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Search Results: 1 - 10 of 120310 matches for " Zhibin Wang "
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Inverse Eigenvalue Problem for Generalized Arrow-Like Matrices  [PDF]
Zhibin Li, Cong Bu, Hui Wang
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.212204
Abstract: This paper researches the following inverse eigenvalue problem for arrow-like matrices. Give two characteristic pairs, get a generalized arrow-like matrix, let the two characteristic pairs are the characteristic pairs of this generalized arrow-like matrix. The expression and an algorithm of the solution of the problem is given, and a numerical example is provided.
Expression of two insect-resistant genescryIA (b&c)/GNA in transgenic tobacco plants results in added protection against both cotton bollworm and aphids
Zhibin Wang,Sandui Guo
Chinese Science Bulletin , 1999, DOI: 10.1007/BF02884920
Abstract: The synthesizedBacillus thuringiensis insecticidal protein gene cryIA(b&c) and the synthesized geneGNA, (the mannose specific lectin from snowdrop (Galanthus nivalis)), tumefaciens have been inserted into plant expression vector pGW4BAI. Leave stripes ofNicotiana tabacum var. K326 have been transformed withAgrobacterium tumefaciens strain LBA4404 harboring the plant expression vector. 28 kanamycin resistant tobacco plants have been obtained. PCR and Southern blot analyses show that the foreigncryIA andGNA genes have been inserted into the genome of transformed tobacco plants. Haemagglutination assays show thatGNA has a functional activity. Leaf disc bioassays against cotton bollworm (H. armigera) show that the transgenic tobacco plants have a high insecticidal activity. The inhibition of aphid population in leaf disc bioassays againstMyzus persicae shows that the fecundity of aphid on transgenic plants is lower than that on untransformed plants; the aphid population on the transgenic tobacco plants is 25%–70% that on untransformed tobacco plants. ELISA analysis of ClyIA protein in tobcco leaves provides similar data to bioassay results. Through the two bioassays againstH. armigera andM. persicae, several transgenic tobacco plants showing high insect-resistant activities to both pests have been obtained.
Research on Financial Distress Prediction with Adaptive Genetic Fuzzy Neural Networks on Listed Corporations of China  [PDF]
Zhibin XIONG
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.25043
Abstract: To design a multi-population adaptive genetic BP algorithm, crossover probability and mutation probability are self-adjusted according to the standard deviation of population fitness in this paper. Then a hybrid model combining Fuzzy Neural Network and multi-population adaptive genetic BP algorithm—Adaptive Genetic Fuzzy Neural Network (AGFNN) is proposed to overcome Neural Network’s drawbacks. Furthermore, the new model has been applied to financial distress prediction and the effectiveness of the proposed model is performed on the data collected from a set of Chinese listed corporations using cross validation approach. A comparative result indicates that the performance of AGFNN model is much better than the ones of other neural network models.
Effect of different fertilization on spring cabbage (Brassica oleracea L. var. capitata) production and fertilizer use efficiencies  [PDF]
Zhibin Guo, ChuanLong He, Youhua Ma, Hongbin Zhu, Feng Liu, Daozhong Wang, Li Sun
Agricultural Sciences (AS) , 2011, DOI: 10.4236/as.2011.23029
Abstract: Just after transplanting, the vegetable has difficulty in nutrients uptake. To explore the effect of different fertilization on spring cabbage (Brassica oleracea L. var. capitata) production and fertilizer use efficiencies, this experiment consisting of six treatments was implemented and divided into three groups: 1) no fertilizer (NF) and vegetable planting fertilizer (VPF); 2) conventional fertilizer (CF) and conventional fertilizer + vegetable planting fertilizer (CVPF); 3) reduced fertilizer application (RFA) and reduced fertilizer application + vegetable planting fertilizer (RVPF). The results of this experiment indicated that the yields of spring cabbage treated by VPF increased by 38.20% in VPF, 16.00% in CVPF and 20.40% in RVPF than their controls respectively. Additionally, the VPF helped improve the total and economic yields of the spring cabbage in all groups, and the economic benefits increased by 38.21% in VPF, 15.97% in CVPF and 20.42% in RVPF than their controls respectively. Finally, the VPF was of benefit to spring cabbage to exploit the soil nutrients and helped improve the chemical fertilizer use efficiencies. Therefore, it is an efficient, economical and ecological fertilization for vegetable production to apply chemical fertilizers in combination with VPF.
TALEN-Mediated FLAG-Tagging of Endogenous Histone Methyltransferase DOT1L  [PDF]
Cheng An, Guangjing Zhu, Suzanne N. Martos, Xue Feng, Haimou Zhang, Yankai Jia, Zhibin Wang
Advances in Bioscience and Biotechnology (ABB) , 2017, DOI: 10.4236/abb.2017.89023
Abstract: Histone modification including H3 lysine 79 methylation (H3K79me) plays a key role during gene transcription and DNA damage repair. DOT1L, the sole methyltransferase for three states of H3K79me, is implicated in leukemia, colorectal cancer, and dilated cardiomyopathy. However, understanding of DOT1L and H3K79me in these pathways and disease pathogenesis has been limited due to the difficulty of working with DOT1L protein. For instance, locus-specific or genome-wide binding sites of DOT1L revealed by chromatin immunoprecipitation (ChIP)-based methods are necessary for inferring its functions, but high-quality ChIP-grade antibodies are currently not available. Herein we have developed a knock-in approach to tag endogenous DOT1L with 3 × Flag at its C-terminal domain to follow functional analyses. The knock-in was facilitated by using TALENs to induce a targeted double-strand break at the endogenous DOTIL to stimulate local homologous recombination at that site. The single cell colonies with successful knock-in were isolated and verified by different methods. We also demonstrated that tagged DOT1L maintains its normal function in terms of methylation and that the engineered cells would be very useful for further studies.
The genetic diversity of central and peripheral populations of ratlike hamster (Cricetulus triton)
Yongqing Wang,Zhibin Zhang,Laixiang Xu
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9048
Abstract: The impact of habitat fragmentation and isolation on the genetic diversity of populations has attracted much attention in studies of meta-population and conservation biology. In this work, using the randomly amplified polymorphic DNA (RAPD) technique, we studied the genetic diversity of central, peripheral and peninsular populations of ratlike hamster, which were collected in five locations of the North China Plain and its surrounding areas, in 1999. The study revealed that, i) the genetic diversity of central population of Raoyang County>the sub-central populations of Gu’an County and Taikang County > the peripheral population of Shunyi District>the peninsular population of Mentougou District; ii) the genetic diversities of the five populations were positively correlated to the nearest distances to the peripheral line of population distribution; iii) there were significant differences of gene frequencies of some RAPD fragments among the five populations. More RAPD fragments disappeared in peripheral populations than in central or sub-central populations. The frequencies of two RAPD fragments were correlated to the latitude. This study clearly indicated that the variation of the genetic diversities of the five populations was caused by edge effect and fragmentation through the enhanced inbreeding and genetic drift, and thus supported the view that habitat fragmentation and related edge effect reduce the population genetic diversity.
On the Convergence Rate of Kernel-Based Sequential Greedy Regression
Xiaoyin Wang,Xiaoyan Wei,Zhibin Pan
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/619138
On the Convergence Rate of Kernel-Based Sequential Greedy Regression
Xiaoyin Wang,Xiaoyan Wei,Zhibin Pan
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/619138
Abstract: A kernel-based greedy algorithm is presented to realize efficient sparse learning with data-dependent basis functions. Upper bound of generalization error is obtained based on complexity measure of hypothesis space with covering numbers. A careful analysis shows the error has a satisfactory decay rate under mild conditions. 1. Introduction Kernel methods have been extensively utilized in various learning tasks, and its generalization performance has been investigated from the viewpoint of approximation theory [1, 2]. Among these methods, a family of them can be considered as coefficient-based regularized framework in data-dependent hypothesis spaces; see, for example, [3–8]. For given samples , the solution of these kernel methods has the following expression , where and is a Mecer kernel. The aim of these coefficient-based algorithms is to search a set of coefficients with good predictive performance. Inspired by greedy approximation methods in [9–12], we propose a sparse greedy algorithm for regression. The greedy approximation has two advantages over the regularization methods: one is that the sparsity is directly controlled by a greedy approximation algorithm, rather than by the regularization parameter; the other is that greedy approximation does not change the objective optimization function, while the regularized methods usually modify the objective function by including a sparse regularization term [13]. Before introducing the greedy algorithm, we recall some preliminary background for regression. Let the input space be a compact subset and for some constant . In the regression model, the learner gets a sample set , where , are randomly independently drawn from an unknown distribution on . The goal of learning is to pick a function with the expected error as small as possible. Note that the regression function is the minimizer of , where is the conditional probability measure at induced by . The empirical error is defined as We call a symmetric and positive semidefinite continuous function a Mercer kernel. The reproducing kernel Hilbert space (RKHS) is defined to be the closure of the linear span of the set of functions with the inner product defined by . For all and , the reproducing property is given by . We can see because of the continuity of and the compactness of . Different from the coefficient-based regularized method [3–6], we use the idea of sequential greedy approximation to realize sparse learning in this paper. Denote , where and . The hypothesis space (depending on ) is defined as For any hypothesis function space , we denote . The
A nonlinear transformation of the dispersive long wave equations in (2+1) dimensions and its applications
Mingliang Wang,Yubin Zhou,Zhibin Li
Mathematics , 1998, DOI: 10.2991/jnmp.1998.5.2.2
Abstract: A nonlinear transformation of the dispersive long wave equations in (2+1) dimensions is derived by using the homogeneous balance method. With the aid of the transformation given here, exact solutions of the equations are obtained.
Species Differences in the Immunoreactive Expression of Oxytocin, Vasopressin, Tyrosine Hydroxylase and Estrogen Receptor Alpha in the Brain of Mongolian Gerbils (Meriones unguiculatus) and Chinese Striped Hamsters (Cricetulus barabensis)
Yu Wang, Linxi Xu, Yongliang Pan, Zuoxin Wang, Zhibin Zhang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0065807
Abstract: Species differences in neurochemical expression and activity in the brain may play an important role in species-specific patterns of social behavior. In the present study, we used immunoreactive (ir) labeling to compare the regional density of cells containing oxytocin (OT), vasopressin (AVP), tyrosine hydroxylase (TH), or estrogen receptor alpha (ERα) staining in the brains of social Mongolian gerbils (Meriones unguiculatus) and solitary Chinese striped hamsters (Cricetulus barabensis). Multiple region- and neurochemical-specific species differences were found. In the anterior hypothalamus (AH), Mongolian gerbils had higher densities of AVP-ir and ERα-ir cells than Chinese striped hamsters. In the lateral hypothalamus (LH), Mongolian gerbils also had higher densities of AVP-ir and TH-ir cells, but a lower density of OT-ir cells, than Chinese striped hamsters. Furthermore, in the anterior nucleus of the medial preoptic area (MPOAa), Mongolian gerbils had higher densities of OT-ir and AVP-ir cells than Chinese striped hamsters, and an opposite pattern was found in the posterior nucleus of the MPOA (MPOAp). Some sex differences were also observed. Females of both species had higher densities of TH-ir cells in the MPOAa and of OT-ir cells in the intermediate nucleus of the MPOA (MPOAi) than males. Given the role of these neurochemicals in social behaviors, our data provide additional evidence to support the notion that species-specific patterns of neurochemical expression in the brain may be involved in species differences in social behaviors associated with different life strategies.
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