查询词典 derived function

The modified basic price of land can be used to express the land price level of residential site. After then, the author used linear function to set up a derived demand model of residential site, and got the influence factors of the interurban residential site price differences.

笔者收集了十个省市和三个直辖市共计96个城市的住宅用地一级基准地价，依据基准地价内涵对样本数据进行了修正；并结合我国城市地价水平分布状况，可以认为城市住宅用地一级基准地价可以用来衡量一个城市住宅用地价格水平。

Objective To evaluate the function and long-term surviving of intracerebrally transplanted neural stem cells （NSCs-D-BMSCs） derived from bone marrow stromal cells and modified by TH gene on monkeys with hemi-parkinsonism.

目的评价外源性酪氨酸羟化酶和增强型绿色荧光蛋白基因修饰的骨髓基质细胞源神经干细胞（BMSCs-D-NSCs）在猴帕金森病模型脑内移植后长期存活情况及其功能评定。

In this method, an interim variable is defined by combining one variable of each subsystem. The interim variable is used to construct the sliding-mode function and the total control law can be derived to guarantee the equilibrium point is reachable in finite time. Using LaSalle invariance theorem, it can be proved further that the equilibrium field only includes one equilibrium point and the equilibrium point is asymptotically stable.

该方法将各个子系统的一个变量进行组合定义成一个中间变量，然后从这个中间变量出发构造滑模函数，通过求取总的控制量保证中间变量在有限时间内收敛到平衡点；进一步利用LaSalle不变性原理证明该收敛域内只有一个平衡点且是渐近稳定的。

The one order differential model and convolutional model of impedance formula of amplitude versus offset inversion were established. Impedance inversion formula from AVO was derived based on Bayesian framework. Methods of using Huber function as prior model parameter distribution and covariance matrix from well log as constrains were developed. The P-wave impedance, S-wave impedance and density were calculated by the conjugate gradient algorithm.

为此建立了振幅随偏移距变化波阻抗反演公式的一阶差分模型及褶积模型，推导了基于贝叶斯理论的AVO波阻抗反演公式，给出了采用Huber分布作为模型参数的先验分布及测井数据的参数协方差矩阵作为约束条件的实现方法，并利用共轭梯度法计算了纵、横波阻抗及密度。

Based on the internal model of Jitterbug and its certain scheduling attributes with the quadratic cost function for a class of networked control system, we have derived the delay requirements of real-time closed loop control system and proceeded with analysis of delay compensation.

本文基于Jitterbug 内部模块特性，利用其特定的调度策略和性能指标函数，针对一类网络控制系统，导出了该实时闭环控制系统的性能优化时延需求，并进行了时延补偿分析。

Two models for the identification of Wiener-type nonlinear systems, which are the combination of Laguerre function model with static neural networks, are presented, and the identification algorithm are derived respectively.

提出了基于Laguerre函数模型与参数化模型构成的组合模型预测控制策略，解决了线性不稳定系统的基于Laguerre函数模型的自适应预测控制问题。

The methods are as follows: the first is for Hammerstein-type nonlinear system model with known upper value of its order; the second is for the nonlinear system model based on the nonlinear Laguerre model derived from the Volterra series input-output presentation, and the third is for the Wiener-type nonlinear system model based on the combination of Laguerre function with neural networks.

给出了三类非线性系统的即时线性化自适应预测控制策略，即(1)已知非线性子系统阶次上限值的Hammerstein型非线性系统；(2)基于Volterra-Laguerre函数模型的非线性系统；(3)基于Laguerre函数与神经网络的组合模型的Wiener型非线性系统。

This thesis mainly discuss following issues, Theory and simple expressions for array covariance matrixes are derived when angular spread functions are symmetric distribution functions, i. e. the Uniform distribution, the Gauss distribution, the Laplace distribution and the Von Mises distribution, and a non-symmetric distribution function, i. e. the Gamma distribution. And the relation between the effective signal subspace and the array number, or and the nominal angle of the distributed source, the angular spread, the distributed functions, and the Signal-to-Noise Ratio is gained. The dimension of the effective signal subspace increases with increment of the array number. And it is more obvious to the non-symmetric distribution. The dimension of the effective signal subspace decreases with increment of the nominal angle. And the distributed source is equal to a point source as θ=π/2. The dimension of the effective signal subspace increases with increment of the angular spread.

本论文针对阵列信号处理中广泛存在的分布源现象，主要讨论了以下问题：推导了角度分布函数分别为对称的均匀分布、高斯分布、拉普拉斯分布、Von Mises分布和非对称的伽马分布时，分布源阵列接收信号协方差阵的严格模型和简化模型，得到了单个分布源的有效信号子空间随阵元数、分布源中心角、分布角、角度分布函数和信噪比的变化规律：随着阵元数的增加，对所有角度分布函数的有效信号子空间维数也随着增加，且非对称分布函数的有效信号子空间充满整个空间的可能性更大；随着分布源中心角逐步增加，有效信号子空间维数逐步减小，当θ=π/2时，等价于点源情形；随着分布源分布角逐渐加大，有效信号子空间维数也随之增加，直到有效信号子空间充满整个空间；随着信噪比的增加，有效信号子空间维数有一定程度的减少。

This paper is concerned with combinatorial identities which can be derived by using Mbiusinversion and lattice function in the poset R_.

给出格路集R＿的定义和其上的一种偏序关系；利用格路函数的性质计算出该偏序集的Mbius函数，从而建立其上的Mbius反演和一系列多元组合恒等式，使一些卷积公式成为其特例

By using Mawhin\'s continuous theorem and liapunov function, sufficient conditions for the existence and globally asymptotic stability of positive periodic solutions of three systems are derived, respectively.

我们还利用Mawhin连续性定理分别建立了两个系统正周期解存在的充分条件。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。