检索结果-南通市图书馆

AREA FUNCTIONS ON HARDY SPACES ASSOCIATED TO SCHRDINGER OPERATORS

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2003年第4期23卷 521-530页

作者：朱月萍 department of Mathematics Nantong Teachers' College Nantong 226007 China

In this paper, the author gives a characterization of atomic Hardy spaces associated to Schrodinger operators by using area functions, and hence gets the dual spaces of atomic Hardy spaces.

关键词： Square function area function Hardy spaces Schrodinger operators

P_(4k-1)-factorization of complete bipartite graphs

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2005年第4期48卷 539-547页

作者： DU Beiliang & WANG Jian department of Mathematics, Suzhou University, Suzhou 2.5006, china {2. Vocational college, nantong 2.6007, china 1. department of Mathematics Suzhou University 215006 Suzhou China 2. nantong Vocational college 226007 Nantong China

Let Km,n be a complete bipartite graph with two partite sets having m and n vertices, respectively. A Pv-factorization of Km,n is a set of edge-disjoint pv-factors of Km,n which partition the set of edges of Km,n. When v is an even number, Wang and Ushio gave a necessary and sufficient condition for the existence of Pv-factorization of Km,*** v is an odd number, Ushio in 1993 proposed a conjecture. However, up to now we only know that Ushio Conjecture is true for v = 3. In this paper we will show that Ushio Conjecture is true when v = 4k - 1. That is, we shall prove that a necessary and sufficient condition for the existence of a P4k-1-factorization of Km,n is (1) (2. - 1)m ≤ 2.n, (2. (2. -1)n≤2.m, (3) m + n ≡ 0 (mod 4k - 1), (4) (4k -1)mn/[2.2. -1)(m + n)] is an integer.

关键词： complete bipartite graph, factorization, Ushio Conjecture.

Relationships between D1 protein, xanthophyll cycle and photodamage-resistant capacity in rice (Orysa sativa L.)

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2000年第17期45卷 1569-1575页

作者： Jl Benhua & JIAO Demao1. Institute of Agrobiological Genetics and Physiology, Jiangsu Academy of Agricultural Sciences, Nanjing 2.0014, china 2. department of Biology ,{2., nantong 2.6007, china Correspondence should be addressed to Jiao Demao Institute of Agrobiological Genetics and Physiology Jiangsu Academy of Agricultural Sciences Nanjing China department of Biology Nantong Teachers College Nantong China

Relationships between D1 protein, xanthophyll cycle and subspecific difference of photodamage-resistant capacity have been studied in O. japonica rice varieties 02.2. and 02. (photoinhibition-tolerance) and O. indica rice varieties 3037 and Palghar (photoinhibition-sensitivity) and their reciprocal cross F, hybrids after photoinhibitory treatment. It was shown that PS II photochemical efficiency (Fv /Fm) decreased, and xanthophyll cycle from violaxanthin (V), via anaxanthin (A), to zeaxanthin (Z) was enhanced and non-photochemical quenching (g/v) increased accordingly in SM-pretreated leaves of rice when the synthesis of D1 protein was inhibited, and that there was a decrease in qN and, as a result, more loss of D1 protein and a big decrease in Fv/Fm in DTT-pretreated leaves when xanthophyll cycle was inhibited. O. japonica subspecies had a higher maintaining capacity of D1 protein and a decrease of Fv /Fm in a more narrow range, and exhibited more resistance against photodamage, as compared with O.

关键词： D1 protein non-photochemical quenching photoinhibition of photosynthesis rice xanthophyll cycle.

P_(4k-1)-factorization of bipartite multigraphs

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2006年第7期49卷 961-970页

作者： WANG Jian & DU Beiliang nantong Vocational college,{2., china department of Mathematics, Suzhou University, Suzhou 2.5006, china 1. Vocational college Nantong 226007 China 2. department of Mathematics Suzhou University Suzhou 215006 China

LetλKm,n be a bipartite multigraph with two partite sets having m and n vertices, respectively. A Pν-factorization ofλKm,n is a set of edge-disjoint Pν-factors ofλKm,n which partition the set of edges ofλKm,n. Whenνis an even number, Ushio, Wang and the second author of the paper gave a necessary and sufficient condition for the existence of a Pν-factorization ofλKm,n. When v is an odd number, we proposed a conjecture. However, up to now we only know that the conjecture is true forν= 3. In this paper we will show that the conjecture is true whenν= 4k-1. That is, we shall prove that a necessary and sufficient condition for the existence of a P4k-1-factorization ofλKm,n is (1) (2.-1)m≤2.n, (2. (2.-1)n≤2.m, (3)m + n = 0 (mod 4k-1), (4)λ(4k-1)mn/[2.2.-1)(m + n)] is an integer.

关键词： bipartite multigraph, factor, factorization.

The proof of Ushio's conjecture concerning path factorization of complete bipartite graphs

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2006年第3期49卷 289-299页

作者： DU Beiliang & WANG Jian department of Mathematics, Suzhou University, Suzhou 2.5006, china {2. Vocational college, nantong 2.6007, china department of Mathematics Suzhou University Suzhou 215006 China nantong Vocational college Nantong 226007 China

Let Km,n be a complete bipartite graph with two partite sets having m and n vertices, respectively. A Pv-factorization of Km,n is a set of edge-disjoint Pv-factors of Km,n which partition the set of edges of Km,n. When v is an even number, Wang and Ushio gave a necessary and sufficient condition for existence of Pv-factorization of Km,n. When k is an odd number, Ushio in 1993 proposed a conjecture. Very recently, we have proved that Ushio's conjecture is true when v = 4k - 1. In this paper we shall show that Ushio Conjecture is true when v = 4k + 1, and then Ushio's conjecture is true. That is, we will prove that a necessary and sufficient condition for the existence of a P4k+1-factorization of Km,n is (i) 2.m ≤ (2. + 1)n,(ii) 2.n ≤ (2. + 1)m, (iii) m + n ≡ 0 (mod 4k + 1), (iv) (4k + 1)mn/[4k(m + n)] is an integer.

关键词： complete bipartite graph, factorization, Ushio Conjecture.

The spectrum of path factorization of bipartite multigraphs

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2007年第7期50卷 1045-1054页

作者： Jian WANG~1 Bei-liang DU~(2.) 1 nantong Vocational college,nantong 2.6007,china 2.department of Mathematics,Suzhou University,Suzhou 2.5006,china 1. nantong Vocational college Nantong 226007 China 2. department of Mathematics Suzhou University Suzhou 215006 China

Let λK m,n be a bipartite multigraph with two partite sets having m and n vertices, respectively. A P v-factorization of λK m,n is a set of edge-disjoint P v-factors of λK m,n which partition the set of edges of λK m,n . When v is an even number, Ushio, Wang and the second author of the paper gave a necessary and sufficient condition for the existence of a P v-factorization of λK m,n . When v is an odd number, we have proposed a conjecture. Very recently, we have proved that the conjecture is true when v = 4k ? 1. In this paper we shall show that the conjecture is true when v = 4k + 1, and then the conjecture is true. That is, we will prove that the necessary and sufficient conditions for the existence of a P 4k+1-factorization of λK m,n are (1) 2.m ? (2. + 1)n, (2. 2.n ? (2. + 1)m, (3) m + n ≡ 0 (mod 4k + 1), (4) λ(4k + 1)mn/[4k(m + n)] is an integer.

关键词： bipartite multigraph factorization 05B30 05C70

K_(p,q)-factorization of complete bipartite graphs

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2004年第3期47卷 473-479页

作者： DU Beiliang WANG Jian department of Mathematics, Suzhou University, Suzhou 2.5006, china {2. Vocational college, nantong 2.6007, china 1. department of Mathematics Suzhou University 215006 Suzhou China 2. nantong Vocational college 226007 Nantong China

Let Km,n be a completebipartite graph with two partite sets having m and n vertices,respectively. A Kp,q-factorization of Km,n is a set ofedge-disjoint Kp,q-factors of Km,n which partition theset of edges of Km,n. When p=1 and q is a prime number,Wang, in his paper 'On K1,k-factorizations of a completebipartite graph' (Discrete Math, 1994, 12.: 359-364),investigated the K1,q-factorization of Km,n and gave asufficient condition for such a factorization to exist. In the paper'K1,k-factorizations of complete bipartite graphs' (DiscreteMath, 2.02. 2.9: 301-306), Du and Wang extended Wang's resultto the case that q is any positive integer. In this paper, we give a sufficient condition for Km,n to have aKp,q-factorization. As a special case, it is shown that theMartin's BAC conjecture is true when p:q=k:(k+1) for any positiveinteger k.

关键词： complete bipartite graph factorization HUBMFS 2.scheme

Syntheses,characterization,crystal structure and magnetic properties of copper(Ⅱ) α,β-unsaturated carboxylate complexes with trimethyl phosphate

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2001年第12期46卷 987-991页

作者： WANG Yaoyu, LIU Ping, SHI Qian, GAO Yici & SHI Qizhen1. department of chemistry, Northwest University, Xi’an 710069,{2. 2. department of chemistry, Wenzhou teachers college, Wenzhou 32.003,{2. 3. department of chemistry, Lanzhou University, Lanzhou 730000,{2. department of chemistry Northwest University Xi’an China department of chemistry Wenzhou Teachers College Wenzhou China department of chemistry Lanzhou University Lanzhou China

Two ternary complexes Cu2.4[OP(OCH3)3]2.(A represents CH2.CH-COO- and CH2.C(CH3)-COO-) have been synthesized, and elemental analyses, IR, ESR, electronic reflectance spectra and magnetic studies were carried out. The single crystal X-ray diffraction shows that Cu2.CH2.C(CH3)-COO]4[OP(OCH3)3]2.is triclinic, with space group P1, a = 1.0512.(13), b = 1.7559(5), c = 1.94479(3) nm, α =91.2.3(14)°,(β = 102.559(6)°,γ= 106.339(13)°, Z = 4 and R = 0.0668. Two copper(Ⅱ) atoms are bridged by four (a-methacrylate groups, and each copper(Ⅱ) atom is coordinated with a trimethyl phosphate molecule in the axial position, forming a distorted square pyramidal configuration. The symmetric center is between the two copper(Ⅱ) atoms, and the Cu-Cu bond distance is 0.2.098(6) nm. The Cu-Cu distance and magnetic studies suggest that there exist anti-ferromagnetic interactions between the two copper(Ⅱ) atoms.

关键词： copper(Ⅱ ) complex α β-unsaturated carboxylate trimethyl phosphate magnetic property crystal structure.

Protein expression profile in the differentiation of rat bone marrow stromal cells into Schwann cell-like cells

在线全文

学校读者我要写书评

暂无评论

Science china(Life Sciences) 2009年第3期52卷 267-277页

作者： LI WenTing1,SUN HuaLin2.XU ZengLu1,DING Fei2.& GU XiaoSong2.1 department of Anatomy,Histology and Embryology,Peking Union Medical college,Institute of Basic Medical Science,Chinese Academy of Medical Sciences,Beijing 100005,{2. 2.Jiangsu Key Laboratory of Neuroregeneration,nantong University,nantong 2.6001,{2. 1. department of Anatomy Histology and Embryology Peking Union Medical College Institute of Basic Medical Science Chinese Academy of Medical Sciences Beijing 100005 China 2. Jiangsu Key Laboratory of Neuroregeneration Nantong University Nantong 226001 China

During the last decade,increasing evidence suggested that bone marrow stromal cells(MSCs) have the potential to differentiate into neural *** studies have reported that MSCs showed morphological changes and expressed a limited number of neural proteins under experimental ***,no proteomic studies on MSCs differentiated into Schwann cell-like cells have been *** this study,we isolated MSCs from adult Sprague-Dawley rat femur and tibia bone marrows and induced the cells in vitro under specific *** using two-dimensional gel electrophoresis(2.DE),we compared the protein profiles of MSCs before and after induced *** obtained 792.protein spots in the protein profile by 2.DE,and found that 74 spots changed significantly before and after the differentiation using PDQuest software,with 43 up-regulated and 31 *** analyzed these 74 spots by a matrix assisted laser desorption ionization-time of flight mass spectrometry(MALDI-TOF-MS) and by database searching,and found that they could be grouped into various classes,including cytoskeleton and structure proteins,growth factors,metabolic proteins,chaperone proteins,receptor proteins,cell cycle proteins,calcium binding proteins,and other *** proteins also include neural and glial proteins,such as BDNF,CNTF and *** results may provide valuable proteomic information about the differentiation of MSCs into Schwann cell-like cells.

关键词： one marrow stromal cells(MSCs) differentiation Schwann cell-like cells proteomics