This equipment can test the emitters " hydraulic performance , which includes the relationship between pressure and flow rate , the impact on flow rate by water temperature , manufacturer ' s coefficient of variation of emitters . it also can test the emitters " anti - clogging ability , which comprises physical clogging and chemical clogging 该装置既能测定灌水器的水力性能(包括流量压力关系、水温对流量的影响、灌水器制造偏差等) ，又能测定灌水器的抗堵塞性能(包括物理堵塞和化学堵塞) 。
Actually correction coefficient of kinetic energy reflects the non - uniform characteristics of cross - sectional velocity in natural rivers . it is related with hydraulic parameters and can be expressed by chezy ' s coefficient . the larger the resistance of boundary , the more non - uniform the distribution of cross - sectional velocity 动能修正系数实际上反映了河道横断面流速分布的不均匀性，与断面的水力要素有关，可用谢才系数c来表示，水流所受的阻力越大，边界对其影响也就越大，流速分布愈不均匀，导致动能修正系数增大。
Firstly , wall ’ s transfer matrix is deduced by laplace transformation based on 3r2c thermal network model . secondly , frequency response of transfer matrix is calculated . thirdly , we make the frequency response of transfer matrix of stimulation model equate the theoretical frequency response of wall transient heat conduction by applying appropriate identification algorithm , from which we can obtain every polynomial ’ s coefficient of model transfer function , then each parameter of resistance and capacitance is calculated by appropriate optimization algorithm 首先,根据仿真热流网络模型用拉普拉斯变换推出墙体的传递矩阵;然后,计算传递矩阵的频率响应;最后,采用频域回归方法求出模型传递函数各次项的系数,进而通过一定的优化算法确定模型的各个热阻、热容参数,使通过模型建立的多项式s -传递函数与墙体瞬时传热的理论超越s -传递函数完全等价。
