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Synthesis and Crystal Structure of a 2-D Framework Supramolecular Complex [Cd_2(phen)_2(adip)(NO_3)_2]

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Chinese Journal of Structural Chemistry 2006年第5期25卷 594-598页

作者： SUN Ya-Guang gao en-jun WEI De-Zhou WANG Chuan-Sheng Laboratory of Coordination Chemistry Shenyang Institute of Chemical Technology Shenyang 110142 China School of Resource ＆ Civil engineering Northeastern University Shenyang 110004 China

A novel binucleus complex [Cd2（phen）4（adip）（NO3）2] （phen = phenanthroline, H2adip = adipic acid） has been synthesized by the reaction of phen and H2adip with cadmium（Ⅱ） salt. Elemental analysis, IR spectra and X-ray crystal structure analysis were carried out to determine the crystal structure of the title complex. The crystal belongs to triclinic, space group P1^- with a = 9.638（7）, b = 10.315（7）, c = 13.109（10） A, α = 88.305（11）, β = 69.011（11）, γ = 75.818（11）°, C27H20N5O5Cd, Mr = 606.88, Z = 2, V = 1177.2（14）A^3, Dc = 1.712 g/cm^3,μ= 0.979 mm^-1, -8≤h ≤11, -12≤k≤ 12, -10≤l≤ 15, F（000） = 610, Rint = 0.0314, R = 0.0739 and wR = 0.1922 （Ⅰ〉 2σ（Ⅰ）. The cadmium atom is seven-coordinated in a distorted pentagonal bipyramidal configuration. The complex forms a 2-D supramolecular framework by C-H…O weak interactions and π-π stacking of neighbouring phen ligands.

关键词： cadmium(Ⅱ) supramolecular adipic acid crystal structure

Synthesis and Crystal Structure of Complex [Pb(qina)_2(DMSO)]·H_2O

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Chinese Journal of Structural Chemistry 2007年第3期26卷 357-360页

作者： ZHANG Wan-Zhong WEI De-Zhou gao en-jun SUN Ya-Guang School of Resources and Civil engineering Northeastern University Shenyang 11 0015 China Laboratory of Coordination Chemistry Shenyang Institute of Chemical Technology Shenyang 110142 China

A novel complex [Pb（qina）2（DMSO）]·H2O was synthesized, of which qinais the quinaldic acid radical and DMSO the dimethyl sulfoxide. Elemental analysis, IR spectra, and X-ray single-crystal diffraction were carried out to determine the composition and crystal structure. This complex belongs to monoclinic system, space group P121/n1, with a = 7.1553（17）, b = 17.543（2）, c = 17.306（2） A, β = 91.671（4）°, C22H20N206PbS, Mr = 647.65, Z = 4, V= 2171.5（6） A3, Dc= 1.981 g/cm^3, μ= 7.908 mm^-1, F（000） = 1248, -9≤h≤6, -23≤k≤19, -22≤1≤22, R= 0.0221 and wR= 0.0488. Weak coordinate bond is formed between oxygen atom in DMSO and Pb（ Ⅱ ）. There are also weak interactions, such as π-π interaction, hydrogen bonds and so on, among the complex molecules.

关键词： Pb(Ⅱ) complex crystal structure

Synthesis and Crystal Structure of the Binuclear Complex:[Cu_2(phen)_2(ip)(Hip)_2]·4H_2O

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Chinese Journal of Structural Chemistry 2007年第2期26卷 157-160页

作者： SUN Ya-Guang GU Xiao-Fu gao en-jun Ren Ling ZHANG Dong-Sheng XU Jie Laboratory of Coordination Chemistry Shenyang Institute of Chemical Technology Shenyang 110142 China

A binuclear complex [Cu2（phen）2（ip）（Hip）2].4H2O has been synthesized by the reaction of Cu（CH3COO）2.H2O, phen（1,10-phenanthroline） and isophthalic acid （H2ip） under hydrothermal condition. Elemental analysis, IR spectra and X-ray single-crystal diffraction were carded out to determine the composition and crystal structure. Crystal data for this complex： monoclinic, space group C2/c, a = 19.214（3）, b = 10.6973（14）, c = 22.567（3） A, β = 105.081（2）°, C24H19N2O8Cu, Mr= 526.95, Z = 8, F（000） = 2160, V= 4478.6（10） A3, Dc = 1.563 g/cm^3,μ = 1.030 mm^-1, -24≤h≤ 16, -13≤k≤13, -28≤l≤28, R = 0.0369 and wR = 0.0819 for 4615 （Rint = 1.0357） independent reflections and 3290 observed ones （I 〉 2σ（I））. Structural analysis shows that coordination geometry of Cu（ Ⅱ ） is a planar square, and the title complex exhibits a 2-D framework supramolecular structure by hydrogen bonds and π-π stacking interactions.

关键词： Cu(Ⅱ) crystal structure isophthalic acid supramolecule

Synthesis,Structure and Properties of Three-dimensional Gd(Ⅲ),Eu(Ⅲ) Coordination Polymers via in situ Decarboxylation

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Chemical Research in Chinese Universities 2009年第5期25卷 614-619页

作者： WANG Chuan-sheng GU Xiao-fu SUN Ya-guang gao en-jun ZHANG Wan-zhong Laboratory of Coordination Chemistry Shenyang Institute of Chemical Technology Shenyang 110142 P. R. China

Two three-dimensional lanthanide（Ⅲ） coordination polymers with the formula [Ln（PYDC）（NA）（H2O）]n [Ln=Gd（1）, Eu（2）, H2PYDC=pyridine-2,5-bicarboxylic acid, HNA=nicotinic acid] have been hydrothermally synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction. The NA came from in situ decarboxylation of the part of PYDC. X-ray single crystal structural analyses reveal that complexes 1 and 2 are isomorphous, they possess the 43.63 topology assembled by Gd^3＋/Eu^3＋ and two different multidentate carboxylate ligands Magnetic measurements show that antiferromagnetic coupling exists between adjacent Gd^3＋ ions in complex 1. The complex 2 exhibits the corresponding characteristic luminescence in the visible region under an excitation at 305 nm.

关键词： Coordination polymer Decarboxylation Luminescence Magnetic property

Thermodynamical study on the formation of some mixed ligand complexes of non-transition metal ions in solution——Ⅰ. The formation and the stability of some Pb(Ⅱ) mixed ligand complexes

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Chinese Journal of Chemistry 1991年第5期9卷 415-420页

作者： LIU Qi-Tao ZHANG Feng SONG Xi-Ming gao en-jun Department of Chemistry Liaoning UniversityShenyang 110036

The stability constants of the binary complexes of type PbB, PbB_2, and the mixed ligand complexes of type PbAB have been studied by potentiometric pH titration technique at ionic strength I=0.10 (KNO_3) and at temperature 15, 25, 35 and 45℃ respectively, where A=2,2'-bipyridyl (bipy) or 1, 10-phenanthroline (phen); B=malonate (mal), succinate (suc), or anthranilate (anth). The equalibrium constants logK,~1 G, H, and S of the reaction PbA+PbB=PbAB+Pb^2+ have been calculated. The results show that the discriminating effects^2 between the primary ligand (bipy or phen) and the secondary ligand (real, suc or anth) in those non-transition metal mixed ligand complexes are also evident, and as a measurement of this effect, H is more appropriate than logK. The possible reasons which lead to these results have been discussed.

关键词： The formation and the stability of some Pb mixed ligand complexes

energy-efficient buffer and service rate allocation in manufacturing systems using hybrid machine learning and evolutionary algorithms

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Advances in Manufacturing 2024年第2期12卷 227-251页

作者： Si-Xiao gao Hui Liu jun Ota Key Laboratory of Traffic Safety on Track of Ministry of Education Institute of Artificial Intelligence and Robotics(IAIR)School of Traffic and Transportation EngineeringCentral South UniversityChangsha410075People’s Republic of China Research into Artifacts Center for engineering School of EngineeringThe University of TokyoTokyoJapan

Currently,simultaneous buffer and service rate allocation is a topic of interest in the optimization of manufacturing *** allocation problems have been solved previously to satisfy economic requirements;however,owing to the progress of green manufacturing,energy conservation and environmental protection have become increasingly ***,an energy-efficient approach is developed to maximize the throughput and minimize the energy consumption of manufacturing systems,subject to the total buffer capacity,total service rate,and predefined energy *** energy-efficient approach integrates the simulated annealing-non-dominated sorting genetic algorithm-II with the honey badger algorithm-histogram-based gradient boosting regression *** former algorithm searches for Pareto-optimal solutions of sufficient *** latter algorithm builds prediction models to rapidly calculate the throughput,energy consumption,and energy *** examples show that the proposed hybrid approach can achieve a better solution quality compared with previously reported ***,the prediction models can rapidly evaluate manufacturing systems with sufficient *** study benefits the multi-objective optimization of green manufacturing systems.

关键词： energy-efficient allocation Multi-objective optimization energy efficiency energy consumption Machine learning

Asymptotic Inference in the Random Coefficient Autoregressive Model with Time-functional Variance Noises

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 320-346页

作者： en-wen ZHU Zi-wei DenG Han-jun ZHANG jun CAO Xiao-hui LIU Department of Mathematics and Statistics Changsha University of Science and TechnologyChangsha 410114China School of Mathematics and Computational Science Xiangtan UniversityXiangtan 411105China School of Statistics and Data Science and Key Laboratory of Data Science in Finance and EconomicsJiangxi University of Finance and EconomicsNanchang 330013China

This paper considers the random coefficient autoregressive model with time-functional variance noises,hereafter the RCA-TFV *** first establish the consistency and asymptotic normality of the conditional least squares estimator for the constant *** semiparametric least squares estimator for the variance of the random coefficient and the nonparametric estimator for the variance function are constructed,and their asymptotic results are reported.A simulation study is presented along with an analysis of real data to assess the performance of our method in finite samples.

关键词： random coefficient autoregressive model time-functional variance conditional least squares semiparametric least squares

Exhaust hood performance and its improvement technologies in industrial buildings:A literatu rereview

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Building Simulation 2024年第1期17卷 23-40页

作者： Jing Zhang Jian Wang jun gao Weimin Zhang Architectural engineering Institute Jinhua PolytechnicJinhua 321017China Institute of HVAC engineering Schoolof Mechanical EngineeringTongji UniversityShanghai 200092China Tongji Architectural Design(Group)Co .LtdShanghai 200092China

The pollutant control performance of exhaust hoods plays a crucial role in the indoor air quality and energy consumption of ventilation systems in industrial *** better understand the impact of local ventilation on the industrial indoor environment,this paper presents a literature review of exhaust hood performance and its improvement *** create an index for evaluating the performance of exhaust hoods,the capture velocity,capture efficiency,flow ratio of pollutant emissions and exhaust airflow and energy consumption are first introduced.A number of factors affecting exhaust hood performance are assessed such as hood type,hood opening size,exhaust rate,installation distance,pollution source emission and environmental *** to structural improvement methods,the use of active airflow is a more effective way to improve the exhaust hood *** most commonly used methods for determining the exhaust rate are the controlled speed method and the flow ratio *** use of an exhaust hood with an appropriate exhaust rate and jet parameters(for an active air-assisted hood)can effectively improve the pollutant control performance and reduce the energy consumption that would be wasted on the redundant exhaust *** more information focused on exhaust hood performance,this work suggests more effective strategies for improving indoor air quality and reducing energy consumption in industrial buildings.

关键词： industrial ventilation exhaust hood capture efficiency exhaust rate performance improvement

Hole cleaning evaluation and installation spacing optimization of cuttings bed remover in extended-reach drilling

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Petroleum Science 2024年第3期21卷 2005-2022页

作者： Shuo Peng Wen-jun Huang De-Li gao MOE Key Laboratory of Petroleum engineering China University of Petroleum-BeijingBeijing102249China State Key Laboratory of Petroleum Resources and engineering China University of Petroleum-BeijingBeijing102249China

In extended-reach or long-horizontal drilling,cuttings usually deposit at the bottom of the *** cuttings accumulate to a certain thickness,complex problems such as excessive torque and drag,tubing buckling,and pipe stuck probably occur,which results in a lot of non-productive time and remedial *** bed remover can efficiently destroy deposited cuttings in time through hydraulic and mechanical stirring *** paper aims to build a method for hole cleaning evaluation and installation spacing optimization of cuttings bed remover to improve the wellbore cleaning ***,a Computational Fluid Dynamics approach with Eulerian—Eulerian multiphase model was utilized to investigate the mechanism of cuttings transportation,and a new type of cuttings bed remover was ***,an evaluation method of hole cleaning effect of remover was *** that,the effects of several drilling parameters on hole cleaning including flow rate of drilling fluid,rotational speed of drillpipe,rate of penetration,wellbore size,rheological property of drilling fluid,and remover eccentricity on the performance of cuttings bed remover were *** results demonstrate that the new type of remover with streamline blade performs better than conventional *** efficiency of hole cleaning is greatly improved by increasing the rotational speed of drillpipe,flow rate of drilling fluid,remover eccentricity,and 6 rpm Fann dial reading for drilling *** higher rate of penetration and large wellbore size result in worse hole *** findings can serve as an important guide for the structure optimization design of cuttings bed remover and installation spacing of removers.

关键词： Extended-reach drlling Drilling hydraulics Cuttings transport Hole cleaning Cuttings bed remover