JUNIPER NS-1K0-SW1 NETSCREEN 1000 SWITCH FDDI 6 - PORT TX / RX MODULE (USED)隶属度函数可以选取多种形式,视具体指标性质而定。根据本研究的指标情况,取隶属度函数为线性函数形式之间。2.2.2层次权重定的群组AHP法AHP应用于机械系统总体性能的评价,个很关键的问题就是要计算各评价指标相总体性能的指标权重,就是各评价指标总体性能优劣影响程度进行量化。指标权重值是通过在单则下构造两两比较判断矩阵而得到。
所有专给出的判断矩阵进行性检验,剔除那些不满足性检验的矩阵。设有A2,…,Am共m个矩阵通过性检验,各矩阵的权向量:(wlk,W2k,…,Wimk)T,k=l,2,…,m在可能的情况下再m个专的可依赖程度填写判断矩阵A设其大特征值Xmax所应的归化特并进行组合性检验。若能通过组合性检验,即可取(W 2,…,Wim)T作为排序权向量。工控机通讯功能工控机配有串行异步通讯端口(COM端口地址为3f8H,CM2端口地址为2f8H),接口板上的通用异步接收/发送器(UART),是片8250或片结构、编程方法与8250相同的芯片,内部有0个寄存器。PC机串行通讯程序设计,程序员只要应用输入/输出命令UART内的寄存器进行输入/输出操作,从而设定串行通讯的波特率、数据传送格式、是否允许中断、发送或接收数据等。
2.3―种新的多机通讯方法在常规的多机通讯方法中,奇偶校验位已用作发送地址码(通道号)或数据的特征位,而数据通信的校核则采用累加和校验方法。采用这种方法不但软件开销和进行通信的数据量增加了,而且实时性也受到影2.3.通信的基本原理上位机发送数据给下位机,下位机要产生接收中断必须同时符合两个条件。
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