中文摘要：

用蒙特卡洛模拟方法研究了e^＋e^-对撞Z^0强子衰变事件中胶子喷注和夸克喷注的硬度特性．发现夸克喷注和胶子喷注的硬度特性存在较大的差异；不同味的夸克喷注的平均多重数、平均横动量和平均快度随硬度的分布特性也存在明显的差异，而不同味的夸克发射的胶子产生的喷注的硬度特性是一致的；胶子喷注与夸克喷注的平均横动量、平均多重数与硬度之间存在较强的正关联，而平均快度与硬度之间存在较强的负关联。

英文摘要：

With MC simulation methods we studied the hardness characters of quark-and gluon-jets in the 3-jet events in hadron Z^0 decay. It is found that there exists obvious difference on hardness characters between quark-and gluon-jets. The distribution of average multiplicity, average transverse momentum and average rapidity as functions of hardness of quark-jets in different avors has notable difference, while that of gluon-jets is the same; there exist strong positive relevancy between the average transverse momentum, average multiplicity and hardness in gluon-jets and quark-jets; while the strong relevancy between average rapidity and hardness is negative.