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Search Results: 1 - 10 of 212741 matches for " Zhang Li-Zhi "
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A Novel Filter Bank Design Method with CEM FRM Technique
Li-Zhi Zhang,Wen-Yu Luo
International Journal of Distributed Sensor Networks , 2009, DOI: 10.1080/15501320802533798
Abstract: Modulation filter banks can be obtained by modulating one or two prototype filters, which reduce the design complexity of the filter banks. Furthermore, this kind of filter can be realized by using DFT or FFT with very high computationally efficiency. The proposition of a modulation filter bank reduces the computation complexity of designing the filter bank consumedly, which has very high computation efficiency. However, with the increasing of channels, the request for transition of the prototype filter is very high. This makes the length of the prototype filter longer, which decreases the computation efficiency.
Evolution of MicroRNA Genes in Oryza sativa and Arabidopsis thaliana: An Update of the Inverted Duplication Model
Yun Zhang, Wen-kai Jiang, Li-zhi Gao
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0028073
Abstract: The origin and evolution of microRNA (miRNA) genes, which are of significance in tuning and buffering gene expressions in a number of critical cellular processes, have long attracted evolutionary biologists. However, genome-wide perspectives on their origins, potential mechanisms of their de novo generation and subsequent evolution remain largely unsolved in flowering plants. Here, genome-wide analyses of Oryza sativa and Arabidopsis thaliana revealed apparently divergent patterns of miRNA gene origins. A large proportion of miRNA genes in O. sativa were TE-related and MITE-related miRNAs in particular, whereas the fraction of these miRNA genes much decreased in A. thaliana. Our results show that the majority of TE-related and pseudogene-related miRNA genes have originated through inverted duplication instead of segmental or tandem duplication events. Based on the presented findings, we hypothesize and illustrate the four likely molecular mechanisms to de novo generate novel miRNA genes from TEs and pseudogenes. Our rice genome analysis demonstrates that non-MITEs and MITEs mediated inverted duplications have played different roles in de novo generating miRNA genes. It is confirmed that the previously proposed inverted duplication model may give explanations for non-MITEs mediated duplication events. However, many other miRNA genes, known from the earlier proposed model, were rather arisen from MITE transpositions into target genes to yield binding sites. We further investigated evolutionary processes spawned from de novo generated to maturely-formed miRNA genes and their regulatory systems. We found that miRNAs increase the tunability of some gene regulatory systems with low gene copy numbers. The results also suggest that gene balance effects may have largely contributed to the evolution of miRNA regulatory systems.
Analytical solution of the Boltzmann--Poisson equation and its application to MIS tunneling junctions

Zhang Li-Zhi,Wang Zheng-Chuan,

中国物理 B , 2009,
Abstract: In order to consider quantum transport under the influence of an electron--electron (e--e) interaction in a mesoscopic conductor, the Boltzmann equation and Poisson equation are investigated jointly. The analytical expressions of the distribution function for the Boltzmann equation and the self-consistent average potential concerned with e--e interaction are obtained, and the dielectric function appearing in the self-consistent average potential is naturally generalized beyond the Thomas--Fermi approximation. Then we apply these results to the tunneling junctions of a metal--insulator--semiconductor (MIS) in which the electrons are accumulated near the interface of the semiconductor, and we find that the e--e interaction plays an important role in the transport procedure of this system. The electronic density, electric current as well as screening Coulombic potential in this case are studied, and we reveal the time and position dependence of these physical quantities explicitly affected by the e--e interaction.
Phylogeography of Camellia taliensis (Theaceae) inferred from chloroplast and nuclear DNA: insights into evolutionary history and conservation
Yang Liu, Shi-xiong Yang, Peng-zhang Ji, Li-zhi Gao
BMC Evolutionary Biology , 2012, DOI: 10.1186/1471-2148-12-92
Abstract: Here, we sampled 21 natural populations from the species' range in China and performed the phylogeography of C. taliensis by using the nuclear PAL gene fragment and chloroplast rpl32-trnL intergenic spacer. Levels of haplotype diversity and nucleotide diversity detected at rpl32-trnL (h?=?0.841; π?=?0.00314) were almost as high as at PAL (h?=?0.836; π?=?0.00417). Significant chloroplast DNA population subdivision was detected (GST?=?0.988; NST?=?0.989), suggesting fairly high genetic differentiation and low levels of recurrent gene flow through seeds among populations. Nested clade phylogeographic analysis of chlorotypes suggests that population genetic structure in C. taliensis has been affected by habitat fragmentation in the past. However, the detection of a moderate nrDNA population subdivision (GST?=?0.222; NST?=?0.301) provided the evidence of efficient pollen-mediated gene flow among populations and significant phylogeographical structure (NST?>?GST; P?<?0.01). The analysis of PAL haplotypes indicates that phylogeographical pattern of nrDNA haplotypes might be caused by restricted gene flow with isolation by distance, which was also supported by Mantel’s test of nrDNA haplotypes (r?=?0.234, P?<?0.001). We found that chlorotype C1 was fixed in seven populations of Lancang River Region, implying that the Lancang River might have provided a corridor for the long-distance dispersal of the species.We found that C. taliensis showed fairly high genetic differentiation resulting from restricted gene flow and habitat fragmentation. This phylogeographical study gives us deep insights into population structure of the species and conservation strategies for germplasm sampling and developing in situ conservation of natural populations.
Sparse Kernel Canonical Correlation Analysis
Delin Chu,Li-Zhi Liao,Michael K. Ng,Xiaowei Zhang
Lecture Notes in Engineering and Computer Science , 2013,
Abstract:
Genome Size Variation among and within Camellia Species by Using Flow Cytometric Analysis
Hui Huang, Yan Tong, Qun-Jie Zhang, Li-Zhi Gao
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0064981
Abstract: Background The genus Camellia, belonging to the family Theaceae, is economically important group in flowering plants. Frequent interspecific hybridization together with polyploidization has made them become taxonomically “difficult taxa”. The DNA content is often used to measure genome size variation and has largely advanced our understanding of plant evolution and genome variation. The goals of this study were to investigate patterns of interspecific and intraspecific variation of DNA contents and further explore genome size evolution in a phylogenetic context of the genus. Methodology/Principal Findings The DNA amount in the genus was determined by using propidium iodide flow cytometry analysis for a total of 139 individual plants representing almost all sections of the two subgenera, Camellia and Thea. An improved WPB buffer was proven to be suitable for the Camellia species, which was able to counteract the negative effects of secondary metabolite and generated high-quality results with low coefficient of variation values (CV) <5%. Our results showed trivial effects on different tissues of flowers, leaves and buds as well as cytosolic compounds on the estimation of DNA amount. The DNA content of C. sinensis var. assamica was estimated to be 1C = 3.01 pg by flow cytometric analysis, which is equal to a genome size of about 2940 Mb. Conclusion Intraspecific and interspecific variations were observed in the genus Camellia, and as expected, the latter was larger than the former. Our study suggests a directional trend of increasing genome size in the genus Camellia probably owing to the frequent polyploidization events.
Translation and Plurality of Interpretations: A Brief Discussion on Practical Significance in Translation of the
Li-zhi YE
Cross-Cultural Communication , 2005, DOI: 10.3968/1712
Abstract: Based on one of the theories of the modern philosophical hermeneutics---“ fusion of horizon”, the author of this paper is to put forward new perspectives to reconsider the criticism toward the two English versions of Chinese classical work---A Story of Red Mansions. The paper also elaborates the theoretical significance of “ fusion of horizon” in translation practice: It is an unavoidable fact that any target version has translator’s style, so we must have an objective attitude toward the cultural filtering and misunderstanding; translation and plurality of interpretations is the need of history; in order to produce ideal target version, translators should make efforts to enrich and perfect their horizon. Key words: hermeneutics, fusion of horizon, preconceived idea, translation and plurality of interpretations Résumé: Ce texte met en question les critiques sur les deux versions traduites du Rêve du pavillon rouge, et expose la signification de la théorie sur la traduction . Les textes traduits sont marqués plus ou moins de style personnel du traducteur , il faut donc traiter des problèmes de fausses traductions de fa on objective . En meme temps , le pluralisme de traduction et d’explication est devenu nécessaire en raison de l’ouverture du texte . Les traducteurs doivent s’y adapter pour améliorer la qualité de traduction Mots-clés: explicationisme , fusion horizontale , idee preconcu , le pluralisme d'explication 摘要:本文結合現代闡釋學“視域融合”的理論,對≤紅樓夢≥兩個不同譯本的有關批評提出異議,進一步闡述了闡釋學“視域融合”理論對翻譯的借鑒意義:即“先行結構”的影響使譯文不可避免地帶有譯者風格,因而應客觀看待“文化過濾”和誤譯現象。與此同時,文本的開放性使翻譯與闡釋的多元成為必要,作為譯者也應不斷完善自己的先行結構,以提高譯文的品質。 關鍵詞:闡釋學;視域融合;先行結構;闡釋的多元
Social Costs of the Patent System
Li-zhi NING
Canadian Social Science , 2006,
Abstract: The patent system is making progress and incorporating international practice at a tremendous pace in China. However, scholars have been raising doubts to the benefits of the patent system. They believe that the social costs borne by the developing countries for the patent system exceed the overall economic gains in the current international circumstances. China’s current patent system indicates that there is a lack of sufficient understanding of the social costs and of the cost-benefit analysis of the patent system, which causes many controversies. Nowadays the related study is still struggling to quantify the social cost, while the qualitative analysis is highly disputed. However, an anatomy of the social costs is necessary to take specific cost control measures for the purpose of establishing an economically more efficient patent system suitable under China’s current circumstances. Key words: Patent, Social Costs, Patent System Résumé: Pas à pas, la construction sur le système de patente en Chine est bien développé avec les co tumes internationals, relativement, les savants sont suspicieux sur l'éfficacité de ce système parce qu'il a déséquilibré le co t social des pays en développements avec le profit économic du monde entier, les pays en développements sont bien inquiets. Le système de patente chinois a un grand défaut dont l'analyse sur le co t-l'éfficacité n'est pas suffisante,et il provoque pas mal de contestation. Maintenat, l'analyse sur le co t social du système de patente n'a pas encore fait une conclusion précise, mais il est nécessaire de bien analyzer de divers co ts sociaux quand on forge le système de patente, afin qu'on puisse fonder un système qui peut bien contr ler le co t et peut bien adaptable à la situation du pays. Mots-Clés: La patente, le système de patente, le co t social
On the Relation of Exercising of Patent Rights and Antimonopoly Law
Li-zhi NING
Canadian Social Science , 2007,
Abstract: Antimonopoly law provides exemption for the legitimate exercising of patent rights, casts regulation and control over the patent abuse. This article expounds the exemption subject, exemption condition, exemption occasion as well as exemption category, elucidates the relation of abuse behavior and antimonopoly law, puts forward concrete regulating approach on the patent abuse by antimonopoly law. Key words: legitimate exercising of patent rights, patent abuse, antimonopoly law Résumé: le juste exercice du droit de propriété industrielle est immunisé selon la loi antitrust, j’expose dans cette thèse l’objet, la condition, l’occasion et la catégorie de son immunité. Pourtant, l’abus du droit de propriété industrielle est restreint aussi selon la loi antitrust, j’explique la relation entre l’abus du droit de propriété industrielle et la loi antitrust, puis propose mon projet afin de restreindre l’abus du droit de propriété industrielle par la loi antitrust. Mots-Clés: le juste exercice du droit de propriété industrielle, l’abus du droit de propriété industrielle, la loi antitrust
Law-economics Analysis for the Restriction of Intellectual
Li-zhi NING
Canadian Social Science , 2006,
Abstract: The restriction of Intellectual property rights, as an important principle and system in the Intellectual property law, has its own existence of the reasonable economic basis. This thesis begins with the definition of intellectual asset rights, reveals that the intellectual asset has the double properties of private products and public products, and demonstrates the rationality of moderate private right protection. And then it revises the economic senses in the intellectual property system using the method of economic analysis, and analyzes the important role which intrinsic balance mechanism and exterior restriction mechanism play, to guarantee information resource configured liquidly and carried on effectively. Key words: Law-economics, Restriction of intellectual property rights, Pareto criterion Résumé: En tant que le principe et l’institution importants du droit de propriété intellectuelle, la restriction du droit de propriété intellectuelle existe sur la base rationnelle de la science économique. Je commence dans cette thèse par la délimitation du droit de propriété intellectuelle afin de découvrir sa double caractéristique: produit privé et produit public, et d’argumenter la rationalité de le protéger mesurément comme le droit privé. Et ensuite, j’étudie la raison économique de l’institution du droit de propriété intellectuelle, au moyen d’analyse économique, et j’explique l’importance de son mécanisme équilibré à l’intérieur et son mécanisme restreint à l’extérieur pour assurer la distribution facile et la fonction effective des resources informatiques. Mots-Clés: droit-économie, restriction du droit de propriété intellectuelle, critère de PARETO
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