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The influence of collision energy on magnetically tuned^(6)Li-^(6)Li Feshbach resonance

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Chinese Physics B 2022年第6期31卷 326-333页

作者： Rong Zhang Yong-Chang Han shu-lin cong Maksim B shundalau Department of Physics Dalian University of TechnologyDalian 116024China DUT-BSU Joint Institute Dalian University of TechnologyDalian 116024China Physics Department Belarusian State UniversityMinskBelarus

The effect of collision energy on the magnetically tuned^(6)Li-^(6)Li Feshbach resonance(FR)is investigated theoretically by using the coupled-channel(CC)method for the collision energy ranging from 1μK·kBto 100μK·*** the collision energy of 1μK·kB,the resonance positions calculated are 543.152 Gs(s wave,the unit 1 Gs=10^(-4)T),185.109 Gs(p wave|ml|=0),and 185.113 Gs(p wave|ml|=1),*** p-wave FR near 185 Gs exibits a doublet structure of 4 mGs,associated with dipole-dipole *** the increase of the collision energy,it is found that the splitting width remains the same(4 mGs),and that the resonance positions of s and p waves are shifted to higher magnetic fields with the increase of collision *** variations of the other quantities including the resonance width and the amplitude of the total scattering section are also discussed in *** thermally averaged elastic rate coefficients at T=10,15,20,25 K are calculated and compared.

关键词： Feshbach resonance collision energy ^(6)Li-^(6)Li system

Mapped Finite Element Discrete Variable Representation

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Chinese Journal of Chemical Physics 2013年第6期26卷 755-764,I0005页

作者： De-quan Yu shu-lin cong Dong H. Zhang Zhi-gang Sun School of Physics and Optoelectronic TechnoloEy Dalian University of Technology Dalian 116024China State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and ComputationalChemistry Dalian Institute of Chemical Physics Chinese Academy of Science Dalian 116023 China

Efficient numerical solver for the SchrSdinger equation is very important in physics and chemistry. The finite element discrete variable representation （FE-DVR） was first proposed by Rescigno and Mc-Curdy [Phys. Rev. A 62, 032706 （2000）] for solving quantum-mechanical scattering problems. In this work, an FE-DVR method in a mapped coordinate was proposed to improve the efficiency of the original FE-DVR method. For numerical demonstration, the proposed approach is applied for solving the electronic eigenfunctions and eigenvalues of the hydrogen atom and vibrational states of the electronic state 3E＋ of the Cs2 molecule which has long-range interaction potential. The numerical results indicate that the numerical efficiency of the original FE-DVR has been improved much using our proposed mapped coordinate scheme.

关键词： Discrete variable representation Mapped Fourier method Ultra-cold atomic photoassociation Schrodinger equation solver Singularity of Coulomb potential

Antimony Selenide Thin Film Solar Cells with an Electron Transport Layer of Alq3

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Chinese Physics Letters 2020年第10期37卷 125-130页

作者： Wen-Jian Shi Ze-Ming Kan Chuan-Hui Cheng Wen-Hui Li Hang-Qi Song Meng Li Dong-Qi Yu Xiu-Yun Du Wei-Feng Liu Sheng-Ye Jin shu-lin cong School of Physics and Electronic Technology Liaoning Normal UniversityDalian 116029China School of Physics Dalian University of TechnologyDalian 116024China Mechanical and Electrical Engineering College Hainan UniversityHaikou 570228China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 China

We fabricated Sb 2 Se 3 thin film solar cells using tris(8-hydroxy-quinolinato)aluminum(Alq 3)as an electron transport layer by vacuum thermal *** small organic molecule of N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)benzidine(NPB)was used as a hole transport *** took ITO/NPB/Sb 2 Se 3/Alq 3/Al as the device *** open circuit voltage(V o c)of 0.37 V,a short circuit current density(J s c)of 21.2 mA/cm 2,and a power conversion efficiency(PCE)of 3.79%were obtained on an optimized device.A maximum external quantum efficiency of 73%was achieved at 600 *** J s c,V o c,and PCE were dramatically enhanced after introducing an electron transport layer of Alq *** results suggest that the interface state density at Sb 2 Se 3/Al interface is decreased by inserting an Alq 3 layer,and the charge recombination loss in the device is *** work provides a new electron transport material for Sb 2 Se 3 thin film solar cells.

关键词： transport Solar interface

Vector Correlations and Product Rotational Alignments of Reactions Ca+RBr→CaBr+R(R=CH_(3),C_(2) H_(5) and n-C_(3) H_(7))

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Chinese Journal of Chemical Physics 2006年第2期19卷 117-122页

作者：马建军丛书林张志红王艳秋大连理工大学物理系大连116024

The quasiclassical trajectory method is used to study the vector correlations of the reactions Ca＋RBr （R=CH3, C2H5 and n-C3H7Br） and the rotational alignment of product CaBr. The product rotational alignment parameters at different collision energies and the vector correlations between the reagent and product are numerically calculated. The vector correlations are described by using the angle distribution functions P（θr）, P（φr）, P（θr, φr） and the polarization-dependent differential cross sections （PDDCSs）. The peak values of P（θr） of the product CaBr from Ca＋CH3Br are larger than those from Ca＋C2H5Br and Ca＋n-C3H7Br. The peak of P（θr） at φr= 3π/2 is apparently stronger than that at φr= x/2 for the three reactions Ca＋RBr. The calculation results show that the rotational angular momentum of the product CaBr is not only aligned, but also oriented along the direction which is perpendicular to the scattering *** product CaBr molecules are strongly scattered forward. The orientation and alignment of the product angular momentum will affect the scattering direction of the product molecules to varying degrees.

关键词： Quasiclassical trajectory Vector correlation Orientation and alignment

The composition of magmatic-hydrothermal fluids and their related metal mineralization

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Science China Earth Sciences 2025年第1期68卷 208-225页

作者： Qihai shu Jun DENG State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences and Resources China University of Geosciences Frontiers Science Center for Deep-time Digital Earth China University of Geosciences

Magmatic hydrothermal deposits are important sources of many bulk, precious, and rare metals, and have attracted interest from both academic and industrial communities. However, it is still unclear if the major enrichment of the ore-forming metals occurs in the parental magma source region, during the magma evolution, or after the fluid exsolution. Fluid inclusions trapped in hydrothermal minerals crystallized in the early, high-temperature stage before metal precipitation record information close to that of the initially exsolved magmatic fluids, which are helpful in revealing whether the metals have been already significantly enriched prior to the hydrothermal stage. In this study, available compositional data of such early-stage fluid inclusions from magmatic hydrothermal systems globally have been compiled. The results indicate that the concentrations of Cu,Sn, and W respectively from the Cu-, Sn-, and W-mineralized fluids are significantly higher than the hydrothermal systems that do not produce ores with the corresponding metals. This suggests that Cu, Sn, and W could have already been enriched in the magma source and/or magma evolution stage. The Mo concentrations show no difference between Mo-mineralized and Mobarren fluid systems, indicating no significant pre-enrichment in the source region or during the magma evolution. This also implies that an efficient collection of Mo from a large volume of magmas is required to account for the formation of a large Mo deposit. Almost all the hydrothermal fluids contain high concentrations of Fe and Zn-Pb, but only a few of them eventually form Fe or Zn-Pb deposits, reflecting an important role of the hydrothermal evolution process on the selective metal *** above results indicate that different metals are enriched in different stages of a magmatic hydrothermal system, and that the major roles played in the formation of a deposit vary with the metal types. In addition to the metal concentrations in the o

关键词： Magmatic hydrothermal deposits Fluid inclusions LA-ICP-MS Metal enrichment Mineralization mechanism

Gamma oscillations and their role in orchestrating balance and communication following stroke

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Neural Regeneration Research 2025年第2期20卷 477-478页

作者： Montana Samantzis cong Wang Matilde Balbi Queensland Brain Institute The University of QueenslandBrisbaneQLDAustralia Engineering Research Centre of Traditional Chinese Medicine Intelligent Rehabilitation Ministry of EducationShanghaiChina

Induced brain oscillations in the gamma range have recently garnered attention due to their reported neuroprotective effects in the treatment of Alzheimer’s *** method differs from pharmacological approaches by tapping into the neuronal population dynamics that underlie the homeostatic processes in the brain that are crucial for the recovery of ***,induced gamma-range oscillations have been used to improve cerebral blood flow,motor function,and synaptic plasticity in a mouse model of focal stroke,highlighting the broad potential of recruiting intrinsic recovery processes for the treatment of neurological *** open questions,such as the frequency specificity of the benefits,will shed light on the intrinsic processes involved and allow clinicians to optimize recovery after stroke.

关键词： protective specificity Alzheimer

Influence of Molecular Stacking Pattern on Excited State Dynamics of Copper Phthalocyanine Films

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Chinese Journal of Chemical Physics 2022年第6期35卷 900-906,I0073页

作者： Meng Li Wen-hui Li Yu-jie Hu Jing Leng Wen-ming Tian Chun-yi Zhao Jun-xue Liu Rong-rong Cui Sheng-ye Jin Chuan-hui Cheng shu-lin cong School of Physics Dalian University of TechnologyDalian 116024China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Photophysical processes occurring within organic semiconductors is important for designing and fabricating organic solar *** phthalocyanine(CuPc)is a typical electron *** this work,the triplet exciton lifetime is prolonged by altering the molecular stacking pattern of the CuPc *** CuPc thin films,the excited state decays are mainly determined by the triplet-triplet annihilation *** ultrafast transient absorption measurements indicate that the primary annihilation mechanism is one-dimensional exciton diffusion collision *** decay kinetics show a clearly time-dependent annihilation rate constant withγ∝t^(-1/2).Annihilation rate constants are determined to beγ0=(2.87±0.02)×10^(-20)cm^(3)·s^(-1/2)and(1.42±0.02)×10^(-20)cm^(3)·s^(-1/2)for upright and lyingdown configurations,*** to the CuPc thin film with an upright configuration,the thin film with a lying-down configuration shows longer exciton lifetime and higher absorbance,which are beneficial to organic solar *** results in this work have important implications on the design and mechanistic understanding of organic optoelectronic devices.

关键词： CuPc Photophysics Excited state Triplet-triplet annihilation Organic solar cell

Attention Eraser and Quantitative Measures for Automated Bone Age Assessment

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Computers, Materials & Continua 2025年第1期82卷 627-644页

作者： Liuqiang shu Lei Yu College of Computer and Information Science Chongqing Normal UniversityChongqing401331China

Bone age assessment(BAA)aims to determine whether a child’s growth and development are normal concerning their chronological *** predict bone age more accurately based on radiographs,and for the left-hand X-ray images of different races model can have better adaptability,we propose a neural network in parallel with the quantitative features from the left-hand bone measurements for *** this study,a lightweight feature extractor(LFE)is designed to obtain the featuremaps fromradiographs,and amodule called attention erasermodule(AEM)is proposed to capture the fine-grained ***,the dimensional information of the metacarpal parts in the radiographs is measured to enhance the model’s generalization capability across images fromdifferent *** is trained and validated on the RSNA,RHPE,and digital hand atlas datasets,which include images from various racial *** model achieves a mean absolute error(MAE)of 4.42 months on the RSNA dataset and 15.98 months on the RHPE *** to ResNet50,InceptionV3,and several state-of-the-art methods,our proposed method shows statistically significant improvements(p<0.05),with a reduction in MAE by 0.2±0.02 years across different racial ***,t-tests on the features also confirm the statistical significance of our approach(p<0.05).

关键词： Bone age assessment attention eraser quantitative feature metacarpal bones

Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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Science China Chemistry 2025年

作者： Panke Zhou Yuxing Huang Ziyue Yu cong Zhang Qian Chen Yiping Li Chao lin Xiong Chen State Key Laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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