指数函数 meaning in Chinese
exponeneial function
exponentialfunktion exponential function
quantity in the exponent
Examples
- The useful life curves of gan - based blue led with al2o3 and sic substrate is fit single exponential function [ i = i1 + i2exp ( - t / ) ] . fron this function , we could get aging information of led about stable inteneity 1 , decay intensity i2 and decay time . the novel method of evaluating aging properties of leds was put forward
用单指数函数拟合了发光二极管的光衰减曲线[ i = i _ 1 + i _ 2exp ( t / ) ] ，这个关系式可以给出三个信息：稳定光强、衰减光强、衰减速度，提出了更加合理的评价led老化性能的方法。 - 4 . dicussing soil pressure ( supposed as p ) and level displacement ( supposed as s ) in condition that consideration time performance , the relation is p = ae , when the defomation of wall has evidently effect on the soil pressure . 5 . the deformation of wall ( supposed as sw ) leads to soil layer sedimentation ( supposed as pw ) , the research find pw = 1 . 22sw 6 . the artifical neural networks has vast and applied foreground in the information construcion of deep foundation excluding the accidental factor
4 、探讨了考虑时间效应的土压力和位移关系曲线，认为在当墙体的变形对土压力分布产生明显影响时，二者间的关系可用一指数函数来表达： p = ae ~ ( ( / s ) ) 5 、墙体侧向变形，导致墙后土体产生沉降，在本次研究中，排除掉基坑降水施工因素的影响，由墙体变形导致的墙后土体沉降，二者具有p _ w = 1 . 22s _ w关系； 6 、将基于时间窗口滚动多步神经网络预测方法和应用于深基坑工程墙体变形的预测工作，具有较高的预测精度，该方法在岩土工程变形预测方法中具有广泛的应用前景。 - Based on the fem program on fracture of plane structure developed by professor fu xiaoling of ho hai university , a two demension damage and fracture finite program package which is programed in fortran 90 language is developed . the paper adopts the plane - eight - nodes isoparameters element and compute the developing law of the damage and macro - damage of plane structure under load . considering the original damage and tension and compression damage at the same time , the paper adopts the more reasonable concrete constitute relation of two demension and exponent function model
在河海大学符晓陵副教授所编制的平面结构断裂有限元程序（ dl08p4 ）基础之上，本文用fortran90语言编制的二维损伤-断裂有限元程序包，程序采用平面八结点等参数单元分析计算平面结构在外荷载作用下损伤及宏观裂缝的发展规律，考虑了混凝土结构体内存在着初始损伤和同时存在的拉、压损伤，并且采用更为合理的具有损伤含义的混凝土二维本构关系（即正交异性损伤模型中的本构方程）和指数函数模型建立的并可进行拉、压损伤可比性换算的损伤演变方程，较为真实地反映了实际情况。 - Based on the spectral irradiance measured with the sun - atmosphere ultraviolet spectrum radiometer ( sauvs ) developed by the institute of atmosphere physics and the changchun institute of optics and fine mechanics , chinese academy of sciences , measuring the direct and scatter irradiance spectrum of ultraviolet waveband which arrives in beijing global surface , giving a method of retrieving the aerosol optical depth ( aod ) and put up with primary results that exponential function can fit the retrieval results according to its visibility , putting forth different coefficients and functions on variable visibility , also giving a primary analysis on the aod in dust - storm day and some contrast between sun - day and dust - storm day , analyzing the ratio between scatter and total irradiance , and its relationship with atmosphere mass and total atmosphere optical depth , lastly contrasting with the survey results by aeronet beijing station , the results of retrieval is in reason , this work gives some help in researching the co - effect of aerosol - radiance - climate and makes preparation for further survey on the radiance characteristics of dust
利用中国科学院大气物理研究所与长春光学精密机械研究所合作研制的太阳?大气紫外光谱辐射计( sauvs ) ，测量到达北京地表的太阳直接和散射紫外光谱辐射，导出了大气气溶胶的光学厚度。初步结果表明：北京紫外波段大气气溶胶的光学厚度在绝大部分情况下随波长的增加而单调减小，用指数函数可以较好地拟合反演结果，统计得到了三个水平能见度状况下拟合函数的系数值和公式表达式；初步分析了扬沙、浮尘、沙尘暴天气条件下气溶胶光学厚度的特点，并与一般晴朗天气条件下的气溶胶光学厚度特点做了比较分析；分析了太阳紫外谱辐射中散射辐射与大气质量、大气总光学厚度的定性关系和定量表达式；最后与全球气溶胶监测网络( aeronet )北京站的资料做比对，表明反演结果基本合理。 - In the paper , static and dynamic triaxial tests were conducted on fiy ash at shanmenxia longgou ash dam , and the static and dynamic parameters of fly ash were obtained . thirdly the 2 dimensions static analysis of the ash dam was conducted based on biot ' s consolidation theory and duncan ' s nonlinear stress - strain model . finally the plane dynamic behaviors of the ash dam during earthquake of intensity 7 were analyzed based on the exponent function model of excess pore water pressure aroused by earthquake , which is put forward in the paper , and equivalent visco - elastic dynamic fem model and principle of effective stress
本文结合实际工程，对三门峡火电厂龙沟灰坝的筑坝粉煤灰进行了静、动三轴试验，确定了该坝粉煤灰的静动力学指标；然后根据比奥( biot )固结有效应力原理，采用邓肯( duncan )非线性应力应变模型，对该灰坝的二维静力应力和变形状态进行了分析；最后利用本文提出的地震超静孔压指数函数模型，采用等价粘弹性动力有限元方法，对该灰坝在地震作用下的动力稳定性进行了分析评述。