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Wiener model identification and nonlinear model predictive control of a pH neutralization process based on Laguerre filters and least squares support vector machines

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第1期12卷 25-35页

作者： Qing-chao WAnG jian-zhong ZHAnG School of Energy Science and Engineering Harbin Institute of Technology Harbin 150001 China SInOPEC Safety Engineering Institute Qingdao 266071 China

This paper deals with Wiener model based predictive control of a pH neutralization *** dynamic linear block of the Wiener model is parameterized using Laguerre filters while the nonlinear block is constructed using least squares support vector machines (LSSVM).Input-output data from the first principle model of the pH neutralization process are used for the Wiener model *** results show that the proposed Wiener model has higher prediction accuracy than Laguerre-support vector regression (SVR) Wiener models,Laguerre-polynomial Wiener models,and linear Laguerre *** identified Wiener model is used here for nonlinear model predictive control (nMPC) of the pH neutralization *** set-point tracking performance of the proposed nMPC is compared with those of the Laguerre-SVR Wiener model based nMPC,Laguerre-polynomial Wiener model based nMPC,and linear model predictive control (LMPC).Validation results show that the proposed nMPC outperforms the other three controllers.

关键词： Wiener model nonlinear model predictive control (nMPC) pH neutralization process Laguerre filters Least squares support vector machines (LSSVM)

QoE-Driven Social Aware Caching Placement for Terrestrial-Satellite networks

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China Communications 2018年第10期15卷 60-72页

作者： Guiting zhong jian y.n Linling Kuang Tsinghua Space Center Tsinghua University Beijing 100084 China Beijing national Research Center for Information Science and Technology China

In remote terrestrial-satellite networks, caching is a very promising technique to alleviate the burden of space cloudlet(e.g., cache-enabled satellite user terminal) and to improve subscribers' quality of experience(Qo E) in terms of buffering delay and achievable video streaming rate. In this paper, we studied a Qo E-driven caching placement optimization problem for video streaming that takes into account the required video streaming rate and the social relationship among users. Social ties between users are used to designate a set of helpers with caching capability, which can cache popular files proactively when the cloudlet is idle. We model the utility function of Qo E as a logarithmic function. Then, the caching placement problem is formulated as an optimization problem to maximize the user's average Qo E subject to the storage capacity constraints of the helpers and the cloudlets. Furthermore, we reformulate the problem into a monotone submodular optimization problem with a partition matroid constraint, and an efficient greedy algorithm with 1-1 e approximation ratio is proposed to solve it. Simulation results show that the proposed caching placement approach significantly outperforms the traditional approaches in terms of Qo E, while yields about the same delay and hit ratio performance compare to the delay-minimized scheme.

关键词： quality of experience (QoE) caching placement terrestrial-satellite networks submodular optimization social awareness

Generalized braided Hopf algebras

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Applied Mathematics(A Journal of Chinese Universities) 2009年第1期24卷 105-113页

作者： LU zhong-jian FAnG Xiao-li Department of Mathematics Shaoxing College of Arts and Sciences Shaoxing 312000 China

The concept of （f, σ）-pair （B, H）is introduced, where B and H are Hopf algebras. A braided tensor category which is a tensor subcategory of the category ^HM of left H-comodules through an （f, σ）-pair is constructed. In particularly, a y.ng-Baxter equation is got. A Hopf algebra is constructed as well in the yetter-Drinfel＇d category H^HyD by twisting the multiplication of B.

关键词： (f, σ )-pair yetter-Drinfel’d modules category braided Hopf algebra

The limit of the Boussinesq system of Rayleigh-Bénard convection as the Prandtl number approaches infinity

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Applied Mathematics(A Journal of Chinese Universities) 2011年第4期26卷 493-502页

作者： SHI jian-guo WU zhong-lin Department of Mathematics Huanghuai University Zhumadian 463000 China

Benard convection is studied by the asymptotic expansion methods of singular perturbation theory and the classical energy methods. For ill-prepared initial data, an exact approximating 1 solution with expansions up to any order are given and the convergence rates O（εm＋1/2）and the optimal convergence rates O（εm＋1） are obtained respectively. This improves the result of J.G. SHI.

关键词： Infinite Prandtl number limitl Rayleigh-Benard convection Boussinesq system asymptotic expansions singular perturbation classical energy methods.

Microbial Degradation of Aniline by Bacterial Consortium

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Biomedical and Environmental Sciences 2003年第4期16卷 398-404页

作者： jian-LOnGWAnG ZE-yUMAO WEI-zhong LaboratoryofEnvironmentalTechnology INETTsinghuaUniversityBeifing100084China DepartmentofHydraulicEngineering TsinghuaUniversityBeijing100084China SchoolofEnvironmentalScience PekingUniversityBeijing100871China

Objective To investigate the characteristics of microbial degradation of aniline by a stable bacterial consortium. Methods The bacterial consortium was isolated from activated sludge treating chemical wastewater using aniline as the sole source of carbon and nitrogen by enrichment and isolation technique. The biomass was measured as optical density (OD) at 510 run using a spectrophotometer. Aniline concentrations were determined by spectrophotometer. The intermediates of aniline degradation were identified by GC/MS method. Results The bacterial consortium could grow at a range of aniline concentrations between 50 and 500 mg/L. The optimal pH and temperature for aniline degradation were determined to be 7.0 and 30, respectively. The presence of nH4nO3 as an additional nitrogen source (100-500 mg/L) had no adverse effect on bacterial growth and aniline degradation. The presence of heavy metal ions, such as Co2+, Zn2+, ni2+, Mn2+ and Cu2+ had an inhibitory effect on aniline degradation. Conclusions The isolated bacterial consortium can degrade aniline up to 500 mg/L effectively and tolerate some heavy metal ions that commonly exist in chemical wastewater. It has a potential to be applied in the practical treatment of aniline-containing wastewater.

关键词： Aniline Priority pollutant Biodegradation Wastewater treatment

novel Global Optimization Algorithm with a Space-Filling Curve and Integral Function

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Journal of the Operations Research Society of China 2021年第3期9卷 619-640页

作者： zhong-yu Wang y.ng-jian y.ng Department of Mathematics Shanghai UniversityShanghai 200444China

In this study,we consider the global optimization problem in a *** use a class of series to construct a curve in a hypercube,which can fill the hypercube,and we present an integral function on the *** on the integral function,we propose an algorithm for solving the global optimization ***,we perform a convergence analysis and numerical experiments to demonstrate the effectiveness of the proposed algorithm.

关键词： Global optimization algorithm Integral function Space-filling curve Filled function

Design of new format for mass data compression

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The Journal of China Universities of Posts and Telecommunications 2011年第1期18卷 121-128页

作者： QIn jian-cheng BAI zhong-y.ng School of Computer Science Beijing University of Posts and Telecommunications Beijing 100876 China

In the field of lossless compression, most kinds of traditional software have some shortages when they face the mass data. Their compressing abilities are limited by the data window size and the compressing format design. This paper presents a new design of compressing format named ＇CZ format＇ which supports the data window size up to 4 GB and has some advantages in the mass data compression. Using this format, a compressing shareware named ＇ComZip＇ is designed. The experiment results support that ComZip has better compression ratio than WinZip, Bzip2 and are compressed. And ComZip has the potential to beat 7-zip in WinRAR in most cases, especially when GBs or TBs of mass data future as the data window size exceeds 128 MB.

关键词： mass data coding tossless compression LZ77/LZSS algorithm arithmetic coding

Computing Degree of Maps Between Manifolds

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1277-1284页

作者： y.n Hong DInG jian zhong PAn Department of Mathematics Hebeg Normal University Shijiazhuang 050016 P. R. China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 P. R. China

We determine the degrees of maps between two given closed （n-1）-connected 2n-mamifolds when n ≡ 1 （mod 8）.

关键词： 2n-manifolds degree

OPTIMIZED DESIGn OF HyDRAULIC COnTROL PATTERn OF SynCHROnOUS SySTEM In LARGE SCALE DIE-FORMInG HyDRAULIC PRESS

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Transactions of nonferrous Metals Society of China 1996年第1期6卷 125-129,140页

作者： Tan jianping zhong Jue y.n jian Department of Mechanical Engineering Central South University of Technology 410083

The hydraulic control mode of the synchronous system in Chinese-built 300 Mn dieforming hydraulic press was analysed *** improve the deficiency of the existing system,a series investigations were put forward,such as the controlling of inclination angular-velocity,the pre-estimating of compensation,the synchronous cylinder's pressure signal protection,ratio pressure control and changing flow control etc,to increase the system's control accuracy and reliability greatly.

关键词： synchronous system hydraulic control optimization