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Rational SU(N) Gaudin Model

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Chinese Physics Letters 2001年第6期18卷 715-717页

作者： cao jun-peng HOU Bo-Yu YUE Rui-Hong Institute of Modern Physics Northwest UniversityXi’an 710069

We propose the eigenstates and eigenvalues of Hamiltonians of the rational SU(N)Gaudin model based on the quasi-classical limit of the SU(N)chain under the periodic boundary *** the quantum inverse scattering method,w... 详细信息

关键词： model. rational Gaudin

Fabrication of Molecularly Imprinted Electrospun Nanofibers with Mono-amidoxime Functional Ligand for Efficient Decontamination of Toxic Organophosphates

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Chinese Journal of Polymer Science 2024年第4期42卷 446-456页

作者： Lan Wang peng Jiang Ya-Lin Niu jun-peng cao Tian-Ying Guo Key Laboratory of Functional Polymer Materials Ministry of EducationInstitute of Polymer ChemistryCollege of Chemistry and Frontier Science Center for the Creation of New Organic SubstancesNankai UniversityTianjin300071China

There is an urgent imperative to discover practical and efficacious artificial catalysts for the expeditious decontamination of toxic organophosphates. Herein, we propose a novel molecularly imprinted approach utilizing electrospun fiber scaffolds. Specifically, an amidoxime-based functional polymer (PMAOX) has been synthesized, which contains amidoxime groups that can act as nucleophiles and ligands for the formation of catalytic active sites. This polymer was blended with polyacrylonitrile (PAN), a well-processable material, to prepare a nanofiber mat using electrospinning techniques. Then, the amidoxime side groups on fiber surface were further cross-linked after the molecular coordination of templates to complete the molecularly imprinting process. This approach can not only enhance the content of functional molecularly imprinted polymers without affecting structural stability, but also combines surface MI technology to fully expose and leverage the advantages of active sites. The as prepared molecularly imprinted electrospun nanofibers MIF-Zn-PMAOX/PAN-6/4 catalyzes the degradation of paraoxon with a half-life of 32 min, and MIF-Ag-PMAOX/PAN catalyzes the degradation of parathion with a half-life of 18 min. The maximum catalytic rate evidence rate enhancements nearly 3700-fold of the self-hydrolysis. Thus, the mono-amidoxime based molecularly imprinted fibers demonstrate the versatility and superiority as self-detoxifying for organophosphates.

关键词： Organophosphateshydrolysis Electrospinning Molecular imprinting

Effect of microwires diameters on the microwave properties of glass-coated microwires/dielectric composite

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Effect of microwires diameters on the microwave properties o...

Precipitation evolution and properties of Cu-15Ni-8Sn alloys via Al microalloying during ageing

第八届中国功能材料及其应用学术会议

作者： DI Yong-jiang CHEN Deng-ming cao peng-jun JIA Bi School of Metallurgical and Materials Engineering Chongqing University of Science and Technology

ISBN: (纸本)9783037859698

The microwave properties of Glass-coated FeCuNbVSiB and CoFeNiSiB microwires / dielectric composite with different microwires diameters were *** complex permeability and complex permittivity was measured by transmission/reflection(T/R) coaxial line method at the frequency range of 2-18 GHz for composite *** results show that the microwave permeability and permittivity increases with the lengthening of the microwires in *** microwave permeability,natural resonance frequency and microwave permittivity increase with the decrease of the diameter of the microwires.

关键词： Glass-coated microwires microwave properties orientation resonance

来源： cnki会议评论

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Rare Metals 2024年第10期43卷 5216-5228页

作者： Wei Luo Li-jun peng Xu-jun Mi Hao-Feng Xie Yi-Cheng cao Shu-Hui Huang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.Ltd. GRIMAT Engineering Institute Co. Ltd. General Research Institute for Nonferrous Metals School of Materials Science and Engineering South China University of Technology

Studies have shown that microalloying Cu-Ni-Sn alloys using Al inhibits discontinuous precipitation reactions;however,the mechanism has not been investigated ***,this study explored the properties and precipitation evolution of Cu-15Ni-8Sn alloys without and with 1 wt%Al（Cu-15Ni-8Sn-1Al） during ageing at 500℃ through X-ray diffraction （XRD）,scanning electron microscopy and high-angle annular dark-field scanning transmission electron *** results revealed that in Cu-15Ni-8Sn alloy,DO22ordering first occurred after spinodal decomposition,subsequently transitioning to an L12ordering phase,during which the discontinuous precipitates gradually nucleated at the grain boundaries and formed *** alloy hardness increased sharply with ordering and then decreased rapidly after reaching its peak value,due to the dominance of the discontinuous precipitation ***,the DO22ordered phase did not appear during the ageing of Cu-15Ni-8Sn-1Al alloy,and a Ni3(Alx,Sn1-x) intermetallic compound with L12structure was formed,consuming Ni and Sn atoms,thereby significantly suppressing the discontinuous precipitation reaction and improving the stability during prolonged *** tensile strength （yield strength） of Cu-15Ni-8Sn and Cu-15Ni-8Sn-1Al alloys at peak hardness were 855 （755） and 936 MPa （892 MPa）,respectively,and their main strengthening mechanisms were solid solution strengthening and precipitation *** addition of 1 wt% Al effectively improved the precipitation strengthening effect of Cu-Ni-Sn alloys but severely decreased the ductility.

关键词： Al addition Cu-15Ni-8Sn Precipitation sequence Strengthening mechanism

Exact solution of Heisenberg model with site-dependent exchange couplings and Dzyloshinsky–Moriya interaction

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Chinese Physics B 2015年第10期24卷 460-466页

作者：杨丽君曹俊鹏杨文力 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences Collaborative Innovation Center of Quantum Matter Institute of Modern Physics Northwest University Beijing Center for Mathematics and Information Interdisciplinary Sciences

We propose an integrable spin-1/2 Heisenberg model where the exchange couplings and Dzyloshinky-Moriya interactions are dependent on the sites. By employing the quantum inverse scattering method, we obtain the eigenvalues and the Bethe ansatz equation of the system with the periodic boundary condition. Furthermore, we obtain the exact solution and study the boundary effect of the system with the anti-periodic boundary condition via the off-diagonal Bethe ansatz. The operator identities of the transfer matrix at the inhomogeneous points are proved at the operator level. We construct the T -Q relation based on them. From which, we obtain the energy spectrum of the system. The corresponding eigenstates are also constructed. We find an interesting coherence state that is induced by the topological boundary.

关键词： Bethe ansatz Yang-Baxter equation T-Q relation

Brain Mechanisms Underlying Panic Attack and Panic Disorder

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Neuroscience Bulletin 2024年第6期40卷 795-814页

作者： Xuyan Guan peng cao Tsinghua Institute of Multidisciplinary Biomedical Research Tsinghua UniversityBeijing102206China National Institute of Biological Sciences(NIBS) Beijing102206China

Panic disorder is a psychiatric disorder characterized by recurrent panic attacks,with a prevalence of~4%in the general population,causing heavy personal and socioeconomic *** similarities of animal defense responses to clinical panic attack symptoms in humans make it possible to translate neuroanatomical pathways identified in animal studies to panic disorder in ***,in this review we first present a basic overview of panic disorder in humans including the main subtypes,models commonly used to trigger panic attacks,related hypotheses,the neurotransmitter systems that may be involved,and the current clinical treatments to give the reader a comprehensive understanding of panic *** animal section introduces the models that trigger panic-like behavior in animals and the brain regions that may be involved,providing insights for future elucidation of the neural circuit mechanisms behind panic attacks.

关键词： Panic disorder Panic attack Defense responses Animal studies Humans

Regulating the electronic structure of Ir single atoms by ZrO_(2)nanoparticles for enhanced catalytic oxidation of formaldehyde at room temperature

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Chinese Chemical Letters 2024年第7期35卷 200-205页

作者： Shiqi peng Yongfang Rao Tan Li Yufei Zhang jun-ji cao Shuncheng Lee Yu Huang Key Laboratory of Aerosol Chemistry&Physics State Key Laboratory of Loess and Quaternary Geology(SKLLQG)Institute of Earth EnvironmentChinese Academy of Sciences(CAS)Xi’an 710061China School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China School of Environment and Energy South China University of TechnologyGuangzhou 51006China School of Environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100190China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China

Developing low-loading single-atom catalysts with superior catalytic activity and selectivity in formaldehyde(HCHO)oxidation at room temperature remains ***,ZrO_(2)nanoparticles coupled low-loading Ir single atoms in N-doped carbon(Ir_(1)-N-C/ZrO_(2))was *** optimal Ir_(1)-N-C/ZrO_(2)with 0.25 wt%Ir loading delivers the high HCHO removal and conversion efficiency(>95%)at 20℃,which is higher than that over Ir_(1)-N-C with the same Ir *** specific rate can reach 1285.6 mmol gIr^(-1)h^(-1),surpassing the Ir based catalysts reported to *** functional theory calculation results and electron spin resonance spectra indicate that the introduction of Zr O_(2)nanoparticles modulate the electronic structure of the Ir single atoms,promoting O_(2)activation to·O_(2)^(–).Moreover,the Ir-C-Zr channel is favorable for the dissociation of·O_(2)^(–)to active oxygen atom(*O),and further accelerates the transformation of HCHO and intermediates(dioxymethylene and formates)to CO_(2)and H_(2)*** work provides a facile strategy to design low-loading single-atom catalysts with high catalytic activity toward HCHO oxidation.

关键词： ZrO_(2)nanoparticles Ir single atoms Electronic structure Formaldehyde Catalytic oxidation

A modified method for the treatment of urethral fistula after hypospadias repair

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Asian Journal of Andrology 2012年第6期14卷 900-902页

作者： Chao Qin Wei Wang Shang-Qian Wang Qiang cao Zeng-jun Wang peng-Chao Li Jie Li Ning-Han Feng Li-Xin Hua Chang-jun Yin Wei Zhang State Key Laboratory of Reproductive Medicine Department of Urology The First Affiliated Hospital of Nanjing Medical University Nanjing 210029 China

Urethrocutaneous fistula （UCF） is a common complication of hypospadias surgery for severe hypospadias. We report our experience in the management of UCF following hypospadias surgery with a prepuce-degloving method （PDM）. Our study included 87 patients who developed UCF after hypospadias repair from May 2001 to December 2011. Either simple closure or PDM was performed to repair the fistula. In total, 61 patients underwent a simple closure or Y-V plasty of the fistula, and 26 underwent a PDM repair. The success rate was 78.7% for simple closure or Y-V plasty and 96.2% for PDM repair （P〈0.05）. PDM repair represents a good choice for UCF repair after hypospadias, and our high 96.2% success rate demonstrates its applicability.

关键词： hypospadias repair urethrocutaneous fistula

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新型铁塔用钢腐蚀和力学性能研究

广州化工 2024年第14期52卷 102-105,111页

作者：于硕硕栗克建曹鹏军吕俊杰马鸣图翟进宝重庆科技大学冶金与动力工程学院重庆401331 中新(重庆)超高强材料研究院有限公司重庆401326 航塔通讯有限公司安徽宿州234000

选用一种Q235B和三种合金元素不同的Q420B铁塔用钢,通过原子发射光谱仪进行化学成分分析。选择NaCl溶液为液体环境进行动电位极化和电化学阻抗测试腐蚀性能;化学浸泡试验,研究形貌和产物;拉伸试验分析力学性能。结果表明,3种Q420B钢腐... 详细信息

选用一种Q235B和三种合金元素不同的Q420B铁塔用钢,通过原子发射光谱仪进行化学成分分析。选择NaCl溶液为液体环境进行动电位极化和电化学阻抗测试腐蚀性能;化学浸泡试验,研究形貌和产物;拉伸试验分析力学性能。结果表明,3种Q420B钢腐蚀性能优于Q235B,因Si、Cr等元素含量不同,材料表面钝化膜的稳定性存在差异,导致腐蚀性能不同;元素V含量增加,优化力学性能;通过JMatPro软件模拟证明提升Mn含量,可促进组织稳定性并改善力学性能。

关键词：铁塔用钢腐蚀性能极化曲线力学性能连续冷却曲线