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Communications in Theoretical Physics 2002年第7期38卷 85-88页

作者： song tong-qiang zhu yue-jin Department of Physics Ningbo University Ningbo 315211 China Department of Physics Ningbo University Ningbo 315211 China

Based on supersymmetric quantum mechanics theory, we introduced a supersymmetric unitary transfor mation to diagonalize the Hamiltonian of non-degenerate two-mode two-photon Jaynes-Cummings models which include any forms of intensity-dependent coupling, field-dependent detuning, and field nonlinearity. Its eigenvalue, eigenstates,and time evolution of state vector are obtained.

关键词： supersymmetric unitary transformation, Jaynes-Cumnings model

Reward Function Design Method for Long Episode Pursuit Tasks Under Polar Coordinate in Multi-Agent Reinforcement Learning

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Journal of Shanghai Jiaotong university(Science) 2024年第4期29卷 646-655页

作者： DONG Yubo CUI Tao ZHOU Yufan song Xun zhu yue DONG Peng School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai200240China Beijing Institute of Electronic System Engineering Beijing100854China

Multi-agent reinforcement learning has recently been applied to solve pursuit ***,it suffers from a large number of time steps per training episode,thus always struggling to converge effectively,resulting in low rewards and an inability for agents to learn *** paper proposes a deep reinforcement learning(DRL)training method that employs an ensemble segmented multi-reward function design approach to address the convergence problem mentioned *** ensemble reward function combines the advantages of two reward functions,which enhances the training effect of agents in long ***,we eliminate the non-monotonic behavior in reward function introduced by the trigonometric functions in the traditional 2D polar coordinates observation *** results demonstrate that this method outperforms the traditional single reward function mechanism in the pursuit scenario by enhancing agents’policy scores of the *** ideas offer a solution to the convergence challenges faced by DRL models in long episode pursuit problems,leading to an improved model training performance.

关键词： multi-agent reinforcement learning deep reinforcement learning(DRL) long episode reward function

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变工况隔膜压缩机曲轴动力学仿真分析

佳木斯大学学报（自然科学版） 2024年第5期42卷 47-50,117页

作者：李强金磊朱峰李跃宋艺伟合肥工业大学机械工程学院安徽合肥230009 安瑞科(蚌埠)压缩机有限公司安徽蚌埠233050 中国科学院合肥物质科学研究院智能机械研究所安徽合肥230031 安徽皖仪科技股份有限公司安徽合肥230088

隔膜压缩机通过活塞运动挤压膜片达到压缩气体的作用,而这一过程中产生的排油压力会导致各传动部件受到复杂的交变载荷,而像曲轴等重要部件上则会产生较大的应力应变,这些复杂的作用力会引发曲轴等部件的强烈振动。针对这一问题,采用理... 详细信息

隔膜压缩机通过活塞运动挤压膜片达到压缩气体的作用,而这一过程中产生的排油压力会导致各传动部件受到复杂的交变载荷,而像曲轴等重要部件上则会产生较大的应力应变,这些复杂的作用力会引发曲轴等部件的强烈振动。针对这一问题,采用理论分析与ADAMS刚柔耦合仿真方法,对一台排气压力为45MPa隔膜压缩机的往复运动机构进行分析,结果表明:在额定工况下,曲柄销径向最大受力约为70282.4N,切向最大受力约为72593.2N,曲轴上最大应力值为141.36MPa,最大变形量为0.108mm;而对不同工况的分析结果显示,排气压力升高、曲轴转速变大都会导致曲轴上的应力增大。其中,转速变大对应力值的影响较小,而排气压力升高则对应力值的影响较大。

关键词：隔膜压缩机运动机构 ADAMS仿真应力应变

土地利用影响下无定河流域浮游植物群落与环境因子响应

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环境科学 2024年第4期45卷 2211-2222页

作者：郭善嵩胡恩丁一桐张嘉渭孙长顺卢悦潘保柱西安理工大学西北旱区生态水利国家重点实验室西安710048 陕西省环境科学研究院西安710061 西交利物浦大学理学院苏州215123

为探究不同土地利用类型影响下,无定河流域浮游植物群落特征变化及主要环境影响因子,于2021年春季(4~5月)和秋季(9~10月)对无定河干支流及典型淤地坝水体进行系统的水生态调查.共鉴定浮游植物273种,隶属于7门90属,春季(241种)高于秋季(... 详细信息

为探究不同土地利用类型影响下,无定河流域浮游植物群落特征变化及主要环境影响因子,于2021年春季(4~5月)和秋季(9~10月)对无定河干支流及典型淤地坝水体进行系统的水生态调查.共鉴定浮游植物273种,隶属于7门90属,春季(241种)高于秋季(189种),春和秋两季浮游植物密度、生物量均值分别为479.95×10^(4) cells·L^(-1)、6.41 mg·L^(-1)和171.29×10^(4)cells·L^(-1)、2.64 mg·L^(-1).流域优势种以硅藻门的梅尼小环藻(Cyclotella meneghiniana)、尖针杆藻(Synedra acus)、简单舟形藻(Navicula simples)和谷皮菱形藻(Nitzschia palea)为主,裸藻(Euglena spp.)为淤地坝水体特有优势种.Shannon-Wiener多样性指数和Margalef丰富度指数显示春季高于秋季,Pielou均匀度指数变化相对较小.采样点1000 m河岸带缓冲区土地利用类型以耕地和草地为主.环境因子中水温(WT)、浊度(Turb)、p H、溶解氧(DO)、总氮(TN)和总磷(TP)浓度时空变化显著.结构方程模型(SEM)表明:不同土地利用类型通过影响环境因子而间接影响浮游植物群落特征,春季影响浮游植物群落特征的主要环境因子是水温、流速、p H、溶解氧和氨氮(NH_(4)~+-N),而在秋季是浊度、水温和溶解氧.

关键词：无定河流域浮游植物土地利用环境因子结构方程模型(SEM)

Epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China:a hospital-based retrospective study

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Neural Regeneration Research 2024年第5期19卷 1126-1132页

作者： Hengxing Zhou Yongfu Lou Lingxiao Chen Yi Kang Lu Liu Zhiwei Cai David BAnderson Wei Wang Chi Zhang jinghua Wang Guangzhi Ning Yanzheng Gao Baorong He Wenyuan Ding Yisheng Wang Wei Mei yueming song yue Zhou Maosheng Xia Huan Wang Jie Zhao Guoyong Yin Tao Zhang Feng jing Rusen zhu Bin Meng Li Duan Zhongmin Zhang Desheng Wu Zhengdong Cai Lin Huang Zhanhai Yin Kainan Li Shibao Lu Shiqing Feng Department of Orthopedics The Second HospitalCheeloo College of MedicineShandong UniversityShandongChina Department of Orthopedics Shandong University Center for OrthopedicsQilu HospitalCheeloo College of MedicineShandong UniversityShandongChina Department of Orthopedics Tianjin Medical University General HospitalInternational Science and Technology Cooperation Base of Spinal Cord InjuryTianjin Key Laboratory of Spine and Spinal CordTianjinChina Faculty of Medicine and Health The Back Pain Research TeamSydney Musculoskeletal HealthThe Kolling InstituteUniversity of SydneySydneyNSWAustralia Department of Spine Surgery Honghui HospitalXi’an Jiaotong UniversityXi’anShaanxi ProvinceChina Department of Burns and Plastic Surgery The Fourth Medical Center of Chinese PLA General HospitalBeijingChina Faculty of Medicine and Health School of Health SciencesUniversity of SydneyNSWAustralia Sydney Spine Institute BurwoodSydneyNSWAustralia Laboratory of Epidemiology Tianjin Neurological InstituteDepartment of NeurologyTianjin Medical University General Hospital&Tianjin Neurological InstituteKey Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous SystemMinistry of Education and Tianjin CityTianjinChina Department of Orthopedics Henan Provincial People’s HospitalZhengzhouHenan ProvinceChina Department of Spinal Surgery The Third Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Department of Orthopedics The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Department of Spine Surgery Zhengzhou Orthopedics HospitalZhengzhouHenan ProvinceChina Department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan UniversityChengduSichuan ProvinceChina Department of Orthopedics Xinqiao HospitalArmy Medical UniversityChongqingChina Department of Orthopedics The First Affiliated Hospital of China Medical UniversityShenyangLiaoning ProvinceChina Department of Spinal Surgery Shengj

Traumatic spinal cord injury is potentially catastrophic and can lead to permanent disability or even *** has the largest population of patients with traumatic spinal cord *** studies of traumatic spinal cord injury in China have mostly been regional in scope;national-level studies have been *** the best of our knowledge,no national-level study of treatment status and economic burden has been *** retrospective study aimed to examine the epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China at the national *** included 13,465 traumatic spinal cord injury patients who were injured between January 2013 and December 2018 and treated in 30 hospitals in 11 provinces/municipalities representing all geographical divisions of *** epidemiological and clinical features,treatment status,and total and daily costs were *** in the percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department and cost of care were assessed by annual percentage change using the Joinpoint Regression *** percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department did not significantly change overall(annual percentage change,-0.5%and 2.1%,respectively).A total of 10,053(74.7%)patients underwent *** 2.8%of patients who underwent surgery did so within 24 hours of injury.A total of 2005(14.9%)patients were treated with high-dose(≥500 mg)methylprednisolone sodium succinate/methylprednisolone(MPSS/MP);615(4.6%)received it within 8 *** total cost for acute traumatic spinal cord injury decreased over the study period(-4.7%),while daily cost did not significantly change(1.0%increase).Our findings indicate that public health initiatives should aim at improving hospitals’ability to complete early surgery within 24 ho

关键词： China clinical features costs epidemiology methylprednisolone sodium succinate methylprednisolone retrospective study traumatic spinal cord injury treatment

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang Yong-Hao Chen jing-Yu Tang Rui-Rui Fan qiang Li Gong Li Dong Liu Zheng-Yao jin Xing-zhu Cui Tian-Xiang Chen Yi-Wei Yang Rong Liu Han Yi Yang Li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao Min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-zhu He Yong-Cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Wei-Hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang Ling Kang Bo Li Chao Li Jia-Wen Li Xiao Li Jie Liu Shu-Bin Liu Guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui song Kang Sun Zhi-Xin Tan Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu Li-Kun Xie Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang yue Zhang Zhi-Yong Zhang Mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

Understanding Mass Dependence of Glass Formation in Ring Polymers

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Chinese Journal of Polymer Science 2023年第9期41卷 1447-1461,I0008页

作者： Xiang-Yu song Zhen-yue Yang Qi-Lu Yuan Shang-Wei Li Zi-qiang Tang yue-tong Dong Shi-Chun Jiang Wen-Sheng Xu State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China School of Materials Science and Engineering Tianjin UniversityTianjin300072China

Having highly tunable molecular topology is one of the most important characteristics of polymers that provides these materials with a wide range of interesting and unique *** particular,ring polymers exhibit a number of properties that are markedly distinct from their linear ***,we compare and contrast the glass formation of unknotted,nonconcatenated ring and linear polymer melts having variable molecular mass based on molecular dynamics simulations of a coarse-grained *** revealing an unusual property in the structure of small rings,we discuss the mass dependence of the structural relaxation time determined from the self-intermediate scattering function over a wide range of temperatures in both ring and linear *** a general trend,we find that the characteristic temperatures(e.g.,the glass transition temperature)and fragility of glass formation increase with increasing molecular mass in linear polymers,but the mass dependences of these properties are rather weak in the family of ring polymer models considered,in broad accord with experimental ***,we show that the glass formation of ring polymers can quantitatively be described by the string model,a model that is broadly consistent with the entropy theory of glass formation and that takes the mass of string-like clusters as a molecular realization of the abstract cooperatively rearranging *** opens the possibility of applying the configurational entropy-based theories to describe the glass formation of ring polymers,once the ring topology is taken into account.

关键词： Ring polymers Glass formation String model Molecular dynamics simulation

松嫩盐碱退化草地土壤理化性质及离子变化规律分析

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草地学报 2024年第6期32卷 1702-1709页

作者：韦银珠李家红孙雪铜刘杰淋肖汇川李浩天付楚涵宋雪张强秦立刚东北农业大学动物科学技术学院黑龙江哈尔滨150030 黑龙江省农业科学院草业研究所黑龙江哈尔滨150000

为了解不同盐碱退化状态下土壤理化性质和土壤离子的变化,本研究以松嫩温性草甸草地为研究对象,比较了未退化、轻度、中度和重度盐碱退化草地下土壤离子和土壤理化性质,分析盐碱退化过程中土壤理化性质、离子变化规律及其相互关系。结... 详细信息

为了解不同盐碱退化状态下土壤理化性质和土壤离子的变化,本研究以松嫩温性草甸草地为研究对象,比较了未退化、轻度、中度和重度盐碱退化草地下土壤离子和土壤理化性质,分析盐碱退化过程中土壤理化性质、离子变化规律及其相互关系。结果表明:土壤K^(+)、Na^(+)、Mg^(2^+)、Ca ^(2+)、Cl^(-)、HCO_(3)^(-)、SO_(4)^(2-)、CO_(3)^( 2-)随盐碱程度加重显著增加,阳离子交换量显著下降(P<0.05)。随着盐碱程度变化,土壤电导率、pH、全钾显著增加,土壤全氮、碱解氮显著下降(P<0.05)。与未退化土壤相比,轻度和中度盐碱草地土壤含水量显著上升(P<0.05),速效磷含量显著降低(P<0.05);重度退化盐碱草地速效磷含量显著上升(P<0.05)。土壤TN、AN、AP、K^(+)与盐碱化程度之间存在显著的相关性。未退化草地土壤AN、TN含量较高,而重度退化草地AP、K^(+)含量较高。本研究为松嫩盐碱退化草地修复措施的合理选择提供依据。

关键词：松嫩草地盐碱化土壤理化性质土壤离子

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Cationic and Anionic Antimicrobial Agents Co‑Templated Mesostructured Silica Nanocomposites with a Spiky Nanotopology and Enhanced Biofilm Inhibition Performance

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Nano-Micro Letters 2022年第5期14卷 181-191页

作者： Yaping song qiang Sun Jiangqi Luo yueqi Kong Bolin Pan jing Zhao yue Wang Chengzhong Yu Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQLD 4072Australia Centre for Microscopy and Microanalysis University of QueenslandBrisbaneQLD 4072Australia Australia Centre for Water and Environmental Biotechnology University of QueenslandBrisbaneQLD 4072Australia School of Chemistry and Molecular Engineering East China Normal UniversityShanghai 200241People’s Republic of China

Silica-based materials are usually used as delivery systems for antibacterial *** rare cases,bactericidal cationic surfactant templated silica composites have been reported as antimicrobial ***,their antibacterial efficacy is limited due to limited control in content and ***,we report a“dual active templating”strategy in the design of nanostructured silica composites with intrinsic antibacterial *** strategy uses cationic and anionic structural directing agents as dual templates,both with active antibacterial *** cationic-anionic dual active templating strategy further contributes to antibacterial nanocomposites with a spiky *** controllable release of dual active antibacterial agents,the spiky nanocomposite displays enhanced anti-microbial and anti-biofilm properties toward Staphylococcus *** findings pave a new avenue toward the designed synthesis of novel antibacterial nanocomposites with improved performance for diverse antibacterial applications.

关键词： Antibacterial surfactants Spiky nanoparticles Antibacterial Anti-biofilm Mesostructured nanocomposites

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大豆GmHSF21基因的生物信息学分析

大豆科技 2024年第1期 13-20,58页

作者：宋勇泽刘汝翠朱永胜李月姜妍佟晓红王绍东王遂东北农业大学农学院哈尔滨150030 克东禹王大豆蛋白食品有限公司黑龙江克东164800 黑龙江九阳豆业有限公司黑龙江大庆166200 杭州九阳豆业有限公司杭州310018

植物热激转录因子(Heat shock transcription factor,HSFs)在参与高温、干旱及盐碱等逆境胁迫方面发挥重要作用。为探究大豆GmHSF21基因在盐胁迫应答中的作用,文章以大豆品种中黄13前期盐胁迫处理下的转录组差异基因数据为研究对象,对大... 详细信息

植物热激转录因子(Heat shock transcription factor,HSFs)在参与高温、干旱及盐碱等逆境胁迫方面发挥重要作用。为探究大豆GmHSF21基因在盐胁迫应答中的作用,文章以大豆品种中黄13前期盐胁迫处理下的转录组差异基因数据为研究对象,对大豆HSF基因家族中的候选基因GmHSF21进行生物信息学分析。结果表明,GmHSF21属大豆HSF基因家族中的A亚族,共编码341个氨基酸,其编码区存在4处多态性位点,具有保守的HSF和HSF DNA-binding基序。系统发育分析表明,AT3G22830与GmHSF21亲缘关系近。顺式作用原件分析表明该基因启动子区具有响应多种生物及非生物胁迫的作用元件。荧光定量PCR结果显示该基因在盐胁迫条件下表达量上调,与转录组结果基本一致。

关键词：大豆 HSF家族盐胁迫生物信息学分析