期刊：
EUROPEAN PHYSICAL JOURNAL A,2022年58(9):1-19 ISSN：1434-6001
通讯作者：
Xiao-Hua Li
作者机构：
[Zhu, De-Xing; Li, Xiao-Hua; Xu, Yang-Yang; Chen, Xun] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wu, Xi-Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[He, Biao] Cent South Univ, Coll Phys & Elect, Changsha 410083, Peoples R China.;[Li, Xiao-Hua] Univ South China, Natl Exemplary Base Int Sci & Tech Collaborat Nuc, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.
通讯机构：
[Xiao-Hua Li] S;School of Nuclear Science and Technology, University of South China, Hengyang, People’s Republic of China<&wdkj&>National Exemplary Base for International Sci and Tech. Collaboration of Nuclear Energy and Nuclear Safety, University of South China, Hengyang, People’s Republic of China<&wdkj&>Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, Hengyang, People’s Republic of China<&wdkj&>Key Laboratory of Low Dimensional Quantum Structures and Quantum Control, Hunan Normal University, Changsha, People’s Republic of China
摘要：
Based on the Hatsukawa formula (Hatsukawa et al. in Phys Rev C 42:674, 1990), modifying the coefficient F(Z) and considering the blocking effect of unpaired nucleons, in our previous work (Xu and Liu in Eur Phys J A 58:16, 2022) we proposed an improved semi-empirical formula for evaluating the favored
$$\alpha $$
decay half-lives. In this work, considering the contribution of centrifugal potential, we generalize this formula to unfavored
$$\alpha $$
decay and propose a unified formula for
$$\alpha $$
decay half-lives. Using this formula, we systematically calculate the unfavored
$$\alpha $$
decay half-lives of 130 odd-A and 78 odd–odd nuclei with the corresponding root-mean-square (rms) deviations being 0.503 and 0.603, respectively. Meanwhile the rms deviation of
$$\alpha $$
decay half-lives for all the 700 nuclei taken from NUBASE2020 is only 0.380. Moreover, we extend this formula to predict the
$$\alpha $$
decay half-lives of 144 even–even, odd-A and odd–odd nuclei with Z = 117, 118, 119 and 120. For comparison, the unitary Royer formula (DZR) (Deng et al. in Phys Rev C 101:034307, 2020) proposed by Deng et al. and the modified universal decay law (MUDL) (Soylu and Qi in Nucl Phys A 1013:122221, 2021) proposed by Soylu et al. are also used. The predictions of these formulas are basically consistent with each other.
通讯机构：
[Liu, Jianwen] S;Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
关键词：
Coordination effect;Methanol selective oxidation;NiMoO4;Formate;Energy-saving hydrogen production
作者机构：
[Cheng, Jun-Hao; Li, Xiao-Hua] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zhang, Zhen] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China.;[Wu, Xi-Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Chu, Peng-Cheng] Qingdao Technol Univ, Sch Sci, Qingdao 266000, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.
关键词：
proton radioactivity;Skyrme;Hartree-Fock;macroscopic quantities of nuclear matter
摘要：
In this study, we systematically investigate the proton radioactivity half-lives of 33 spherical nuclei based on the relationship between Skyrme parameters and the macroscopic quantities of nuclear matter. Using the two-potential approach with the spherical Skyrme-Hartree-Fock model, the correlation between proton radioactivity half-life and the macroscopic quantities is analyzed. Moreover, we obtain a new Skyrme parameter set by fitting the two most weighted macroscopic quantities. Compared with the Skyrme parameters MSL0 and the theoretical model of proton radioactivity UDLP, the theoretical proton radioactivity half-life calculated using the new Skyrme parameter set can better reproduce the experimental data.
摘要：
The scratching-induced material removal behavior and mechanism of single-crystal AlN using single diamond abrasive were studied at atomic level through molecular dynamics simulation and nanowear test. A minimum removal thickness of monolayer is achieved on Al-terminated AlN(0001) surface in simulation. Dislocations and stacking fault constitute the main subsurface lattice damage and demonstrate positive correlations with the scratching depth. Both simulated and experimental results suggest that the plasticity-dominated nanowear of AlN can be properly described with the Archard-type model that relates the wear volume linearly to the normal load in a limited load range, but cannot be maintained at high load. This work provides atomic-level insights into mechanical material attrition of AlN and contributes basic knowledge to ultraprecision surface machining.
作者机构：
[Qiu, Chanjun; Shen, Longzhang] Univ South China, Sch Resources Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Qiu, Chanjun; Shen, Longzhang; Zhu, Hongmei; Chen, Yong; Lei, Yuantao] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Chanjun Qiu] S;School of Resources, Environment and Safety Engineering, University of South China, Hengyang 421001, China<&wdkj&>School of Mechanical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
Titanium alloys are famous for their light weight, high strength, and heat- and corrosion-resistant properties. However, the excellent mechanical properties are closely related to its microstructure. Innovative machining operations are required for the welding, surface strengthening, and repairs to ensure the refining of the crystalline structure for improved strength requirements, enhanced mechanical properties, and integrating strength. By direct laser melting on the surface of Ti-6Al-4V alloy, the differences of molten pools under continuous and modulated laser mode were compared in the article. Under the same power, the heat influence zone of the laser pool could be reduced to 1/3 of that of the continuous laser. The deep molten pool could be obtained by a continuous laser by the action of high energy density. The tensile property changed a lot between different depths of melt penetration. A high-density, fine-grain molten pool could be obtained under the action of a high-frequency (20 kHz) modulation laser. The mechanical properties of the tensile sample between different depths of melt penetration, which contained the remelting zone, were close to the substrate. The research conclusions can provide technical support for the development of laser remelting processing technology.
通讯机构：
[Qishui Yao] D;Department of Mechanical Engineering, Hunan University of Technology, Zhuzhou City 412007, PR China
关键词：
Inverse problem;Interval model;Densifying strategy;Surrogate model based method;Radial basis functions
摘要：
A surrogate model based active interval densifying method is proposed to solve the uncertain nonlinear inverse problem providing an efficient tool for the unknown inputs identifications by using limited information of un-certain outputs. The active interval is first defined to determine the key input interval whose bounds would strongly influence the upper and lower bounds of the outputs, and then an active vertex densifying strategy is proposed by combining the active interval and vertex method to further reduce the number of densifying samples. A novel iterative mechanism is developed to sequentially densify the active interval vector to construct a more precise surrogate model. Therefore, the interval inverse problem is transformed into a series of surrogate model based interval inverse problems and densifies the sample set that is sequentially solved, which could improve the computational efficiency and expand the application area of existing surrogate model based methods for nonlinear inverse problems. Moreover, it is hopeful to be applied to heat conduction, structural parameters and dynamic load identifications. A numerical example and two practical engineering applications are used to verify its feasibility, computational accuracy and efficiency.
作者机构：
[Qian, Xitang; Li, Zhenye; Wang, Gaoyang] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;[Ying, Lei; Cao, Yong] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China.
通讯机构：
[Xitang Qian; Zhenye Li] C;[Lei Ying] I;Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 P. R. China<&wdkj&>College of Mechanical Engineering, University of South China, Hengyang, 421001 P. R. China
关键词：
all-polymer solar cells;large-area devices;solvent additives
摘要：
1,8‐diiodooctane (DIO) remains in the formed film because of its high boiling point, promoting the evolution of bulk heterojunction (BHJ) films, resulting in a relatively consistent surface roughness and phase separation scales in the large‐area regions. DIO promotes significantly enhanced crystallization of N2200, thus facilitating charge transport and boosting the µe of large‐area devices. DIO promotes vertical phase separation of BHJ films, which helps to improve the charge extraction efficiency and reduce charge recombination, thereby restraining the PCE loss of large‐area device. Abstract Small‐area all‐polymer solar cells (all‐PSCs) have obtained excellent power conversion efficiency (PCE) through smart design of materials and advanced device fabrication. Nevertheless, commercialization of all‐PSCs requires the urgent development of large‐area all‐PSCs processing techniques compatible with roll‐to‐roll processing. Generally, the PCE of all‐PSCs drops sharply with the increased device area, which is the biggest obstacle for fabrication of large‐area all‐PSCs toward commercialization. Morphology modulation of bulk heterojunction (BHJ) film may be an effective strategy for fabrication of large‐area all‐PSCs. In this work, a solvent additive 1,8‐diiodooctane (DIO) is introduced to regulate the charge transport, molecular orientation, and BHJ film morphology of all‐PSCs. As the device area of all‐PSCs expands from 0.04 to 0.5 cm2, the PCE of the device without DIO reduces by 14.8%, while that of the device with DIO only reduces by 3.3%. To the best of the authors’ knowledge, this is the lowest PCE attenuation value achieved for 0.5–1 cm2 all‐PSCs. The DIO solvent additive is also applicable to other efficient all‐PSCs, which proves the advance of generic solvent additive concept for constructing high‐performance large‐area all‐PSCs, and may push forward the commercialization process of all‐PSCs.
通讯机构：
[Gui-Gen Wang] S;[Man-Lin Tan] R;[Hui Ying Yang] P;Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore<&wdkj&>Shenzhen Key Laboratory for Advanced Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, PR China<&wdkj&>Research Institute of Tsinghua University in Shenzhen, Shenzhen 518055, PR China
摘要：
To achieve high-performance aqueous rechargeable alkaline batteries (ARABs), durable and high-rate anode materials should be developed. Bi-based materials have always been considered as promising anodes due to their enormous capacity, adequate negative operating voltage range, and three-electron redox characteristics. None-theless, the poor kinetics and low cycling stability of bi-based materials have severely limited their applications for ARABs. Here inspired by the unique structural characteristic of two-dimensional (2D) materials with a fast ion diffusion channel and relatively robust structure, 2D/2D Bi2O2S@rGO nanosheets were synthesized using a one-step hydrothermal process as the anode material for ARABs. At a current density of 1 A g-1, the as-optimized anodes exhibit a high specific capacity of 250.51 mAh g- 1. Using Bi2O2S@rGO NSs as the anode and (NiCo)9S8 as the cathode, the full cell exhibit a high energy density of 82.91 W h kg-1, a high power density of 7.59 kW kg-1, and excellent cycling stability, with a capacity retention rate of 92.74% after 5,000 cycles. This work could open up a way for environmentally friendly and high-performance anode materials.
期刊：
Journal of Materials Chemistry C,2022年10(17):6710-6716 ISSN：2050-7526
通讯作者：
Peng, Feng;Ying, L
作者机构：
[Ying, Lei; Li, Jingwen; Li, Zhenye; Peng, Feng; Zhong, Zhiming; Huang, Fei; Cao, Yong; Ying, L; Peng, F; Wu, Hongbin] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.;[Qian, Xitang; Li, Zhenye] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;[Ying, Lei; Peng, Feng; Zhong, Zhiming; Huang, Fei; Ying, L; Peng, F] South China Inst Collaborat Innovat, Dongguan 523808, Peoples R China.
通讯机构：
[Ying, L ; Peng, F] S;South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.;South China Inst Collaborat Innovat, Dongguan 523808, Peoples R China.
作者机构：
[Guo, Jian] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Chen, Lei; Qian, Linmao; Gao, Jian; Xiao, Chen] Southwest Jiaotong Univ, Tribol Res Inst, State Key Lab Tract Power, Chengdu 610031, Peoples R China.;[Xiao, Chen] Adv Res Ctr Nanolithog ARCNL, Sci Pk 106, NL-1098XG Amsterdam, Netherlands.;[Chen, Lei; Qian, Linmao] Southwest Jiaotong Univ, Technol & Equipment Rail Transit Operat & Mainten, Chengdu 610031, Peoples R China.
通讯机构：
[Chen Xiao; Lei Chen] T;Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China<&wdkj&>Advanced Research Center for Nanolithography (ARCNL), Amsterdam, The Netherlands<&wdkj&>Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China<&wdkj&>Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu, China
作者机构：
[Xiao, Jin] Hunan Univ Technol, Sch Sci, Zhuzhou 412007, Peoples R China.;[Zhou, Juan] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;[Chen, Ling-Na] Univ South China, Comp Sch, Hengyang 421001, Peoples R China.;[Chen, Jian] Changsha Univ Sci & Technol, Coll Energy & Power Engn, Changsha 410076, Peoples R China.
通讯机构：
[Ling-Na Chen] C;Computer School, University of South China , Hengyang 421001, China
摘要：
Based on first-principles calculations, the diffusion properties of Na+ in bilayer MoS2 and the MoS2-WS2 heterojunction were investigated. Owing to the similar structures, the diffusion properties of Na are almost identical in both systems. On perfect surfaces, the diffusion energy barrier is smaller than 0.1 eV. The diffusion characteristics of Na+ ions between layers are related to the size of the system. For a small size (<3 nm(2)), the Na+ diffusion energy barrier is around 0.40 eV because of sliding between layers. With the size of the system increasing, the energy barrier for Na+ diffusion between layers increases to 0.90 eV. S vacancy defects can trap Na+ ions and hinder Na+ diffusion. The diffusion energy barrier on the surface with S vacancy defects will increase to around 0.5 eV. When Na ions are transported between layers, they are tightly bound by S vacancy defects. The energy barrier exceeds 2.0 eV. (C) 2022 Author(s).
作者机构：
[Lei, Zeyong; Deng, Jian; Zhong, Lin] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zhao, Guanrong; Lei, Zeyong; Deng, Jian] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Lei, Jieheng] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Zeyong Lei] S;School of Nuclear Science and Technology, University of South China, Hengyang 421001, China<&wdkj&>School of Mechanical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
Aluminum alloys have been widely utilized in automobiles, aircraft, building structures, and high-speed railways industries due to their excellent structural and mechanical properties. Surface oxide film removal prior to aluminum alloy welding and old paint removal prior to repainting aluminum alloy surfaces are critical factors in ensuring the welding quality and service life of aluminum alloy products. Because of its unique advantages, such as environmental protection and precision control, laser-controlled cleaning has great application potential as a surface cleaning technology in removing oxide films and paint layers on aluminum alloy surfaces. In this paper, the mechanism of laser cleaning of oxide films and paint layers on aluminum alloy is discussed. Furthermore, the impact of various processing parameters such as laser beam power, energy density, scanning speed, and so on is analyzed in detail. After laser cleaning, the corrosion resistance, welding performance, adhesive performance, and other properties of the aluminum alloy are optimized. This paper also discusses several real-time detection technologies for laser cleaning. A summary and the development trend are provided at the end of the paper.
通讯机构：
[Fengwei Yuan] S;School of Mechanical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
With the increase in the amount of 3D point cloud data and the wide application of point cloud registration in various fields, the question of whether it is possible to quickly extract the key points of registration and perform accurate coarse registration has become a question to be urgently answered. In this paper, we proposed a novel semantic segmentation algorithm that enables the extracted feature point cloud to have a clustering effect for fast registration. First of all, an adaptive technique was proposed to determine the domain radius of a local point. Secondly, the feature intensity of the point is scored through the regional fluctuation coefficient and stationary coefficient calculated by the normal vector, and the high feature region to be registered is preliminarily determined. In the end, FPFH is used to describe the geometric features of the extracted semantic feature point cloud, so as to realize the coarse registration from the local point cloud to the overall point cloud. The results show that the point cloud can be roughly segmented based on the uniqueness of semantic features. The use of a semantic feature point cloud can make the point cloud have a very fast response speed based on the accuracy of coarse registration, almost equal to that of using the original point cloud, which is conducive to the rapid determination of the initial attitude.
作者机构：
[Liu, He; Chu, Peng-Cheng; Wang, Yi-Nong] Qingdao Univ Technol, Res Ctr Theoret Phys, Sci Sch, Qingdao 266033, Peoples R China.;[Li, Xiao-Hua] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Zhang, Jia-Wei] Chongqing Univ Sci & Technol, Dept Phys, Chongqing 401331, Peoples R China.
摘要：
We investigate the properties of equation of state, the quark fraction, the isospin chemical potential, and the entropy per baryon of strange quark matter at finite temperature under constant magnetic field within the quasiparticle model. We find that both the effects of temperature and magnetic field can significantly influence the thermodynamical properties of quark matter. Our result also indicates that the maximum mass of protoquark stars (PQSs) increases with the heating process along the star evolution, and the core temperature of the maximum mass of PQSs depends on the different snapshots by considering the isentropic stages along the star evolution line.
