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Updating verbal and visuospatial working memory: Are the processes parallel?

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Chinese Science Bulletin 2008年第14期53卷 2175-2185页

作者： YUE ZhenZhu1,2, ZHANG Ming3,4 & ZHOU XiaoLin1 1 department of psychology, Peking university, Beijing 100871, china 2 Biological psychology and Neuropsychology, university of Hamburg, Von-Melle-Park 11, 20146 Hamburg, Germany 3 department of psychology, northeast normal university, changchun 13.02., china 4 Key Laboratory for Applied Statistics of MOE, northeast normal university, changchun 13.02., china NE normal Univ Dept Psychol Changchun 130024 Peoples R China.

The current study compared the processes of updating verbal and visuospatial working memory (WM) and examined the roles of central executive and slave systems in working memory updating tasks, by changing the number of items updated simultaneously to manipulate the load on central executive. Ex- periment 1 used the verbal WM updating task, and the results validated the efficiency of the paradigm to manipulate the load on central executive. Experiment 2 employed the verbal WM updating task, with the articulatory suppression task to interfere with the phonological loop. The results supported the study by Morris and Jones, revealing that the central executive system played an important role in the updating component of verbal WM, while the phonological loop was responsible for the serial recall component. Experiment 3 employed the visuospatial WM updating task, with the spatial tapping task to interfere with the visuospatial sketchpad. The results suggested that the visuospatial sketchpad and the central execu- tive together dealt with the updating component, while the visuospatial sketchpad was responsible for the serial recall component by itself. These results are consistent with the findings that visuospatial sketch- pad has close links with central executive, while the phonological loop is separated from the central ex- ecutive. It suggests that updating visuospatial and verbal WM are not two parallel processes.

关键词：记忆储存工作记忆中枢神经视觉性

Effect of monotoxicity and mixtoxicity of nitroaromatics to the green algae, Scienedesmus obliquus

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Journal of Environmental Sciences 2000年第3期12卷 367-368页

作者： LIU Jing\|ling, LANG Pei\|zheng (department of Environmental Sciences, northeast normal university, changchun 13.02., china) 西北师范大学甘肃长春 1 3 0 0 2

In general, many pollutants co\|exist in natural aquatic ecosystems. They affect each other and occur different results, such as synergism, addition and antagonism. So the research at mixtoxicity of contaminants to aquatic organism is more important than monotoxicity. In this paper, 50% effectual inhibition concentration 48h \%EC\%\-\{50\} values of 6 kinds of nitroaromatic compounds to the green algae, \%Scenedesmus obliquus,\% were investigated. Mixtoxic experiments, in which any combination of 2,4\|DNT and other 6 kinds of compounds, indicate: (1) synergisms between 2,4\|DNT and 4\|NAn, as well as 4\|NAnis, 1,4\|DNB; (2) antagonisms between 2,4\|DNT and 4\|NT, as well as 4\|NPh, 4\|NCB.

关键词： monotoxicity mixtoxicity nitroaromatics green algae

A general type of twisted anomaly cancellation formulas

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Science china Mathematics 2010年第7期53卷 1684-1695页

作者： WANG Yong School of Mathematics and Statistics, northeast normal university, changchun 13.02., china 1. School of Mathematics and Statistics Northeast Normal University Changchun 130024 China

For even-dimensional manifolds, we prove some twisted anomaly cancellation formulas which generalize some well-known cancellation formulas. For odd dimensional manifolds, we obtain some modularly invariant characteris... 详细信息

关键词： modular invariance transgression cancellation formulas

QUASI PERIODIC SOLUTIONS OF NEUTRAL VOLTERRA INTEGRAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAY

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Chinese Annals of Mathematics,Series B 1991年第2期12卷 157-163页

作者：王克 department of Mathematics Northeast Normal UniversityChangchunJilinChina

This paper deals with the uniqueness,existence and non-existence of quasi periodicsolutions of neutral Volterra integral differential equations of the form(1)and(2)Some new unique existence criteria and non-existence ... 详细信息

关键词： uniqueness Volterra neutral deals quasi normed implies 钟邵 milar holds

Z-Graded Lie Superalgebras with Depth One over Fields of Prime Characteristic

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Acta Mathematica Sinica,English Series 2002年第4期18卷 687-700页

作者： Yong Zheng ZHANG department of Mathematics. northeast normal university. changchun 13.02.. P. R. china department of Mathematics Northeast Normal University Changchun 130024 P. R. China

Let F be a field of characteristic p>3, and L=_(i≥-1) L_i the finite-dimensional transitive Z-graded simple Lie superalgebra over F. In this paper L is determined if the Z-graded Lie superalgebra L_(-1) L_O is isomo... 详细信息

关键词： Lie superalgebra Exterior algebra Field of prime characteristic

Tropomyosin is localized in the nuclear matrix and chromosome scaffold of physarum polycephalum

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Cell Research 1999年第1期9卷 61-69页

作者： ZENG XIAN LU MING DA JIAO MIAO XING XIAO GUANG WANG SHUI HAO(Institute of Genetics and Cytology, northeast normal university, changchun 13.02., china)(department of Biology, changchun normal College,changchun 130032, china) InstituteofGeneticsandCytology NortheastNormalUniversityChangchunChina.

The nuclei and chromosomes were isolated from plasmodia of Physarum polycephalum. The nuclear matrir and chromosome scaffold were obtained after the DNA and most of the proteins were extracted with DNase I and 2 M NaCl. SDS-PAGE analyses revealed that the nuclear matrir and chromosome scaffold contained a 37 kD polypeptide which is equivalent to tropomyosin in molecular weight. Immunofluorescence observations upon slide preparations labeled with anti-tropomyosin antibody showed that the nuclear matrix and chromosome scaffold emanated bright fluorescence, suggesting the presence of the antigen in *** results confirmed the presence of tropomyosin in the nuclear matrix and chromosome scaffold. Immunoelectron microscopic obserwtions further demonstrated that tropomyosin was dispersively distributed in the interphase nuclei and metaphase chromosomes.

关键词： Chromosome scaffold nuclear matrix Physarum polycephalum tropomyosin

Foreign peptides displayed on the major coat protein of filamentous bacteriophage

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Chinese Science Bulletin 1998年第14期43卷 1158-1162页

作者： WANG Li Institute of Genetics and Cytology, northeast normal university, changchun 13.02., china Institute of Genetics and Cytology Northeast Normal University Changchun China

The genome of filamentous bacteriophage can be engineered to display foreign peptides on the surface of the major coat protein. This display system offers an effective approach to researching the immunological recognition of protein. Studies show that this system has several advantages: 1) the specificity of the immune response; 2) the ability to recruit helper T cells; 3) needs no external adjuvants; 4) the structural mimicry of peptide epitopes. These suggest that this technology could be developed into a simple and inexpensive means to produce new biological reagents and vaccines. The development of this technology and the main property of filamentous bacteriophage are introduced in this paper. Some novel results about foreign peptides display using the main coat protein of filamentous bacteriophage are also summarized.

关键词： filamentous bacteriophage major coat protein epitope.

The restricted EM algorithm under linear inequalities in a linear model with missing data

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Science china Mathematics 2005年第6期48卷 819-828页

作者： ZHENG Shurong, SHI Ningzhong & GUO Jianhua School of Mathematics and Statistics, northeast normal university, changchun 13.02., china Institute of Mathematics, Jilin university, changchun 130012, china 1. School of Mathematics and Statistics Northeast Normal University 130024 Changchun China 2. Institute of Mathematics Jilin University 130012 Changchun China

This paper discusses the maximum likelihood estimate of β under linear inequalities A0β≥ a in a linear model with missing data, proposes the restricted EM algo rithm and proves the convergence.

关键词： EM algorithm, linear model, maximum likelihood estimate, missing data.

A family of transitive modular Lie superalgebras with depth one

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Science china Mathematics 2007年第10期50卷 1451-1466页

作者： Wen-de LIU~(1+) Yong-zheng ZHANG~2 ~1 department of Mathematics,Harbin normal university,Harbin 150080,china ~2 department of Mathematics,northeast normal university,changchun 13.02.,china 1. department of Mathematics Harbin Normal University Harbin 150080 China 2. department of Mathematics Northeast Normal University Changchun 130024 China

The embedding theorem is established for Z-graded transitive modular Lie superalgebras g■■■(g-1)satisfying the conditions: (i)g0■■(g-1) and g0-module g-1 is isomorphic to the natural■(g-1)-module; (ii)dim g1=2/3n(2n^2+1),where n=1/2dim g-1. In particular,it is proved that the finite-dimensional simple modular Lie superalgebras satisfying the conditions above are isomorphic to the odd Hamiltonian *** restricted Lie superalgebras are also considered.

关键词： flag, divided power algebra, modular Lie superalgebra, embedding theorem