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An advanced discrete‐time RNN for handling discrete time‐varying matrix inversion:Form model design to disturbance‐suppression analysis

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CAAI Transactions on Intelligence Technology 2023年第3期8卷 607-621页

作者： Yang Shi Qiaowen Shi Xinwei Cao Bin Li Xiaobing Sun Dimitrios K.Gerontitis School of Information Engineering Yangzhou UniversityYangzhouChina Jiangsu Province Engineering Research Center of Knowledge Management and Intelligent Service Yangzhou UniversityYangzhouChina School of Business Jiangnan UniversityWuxiChina Department of Information and Electronic Engineering International Hellenic UniversityThessalonikiGreece

Time‐varying matrix inversion is an important field of matrix research,and lots of research achievements have been *** the process of solving time‐varying matrix inversion,disturbances inevitably exist,thus,a model that can suppress disturbance while solving the problem is *** this paper,an advanced continuous‐time recurrent neural network(RNN)model based on a double integral RNN design formula is pro-posed for solving continuous time‐varying matrix inversion,which has incomparable disturbance‐suppression *** digital hardware applications,the corresponding advanced discrete‐time RNN model is proposed based on the discretisation *** a result of theoretical analysis,it is demonstrated that the advanced continuous‐time RNN model and the corresponding advanced discrete‐time RNN model have global and exponential convergence performance,and they are excellent for suppressing different ***,inspiring experiments,including two numerical experiments and a practical experiment,are presented to demonstrate the effectiveness and superiority of the advanced discrete‐time RNN model for solving discrete time‐varying matrix inversion with disturbance‐suppression.

关键词： neural control neural network real‐time systems

Left-Symmetric Algebra Structures on the Planar Galilean Conformal Algebra

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Algebra Colloquium 2019年第2期26卷 285-308页

作者： Lili Chi Jiancai Sun Department of Mathematics Shanghai University Shanghai 200444 China

In this paper, we mainly determine the compatible left-symmetric algebra structures on the planar Galilean conformal algebra with some natural grading conditions. The results of earlier work on left-symmetric algebra structures on the twisted Heisenberg-Virasoro algebra play an important role in determining these compatible structures. As a corollary, any such left-symmetric algebra contains an infinite-dimensional non-trivial subalgebra that is also a submodule of the regular module.

关键词： planar Galilean conformal algebra twisted Heisenberg-Virasoro algebra leftsymme trie algebra

Synthesis and Structure of a New Dinuclear Tungsten(I) Compound with Phenylselenol Ligand,[W_2(SePh)_2(CO)_6(MeCN)_2]

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1039-1042页

作者： ZHOU Zhang-Feng ZHUANG Bo-Tao WU Ke-Chen YAO Yuan-Gen State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The reaction of Et4NCI, C6H5SeNa and W（CO）6 in MeCN afforded a new dinuclear tungsten（Ⅰ） complex W2（SePh）2（CO）6（MeCN）2 1 （Mr = 929.98）. The crystal structure has been determined by X-ray single-crystal diffraction. 1 Crystallizes in monoclinic, space group P2 1/n with a = 7.501（1）, b = 18.387（2）, c = 9.491（1） A,β= 103.897（2）°, V= 1270.6（3） A^3, Z = 2, Dc = 2.431 g/cm^3, μ = 119.50 cm^-1, F（000） = 852, R = 0.0695 and wR = 0.1724 for 2220 independent reflections with 1 〉 2σ（I）. The X-ray structure analysis reveals that the W2Se2 core of 1 is planar with W-W bond length of 3.0433（13） A and W-Se of 2.5922（17）A.

关键词： tungsten(I)-eompound synthesis structure IR spectra

Theoretical Study on the Mechanism of Sonogashira Coupling Reaction

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Chinese Journal of Structural Chemistry 2008年第11期27卷 1404-1411页

作者：陈丽萍洪三国候豪情 Department of Chemistry College of ScienceNanchang University Department of Chemistry College of Basic ScienceEast China Jiaotong University College of Chemistry and Chemical Engineering Jiangxi Normal University

The mechanism of palladium-catalyzed Sonogashira cross-coupling reaction has been studied theoretically by DFT （density functional theory） calculations. The model system studied consists of Pd（PH3）2 as the starting catalyst complex, phenyl bromide as the substrate and acetylene as the terminal alkyne, without regarding to the co-catalyst and base. Mechanistically and energetically plausible catalytic cycles for the cross-coupling have been identified. The DFT analysis shows that the catalytic cycle occurs in three stages： oxidative addition of phenyl bromide to the palladium center, alkynylation of palladium（Ⅱ） intermediate, and reductive elimination to phenylacetylene. In the oxidative addition, the neutral and anionic pathways have been investigated, which could both give rise to cis-configured palladium（Ⅱ） diphosphine intermediate. Starting from the palladium（Ⅱ） diphosphine intermediate, the only identifiable pathway in alkynylation involves the dissociation of Br group and the formation of square-planar palladium（Ⅱ） intermediate, in which the phenyl and alkynyl groups are oriented cis to each other. Due to the close proximity of phenyl and alkynyl groups, the reductive elimination of phenylacetylene proceeds smoothly.

关键词： palladium Sonogashira cross-coupling reaction DFT calculations mechanism

Syntheses and Crystal Structures of Bis-[oxo-bis(p-ferrocenylbenzoxy di-n-propyltin)](I) and Bis[oxo-bis(β-ferrocenoylpropionyloxy di-n-propyltin )](II)

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Chinese Journal of Structural Chemistry 2003年第6期22卷 647-652页

作者： PENG Bin SUN Li-Juan CHANG Wei-Xing XIE Qing-Lan② (National Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China) Nankai University National Key Laboratory of Elemento-Organic Chemistry 天津 300071

Bis-[oxo-bis(p-ferrocenylbenzoxy di-n-propyltin)] I and bis-[oxo-bis(-ferrocenoyl- propionyloxy di-n-propyltin)] II were synthesized and their crystal structures have been determined by X-ray diffraction analysis. The compound I2C6H6 ([(FcC6H4COOSnPr2)2O]22C6H6 or C92H108Fe4O10Sn42C6H6, Mr = 2384.16) is of triclinic, space group P?with a = 12.826(4), b = 13.099(5), c = 17.539(5) ? = 78.229(5), ?= 71.852(5), = 62.746(5)? V = 2483(1) ?, Z = 1, Dc = 1.490 g/cm3, = 0.71073 ? (MoK? =1.611 mm-1 and F(000) = 1128. The structure was refined to R = 0.0491 and wR = 0.1053 for 4690 unique reflections with I > 2(I). The compound IIC6H6 ([(FcCOCH2CH2COOSnPr2)2O]2C6H6 or C80H108Fe4O14Sn4C6H6, Mr = 2115.93) is of triclinic, space group P?with a = 11.260(4), b = 14.126(5), c = 15.961(6) ? = 91.400(6), = 110.654(6), = 104.931(6), V = 2277(1) 3, Z = 1, Dc = 1.510 g/cm3, = 0.71073 ? (MoK? = 1.750 mm-1 and F(000) = 1046. The structure was refined to R = 0.0466 and wR = 0.1138 for 5061 unique reflections with I > 2(I). The two compounds have the similar structures: both are dimers containing centrosymmetric Sn2O2 cores. But there are some differences in the ligating modes between the carboxylate groups and the Sn atoms.

关键词：合成晶体结构生物活性抗癌活性双-[氧代-双(β-二茂铁基苯酰氧基二-正丙基亭)] 双-[氧代-双(β-二茂铁基丙酰氧基二-正丙基亭)]

Synthesis and Structure of a New Dinuclear Molybdenum(I) Compound with Cyclohexanthiolate Ligand, [Mo_2(SC_6H_(11))_2(CO)_6(CH_3CN)_2]

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Chinese Journal of Structural Chemistry 2004年第12期23卷 1342-1345页

作者：周张锋庄伯涛吴克琛韦永勤洪涛张明昕莽朝永刘彩萍林晨升 StateKeyLaboratoryofStructuralChemistry FujianInstituteofResearchontheStructureofMatterTheChineseAcademyofSciencesFuzhouFujian350002China

The reaction of [Et4N]2[Mo2(SC6H11)2(CO)8] and I2 in MeCN affords a new dinu- clear molybdenum(I) complex [Mo2(SC6H11)2(CO)6(CH3CN)2] 1 (Mr = 672.46). The crystal and molecular structures have been determined by X-ray single-crystal diffraction. 1 crystallizes in monoclinic, space group P21/c with a = 9.302(1), b = 15.514(2), c = 9.307(1) ?, β = 92.979(2)o, V = 1341.4(3) ?3, Z = 2, Dc = 1.665 g/cm3, μ = 11.28 cm-1, F(000) = 676, R = 0.0461 and wR = 0.1274 for 1702 observed reflections with I > 2σ(I). 1 possesses a rhombic bimetallic core MoS2Mo with the Mo–Mo bond length of 2.9712(4) ? and Mo–S of 2.4821(5) ?.

关键词： molybdenum(I)-compound synthesis structure Mo2S2 core

A Facile Synthesis of the C-11 isomer of 5-epi-Kudtriol

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Chinese Chemical Letters 2000年第2期11卷 111-112页

作者： Gang ZHOU1 Xiao Lei GAO1 Zhe ZHANG1 Yu Lin LI1 Zhi Zhen SHANG2 Ren An LIAO2 (1National Laboratory of Applied Organic Chemistry and Institute of Organic Chemistry, Lanzhou University, Lanzhou 730000 2State Key Laboratory of of Elemento-Organic Chemis Natl. Lab. of Appl. Organ. Chemistry Institute of Organic Chemistry Lanzhou University Lanzhou 730000 China State Key Lab. Elemento-Organ. Chem. Nankai University Tianjin 300071 China

The C-ll isomer of natural trihydroxyl sesquiterpene 5-epi-kudtriol has been synthesized starting from (+)-dihydrocarvone via asymmetric dihydroxylation as a key step.

关键词： asymmetric synthesis asymmetric dihydroxylation 5-epi-kudtriol

Mapping the Compositions of Zinc Tantalate for Optimum Photocatalytic Performance in Degradation of Organic Pollutants

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Chinese Journal of Structural Chemistry 2012年第9期31卷 1271-1280页

作者：王运健黄新松李丽萍李广社 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences

This work aims at mapping the compositions of zinc tantalate for optimum photocatalytic performance in degradation of organic pollutants. Three zinc tantalates, low-temperature form ZnTa2O6 （LT-ZnTa2O6）, high-temperature form ZnTa2O6 （HT-ZnTa2O6）, and Zn3Ta2O8 were prepared by solid state method. Photocatalytic activities of these zinc tantalates were tested for the degradation of methyl orange under UV irradiation and compared with Sr2Ta2O7, an efficient catalyst previously reported. It is found that the photocatalytic activity of these tantalates follows such a sequence： LT-ZnTa2O6 〉 Sr2Ta2O7 〉 HT-ZnTa2O6 〉 Zn3Ta2O8, in which LT-ZnTa2O6 shows an optimum activity at least twice higher than Sr2Ta2O7. This photocatalytic performance was revealed to primarily originate from the formation of ·OH radicals as indicated by photo- luminescence measurements. The synergistic effects of chemical compositions, crystal structure, and band structure on photocatalytic performances were discussed.

关键词： zinc tantalate photocatalysis ,OH group

On Pentavalent Arc-Transitive Graphs

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Algebra Colloquium 2018年第2期25卷 189-202页

作者： Jingjian Li Jicheng Ma College of Mathematics and Information Science Guangxi University Nanning 530004 China Guangxi Colleges and Universities Key Laboratory of Mathematics and Its Applications Nanning 530003 China Chongqing Key Laboratory of Group & Graph Theories and Applications Chongqing University of Arts and Sciences Chongqing 402160 China

在这份报纸，所有五价的弧及物的图的描述被给。每张五价的弧及物的盖住图是盖住图的常规简单或基本的 abelian，这被显示出。特别地，盖住组的基本 abelian 是 3， 5 或 25 的亚群。

关键词：五价弧传递图数学初等交换覆盖图理论研究