查询词典 Model

In order to clearly understand the dynamics mechanism about broad-leaved Korean pine forest and simulate its dynamics mechanically, a simulation model is demanded through which we can simulate the long-term dynamics of BKPF under different pine cones picking intensity and hunting for grey squirrels in different intervals. By considering the effective dispersal of seeds by animals, the human disturbance and the masting behavior of Korean pine, a new gap model integrated seed-bank and regeneration dynamic model, based on the classical gap model, is established.

为了能够充分理解阔叶红松林的动态机制，准确模拟东北阔叶红松林的动态变化，探索出既能够保护好又能够利用好阔叶红松林的新途径，根据阔叶红松林的动态机制，在经典林隙模型的基础上，添加考虑了阔叶红松松林中动物对种子的有效传播、人工采摘干扰以及红松的结实特性，建立了红松种子库及其更新的动念模型更新子模型，使模型更能够反映阔叶红松林中的动态机制。

According to Meese's exchange rate model in 1986, in this paper, we modified Meese's (1986) model and suppose the Interest Rate Parity is untenable, the risk premium factor and real exchange rate parameter are considered, and the Purchasing Power parity doesn't follow random walk, we derive our modified equilibrium model. Base on the State Space Model, we try to estimate bubbles and risk premium which are unobservable variables by Kalman Filter to test which one is or both are the main factors that to cause the real assets price biased from the market fundamental price.

本文是以Meese(1986)所决定的汇率模型为基础，但Messe一文并未讨论到风险溢酬的问题，故本文为了克服此一缺憾，而假设未抛捕的利率平价说(uncovered interest parity，UIP)不成立，以加入风险溢酬因子，且更进一步假设偏离购买力平价理论(purchasing power parity，PPP)不服从随机漫步，若如此则顺利将实质汇率变数纳入於模型中，重新建立均衡汇率模型，为了验证本文所创立的模型，实证方法以状态空间模型为基础，运用卡门滤波器递回法来估计不可观察的变数，以观察台湾的外汇市场上是因泡沫现象还是风险溢酬造成资产价格偏离市场基要价值或是两者皆是造成实际资产价格偏离市场机要价格的因素。

A special field equation with of Faddeev model is solved. The analytical solutions with time variable of Faddeev model are obtained by utilizing the result that the SO (3) Faddeev model is equivalent to the mesonic sector of SU (2) Skyrme model where baryon number current vanishes everywhere.

对Faddeev模型的一种特殊情况的场方程进行了求解，同时采用SO(3)Faddeev模型等效于SU(2)Skyrme模型的重子数为零的介子区域的结果，得到了此种情况下Faddeev模型的一类精确含时解析解。

Distribution ratios of complex extraction for different operation conditions were forecasted. Using mass action law, the liquid-liquid equilibrium models of complex extraction of monobasic and polybasic carboxylic acid have been successfully induced, and physical extraction were also considered in the model. On the basis of orthogonal experiments, the models of equilibrium distribution ratios were established. The processes of complex extraction were tested and verified. Comparing experimental data with model values, it could be held that the regression precision of model was rather high and the model supplied fundamental data for industrial amplification and practical use of complex extraction.

采用质量作用定律分析方法，成功地推导了同时考虑物理萃取的一元及多元羧酸络合萃取通用液-液平衡数学模型，并在正交试验基础上建立了磷酸三丁酯络合萃取丁酸、三烷基胺（7301）萃取丁酸、丁二酸、柠檬酸的平衡分配系数模型，从平衡角度对络合萃取过程进行了验证与预测，通过实验数据与模型计算值比较，表明模型的拟合精度较好，从而为络合萃取技术的工业放大与实际应用提供了重要依据。

Then the author reviews the content of risk analysis of regional natural disasters and the mathematical models of risk assessment. The risk analysis is classified into three steps, risk recognition , risk estimation, and risk assessment and the mathematical models into three types, extreme risk model, probability risk model and possibility risk model. Nextly, the possibility risk model for analyzing regional disaster risk are reviewed thoroughly.

综述了区域灾害风险分析的内容及区域灾害风险估算的数学模型，指出风险分析可归结为风险辨识、风险估算、风险评价三个环节，风险估算数学模型的演进可概括为极值风险模型、概率风险模型、可能性风险模型三个阶段，着重介绍区域自然灾害风险分析的可能性风险模型。

Aiming at a class of complex electromechanical systems, such as 4-high or multi-high cold mills and continual mills, we firstly construct mathematical models of every subsystems by means of structural principle modeling method; nextly, get the overall mathematical model of electromechanical drive system by joining together these subsystems'models according to coupling variables and parameters; we finally simplify the overall model according to time-scale principle which can retain main eigenvalues and significant state variables, and obtain a practical mathematical model of complex electromechanical system. By simulating the CM04 temper mill's model constructed by above-mentioned method, we test and verify that the modeling method is effective and practical. The study analyzes and researches the electromechanical coupling facts and acting laws existing in complex electromechanical system.

提出了系统的总体测试方案，设计了高保真度的信号隔离和缓冲器，解决了从大功率、大电流复杂机电系统主回路中提取真实谐波分量、而又能不影响系统正常运行的难题；发现了谐波电流对平整机工作状态的影响规律；确认谐波电流是可能引起平整机工况奇异、产生机电耦合振动、导致带材产品表面出现明暗振纹的一个因素；提出了一种多相整流电路谐波电流的分析计算方法，用该方法对平整机三相桥式整流供电电路的谐波分量进行了理论分析和计算，计算结果与实测结果能得到相互验证，说明该方法是可行的，实测结果是可靠的。

FLAC~(3D) is for the analysis of the Lagrange explicit finite difference procedure for the timely steps to solve the dynamic relaxation, for when the difference method based on the show, less memory, faster solution. This paper discusses the usage of model FLAC create certainty and mixed model approach and to a dam seepage stability analysis as the research object, the establishment of a certainty piezometric level model, and further establish hybrid model, and the permeability coefficient for inversion analysis.

本文探讨了利用FLAC建立确定性模型和混合模型的方法，并以某土坝渗流稳定分析为研究对象，建立了测压管水位的确定性模型，进一步建立混合模型。

The idea of the model is that the existing model can not be used to the problem which is polycentric clearly. The polycentric distance model made the expansion model more general.

将单一中心区域的空间扩展模型扩充到多中心区域的情形，并给出了参数的估计方法。

Based on the pseudobinary method and solute aggregation model of aqueous solution, a pseudobinary solute aggregation model for correlating the viscosity of water-organic solvent-salt solution is established. The model has been tested for ternary aqueous solutions saturated or unsaturated with salt. The average relative deviation is about 1.0%. The results are better than the pseudobinary local composition model presented early by authors.

结合水溶液粘度的溶质聚集模型和拟二元方法，作者提出了一个适用于水-有机溶剂-盐三元溶液粘度关联的拟二元溶质聚集模型，能够成功地应用于以盐饱和与不饱和水溶液粘度的关联，平均相对偏差约1.0%，比作者早先提出的拟二元局部组成模型(平均相对偏差为2～5%)有较大的改善。

The critical nitrogen content in heading period was used to calculate the biggest accumulation quantity of nitrogen. The latent distribution index of leaf and stem, which was the variety heredity parameter, were used to distinguish the difference in nitrogen assignment in different varieties. The dynamic content of the nitrogen accumulation before anthesis could be described with a Richards model. The dynamic content of the nitrogen remobilization in leaf with leaf area index could be described with a power model, and the nitrogen absorption of grain from soil with dry weight could be described with a power model. The dynamic content of nitrogen density in stem and spike with physiological development time could be described with a nonlinear model.

模型利用抽穗期植株临界含氮量来表达氮素最大积累量，引入叶片潜在分配指数和茎鞘潜在分配指数2个品种遗传参数来区别不同品种在器官间的氮素分配差异，采用Richards方程来描述大麦花前氮素积累动态变化；采用指数函数方程来描述叶片氮的转移量随叶面积指数的动态变化以及籽粒从土壤中吸收的氮量随干物重的动态变化；采用非线性函数方程描述茎鞘和穗部的氮浓度随生理发育时间的动态变化。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。