在二沉池模拟中，指数模型和双指数模型较为实用且应用较多。
The exponential model and double exponential model were the most practical and applied models for secondary clarifier simulation.
本文提出了一种对双指数荧光衰减进行拟合及分析的较简便的有效方法。
This paper presents a simple and effective method for fitting and analysis of the kinetic model of double exponential fluorescence decay.
这种耦合关系在其演化周期内呈现出双指数函数的变化规律，其耦合演化轨迹是一条双指数曲线；
This kind of coupling relation takes on a double-exponential function changing law, and the evolutive track of the interaction between urbanization and eco-environment is a double-exponential curve.
用参数可分离非线性最小二乘拟合方法，根据少量测量数据较准确地求得了太阳电池双指数数学模型。
Solar cell both exponent mathematical model can be obtained exactly using a few measurement data by the least squares fitting method that parameter can be separated.
文中根据四种典型情况，给出了如何合理地选取和修正各个衰减参量的规则，以迅速获得双指数衰减的最佳拟合。
According to four typical cases, we give the rules for selection and modification of decay parameters to get the best fit.
用一维FDTD方法模拟了双指数脉冲在单层岩土介质中的衰减，并对电磁波在岩土层中的穿透进行了详细的讨论。
By using one-dimension FDTD method we simulates the decay of double exponential pulse through the soil media, and its refractive time-domain wave shape is discussed in detail.
首先利用非对称的LINEX损失函数对双指数分布族刻度参数进行了经验贝叶斯估计，并讨论了该估计的性质，给出了收敛速度。
First, we obtain the empirical Bayesian estimator of the scale parameter for the double exponential distribution based on LINEX loss function and the convergence rate of the estimate.
双精度数的指数的偏差是1023。
双精度数是以类似的方式编码的，但是它使用52位的尾数和11位的指数来获得更高的精度。
Doubles are encoded in much the same way except that they use a 52-bit mantissa and an 11-bit exponent for higher precision.
双参数指数分布是可靠性工程中重要的分布之一，对其研究有一定的理论意义和实用价值。
Two-parameter exponential distribution is an important distribution in reliability engineering. It is studied because it is useful in theory and in practice.
结果表明，应用子模型技术估算三维双材料结构的应力奇异性指数是有效的。
It is shown that FEM sub-modeling technique is valid for estimating the index of stress singularity for three-dimensional bi-material structure.
本文讨论了股票价格服从指数O-U过程的幂型支付的双标的欧式混合期权的定价问题。
The pricing problem which bivariate European mixed options of the power payoffs on stocks driven by exponential O-U process is discussed in this paper.
对于轴向阶梯载荷下圆柱壳的非轴对称动力屈曲，将临界应力和屈曲惯性指数作为双特征参数求解。
Critical stress and inertial exponent are treated as two characteristic parameters for the asymmetric dynamic buckling of cylindrical shells under axial step loading.
本文以C 30为例，分析了粉煤灰双掺混凝土和普通混凝土耐久性指数，论证了粉煤灰双掺混凝土工程应用的可行性。
Taking C30 concrete for example, analysis the durability index of common concrete and co-dope concrete, and proved the engineering application feasibility of fly ash for co-dope concrete.
本文对双曲-抛物偏微分方程奇异摄动问题构造了一个指数型拟合差分格式。
In this paper we constructed an exponentially fitted difference scheme for singular perturbation problem of hyperbolic-parabolic partial differential equation.
分析了每个双饼及每匝线圈的指数损耗。
The index loss of every double-pancake coil and every single turn was calculated.
文中分析了三种抑制噪声的方法，相关双采样法、双斜积分法、开关指数滤波法。
Signal processing schemes described in this paper are double correlated sampling, dual slope integration and switched exponential filtering.
在次极量仰卧运动中测量最大心率、心率血压双乘积、最大运动耐量指数。
Maximal heart rate (MHR), double product of maximal heart rate and systolic blood pressure, and maximal endurance index (MEI) were measured during submaximal supine bicycle exercise.
目的探讨双时相~（18）F-FDG PET显像图像、标准摄取值（SUV）及储留指数（RI%）在恶性肿瘤诊断中的价值。
Objective To study the value of dual-phase ~(18)F -FDG PET imaging, standardized uptake value(SUV) and retention index(RI%) in the diagnosis of malignancy.
对指数分布下的双截尾数据和分段数据，给出了其参数矩估计的一种新的方法。
A new method of moment parameter estimation parameter is given by double side censored data and interval data in the exponential distribution.
现有三类不同的临界速度模型，包括双参数双曲线模型、三参数双曲线模型或三参数指数模型。
There are three different CV models that including the two-parameter hyperbolic model, the three-parameter hyperbolic model and the three-parameter exponential model.
自同步振动机的稳定性指数W，当振动机为空间单质体和空间双质体时其表达式分别为式（21）及式（54）。
The stability factors W of a self-synchronous vibrating machine, in space motion, are given by formula(21)and (54) as working with single mass and dual mass respectively.
治疗组经治疗后双侧大脑前、中、后动脉平均血流速度及搏动指数均有明显改善，与对照组比较差异有显著性(P ？ 0.05)。
Treatment group after therapy, bilateral before, during and after the brain artery blood pulsing index and average will be improved obviously, compared with the control group (p? 0. 05).
结果二甲双胍治疗前后比较，血清睾酮、空腹胰岛素水平下降，胰岛素敏感性指数上升（P <0 0 1）。
Results A significant decrease in levels of the serum testerone and fasting insulin were observed after treatment. Insulin sensitivity was significantly increased( P< 0 01).
通过增加双时成像中第二帧扫描时间，可提高保留指数的可靠性和判别准确率。
The longer duration in the second frame of the dual scan increase the RI reliability and improve the diagnostic accuracy.
作为应用，给出了双曲线、双曲正弦曲线与指数曲线的UAHB 样条精确表示。
As an application, hyperbolic curves, hyperbolic sine curves and exponentcurves are explicitly expressed by the 3-order and 4-order UAH B-splines.
双端金属卤化物灯显色指数更高，适用于商场、舞台、橱窗、办公场所。
Double-ended Metal Halide Lamps are used for shopping mall, stage, show window and office because of high Ra.
目的探讨正常双胎妊娠期间胎儿大脑中动脉搏动指数的变化；
Objective (1)To study the change of fetal middle cerebral artery pulsatility index(PIMCA) in twin pregnancy;
目的探讨正常双胎妊娠期间胎儿大脑中动脉搏动指数的变化；
Objective (1)To study the change of fetal middle cerebral artery pulsatility index(PIMCA) in twin pregnancy;
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