Control efficacy of complex networks

Acknowledgements W.-X.W. was supported by CNNSF under Grant No. 61573064, and No. 61074116 the Fundamental Research Funds for the Central Universities and Beijing Nova Programme, China. Y.-C.L. was supported by ARO under Grant W911NF-14-1-0504.Peer reviewedPublisher PD

Empirical Analysis of Shanghai Stock Exchange Index Based on ARMIA Model and Neural Network Model

 Stocks are an important part of the national economy. With the increase of liquidity in people's hands, more and more people choose to enter the stock market. In stock investment, accurate prediction of stock price index is not only of great significance to investors, but also of promoting the development of my country's stock market. It even has an important role in accelerating my country's economic development. The paper chose the ARIMA method based on linear technology for time series forecasting and the NN model that is good at mining the implicit nonlinear relationship in the data to compare the China Sea Securities Composite Index from January 21, 2020 to December 31, 2020. Empirical analysis of closing prices and short-term forecasts are made

Analysis of coupling vibration characteristics of electrically driven pile hammer linkage system

In order to solve the problem that electromechanical coupling had influences on the control effect of multi-pile hammers linkage, the coupling influence rules were studied. With the complex system of hammer-pile-soil being simplified, the dynamic model was constructed for the two pile hammers vibration system. The mathematical equations of systemic electromechanical coupling were established. Based on the Hamilton principle, synchronous operation conditions and system stability were established. Simulation model was developed with MATLAB/Simulink for numerical simulation. The electromechanical coupling processes and the basic system rules were obtained under different electrical motors’ speeds, the initial phase differences, soil parameters and fixing parameters. It could be found that electromechanical coupling might result in self-synchronization under given conditions. Finally, the mathematical model’s validity, theoretical derivation and simulation results were proved by some experiments. The analytical conclusions of electromechanical coupling rules provide the theoretical evidence for making control strategy on electric control linkage mode, and the basis for related engineering applications and experiments

A Study on the Classification and the ‘Catching’ of the ‘Arrived Qi’ in Acupuncture

AbstractThis essay studies the phenomenon of ‘obtaining of qi’ in acupuncture. Combined with clinical practice, the authors think that it was a habitual misunderstanding in the past to equate ‘needling sensation’ to ‘obtaining of qi’ in acupuncture practice. The two concepts are different and are related with each other. The authors have also classified the phenomenon of ‘obtaining of qi’ according to its depth in the skin layer. Based on the research achievements in neuroscience, the authors propose the study on ‘catching’ the specific cerebrations, so as to reveal the essence of ‘obtaining of qi’