Conclusions A rat C6 brain-glioma model resembles histopathological features of human glioblastoma,which can be used as a perfect model to study the etiology of glioma.

The results of perfect model,consistent mode imperfections method,advanced stochastic imperfections method and experiment are compared,by which some conclusions that are useful for engineering design and study of space sheet structure are obtained.

During the process of control, pendulum can effectively reflect many pivotal problems such as equanimity,robust, follow-up and track, so it is a perfect model used to testing various control theories.

Due to its big volume and being operated easily , the bacterial flagellar motor has become a perfect model for the research of revolving molecular motor , which conduces to understanding the mechanism of biologic energy transform and cell movement.

All the work above breaks through the strict confinements of the perfect model following conditions, so that zero steady following errors are ensured for plant's outputs or other key state variables to corresponding those of reference model or to system inputs.

Based on the criteria,a standard and general design method is studied in detail. Finally,it is proved that the reference models out of the method not only satisfy the perfect model following conditions,but also is controllable.

One is called the perfect model, by which the tectonic block motion on the earth surface could be described if regarding the tectonic block as a rigid body and approximating the earth to a ball.

It is shown that the former is more evident than the latter, and after no modeling uncertainty is eliminated, a more perfect model can be acquired with modern identification method.

That is, taking perfect model semantics and stable model semantic as an example, any logic program P can be transformed in polynomial time to another logic program P' such that perfect models (resp.

In this paper, it is shown that stable model semantics, perfect model semantics, and partial stable model semantics of disjunctive logic programs have the same expressive power with respect to the polynomial-time model-equivalent reduction.

In most neural network applications, it is impossible to suggest a perfect model, and consequently the ability to handle incomplete models is urgent.

In particular, the critical exponent of the surface magnetization is found to be close to that of the perfect model, Β1= 1/2.

Yet even a hypothetical perfect model, which exactly represented the dynamics of the real atmosphere, and which used data from the best conceivable observing system, could not produce an accurate forecast of indefinitely long range.

In this paper four model following approaches are used to design Hydraulic Velocity Flight Simulation Table with One Axis. In using real model-following approach to design this system we discuss the problem of how to introduce input into the synthesized regulator system. In this paper we use a configuration somewhat different from that in the references [1] [2] [3]. When calculations are made with the formulas derived from our new configuration, the results show that the configuration in this paper can bet-...

In this paper four model following approaches are used to design Hydraulic Velocity Flight Simulation Table with One Axis. In using real model-following approach to design this system we discuss the problem of how to introduce input into the synthesized regulator system. In this paper we use a configuration somewhat different from that in the references [1] [2] [3]. When calculations are made with the formulas derived from our new configuration, the results show that the configuration in this paper can bet- ter follow the model than that in the references. In order to obtain satisfactory closed-loop transient characteristics a new method is introduced for choosing the weight matrices Q for rea1 model- following and type-zero perfect model-following' The weight matrices of the quadratic performance criterion are chosen according to the following formulas: Q=[q_(11) q_(22) q_(nn)] q_(11)=b_1~2-a_1~2 q_(22)=b_2~2-a_2~2-2(b_1 b_3-a_1 a_3) ………… q_(11)=b_i~2-a_i~2+2∑_r(-1)~r(b_(i-r)b_(i+r)-a_(i-r)a_(i+r)) ………… q_(nn)=b_n~2-a_n~2-2(b_(n-1)-a_(n-1)) When the weight matrices are so chosen the systems obtained certainly possess satisfactory dynamic character. In this paper for all four approaches we derive formulas for our given problem and perform calculations on digital computer.

In this paper the duality principles of electrical circuits are extended to the switching converter topologies. The duality of transformers (ideal and perfect models) is investigated. In addition, the duality relationships of duty ratio parameters and semiconductor-switch topologies are also given. Applying these relationships, both the switching converter with (or without) isolated transformer and their canonical linearized circuit models can be directly and simply correlated by duality.

In this paper, some analyses had been done by combining theory with practice based on a case study of a village which is located in Xi-Hai-Gu region, the very well-known poor region in our country.Soil and water loscaused by improper land use as usually saying, but why people do not use their land properly even today? The analysshow that. firstly the key problem refers to the population capacity of environment in an area; secondly, the central link is man-land relaticnship in land use, from which the equation,...

In this paper, some analyses had been done by combining theory with practice based on a case study of a village which is located in Xi-Hai-Gu region, the very well-known poor region in our country.Soil and water loscaused by improper land use as usually saying, but why people do not use their land properly even today? The analysshow that. firstly the key problem refers to the population capacity of environment in an area; secondly, the central link is man-land relaticnship in land use, from which the equation, m_i=a_i×p_i can be summarized and it also predicates the population capacity of an area to be limited; and thirdly a perfect model of comprehensive controlling may be reached by two steps, the first is planting grasses, shrubs and trees and the second is controlling with engineering.