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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 | The influence of impurity on the critical thickness of the CeO_2 buffer layer for coated conductors显示文摘The lattice parameters, band structure, density of state and elastic constant of RE-doped CeO2 (RE=Sm, Gd, Dy), the buffer material for coated HTS conductors, are calculated using the plane-wave method with pseudopotentials based on the density functional theory (DFT) of first-principle. The rule and mechanism of the effect of rare earth impurity on the critical thickness of the CeO2 buffer layer are investigated. It is found that, in the range of the calculation, the changes of the lattice volume V and elastic constant E of CeO2 with the impurity are mainly determined by the increased electrons ne of the system. The relationship of the elastic constant E and increased electrons ne is established. It is indicated that the critical thickness of the CeO2 single buffer layer doped with Sm, Gd, and Dy may be enhanced by 22%, 43% and 33%, respectively. | PAN Min1, HUANG Zheng2, MA HuanFeng2, QIANG WeiRong2, WEI LianFu1, WANG Long2 & ZHAO Yong1,3 1 Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education of China), Superconductivity R&D Center (SRDC), Southwest Jiaotong University, Chengdu 610031, China 2 School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China 3 Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wale, Sydney, 2052 NSW, Australia | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，7： | 3 |
| 3 | Competence of scalps for somatic embryogenesis in Musa显示文摘 | SCHOOLS H PANIS B SWENNEN R | 1998 | Acta Hort1998，490，： | 1 |
| 4 | Estimation of lead and arsenic bioavailability using a physiologically based extraction test显示文摘 | Ruby MV Davis A School R | 1996 | Environ Sci Technol1996，30，： | 1 |
| 5 | Experimental Researches on Carcinogenesis or Tumorigenicity of MDCK Canine Kidney Cell(CKC) Lines and Analysis of Their Chromosome Karyotypes显示文摘The chromosomal number variations & structural aberrations of the MDCK cell line, primary feline or canine kidney cell(FKC or CKC) and Hela cell line were investigated and their karyotypes of conventional chromosome bands were analyzed. The carcinogenesis or tumorigenicity testing of these cell lines in about 232 nude mice and for colony formation in soft agarose and for haemagglutination under different concentration of plant lectins of these cells were carried out. Under the prerequisite that the incidence of cancer or tumor in negative-control nude mice inoculated subcutaneously with primary feline or canine kidney cell cultures purified in vitro at passage 3 was 0 (0/22) and 0 (0/10), respectively. The incidence of the progressively-growing malignant tumor(MT) in positive-control nude mice inoculated subcutaneously with Hela cell cultures of KB, X, or NM20/X strain was 10/10, 25/25 and 5/51, respectively. The results showed that the incidence of tumor in nude mice with tetrapioid YA strain of MDCK cell during 20 - 45 passages, with hypodiploid JB strain of MDCK cell on passage 25, with di-and hypoploid JC strain of MDCK cell during 2 - 15passages or with hypoploid M strain of MDCK cell during 9 - 27 passages was 28/58, 1/5, 4/18 and 0/31,respectively. The chromosomal analysis results showed that the ratio of difference in the rate of modal chromosome number between high (mcs + n) and lowest (mcs)passages was not more than 5 % - 15 % and the structure aberrations was generally 0 - 3%. These results proved that the genetic characteristics of chromosomal number of cell lines determines their tumorigenicity, but it is species-specific. MDCK line has tumorigenicity no matter what its chromosome karyotype is, at least it has very low tumorigenicity even when its modal chromosome number is hypoploid. The repeatedly frozen, thawed and split controls of tumorigenicity-positive cell lines(X strain of Hela, M strain of BHK-21, JA strain of Vero, YA strain of MDCK) have much lower tumorigenicity or are even non-carcinogenesis, and the repeatedly frozen, thawed and split controls of very low tumorigenicity cell lines (M or JC strain of MDCK) are certainly non-carcinogenic and never have increased tumorigenicity.It is thus evident that MDCK cell of M, JB or JC strain can be approved as substrate for the preparation of attenuated viral vaccines, but MDCK cell of YA strain can not be approved as substrate for the preparation of comattenuated viral vaccines. In summary, all strains of MDCK cell line have tunorigenicity, at least have low tumorigencity, never have non-cancinogenic MDCK, but very low tumorigenicity MDCK cell strains can certainly be used for the approval production of canine viral vaccines if the DNA content in viral cell cultures was remarkably decreased through conventional means in manufacturing process. Therefore, the master cell stock and working cell bank of MDCK line used for vaccine manufacture were established in China, which are free of infectious agents, and described with respect to cytogenetic characteristics and tumorigenicity. Tests showed that there were correlations among cell line chromosome number variations, anchorage independence in soft agarose, haemagglutination under plant lectins, and tumor-forming ability in nude mice, thus all the in vitro tests are economic, simple and reliable means for monitoring the tumor-forming ability of MDCK line in nude mice. | ZHANG De-li, LI Liu-jin, XIA Geng-tian, HE Xu-yu, GAO Bu-xian, BAI Xiao-hong, HUANG Gao-sheng, LIU Shang-gao, YAN Long-fei and FANG Fu-de( Department of Immunology, School of Basic Medical Sciences , Peking University Health Science Center , Beijing 100083 , P. R . China Beijing Institute of Preventive Medicine , Beijing 100071 , P. R . China Department of Toxicology at Center for Research & Development of Animal Healthcare Products , Fourth Military Medical University , Xian 710032 , P. R . China Department of Pathology at School of Pre-clinical Education , Section of Pathology at Xi-Jing Hospital, Institute for Cancer Research at China Cancer Research Foundation , Fourth Military Medical University, Xian 710032 , P. R . China Key Open Laboratory of Preventive Veterinary Medicine of State Ministry of Agriculture, College of Animal Medical Sciences & State Key Laboratory of Agricultural Biotechnology , College of Biological Sciences , China Agricultural University , Beijing 100094 , P.R.China State Key Laboratory of Medical Molecular Biology, School of Basic Medical Sciences at the Peking Union Medical Colloge /Institute of Basic Medical Sciences at the Chinese Academy of Medical Sciences , Beijing 100005 , P. R . China) | 2002 | Agricultural Sciences in China2002，1，7： | 1 |
| 6 | The realm of microbial lipase in biotechnology显示文摘 | Pandey A Benjamin S School C R | | 0，，02： | 1 |
| 7 | Synthetic polymers seeded with chondrocytes provide a template for new cartilage formation显示文摘 | Langer R School B | 1991 | Plast Reconstr Surg1991，88，5： | 1 |
| 8 | Nonsingular plane cubic curves over finite fields显示文摘 | School R | 1987 | J Combin Theory Ser A1987，46，： | 1 |
| 9 | TPE production and use in the 1990s显示文摘 | School R | 1990 | Rubber World1990，201，6： | 1 |
| 10 | ULINO-optimally balancing U-shaped JIT assemly line显示文摘 | School A Klein R | 1999 | International Journal of Production Research1999，37，4： | 1 |
| 11 | Fuzzy Multi-Objective Decision Model of Supplier Selection with Preference Information显示文摘Supplier selection is a multi-objective decision problem, which must be considered many objectives, some objectives are qualitative, and others are quantitative. Meanwhile, manufacturer has preference for different suppliers. In this paper, a new multi-objective decision model with preference information of supplier is established. A practical example of supplier selection problem utilizing this model is studied. The result demonstrates the feasibility and effectiveness of the methods proposed in the paper. | Chen Zhixiang School of Management, Zhongshan University, Guangzhou 510275, P. R. China Ma Shihua & Chen Rongqiu School of Management, Huazhong University of Science & Technology, Wuhan 430074, R R. China | 2001 | Journal of Systems Engineering and Electronics2001，12，1： | 1 |
| 12 | , methodology and evaluation of a con- trolled study显示文摘 | J Kain R Uauy Albala F Vio R Cerda and B Leyton School--based obesity prevention in Chilean primary school children | 2004 | International Journal of Obesity2004，28，： | 1 |
| 13 | Elliptic curves over finite fields and the computation of square roots mod p显示文摘 | | 1985 | Mathematics of Computation1985，44，： | 1 |
| 14 | Establishment of Master Cell Stock and Working Cell Bank of MDCK Lines and Selection and Evaluation of the Lines as Candidate Viral Substrates for Approval Production of Combinational Canine Attenuated-live Virus Vaccines显示文摘Under the prerequisite that the incidence of cancer or tumor in negative-control nude mice inoculated subcutaneously with primary feline or canine kidney cell cultures purified in vitro at passage 3 was 0(0/22) and 0 (0/10), respectively. The incidence of the progressively-growing malignant tumor(MT) in positive-control nude mice inoculated subcutaneously with Hela cell cultures of KB, X, or NM20/X strain was 10/10, 25/25 and 5/51, respectively. The results showed that the incidence of tumor in nude mice with di-and hyperploid YB strain of MDCK cell during 17 - 23 passages, with hyper- and hypoploid KA strain of MDCK cell during 6 - 8 passages, with hypoploid WB strain of MDCK cell on passage 6, with hyper-and hypopioid H strain of MDCK cell during 8 - 24 passages was 2/24, 6/10, 5/10 and 10/15, respectively. The chromosomal analysis results showed that the ratio of difference in the rate of modal chromosome number between high(mcs + n) and lowest (mcs)passages was not more than 5- 15% and the structure aberrations was generally 0-3%. These results proved that the genetic characteristics of chromosomal number of cell lines determines their tumorigenicity, but it is species-specific. MDCK line has tumorigenicity no matter what its chromosome karyotype is, at least it has very low tumorigenicity even when its modal chromosome number is hypoploid. It is thus evident that MDCK cell of WB or H strain can be approved as substrate for the preparation of attenuated viral vaccines, but MDCK cell of YB or KA strain can not be approved as substrate for the preparation of attenuated viral vaccines. | ZHANG De-li, LI Liu-Jin, XIA Geng-tian, HE Xu-yu, GAO Bu-xian, BAI Xiao-hong, HUANG Gao-sheng, LIU Shang-gao, Department of Toxicology at Center for Research and Development of Animal Healthcare Products , Fourth Military Medical University , Xi’an 710032 , P. R . China Department of Pathology at School of Pre-clinical Education , Section of Pathology at Xi-Jing Hospital, Institute for Cancer Research at China Cancer Research Foundation , Fourth Military Medical University, Xi’an 710032 , P. R . China Key Laboratory of Preventive Veterinary Medicine of State Ministry of Agriculture , College of Animal Medical Sciences and State Key Laboratory of Agricultural Biotechnology, College of Biological Sciences , China Agricultural University, Beijing 100094 , P.R.China State Key Laboratory of Medical Molecular Biology, School of Basic Medical Sciences at the Peking Union Medical Collage /Institute of Basic Medical Sciences at the Chinese Academy of Medical Sciences , Beijing 100005 , P. R . China ) | 2002 | Agricultural Sciences in China2002，1，9： | 1 |
| 15 | Laser collimation of a chromium beam显示文摘 | School R E Gupte R McClelland J J | 1997 | Phys Rev A1997，55，2： | 1 |
| 16 | Behavior of Screw Connections in Ori- ented Residential Construction 显示文摘 | LaBoube R A School M A | 2001 | Journal of Structural Engineer- ing2001，127，6： | 1 |
| 17 | MicroRNAs in cancer treatment and prognosis显示文摘 | School C R Botelho E L Izzotti A | 2012 | American Journal of Cancer Research2012，2，： | 1 |
| 18 | Mierobleeds and the risk of recurrent stroke显示文摘 | Thijs V Lemmens R Schools C | 2010 | Stroke2010，41，9： | 1 |
| 19 | Blood, Urine, and Hair Kinetic Analysis Fo-llowing an Acute Lead Intoxication 显示文摘 | Ho G Keutgens A Schools R | 2011 | J Anal Toxicol2011，35，： | 1 |
| 20 | Bioavailability of Arsenic in Soil and House Dust Impacted by Smelter Activities Following Oral Administration in Cynomolgus Monkeys显示文摘 | Freeman G B School R A Ruby M V | 1995 | Fundamental and Applied Toxicology1995，，28： | 1 |
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