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Optimal Decoupling Control Method and Its Application to a Ball Mill Coal-pulverizing System

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IEEE/CAA Journal of Automatica Sinica 2018年第6期5卷 1035-1043页

作者： yue fu Chengwen Hong Jingyi Li State Key Laboratory of Synthetical Automation for Process Industries Northeastern University

Abstract-The conventional optimal tracking control method cannot realize decoupling control of linear systems with a strong coupling property. To solve this problem, in this paper, an optimal decoupling control method is proposed, which can simultaneousiy provide optimal performance. The optimal decoupling controller is composed of an inner-loop decoupling controller and an outer-loop optimal tracking controller. First, by introducing one virtual control variable, the original differential equation on state is converted to a generalized system on output. Then, by introducing the other virtual control variable, and viewing the coupling terms as the measurable disturbances, the generalized system is open-loop decoupled. Finally, for the decoupled system, the optimal tracking control method is used. It is proved that the decoupling control is optimal for a certain performance index. Simulations on a ball mill coal-pulverizing system are conducted. The results show the effectiveness and superiority of the proposed method as compared with the conventional optimal quadratic tracking （LQT） control method.

关键词： Ball mill coal-pulverizing system linear system,optimal decoupling control optimal quadratic tracking (LQT)control.

Quantum public-key crypto via EPR pairs

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 58-63页

作者： Xiang-Qun fu Hong-Wei Li Jian-Hong Shi Tan Li Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography Information Engineering University Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China

With the development of quantum computing technology, quantum public-key cryptography is gradually becoming an alternative to the existing classical public-key cryptography. This paper designs a quantum trapdoor one-way function via EPR pairs and quantum measurements. Based on this, a new quantum public-key cryptosystem is presented, which offers forward security,and can resist the chosen-plaintext attack and chosen-ciphertext attack. Compared with the existing quantum public-key cryptos,eavesdropping can be automatically detected in this new quantum public-key cryptosystem under a necessary condition, which is also detailed in the paper.

关键词： quantum public-key crypto trapdoor one-way function EPR pairs

Preparation and thermal stability of Pd_(40.5)Ni_(40.5)Si_xP_(19-x) bulk metallic glasses

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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 204-207页

作者： Yang Li yao-cen Wang Ke-fu yao Department of Mechanical Engineering Tsinghua University Beijing 100084 China

With the addition of Si to replace some P,Pd40.5Ni40.5SixP19-x（x=0,2.5,5,9.5,14,and 19 in atomic number fraction） bulk glassy samples with the diameter of about 5 mm were successfully prepared by use of flux treatment and water quenching *** the increase of Si content,the glass forming ability of Pd40.5Ni40.5Si-xP19-x increases first for low Si content and then decreases for high Si content （Si≥9.5at%）.The Pd40.50Ni40.5Si5P14 glassy alloy possesses the largest supercooled liquid region△T of 119 K,the largest reduced glass transition temperature of 0.621,and the largestγparameter of 0.460,indicating that this glassy alloy possesses very large glass forming ability and very high thermal stability.

关键词： bulk metallic glass flux method glass forming ability water quenching thermal stability

Numerical simulation of polygonal particles moving in incompressible viscous fluids

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Particuology 2017年第2期15卷 140-151页

作者： Xiaowu fu Zhaohui yao Xiwen Zhang Department of Engineering Mechanics Tsinghua University Beijing 100084 China

A two-dimensional coupled lattice Boltzmann immersed boundary discrete element method is introduced for the simulation of polygonal particles moving in incompressible viscous fluids. A collision model of polygonal particles is used in the discrete element method. Instead of a collision model of circular particles, the collision model used in our method can deal with particles of more complex shape and efficiently simulate the effects of shape on particle–particle and particle–wall interactions. For two particles falling under gravity, because of the edges and corners, different collision patterns for circular and polygonal particles are found in our simulations. The complex vortexes generated near the corners of polygonal particles affect the flow field and lead to a difference in particle motions between circular and polygonal particles. For multiple particles falling under gravity, the polygonal particles easily become stuck owing to their corners and edges, while circular particles slip along contact areas. The present method provides an efficient approach for understanding the effects of particle shape on the dynamics of non-circular particles in fluids.

关键词： Polygonal particle Particle-fluid interaction Lattice Boltzmann method Immersed boundary method Discrete element method

Effective conversion of cellobiose and glucose to sorbitol using non-noble bimetallic NiCo/HZSM-5 catalyst

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Science China Chemistry 2018年第9期61卷 1167-1174页

作者： Bakht Zada Long Yan yao fu Hefei National Laboratory for Physical Science at the Microscale Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) CAS Key Laboratory of Urban Pollutant Conversion Anhui Province Key Laboratory for Biomass Clean Energy and Department of Chemistry University of Science and Technology of China

The tandem hydrolysis and hydrogenation of saccharides into sorbitol is an especially attractive reaction in the conversion of biomass. Here, an economical and efficient bimetallic catalyst for the transformation of glucose and cellobiose into sorbitol is reported. Non-precious metal based catalysts such as NiCo, Ni, and Co, were prepared via modified impregnation method, and NiCo/HZSM-5 showed superior performance for the synthesis of sorbitol(86.9% from cellobiose, 98.6% from D-glucose).Various characterizations, such as Brunner-Emmet-Teler(BET), X-ray diffraction(XRD), transmission electron microscopy(TEM) and X-ray photoelectron spectroscopy(XPS), confirmed that NiCo alloy formed and highly dispersed in NiCo/HZSM-5 catalyst. The high performance of fabricated catalyst would be attributed to the formation of nickel-cobalt alloy over HZSM-5 zeolite surface. High temperature and H_2 pressure were favorable for the tandem hydrolysis and hydrogenation reaction. Besides,the reaction pathway was also proposed based on the kinetics study. Cellobitol was detected as the intermediate in the reaction mixture. furthermore, in the catalytic stability study, it was found that active metal species of NiCo/HZSM-5 were stable. The deactivation of catalyst would be due to the covering of acidic sites over NiCo/HZSM-5.

关键词： biomass sorbitol glucose cellobiose bimetallic catalyst

On Gorenstein coalgebras

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Frontiers of Mathematics in China 2016年第4期11卷 845-867页

作者： Xuerong fu Hailou yao College of Applied Sciences Beijing University of Technology Beijing 100124 China

We investigate the comodule representation category over the Morita-Takeuchi context coalgebra F and study the Gorensteinness of F. Moreover, we determine explicitly all Gorenstein injective comodules over the Morita-Takeuchi context coalgebra F and discuss the localization in Gorenstein coalgebras. In particular, we describe its Gabriel quiver and carry out some examples when the Morita-Takeuchi context coalgebra is basic.

关键词： Gorenstein coalgebra Gorenstein injective comodule Gabriel quiver

A Three-Dimensional (3D) Environment to Maintain the Integrity of Mouse Testicular Can Cause the Occurrence of Meiosis

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Journal of Integrative Agriculture 2013年第8期12卷 1481-1488页

作者： CHU Zhi-li LIU Chao BAI yao-fu ZHU Hai-jing HU yue HUA Jin-lian College of Veterinary Medicine Shaanxi Center of Stem Cells Engineering & Technology/Key Lab for Animal BiotechnologyMinistry of Agriculture/Northwest A&F University

Adhesions between different cells and extracellular matrix have been studied extensively in vitro, but little is known about their functions in testicular tissue counterparts. Spermatogonia and their companion somatic cells maintain a close association throughout spermatogenesis and this association is necessary for normal spermatogenesis. In order to keep the relative integrity of the testicular tissues, and to detect the development in vitro, culture testicular tissues in a three- dimensional （3D） agarose matrix was examined. Testicular tissues isolated from 6.5 d postpartum （dpp） mouse were cultured on the top of the matrix for 26 d with a medium height up to 4/5 of the 3D agarose matrix. The results showed that in this 3D culture environment, each type of testicular cells kept the same structure, localization and function as in vivo and might be more biologically relevant to living organisms. After culture, germ cell marker VASA and meiosis markers DAZL and SCP3 showed typical positive analysed by immunofluorescence staining and RT-PCR. It demonstrated that this 3D culture system was able to maintain the number of germ cells and promote the meiosis initiation of male germ cells.

关键词： three-dimensional culture (3D) meiosis organ culture mouse

A Study of Pt^(4+)Adsorption and Its Reduction by Bacillus Megaterium D01

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Chemical Research in Chinese Universities 2000年第3期16卷 246-249页

作者： LIU yue ying fu Jin kun ZHOU Zhao hui YU Xin sheng yao Bing xin Department of Biology Department of Chemistry Xiamen UniversityXiamen 361005P.R.China

The properties of Pt 4+ adsorption and its reduction by Bacillus megaterium D01 were studied by means of ICP, anode stripping voltammetry, TEM, IR and XPS. The results of ICP analyses showed that the Pt 4+ adsorptive efficiency of the strain D01 was as high as 94.3% under the conditions of 100 mg Pt 4+ /L, 1 g biomass/L, pH 3.5 and at 30 ℃ for 24 h. Moreover, it was confirmed from anode stripping voltammetry that the strain D01 possessed a strong reducibility. The TEM analysis indicated that the strain D01 was able to adsorb and reduce Pt 4+ to Pt 0, small particles. The XPS result further supported the reduction of Pt 4+ to Pt 2+ , followed by the further recuction to Pt 0. The IR spectrum implied that D01 biomass adsorption of Pt 4+ may result in the complexation of the CO bond to the Pt species.

关键词： Biosorption Bioreduction Platinum Bacillus megaterium

Intermediate symmetric construction of transformation between anyon and Gentile statistics

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Communications in Theoretical Physics 2021年第6期73卷 126-130页

作者： yao Shen fu-Lin Zhang School of Criminal Investigation People's Public Security University of ChinaBeijing 100038China Department of Physics School of ScienceTianjin UniversityTianjin 300072China

Gentile statistics describes fractional statistical systems in the occupation number *** statistics researches those systems in the winding number *** of them are intermediate statistics between Bose–Einstein and Fermi–Dirac *** second quantization of Gentile statistics shows a lot of *** to the symmetry requirement of the wave function and the property of braiding,we give the general construction of transformation between anyon and Gentile *** other words,we introduce the second quantization form of anyons in an easier *** construction is a correspondence between two fractional statistics and gives a new description of *** relations of second quantization operators,the coherent state and Berry phase are also discussed.

关键词： gentile statistics anyon fractional statistics computational method