Modeling greenhouse air humidity by means of artificial neural network and principal component analysis
文献类型: 外文期刊
第一作者: He, Fen
作者: He, Fen;Ma, Chengwei;He, Fen
作者机构:
关键词: air temperature;environmental factors;greenhouses;humidity;models;neural networks;principal component analysis;regression analysis;solar radiation;vents;wind speed;Beijing;China
期刊名称:COMPUTERS AND ELECTRONICS IN AGRICULTURE ( 影响因子:5.565; 五年影响因子:5.494 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: A back propagation neural network (BPNN) based on principal component analysis (PCA) was proposed for modeling the internal greenhouse humidity in winter of North China. The environment factors influencing the inside humidity include outside air temperature and humidity, wind speed, solar radiation, inside air temperature, open angle of top vent and side vent, and open ration of sunshade curtain, which were all collected as data samples. Through PCA of these data samples, 4 main factors were extracted, and the relationship between the main factors and the original data was discussed. Taking the principal component values as the input of BPNN, the model showed a good performance. A comparison was made between the performances of the BPNN based on PCA and the stepwise regression method with 20 data samples which had not been used to establish the NN model, and the prediction of stepwise regression method was less accurate than the BPNN based on PCA.
分类号: S
- 相关文献
作者其他论文 更多>>
-
An Analysis of the Influence of Construct Parameters on the Solar Radiation Input in an Insulated Plastic Greenhouse
作者:Tian, Dongkun;Zhao, Shumei;Ma, Chengwei;Song, Weitang;Li, Yanfeng;Wu, Qinan;Zhao, Shumei;Ma, Chengwei;Song, Weitang
关键词:insulated plastic greenhouse; solar radiation; structure parameters; mathematical model
-
Experimental study on the feasibility and thermal performance of a multifunctional air conditioning system using surplus air thermal energy to heat a Chinese solar greenhouse
作者:He, Xueying;Wang, Pingzhi;Song, Weitang;Ma, Chengwei;Li, Ming;Wang, Pingzhi;Song, Weitang;Ma, Chengwei;Li, Ming;Wu, Gang
关键词:Solar greenhouse; Greenhouse heating; Surplus air thermal energy; Air conditioning system; Performance
-
An active solar water wall for passive solar greenhouse heating
作者:Xu, Weiwei;Xu, Weiwei;Ma, Chengwei;Guo, Huiqing;Ma, Chengwei
关键词:Solar energy; Chinese solar greenhouse; Solar water wall; Solar heating system; Hollow polycarbonate sheet
-
Investigation of a root zone heating system for greenhouse seedling and its effects on micro-environment
作者:He, Fen;Hou, Yong;Li, Kai;Wei, Xiaoming;Liu, Yaqing;He, Fen;Hou, Yong;Li, Kai;Wei, Xiaoming;Liu, Yaqing;Wei, Xiaoming
关键词:greenhouse; root zone heating system; micro-environment; seedling; substrate temperature; air temperature
-
Numerical evaluation of the effect of mesopore microstructure for carbon electrode in flow battery
作者:Wang, Min;Zhou, Jiangqi;Ma, Chengwei;Li, Xiangyang;Li, Xin;Du, Jianjun;Bao, Lixia
关键词:Redox flow battery; Numerical simulation; Three dimensional; Porous electrode
-
Analysis of moisture and total sugar content of Huizao based on surface images
作者:Zhang, Junxiong;Ma, Qingqing;Qu, Feng;Li, Wei;He, Fen;He, Fen
关键词:Huizao; step discriminatory analysis; moisture content; total sugar
-
Comparison between equivalent spring element method and additional mass method in nuclear power structure
作者:Wang, Jin-Xiao;Song, Meng-Yan;Fu, Peng;He, Fen
关键词:Equivalent spring element method;Additional mass method;Dynamic characteristics