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Assessing the synergy effect of additive and matrix on single-crystal growth: Morphological revolution resulted from gel-mediated enhancement on CIT-calcite interaction

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Chinese Chemical Letters 2018年第8期29卷 1296-1300页

作者： Yujing Liu ying Tan Jie Ren Hongzheng Chen Hanying Li MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering State Key Laboratory of Silicon Materials Zhejiang University

It is well known that in biomineralization, the inorganic solids crystallized in the presence of organic phases, which are generally recognized as additives and matrix, leading to the crystal morphology modification. However, the synergy effects of both soluble additive and insoluble matrix on regulating the morphology of synthetic single-crystals are less studied. Here, we examine the morphological revolution of calcite single crystals induced by the additive, citrate（CIT）, or/and the matrix, agarose gel network. The agarose gel matrix is inert to the crystal morphology in the sense that the agarose gelgrown calcite crystals maintain in characteristic rhombohedra. In contrast, CIT additives are active in crystal morphology modification and crystals begin to exhibit curved rough surfaces when grown in solution with the concentration of CIT coated Au nanoparticles（[CIT-Au NPs]） of more than 2.25 mg/***, once agarose gel and CIT-Au NPs are simultaneously introduced, the curved morphological feature emerges at a much lower [CIT-Au NPs] of around 0.2 mg/mL. Increasing the gel concentrations further reduce the [CIT-Au NPs] needed to trigger calcite morphological modification, suggesting that the gel networks reduce the CIT diffusion and thereby enhance the kinetic effects of CIT on crystallization. As such, this work may have implications for understanding the mechanism of hierarchical biominerals construction and provide rational strategy to control single-crystal morphologies.

关键词： Biomineralization Synergy effect Additive CIT Gel matrix Calcite single-crystal Morphology

Synthesis,Self-assembly and Electrode Application of Mussel-inspired Alternating Copolymers

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Chinese Journal of Polymer Science 2018年第8期36卷 897-897,898-904页

作者： ying-Lin Zhang Chuan-Long Li Tahir Rasheed Ping Huang Yong-Feng Zhou School of Chemistry and Chemical Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong University State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University

We reported the first mussel-inspired alternating copolymer with a high amount of catechol groups （50% molar ratio） through a facile epoxy-amino click reaction between 9,9-bis（4-（2-glycidyloxyethyl）phenyl fluorene （BGEPF） and dopamine （DA）. The obtained copolymers were used to prepare carbon/nitrogen-doped α-Fe2O3 nanoparticles through self-assembly, coordination and calcination, which displayed excellent electrochemical performance as anode materials for Li-ion batteries.

关键词： Alternating copolymer Catechol groups Self-assembly Li-ion batteries

The Stability Constants of Complexes of BDBPH- Metals and Species Distributions

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Chinese Chemical Letters 2001年第10期12卷 925-928页

作者： Guo Qiang SHANGGUAN Jun ZHU Ke ying WANG Arthur EMARTELL Department of Chemistry Jining Medical CollegeJining 272013 Department of Chemistry Texas A&M UniversityCollege StationTexas 77842

The stability constants of the mononuclear complexes of BDBPH-Zn(II), Cd(II) and Mn (II) were determined by the potentiometric equilibrium measurements, and species distributions were also discussed. The metal ions do not combine with the ligand until the first two protons of the ligand have almost been completely neutralized. The main species were mononuclear complexes with the diprotonated ligand, MH,L. The three metal ions also form mono- and noprotonated (fully deprotonated) complexes, MHL, ML. The relative order of stabilities of the mononuclear complexes, ML, is Zn(II) > Cd(II) > Mn(II). The ligand has strong tendency to form mononuclear complexes with Zn(II), Cd(II) and Mn(II), and it can also form dinuclear complexes at high pH.

关键词： BDBPH stability constant mononuclear complex species distribution

Response of Cytochrome P450 Expression to Maize Volatiles in Helicoverpa armigera (Hner)

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Journal of Integrative Agriculture 2013年第4期12卷 646-652页

作者： WU Shao-ying SHI Xue-yan WANG Yi GAO Xi-wu Department of Entomology China Agricultural University College of Plant Protection Henan Agricultural University

The 7-ethoxycoumarin O-deethylase （ECOD） activities of cytochrome P450s and differential expression of six cytochrome P450 genes induced by the volatiles from both damaged and undamaged maize plants were investigated in the cotton bollworm, Helicoverpa armigera （Hiabner）. The ECOD activity changed with time of exposure to maize volatiles. At 36 h after cotton bollworm larvae exposure to maize volatiles, the ECOD activities in cotton bollworm damaged and artificially damaged groups were 2.36 and 4.53 times higher than the control group respectively. The relative expression levels of CYP4S1, CYP6B2 and CYP6B7 in the cotton bollworm were significantly increased in artificially damaged plant group, which was 2.93, 5.09 and 10.66 times higher than that in the control group, respectively. The expression levels of CYP6B2, CYP6B6, CYP9A12, and CYP9A14 were much lower in the larvae exposure to volatiles from both healthy and pest damaged maize seedlings than in the control group at 12 h after larvae exposure to maize volatiles. For the cotton bollworm damaged maize group, the expression of CYP4S1 and CYP9A14 increased.

关键词： 7-ethoxycoumarin O-deethylase cytochrome P450 gene maize volatile Helicoverpa armigera

Topological analysis of plasma flow control on corner separation in a highly loaded compressor cascade

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Acta Mechanica Sinica 2012年第5期28卷 1277-1286页

作者： Xiao-Hu Zhao Yun Wu ying-Hong Li Xue-De Wang Qin Zhao Science and Technology on Plasma Dynamics Laboratory Air Force Engineering University

In this paper, flow behavior and topology structure in a highly loaded compressor cascade with and without plasma aerodynamic actuation （PAA） are investigated. Streamline pattern, total pressure loss coefficient, outlet flow angle and topological analysis are considered to study the effect and mechanism of the plasma flow control on corner separation. Results presented include the boundary layer flow behavior, effects of three types of PAA on separated flows and performance parameters, topology structures and sequences of singular points with and without PAA. Two separation lines, reversed flow and backflow exist on the suction surface. The cross flow on the endwall is an important element for the comer separation. PAA can reduce the undertuming and overturning as well as the total pressure loss, leading to an overall increase of flow turning and enhancement of aerodynamic performance. PAA can change the topology structure, sequences of singular points and their corresponding separation lines. Types II and III PAA are much more efficient in controlling comer separation and enhancing aerodynamic performances than type I.

关键词： Plasma aerodynamic actuation - Compressor Cascade Topology structure Corner separation

Constitutive Models for Compressive Deformation of AZ80Magnesium Alloy under Multiple Loading Directions and Strain Rates

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Journal of Iron and Steel Research International 2016年第1期23卷 64-68页

作者： Xu-qing CHANG Li-ying ZHANG Yong-biao YANG Jing-li REN School of Software North University of China School of Mathematics and Statistics Zhengzhou University School of Materials Science and Engineering North University of China

Two constitutive models,the modified Johnson-Cook model and the logarithm linear relation model based on empirical approach and data analysis,were presented to illustrate compressive deformation of magnesium alloys AZ80 under multiple loading directions and strain *** results of stress-strain curve analysis and sensitivity index analysis suggested that the stress held large fluctuations in loading direction of 90°.Model testing signified that the logarithm linear relation model was more proper than the modified Johnson-Cook model in view of relative mean square error and correlation ***,numerical simulation building on established models also indicated that the logarithm linear model is more precise than the modified Johnson-Cook model.

关键词： AZ80magnesium alloy constitutive model modified Johnson-Cook model loading direction

Intelligent test case generation based on branch and bound

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The Journal of China Universities of Posts and Telecommunications 2014年第2期21卷 91-97,103页

作者： XING ying GONG Yun-zhan WANG Ya-wen ZHANG Xu-zhou State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications School of Electronic and Information Engineering Liaoning Technical University State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences

Path-oriented test case generation is in essence a constraint satisfaction problem （CSP） solved by search strategies, among which backtracking algorithms are widely used. In this article, the backtracking algorithm branch and bound （BB） is introduced to generate path-oriented test cases automatically. A model based on state space search is proposed to construct the search tree dynamically. The BB is optimized from two perspectives. Variable permutation with a heuristic rule to break ties is adopted for the branching operation, and interval computation with analysis on the monotony of branching conditions is utilized for the bounding operation. Empirical experiments show that the proposed method performs well with linear complexity, and reaches 100% coverage on some benchmark programs with an advantage over some static and dynamic algorithms.

关键词： test case generation constraint satisfaction problem branch and bound state space search

Structure of Electrochemically Lithiated Li_(0.33)MnO_2

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Chemical Research in Chinese Universities 2011年第4期27卷 669-672页

作者： CHEN Hong WEI ying-jin WANG Chun-zhong CHEN Gang College of Materials Science and Engineering Jilin University Changchun 130012 P. R. China College of Physics Beihua University Jilin 132013 P. R. China State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 P. R. China

Li0.33MnO2 cathode material was synthesized by solid state reaction which showed a monoclinic *** situ synchrotron diffraction showed a reversible structural transition of Li0.33MnO2 during Li＋ insertion/***,it is difficult to determine the crystal structure of lithiated Li0.33＋xMnO2 based on their poorly resolved diffraction *** difficulty was successfully resolved by X-ray absorption spectroscopy（XAS） and Raman scattering which are sensitive to the short-range ordering of material *** X-ray absorption fine structure shows the co-existence of corner-and edge-shared [MnO6] in Li0.33MnO2,whereas only edge-shared [MnO6] in lithiated ***,the differences between the Raman spectra of Li0.33MnO2 and Li0.96MnO2 indicate the phase transition of the material with Li＋ *** work shows that Li0.33MnO2 transforms to monoclinic LiMnO2 with Li＋ *** phase transformation was suggested to evolve from the migration of Mn ions.

关键词： Lithium ion battery Phase transformation X-Ray absorption spectroscopy(XAS) Raman scattering

A Layer-Based Mesh Generator and Scheme for 3D Printing Simulation

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Computer Modeling in Engineering & Sciences 2019年第8期120卷 363-374页

作者： Ming-Hsiao Lee Shou-I Chen Wen-Hwa Chen ying Mao National Center for High-performance Computing NARLHsinchu 30013Taiwan China University of Technology TaipeiTaiwan National Tsing Hua University Hsinchu 30013Taiwan

3D Printing,also called Additive Manufacturing,has become a promising manufacturing method to produce parts in various fields as it can produce parts even with very irregular shapes in a relatively shorter process and ***,during the printing process,some problems could decrease the accuracy and quality of the printed parts,such as warpage due to thermal strains,deformation due to inadequate supports,*** finite element method is most commonly adopted to evaluate engineering problems in advance to reduce possible failures;however,the element meshes,needed for analyses,are always irregularly distributed,especially for irregular objects,and cannot match the layer-by-layer growing shapes of the printed parts in the 3D printing *** a proper element mesh,the analysis cannot be *** overcome this problem,a layer-based mesh generator combined with a corresponding scheme for the 3D Printing simulation is proposed and *** the proposed methods,the analysis models can be designed and generated to match the growing shapes,i.e.,layer-by-layer,and used to simulate the layer-by-layer growing behavior in the 3D printing ***,the proposed schemes directly adopt the Stereo-Lithography(STL)formatted geometric data as the geometry model on which the mesh generation and simulation are *** makes them even easier to use since the STL geometry format is a De facto standard format used in the 3D printing *** simulation cases have been conducted to demonstrate the effectiveness and efficiency of these proposed schemes.

关键词： 3D printing mesh generator layer-by-layer layer-based