时标定时

Generally, The gauge reading demarcated in the laboratory is increasing arithmetic progression,so we can use null method that we intercalate sequential numbers in order to calculate simply. The sum of these sequential numbers are zero. We must intercalate different sequential numbers while the number of trials is odd or even.

因为在试验室标定时，压力表读数一般是按照等差数列递增的，所以为了计算的简便，可用"零点法"设置等差序号，使这一列数据的总和为零，此时要注意当试验次数分别为偶数和奇数时不同地设置等差序号的方法。

The sampling rate is set up by DSP on-chip high speed counter ,and two 322bit high speed counter s and the counter-controlled electric circuit are constit uted by the external CPLD.

采用 DSP 锁相环技术，将外部输入时钟频率提高5倍，作为时标信号；通过 DSP 片上高速定时器完成采样速率设定功能；利用外部 CPLD 构成两个 32 位高速计数器和计数器开闭控制电路。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。