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EFFECTS OF NH_4Cl ON THE INTERACTION BETWEEN POLY(ETHYLENE OXIDE) AND IONIC SURFACTANTS IN AQUEOUS SOLUTIONS

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Chinese Journal of Polymer Science 2008年第1期26卷 31-37页

作者： Li, Jing Li, Hua-zhen Yang, Hai-yang Zhu, ping-ping He, ping-sheng Univ Sci & Technol China Dept Polymer Sci & Engn Hefei 230026 Peoples R China

The interaction of poly(ethylene oxide)(PEO)with the ionic surfactants,sodium dodecylsulfate(SDS)and cetyltrimethylammonium chloride(CTAC)respectively,in aqueous solutions containing a certain concentration of NH_4Cl, is studied by the viscosity *** has been found that the ion-dipole interaction between PEO and ionic surfactants is changed considerably by the organic *** anionic suffactant of SDS,the addition of NH_4Cl into solution strengthens the interaction between PEO and the headgroup o...

关键词： Viscosity Ion-dipole interaction Non-ionic polymer Ionic surfactant NH_4Cl

NUMERICAL METHOD FOR MULTI-BODY FLUID INTERACTION BASED ON IMMERSED BOUNDARY METHOD

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Journal of Hydrodynamics 2011年第4期23卷 476-482页

作者： MING ping-jian ZHANG Wen-ping School of Power and Energy Engineering Harbin Engineering University Harbin 150001 China

A Cartesian grid based on Immersed Boundary Method （IBM）, proposed by the present authors, is extended to unstructured grids. The advantages of IBM and Body Fitted Grid （BFG） are taken to enhance the computation efficiency of the fluid structure interaction in a complex domain. There are many methods to generate the BFG, among which the unstructured grid method is the most popular. The concept of Volume Of Solid （VOS） is used to deal with the multi rigid body and fluid interaction. Each body surface is represented by a set of points which can be traced in an anti-clockwise order with the solid area on the left side of surface. An efficient Lagrange point tracking algorithm on the fixed grid is applied to search the moving boundary grid points. This method is verified by low Reynolds number flows in the range from Re = 100 to 1000 in the cavity with a moving lid. The results are in a good agreement with experimental data in literature. Finally, the flow past two moving cylinders is simulated to test the capability of the method.

关键词： fluid-structure interaction Immersed Boundary Method (IBM) Volume Of Solid (VOS) unstructured grids

Energy Spectra,g Factors and Their Pressure—Induced and ／or Thermal Shifts of SrTiO3：Cr^3＋ and SrTiO3：Mn^4＋ I：energy Spectra and g Factors at Normal Pressure

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Communications in Theoretical Physics 2001年第4期35卷 491-496页

作者： ZHANGJi－ping MADong－ping DepartmentofAppliedPhysics SichuanUniversityChengdu610065China InternationalCentreforMaterialsphysics TheChineseAcademyofSciencesShenyang110015China DepartmentofAppliedPhysics Si

With the strong-field scheme and cubic bases, the complete d3 energy matrix in a tetragonally distorted cubic-field has been constructed. By diagonalizing this matrix, the energy spectra of SrTiO3:Cr3+ and SrTiO3:Mn4+ at normal pressure and various temperatures have been calculated. Correspondingly, the FORTRAN program calculating the g factor of the ground state has been worked out. By using the program and the wavefunction obtained from diagonalizing the complete energy matrix, the g factors of the ground state of SrTiO3:Cr3+ and SrTiO3:Mn4+ at normal pressure and room temperature have been evaluated. The calculated results are in good agreement with the optical-spectral and EPR experimental data. The comparison and analysis of the results of two crystals have been made. It is demonstrated that the covalency of the bonding between Mn4+ and ligands (O2-) in SrTiO3:Mn4+ is stronger than the one of the bonding between Cr3+ and ligands (O2-) in SrTiO3:Cr3+. It is shown that the obtained wavefunctions and values of parameters are reasonable.

关键词： crystal fields energy spectrum optical properties g factors covalency

Predictive Control with Velocity Observer for Cushion Robot Based on PSO for Path Planning

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Journal of Systems Science & Complexity 2020年第4期33卷 988-1011页

作者： SUN ping SHAN Rui School of Information Science and Engineering Shenyang University of TechnologyShenyang 110870China

This paper proposes a novel model predictive control method with velocity estimation simultaneously constraining trajectory and velocity tracking errors for a cushion robot. The authors investigated a path planning method using improved particle swarm optimization(PSO) combined with Dijkstra’s algorithm and obtained a real-time desired optimal motion path for obstacle *** authors designed a velocity observer to estimate the unmeasurable speed, while the asymptotic stability of the observer error system was established. A predictive controller with error-constrained performance was derived by solving a quadratic programming problem with incremental control. Simulation and experimental results confirm the effectiveness of the proposed method and verify that the error constraints adopted in the cushion robot provide safe motion while avoiding obstacles.

关键词： robot Robot Velocity

Impressive self-healing phenomenon of Cu_2ZnSn(S, Se)_4 solar cells

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Chinese Physics B 2018年第6期27卷 72-80页

作者： Qing Yu jiangjian Shi Pengpeng Zhang Linbao Guo Xue Min Yanhong Luo Huijue Wu Dongmei Li Qingbo Meng CAS Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of PhysicsChinese Academy of Sciences（CAS）School of Physical Sciences University of Chinese Academy of Science

A study of the self-healing phenomenon of Cu2ZnSn（S, Se）4（CZTSSe） solar cells has shown more than 10% enhancement in cell performance after storage at room temperature for a week, with a significant improvement in the open-circuit photovoltage（V（oc）） and fill factor（F F）. In addition, up to 10.45% power conversion efficiency（PCE） has been *** obvious change in crystallinity, crystal phase, optical absorption or elemental distribution in the CZTSSe films was detected on examining the x-ray diffraction（XRD） pattern, Raman spectrum, ultraviolet-visible（UV-Vis）, and *** investigations on the charge carrier concentration, charge radiative recombination, and band structure suggest that the enhancement in PCE stems mainly from a reduction in deep defects of the CZTSSe semiconductor film.

关键词： Cu2ZnSn(SSe)4 defects reduction self-healing

Thermal environmental effect on the Chang'E-5 lander revealed by in-situ temperature data

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Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 213-214页

作者： Jinsong ping National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Sciences University of Chinese Academy of SciencesBeijing 100101China

The thermal environment of the solid planetary body surface is extremely important to the thermal design of the landing mission,and to the placement of the detection instruments and other payloads,as well as to the interpretation of scientific *** the Moon,the thermal environment of the lunar surface exerts a significant effect on the temperature of both the sunny and the shadow sides of the Chang’E-5 lander.

关键词： effect thermal payload

Energy Spectra, g Factors and Their Pressure-Induced and/or Thermal Shifts of SrTiO3:Cr3+ and SrTiO3:Mn4+ Ⅲ: R-Line Thermal Shifts of SrTiO3:Mn4+

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Communications in Theoretical Physics 2001年第11期36卷 463-468页

作者： MA Dong-ping ZHANG Ji-ping Department of Applied Physics Sichuan University Chengdu 610065 China International Centre for Materials Physics The Chinese Academy of Sciences Shenyang 110015 China Department of Applied Physics Sichuan University Chengdu 610065 China

By taking into account all the irreducible representations and their components in the electron-phonon interaction (EPI) as well as all the levels and the admixtures of basic wavefunctions within d3 electronic configuration,the values of the parameters in the expressions of thermal shift (TS) from EPI for the ground level, R level and R line of SrTiO3:Mn4+ have been evaluated; the R-line TS and various contributions to it have been calculated in the low-temperature region. It is found that all the three terms of R-line TS from EPI relevant to the lattice vibration are red shifts. The Raman term is the largest, the neighbor-level term is the second, and the optical-branch term is very small over the range of T ≤ 80 K. The contribution to R-line TS from thermal expansion has been approximately neglected in this work. The very strong EPI relevant to its lattice vibration for SrTiO3:Mn4+ causes its R-line TS to be an unusually large red-shift. Only by taking into account the strong softening of the low-frequency acoustic modes of the lattice vibration at low temperatures, can we successfully explain the variation of R-line TS of SrTiO3:Mn4+ with temperature.

关键词： crystal fields, optical properties, electron-phonon interaction, thermal shift, softening of acoustic modes

Advances in noble metal-modified g-C_(3)N_(4) heterostructures toward enhanced photocatalytic redox ability

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International Journal of Minerals,Metallurgy and Materials 2024年第11期31卷 2368-2389页

作者： Xiao Zhang ping Yang Faculty of Chemical Engineering and Technology Cracow University of TechnologyKrakow 31-155Poland School of Material Science&Engineering University of JinanJinan 250022China

The photocatalytic activity of catalysts depends on the energy-harvesting ability and the separation or transport of photogenerated *** light absorption capacity of graphitic carbon nitride(g-C_(3)N_(4))-based composites can be enhanced by adjusting the surface plasmon resonance(SPR)of noble metal nanoparticles(e.g.,Cu,Au,and Pd)in the entire visible *** can be carried out by varying the nanocomponents of the *** SPR of noble metals can enhance the local electromagnetic field and improve interband transition,and resonant energy transfer occurs from plasmonic dipoles to electron-hole pairs via near-field electromagnetic ***,noble metals have emerged as relevant nanocomponents for g-C_(3)N_(4) used in CO_(2) photoreduction and water ***,recent key advances in noble metals(either in single atom,cluster,or nanoparticle forms)and composite photocatalysts based on inorganic or organic nanocomponent-incorporated g-C_(3)N_(4) nanosheets are systematically discussed,including the applications of these photocatalysts,which exhibit improved photoinduced charge mobility in CO_(2) photoconversion and H2 *** related to the different types of multi-nanocomponent heterostructures(involving Schottky junctions,Z-/S-scheme heterostructures,noble metals,and additional semiconductor nanocomponents)and the adjustment of dimensionality of heterostructures(by incorporating noble metal nanoplates on g-C_(3)N_(4) forming 2D/2D heterostructures)are *** current prospects and possible challenges of g-C_(3)N_(4) composite photocatalysts incorporated with noble metals(e.g.,Au,Pt,Pd,and Cu),particularly in water splitting,CO_(2) reduction,pollution degradation,and chemical conversion applications,are summarized.

关键词： g-C_(3)N_(4) heterostructure noble metal photocatalysis H_(2)generation CO_(2)

Pd-Catalyzed Intermolecular Dearomative Heck Reaction of Indole Derivatives

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Chinese Journal of Chemistry 2020年第5期38卷 525-526页

作者： ping Yang State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling LuShanghai 200032China

Dearomatization of indole derivatives[1,2]provides a straightforward approach for synthesizing diverse indolines which serve as the structural core of numerous natural products and pharmaceuticals.[3]Over the past decade,Pd-catalyzed Heck reaction[4]has been applied in the dearomatization of *** this regard,several elegant intramolecular dearomative Heck reactions of indoles have been developed.[s]However,to date,the reported works are mainly limited to intramolecular reactions,which proceed viaβ3-hydride elimination or trapping by an additional nucleophile(Scheme 1(a)).However,additional synthetic elaboration is usually required to access appropriate substrates for the key dearomatization step,thus reducing the synthetic efficiency.

关键词： intramolecular Heck straight