Journal of Huanggang Normal University
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Papers 924
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本文报告一个研究股票交易者的羊群行为的实验.实验中控制组由单被试组成,独立进行买卖,实验组由群体被试组成,可以观察到其他被试的买卖行为.实验结果表明:单被试更加积极地买卖,群体被试倾向于少买卖,逆向羊群行为更为普遍.仅在价格回调到38.2%和100%时才出现正羊群行为,未发现卖出羊群行为,只有卖出逆羊群行为.
In food production,there are many factors influencing grain yield.Based on the grain yield of Anhui Province and the related indicators from 2000 to 2009,by calculating the grey correlation degree which indicates different influence factors of grain yield to have different impact on grain yield,we've obtained a descending sequence of the factors such as chemical fertilizer,total sown area grain,rural employee number,effective irrigative area,total agricultural machinery power,per capita net inco...
The cross product of two vectors aand bin 3-space can be given as a product Sab,where Sais a matrix that depends only on a.On this basis,we explored the relationship between vector cross product and matrix polar decomposition;moreover showed that this result is a natural consequence of the"polar decomposition"of the matrix Sa,and the polar decomposition is unique.Finally,apersuasive geometric interpretation of Theorem 1was given by using Rodriguez rotation formula.
The design for 3layers structure is accomplished by the Internet of Things(IOT),to achieve the study of demic Intelligent Monitoring System.The design of communication mode of demic Intelligent Monitoring System,by wired wireless communication,is given based on the system's functional constitute and performance index.The datapacket format is designed to transfer the information by RFID.The wired communication function is given based on PC,by the software engineering ideology.The experimental res...
A design of DC motor speed measurement and control system based on single chip microcontroller was presented.We took STC89C52 microcontroller as the key part of the system,which is mainly composed of the speed measurement and display module,speed control module,motor drive module,and in which the L298N chip was adopted to drive the motor,the speed data can be obtained through Hall sensor and displayed on the 4-digital tube,PWM wave can be generated by ADC0809,the hardware and software of the con...
In this paper,by constructing a suitable Lyapunov function,we obtain the global asymptotical stability of the Logistic model with feedback control and diffusion.It is shown that diffusion has no influence on the global asymptotical stability of the system with feedback control.
We used C8051f020 as the key controlling component of single chip microcomputer(SCM),pyroelectric infrared sensor module DYP-ME003 as the front-end detector,through SPI protocol model of ISD1700 voice chip for accurate control of audio playback function,realized voice doorbell recording,playback,alarm recording,broadcasting,etc.If someone rashly enters the house monitored,the monitor will instruct GSM module which is preset with proper information to send the emergent message to the owner's mobi...
Based on artificial neural network BP algorithm,referring to urban per capita GDP of Huanggang,investment in real estate development,the per-capita living space of urban residents and other related data from 2003 to 2010,we predict the 2011 and 2012 housing prices of Huanggang urban area.Compared with the data published,the data predicted meet the expected error bound.On this basis,we further predict housing prices in 2013,and find out that housing prices of Huanggang will keep increasing.From t...
6 strains of indigenous rhizobia in the area of Huanggang have been isolated from fresh peanut nodule extracts with YMA medium.They were separately named as HG-1,HG-2,HG-3,HG-4,HG-5 and HG-6.The isolated strains were inoculated back onto 3 varieties of peanut plants(Honghua-1,Honghua-2,Zhonghua-1)that are widely sowed in Huanggang.The results of the experiment in sand bottles show that all the peanut plants can nodulate after being inoculated with the strains,and all the isolated strains are pea...
Traditionally,using position sensors to capture rotor position signal is usually applied in brushless DC motor control system.However,the position sensor used will not only limit the usage of brushless DC motor in harsh environment,but also lead to the increase of motor size and the control circuit complexity.In order to overcome these shortcomings,in this paper,a brushless DC motor control system without position sensor was designed and manufactured based on the TI's Digital Signal Processor(DS...
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