针对M/PH/1(k)排队系统推导出该排队系统在任意时刻、到达时刻、退去时刻的队列长度状态概率分布、平均队列长度、以及平均等待时间，并编写程序进行数值计算，并对M/E2/1(k), M/M/1(k), M/H2/1(k)排队系统的性能进行数值比较。-against M/PH/1 (k) queuing system derived the queuing system at any time, the arrival time, faded moment of the queue length

层合板的刚度的计算和验算，包括拉伸刚度A、弯曲刚度D以及耦合刚度B。 首先要给定层合板的各个参数，具体有：层合板的层数N；各单层的弹性常数E1、E2、 、G12；各单层对应的厚度；各单层对应的主方向夹角 。(The stiffness of laminated plates is calculated and checked, including tensile stiffness, A, flexural stiffness, D and coupling stiffness B.

PV module with dc-dc converter files

The External Force matrix, F, contains the magnitude of all externally % applied loads, (input as e1, e2, e3 components), stored in the % proper rows to corespond with the node it is applied at.