取对数后的价格;价格对数 网上有一个例句: based on bibby and s?rensen's hyperbolic diffusion model(hyd),we model the log price as a determin**tic linear trend and jumps plus a diffusion process with drift zero and with a diffusion coefficient(volatility)which depends in a particular way on the instantaneous asset price. 以bibby与sφrensen(1997)抛物线扩散模型为基础,用一个线性趋势和跳跃加上一个扩散过程为资产价格对数建模,该扩散过程是一个漂移项为0、扩散系数依赖与瞬时的资产价格,该模型称之为抛物线跳跃扩散模型. 如果是有关木材生意的,也可以指的是“圆木价格”