查询词典 mathematical model

The function of the addition of co-substrate ethanol was to in-situ regenerate NADH. A mathematical model was derived, in which, two substrates were catalytically reacted in sequence. The model was applied to the system involving the reduction of 2'-chloroacetophenone to R-2'-chloro-1-phenyl-ethanol by S.

深入研究了在乙醇存在下生物还原过程中酵母细胞内NADH、NAD〓、NADPH及NADP〓浓度的变化规律，发现胞内NADPH浓度迅速降低到零，而NADH浓度始终维持在较高水平，证明了用于底物还原反应的辅酶是NADH，辅助底物乙醇的加入有利于实现辅酶Ⅰ的原位再生。

For confirming the method's efficiency, the turn-off transient mathematical model based on the chopper circuit is developed according to the proposed mathematic model of the turn-off transient current through IGCT, in which the RC-snubbers of IGCT, the stray inductance of chopper circuit and DC-link choke are taken into accounts.

该文建立基于斩波电路的IGCT关断暂态特性的数学模型。该模型充分考虑IGCT阻容吸收回路、线路杂散电感及限流电抗器对IGCT关断暂态过电压的影响。

Based on Chen's model about axial flow induced vibration of a rod bundle in an unbounded domain, a mathematical model concemed with circular domain is presented, and the expressions for fluid forces are given in detail.

三、基于Chen关于无界域轴向流动中棒束流致振动的模型，推导了有界域棒束轴向流致振动的数学模型，得到了关于流体力的表达式。

At first, a model for selecting optimal parameter v in v-SVM is presented in this paper, which bases on mathematical programming with equilibrium constraints. The model is a nonlinear problem which has smoothed objective function and with complementary constrains.

首先本文给出了一种基于平衡约束规划的v-支持向量机中参数选取模型，该模型是一个具有光滑目标函数的且带有互补约束的非线性规划问题，通过求解该问题得到v-SVM中泛化性能较好的参数v，并进行了数值实验，证明了该方法的有效性。

This paper focuses on the node stability of eco\|industrial symbiosis system from the view of environmental economics, and set up the Node Symbiotic Economics Model on the enterprises of eco\|industrial symbiosis system by analyzing relationship on the pollutants recycle of the inter\|node interconnected enterprises. Through the observation of the supply change in the enterprise′s recycling contaminants at the node based on the mathematical solutions to the model, the effects of outside disturbances on the balance of supply and demand has been studied. If the elasticity of the product price is equal to or less than 1, the node can achieve conditional stability and if the elasticity of the product price is more than 1, the node will fluctuate periodically around a stable point, and even chaos can appear.

从环境经济学角度出发，以生态产业共生系统的节点稳定性为研究内容，通过节点间相互关联的企业之间的污染物循环利用的关系分析，建立生态产业共生系统中企业之间的节点间污染物循环利用共生经济学模型，在市场经济条件下，基于模型的数学解，通过观察节点处对污染物进行循环利用企业受市场经济影响导致的产品供给变化，研究系统外界市场经济扰动对节点污染物循环利用的供需平衡的影响。

They are theory base of physical model and mathematical model.Secondly, we should start with Navier-Stokes equation and equation of continuity.

首先，通过丁坝回流理论和回流计算公式的探讨，分析丁坝回流产生的原因以及回流强度的影响因素，为物理模型和数学模型的建立提供理论基础。

According to continuity principle of flow, law of conservation of mass and Darcy's law, the dual medium mathematical model of unsteady flow in fissurekarst artesian aquifer is established, and the finite volume method is adopted to get the solution, taking Longgang district in Shenzhen as an example to verify this model.

根据水流连续性原理、质量守衡和达西定律，建立了裂隙-岩溶承压含水层非稳定流双重介质数学模型，采用有限体积法对其求解，并以深圳龙岗区为例对模型进行验证。

Through analyzing the existent methods for solving the intersection point coordinate of straight line and highway curve ,combined with the general mathematical model for highway curve ,a general solution model for the intersection point coordinate is given.

通过对现有的直线与线路曲线交点坐标解算方法的分析，结合线路曲线的统一数学模型，给出了直线与线路曲线交点坐标的统一解算模型。

The core problem of load forecasting is technical matters or the mathematical model. Conventional model is described by clear mathematic representation, which has the advantages of little calculation and high speed, but which has lots of limitations such as non-self learning, and non-self adapting at the same time.

传统的数学模型是用显示的数学表达式加以描述，具有计算量小、速度快的优点，但同时也存在很多的缺陷和局限性，比如不具备自学习、自适应能力、预测系统的鲁棒性没有保障等。

In this paper, a three-dimensional multi-level hydrodynamic model with curvature correction in curvilinear coordinates has been developed based on the update turbulent theory and numerical method, which can effectively solve the practical problems of flows and water quality transportations in hydraulic engineering, and can strengthen the practical usage of the mathematical model.

本文基于现代紊流理论、现代数值计算方法建立适合描述水利工程中紊流规律的非线性数值模型，即曲线坐标系下的多层紊流水动力模型，旨在提高紊流精细模拟的实用性，以求有效地解决水利工程中的水流和输运现象的实际问题。

I want to be a big fish in a small pond.

我要做一条在小池塘里的大鱼。

While the software functioned well, we did not feel the same about their customer support!

虽然该软件运行良好，我们没有同样的感觉他们的客户支持！