GSM网络无线参数的优化研究
作者：
熊婧文;容强;周宇;胡剑炜;刘莺
期刊：
科技视界 ,2015年(34):38-39 ISSN：2095-2457
作者机构：
湖南农业大学理学院信息系;[胡剑炜] 中国移动通信集团湖南有限公司;[周宇; 容强; 熊婧文; 刘莺] 湖南农业大学
关键词：
网络优化;无线参数;网络DT测试
摘要：
掉话现象是用户使用手机过程中常遇到的问题,所以网络优化是移动通信运营商工作的重点。本文首先阐述GSM网络无线参数优化的相关理论,然后结合实际案例,以BSC6000（资源配置软件）和电子地图为基础工具,采用TEMS（网络测试分析软件）设备进行网络DT测试,通过调整无线参数达到网络优化的目的。
语种：
中文
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An improved mathematical object for graphical representation of DNA sequences
作者：
Peng, Yan;Liu, Yuewu*
期刊：
CURRENT BIOINFORMATICS ,2015年10(3):332-336 ISSN：1574-8936
通讯作者：
Liu, Yuewu
作者机构：
[Peng, Yan] Hunan Agr Univ, Key Lab Crop Germplasm Innovat & Utilizat Hunan P, Changsha 410128, Hunan, Peoples R China.;[Liu, Yuewu] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Liu, Yuewu] H;Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
关键词：
DNA sequence;graphical representation;mathematical object;sequence comparison;similarity/dissimilarity matrix;x;y-coordinates.
摘要：
An improved mathematical object is presented for analyzing the similarity and dissimilarity of DNA sequences. The kernel of it is to employ the changes of the x-coordinates and y-coordinates of the points corresponding to the bases of DNA sequence in the method of graphical representation, respectively. Compared with the traditional methods based on the distances between points, a more detailed consideration on the measurement between points is made in this new method, so more information of DNA sequence is exploited. It can distinguish any form of symmetrical curves corresponding to DNA sequences, and this advantage can hardly be achieved by traditional methods. Furthermore, the contrast experiments show that this method increases the precision by about 50%.
语种：
英文
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A Novel Numerical Characterization for Graphical Representations of DNA Sequences
作者：
Peng, Yan;Liu, Yuewu*
期刊：
MINI-REVIEWS IN ORGANIC CHEMISTRY ,2015年12(6):534-539 ISSN：1570-193X
通讯作者：
Liu, Yuewu
作者机构：
[Peng, Yan] Hunan Agr Univ, Key Lab Crop Germplasm Innovat & Utilizat Hunan P, Changsha 410128, Hunan, Peoples R China.;[Liu, Yuewu] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Liu, Yuewu] H;Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
关键词：
Graphical representations of DNA sequences;mathematical object;matrix invariant;sequence comparison;similarity/dissimilarity analysis of DNA sequences.
摘要：
A novel numerical characterization for graphical representations of DNA sequences is proposed, which consists of two steps: construction of a novel mathematical object that only takes the first row of the traditional mathematical object and then analysis of the similarities/dissimilarities using the distance between the objects of DNA sequences. Our novel mathematical object is only a row vector and calculation of the matrix invariant is avoided, it can significantly lessen the computation. We demonstrate that this novel method can extract enough information of DNA sequences by analyzing the probabilities of six cases. The contrast experiments show that our method has similar results to the traditional methods.
语种：
英文
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An acid-free rechargeable battery based on PbSO4 and spinel LiMn2O4
作者：
Liu, Yu;Wen, Zubiao* ;Wu, Xiongwei;Wang, Xiaowei;Wu, Yuping;...
期刊：
Chemical Communications ,2014年50(89):13714-13717 ISSN：1359-7345
通讯作者：
Wen, Zubiao
作者机构：
[Liu, Yu; Wu, Xiongwei; Wu, Yuping] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Liu, Yu; Wen, Zubiao] Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Peoples R China.;[Liu, Yu; Holze, Rudolf] Tech Univ Chemnitz, Inst Chem, AG Elektrochem, D-09107 Chemnitz, Germany.;[Wang, Xiaowei; Wu, Yuping] Fudan Univ, Dept Chem, New Energy & Mat Lab, Shanghai 200433, Peoples R China.;[Wang, Xiaowei; Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.
通讯机构：
[Wen, Zubiao] J;Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Peoples R China.
摘要：
An acid-free lead rechargeable battery system comprising PbSO4 as the negative electrode, LiMn2O4 as the positive electrode and a neutral Li2SO4 aqueous solution as electrolyte is reported and its electrochemical performance is very good. It shows great promise to reduce the global use of lead by 50% since it is also low cost.
语种：
英文
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Sensitive square wave anodic stripping voltammetric determination of Cd2+ and Pb2+ ions at Bi/Nafion/overoxidized 2-mercaptoethanesulfonate-tethered polypyrrole/glassy carbon electrode
作者：
Chen, Li;Li, Zou;Meng, Yue;Zhang, Pei;Su, Zhaohong;...
期刊：
Sensors and Actuators B-Chemical ,2014年191:94-101 ISSN：0925-4005
通讯作者：
Xie, Qingji
作者机构：
[Su, Zhaohong; Liu, Ying; Zhou, Yaping; Xie, Qingji; Zhang, Pei; Huang, Yi; Meng, Yue; Chen, Li; Li, Zou; Yao, Shouzhuo] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Hunan, Peoples R China.;[Su, Zhaohong] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Xie, Qingji] H;Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Hunan, Peoples R China.
关键词：
2-Mercaptoethanesulfonate;Bismuth film electrode;Cd2+;Overoxidation of polypyrrole;Pb2+;Square wave anodic stripping voltammetry
摘要：
Square wave anodic stripping voltammetry was applied to detect Pb <sup>2+</sup> and Cd<sup>2+</sup> ions at a glassy carbon electrode modified with overoxidized 2-mercaptoethanesulfonate (MES)-tethered polypyrrole, Nafion and Bi. The PPy-MES interaction was examined by quartz crystal microbalance. Under optimum conditions (5-min preconcentration at -1.2 V vs. SCE in pH 4.0 acetate buffer containing 300 μg L<sup>-1</sup> Bi<sup>3+</sup>), the linear calibration curves ranged from 0.05 to 35 μg L<sup>-1</sup> for Pb <sup>2+</sup> and 0.1 to 25 μg L<sup>-1</sup> for Cd<sup>2+</sup>, respectively, and the limits of detection (S/N = 3, S is the signal and N is the noise level) were 0.03 μg L<sup>-1</sup> for Pb<sup>2+</sup> and 0.04 μg L<sup>-1</sup> for Cd<sup>2+</sup>. This method was successfully applied for Pb<sup>2+</sup> and Cd<sup>2+</sup> analysis in real water samples. ©2013 Elsevier B.V. All rights reserved.
语种：
英文
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An aqueous rechargeable battery based on zinc anode and Na0.95MnO2
作者：
Zhang, Baihe;Liu, Yu;Wu, Xiongwei;Yang, Yaqiong;Chang, Zheng;...
期刊：
Chemical Communications ,2014年50(10):1209-1211 ISSN：1359-7345
通讯作者：
Wen, Zubiao
作者机构：
[Yang, Yaqiong; Liu, Yu; Zhang, Baihe; Chang, Zheng; Wu, Yuping] Fudan Univ, New Energy & Mat Lab, Dept Chem, Shanghai 200433, Peoples R China.;[Yang, Yaqiong; Liu, Yu; Zhang, Baihe; Chang, Zheng; Wu, Yuping] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China.;[Liu, Yu; Zhang, Baihe; Wen, Zubiao] Jiangxi Normal Univ, Coll Chem & Chem Engineer, Nanchang 330022, Peoples R China.;[Wu, Xiongwei; Wu, Yuping] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Wen, Zubiao] J;Jiangxi Normal Univ, Coll Chem & Chem Engineer, Nanchang 330022, Peoples R China.
摘要：
An aqueous rechargeable battery system is assembled by using metallic zinc and Na0.95MnO2 as the negative and positive electrodes, respectively. It is cheap and environmentally friendly, and its energy density is 78 Wh kg-1. Its cycling performance is very good with only 8% capacity loss after 1000 cycles at 4 C between 1 and 2 V. © 2014 The Royal Society of Chemistry.
语种：
英文
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Multiple periodic solutions of a delayed predator-prey model with non-monotonic functional response and stage structure
作者：
Liu, Yingyuan;Zhang, Xiaolan;Zhou, Tiejun*
期刊：
Journal of Biological Dynamics ,2014年8(1):145-160 ISSN：1751-3758
通讯作者：
Zhou, Tiejun
作者机构：
[Zhang, Xiaolan; Liu, Yingyuan; Zhou, Tiejun] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Zhou, Tiejun] H;Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
关键词：
34C25;92B05;multiple periodic solutions;non-monotone functional response;predator-prey system;stage structure
摘要：
The paper studies a periodic and delayed predator–prey system with non-monotonic functional responses and stage structure. In the system, both the predator and prey are divided into immature individuals and mature individuals by two fixed ages. It is assumed that the immature predators cannot attack preys, and the case of the mature predators attacking the immature preys is also ignored. Based on Mawhin's coincidence degree, sufficient conditions are obtained for the existence of two positive periodic solutions of the system. An example is presented to illustrate the feasibility of the main results. © 2014 The Author(s). Published by Taylor & Francis.
语种：
英文
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Thiol-ene chemistry guided preparation of thiolated polymeric nanocomposite for anodic stripping voltammetric analysis of Cd2+ and Pb2+
作者：
Su, Zhaohong;Liu, Ying;Zhang, Yi;Xie, Qingji* ;Chen, Li;...
期刊：
ANALYST ,2013年138(4):1180-1186 ISSN：0003-2654
通讯作者：
Xie, Qingji
作者机构：
[Su, Zhaohong; Liu, Ying; Xie, Qingji; Fu, Yingchun; Zhang, Yi; Huang, Yi; Meng, Yue; Chen, Li; Li, Xuejiao; Ma, Ming; Yao, Shouzhuo] Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ China, Changsha 410081, Hunan, Peoples R China.;[Su, Zhaohong] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Xie, Qingji] H;Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ China, Changsha 410081, Hunan, Peoples R China.
摘要：
We report on the thiol-ene chemistry guided preparation of a novel thiolated polymeric nanocomposite involving polyaniline (PANI), a functionalized thiol, e.g., sulfur-rich 2,5-dimercapto-1,3,4-thiadiazole (DMcT), and multiwalled carbon nanotubes (MWCNTs) for the sensitive differential pulse anodic stripping voltammetric determination of Cd2+ and Pb 2+ on a glassy carbon electrode (GCE). Briefly, the thiol-ene reaction of a thiol with oxidized PANI that was chemically synthesized in the presence of solution-dispersed acidified MWCNTs yielded a thiolated polymeric nanocomposite of thiol-PANI/MWCNTs. The thiols examined include DMcT, 1,6-hexanedithiol and β-mercaptoethanol. Quartz crystal microbalance, cyclic voltammetry, scanning electron microscopy, Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy were used for film characterization and process monitoring. Under the optimized conditions, the obtained Bi/Nafion/DMcT-PANI/MWCNTs/GCE can sensitively sense Cd2+ and Pb2+ with limits of detection of 0.01 and 0.04 μg L -1, respectively. © 2013 The Royal Society of Chemistry.
语种：
英文
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A Novel 2-D Graphical Representation for DNA Sequences Based on the Chemical Properties
作者：
Liu, Yuewu;Peng, Yan*
期刊：
Journal of Computational and Theoretical Nanoscience ,2013年10(9):2102-2105 ISSN：1546-1955
通讯作者：
Peng, Yan
作者机构：
[Liu, Yuewu] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Peng, Yan] Hunan Agr Univ, Crop Gene Engn Key Lab Hunan Prov, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Peng, Yan] H;Hunan Agr Univ, Crop Gene Engn Key Lab Hunan Prov, Changsha 410128, Hunan, Peoples R China.
关键词：
DNA Sequence;Graphical Representation;Numerical Characterization
摘要：
Based on the chemical properties, sixteen combinations are obtained. By allocating these combinations to sixteen different two-component vectors respectively in the Cartesian coordinate system, we present a novel 2-D graphical representation of DNA primary sequences, which can offer more biology information. This approach is not any circuit and has one to one correspondence between DNA sequences and DNA graphs. The examination of similarities/ dissimilarities among the coding sequences of the first exon of --globin gene of different species illustrates the utility of the approach. ©2013 American Scientific Publishers. All rights reserved.
语种：
英文
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Amperometric determination of ascorbic acid using multiwalled carbon nanotube-thiolated polyaniline composite modified glassy carbon electrode
作者：
Liu, Ying;Su, Zhaohong;Zhang, Yi;Chen, Li;Gu, Tiean;...
期刊：
Journal of Electroanalytical Chemistry ,2013年709:19-25 ISSN：1572-6657
通讯作者：
Xie, Qingji
作者机构：
[Huang, Siyu; Liu, Yan; Liu, Ying; Xie, Qingji; Gu, Tiean; Zhang, Yi; Sun, Lingen; Chen, Li; Yao, Shouzhuo] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410087, Hunan, Peoples R China.;[Su, Zhaohong] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Xie, Qingji] H;Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410087, Hunan, Peoples R China.
关键词：
Amperometric sensing of ascorbic acid;Electroactive nanocomposite of thiolated polyaniline at neutral pH;Mercaptosuccinic acid;Multiwalled carbon nanotubes;Polyaniline
摘要：
A new nanocomposite film that is highly electroactive in neutral aqueous solutions was prepared based on multiwalled carbon nanotubes (MWCNTs), polyaniline (PANI) and mercaptosuccinic acid (MSA). Briefly, a glassy carbon electrode (GCE) was firstly cast-coated with MWCNTs (MWCNTs/GCE), PANI was then electrodeposited on MWCNTs/GCE, and finally MSA was tethered to the electrooxidized PANI via the thiol-ene reaction to form MSA-PANI/MWCNTs/GCE. Electrochemical quartz crystal microbalance, scanning electron microscopy, Fourier transform infrared spectroscopy and electrochemical impedance spectroscopy were used for film characterization and process monitoring. The high electroactivity of MSA-PANI/MWCNTs/GCE observed in neutral aqueous solutions is ascribed to the anionic MSA tethered to the PANI backbones as well as the good conductivity and high specific surface area of MWCNTs. The prepared MSA-PANI/MWCNTs/GCE electrode was successfully used for catalytic electroanalysis of ascorbic acid (AA) at neutral pH. Under optimum conditions, the anodic amperometric detection of AA provides a wide linear detection range (20 μM-29.6 mM), a high sensitivity (363 μA mM<sup>-1</sup> cm <sup>-2</sup>) and a low limit of detection (0.6 μM, S/N = 3) as well as good reproducibility and stability, which are superior to many reported AA electrochemical sensors. ©2013 Elsevier B.V. All rights reserved.
语种：
英文
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A new extrapolation cascadic multi-grid method for semi-linear PDEs
作者：
Liu, Yuewu
期刊：
Journal of Computational Information Systems ,2013年9(11):4291-4297 ISSN：1553-9105
通讯作者：
Liu, Y.(yuewu_liu5@yahoo.com.cn)
作者机构：
[Liu, Yuewu] Department of Science, Hunan Agricultural University, Changsha 410128, China
通讯机构：
Department of Science, Hunan Agricultural University, China
关键词：
Extrapolation;Multigrid method;Semilinear PDEs;Superconvergence
摘要：
Based on the asymptotic expansion of the error and super-convergence estimates, some new extrapolation formulas are established. Then a new cascadic multi-grid method for semi-linear PDEs is proposed. Numerical experiments show the efficiency of our approach. ©2013 by Binary Information Press.
语种：
英文
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奇异摄动问题近似解及其加权误差导数的算法
作者：
刘莺;胡剑炜
期刊：
科技信息 ,2012年(31):30+32 ISSN：1001-9960
作者机构：
湖南农业大学理学院 湖南长沙410128;中国移动通信集团湖南有限公司 湖南长沙410015
关键词：
奇异摄动;移动网格;一致收敛
摘要：
针对奇异摄动问题一般的非守恒形式的方程,选用标准迎风差分格式,对控制函数取值为弧长函数的离散形式,采用迭代算法构建移动网格.数值实验证实可得不依赖于摄动参数的收敛结果.
语种：
中文
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信息论基础课程教学优化改革的探讨
作者：
刘莺;胡剑炜
期刊：
科技信息 ,2011年(35):112 ISSN：1001-9960
作者机构：
湖南农业大学理学院信息系 湖南长沙410128;中国移动通信集团湖南有限公司 湖南长沙410015
关键词：
信息论基础;教学内容;教学方法;优化改革
摘要：
本文针对信息论基础课程教学过程中出现的问题,结合该课程特点,在教学内容和教学方法上进行了优化改革的探讨,包括优选教学内容、优化例题和习题、联系工程实际、开设讲座等.教学实践表明这些优化改革有效地提高了教学效果.
语种：
中文
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奇异摄动问题近似解及其加权误差导数的分析
作者：
刘莺
期刊：
湖南文理学院学报(自然科学版) ,2011年23(04):9-12 ISSN：1672-6146
作者机构：
湖南农业大学理学院信息系,湖南长沙,410128;[刘莺] 湖南农业大学
关键词：
奇异摄动问题;迎风差分格式;等分布原理;一致收敛
摘要：
奇异摄动两点边值问题在均匀网格上得不到稳定可靠的数值解,必须构建自适应网格.此网格是通过等分布在一个区域上的控制函数而产生.针对该类问题,一般的非守恒形式的方程选用对方程二阶导数为向前差商的迎风差分格式以及对控制函数取值为弧长函数的离散形式,利用离散格林函数得到不依赖于摄动参数的收敛结果,近似解的误差阶和加权误差导数的阶均为一阶.
语种：
中文
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农业院校学费问题探讨
作者：
刘莺;王访
期刊：
中国科教创新导刊 ,2009年(2):109 ISSN：1673-9795
作者机构：
湖南农业大学理学院,长沙,410128
关键词：
农业院校;学费;问题对策
摘要：
学费问题是农业院校发展进程中需重视的问题.本文分析其所面临的问题及问题产生的背景和现状,提出了解决问题的若干对策.
语种：
中文
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A new criterion to global exponential periodicity for discrete-time BAM neural network with infinite delays
作者：
Zhou, Tiejun* ;Liu, Yuehua;Li, Xiaoping;Liu, Yirong
期刊：
CHAOS SOLITONS & FRACTALS ,2009年39(1):332-341 ISSN：0960-0779
通讯作者：
Zhou, Tiejun
作者机构：
[Liu, Yuehua; Li, Xiaoping; Zhou, Tiejun] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Liu, Yirong; Zhou, Tiejun] Cent S Univ, Sch Math, Changsha 410000, Hunan, Peoples R China.
通讯机构：
[Zhou, Tiejun] H;Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
摘要：
The discrete-time bidirectional associative memory neural network with periodic coefficients and infinite delays is studied. And not by employing the continuation theorem of coincidence degree theory as other literatures, but by constructing suitable Liapunov function, using fixed point theorem and some analysis techniques, a sufficient criterion is obtained which ensures the existence and global exponential stability of periodic solution for the type of discrete-time BAM neural network. The obtained result is less restrictive to the BAM neural networks than previously known criteria. Furthermore, it can be applied to the BAM neural network which signal transfer functions are neither bounded nor differentiable. In addition, an example and its numerical simulation are given to illustrate the effectiveness of the obtained result. © 2007 Elsevier Ltd. All rights reserved.
语种：
英文
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奇异摄动问题向前差商迎风格式移动网格收敛性分析
作者：
刘莺;陈艳萍
期刊：
湘潭大学学报(自然科学学报) ,2009年31(2):8-11 ISSN：2096-644X
作者机构：
[刘莺] 湖南农业大学,理学院;[陈艳萍] 华南师范大学,数学科学学院
关键词：
奇异摄动问题;迎风差分格式;等分布原理;一致收敛性
摘要：
带有指数边界层的奇异摄动两点边值问题能在自适应网格上有效解出.这种网格是通过等分布一个区域上的控制函数而产生.选用对方程两阶导数为向前差商的迎风差分格式,对控制函数M(x)取值为(1+(ε~(-1) e~(-βx/ε))~2)~(1/2),利用离散的格林函数可得不依赖于摄动参数ε的收敛结果,误差阶和加权误差导数的阶均为O(N~(-1)).
语种：
中文
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浅析航空公司的预订票策略
作者：
刘莺;粟莉萍
期刊：
科技创新导报 ,2008年(36):220-221 ISSN：1674-098X
作者机构：
湖南农业大学理学院信息科学系,湖南长沙,410128
关键词：
预订票;收益管理;超售
摘要：
针对航空公司预订票问题,本文研究收益管理,发现基于价格机制、旅客登机率、赔偿费用以及顾客满意度的超售票策略能使预订票业务达最佳效率。
语种：
中文
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Global exponential periodicity for BAM neural network with periodic coefficients and continuously distributed delays
作者：
Zhou, Tiejun* ;Liu, Yuehua;Li, Xiaoping;Liu, Yirong
期刊：
Computers & Mathematics with Applications ,2008年55(11):2689-2698 ISSN：0898-1221
通讯作者：
Zhou, Tiejun
作者机构：
[Liu, Yuehua; Li, Xiaoping; Zhou, Tiejun] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Liu, Yirong; Zhou, Tiejun] Cent S Univ, Sch Math, Changsha 410000, Hunan, Peoples R China.
通讯机构：
[Zhou, Tiejun] H;Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
关键词：
BAM neural network;Continuously distributed delay;Global exponential stability;Lyapunov function;Periodic solution
摘要：
By constructing a suitable Lyapunov function and using some analysis techniques, rather than employing the continuation theorem of coincidence degree theory as in other literature, a sufficient criterion is obtained to ensure the existence and global exponential stability of periodic solution for the bidirectional associative memory neural network with periodic coefficients and continuously distributed delays. The obtained result is less restrictive to the BAM neural network than the previously known criteria. And it can be applied to the BAM neural network in which signal transfer functions are neither bounded nor differentiable. In addition, an example and its numerical simulation are given to illustrate the effectiveness of the obtained result. © 2007 Elsevier Ltd. All rights reserved.
语种：
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The existence of positive solution and bounded oscillation for even-order neutral differential equations with unstable type
作者：
Li, Xiaoping* ;Liu, Yuehua;Zhou, Tiejun
期刊：
Applied Mathematics and Computation ,2006年176(2):632-641 ISSN：0096-3003
通讯作者：
Li, Xiaoping
作者机构：
[Liu, Yuehua; Li, Xiaoping; Zhou, Tiejun] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Li, Xiaoping] H;Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
关键词：
neutral differential equation;unbounded solution;bounded oscillation
摘要：
In this paper, we consider the n-order neutral delay differential equation with unstable type ((x(t) - p(t)x(t - tau))((n)) = q(t)vertical bar x(t - sigma)vertical bar(alpha-1)x(t - sigma), t >= t(0), where n >= 2 is an even integer, alpha >= 1, tau > 0, sigma > 0 and p, q is an element of C([t(0), +infinity], R+). We first prove that this equation always has an unbounded positive solution, then some new bounded oscillation and nonoscillation criteria are obtained. (c) 2005 Elsevier Inc. All rights reserved.
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