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Machine learning for online control of particle accelerators

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 94-104页

作者： Xiaolong Chen Zhijun Wang Yuan He Hong Zhao Chunguang Su Shuhui Liu Weilong Chen Xiaoying Zhao xin Qi Kunxiang sun Chao Jin Yimeng Chu Hongwei Zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technonlogy guangdong Laboratory Huizhou 516000China Department of Physics Xiamen UniversityXiamen 361005China

Particle accelerators play a critical role in modern scientific ***,existing manual beam control methods heavily rely on experienced operators,leading to significant time consumption and potential challenges in managing next-generation accelerators characterized by higher beam current and stronger nonlinear *** this paper,we establish a dynamical foundation for designing the online adaptive controller of accelerators using machine *** provides a guarantee for dynamic controllability for a class of scientific instruments whose dynamics are described by spatial-temporal equations of motion but only part variables along the instruments under steady states are *** necessity of using historical time series of beam diagnostic data is *** strategies involve also employing a well-established virtual beamline of accelerators,by which various beam calibration scenarios that actual accelerators may encounter are *** the reinforcement learning algorithm is adopted to train the controller with the interaction to the virtual ***,the controller is seamlessly transitioned to real ion accelerators,enabling efficient online adaptive control and ***,the controller demonstrates significant robustness,effectively managing beams with diverse charge mass ratios without requiring *** a controller allows us to achieve the global control within the entire superconducting section of the China Accelerator Facility for Superheavy Elements.

关键词： nonlinear complex system adaptive control machine learning particle accelerator simulation to reality

Loosening metal nodes in metal-organic frameworks to facilitate the regulation of valence

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Fundamental Research 2025年第1期5卷 158-164页

作者： Li, Yu-Xia Shen, Jia-xin Diao, Ze-Jiu Qi, Shi-Chao Liu, Xiao-Qin sun, Lin-Bing State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) College of Chemical Engineering Nanjing Tech University Nanjing 210009 China

The valence of metal nodes in metal-organic frameworks (MOFs) determines their performance in applications while developing an efficient approach for valence regulation is challenging. Here we present a strategy to make the valence regulation much easier by loosening metal nodes by thermal pretreatment. The typical MOF, HKUST-1, with the tunable valence of Cu nodes, was used as a proof of concept. Thermal pretreatment (producing HK-T) changes the chemical environment and loosens Cu nodes, endowing them with enhanced reducibility. In the subsequent vapor-induced reduction, the yield of Cu+ from Cu2+ conversion in HK-T (producing HK-T-V) reaches 69%, which is higher than that in pristine HKUST-1 (producing HK-V) with a Cu+ yield of 19% as well as the reported yields of target-valence metal nodes in various MOFs (6∼30%). The obtained HK-T-V possessing abundant Cu+ sites can capture 0.809 mmol/g thiophene in adsorptive desulfurization, 2.5 times higher than HK-V and superior to most reported adsorbents. © 2022

关键词： Adsorption Copper Desulfurization Metal-organic frameworks Valence regulation

基于LSTM-SSA-BDLM的桥梁结构变形性能动态预测与预警

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同济大学学报(自然科学版) 2025年第1期53卷 26-34页

作者：屈广孙利民辛公锋同济大学土木工程学院上海200092 同济大学土木工程防灾国家重点实验室上海200092 山东省高速公路技术和安全评估重点实验室山东济南250098

掌握桥梁结构预期行为可以提早识别潜在的结构问题或失效模式。提出了一种新型的基于长短期记忆网络(LSTM)的桥梁结构性能动态预测框架。研究采用Block Maxima(BM)方法从每小时监测数据中提取挠度极值,作为评估桥梁安全性能的关键指标... 详细信息

掌握桥梁结构预期行为可以提早识别潜在的结构问题或失效模式。提出了一种新型的基于长短期记忆网络(LSTM)的桥梁结构性能动态预测框架。研究采用Block Maxima(BM)方法从每小时监测数据中提取挠度极值,作为评估桥梁安全性能的关键指标。该方法通过对具有周期性的挠度极值序列进行滑动窗口LSTM预测,结合奇异谱分析(SSA)和考虑误差更新的贝叶斯动态线性模型(BDLM),有效地提取了由环境因素引起的长期趋势和周期性挠度变化。这一过程有效降低了噪声的影响,同时保留了车辆荷载效应的关键信息。在实际工程案例中的三组监测数据应用表明,该方法在预测精度上相较于滑动窗口LSTM和BDLM方法有显著提升。此外,还提出了一种基于极值理论的动态预警阈值设定方法,有效避免了静态预警指标的局限性,并利用预测结果的置信区间实现了提前预警。

关键词：结构性能结构预期行为长短期记忆网络挠度预警

Adult split liver transplantation to treat liver cancer: a single-center retrospective study

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World Journal of Emergency Medicine 2025年第1期16卷 57-62页

作者： Qiang sun Haoze Cao Xuesong Bai xin Han Wanlu You Zhongquan sun Yixin Zhang Xiaochang Wu Feng Fang Fan Wu Lianyue Yang Sheng Yan Yuan Ding Weilin Wang Department of Hepatobiliary Pancreatic Surgery the Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009China Department of Hepatobiliary Surgery Huzhou Central HospitalZhejiang University Huzhou HospitalHuzhou 313002China Department of General Surgery Xiangya HospitalCentral South UniversityChangsha 410008China

BACKGROUND: The increasing morbidity of liver cancer has led to a growing demand for transplantation. Split liver transplantation(SLT) is a promising way to ameliorate organ shortages. However, the safety and efficacy of SLT are still controversial. The aim of this study was to assess the clinical outcome of SLT in liver cancer patients at our center. METHODS: A total of 74 patients who received liver transplantation at a tertiary hospital from March 2019 to July 2023 were retrospectively studied, of whom 37 recipients underwent SLT and 37 recipients underwent whole-graft liver transplantation(WGLT). Clinical data were analyzed and compared between patients who underwent SLT and ***: SLT and WGLT were successfully performed, with no intraoperative transplantrelated mortality. Postoperatively, no significant differences in total bilirubin(TB, P=0.266), alanine transaminase(ALT, P=0.403) and aspartate transaminase(AST, P=0.160) levels within 30 d were detected between the two groups. The transplant-related mortality rates were 8.1% in the SLT group and 5.4% in the WGLT group within 30 d of surgery(P=1.000), and 10.8% and 8.1%, respectively, at 90 d after surgery(P=1.000). There were no significant differences in overall survival(OS) and progress-free survival(PFS) between the SLT and WGLT groups(P=0.910, P=0.190). CONCLUSION: Our results show that SLT does not imply additional risks in treating liver cancer compared with WGLT.

关键词： Adult Split liver transplantation Liver cancer Prognosis Retrospective

A kinetic study and factor analysis of solar thermochemical membrane reactors for syngas production

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Science China(Technological Sciences) 2025年第1期68卷 203-217页

作者： Jiaxin xinG Chao XU Xiangyu sun xin XIA Fei JIN Qiongqiong JIANG Jiale GAO Key Laboratory of Power Station Energy Transfer Conversion and System of MOE School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China Department of Chemistry University College LondonLondon WC1H 0AJUK School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyState Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021China

Solar thermochemical conversion technologies are promising for effectively utilizing solar energy by capturing the full spectrum of solar *** overcome the challenges of low energy conversion efficiency and intermittency faced by solar thermochemical conversion,these technologies can be effectively integrated with membrane reactor *** the performance of solar thermochemical membrane reactors has been experimentally tested,the chemical reactions and oxygen transport mechanisms during the energy conversion process remain poorly *** study introduces a resistance network model to elucidate the interactions between interfacial reactions and bulk diffusion during simultaneous oxidationreduction reactions on both sides of the *** analyzed the oxygen flux of the membrane reactor under various operating conditions using this model to identify the reaction/transport-limiting side of the overall *** most effective solar membrane reactor configuration utilizes natural gas and CO_(2),facilitating clean conversion of fossil fuels with significant advantages in fuel production and energy *** CH_4 lowers the overall reaction temperature,maintains low oxygen partial pressure on the sweep side,and produces a synthesis gas with a 2:1 H_2/CO molar ***,a sensitivity analysis was used to explore the relationship between overall fuel production performance and operational parameters,highlighting the critical role of this research in enhancing the reaction and transport performance of membrane reactors and advancing the development of solar-driven thermochemical fuel production technologies.

关键词： thermochemistry oxygen-permeable membrane membrane reactor chemical kinetics

Spatio-temporal evolution of complex agricultural land use and its drivers in a super-large irrigation district (Hetao) of the upper Yellow River Basin (2000–2021)

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Journal of Geographical Sciences 2025年第2期35卷 273-301页

作者： LI xinyi sun Chen XIAO Xue LI Zhengzhong MA xin WANG Jun XU Xu Chinese-Israeli International Center for Research and Training in Agriculture College of Water Resources &Civil Engineering China Agricultural University Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Shahaoqu Experimental Station Jiefangzha Department Inner Mongolia Hetao Irrigation District Water Resources Development Center Water Resources Research Institute of Inner Mongolia College of Economics & Management China Agricultural University

Accurate spatio-temporal land cover information in agricultural irrigation districts is crucial for effective agricultural management and crop production. Therefore, a spectralphenological-based land cover classification(SPLC) method combined with a fusion model(flexible spatiotemporal data fusion, FSDAF)(abbreviated as SPLC-F) was proposed to map multi-year land cover and crop type(LC-CT) distribution in agricultural irrigated areas with complex landscapes and cropping system, using time series optical images(Landsat and MODIS). The SPLC-F method was well validated and applied in a super-large irrigated area(Hetao) of the upper Yellow River Basin(YRB). Results showed that the SPLC-F method had a satisfactory performance in producing long-term LC-CT maps in Hetao, without the requirement of field sampling. Then, the spatio-temporal variation and the driving factors of the cropping systems were further analyzed with the aid of detailed household surveys and statistics. We clarified that irrigation and salinity conditions were the main factors that had impacts on crop spatial distribution in the upper YRB. Investment costs, market demand, and crop price are the main driving factors in determining the temporal variations in cropping distribution. Overall, this study provided essential multi-year LC-CT maps for sustainable management of agriculture, eco-environments, and food security in the upper YRB.

关键词：

对话与融合:不同视域中的分析哲学——第十四届全国分析哲学学术研讨会综述

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哲学分析 2025年第1期16卷 189-195页

作者：孙新山东大学哲学与社会发展学院

2024年10月19—20日,“第十四届全国分析哲学研讨会”在山东省济南市举行。本次会议由中国现代外国哲学学会分析哲学专业委员会和中国社会科学院哲学研究所《哲学研究》编辑部主办,山东大学哲学与社会发展学院承办,中国人民大学书报资... 详细信息

2024年10月19—20日,“第十四届全国分析哲学研讨会”在山东省济南市举行。本次会议由中国现代外国哲学学会分析哲学专业委员会和中国社会科学院哲学研究所《哲学研究》编辑部主办,山东大学哲学与社会发展学院承办,中国人民大学书报资料中心、上海社会科学院哲学研究所《哲学分析》编辑部、山东大学概念与推理研究所、山东大学中国诠释学研究中心协办。本届会议选取“对话与融合:不同视域中的分析哲学”作为会议主题,体现了分析哲学在当代哲学研究中的动态发展和多元互动,吸引了全国90余所高校及科研院所的260余位专家学者、同学参与。

关键词：中国人民大学多元互动上海社会科学院现代外国哲学《哲学研究》对话与融合哲学研究所哲学分析

Great influence of demagnetization history on internal interaction and magnetization process of mischmetal-based magnets

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 183-192页

作者： Dan Liu Jiefu Xiong Lichen Wang xinqi Zheng xin Ming Jiaying Jin Jiazheng Hao He Bai Zhenxing Li Tongyun Zhao Fengxia Hu Jirong sun Jun Shen Baogen Shen Department of Physics Beijing Technology and Business UniversityBeijing 10048China Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 31521China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Spallation Neutron Source Science Center Dongguan 523803China School of Mechanical Engineering Beijing Institute of Technology Beijing 100081China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China

The magnetization process and corresponding magnetization curve are usually used to analyze the coercivity mechanism of NdFe-B based sintered ***,different demagnetization histories will seriously influence the magnetization curve,leading to an inaccurate understanding and analysis of magnetization *** this work,we investigated the magnetization behavior of multi-main phase(MMP)magnets with thermal demagnetized and alternating current demagnetized *** curves of initial magnetization process and demagnetization process of thermal demagnetized magnets reflect the movement of domain walls inside the grains and the magnetization interaction between the grains,*** is noted that the former process cannot represent the magnetization reversal of the entire magnet,which is not appropriate to analyze coercivity mechanism *** the recoil curves of both two processes of AC demagnetized magnets can illustrate the magnetization reversal of the entire grains and the interaction between ***-optical Kerr microscope shows that the grains of thermal demagnetized magnets are in multi-domain states,and the grains of AC demagnetized magnets are almost in singledomain *** walls of thermal demagnetized magnets move easily within the grains,which is more conducive to magnetization saturation in industrial *** addition,the minorloops of thermal demagnetized magnets can independently represent the transition of grains from multi-domain to single-domain and the demagnetization of single-domain grains,which is equivalent to characterizing the internal interactions by recoil *** investigation of magnetization characteristics of MMP sintered magnets starting from different demagnetized states is helpful to further understand the internal interaction and magnetic hardening mechanism.

关键词： permanent magnet demagnetization history magnetization reversal misch-metal rare earth

头孢哌酮/舒巴坦治疗卒中相关性肺炎的临床观察

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中华医院感染学杂志 2012年第15期22卷 3347-3349页

作者：孙广信赵美英翟建霞郑州市中心医院呼吸内科河南郑州450007 郑州市中心医院神经内科河南郑州450007 郑州市中心医院RICU 河南郑州450007

目的观察头孢哌酮/舒巴坦治疗卒中相关性肺炎的临床疗效及安全性。方法 78例脑卒中相关性肺炎患者随机分为治疗组、对照组,两组患者均给予改善脑循环、营养脑细胞、化痰、扩张气道及营养支持常规治疗,对照组给予头孢他啶,治疗组给予头... 详细信息

目的观察头孢哌酮/舒巴坦治疗卒中相关性肺炎的临床疗效及安全性。方法 78例脑卒中相关性肺炎患者随机分为治疗组、对照组,两组患者均给予改善脑循环、营养脑细胞、化痰、扩张气道及营养支持常规治疗,对照组给予头孢他啶,治疗组给予头孢哌酮/舒巴坦,两组疗程均为7～14d。结果治疗组与对照组比较,头孢哌酮/舒巴坦组炎症指标白细胞计数分别为(7.72±2.68)×109/L、(11.52±2.85)×109/L(t=6.0689),C-反应蛋白分别为(25.49±6.81)、(41.75±7.65)mg/L(t=9.9263),降钙素原分别为(0.56±0.24)、(0.87±0.32)ng/ml(t=4.8562),差异均有统计学意义(P<0.05);治疗组细菌总清除率达90.91%,明显高于对照组的67.74%,治疗组总有效率为90.00%,对照组总有效率71.05%,两组比较,差异有统计学意义(u=-2.1085,P<0.05)。结论头孢哌酮/舒巴坦治疗卒中相关性肺炎疗效确切,安全性高,可以作为临床推荐用药。

关键词：头孢哌酮/舒巴坦卒中相关性肺炎疗效