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The Modulus-Based Levenberg-Marquardt Method for Solving Linear Complementarity Problem

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Numerical Mathematics(Theory,Methods and Applications) 2019年第1期12卷 154-168页

作者： baohua huang Changfeng Ma College of Mathematics and Informatics Fujian Key Laborotary of Mathematical Analysis and ApplicationsFujian Normal UniversityFuzhou 350117P.R.China

As applying the Levenberg-Marquardt method to the reformulation of linear complementarity problem,a modulus-based Levenberg-Marquardt method with non-monotone line search is established and the global convergence result is *** experiments show that the proposed method is efficient and outperforms the modulus-based matrix splitting iteration method.

关键词： Linear complementarity problem modulus-based Levenberg-Marquardt method glob-al convergence numerical experiments

Meet-Cloud for Secure and Accurate Distribution of Negative Messages in Vehicular Ad hoc Network

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Tsinghua Science and Technology 2018年第4期23卷 377-388页

作者： baohua huang Xiaolu Cheng Caixia huang Wei Cheng School of Computer and Electronic Information Guangxi University Nanning 530004 China Department of Computer Science Virginia Commonwealth University Richmond VA 23220 USA School of Computer Engineering and Applied Mathematics Changsha University Changsha 410003 China

Keeping Vehicular Ad hoc Network （VANET） from attacks requires secure and efficient distribution of information about bad entitles. Negative messages are pieces of information that define the negative attributes of vehicles. By formally defining the negative message, we observe that accuracy is essential for its efficient distribution. We formally define the coverage percentage and accurate coverage percentage to describe the availability and distribution efficiency of negative message. These two metrics can jointly evaluate the performance of a distribution method. To obtain both high coverage percentage and high accurate coverage percentage, we propose meet-cloud, a scheme based on meet-table and cloud computing to securely and accurately distribute negative messages in VANET. A meet-table in a Road Side Unit （RSU） records the vehicles it encounters. All meet- tables are sent to cloud service to aggregate a global meet-table. The algorithm for distributing and redistributing negative messages are designed. Security analysis shows that meet-cloud is secure against fake and holding on to negative message attacks. Simulations and analysis demonstrate that meet-cloud is secure under denial of service and fake meet-table attacks. The simulation results also justify that meet-cloud outperforms the RSU broadcast and epidemic model.

关键词： negative message accurate coverage percentage meet-table VANET cloud computing

Theoretical studies of C_(36) encapsulated in zigzag single-wall carbon nanotubes

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Chinese Science Bulletin 2006年第1期51卷 25-30页

作者： YANG baohua WANG Yang huang Yuanhe Department of Chemistry Beijing Normal University Beijing 100875China

The one-dimensional hybrid structures of C36 encapsulated in zigzag single-wall carbon nanotubes (C36@(n,0)) have been investigated using ab initio self-consistent-field crystal orbital method based on the density functional theory. The research focuses on the change of geometric and band struc- tures for the nanotubes upon C36 encapsulation. The obtained results show that the introduction of C36 can modify the electronic properties of CNT. The diameter of carbon nanotube plays an important role in the geometric and electronic properties of the peapod structures.

关键词：碳纳米管理论研究制备密度功能理论

Workload-based randomization byzantine fault tolerance consensus protocol

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High-Confidence Computing 2022年第3期2卷 24-30页

作者： baohua huang Li Peng Weihong Zhao Ningjiang Chen School of Computer and Electronic Information Guangxi UniversityNanningChina

This paper introduces a new Byzantine fault tolerance protocol called workload-based randomization Byzantine fault tolerance protocol(WRBFT).Improvements are made to the Practical Byzantine Fault Tolerance(PBFT),which has an important position in the Byzantine Fault consensus *** PBFT has numerous ad-vantages,its primary node selection mechanism is overly fixed,the communication overhead of the consensus process is also high,and nodes cannot join and exit *** solve these problems,the WRBFT proposed in this paper combines node consensus workload and verifiable random function(VRF)to randomly select the more reliable primary node that dominates the *** selection of the nodes involved in the consensus is based on the node workload,and the optimization of the agreement protocol of the PBFT is also based on *** results show that the WRBFT has higher throughput,lower consensus latency,and higher algorithmic efficiency compared to the PBFT.

关键词： Blockchain Consensus algorithm BFT PBFT Verifiable random function

Ionic liquid mediated esterification of alcohol with acetic acid

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Frontiers of Chemical Science and Engineering 2009年第2期3卷 211-214页

作者： Beilei ZHOU Yanxiong FANG Hao GU Saidan ZHANG baohua huang Kun ZHANG Faculty of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510090China

Highly efficient esterification of alcohols with acetic acid by using a Brønsted acidic ionic liquid,i.e.,1-methyl-2-pyrrolidonium hydrogen sulfate([Hnmp]HSO_(4)),as catalyst has been *** turnover numbers(TON)were able to reach up to 11000 and turnover frequency(TOF)was *** catalytic system is suitable for the esterification of long chain aliphatic alcohols,benzyl alcohol and cyclohexanol with good yields of *** procedure of separating the product and catalyst is simple,and the catalyst could be reused.[Hnmp]HSO_(4) had much weaker corrosiveness than H_(2)SO_(4).The corrosive rate of H_(2)SO_(4) was 400 times more than that of[Hnmp]HSO_(4) to stainless steel.

关键词： ionic liquid Brønsted acid esterification catalyst

PeerMD:A P2P Molecular Dynamics Simulation Framework Based on Web Services

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Wuhan University Journal of Natural Sciences 2008年第4期13卷 471-474页

作者： huang baohua HE Lin BAO Yang LI Zhuoya LI Ruixuan School of Basic Medical Sciences Huazhong University of Science and Technology Wuhan 430030 Hubei China College of Computer Science and Technology HuazhongUniversity of Science and Technology Wuhan 430074 HubeiChina

PeerMD, a P2P molecular dynamics simulation frame-work based on Web services is proposed. It utilizes rich free CPU time and network bandwidth of P2P networks to provide enough resources for dynamics simulation of bio-macromolecule, and has resolved the problem that it is difficult to interoperate between heterogeneous peers in P2P environment through Web services. Structure of PeerMD is given. Function, input and output of molecular dynamics simulation Web service are defined. Processes of publishing, discovering and invoking of molecular dynamics simulation Web service based on multi-level SuperPeer are given. A protocol system of PeerMD is implemented on a basic P2P platform JXTA, and experimental simulations of tumor necrosis fact alpha （TNF-α） and two mutations of it are executed on the protocol system. Simulation results show that PeerMD can speed up molecular dynamics simulation perfectly.

关键词： P2P Web services molecular dynamics

Trust Degree of Web Services and Its Evaluation with Neural Network

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Wuhan University Journal of Natural Sciences 2006年第5期11卷 1302-1305页

作者： huang baohua HU Heping LU Zhengding YAO Hanbing LI Ruixuan College of Computer Science and Technology HuazhongUniversity of Science and Technology Wuhan 430074Hubei China

The concept and definition of trust degree of Web service is given. Evaluating trust degree of Web services with the method of neural network from the aspect of trust history sequence is proposed. The principle of the method, applicable neural network structure, neural network construc ting, input standardization, training sample constructing, and the procedure of evaluating trust degree of Web services with trained neural network are described. Experiments show that it is feasible and effective to evaluate trust degree of Web Service with neural network.

关键词： Web services trust degree neural network

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基于欠抽样技术的软件单边带接收机

电信科学 1998年第2期14卷 20-22页

作者：黄葆华南京通信工程学院无线教研室

理想的软件单边带接收机应该是对射频信号直接进行抽样，在通用数字信号处理器（ＤＳＰ）中用软件完成单边带接收机的所有功能。但是，由于ＤＳＰ速度的限制，目前对无线电接收机的软件化还只局限于中频。本文在讨论了欠抽样技术在软件... 详细信息

理想的软件单边带接收机应该是对射频信号直接进行抽样，在通用数字信号处理器（ＤＳＰ）中用软件完成单边带接收机的所有功能。但是，由于ＤＳＰ速度的限制，目前对无线电接收机的软件化还只局限于中频。本文在讨论了欠抽样技术在软件单边带接收机中的应用的基础上，提出了一种对中频信号直接采样的软件单边带接收机的软硬件实现方案。

关键词：欠抽样技术软件单边带接收机无线电台

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宋代词学视域中的李清照《词论》

上海师范大学学报（哲学社会科学版） 2008年第2期37卷 48-55页

作者：黄宝华上海师范大学人文与传播学院上海200234

《词论》是宋代著名词人李清照仅存的一篇词学论文,历来对它评析甚多,颇有歧见。文章将李清照的《词论》置于宋代词学流变的大背景下加以考察,力图揭示出它的内涵及其在词学史上的地位。词体文学进入宋代以后,其发展表现为一种雅化的进... 详细信息

《词论》是宋代著名词人李清照仅存的一篇词学论文,历来对它评析甚多,颇有歧见。文章将李清照的《词论》置于宋代词学流变的大背景下加以考察,力图揭示出它的内涵及其在词学史上的地位。词体文学进入宋代以后,其发展表现为一种雅化的进程,或称之为"诗化"。但在这一进程中也出现了突破过甚而疏离词之本位的倾向。李清照既认同词的雅化,又不赞同因雅化而背弃词的本质特征,其关注的焦点则是词的合律可歌的音乐性本位。正因为李清照的这一词本体论蕴涵了上述的两个向度,故其词学观不能以"婉约"与"豪放"的两分法加以概括。文章最后探讨了周邦彦为何不被李清照置评的原因,因周词虽恪守音律,格调典雅,但其词品仍不能免俗所致。李清照对周的这一态度也表达了她的词学思想的一贯性。

关键词：李清照《词论》雅化词乐周邦彦姜夔