But it also has some problems, such as riding index of parameters and practicability of load model.
但是它也存在一些问题，如参数的平稳性和模型实用化问题。
As an example, the riding index of diesel locomotive type DF 9 is calculated and the results of linear and nonlinear models of the locomotive are compared.
本文以东风9内燃机车为例，分析了各种速度下的平稳性指数，并比较了线性模型和非线性模型的分析结果。
Riding quality is an important index of railway vehicle running behaviour.
运行平稳性是机车车辆的重要指标。
The riding quality index evaluating model is established according to field test result.
根据现场试验结果，建立了行驶舒适性指数评价模型。
The results show that predicted data of pavement condition index, riding quality index, structure strength index and British pendulum number is much better precision.
结果表明：路面状况指数、路面行驶质量指数、路面强度系数和路面抗滑摆值的预测数据有较高的精度。
The results show that predicted data of pavement condition index, riding quality index, structure strength index and British pendulum number is much better precision.
结果表明：路面状况指数、路面行驶质量指数、路面强度系数和路面抗滑摆值的预测数据有较高的精度。
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