中文摘要：

为在液体估计粒子集中分发的一个方便 gamma 光线传播方法催化裂开(FCC ) 起床人被建议。方法基于实验关联 $\varepsilon (r)=\bar \varepsilon ^{(0.191 +\varphi 2.5 + 3 \varphi 11 )}$ ，它有一仅仅未知参数 $\bar \varepsilon $ ，因此仅仅一单个横梁的试验性的结果是足够的在起床人估计粒子集中分发。以便验证这个方法的可行性，实验室起床人的三张剖面图的粒子集中被测量，分发侧面与在文学报导的那些相比。由比较方法在起床人的测量使用了的另外的 gamma 光线功能，而且，这个方法有明显的优点，例如设备简单并且没有移动分开，测量是快速的，并且因为一根仅仅 gamma 光线横梁被使用，安全高。因此，方法在估计粒子集中或监视起床人的操作条件有有希望的应用。

英文摘要：

A handy gamma-ray transmission method for estimating the particle concentration distribution in a fluid catalytic cracking （FCC） riser is proposed. The method is based on an empirical correlation ε（r）= ε-（0.191＋φ25＋3φ11）, which has only one unknown parameter y, hence only one single-beam experimental result is enough to estimate the particle concentration distribution in the riser. In order to verify the feasibility of this method, the particle concentrations of three cross-sections of the laboratory riser were measured and the distribution profiles were compared with those reported in the literature. Furthermore, by comparing other gamma-ray function methods applied in the measurement of risers, this method has distinct advantages, such as the device is simple and has no moving parts, the measurement is rapid, and the safety is high because only one gamma-ray beam is used. Therefore, the method has promising applications in estimating particle concentrations or monitoring operation conditions of risers.