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Investigations of inelastic cross sections of H_(2)O molecule by He^(2+) and C^(6+) projectiles with energy range around the Bragg peak

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Nuclear Science and Techniques 2025年第2期36卷 141-154页

作者： Guo-Zhuang Li Cheng-Ye Sun Rui Cheng yan-Shi Zhang Liang-Wen Chen Sheng Zhang Xin-xia Li Lei yang School of Nuclear Science and Technology University of South ChinaHengyang 421001China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Interdisciplinary Center for Fundamental and Frontier Sciences Nanjing University of Science and TechnologyJiangyin 214443China Center for Basic Teaching and Experiment Nanjing University of Science and TechnologyJiangyin 214443China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

Inelastic collisions are the dominant cause of energy loss in *** the energy range around the Bragg peak,single ionization(SI)and single-electron capture(SC)are the primary inelastic collisions that lead to energy *** study employs the classical trajectory Monte Carlo method to study the SI and SC processes of H_(2)O molecules using He^(2+) and C^(6+) projectiles in the energy range of 10 keV/u to 10 MeV/*** total cross sections,single differential cross sections,impact parameter dependence of SI and SC,and fragmentation cross sections were *** illustrate that the cross section for SI is the highest when the projectile energy is close to the Bragg peak *** the projectile energy is below the Bragg peak energy,the ionized electrons in the forward direction dominate,and the removal of electrons can be associated with large impact *** the projectile energy increases,the emission angle of the electrons gradually transitions from small angles(60°~120°)to large angles(60°~120°),and the removal of electrons is associated with small impact *** energy distributions of the ionized electron are similar when the projectile energy is equal to,below or above the Bragg peak *** fragmentation cross sections after SI and SC in the energy range around the Bragg peak were also estimated.

关键词： Classical trajectory Monte Carlo Heavy ion-water molecule collision Inelastic cross sections

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Chondroitinase ABC combined with Schwann cell transplantation enhances restoration of neural connection and functional recovery following acute and chronic spinal cord injury

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Neural Regeneration Research 2025年第5期20卷 1467-1482页

作者： Wenrui Qu xiangbing Wu Wei Wu Ying Wang yan Sun Lingxiao Deng Melissa Walker Chen Chen Heqiao Dai Qi Han Ying Ding Yongzhi xia George Smith Rui Li Nai-Kui Liu xiao-Ming Xu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteDepartment of Neurological SurgeryIndiana University School of MedicineIndianapolisINUSA Department of Hand Surgery the Second Hospital of Jilin UniversityChangchunJilin ProvinceChina Shriners Hospitals Pediatric Research Center Temple University School of MedicinePhiladelphiaPAUSA Department of Anatomy&Cell Biology Indiana University School of MedicineIndianapolisINUSA

Schwann cell transplantation is considered one of the most promising cell-based therapy to repair injured spinal cord due to its unique growth-promoting and myelin-forming properties.A the Food and Drug Administration-approved Phase I clinical trial has been conducted to evaluate the safety of transplanted human autologous Schwann cells to treat patients with spinal cord injury.A major challenge for Schwann cell transplantation is that grafted Schwann cells are confined within the lesion cavity,and they do not migrate into the host environment due to the inhibitory barrier formed by injury-induced glial scar,thus limiting axonal reentry into the host spinal *** we introduce a combinatorial strategy by suppressing the inhibitory extracellular environment with injection of lentivirus-mediated transfection of chondroitinase ABC gene at the rostral and caudal borders of the lesion site and simultaneously leveraging the repair capacity of transplanted Schwann cells in adult rats following a mid-thoracic contusive spinal cord *** report that when the glial scar was degraded by chondroitinase ABC at the rostral and caudal lesion borders,Schwann cells migrated for considerable distances in both rostral and caudal *** Schwann cell migration led to enhanced axonal regrowth,including the serotonergic and dopaminergic axons originating from supraspinal regions,and promoted recovery of locomotor and urinary bladder ***,the Schwann cell survival and axonal regrowth persisted up to 6 months after the injury,even when treatment was delayed for 3 months to mimic chronic spinal cord *** findings collectively show promising evidence for a combinatorial strategy with chondroitinase ABC and Schwann cells in promoting remodeling and recovery of function following spinal cord injury.

关键词： axonal regrowth bladder function chondroitinase ABC functional recovery glial scar lentivirus migration Schwann cell spinal cord injury transplantation

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Precision storage lifetime measurements of highly charged heavy ions in the CSRe storage ring using a Schottky resonator

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Nuclear Science and Techniques 2025年第1期36卷 150-160页

作者： Qian Wang Xin-Liang yan Guang-Yu Zhu Shahab Sanjari Li-Jun Mao He Zhao Yuri ALitvinov Rui-Jiu Chen Meng Wang Yu-Hu Zhang You-Jin Yuan Jun-xia Wu Hong-yang Jiao Yue Yu Zu-Yi Chen Yin-Fang Luo Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China GSI Helmholtzzentrum für Schwerionenforschung Planckstrasse 164291 DarmstadtGermany FH Aachen University of Applied Sciences Heinrich-Mussmann-Str.152428 JülichGermany

Schottky mass spectrometry utilizing heavy-ion storage rings is a powerful technique for the precise mass and decay half-life measurements of highly charged *** to the nondestructive ion detection features of Schottky noise detectors,the number of stored ions in the ring is determined by the peak area in the measured revolution frequency *** of their intrinsic amplitude-frequency characteristic(AFC),Schottky detector systems exhibit varying sensitivities at different *** low-energy electron-cooled stored ions,a new method is developed to calibrate the AFC curve of the Schottky detector system of the Experimental Cooler Storage Ring(CSRe)storage ring located in Lanzhou,*** the amplitude-calibrated frequency spectrum,a notable refinement was observed in the precision of both the peak position and peak *** a result,the storage lifetimes of the electron-cooled fully ionized^(56)Fe^(26+)ions were determined with high precision at beam energies of 13.7 and 116.4 MeV/u,despite of frequency drifts during the *** electron cooling was turned off,the effective vacuum condition experienced by the 116.4 MeV/u^(56)Fe^(26+)ions was determined using amplitude-calibrated spectra,revealing a value of 2×10^(−10)mbar,which is consistent with vacuum gauge readings along the CSRe *** method reported herein will be adapted for the next-generation storage ring of the HIAF facility under construction in Huizhou,*** can also be adapted to other storage ring facilities worldwide to improve precision and enhance lifetime measurements using many ions in the ring.

关键词： Lifetime measurement Schottky mass spectrometry Sensitivity response Highly charged heavy ion Resonator UH vacuum Nondestructive diagnostics

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An Off-Resonant Quantum Collision Model:Realizing a Qubit Coupled with an Effective Negative-Temperature Bath

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Chinese Physics Letters 2025年第1期42卷 15-22页

作者： Wei-Bin yan Zhong-xiao Man Ying-Jie Zhang Yun-Jie xia College of Physics and Engineering Qufu Normal UniversityQufu 273165China

The quantum collision model provides a promising tool for investigating system-bath *** studies of quantum collision models,however,are in the resonant *** quantum dynamics,the off-resonant interactions often result in exciting ***,it is important to investigate the quantum collision models in the off-resonant regime.A bath with a negative absolute temperature is expected to be instrumental in the development of thermal *** design of an effective bath with negative absolute temperature coupled to a qubit is a significant component for developing such thermal *** this study,we establish an effective negative-absolute-temperature bath coupled to a qubit with a quantum collision model in the far-off-resonant *** conduct a detailed systematic investigation of the off-resonant collision model and determine the presence of an additional constraint on the collision duration resulting from the far-off resonant *** dynamics of the collision model in the far-off-resonant regime are different from those beyond the far-off-resonant *** simulations are used to confirm the validity of the proposed approach.

关键词： dynamics. resonant collision

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Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu Liang Ni-Hui Zhang Zhi-Lai Zhan Guang-Lu Chang yan Gao xia Li Wen-Yuan Gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

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高准确度电流比较仪研制及校验方法研究

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计量学报 2025年第1期46卷 112-118页

作者：王维刘夏黄璐杨雁中国计量科学研究院北京100029 国家市场监督管理总局重点实验室(电学量子基准) 北京100029

介绍一种新型高准确度电流比较仪的结构及工作原理,提出了“屏蔽定向引流”线路结构。该结构可基本消除二次绕组容性泄漏误差,并可消除二次绕组各段组合使用时引入的附加误差,提高了电流比较仪的准确度。在电流比率5 A/5 A~5000 A/5 A... 详细信息

介绍一种新型高准确度电流比较仪的结构及工作原理,提出了“屏蔽定向引流”线路结构。该结构可基本消除二次绕组容性泄漏误差,并可消除二次绕组各段组合使用时引入的附加误差,提高了电流比较仪的准确度。在电流比率5 A/5 A~5000 A/5 A范围内,达到的技术指标优于1×10-6。结合“屏蔽定向引流”线路结构的特点,进一步提出了多比率电流比较仪自校准方法,其校准不确定度优于2×10^(-7)。该校准方法准确度高,稳定性好,操作简单,耗时短,可有效解决过去长期困扰的互感器长途运输送检问题。

关键词：电学计量电流比例电流比较仪屏蔽定向引流自校准方法

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独立学院转设对生源质量的影响研究--基于大学声誉与多期DID的实证分析

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重庆高教研究 2025年第1期13卷 82-93页

作者：王新萍夏焰安徽大学高等教育研究所合肥230039

大学声誉是高等学校在长期办学中给社会公众留下的综合印象,良好的大学声誉能够吸引更多优质生源。多年来,推进独立学院转设的工作进展并不顺利,学界对独立学院在与母体大学脱钩后导致的声誉损失,尤其转设是否会影响生源质量方面尚未有... 详细信息

大学声誉是高等学校在长期办学中给社会公众留下的综合印象,良好的大学声誉能够吸引更多优质生源。多年来,推进独立学院转设的工作进展并不顺利,学界对独立学院在与母体大学脱钩后导致的声誉损失,尤其转设是否会影响生源质量方面尚未有一致意见。基于此,借助独立学院转设这一“准自然实验”,以2009—2018年306所独立学院高考录取平均分的面板数据为基础,采用多期双重差分法,实证分析独立学院转设对生源质量的影响。研究发现:独立学院转设后录取平均分数显著降低,转设与录取平均分数的降低存在因果关系。机制分析表明,转设学校失去母体大学的“名校光环”,声誉受到损失进而导致生源质量下降。异质性分析表明,转设对文科录取平均分的降低影响强于理科;相较于母体大学为“一流学科”和“双非”高校的转设学校,转设对母体大学为“一流大学”的独立学院录取平均分的降低影响更大;所在地为“一线城市”的转设学校,其录取平均分下降幅度比在“二线城市”和“三线城市”的转设学校更大。在推动独立学院全面转设的政策背景下,转设学校应当把握时机,实现高质量发展,以重塑和提升大学声誉。在声誉管理方面,应加强校园文化建设和舆论引导,在转设过程中要与母体大学继续保持良好合作关系。在类型定位方面,应明晰学校发展目标定位,及时调整学科专业结构和人才培养结构,走高质量发展和特色发展道路。在区域布局方面,应制定详细的转设方案,权衡各种影响因素。同时,为优化办学成本和促进区域均衡发展,相关学校在转设时可考虑迁址办学。

关键词：大学声誉生源质量独立学院母体大学校园文化名校光环

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中小学教师心理健康素质的空间社会学解析

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教学与管理 2025年第6期 15-19页

作者：钱洁夏杨燕南京晓庄学院教师教育学院南京211171

教师的心理健康素质与教学质量和学生心理健康密切相关,需要在社会关系、情感意义空间、时空延展中统一。从空间社会学的视角看,日常生活中身体的碎片化放置、空间表征中的时空脱域、表征空间中的关系简化、专业发展中的空间压缩影响着... 详细信息

教师的心理健康素质与教学质量和学生心理健康密切相关,需要在社会关系、情感意义空间、时空延展中统一。从空间社会学的视角看,日常生活中身体的碎片化放置、空间表征中的时空脱域、表征空间中的关系简化、专业发展中的空间压缩影响着中小学教师心理健康素质各个维度的完整建构。在感受自我超越性存在的闲暇中彰显个性素质、在政策引导下复归教育教学知能素质、在富有关怀伦理的情绪地理中优化情意素质、在自主自发的工作重塑空间中增进行动素质是教师心理健康素质综合提升的空间社会学实践进路。

关键词：中小学教师心理健康素质空间社会学情绪地理

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可调式空气引射器的热流固耦合变形计算及强度分析

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汽轮机技术 2025年第1期67卷 17-20,62页

作者：闫利如马素霞太原理工大学电气与动力工程学院太原030024

以某可调式空气引射器为研究对象建立了有限元模型,基于Workbench软件,首先对内部流场进行数值模拟,分析了弯管和封头结构对引射器流场特性的影响,再通过稳态耦合计算,研究了引射器的耦合变形及应力分布,最后对引射器强度进行评定。结... 详细信息

以某可调式空气引射器为研究对象建立了有限元模型,基于Workbench软件,首先对内部流场进行数值模拟,分析了弯管和封头结构对引射器流场特性的影响,再通过稳态耦合计算,研究了引射器的耦合变形及应力分布,最后对引射器强度进行评定。结果表明:曲率半径为3 D的弯头内工作流体流动更均匀;锥形封头可以使两股流体更快混合,并有助于提升引射效率;该引射器在热流固耦合下的最大变形量为0.27mm,应力主要集中于喷嘴位置,最大应力值为311.8MPa,对比流固耦合下的应力分布,发现热载荷是造成应力的主要因素;经过强度评定,设备不会发生强度失效。本研究为可调式引射器的结构设计和强度分析提供了指导。

关键词：空气引射器数值模拟结构设计强度评定

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三赞胶复合保鲜剂对草鱼鱼肉保鲜效果的研究

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食品安全导刊 2025年第06期 74-77页

作者：阎霞天津市食品安全检测技术研究院

三赞胶作为一种新型微生物源类食品胶，具有很好的涂膜性、增稠性和凝胶性。为了拓展三赞胶在草鱼鱼肉保鲜中的应用，本实验以三赞胶为主要涂膜材料，与羧甲基纤维素（Carboxymethyl Cellulose,CMC）、普鲁兰多糖、结冷胶3种可食用胶复... 详细信息

三赞胶作为一种新型微生物源类食品胶，具有很好的涂膜性、增稠性和凝胶性。为了拓展三赞胶在草鱼鱼肉保鲜中的应用，本实验以三赞胶为主要涂膜材料，与羧甲基纤维素（Carboxymethyl Cellulose,CMC）、普鲁兰多糖、结冷胶3种可食用胶复配，对草鱼鱼肉进行涂膜，并以草鱼鱼肉贮藏期间失重率、挥发性盐基氮（Total Volatile Base Nitrogen,TVB-N）、菌落总数等指标为标准，筛选适合草鱼鱼肉的三赞胶复合涂膜保鲜剂。结果显示，在草鱼鱼肉保鲜过程中，使用了3种复配涂膜保鲜剂的样品中的各个指标均不同程度高于对照组，尤其是1%三赞胶普鲁兰多糖复配保鲜剂保鲜效果最好，涂膜保鲜组后期失重率较对照组减少了51.05%，挥发性盐基氮降低了36.63%，菌落总数降低了28.29%。

关键词：三赞胶涂膜草鱼鱼肉保鲜

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