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Quantum control based on three forms of Lyapunov functions

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Chinese Physics B 2024年第4期33卷 216-222页

作者：俞国慧杨洪礼 College of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590China

This paper introduces the quantum control of Lyapunov functions based on the state distance, the mean of imaginary quantities and state *** this paper, the specific control laws under the three forms are *** is analyzed by the La Salle invariance principle and the numerical simulation is carried out in a 2D test *** calculation process for the Lyapunov function is based on a combination of the average of virtual mechanical quantities, the particle swarm algorithm and a simulated annealing ***, a unified form of the control laws under the three forms is given.

关键词： quantum system Lyapunov function particle swarm optimization simulated annealing algorithms quantum control

Ground state of Rydberg-dressed Bose gas confined in a toroidal trap

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Communications in Theoretical Physics 2024年第1期76卷 29-35页

作者： lin-Xue Wang hong-li yang Hui liu Si-lin Chen Ya-Jun Wang Xiao-Fei Zhang Department of Physics School of Physics and Information ScienceShaanxi University of Science and TechnologyXi'an 710021China Department of Basic Sciences Air Force Engineering UniversityXi'an 710051China

The experimental realization of Rydberg dressing technology in ultracold atomic systems provides another superior platform for studying novel states of matter and macroscopic quantum *** this work,based on the mean-field theory,we have investigated the ground-state phases of a two-component Bose–Einstein condensate with Rydberg interaction and confined in a toroidal *** effects of the Rydberg interaction and external potential,especially the Rydberg blockade radius,on the ground-state structure of such a system have been investigated in full parameter *** results show that the Rydberg blockade radius,which can be regarded as another controllable parameter,can be used to obtain a variety of ground-state *** interestingly,it is found that for weak Rydberg interactions,the Rydberg blockade radius breaks the spontaneous rotational symmetry of the system,leading to the formation of a discrete unit cell *** strongly interacting cases,it can be used to realize different orders of discrete rotational symmetry breaking.

关键词： Bose-Einstein condensate Rydberg dressing toroidal trap

Advances in the function of traditional medicine for vitiligo treatment

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Traditional Medicine Research 2024年第3期9卷 43-51页

作者： Jun liu Jia-Yi li Jing-Jing Xu ling-Jun li Wang Cheng Sheng-Tao Yuan Wei Zhang hong-yang li Institute of Dermatology Chinese Academy of Medical Sciences and Peking Union Medical CollegeNanjing 210042China Jiangsu Center for Pharmacodynamics Research and Evaluation China Pharmaceutical UniversityNanjing 210009China School of Basic Medicine and Clinical Pharmacy China Pharmaceutical UniversityNanjing 210042China Department of Dermatology Zhongda Hospital Southeast UniversityNanjing 210009China

Vitiligo has a significant impact on a substantial number of individuals *** Chinese medicine has a long history of serving as a therapeutic treatment for ***,given the increasing volume of research on the utilization of traditional Chinese medicine for vitiligo treatment,it is imperative to conduct a comprehensive review that elucidates the efficacy of Chinese traditional medicine and other active ingredients in the treatment of *** paper presents a comprehensive overview of the clinical preparations used to treat vitiligo,while also highlighting the potential monomers and extracts derived from traditional Chinese medicine for vitiligo treatment.A thorough analysis of the pharmacological effects of traditional Chinese medicine on vitiligo treatment will provide valuable insights and reliable information for the development of new treatment strategies.

关键词： vitiligo traditional Chinese medicine melanogenesis

基于极限梯度提升的完美匹配单层智能算法实现航空瞬变电磁问题高效吸收

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物理学报 2024年第6期73卷 241-249页

作者：冯乃星王欢朱子贤董纯志李宏杨张玉贤杨利霞黄志祥安徽大学电子信息工程学院合肥230601 安徽大学智能计算与信号处理教育部重点实验室合肥230601

对于航空瞬变电磁的低频探地问题,除了精度和效率需要考虑,深地探测问题的复杂度也不容忽视,特别是对于低频复杂问题存在异常体与背景间的多尺度效应.为了模拟开域问题,有限厚度区域的完全匹配层被用于截断计算域,然而这也无形中增大了... 详细信息

对于航空瞬变电磁的低频探地问题,除了精度和效率需要考虑,深地探测问题的复杂度也不容忽视,特别是对于低频复杂问题存在异常体与背景间的多尺度效应.为了模拟开域问题,有限厚度区域的完全匹配层被用于截断计算域,然而这也无形中增大了整个模型,造成计算复杂度增加.鉴于此,提出了一种新的基于极限梯度提升(extreme gradient boosting,XGB)的完美匹配单层模型,并将该模型集成到时域有限差分求解器中,以进一步提高时域有限差分仿真的性能.所提出的基于XGB的完美匹配单层模型通过特征注意力集成学习方法可以获得更高的精度,同时占用更少的内存、消耗更少的时间.此外,由于该模型依托于传统机器学习模型,因此它在模型训练的稳定性和轻量级方面具有显著的优势.最后,通过对航空瞬变电磁应用进行三维数值模拟,验证了该方法的有效性和稳定性.该模型不仅在精度、效率和问题复杂性方面具有优势,而且还可以成功地集成到时域有限差分求解器中,解决低频航空瞬变电磁问题.

关键词：极限梯度提升完美匹配单层机器学习时域有限差分

ABS树脂絮凝过程中抗氧剂添加工艺和絮凝液组成对其性能影响

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塑料科技 2024年第1期52卷 89-92页

作者：杨浩淼李红阳孙磊张明耀刘伯军长春工业大学化学工程学院吉林长春130012 中国石油吉林石化公司质量检验中心吉林吉林132021 中国石油吉林石化公司合成树脂厂吉林吉林132021

水性抗氧剂是丙烯腈-丁二烯-苯乙烯(ABS)树脂生产工艺中絮凝段必须添加的助剂,起到提高ABS树脂热氧老化性的作用,水性抗氧剂的加入工艺和絮凝工艺均对ABS树脂的性能有重要影响。文章采用乳液接枝聚合技术制备了核壳比60∶40的ABS接枝共... 详细信息

水性抗氧剂是丙烯腈-丁二烯-苯乙烯(ABS)树脂生产工艺中絮凝段必须添加的助剂,起到提高ABS树脂热氧老化性的作用,水性抗氧剂的加入工艺和絮凝工艺均对ABS树脂的性能有重要影响。文章采用乳液接枝聚合技术制备了核壳比60∶40的ABS接枝共聚物胶乳,研究了水性抗氧剂加入温度、絮凝剂成分对ABS接枝共聚物热氧老化性能的影响,采用熔融共混技术制备ABS树脂,探究水性抗氧剂加入温度和絮凝剂组成对ABS树脂力学性能、表观性能的影响。结果表明:水性抗氧剂的加入温度高于60℃时,ABS接枝共聚物的热氧老化性能较好。硫酸配置的絮凝液制备的ABS接枝共聚物氧化诱导期大于硫酸镁絮凝液制备的ABS接枝共聚物。抗氧剂加入温度和絮凝液组成对ABS树脂的力学性能无影响,对其表观性能如白度、黄色指数影响明显。

关键词：丙烯腈-丁二烯-苯乙烯树脂絮凝工艺抗氧剂氧化诱导时间

Interplay between magnetic gap and quasi-particle lifetime in topological insulator ferromagnet/f-wave superconductor junctions

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Communications in Theoretical Physics 2024年第7期76卷 158-166页

作者： hong li Xinjian yang College of Science China University of Petroleum

Using the modified Blonder–Tinkham–Klapwijk（BTK） theory, the interplay between the lifetime of quasi particles and the magnetic gap in a topological insulator-based ferromagnet/f-wave superconductor（TI-based FM/f–wave SC） tunnel structure is theoretically studied. Two symmetries of f1and f2waves are considered for superconducting pairing states. The results indicate that reducing the finite quasi-particle lifetime will induce a transformation of energy-gap peaks into a zero-bias peak in tunneling conductance spectrum, as well as a transformation of energy-gap dips into a zero-bias dip in shot noise spectrum, ultimately resulting in the smoothing of the zero-bias conductance peak and the zero-bias shot noise dip. An increase in magnetic gap will suppress the tunnel conductance and shot noise when the conventional Andreev retro-reflection dominates, but will enhance them when the specular Andreev reflection is *** specular Andreev reflection and conventional Andreev retro-reflection will be enhanced as the quasi-particle lifetime increases. When Fermi energy equals the magnetic gap, shot noise and tunneling conductance vanish across all energy ranges. These findings not only contribute to a better understanding of specular Andreev reflection in the FM/f–wave SC junction based on TIs but also provide insights for experimentally determining the f-wave pairing symmetry.

关键词： Andreev retro-reflection finite-quasi-particles lifetime magnetic gap specular Andreev reflection TI-based FM/f-wave SC junction

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闭鞘姜组培快繁技术研究

南方园艺 2024年第3期35卷 31-34页

作者：武宇麟杨威龙陈梅烹李宏杨海南大学南繁学院(三亚南繁研究院) 海南三亚572025

为了解决闭鞘姜种苗繁殖效率低的问题,研究组培快繁无性繁殖技术。以闭鞘姜茎段为外植体,经初代培养、继代培养和生根培养发育成无菌试管苗。结果表明:1/2MS+0.5~1.0 mg/L 6-BA培养基诱导出芽效果较好,出芽率达到81.11%;MS+0.5 mg/L NAA... 详细信息

为了解决闭鞘姜种苗繁殖效率低的问题,研究组培快繁无性繁殖技术。以闭鞘姜茎段为外植体,经初代培养、继代培养和生根培养发育成无菌试管苗。结果表明:1/2MS+0.5~1.0 mg/L 6-BA培养基诱导出芽效果较好,出芽率达到81.11%;MS+0.5 mg/L NAA+2.0~3.0 mg/L 6-BA培养基增殖效果较好,增殖率达到3.67倍;MS+0.2 mg/L 6-BA和2~4mg/L NAA培养基壮苗生根效果较好,苗长达到8.07 cm,根数达到6.35条。该技术体系为闭鞘姜种苗快繁提供了新的技术途径。

关键词：闭鞘姜组培快繁无性繁殖

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Video caching and scheduling with edge cooperation

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Digital Communications and Networks 2024年第2期10卷 450-460页

作者： Zhidu li Fuxiang li Tong Tang hong Zhang Jin yang School of Communication and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China Advanced Network and Intelligent Connection Technology Key Laboratory of Chongqing Education Commission of China Chongqing400065China Key Laboratory of Ubiquitous Sensing and Networking in Chongqing Chongqing400065China

In this paper,we explore a distributed collaborative caching and computing model to support the distribution of adaptive bit rate video *** aim is to reduce the average initial buffer delay and improve the quality of user *** the difference between global and local video popularities and the time-varying characteristics of video popularity,a two-stage caching scheme is proposed to push popular videos closer to users and minimize the average initial buffer *** on both long-term content popularity and short-term content popularity,the proposed caching solution is decouple into the proactive cache stage and the cache update *** the proactive cache stage,we develop a proactive cache placement algorithm that can be executed in an off-peak *** the cache update stage,we propose a reactive cache update algorithm to update the existing cache policy to minimize the buffer *** results verify that the proposed caching algorithms can reduce the initial buffer delay efficiently.

关键词： Video service Distributed and collaborative caching Long-term popularity Short-term popularity

Hot metal quality monitoring system based on big data and machine learning

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Journal of Iron and Steel Research(International) 2023年第5期30卷 915-925页

作者： Ran liu Zhi-feng Zhang Xin li Xiao-jie liu hong-yang li Xiang-ping Bu Jun Zhao Qing Lyu College of Metallurgy&Energy North China University of Science and TechnologyTangshan 063009HebeiChina Hangzhou Pailie Technology Co. Ltd.Hangzhou 310000ZhejiangChina Hebei Iron and Steel Group Tangshan Iron and Steel Co.Ltd.Tangshan 063009HebeiChina

The system of hot metal quality monitoring was established based on big data and machine learning using the real-time production data of a steel enterprise in China.A working method that combines big data technology with process theory was proposed for the characteristics of blast furnace production *** the data have been comprehensively processed,the independent variables that affect the target parameters are selected by using the method of multivariate feature *** use of this method not only ensures the interpretability of the input variables,but also improves the accuracy of the machine learning process and is more easily accepted by *** timely guidance on production,specific evaluation rules are established for the key quality that affects the quality of hot metal on the basis of completed predictions work and uses computer technology to build a quality monitoring system for hot *** online results show that the hot metal quality monitoring system established by relying on big data and machine learning operates stably on site,and has good guiding significance for production.

关键词： Hot metal Big data Machine learning Quality monitoring Feature engineering