中文摘要：

变丑参数(DP ) 它被定义为产品砍变丑和潮湿流动循环的拉长的变丑，被介绍。DP 的趋势方程在压力坐标被导出。而且， DP 被用来在 Bilis 的圆周诊断潮湿流动循环的变丑特性。分析证明在 Bilis 登陆了以前， DP 介绍了八个反常区域，它或者散布了并且仔细环绕了低压的中心。这显示在 Bilis 的圆周的潮湿流动发行量逆时针方向旋转了并且拉长了纵并且纬度地使变形。在 Bilis 登陆了以后， DP 逐渐地变弱，它水平分发的常规模式松开了。在台风登陆了以后， shear 和包围 Bilis 的潮湿流动循环的拉长的变丑变弱。在 Bilis 的圆周的潮湿流动循环的变丑主要出现在中间降低的对流层。在垂直纬度的生气的节的 shear 和拉长的变丑之间的在那里存在的 1/2 阶段差别和水平飞机上的他们之间的 /4 阶段差别。作为打的 Bilis 和中国的进一步的移动内陆， DP 的紧张，砍并且拉长变丑减少了，同时，他们的垂直、水平的结构变得不规则。为在 Bilis 的圆周的潮湿流动循环的变丑负责的主要动态因素是与 DP 的三维的移流交通联系的三个术语，之间的方形的差别砍并且拉长在 Bilis 前结合 geopotential 高度的 Coriolis 参数，和水平坡度的变丑登陆了。二个动态因素在 Bilis 以后在潮湿流动循环的变丑上联合影响了的最后登陆了。

英文摘要：

The deformation parameter （DP）, which is defined as the product of shear deformation and stretching deformation of moisture flux circulation, is introduced. The tendency equation of DP is derived in pressure coordinates. Furthermore, DP is used to diagnose the deformation character of moisture flux circulation in the periphery of Bilis. The analysis showed that before Bilis landed, DP presented eight abnormal areas, which distributed alternately and closely encircled the low-pressure center. This indicated that the moisture flux circulation in the periphery of Bills rotated counterclockwise and stretched longitudinally and latitudinally to deform. After Bilis landed, DP weakened gradually and its regular pattern of horizontal distribution loosened. The shear and stretching deformations of moisture flux circulation surrounding Bilis weakened after the typhoon landed. The deformation of moisture flux circulation in the periphery of Bilis mainly appeared in the middle-lower troposphere. There existed 1/2 phase difference between the shear and stretching deformations in the vertical-latitudinal cross section and a π/4 phase difference between them on the horizontal plane. As Bilis landed and further moved inland of China, the intensities of DP, shear and stretching deformations decreased, meanwhile their vertical and horizontal structures became irregular. The chief dynamic factors responsible for the deformation of moisture flux circulation in the periphery of Bilis were the three terms associated with the three-dimensional advection transportation of DP, square difference between shear and stretching deformations coupling with Coriolis parameter, and horizontal gradient of geopotential height before Bilis landed. The last two dynamic factors impacted jointly on the deformation of moisture flux circulation after Bilis landed.