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Determination of neutron-skin thickness using configurational information entropy

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Nuclear Science and Techniques 2022年第1期33卷 60-66页

作者： Chun-Wang Ma Yi-pu Liu Hui-Ling Wei jie pu Kai-Xuan Cheng Yu-Ting Wang School of Physics Henan Normal UniversityXinxiang 453007China Key Laboratory Optoelectronic Sensing Integrated Application of Henan Province Henan Normal UniversityXinxiang 453007China

Configurational information entropy(CIE)theory was employed to determine the neutron-skin thickness of neutron-rich calcium *** nuclear density distributions and fragment cross sections in 350 MeV/u ^(40-60)Ca+^(9)Be projectile fragmentation reactions were calculated using a modified statistical abrasion-ablation *** quantities were determined from the nuclear density,isotopic,mass,and charge *** linear correlations between the CIE determined using the isotopic,mass,and charge distributions and the neutron-skin thickness of the projectile nucleus show that CIE provides new methods to extract the neutron-skin thickness of neutron-rich nuclei.

关键词： Neutron-skin thickness Configurational information entropy Cross section distribution Projectile fragmentation

Confinement synthesis of bimetallic MOF-derived defect-rich nanofiber electrocatalysts for rechargeable Zn-air battery

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Nano Research 2022年第10期15卷 9000-9009页

作者： Xing Chen jie pu Xuhui Hu Le An Jianjun Jiang Yujun Li School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China Frontiers Science Center for Flexible Electronics Institute of Flexible ElectronicsNorthwestern Polytechnical UniversityXi’an 710072China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China

Zn-air batteries with high energy density and safety have acquired enormous attention,while the practical application is hindered by the sluggish kinetics of the oxygen evolution reaction(OER)and the oxygen reduction reaction(ORR).In this work,a threedimensional(3D)defect-rich bifunctional electrocatalyst(CoFe/N CNFs)comprising irregular hollow CoFe nanospheres in Ndoped carbon nanofibers is presented,which is fabricated from CoFe ZIFs-derived(ZIF:zeolitic-imidazolate framework)polymer nanofibers *** CoFe ZIFs with tunable particle size and composition are constructed using a confined synthesis ***,the Kirkendall diffusion process is available for forming the irregular hollow CoFe nanospheres,and the decomposition of polyvinylpyrrolidone(PVP)results in forming the defective carbon nanofibers,which provide more efficient active sites and enhance the electrocatalytic properties toward both OER and *** optimized CoFe/N CNFs exhibit superior bifunctional activities,outperforming that of the benchmark Pt/C+RuO_(2) *** a result,the CoFe/N CNFs as an air-cathode endow the rechargeable Zn-air battery with an excellent power density of 149 mW·cm^(−2),energy density of 875 Wh·kg^(−1),and cycling *** work provides a new strategy to develop bifunctional electrocatalysts with desired nanostructure and regulated performance toward energy applications.

关键词： defect-rich electrocatalyst hollow structure carbon fiber metal-organic framework Zn-air battery

Experimental study on the compressive performance of new sandwich masonry walls

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Frontiers of Structural and Civil Engineering 2013年第2期7卷 154-163页

作者： Jianzhuang XIAO jie pu Yongzhong HU Department of Building Engineering Tongji UniversityShanghai 200092China

Sandwich masonry wall,namely,multi-leaf masonry wall,is widely applied as energy-saving wall since the interlayer between the two outer leaves can act as insulation *** types of sandwich walls keep appearing in research and application,and due to their unique connection patterns,experimental studies should be performed to investigate the mechanical behavior,especially the compressive performance.3 new types of sandwich masonry wall were investigated in this paper,and 3 different technical measures were considered to guarantee the cooperation between the two leaves of the *** on the compression tests of 13 specimens,except for some damage patterns similar with the conventional masonry walls,several new failure patterns are found due to unique connection construction *** were made between the tested compression capacity and the theoretical one which was calculated according to the Chinese Code for Design of Masonry *** results indicate that the contributions of the 3 technical measures are *** modification coefficient(γ)was suggested to evaluate the contribution of the technical measures on the compression capacity,and then a formula was proposed to evaluate the design compression capacity of the new sandwich masonry walls.

关键词： sandwich wall insulation wall connection compressive performance compression test

Single-centre study comparing standard apical dissection with a modified technique to facilitate vesico-urethral anastomosis during laparoscopic radical prostatectomy

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Asian Journal of Andrology 2011年第3期13卷 494-498,515页

作者： Xin Gao Xiao-Yong pu jie Si-Tu Wen-Tao Huang Department of Urology the Third Affiliated Hospital Sun Yat-Sen University Guangzhou 510630 China

A modified apical dissection of the prostate to improve the efficiency of vesico-urethral anastomosis （VUA） in laparoscopic radical prostatectomy （LRP） was reported. A total of 42 patients were randomly selected and enrolled in this study. A standard LRP was performed in 21 patients （group 1）, whereas a novel, modified apical dissection of the prostate in LRP was performed in another 21 patients （group 2）. Surgical data, total operative time, VUA time, extravasation rate, catheterisation time, occurrence of anastomotic strictures, and the early and late continence rates were analysed statistically. No differences in clinical or pathological characteristics were determined between the two groups. The total operative time, VUA time, blood loss and catheterisation time were lower in group 2, which received the novel, modified technique compared with group 1, which received the standard technique to dissect the apex of the prostate （P〈0.01 for each variable）. Regarding the extravasation rate and the occurrence of anastomotic strictures, no significant differences were found between the two groups （P〉0.0.05 for each）. After catheter removal, a statistically significant difference in the continence rates was present at 3 and 30 days post operation in the two groups （P〈0.01, respectively）. At 90 days post operation, the difference, although still present, was no longer statistically significant （P〉0.05）. The novel, modified apical dissection of the prostate facilitates the VUA and significantly improves the efficacy of the procedure and early restoration of continence.

关键词： continence laparoscopic technique radical prostatectomy vesico-urethral anastomosis

Non-frozen process of heavy-ion fusion reactions at deep sub-barrier energies

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Nuclear Science and Techniques 2022年第10期33卷 117-125页

作者： Kai-Xuan Cheng jie pu Yu-Ting Wang Ya-Fei Guo Chun-Wang Ma School of Physics Henan Normal UniversityXinxiang 453007China

The hindrance in heavy-ion fusion reactions a deep sub-barrier energies is investigated using the double folding model with a hybrid method between the frozen and adiabatic density *** this method,the density distributions of the projectile and the target depend closely on the distance between *** the distance decreased,the half-density radii of the colliding nucle gradually increased to the half-density radius of the compound *** total potential based on this non-frozen approximation generates a slightly shallower pocket and becomes more attractive inside the pocket compared to that obtained from the frozen approximation.A damping factor was used to simulate the decline of the coupled channel effects owing to the density rearrangement of the two colliding *** calculated fusion cross-sections and astrophysical S factors at the deep sub-barrier energies are both in good agreement with the experimental data for the medium-heavyNi+Ni and medium-lightMg+Si mass *** addition,it was concluded that the apparent maximum of the S factors most likely appears in fusion systems with strong coupling effects.

关键词： Adiabatic approximation Double folding model Fusion hindrance

A 10-bit 110 MHz SAR ADC with asynchronous trimming in 65-nm CMOS

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Journal of Semiconductors 2017年第4期38卷 94-102页

作者： Daiguo Xu Shiliu Xu Xi Li jie pu School of Microelectronics and Solid-State Electronics University of Electronic Science and Technology of ChinaChengdu 611731China Science and Technology on Analog Integrated Circuit Laboratory Chongqing 400060China Sichuan Institute of Solid-State Circuits Chongqing 400060China

A 10-bit 110 MHz SAR ADC with asynchronous trimming is *** this paper,a high linearity sampling switch is used to produce a constant parasitical barrier capacitance which would not change with the range of input *** a result,the linearity of the SAR ADC will increase with high linearity sampled *** more,a high-speed and low-power dynamic comparator is proposed which would reduce the comparison time and save power consumption at the same time compared to existing ***,the proposed comparator provides a better performance with the decreasing of power ***,a highspeed successive approximation register is exhibited to speed up the conversion time and will reduce about 50%register ***,an asynchronous trimming method is provided to make the capacitive-D AC settle up completely instead of using the redundant cycle which would prolong the whole conversion *** SAR ADC is implemented in 65-nm CMOS technology the core occupies an active area of only 0.025 mm-2 and consumes 1.8 *** SAR ADC achieves SFDR 〉 68 dB and SNDR 〉 57 dB,resulting in the FOM of 28 f J/*** the test results,the presented SAR ADC provides a better FOM compared to previous research and is suitable for a kind of ADC IP in the design SOC.

关键词： analog-to-digital converter asynchronous trimming high-speed successive approximation register

A possible probe to neutron-skin thickness by fragment parallel momentum distribution in projectile fragmentation reactions

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Nuclear Science and Techniques 2024年第6期35卷 114-119页

作者： Chun-Wang Ma Yi-jie Duan Ya-Fei Guo Chun-Yuan Qiao Yu-Ting Wang jie pu Kai-Xuan Cheng Hui-Ling Wei College of Physics Henan Normal UniversityXinxiang 453007China Institute of Nuclear Science and Technology Henan Academy of SciencesZhengzhou 450015China

Neutron-skin thickness is a key parameter for a neutron-rich nucleus;however,it is difficult to *** the framework of the Lanzhou Quantum Molecular Dynamics(LQMD)model,a possible probe for the neutron-skin thickness(δ_(np))of neutron-rich ^(48)Ca was studied in the 140A MeV ^(48)Ca+^(9)Be projectile fragmentation reaction based on the parallel momentum distribution(p∥)of the residual fragments.A Fermi-type density distribution was employed to initiate the neutron density distributions in the LQMD simulations.A combined Gaussian function with different width parameters for the left side(Γ_(L))and the right side(Γ_(R))in the distribution was used to describe the p∥of the residual *** neutron-rich sulfur isotopes as examples,Γ_(L) shows a sensitive correlation withδ_(np) of ^(48)Ca,and is proposed as a probe for determining the neutron skin thickness of the projectile nucleus.

关键词： Neutron-skin thickness Projectile fragmentation Parallel momentum distribution Neutron-rich nucleus Quantum molecular dynamics model

Materials and structural design for preferable Zn deposition behavior toward stable Zn anodes

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SmartMat 2024年第1期5卷 1-37页

作者： Qinghe Cao Yong Gao jie pu Abdelnaby M.Elshahawy Cao Guan Key Laboratory of Flexible Electronics of Zhejiang Province Ningbo Institute of Northwestern Polytechnical UniversityNingboChina Institute of Flexible Electronics Northwestern Polytechnical UniversityXi'anChina Department of Physics Faculty of ScienceAssiut UniversityAssiutEgypt

Benefiting from the high capacity of Zn metal anodes and intrinsic safety of aqueous electrolytes,rechargeable Zn ion batteries(ZIBs)show promising application in the post‐lithium‐ion period,exhibiting good safety,low cost,and high energy ***,its commercialization still faces problems with low Coulombic efficiency and unsatisfied cycling performance due to the poor Zn/Zn2+reversibility that occurred on the Zn *** improve the stability of the Zn anode,optimizing the Zn deposition behavior is an efficient way,which can enhance the subsequent striping efficiency and limit the dendrite *** Zn deposition is a controlled kinetics‐diffusion joint process that is affected by various factors,such as the interaction between Zn2+ions and Zn anodes,ion concentration gradient,and current *** this review,from an electrochemical perspective,we first overview the factors affecting the Zn deposition behavior and summarize the modification ***,strategies proposed for interfacial modification and 3D structural design as well as the corresponding mechanisms are ***,the existing challenges,perspectives on further development direction,and outlook for practical applications of ZIBs are proposed.

关键词： 3D structuraldesign interfacialmodification long‐term stability Znanode Zndeposition behavior

The Symmetry Energy from the Neutron-Rich Nucleus Produced in the Intermediate-Energy 40,48Ca and 58,64Ni Projectile Fragmentation

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Chinese Physics Letters 2012年第6期29卷 90-93页

作者： MA Chun-Wang pu jie WANG Shan-Shan WEI Hui-Ling Department of Physics Henan Normal UniversityXinxiang 453007

In the framework of a modified Fisher model,using the isobaric yield ratio method,we investigate the fragments produced in the 140 A Me V 40,48Ca+9Be and 58,64Ni+9Be projectile fragmentation *** different approximation methods,asym/T (the ratio of symmetry-energy coefficient to temperature) of symmetric and neutron-rich fragments are *** is found that asym/T of fragments depend on the reference nucleus and the neutron excess of *** asym/T of the isobar decreases when the neutron-excess of the isobar increases,while for a fragment with the same neutron-excess,asym/T increases as the mass of the fragment increases but saturate when the mass of the fragment becomes larger.

关键词： excess symmetry fragmentation