Then the high order model was reduced by the modal aggregation method 采用模態(tài)集結(jié)法對其高階模型進(jìn)行降階。
In chapter 5, according to the characteristic in the stage of concept evaluation of product design, the quality attribute preference aggregate model which support multi-attribute and group decision is set forth . according to the model, preference aggregation method based on evidential reasoning and rough set theory and rational evaluation method of multi-attribute and multi-evaluator are put forward . consider the wave of evaluator's preference caused by uncertainty, robust of quality attribute and concept in the stage of concept evaluation are put forward for the first time 第五章根據(jù)產(chǎn)品設(shè)計方案評價的特點,提出了支持多屬性群組評價的質(zhì)量屬性偏好聚合模型,并提出了基于證據(jù)推理與粗集理論的質(zhì)量屬性偏好聚合方法和理性化的偏好聚合方法;針對由不確定性引起的評價者偏好的波動,首次在方案設(shè)計階段根據(jù)偏好波動提出了質(zhì)量屬性和方案魯棒性的概念,給出了質(zhì)量屬性魯棒性的數(shù)學(xué)描述和方案魯棒性的計算方法;并且進(jìn)行了實例應(yīng)用。
Thereupon, in the 3rd chapter, the characteristics of the ecological systems are discussed and the necessity of aggregation is proposed, then, the method of choosing macro-variables is discussed, and the aggregation method for the systems of ordinary differential equation is proposed . in the 4th and 5th two examples : the model of single population and the model of two populations in different environment are discussed, the method which have proposed in 3rd chapter is implemented in the two examples 同時在第四章和第五章中分別介紹生態(tài)系統(tǒng)中的兩種情況:單物種的發(fā)展模型和兩物種在不同環(huán)境中競爭的模型,分別介紹了對這兩種模型建立過程,并且應(yīng)用第3章中介紹的方法對上述兩種模型進(jìn)行聚合。然后,對聚合后的聚合模型進(jìn)行分析,得到聚合模型的穩(wěn)定狀態(tài)。
The aggregation method reduces the dimension and the complexity of the micro-system, but the aggregation model is not the copy of the micro-system, so it makes new global properties emerge at the macro-level which is called emergence . in this paper, the concept of the functional emergence and the dynamical emergence are defined . the direction of emergence effect is bottom-up, and there also exists top-down effect which is called immergence 北京工業(yè)大學(xué)工學(xué)碩士論文通過模型的聚合縮減了模型的規(guī)模,給系統(tǒng)的分析和研究帶來了方便,但聚合模型畢竟不是原模型的拷貝,所以在聚合模型中會表現(xiàn)出同原模型不同的行為特性,微觀系統(tǒng)中微變量的變化會導(dǎo)致聚合模型不同的行為特性;即低層對高層的影響,這種影響稱為行為突現(xiàn)(eme,gence)。