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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 | On Discount Weighting Grey Modeling of GM(1,1)显示文摘In allusion to the different sample value the different influences on forecast values, this paper putsforward a kind of discount weighting grey modeling method and establishes a kind of discount coefficient grey modelof GM (1, 1 ). It means much as respect to improve the validity and rationalics of forecast model in the course offorecast modeling. | WU Cheng-mao ZHANG Tao GAO Xiang-peng(Xi’an Institute of Posts and Telecommunications, Xi’an, 710061, P R. China) | 1999 | The Journal of China Universities of Posts and Telecommunications1999，6，2： | 4 |
| 3 | A survey of perioperative therapy for elective colon resection in Germany, 2006显示文摘 | Hasenberg T Rittler P Post S | 2007 | Der Chirurg2007，78，9： | 1 |
| 4 | Soil carbon pools and world life zones显示文摘 | POST W M EMANUEL W R ZINKE P J | 1982 | Nature1982，298，： | 1 |
| 5 | Adjuvant chemotherapy with gemcitabine vs observation in patients undergoing curative-intent resection of pancreatic cancer:a randomized controlled trlal显示文摘 | Oettle H Post S Neuhaus P | 2007 | JAMA2007，297，3： | 1 |
| 6 | Frame-based stereotactic resection of subcentimeter arteriovenous malformations in deep or eloquent regions of the brain:indications and technique with eight consecutive operations显示文摘 | Post N Russell SM Huang P | 2008 | Minim Invasive Neurosurg2008，51，2： | 1 |
| 7 | Soil carbon pools and world life zones显示文摘 | Post W M Emanuel W R Zinke P | 1982 | Nature1982，298，8： | 1 |
| 8 | Fozest soil carbon inventories and dynamics along an elevation gradient in the southern Appalachian Mountains 显示文摘 | Garten C T Post W M Hanson P J | 1999 | Biogeochemistry1999，45，2： | 1 |
| 9 | Soil carbon pools and world life zones显示文摘 | Post W M Rmanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 10 | Soil carbon pool and world life zone显示文摘 | Post W M Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 11 | Adjuvant chemotherapy with gemcitabine vs observation in patients undergoing curative-intent resection of pancreatic cancer: a randomized controlled trial显示文摘 | Oettle H Post S Neuhaus P | 2007 | JAMA2007，297，3： | 1 |
| 12 | The 2007 eastern US springfreeze:increased cold damage in a warming world?显示文摘 | GU L H HANSON P J POST W M | 2008 | Bioscience2008，58，3： | 1 |
| 13 | Soil pool and world life zones 显示文摘 | Post W M Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 14 | 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 |
| 15 | Evaluation of disease status with sensitive measures of growth hormone secretion in 60 postoperative patients with acromegaly显示文摘 | Freda P U Post K D Powell J S | 1998 | J Clin Endocrin of Metabo1998，83，11： | 1 |
| 16 | Ecological response to recent to recent climate change显示文摘 | Walther G R Post E Convey P | 2002 | Nature2002，416，： | 1 |
| 17 | Adjuvant chemotherapy with gemcitabine vs observation in patients undergoing curative-intent resection of pancreatic cancer: a randomized controlled trial显示文摘 | Oettle H Post S Neuhaus P | 2007 | JAMA2007，297，3： | 1 |
| 18 | Soil carbon pools and life zones显示文摘 | Emanuel W R Zinke P J | 1982 | Nature1982，298，： | 1 |
| 19 | Soil carbon pools and life zones显示文摘 | Post WM Emanuel WR ZINKE P J | 1982 | Nature1982，298，： | 1 |
| 20 | Soil carbon poolsand world life zones显示文摘 | Post W M EmanuelW R Zinke P | 1982 | Nature1982，298，8： | 1 |
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