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Entire vectors.for unbounded normal operators and abstract Cauchy problems

Chinese Science Bulletin 1997年第15期42卷 1253-1256页

作者： LI YangrongDepartment of Mathematics, Southwest Normal University, Chongqing 630715, China Department of Mathematics Southwest Normal University Chongqing China

LET A be a closed operator on a Banach space X, and C~∞ (A)=∩_n~∞=1,D(A^n). The C~∞ vec-tor x is an entire vector for A if sum from n=0 to ∞ (t^n)/(n!)||A^n x||0. We will write ε(A) for the set of all entire vectors.for A. It is well known that the set of entire vectors.for a self-adjoint operator is dense. Inthis note, we generalize this result to the situation of (unbounded) normal operators. We

关键词： C-semigroups analytic semigroups normal operators entire vectors.

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Human clotting factor Ⅸ (hF Ⅸ ) secretion in goat milk after direct transfer with hF Ⅸ minigene into mammary gland by using retroviral vectors

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Chinese Science Bulletin 1997年第15期42卷 1308-1313页

作者： ZHANG Kezhong, WANG Hongwei, BAO Yun, LU Daru,XUE Jinglun (J. L. Hsueh), QIU Xinfang, HUANG Shuzhen,HUANG Ying, LI Bingyan, LI Hua and ZENG Yitao1. Institute of Genetics, Fudan University, Shanghai 200433, China 2 Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai 200040, China

THE mammary gland bioreactor system of lactating animal, established by germ-linemicroinjection and embryo transplantation, has been one of the most exciting projects in thefield of biotechnology. However, this system is costly, laborious and tim-cosuming. In 1994,Johanna et al. reported that secretion of a foreign protein, human growth hormone (hGH),in milk had been achieved after direct introduction of the cDNA into the mammary gland ofgoats by replication-defective retroviral vector. In that work, the in vivo expression of

关键词： mammary-specific expression human clotting factor Ⅸ (hF Ⅸ) retroviral vectors.

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Simulations of Using vectors.in Natural Sciences Education

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Computer Technology and Application 2013年第9期4卷 455-459页

作者： Dijana Capeska Bogatinoska Linda Fahlberg Stojanovska Biljana Janakievska University of Information Science and Technology St. Paul the Apostle Ohrid 6000 R. Macedonia Faculty of Technical Sciences Univ. St. Clement of Ohrid Bitola 7000 R. Macedonia Warehouse Skopsko JL Transport Bitola 7000 R. Macedonia

The implementation of ICT （information and communication technologies） into the educational process is becoming a reality in the 21st century. Today＇s students grow up with technology. To keep their attention, scientific problems should be solved through visualization, which is made possible using ICT in the educational process. In the modem educational process, students still have difficulties in learning science concepts. Also, it is a very common problem that students cannot apply mathematical language and concepts into other science areas such as physics, engineering, etc. For example, students start learning about vectors.in mathematics in secondary school. vectors.are very important because they have a wide area of applications especially in physics, engineering and navigation to represent forces, tension, velocity, etc.. Using the free mathematical software GeoGebra, a simulation of using vectors.in these areas is made. It will be shown that such simulations increase students＇ interest, keep their attention, and make this knowledge more real and more understandable and connected to the physical world and thus more applicable to their other studies.

关键词： Education GeoGebra ICT vectors.

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