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Nuclear Science and Techniques 2024年第4期35卷 119-135页

作者： Chuang Shen Ying-Shun Zhu Fu-san chen China Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of Sciences1 Zhongziyuan RoadDongguan 523000China Institute of High Energy Physics Chinese Academy of Sciences19B Yuquan RoadBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Currently,three types of superconducting quadrupole magnets are used in particle accelerators:cos 2θ,CCT,and ***,all three coil configurations have complex spatial geometries,which make magnet manufacturing and strain-sensitive superconductor applications *** with the three existing quadrupole coils,the racetrack quadrupole coil has a simple shape and manufacturing process,but there have been few theoretical *** this paper,the two-dimensional and three-dimensional analytical expressions for the magnetic field in coil-dominated racetrack superconducting quadrupole magnets are *** analytical expressions of the field harmonics and gradient are fully resolved and depend only on the geometric parameters of the coil and current ***,a genetic algorithm is applied to obtain a solution for the coil geometry parameters with field harmonics on the order of 10^(-4).Finally,considering the practical engineering needs of the accelerator interaction region,electromagnetic design examples of racetrack quadrupole magnets with high gradients,large apertures,and small apertures are described,and the application prospects of racetrack quadrupole coils are analyzed.

关键词： Superconducting quadrupole magnet Racetrack coil Multipole field Genetic algorithm Magnetic design

Electroacupuncture for post-stroke anxiety disorder on the base of the heart-brain theory:A randomized controlled trial

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World Journal of Acupuncture-Moxibustion 2020年第1期30卷 23-28页

作者： Ran LIU san-san chen Jun WANG Department of Pediatrics the First Affiliated Hospital of Henan University of Traditional Chinese MedicineZhengzhou 450000China Department of Acupuncture and Moxibustion Majiapu Health Service CenterFengtai DistrictBeijing 100071China Department of Acupuncture and Moxibustion Dongzhimen Hospital Affiliated to Beijing University of Chinese MedicineBeijing 100700China

Objective:To evaluate the differences in the clinical effect and the safety in the treatment of post-stroke anxiety disorder(PSAD)between electroacupuncture(EA)and paroxetine on the base of the heart-brain ***:A total of 70 patients of PSAD were randomized into an EA group and a medication group,35 cases in each *** the EA group,four acupoints were selected and divided into two *** the Pair A,there were Baihui(百会GV20)and Fengfu(风府GV16).In the Pair B,there were Xinshu(心俞BL15)and Shenmen(神门HT7).After acupuncture,the electroacupuncture apparatus was *** duration of needle retention was 20 *** was given three times a week,totally for 4 *** the medication group,paroxetine tablets were administered orally,10 mg daily in the first 4 days and 20 mg afterwards,totally for 4 *** and after treatment,as well as in the follow-up period,Hamilton anxiety scale(HAMA),Barthel index(BI)for daily life ability,and clinical global impression(CGI)were observed and the clinical therapeutic effect was evaluated ***:A total of 3 cases were dropped-out in the medication ***,35 cases in the EA group and 32 cases in the medication group were included in the *** with the scores before treatment,the scores of HAMA and CGI-SI(severity of illness)were lower and the scores of BI were higher after treatment and during the follow-up in either the EA group or the medication group(all P0.05).Compared with the medication group,BI score in the EA group was higher in the follow-up,indicating the statistical significance(P<0.05).After treatment,CGI-SI score was different statistically between the EA group and the medication group(P<0.05).There were 5 cases with adverse reactions in the EA group and 9 cases in the medication ***:Th

关键词： Electroacupuncture Brain-heart theory Paroxetine Post-stroke anxiety disorder

Proposal for valleytronic materials:Ferrovalley metal and valley gapless semiconductor

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Frontiers of physics 2024年第2期19卷 131-139页

作者： san-Dong Guo Yu-Ling Tao Guangzhao Wang Shaobo chen Dong Huang Yee Sin Ang School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information EngineeringYangtze Normal UniversityChongqing 408100China College of Electronic and Information Engineering Anshun UniversityAnshun 561000China Science Mathematics and Technology(SMT)Singapore University of Technology and Design(SUTD)8 Somapah RoadSingapore 487372Singapore

Valleytronic materials can provide new degrees of freedom to future electronic *** this work,the concepts of the ferrovalley metal(FVM)and valley gapless semiconductor(VGS)are proposed,which can be achieved in valleytronic bilayer systems by electric field *** valleytronic bilayer systems,the interaction between out-of-plane ferroelectricity and A-type antiferromagnetism can induce layer-polarized anomalous valley Hall(LP-AVH)*** K and−K valleys of FVM are both metallic,and electron and hole carriers simultaneously *** the extreme case,the FVM can become VGS by analogizing spin gapless semiconductor(SGS).Moreover,it is proposed that the valley splitting enhancement and valley polarization reversal can be achieved by electric field engineering in valleytronic bilayer *** the bilayer RuBr_(2)as an example,our proposal is confirmed by the first-principle *** FVM and VGS can be achieved in bilayer RuBr_(2)by applying electric *** appropriate electric field range,increasing electric field can enhance valley splitting,and the valley polarization can be reversed by flipping electric field *** effectively tune valley properties by electric field in bilayer systems,the parent monolayer should possess out-of-plane magnetization,and have large valley *** results shed light on the possible role of electric field in tuning valleytronic bilayer systems,and provide a way to design the ferrovalley-related material by electric field.

关键词： valleytronics electric field bilayer

Acupuncture on back-shu points of five zang for chronic fatigue syndrome:A randomized control trial

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World Journal of Acupuncture-Moxibustion 2018年第4期28卷 237-241,309-310页

作者： san-san chen Ran LIU Bin WU Sheng chen Fang GUO Xiao-lin XUE Jun WANG Acupuncture Department Dongzhimen HospitalBeijing University of Chinese MedicineBeijing 100700China Chinese Medicine Department People’s HospitalBeijing UniversityBeijing 100044China Beijing University of Chinese Medicine Beijing 100029China

Objective: To observe the clinical efficacy of acupuncture on back-shu points of five zang in treating chronic fatigue syndrome(CFS).Methods: Sixty patients were randomized into treatment group and control group. In treatment group,the back-shu points of five zang organs were adopted for acupuncture. Shènshū(肾俞 BL23) was perpendicularly needled 15-30 mm in depth. The rest of the selected points were inserted obliquely 15-30 mm in the direction of the spine with even method of lifting-thrusting and twisting-twirling, 10 s for each acupoint. In control group, the acupoints were approximately 1.5-2 cm away outward from the back-shu points of five zang organs(about on the middle of the two sidelines of the bladder meridian of foottaiyang) and the points from the bladder meridian of foot-taiyang were excluded. Acupoints were needled6-9 mm in depth, and deqi was not required, without any manipulation. The treatments were carried out twice a week for twenty minutes each time, a total of eight treatments were given. The clinical efficacy of acupuncture treatment for CFS was evaluated through the Fatigue Scale-14(FS-14) and the Symptom Check-List 90(SCL-90) after ***: The total effective rate was 86.67% in the treatment group and 53.33% in the control group(P<0.01). In treatment group, FS-14 total scores, somatic fatigue scores, and mental fatigue scores were significantly reduced than before treatment(all P<0.01). In control group, FS-14 total scores and somatic fatigue scores were significantly reduced(both P<0.01). The improvement of FS-14 total scores, somatic fatigue scores, and mental fatigue scores in the treatment group were better than those in the control group(P<0.01, P<0.05). After treatment, SCL-90 total scores and somatization, compulsion, interpersonal sensitivity, depression, anxiety, hostility, psychoticism, and other factors scores were significantly reduced in the treatment group compared with before treatment(P<0.01). In control group, the S

关键词： Chronic fatigue syndrome Back-shu points of five zang Acupuncture thrapy Randomized control trial

Microvascular alterations of the ocular surface and retina in connective tissue disease-related interstitial lung disease

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International Journal of Ophthalmology(English edition) 2024年第10期17卷 1869-1879页

作者： Li-Ming chen Min Kang Jun-Yi Wang san-Hua Xu cheng chen Hong Wei Qian Ling Liang-Qi He Jie Zou Yi-Xin Wang Xu chen Ping Ying Hui Huang Yi Shao Rui Wu Department of Rheumatology the First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Ophthalmology the First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina The First School of Clinical Medicine of Nanchang University Jiangxi Medical College of Nanchang UniversityNanchang 330000Jiangxi ProvinceChina School of Optometry and Vision Science Cardiff UniversityCardiffCF244HQWalesUK Ophthalmology Centre of Maastricht University Maastricht 6200MSLimburg ProvincieNetherlands Department of Ophthalmology Eye&ENT Hospital of Fudan UniversityShanghai 200030China

AIM:To examine the disparities in macular retinal vascular density between individuals with connective tissue disease-related interstitial lung disease(CTD-ILD)and healthy controls(HCs)by optical coherence tomography angiography(OCTA)and to investigate the changes in microvascular density in abnormal ***:For a retrospective case-control study,a total of 16 patients(32 eyes)diagnosed with CTD-ILD were selected as the ILD *** 16 healthy volunteers with 32 eyes,matched in terms of age and sex with the patients,were recruited as control *** macular retina’s superficial retinal layer(SRL)and deep retinal layer(DRL)were examined and scanned using OCTA in each individual *** densities of retinal microvascular(MIR),macrovascular(MAR),and total microvascular(TMI)were calculated and *** in retinal vascular density in the macular region were analyzed using three different segmentation methods:central annuli segmentation method(C1-C6),hemispheric segmentation method[uperior right(SR),superior left(SL),inferior left(IL),and inferior right(IR)],and Early Treatment Diabetic Retinopathy Study(ETDRS)methods[superior(S),inferior(I),left(L),and right(R)].The data were analyzed using Version 9.0 of GraphPad prism and Pearson ***:The OCTA data demonstrated a statistically significant difference(P<0.05)in macular retinal microvessel density between the two ***,in the SRL and DRL analyses,the ILD group exhibited significantly lower surface density of MIR and TMI compared to the HCs group(P<0.05).Furthermore,using the hemispheric segmentation method,the ILD group showed notable reductions in SL,SR,and IL in the superficial retina(P<0.05),as well as marked decreases in SL and IR in the deep retina(P<0.05).Similarly,when employing the ETDRS method,the ILD group displayed substantial drops in superficial retinal S and I(P<0.05),along with notable reductions in deep retinal L,I,and R(P<0.05).In the central annuli segmentation m

关键词： connective tissue disease‑related interstitial lung disease optical coherence tomography angiography microvessel density ocular surface retina

Megafossils of Betulaceae from the Oligocene of Qaidam Basin and their paleoenvironmental and phytogeographic implications

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Plant Diversity 2024年第1期46卷 101-115页

作者： Tao Yang Jia-Hao Cai Yan-Zhi Dai Hong-Yu chen Lei Han Li Zhang Wei-Yu Liang Xu-Jun Li Wen-Jia Li Jing-Yu Wu san-Ping Xie De-Fei Yan School of Earth Sciences and Key Laboratory of Mineral Resources in Western China(Gansu Province) Lanzhou UniversityLanzhou 730000China Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China Center for Research and Education on Biological Evolution and Environments School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023China

Understanding the paleoenvironment and phytogeographical history of the Tibetan Plateau,China relies on discovering new plant *** Qaidam Basin has long been regarded as an ideal‘field laboratory’to investigate the paleoclimate and paleobiological evolution of the northern Tibetan ***,fossil angiosperms from the Qaidam Basin are rare,and our knowledge of its paleovegetation is ***,we report fossil leaves and fruits of Betulaceae found from the Oligocene Shangganchaigou Formation of northwestern Qaidam Basin(Huatugou area).Comparative morphological analysis led us to assign the fruits to the Betula subgenus Betula and the leaves to Carpinus *** findings,together with other reported fossil plants from the same locality,reveal a close floristic linkage between the Qaidam Basin and Europe during the *** northern pathway of this floristic exchange may have crossed through the Qaidam Basin during the late *** floristic linkage may have been facilitated by the continuous narrowing of the Turgai Strait and stronger westerlies,which transported moisture and provided favorable climatic ***,fossil plants collected from the Qaidam Basin suggest that during the Oligocene this region had warm and humid deciduous broad-leaf forest,which differs from the region’s modern vegetation and indicates that the Qaidam Basin may have been a suitable region for these plants to flourish and spread during the Oligocene.

关键词： Paleoenvironment Biogeography Betulaceous fossil Qaidam basin Tibetan Plateau Oligocene

Glymphatic function and its influencing factors in different glucose metabolism states

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World Journal of Diabetes 2024年第7期15卷 1537-1550页

作者： Bin Tian chen Zhao Jia-Li Liang Hui-Ting Zhang Yi-Fan Xu Hui-Lei Zheng Jia Zhou Jiang-Nian Gong Shu-Ting Lu Zi-san Zeng Department of Radiology The First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Magnetic Resonance Research Collaboration Siemens HealthineersGuangzhou 510620Guangdong ProvinceChina Magnetic Resonance Research Collaboration Siemens Healthineers Ltd.Wuhan 430071Hubei ProvinceChina Department of Health Management The First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Department of Endocrinology The First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina

BACKGROUND Dysfunction of the glymphatic system in the brain in different stages of altered glucose metabolism and its influencing factors are not well *** To investigate the function of the glymphatic system and its clinical correlates in patients with different glucose metabolism states,the present study employed diffusion tensor imaging along the perivascular space(DTI-ALPS)*** Sample size was calculated using the pwr package in R *** crosssectional study enrolled 22 patients with normal glucose metabolism(NGM),20 patients with prediabetes,and 22 patients with type 2 diabetes mellitus(T2DM).A 3.0T magnetic resonance imaging was used to evaluate the function of the glymphatic *** mini-mental state examination(MMSE)was used to assess general cognitive *** DTI-ALPS index of bilateral basal ganglia and the mean DTI-ALPS index was ***,the correlation between DTI-ALPS and clinical features was *** The left-side,right-side,and mean DTI-ALPS index in the T2DM group were significantly lower than that in the NGM *** right-side DTI-ALPS and mean DTI-ALPS index in the T2DM group were significantly lower than those in the prediabetes ***-ALPS index lateralization was not *** MMSE score in the T2DM group was significantly lower than that in the NGM and prediabetes *** controlling for sex,the left-side DTI-ALPS and mean DTI-ALPS index in the prediabetes group were positively correlated with 2-hour postprandial blood glucose level;the left-side DTI-ALPS index was negatively correlated with total cholesterol and low-density lipoprotein *** right-side DTI-ALPS and mean DTI-ALPS index were negatively correlated with the glycosylated hemoglobin level and waist-to-hip ratio in the prediabetes *** left-side,right-side,and mean DTI-ALPS index in the T2DM group were positively correlated with *** left-side and mean DTIALPS index in the T2DM group were negatively

关键词： Glymphatic system Prediabetes Type 2 diabetes mellitus Magnetic resonance imaging Diffusion tensor imaging along the perivascular space

中小学教师的职业认同与应对方式、自尊的关系

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湖南第一师范学院学报 2016年第6期16卷 10-15页

作者：洪明吕三三陈秀芹岭南师范学院教育科学学院广东湛江524048 贵州师范大学教育科学学院贵州贵阳550001

以广东省388名中小学教师为对象考察教师的职业认同及其与应对方式、自尊的关系。结果表明:女教师的角色价值观得分显著高于男教师。中级和高级职称教师的职业归属感均显著高于初级职称教师。中小学教师的职业认同总分及其四个维度在学... 详细信息

以广东省388名中小学教师为对象考察教师的职业认同及其与应对方式、自尊的关系。结果表明:女教师的角色价值观得分显著高于男教师。中级和高级职称教师的职业归属感均显著高于初级职称教师。中小学教师的职业认同总分及其四个维度在学校层次、学校所在地上均不存在显著差异。自尊与积极应对方式显著正相关,与消极应对方式显著负相关。积极应对方式和自尊能显著正向预测职业认同总分及其四个维度。中小学女教师的自尊在积极应对方式与职业认同之间起部分中介作用。

关键词：职业认同应对方式自尊中小学教师

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中枢模式发生器与足端轨迹的非线性映射

仪器仪表学报 2024年第4期45卷 258-271页

作者：陈久朋陈治帆伞红军祖永斌昆明理工大学机电工程学院昆明650500 云南省先进装备智能制造技术重点实验室昆明650500

控制的仿生性和行走的稳定性是四足机器人步态研究中重要的两个方面。为了提高四足机器人运动的稳定性,本文通过Hopf振荡器搭建了CPG模型,分别实现了多种步态及步态之间的转换。比较了基于CPG的步态控制方法和轨迹规划的步态规划方法在... 详细信息

控制的仿生性和行走的稳定性是四足机器人步态研究中重要的两个方面。为了提高四足机器人运动的稳定性,本文通过Hopf振荡器搭建了CPG模型,分别实现了多种步态及步态之间的转换。比较了基于CPG的步态控制方法和轨迹规划的步态规划方法在行走上的优劣性。为了同时利用CPG控制和轨迹规划的优点,提出采用神经网络将CPG控制曲线与足端轨迹逆运动学获得的驱动曲线进行非线性映射,使得四足机器人在控制上具备仿生特性,在足端接触上具备零冲击特性。仿真和实验结果表明,采用CPG的步态生成方法和轨迹规划方法四足机器人的行走速度理论行走速度80 mm/s相近,但采用CPG的步态生成方法四足机器人侧向位移在±10 mm以内且俯仰角在±1.5°之间,而采用轨迹规划的控制方法四足机器人侧向位移在±35 mm以内且俯仰角在±4°之间,可见两种控制方式对侧向偏移和俯仰运动的表现不一致。通过实验测量可知,机器人采用walk步态行走速度为18.57 mm/s,与理论行走速度20 mm/s接近,步态转换后以trot步态行走,行走速度为76.15 mm/s,与理论行走速度80 mm/s接近,少许误差可能是装配和行走过程打滑导致的。测量其侧向偏移程度可知,其侧向的偏移量左侧在15 mm内,右侧在25 mm内,其侧向偏移量均在合适的范围内,证明所提算法的有效性。

关键词：四足机器人 CPG模型足端轨迹非线性映射行走稳定性

Strengthening mechanism of T8-aged Al-Cu-Li alloy with increased pre-deformation

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Transactions of Nonferrous Metals Society of China 2024年第10期34卷 3151-3169页

作者： san-xi DENG Jin-feng LI Li WANG Yue-yan chen Zheng-wu XIANG Peng-cheng MA Yong-lai chen Dan-yang LIU School of Materials Science and Engineering Central South UniversityChangsha 410083China Southwest Aluminum(Group)Co. Ltd.Chongqing 401326China Aerospace Research Institute of Materials and Processing Technology Beijing 100076China

The microstructure evolution and mechanical properties of a T8-aged Al-Cu-Li alloy with increased pre-deformation(0-15%) were investigated,revealing the microstructure-strength relationship and the intrinsic strengthening *** results show that increasing the pre-deformation levels remarkably improves the strength of the alloy but deteriorates its *** introduced by pre-deformation effectively suppress the formation of Guinier-Preston(GP) zones and provide more nucleation sites for T1 *** leads to more intensive and finer T1 precipitates in the samples with higher pre-deformation ***,the enhanced precipitation of T1 precipitates and inhibited formation of GP zones cause the decreases in number and sizes of θ′ *** quantitative descriptions of the strength contributions from different strengthening mechanisms reveal that strengthening contributions from T1 and θ′ precipitates decrease with increasing *** reduced diameters of T1 precipitates are primarily responsible for their weakened strengthening ***,the improved strength of the T8-aged Al-Cu-Li alloy is mainly attributed to the stronger strain hardening from the increased pre-deformation levels.

关键词： Al−Cu−Li alloy pre-deformation precipitation strength strengthening mechanism