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学者姓名：李钒
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摘要 ：
Given the current complex heterogeneous network environment, choosing different networks in different user scenarios limits the effectiveness of network access. To solve this problem, an algorithm based on DDQN is proposed to optimize the network configuration. The reward value is determined by service type, throughput, delay, and signal strength. DDQN can avoid the ping-pong effect that can be generated by network selection and stabilize the network environment by splitting action selection and action evaluation to prevent overestimation. The experimental results show that the algorithm can autonomously select and assign network protocols and can more accurately find network access methods suitable for user scenarios than the current network switching method represented by a single network parameter based on RSSI and CCA. © Published under licence by IOP Publishing Ltd.
关键词 ：
Internet protocols Internet protocols Heterogeneous networks Heterogeneous networks Wireless networks Wireless networks
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| GB/T 7714 | Wang, Chongyang , Yan, Hairong , Li, Fan . Self-selection Protocol Algorithm for Wireless Networks based on DDQN [C] . 2021 . |
| MLA | Wang, Chongyang 等. "Self-selection Protocol Algorithm for Wireless Networks based on DDQN" . (2021) . |
| APA | Wang, Chongyang , Yan, Hairong , Li, Fan . Self-selection Protocol Algorithm for Wireless Networks based on DDQN . (2021) . |
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摘要 ：
提高农业转移人口的进城落户意愿是推动户籍人口城镇化发展的重要途径.然而,当下各地农业转移人口进城落户积极性不高,提升户籍人口城镇化率并不乐观.基于推拉理论,利用中国流动人口动态监测调查数据(CMDS),采用二元Logit模型与中介效应模型,分析土地资源禀赋对农业转移人口进城落户意愿的影响,探讨两者间的作用机制.结果表明,农业转移人口进城落户意愿总体较低,占比为48.91％,农业转移人口拥有承包地与宅基地的比例分别为61.40％和71.71％.土地资源禀赋显著抑制了农业转移人口的进城落户意愿,农业转移人口的身份认同、社会交往状况在土地资源禀赋影响进城落户意愿的过程中发挥着中介效应,社会保障状况发挥着显著的负向调节效应.进一步研究发现,土地流转将会提高农业转移人口的进城落户意愿.因此,一方面要加快农村土地制度改革与农民土地权益保障机制设计,消除阻碍农业转移人口进城落户的体制障碍;另一方面也要通过土地为农业转移人口留条退路,增强社会结构的弹性,维护社会稳定.
引用：
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| GB/T 7714 | 李帆 , 冯虹 . 土地资源禀赋对农业转移人口进城落户意愿的影响研究 [J]. | 农业现代化研究 , 2021 , 42 (3) : 441-450 . |
| MLA | 李帆 等. "土地资源禀赋对农业转移人口进城落户意愿的影响研究" . | 农业现代化研究 42 . 3 (2021) : 441-450 . |
| APA | 李帆 , 冯虹 . 土地资源禀赋对农业转移人口进城落户意愿的影响研究 . | 农业现代化研究 , 2021 , 42 (3) , 441-450 . |
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摘要 ：
一种聚合物固态聚电解质的改性方法，属于固态聚电解质隔膜技术领域。本发明采用PEO改性的纳米TiO2，然后与聚环氧烷‑聚苯醚类共聚物复合，有效地改善了无机颗粒与PEO聚合物基体的相容性，使得TiO2纳米颗粒更加均匀地分散在有机聚合物基体中，提高PEO链段的运动能力，进而有效降低了聚合物的结晶度，提高了其离子电导率。
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| GB/T 7714 | 郭红霞 , 秦周阳 , 程一辰 et al. 一种聚合物固态聚电解质的改性方法 : CN202110122226.9[P]. | 2021-01-28 . |
| MLA | 郭红霞 et al. "一种聚合物固态聚电解质的改性方法" : CN202110122226.9. | 2021-01-28 . |
| APA | 郭红霞 , 秦周阳 , 程一辰 , 李明晔 , 王子莹 , 刘孟茜 et al. 一种聚合物固态聚电解质的改性方法 : CN202110122226.9. | 2021-01-28 . |
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摘要 ：
The magnetic property of soft magnetic material is much dependent on its shape and anisotropy. In this work, the flake-like FeNi3 particles with 3D-network structure have been synthesized through hydrazine reduction at ambient condition in the presence of sodium lignosulfonate (SLS). The morphology and crystalline structure of the FeNi3 nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and energy dispersion spectrum (EDS). Both of the static and dynamic magnetic property of the FeNi3 particles were investigated. The results indicated that the morphology of the FeNi3 particles changed from spherical to flake shape with increasing SLS concentration or reaction time. The possible mechanism on the variation of particles morphology was proposed. The static magnetic property indicated that the flake-like FeNi3 showed a higher saturation magnetization and coercivity than that of the spherical particles. Dynamic magnetic performance showed that the flake-like FeNi3 particles also exhibited significantly higher real part (μ') and imaginary part (μ') of the complex permeability than the spherical particles, especially in the range 0.6–1.0 GHz. © 2021 The Society of Powder Technology Japan
关键词 ：
Binary alloys Binary alloys High resolution transmission electron microscopy High resolution transmission electron microscopy Iron alloys Iron alloys Iron metallography Iron metallography Magnetic bubbles Magnetic bubbles Magnetic properties Magnetic properties Morphology Morphology Nanocrystalline materials Nanocrystalline materials Nanoparticles Nanoparticles Nickel metallography Nickel metallography Nitrogen compounds Nitrogen compounds Saturation magnetization Saturation magnetization Scanning electron microscopy Scanning electron microscopy Sodium Sodium Soft magnetic materials Soft magnetic materials Spheres Spheres Synthesis (chemical) Synthesis (chemical)
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| GB/T 7714 | Guo, Hongxia , Li, Mingye , Qin, Zhenping et al. Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate [J]. | Advanced Powder Technology , 2021 , 32 (3) : 755-763 . |
| MLA | Guo, Hongxia et al. "Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate" . | Advanced Powder Technology 32 . 3 (2021) : 755-763 . |
| APA | Guo, Hongxia , Li, Mingye , Qin, Zhenping , Li, Fan , Zhang, Xuehong , Wu, Wenzheng et al. Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate . | Advanced Powder Technology , 2021 , 32 (3) , 755-763 . |
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摘要 ：
Here, an in situ N incorporation method was developed to boost the efficiency and durability of CoMoS4 electrocatalyst for hydrogen evolution. Theoretical and experimental results reveal that such modification not only reduces the energy barrier of H* desorption by decreasing the electron densities around active metal sites, but also decreases the leaching rates of the metal ions with enhanced stability.
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| GB/T 7714 | Hu Peng , Che Haibing , Zhou Qinqin et al. Boosting the efficiency and stability of CoMoS4 by N incorporation for electrocatalytic hydrogen evolution. [J]. | Chemical communications , 2021 , 57 (22) : 2760-2763 . |
| MLA | Hu Peng et al. "Boosting the efficiency and stability of CoMoS4 by N incorporation for electrocatalytic hydrogen evolution." . | Chemical communications 57 . 22 (2021) : 2760-2763 . |
| APA | Hu Peng , Che Haibing , Zhou Qinqin , Zhou Wenyuan , Li Yangzhong , Li Fan et al. Boosting the efficiency and stability of CoMoS4 by N incorporation for electrocatalytic hydrogen evolution. . | Chemical communications , 2021 , 57 (22) , 2760-2763 . |
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摘要 ：
Manganese oxide composites with mixed valence states were prepared through the hydrothermal method by compositing with Ti4O7 and calcining at different temperatures, and their ORR and OER catalytic performance were investigated. The prepared catalysts were characterized by XRD, SEM-EDS, HRTEM-EDS, and XPS methods to analyse their phase constitution, morphology feature, and surface composition. The major phase of manganese oxides was Mn3O4, which is a one-dimensional structure, and its growth was induced by Ti4O7. The ORR and OER catalytic activity can be enhanced due to the preferred orientation of manganese oxides. Electrochemical measurements, namely CV, LSV and EIS, were utilized for determining the ORR and OER catalytic activity, whereas CA and ADT were used for studying the durability and stability. A Li-O2 battery was assembled to test the electrochemical behavior and properties in practical application. MnOx/Ti4O7 calcined at 300 °C exhibited the best catalytic activity of 0.72 V vs. RHE half-wave potential for ORR and 0.67 V vs. RHE overpotential for OER. The proportion of Mn3+ was also highest in all the MnOx/Ti4O7 composites. The assembled Li-O2 battery shows high performance with a voltage gap of only 0.85 V. Therefore, it can be affirmed that the inducement of Ti4O7 could strengthen the preferred orientation in manganese oxide growth and Mn3+ in MnOx/Ti4O7 plays a vital role in catalyzing ORR and OER, with both improving the ORR and OER bifunctional catalytic performance of manganese oxides. © The Royal Society of Chemistry.
关键词 ：
Calcination Calcination Catalyst activity Catalyst activity Electrolytic reduction Electrolytic reduction Lithium-air batteries Lithium-air batteries Lithium compounds Lithium compounds Manganese oxide Manganese oxide Morphology Morphology Oxide minerals Oxide minerals Oxygen Oxygen Oxygen evolution reaction Oxygen evolution reaction Oxygen reduction reaction Oxygen reduction reaction
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| GB/T 7714 | Bai, Fan , Xu, Lincheng , Wang, Daode et al. Effect of the valence state of Mn in MnO: X/Ti4O7composites on the catalytic performance for oxygen reduction reaction and oxygen evolution reaction [J]. | RSC Advances , 2021 , 11 (3) : 1524-1530 . |
| MLA | Bai, Fan et al. "Effect of the valence state of Mn in MnO: X/Ti4O7composites on the catalytic performance for oxygen reduction reaction and oxygen evolution reaction" . | RSC Advances 11 . 3 (2021) : 1524-1530 . |
| APA | Bai, Fan , Xu, Lincheng , Wang, Daode , An, Li , Hao, Zhanzhong , Li, Fan . Effect of the valence state of Mn in MnO: X/Ti4O7composites on the catalytic performance for oxygen reduction reaction and oxygen evolution reaction . | RSC Advances , 2021 , 11 (3) , 1524-1530 . |
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摘要 ：
化学素养是大学生科学素养的重要组成部分.为了更好地培养学生的化学科学素养,探讨在通识教育课堂上如何改革课堂形式来激发学生的学习兴趣,根据课程的培养目的以及选修该课的学生特点,探索在生活化学实验中开展知识竞赛教学环节.几年来的教学实践表明,知识竞赛教学环节不仅激发了学生的学习兴趣,而且调动了学生的学习积极性,更有利于培养学生的化学科学素养.
关键词 ：
生活化学实验 生活化学实验 化学素养 化学素养 知识竞赛 知识竞赛
引用：
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| GB/T 7714 | 刘淑珍 , 陈永宝 , 訾学红 et al. 生活化学实验知识竞赛教学环节的探索 [J]. | 实验室研究与探索 , 2020 , 39 (3) : 208-210,240 . |
| MLA | 刘淑珍 et al. "生活化学实验知识竞赛教学环节的探索" . | 实验室研究与探索 39 . 3 (2020) : 208-210,240 . |
| APA | 刘淑珍 , 陈永宝 , 訾学红 , 李钒 . 生活化学实验知识竞赛教学环节的探索 . | 实验室研究与探索 , 2020 , 39 (3) , 208-210,240 . |
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摘要 ：
将微视频的创意及快速制作的特点与基础化学实验教学相结合,并以此为应用案例,探讨微视频技术在基础化学实验教学中的应用。微视频技术的应用有助于提升学习过程的趣味性、互动性,规范实验操作,进行探索性学习;同时促进学生之间的交流学习,深刻理解和掌握知识点,提升实验实践教学环节的投入产出效率。
关键词 ：
微视频技术 微视频技术 视频制作 视频制作 基础化学实验 基础化学实验
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| GB/T 7714 | 赵煜娟 , 李钒 , 孙少瑞 et al. 微视频技术在基础化学实验教学中的应用探索 [J]. | 教育教学论坛 , 2020 , (51) : 389-390 . |
| MLA | 赵煜娟 et al. "微视频技术在基础化学实验教学中的应用探索" . | 教育教学论坛 51 (2020) : 389-390 . |
| APA | 赵煜娟 , 李钒 , 孙少瑞 , 陈戈 . 微视频技术在基础化学实验教学中的应用探索 . | 教育教学论坛 , 2020 , (51) , 389-390 . |
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摘要 ：
Based on the non-equilibrium molecular dynamics simulation method (NEMD), the present paper investigated the thermal rectification effect in the solid-liquid interface system. The thermal rectification model is proposed by using the temperature-dependent adsorption effect of the fluid molecules on the solid surface. The influence of the solid-liquid interaction intensity on the thermal rectification is examined by MD simulations. It is found that the heat flux from liquid to solid is higher than that in the opposite direction for weak solid-liquid interaction strength, while the heat flux from solid to liquid can be much larger for strong solid-liquid interaction strength. Therefore, the thermal rectification effect in the solid-liquid interface can be reversed. © 2020, Science Press. All right reserved.
关键词 ：
Liquids Liquids Phase interfaces Phase interfaces Molecular dynamics Molecular dynamics Heat flux Heat flux
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| GB/T 7714 | Li, Hai-Yang , Li, Fan , Wang, Jun et al. Reversed Thermal Rectification Effect in Solid-liquid Interface [J]. | Journal of Engineering Thermophysics , 2020 , 41 (11) : 2813-2817 . |
| MLA | Li, Hai-Yang et al. "Reversed Thermal Rectification Effect in Solid-liquid Interface" . | Journal of Engineering Thermophysics 41 . 11 (2020) : 2813-2817 . |
| APA | Li, Hai-Yang , Li, Fan , Wang, Jun , Xia, Guo-Dong . Reversed Thermal Rectification Effect in Solid-liquid Interface . | Journal of Engineering Thermophysics , 2020 , 41 (11) , 2813-2817 . |
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摘要 ：
The heat transfer through nanoscale confined fluids under transversal temperature gradients are investigated by using nonequilibrium molecular dynamics (NEMD) simulations. Due to the asymmetric adsorption on the heterogeneous structure, the thermal accommodation coefficients and the fluid pressure for the forward and backward directions are found to be different with each other, which in turn results in the thermal rectification effect. By increasing the discrepancy between the left and right solid-fluid interface parameters, the thermal rectification effect can be enhanced. © 2020, Science Press. All right reserved.
关键词 ：
Fluidity Fluidity Kinetic theory of gases Kinetic theory of gases Phase interfaces Phase interfaces Molecular dynamics Molecular dynamics Heat transfer Heat transfer
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| GB/T 7714 | Li, Fan , Li, Hai-Yang , Zhang, Xin-Xin et al. Gas Kinetic Theory Analysis of Thermal Rectification in Solid-fluid Interface [J]. | Journal of Engineering Thermophysics , 2020 , 41 (4) : 1012-1017 . |
| MLA | Li, Fan et al. "Gas Kinetic Theory Analysis of Thermal Rectification in Solid-fluid Interface" . | Journal of Engineering Thermophysics 41 . 4 (2020) : 1012-1017 . |
| APA | Li, Fan , Li, Hai-Yang , Zhang, Xin-Xin , Wang, Jun , Xia, Guo-Dong . Gas Kinetic Theory Analysis of Thermal Rectification in Solid-fluid Interface . | Journal of Engineering Thermophysics , 2020 , 41 (4) , 1012-1017 . |
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