ring with three arms is proposed.We develop an equivalent method for reducing the triple-terminal quantum ring to the double-terminal quantum ring and calculate the persistent spin currents in this model.The results indicate that the persistent spin currents show behavior of nonperiodic and unequal amplitude oscillation with increasing semiconductor ring size when the total magnetic flux is zero. However,when the total magnetic flux is non-zero,the persistent spin currents make periodic equal amplitude oscillations with increasing AB magnetic flux intensity.At the same time,the two kinds of spin state persistent spin currents have the same frequency and amplitude but the inverse phase.In addition,the Rashba spin-orbit interaction affects the phase and the phase difference of the persistent spin currents.The average persistent spin currents relate to the arm length and the terminal position as well as the distribution of the magnetic flux in each arm.Furthermore, our results indicate that the AB magnetic flux has different influences on the two kinds of spin state electrons.     

11吋双作用离合器产品设计

对大功率轮式拖拉机离合器结构进行优化设计，使产品性能优越，可靠性增强，提高了轮式拖拉机的综合利用率和生产率。