- 时变
- 随时间变化
- 随时间而变的变化
- time: n. 1.时，时间，时日，岁月。 2.时候，时刻；期间； ...
- variation: n. 1.变化，变动。 2.变量，变度，偏差。 3.【语 ...
- time variation: 变化性; 季节性变化; 随时间变化; 随时间的变化
- variation with time: 随时间变化
- short-time climatic variation: 短期气候变化
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time-variation中文什么意思
- 时变
- 随时间变化
- 随时间而变的变化
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例句与用法
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- The transverse stiffness limitation index ? the permissible ultimate width / span ratio b / l of the continuous steel truss girder of railway bridge is analyzed in accordance with the analytic theories of random vibration of train ? bridge time - variation system and the required derailment coefficients and comfort of drivers and passengers in train running through the bridge . the limitation index in question may be referred to in the design of the continuous steel truss girders of railway bridges
基于列车-桥梁时变系统随机振动分析理论，按照桥上列车脱轨安全系数和司机、旅客舒适度的要求，对铁路连续钢桁梁桥横向刚度限值-桥梁容许极限宽跨比b / l进行了分析，对铁路连续钢桁梁桥的设计具有一定的参考作用。 - But in analyzing the dynamic characteristics of rolling mill , we find that the system exists nonlinear uncertainty and slow time - variation , which are caused by nonlinear mode and random disturbance . this leads to the approximation of the practical system of the model and parameter and it is difficult to construct the accurate mathematical model . therefore , the routine controlling method is n ' t used any longer
然而，在分析轧机的动态特性中发现，由于位置内环的模型中存在非线性元件，系统受到过多外界扰动的影响致使系统中存在非线性、不确定因素及慢时变参数的现象，推导出的模型结构和参数只是实际系统的一个粗糟近似，难以建立精确的数学模型，此时，常规控制方法已不再适用。 - Because return of chinese security market is non - normal distribution , so we use garch - t model which can describe the time - variation of volatility and the high - peaked and heavy - tailed characteristics of return to calculate var value of market index . from empirical results we know that this model is efficient
考虑到中国证券市场收益率序列分布的非正态性，本文使用了既能描述方差时变性又能反映收益率分布的尖峰、厚尾特征的garch - t模型计算市场指数的var值，实证结果表明该模型是有效的。 - According to the characterestic of resistance furnace temperature control , temperature rising one - way control , large time delay and time - variation of parameter , using method of fuzzy compositional rule of inference establish fuzzy model and design fuzzy cntroler . in order to increase control system precision , it gives a fuzzy variable k , and sets parameter self - adjusting fuzzy control system . this system can on line self - adjusting controller parameters according to the error and variations of the error . it makes the system steady precision improved
根据电阻炉温控制的特点，即只有升温单向控制、滞后较大且具有参数时变性，利用模糊推理合成法建立模糊模型并进行模糊控制器设计，为提高模糊控制的精度，引入模糊变量k ，构成参数自调整模糊控制系统.该系统可根据误差和误差变化在线自动调整控制器参数，使系统的稳态精度得到改善 - In this paper , based on the characteristics of force and deformation of pars , the time - variation of the elastic coefficient of fulcrum in the calculation model of pars is analyzed and studied ; and the lessening of rigidity coefficient of elastic fulcrum , which is caused by the continual bottom soil resilience beside the piles and the increase of excavation depths during different steps , is discussed
摘要根据桩锚支护结构的受力和变形特点，研究分析了桩锚支护结构计算模型中支点弹性刚度系数的动态时变性；讨论了随桩内侧坑底土的持续反弹以及不同工况下随著基坑开挖深度的逐渐增大，进而导致弹性支撑刚度系数的减小的变化规律。