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Study on the Constitutive Model of Marble Based on the Conventional Triaxial Compression Test

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上海交通大学学报 2004年第Z2期38卷 8-13页

作者： tian sheng-li lu Yun-de Ge Xiu-run School of Civil Engineering and Mechanics Shanghai Jiaotong University Shanghai200240China School of Civil Engineering and Mechanics Shanghai Jiaotong University Shanghai200240China School of Civil Engineering and Mechanics Shanghai Jiaotong University Shanghai200240China Institute of Rock and Soil Mechanics The Chinese Academy of Sciences Wuhan430071 China

The RMB-150B rock mechanics test system was employed to obtain the complete stress-strain test curves under confining pressures of 0-30MPa for marble samples from Ya'an ,Sichuan province. On the basis of former study and the convention triaxial pressure test results ,the complete procedures curves which described the relationships between yielding strength、 peak strength、 residual strength and confining pressure was obtained. Taking the strain softening of rock into account, the bilinear elastic-linear softening-residual perfect plasticity four-linear model was put forward in this paper on the basis of the test results and theory of plasticity. This model was adopted to describe the behaviors of marble in different phases under triaxial compression with the constitutive equation of strain softening phase as focus. The results indicated that the theoretic model fitted in well with the test results.

关键词： theory of plasticity conventional triaxial compression test constitutive model control equation linear softening bilinear elastic

Disturbance rejection control based on acceleration projection method for walking robots

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第11期9卷 1531-1538页

作者： Xu-yang WANG Zhao-hong XU tian-sheng lu School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China

This paper presents a disturbance rejection scheme for walking robots under unknown external forces and moments. The disturbance rejection strategy, which combines the inverse dynamics control with the acceleration projection onto the ZMP (zero moment point)-plane, can ensure the overall dynamic stability of the robot during tracking the pre-computed trajectories. Under normal conditions, i.e., the system is dynamically balanced, a primary inverse dynamics control is utilized. In the case that the system becomes unbalanced due to external disturbances, the acceleration projection control (APC) loop, will be activated to keep the dynamic stability of the walking robot through modifying the input torques. The preliminary experimental results on a robot leg demonstrate that the proposed method can actually make the robot keep a stable motion under unknown external perturbations.

关键词： Inverse dynamics Disturbance reiection ZMP (zero moment point)-plane Orthogonal projection Walking robot

Synthesis and Crystal Structure of a New Glycinato Copper Compound

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Chinese Journal of Structural Chemistry 2006年第5期25卷 631-635页

作者： XIANG sheng-Chang sheng tian-lu FU Rui-Biao HU sheng-Min WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A glycinato copper compound {Cu（NH2CH2COO）（H2O）ClO4} crystallizes in monoclinic, space group P21/n with a = 7.8299（9）, b = 10.3807（10）, c = 9.4775（12）A, β = 109.659（6）°, V = 725.43（12）A^3, Z = 4, Mr = 255.07, Dc = 2.335 g/cm^3, F（000） = 508,μ = 3.381 mm^-1, R = 0.0270 and wR = 0.0707 for 1677 observed reflections with Ⅰ 〉 2σ（Ⅰ）. The title compound contains a chain in the syn-anti conformation, which is generated by the glide-plane operation. The adjacent layers made up of the chains through the connection of perchlorate are related by inversion center operation, which links with each other through the hydrogen bonds.

关键词： glycinato copper complex chain hydrogen bonds

Syntheses and Characterizations of Cyanido-bridged Dinuclear Ru-complexes and Their MMCT Properties in the One-electron Oxidation State

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Chinese Journal of Structural Chemistry 2021年第10期40卷 1253-1264页

作者： LIU Yang ZHU Xiao-Quan WU Xin-Tao sheng tian-lu College of Chemistry Fuzhou UniversityFuzhou 350002China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

We have designed and synthesized a family of dinuclear cyanido-bridged complexes[PY5Me_(2)Ru(μ-CN)Ru(dppe)CpMe_(n)][PF_(6)]_(2) (PY5Me_(2)=2,6-bis (1,1-bis(2-pyridyl)ethyl) pyridine,Cp=cyclopentadienyl,n=0,2[PF6]_(2);n=1,3[PF6]_(2);n=5,4[PF6]_(2)) by using a mononuclear complex[PY5Me_(2)Ru(μ-CN)][PF_(6)](1) as the *** the three complexes have been fully characterized by including single-crystal X-ray diffraction *** one-electron oxidation complexes 2^(3+),3^(3+) and 4^(3+) obtained in situ all show a MMCT absorption band in the visible *** MMCT energy increases as the redox potential of the N-terminal fragments decreases,and the redox potential decreases as the number of methyl groups on the cyclopentadiene of the cyanido-nitrogen coordinated Ru metal increases,supported by the TDF/TDDFT calculations.

关键词： electron transfer mixed-valence metal to metal charge transfer(MMCT) cyanide bridge

Synthesis,Structure and luminescence of a Novel 2D Cadmium Coordination Polymer with a Ligand Generated in situ

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Chinese Journal of Structural Chemistry 2007年第3期26卷 333-337页

作者： HUANG Xi-He sheng tian-lu XIANG sheng-Chang FU Rui-Biao HU sheng-Min LI Ya-Min WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The hydrothermal reaction of 1,2-dicyanobenzene with NaN3 in the presence of Cd（NO3）2 affords a novel 2D cadmium tetrazolyl-benzoate, {Cd（tzbz）（H2O）}n （H2tzbz is 2-（5-tetrazolyl）-benzoate）. The tzbz ligand is generated in situ through the [2＋3] Sharpless cycloaddition reaction and hydrolyzation. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 9.6659（19）, b = 7.6366（15）, c = 25.964（5）A, V= 1916.5（7）A^3, Z= 8, Mr = 318.57, Dc = 2.208 g/cm^3, F（000） = 1232 and p = 2.276 mm^-1. The Cd（Ⅱ） atom is coordinated by four tzbz ligands and one water molecule to form a severely distorted pentangle bipyramid. While each tzbz ligand connects to four Cd（Ⅱ） atoms in a μ4-η1, η, η1, η1, η1 coordination mode to construct a 2D architecture of the title complex. Additionally, the title complex exhibits strong fluorescence at room temperature in the solid state.

关键词： hydrothermal synthesis in situ crystal structure cadmium

Synthesis and Structure of a Dinuclear Copper(Ⅱ)-ditetrazolate Involving in situ Ligand Synthesis

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Chinese Journal of Structural Chemistry 2007年第2期26卷 161-164页

作者： HUANG Xi-He sheng tian-lu XIANG sheng-Chang FU Rui-Biao HU sheng-Min LI Ya-Min WU Xin-Tao State Key Laboratory of Structural Chemistry Fufian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fufian 350002 China

The hydrothermal reaction of 1,2-dicyanobenzene with NaN3 in the presence of CuC12, 2,2＇-bipyridine and H2O affords a novel dinuclear copper（Ⅱ）-ditetrazolate, [Cu（bpy）- （pdtz）]2 （Hpdtz = 5,5＂-1,2-phenylene-ditetrazole, bpy = 2,2＇-bipyridine）. The pdtz ligand is generated in situ through Sharpless 2＋3 cycloaddition reaction. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the monoclinic system, space group P211n with a = 8.2096（16）, b = 18.580（4）, c = 11.838（2） A, β = 103.12（3）°, V = 1758.5（6） A^3, Z = 2, Mr = 863.83, Dc = 1.631 g/cm^3, F（000） = 876 and μ = 1.272 mm^-1. In this novel dinuclear structure, the pdtz ligand adopts a peculiar μ2-η1,η2 coordination mode.

关键词： hydrothermal synthesis in situ crystal structure copper ditetrazolate

Synthesis and Crystal Structure of a Novel Heptanuclear Ruthenium- and Sodium-containing Polyoxomolybdate [{Na(H_2O)_3}_2{Ru(dmso)_3}_2(MoO_4)_3]·_3H_2O

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Chinese Journal of Structural Chemistry 2006年第7期25卷 783-788页

作者： HUANG Xi-He XIANG sheng-Chang FU Rui-Biao sheng tian-lu ZHANG Jian-Jun LI Ya-Min WANG Long-sheng WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The title compound, [{Na（H2O）3}2lRu（dmso）3}2（MoO4）3]·3H2O, has been obtained by the reaction of Na2MoO4·2H2O with cis-Ru（dmso）4Cl2 in aqueous solution. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the triclinic system, space group PI^- with a = 12.3333（3）, b = 12.6289（3）, c = 32.0284（14） A, α = 79.873（7）, β= 87.549（9）, γ = 64.500（4）°, V = 4429.5（2） A^3, Z = 4, Mr = 1358.85, Dc = 2.038 g/cm^3, F（000） = 2696 and μ = 1.874 mm^-1. The compound contains a novel pentanuclear triangle bipyramidal core, [{ Ru（dmso）3 } 2（MoO4）3]^2-, which consists of two { Ru（dmso）3 } ^2＋ fragments and three {μ2-MoO4}^2- units. Furthermore, the dmso ligands bridge the pentanuclear [Ru2Mo3] core and two [Na（H2O）3]^＋ fragments together, forming a neutral heptanuclear ruthenium- and sodiumcontaining polyoxomolybdate.

关键词： synthesis crystal structure ruthenium sodium polyoxomolybdate

One New Schiff Base Complex with One in Situ Synthesized Ligand:Synthesis and Structure

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Chinese Journal of Structural Chemistry 2006年第8期25卷 891-894页

作者： LI Ya-Min ZHANG Jian-Jun sheng tian-lu FU Rui-Biao HU sheng-Min LAI Zhu-Zhi WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

One new Ni（Ⅱ） complex [Ni（H2L）]Cl（H2O）3 based on one in-situ synthesized Schiff base ligand H3L （H3L = bis（benzyl-2-pyridylidene）-diaminoguanidine） was prepared and structurally characterized by single-crystal X-ray diffraction method. The complex crystallizes in the monoclinic system, space group C2/c with a = 27.944（7）, b = 7.7405（19）, c = 25.999（7） ,A, β = 115.545（2）°, V = 5074（2） A^3, Mr = 566.69, Z = 8, Dc = 1.484 g/cm^3, F（000） = 2352,μ（MoKα） = 0.912 mm^-1, R = 0.0594 and wR = 0.1477 for 5145 observed reflections （1 〉 2σ（I））. The complex exhibits one mononuclear structure in which the Ni（Ⅱ） atom adopts a [NiN4] pseudo-planar square geometry. Interestingly, along the b axis, each two neighboring [Ni（H2L）]^＋ units by an inverse center form pairs of molecules through the intermolecular benzene-pyridine π…π interactions.

关键词： Schiff base guanidinate single-crystal structure

Syntheses, Crystal Structures and Different Magnetic Behaviors of Three Cyanide-bridged Fe^(Ⅱ)-M^(Ⅱ)(M = Fe, Co and Mn) Complexes

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Chinese Journal of Structural Chemistry 2021年第9期40卷 1161-1168,1109页

作者： HUANG Ying-Ying XU Qing-Dou HU sheng-Min WU Xin-Tao sheng tian-lu College of Chemistry Fuzhou UniversityFuzhou 350002China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Three dinuclear cyanide-bridged complexes[Fe^(Ⅱ)(PY_(5)OMe_(2))CNM^(Ⅱ)(PY_(5)OMe_(2))](OTf)_(3) (M=Fe1,M=Co 2,M=Mn 3)(PY_(5)OMe_(2)=2,6-bis-((2-pyridyl)methoxymethane)pyridine OTf=CF_(3)SO_(3)^(-)) have been synthesized and ***-crystal diffraction analyses show these three dinuclear compounds are very similar in *** measured ν(CN) results for compounds 1~3 suggest that Mn^(2+) is electron-poorer than Fe^(2+) and Co^(2+).Meanwhile,the temperature dependence of magnetic susceptibilities of complexes 1~3 reveals that in these three complexes,all the cyanide-carbon coordinated Fe(Ⅱ) is low-spin,and Co(Ⅱ) for 2 and Mn(Ⅱ) for 3are both in a high-spin state through 2~400 K but the cyanide-nitrogen coordinated Fe(Ⅱ) for complex 1 exhibits spin crossover (SCO) behavior over 300 K and a hysteresis of 36 K in both cooling and heating modes.

关键词： cyanide-bridged magnetic property spin crossover