查询词典 exponential function

The CO2 effluxes from the soil showed exponential responses to the air temperature with significant correlative coefficient (from 0.84~0.87 under different straw management, irrigation and nitrogen application strategies).

为探讨不同农作措施条件下的农田碳平衡规律，研究农田对大气CO_2的源汇特征，2000年至2003年用钠石灰碱吸收法连续测定不同秸秆还田、灌溉和氮肥施用等农作措施下京郊冬小麦—夏玉米轮作体系作物生长季的土壤呼吸。

Some global properties such as global at tractivity and global exponential stability for delayed Hopfield neural networks model, under the weaker assumptions on nonlinear activation functions, are conc erned.

对具有时滞的Hopfield神经网络模型，在非线性神经元激励函数是Lipschitz连续(而非已有的大部分文献中假设是Sigmoid函数)的条件下，通过构造适当的泛函，给出了这类模型全局吸引和平衡点全局指数稳定的易于验证的充分条件。

Two control methods have been studied for the control of TCP etchers; one is EWMA (Exponential Weighted Moving Average), the other one is LS. In EWMA controller, the control parameter is the etching power, while they were etching power, chamber pressure, and gas flow rate in the LS control.

在作法上，我设计了EWMA(Exponential Weighted Moving Average)及LS控制器来模拟与分析，由於EWMA模拟时会需要有一个目标模型，所以我另外以最小平方法和最佳化公式建立一个以腔体压力，功率，氯气流量为变数，蚀刻深度为输出的模型以供EWMA控制器模拟时使用。

In order to realize nano feeding under large feeding force, according to the research existing state of nano feeding device all over the world and development tendency of this technical in developed country, a nano precision feeding scheme based on thermal deformation is presented, the mathematic modal of nano drive parts based on metal thermal deformation is established and stepped exponential fitting method is presented which can determine the parameters of modal.

为了在较大的进给力下实现纳米级进给，根据国内外纳米级进给机构的现状及国外工业发达国家该技术发展趋势，本文提出一种基于热变形的纳米级进给控制方案，建立了基于金属变形体热变形的纳米级进给部件的数学模型，并提出了确定模型参数的方法——分段指数拟合方法。

The shear modulus and mass density of FUMs are assumed to be of exponential form and the Poisson's ratio is assumed to be constant.

假设裂纹突然受到均匀载荷作用，材料的剪切模量和密度为指数形式模型，泊松比为常数。

The reservoir pressure has an exponential correlation with cumulative production and gas wells can be divided into three types by gas-producing curves.

研究发现红台2块气田地层压力与累计产气量呈指数相关，根据采气曲线特征，可将气井分为相对稳产型、递减较快型和无稳产期型三种类型。

A new gauge control method for plate head was developed.For the plates of different steel grade and different dimensions,the plasticity coefficient is calculated, and gauge compensation for plate head is automatically adjusted.Adopting the exponential compensation curve,the gauge deviation is allowable after cropping, and metal yield can be improved.

在此基础上开发了一种新型头部厚度控制的方法，可以在不同钢种和不同规格的轧制条件下，利用轧制过程实际数据，进行轧件塑性系数计算，自动修正头部沉入量；采用指数型补偿曲线，使钢板切头之后成品厚度尺寸达标并且切头质量减少，提高了产品的成材率。

The 7th chapter introduces a class of mixtures of exponential distribution and proof they are heavy-tailed Pareto distributions.

第七章在流量建模及流量预测的基础上进行网络性能分析。

In this paper,on a basis of an exponential regression model for log-spacings we propose an extreme quantile estimator of heavy-tailed distribution and attain an estimation of value-at-risk.

本文中，我们基于指数回归模型构造了厚尾分布的极值分位数估计，从而得到了VaR的估计公式。

To recover the continuous phase distribution of all steps with the same height in a calibration gauge, and to adjust the fitted phase surfaces of three virtual calibration planes to their ideal positions relative to the reference plane, reversal exponential temporal phase unwrapping was adopted.

对于模块校准过程中虚拟平面的连续相位分布的恢复以及它们之间准确相对位置的恢复问题，采用了负指数序列的时间相位展开。

A backer of an Afghan law that critics say legalizes marital rape has rejected the international outcry as foreign meddling.

饱受批评的一项法律的拥护者说合法化的婚内暴力不会受国际舆论的干涉。

Years ago, a ancient Egyptian fleet went to the Land of punt for seeking a kind of flavor named "myrrh", and aromatic plants which has dense exotic style for the queen Hatshepsut.

3500年前的一个古埃及的舰队到&彭特之地&寻找一种叫没药的香料。