查询词典 model theory

The paper introduced the basic concept and theory of model analysis and structure dynamic analysis;performed the model analysis of the whole framework of hydraulic pressure and calculated the first ten-rank inherency frequency and corresponding vibratory-type;analyzed and estimated the first three-rank inherency frequency and corresponding vibratory-type of hydraulic pressure.

对液压机的整体机架进行有限元模态分析，得到了机架的前十阶固有频率和相应的固有振型，并对前三阶固有频率和振型进行了详尽的分析和评价。

Finally, apply the model to the wave calculation of a project area in northern Jiangsu Province. The results indicate the favorable inosculation with theoretical and practical values. The distribution of wave field is reasonable and basically unanimous with the results of adopting other models on wave calculation, which has proved the correctness of this model in theory and the practicability on engineering.

最后将模型应用于苏北某地的工程区域的波浪计算，计算得到的波浪场分布合理，波浪要素数值上与采用其他波浪模型所得的结果基本一致，说明了本文所建立的模型和计算方法在理论上是正确的，在工程上实用。

The paper introduces an improved harmonic and reactive current detecting method based on there-phase reactive current using instantaneous reactive power theory. By using matlab, simulation model is built, and the results show that this model can exactly detect harmonic and reactive current in time and it is feasible in DSP system.

本文在三相瞬时无功功率理论的基础提出了一种改进的单相无功电流检测算法，并建立了仿真模型，仿真结果表明：该算法可以及时、准确地检测出三相电路中的谐波电流和无功电流，同时也验证了此算法在DSP系统中的可行性。

Based on the compensate admittance model of Steinmetz theory a method is put forward which use instantaneous values of load current and voltage to denote it. The simulations and practical application in the design of SVC model have shown that the proposed method is very effective, accurate, and with fast response performance.

本文基于不平衡负荷的平衡化原理(即Steinmetz原理)的补偿导纳模型，采用负荷电流电压瞬时值采样的方法补偿无功功率，并将该方法应用于SVC样机的设计，结果表明，它们是快速有效和准确的，具有实际的工程应用价值。

In this paper,ecology theory was used to investigate the structure and evolution of interagency information sharing system of E-Government,and both structure model and evolution model for this system were proposed.

本文运用生态学的理论和方法，考察了电子政府部门间信息共享系统的结构和进化方式，提出了电子政府部门间信息共享生态系统的结构模型和进化模型。

In order to investigate the variation of controllability and observability affected by network scheduling,the model of scheduling for Networked Control System is established,which has communication constraint on its input and output channel.Utilizing communication sequence to express the scheduling of channel,the model can be transformed into discrete-time switch system.Under static scheduling,using the theory of recursive invariant subspace and its character,a necessary and sufficient condition of NC...

为了研究网络调度对能控性与能观性的影响，对输入、输出通道都存在通信约束的网络控制系统的调度进行建模；利用通信序列表示通道的调度情况，最终将模型转化为离散切换系统；在静态调度下，利用循环不变子空间理论及其相关的性质，给出了网络控制系统能控性、能观性成立的充要条件，并给出了原有控制系统与经网络静态调度后的系统之间能控性、能观性的关系；最后用仿真实例说明了所提结论的正确性。

ABSTRACT A robust control system design method via model reference and inverse system theory is presented in this paper,and compared with the model reference adaptive approach and the inverse system design method.

摘 要 给出了一种基于模型参考最优化方法和逆系统设计方法的鲁棒控制系统设计方法，并将其同模型参考自适应方法和逆系统方法进行了比较。

After that, the model is validated safety and reliable by using the State Matrix Equation of the Petri network. According to the theory that the State Topological Map of Petri Network and Markov chain are isomorphous, the Markov chain of the model is deduced, by which some function indexes such as marked density of probability, average token-number, and usage of transformation can be calculated.

同时，本文运用Petri网系统的状态矩阵方程的方法对模型进行了可达性验证，经验证该模型是安全可达的，并根据随机Petri网的状态图同构马尔可夫链的原理，获得该模型的马尔可夫链，运用该MC链分析了模型的标记概率密度、位置中的平均标记数以及变迁的利用率等性能指标。

According to the Similarity Theory, plaster model is applied to model rockmasses materials with isotropy.

试验依据相似理论，用石膏模型模拟各向同性的岩体材料。

The simulation results by applying zero-equation model are compared with those by adopting Prandtl mixing length theory and K-ε two equation model.

研究表明，总体来说Prandtl的混合长度理论能够获得比Chen的零方程模型更好的结果；从这两种零方程模型的构造分析，Prandtl混合长度理论较为合理，但Chen的零方程模型更容易收敛。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。