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| 1 | The Machine Recognition for Population Feature of Wheat Images Based on BP Neural Network显示文摘Recognition and analysis of dynamic information about population images during wheat growth periods can be taken for the base of quantitative diagnosis for wheat growth. A recognition system based on self-learning BP neural network for feature data of wheat population images, such as total green areas and leaves areas was designed in this paper. In addition, some techniques to create favorable conditions for image recognition was discussed, which were as follows: (1) The method of collecting images by a digital camera and assistant equipment under natural conditions in fields. (2) An algorithm of pixei labeling was used to segment image and extract feature. (3)A high pass filter based on Laplacian was used to strengthen image information. The results showed that the ANN system was availability for image recognition of wheat population feature. | LI Shao-kun, SUO Xing-mei, BAI Zhong-ying, QI Zhi-li, Liu Xiao-hong, GAO Shi-ju and ZHAO Shuang-ning( Institute of Crop Breeding and Cultivation /Key Laboratory of Crop Genetic & Breeding, Ministry of Agriculture, ChineseAcademy of Agricultural Sciences, Beijing 100081 , P . R . China Department of Computer Science and Technology, CentralUniversity for Nationalities, Beijing 100081 , P. R . China School of Computer Science and Technology, Beijing Universityof Posts and Telecommunications, Beijing 100876, P. R . China Research Center of Xinjiang Crop High-yield,Shihezi University, Shihezi 832003, P.R. China) | 2002 | Agricultural Sciences in China2002，1，8： | 4 |
| 2 | Soil carbon pools and world life zones显示文摘 | POST W M EMANUEL W R ZINKE P J | 1982 | Nature1982，298，： | 1 |
| 3 | Soil carbon pools and world life zones显示文摘 | Post W M Emanuel W R Zinke P | 1982 | Nature1982，298，8： | 1 |
| 4 | Soil carbon pools and world life zones显示文摘 | Post W M Rmanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 5 | Soil carbon pool and world life zone显示文摘 | Post W M Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 6 | Soil pool and world life zones 显示文摘 | Post W M Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 7 | Soil car- bon pools and world life zones 显示文摘 | Post W M Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 8 | Ecological response to recent to recent climate change显示文摘 | Walther G R Post E Convey P | 2002 | Nature2002，416，： | 1 |
| 9 | Soil carbon pools and life zones显示文摘 | Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 10 | Soil carbon poolsand world life zones显示文摘 | Post W M EmanuelW R Zinke P | 1982 | Nature1982，298，8： | 1 |
| 11 | Soil carbon pools and world life zones显示文摘 | Post W M Emanuel W R Zinke P J | 1982 | Nature1982，298，2： | 1 |
| 12 | Soil carbonpools and world life zones 显示文摘 | Post W M Emanuel W R Zinke P | 1982 | Nature1982，298，15： | 1 |
| 13 | Soil carbon pools and world life zones显示文摘 | POST W M EMANUEL W R EZINK P J | 1982 | Nature1982，298，： | 1 |
| 14 | Soil carbon pools and world life zones显示文摘 | POST W M EMANUEL W R ZINKE P J | 1982 | Nature1982，298，8： | 1 |
| 15 | Information retrieval in the World-Wide web:making client-bated searching feasible显示文摘 | De Bra P M E Post R D J | 1995 | Computer Networks and ISDN Systems1995，27，2： | 1 |
| 16 | Ecological responses to recent climate change显示文摘 | Walther G R Post E Convey P | 2002 | Nature2002，416，： | 1 |
| 17 | E broidery:design and fabrication of textile based computing显示文摘 | ORTH M RUSSO P R | 2000 | BM Systems Journal2000，39，3： | 1 |
| 18 | Soil pool and world life zones显示文摘 | Post W M Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 19 | Perfluorooctanoic acid (PFOA), an emerging drinking water contaminant: A critical review of recent literature显示文摘 | Post G B Cohn P D Cooper K R | 2012 | Environmental Research2012，116，： | 1 |
| 20 | Soil Carbon Pools and World Life Zones 显示文摘 | POST W M EMANUEL W R ZINKE P J | 1982 | Nature1982，298，： | 1 |
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