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High Voltage 2024年第2期9卷 356-366页

作者： pan Duan Lianfang Zhang Xiaogang Huang Jian Sun Yue qi qing Yang School of Automation Chongqing University of Posts and TelecommunicationsChongqingChina Chongqing Power Co Tongnan BurChongqingChina China Southern Power Grid Science Research Institute GuangzhouChina State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqingChina

Accurate simulation of lightning-induced overvoltage for overhead distribution lines is helpful to prevent lightning trip *** electromagnetic return-stroke model was used to represent lightning and then a 3D finite-difference time-domain(FDTD)method was adopted to simulate the lightning-induced overvoltage on a distribution line without a field-line coupling *** lightning-induced overvoltage behave for different ground conductivity and varying distance between the distribution line and the lightning channel was *** results showed that the overvoltage waveforms at the centre point of the line corresponding to lightning strikes on the lossy ground and an ideal ground(σ=∞)were similar;however,the peak amplitudes of the waveform were affected by soil conductivity at a close *** relationship between magnitude of the overvoltage and distance can be described by a second-order exponential decay ***,the overvoltage calculated using the proposed model was compared with those obtained based on Agrawal's model and measurements made using the newly developed intelligent insulator on *** these comparisons,it could be concluded that the FDTD method with the electromagnetic return-stroke model produces reasonably accurate results of the attenuated oscillation waveform,which can better reproduce the overvoltage on operational distribution lines.

关键词： lightning distribution return

The acceptance of traditional Chinese medicine among patients with Parkinson's disease:A hospital survey

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Journal of Integrative Medicine 2024年第2期22卷 180-187页

作者： Peng Wang Jing Hong Zhu-qian Tang Bi-zhen Gong Xiao-rong qi Han Jiang Bo pan qi Chen Postgraduate School Medical School of Chinese People’s Liberation ArmyBeijing 100853China Senior Department of Traditional Chinese Medicine the Sixth Medical Center of PLA General HospitalBeijing 100853China Department of Integration of Chinese and Western Medicine School of Basic Medical SciencesPeking UniversityBeijing 100191China Department of Integrative Oncology the First Affiliated Hospital of Naval Medical UniversityShanghai 200433China School of Traditional Chinese Medicine Naval Medical UniversityShanghai 200433China School of Pharmacy Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Department of Dermatology the First Clinical Medical CollegeAnhui University of Chinese MedicineHefei 230012Anhui ProvinceChina

Objective:The efficacy of medications for Parkinson’s disease(PD)tend to decline over time,which has a serious impact on patients’health and quality of *** some extent,traditional Chinese medicine(TCM)can resolve the distressing problem of ineffective dopaminergic medication in PD *** purpose of this study was to investigate the attitude,acceptance,and independent predictors of TCM in PD patients admitted to the outpatient department of a tertiary ***:A cross-sectional study of PD patients was conducted in the outpatient department of a large tertiary hospital in Beijing from March 2022 to June 2023.A self-report questionnaire was developed to investigate PD patients’attitudes and acceptance of TCM based on the *** logistic regression analyses were also performed to further clarify the independent predictors influencing patients’adoption of TCM ***:A total of 397 patients completed the questionnaire,of which 78.09%were willing to be treated with TCM and 21.91%indicated that they were not willing to use *** logistic regression analysis showed that several parameters were correlated with a patient’s willingness to include TCM in their therapeutic *** included education level of a bachelor’s degree(odds ratio[OR)=8.554;95%confidence interval[CI]:4.112–17.794;P<0.001,vs junior high school education),living in an urban setting(OR=8.022;95%CI:4.577–14.060;P<0.001,vs rural),having other underlying diseases(OR=5.126;95%CI:3.078–8.537;P<0.001,vs none),having previously used TCM(OR=3.083;95%CI:1.852–5.134;P<0.001,vs not used),believing that TCM therapy is safe(OR=3.530;95%CI:1.446–8.616;P=0.006,vs not thought),believing that TCM therapy is effective(OR=3.859;95%CI:1.482–10.047;P=0.006,vs not understood),and being willing to discuss ongoing TCM therapy with an attending physician(OR=62.468;95%CI:30.350–128.574;P<0.001,vs not informed).Conclusion:This study initially investigated the acceptance

关键词： Parkinson's disease Traditional Chinese medicine Cross-sectional study

Crystallization of RE_(2)(OH)_(2)CO_(3)SO_(4)·nH_(2)O as a new family of layered hydroxides(RE=Gd-Lu lanthanides and Y),derivation of RE_(2)O_(2)SO_(4),photoluminescence and optical thermometry

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Journal of Rare Earths 2024年第8期42卷 1496-1506,I0003页

作者： Fan Li Zhenqi Song Zhiyuan pan Sihan Feng qi Zhu Ji-Guang Li Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China Research Center for Functional Materials National Institute for Materials ScienceTSsukuboaIbaraki3050044Japan

Layered rare-earth hydroxides(LREHs) draw wide research interest because of their peculiar crystal structure,rich interlayer chemistry and abundant functionality of the RE element,but are limited to the two categories of RE_(2)(OH)_(5)A·nH_(2)O(A:typical of Cl^(-)or NO_(3)^(-)) and RE_(2)(OH)_(4)SO_(4)·nH_(2)*** the other hand,rare-earth oxysulfates(RE_(2)O_(2)SO_(4)) have attracted attention due to their properties of large-capacity oxygen storage,low-temperature magnetism and luminescence,but their preparation procedure mostly involves toxic SO_(x) gases and/or complicated *** this work,RE_(2)(OH)_(2)CO_(3)SO_(4)·nH_(2)O as a new family of LREHs(RE=Gd-Lu lanthanides and Y) were produced via hydrothermal reaction,from which phase-pure RE_(2)O_(2)SO_(4) was derived via subsequent annealing at 800℃ in air without the involvement of SO_(x),The compounds were thoroughly characterized to reveal the intrinsic influence of lanthanide contraction(RE^(3+) radius) on crystal structure,thermal behavior(dehydroxylation/decarbonation/desulfurization),vibrational property and crystallite *** analyzing the photoluminescence of Eu^(3+) and Sm^(3+)in the Gd_(2)O_(2)SO_(4) typical host it is found that the 617 nm(Eu^(3+),λ_(ex)=275 nm) and 608 nm(Sm^(3+),λ_(ex)=407 nm) main emissions can retain as high as ^(7)9.6% and 85.5%of their room-temperature intensities at 423 K,with activation energies of ~0.19 and 0.21 eV for thermal quenching,*** also indicates that both the phosphors have the potential for optical temperature sensing via the fluorescence intensity ratio(FIR) technology,whose maximum relative sensitivity reaches -2.70%/K for Eu^(3+)and 1.73%/K for Sm^(3+) at 298 K.

关键词： Layered hydroxide RE_(2)O_(2)SO_(4) Luminescence Optical temperature sensing Rare earths

Late-Time Evolution of the Phantom Scalar Perturbation in the Background of a Spherically Symmetric Static Black Hole

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Chinese Physics Letters 2010年第6期27卷 9-12页

作者： pan qi-Yuan JING Ji-Liang Institute of Physics and Department of Physics Hunan Normal University Changsha 410081

The late-time evolution of the phantom scalar perturbation is investigated in the spacetime of a four-dimensionai spherically symmetric static black hole. It is revealed that the asymptotic tail of the phantom scalar field is dominated by the growth behavior t-（l＋3/2）eμt, which depends on the multipole moment l and the field moss but is independent of the mass M and charge Q of the black hole. This growth behavior is in strong contrast to the decaying tall of the usual massive scalar perturbation and shows that the external phantom scalar perturbation is unstable in the spherically symmetric static black hole spacetime.

关键词： Limonium sinuatum Growth Tail Fields

Enhanced ferromagnetism and magnetoelectric response in quenched BiFeO3-based ceramics

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Chinese Physics B 2020年第8期29卷 465-470页

作者： qi pan Bao-Jin Chu Key Laboratory of Materials for Energy Conversion Chinese Academy of Sciences(CAS)Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

The piezoelectric,ferromagnetism,and magnetoelectric response of BiFeO3-BaTiO3 ceramics with the compositions around the morphotropic phase boundary(MPB)of the solid solution are systematically investigated after the ceramics have been quenched from a high *** find that the ferromagnetism of the quenched ceramics is greatly *** enhanced piezoelectric response d33 larger than 200 pC/N,which could be sustained up to 350℃,is *** a result of enhanced ferromagnetism and piezoelectric response,a large magnetoelectric response^1.3 V/cm·Oe(1 Oe=79.5775 A·m^-1)is obtained near the mechanical resonance frequency of the quenched ceramic *** research also shows that in addition to the ferromagnetism and piezoelectric response,the mechanical quality factor is another important parameter to achieve high magnetoelectric response because the physical effects are coupled through mechanical interaction in BiFeO3-based *** work suggests that quenching is an effective approach to enhancing the magnetoelectric response of BiFeO3-based materials and the materials belong to single-phase multiferroic materials with high magnetoelectric response.

关键词： multiferroic materials magnetoelectric ferromagnetic piezoelectric

One droplet reaction for synthesis of multi-sized nanoparticles

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Nano Research 2023年第4期16卷 5850-5856页

作者： Bingda Chen Feifei qin Meng Su Daixi Xie Zeying Zhang qi pan Huadong Wang Xu Yang Sisi Chen Jingwei Huang Dominique Derome Jan Carmeliet Yanlin Song Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences(BNLMS)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China Chair of Building Physics Department of Mechanical and Process EngineeringETH Zürich(Swiss Federal Institute of Technology in Zürich)Zürich 8092Switzerland Department of Civil and Building Engineering Universitéde SherbrookeSherbrooke QC J1K 2R1Canada

Reaction kinetics of nanoparticles can be controlled by tuning the Peclet number(Pe)as it is an essential parameter in synthesis of multi-sized ***,we propose to implement a self-driven multi-dimension microchannels reactor(MMR)for the one droplet synthesis of multi-sized *** carefully controlling the Pe at the gas-liquid interface,the newly formed seed crystals selectively accumulate and grow to a specific *** the combination of microchannels of different widths and lengths,one droplet reaction in the same apparatus achieves the synchronous synthesis of diverse *** enables precise control of nanoparticle diameter at 5 nm precision in the range of 10-110 *** use of MMR can be extended to the synthesis of uniform Ag,Au,Pt,and Pd nanoparticles,opening towards the production and engineering of nanostructured *** approach gives the chance to regulate the accumulation probability for precise synthesis of nanoparticles with different diameters.

关键词： gas-liquid interface accumulation effect one droplet reaction multi-sized nanoparticles

Programmable soft bending actuators with auxetic metamaterials

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Science China(Technological Sciences) 2020年第12期63卷 2518-2526页

作者： pan qi CHEN ShiTong CHEN FeiFei ZHU XiangYang Robotics Institute School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China

Soft robotics has been receiving increasing attention due to its flexibility and adaptability offered by embodied intelligence. A soft robot may undergo complex motions including stretching,contraction,bending,twisting,and their intricate *** these basic motions,bending plays a central role when a robot accomplishes tasks such as locomotion,grasping and manipulation. Although a rich repertoire of bending mechanisms has been reported,a systematic and rational design framework is still lack. In this paper,we provide a novel design strategy for soft bending actuators which allows integral modeling and design optimization. Nowadays,metamaterials are emerging as a new tool for soft robots,by encoding the desired complex motions directly within the material architectures,leading to conformable monolithic systems. We combine pneumatic actuators and flexible metamaterials to provide an alternative solution to soft bending actuators,with advantages of compact design,large bending motion,and convenient fabrication. A regular pneumatic chamber is embedded inside auxetic and non-auxetic metamaterials,and bending is generated when inflated. We carry out dimensionless analysis to identify the key design variables. To provide insight into design optimization,we develop a computation framework by modeling metamaterial structures with beam elements and the inner chamber with shell elements as an integral part,allowing efficient simulation of the coupled system. We systematically investigate how the bending angle varies with the key design variables and find the optimal design *** experimental results are well in line with the simulation,and a remarkable bending motion of 0.43°/mm is achieved.

关键词： soft robotics bending actuator auxetic metamterials negative Poisson’s ratio

Research Progress on Effective Implementation of Whole Process Nursing Model for Patients with Cervical Cancer

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Journal of Advances in Medicine Science 2022年第1期5卷 7-11页

作者： Jierong Lu qi pan Affiliated Cancer Hospital of Guangxi Medical University NanningGuangxi530000China

Cervical cancer has a high mortality rate in *** disease seriously threatens the physical and mental health and life safety of *** present,radical surgery is mainly used for treatment,but in order to reduce the incidence of intraoperative and postoperative complications,corresponding nursing needs to be *** time focuses on the complications after radical surgery for cervical cancer,and puts forward the nursing methods of common complications of transabdominal radical surgery for cervical *** order to improve the quality of nursing and life of patients,this paper summarizes the effective implementation of the whole process nursing model after cervical cancer surgery.

关键词： Cervical cancer Whole course nursing mode Implementation

膝骨关节炎患者膝痛和膝冷与髌下脂肪垫神经支配病理特征的相关性分析

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中华解剖与临床杂志 2024年第4期29卷 249-256页

作者：刘妍亓攀闵红巍张睿唐鹏崔志刚刘克敏首都医科大学康复医学院北京100068 中国康复研究中心北京博爱医院骨与骨关节康复科北京100068

目的探讨膝骨关节炎(KOA)患者髌下脂肪垫神经支配的病理特征及其与患者膝关节痛、冷感觉的相关性。方法前瞻性非随机对照研究。纳入2022年2—12月中国康复研究中心北京博爱医院29例(29膝)KOA患者为KOA组,纳入同期8例(8膝)膝关节或膝关... 详细信息

目的探讨膝骨关节炎(KOA)患者髌下脂肪垫神经支配的病理特征及其与患者膝关节痛、冷感觉的相关性。方法前瞻性非随机对照研究。纳入2022年2—12月中国康复研究中心北京博爱医院29例(29膝)KOA患者为KOA组,纳入同期8例(8膝)膝关节或膝关节周围组织急性创伤的非KOA患者为对照组。KOA组男8例、女21例,年龄61~95[70.0(64.5,76.5)]岁,均行初次全膝关节置换术治疗,对照组男6例、女2例,年龄30~84[61.0(30.5,81.0)]岁,接受开放手术或关节镜手术治疗。术前采用疼痛视觉模拟评分法(VAS)评分、西安大略和麦克马斯特大学骨关节炎指数(WOMAC)、膝关节协会评分(KSS)和膝冷评分定量评价KOA患者的膝关节疼痛、寒冷程度,并根据Kellgren-Lawrence(K-L)影像分级系统对KOA患者进行K-L分级。采用免疫荧光法检测2组患者髌下脂肪垫内降钙素基因相关肽(CGRP)阳性感觉神经和酪氨酸羟化酶(TH)阳性交感神经的密度,采用酶联免疫吸附试验(ELISA)检测KOA组患者髌下脂肪垫内CGRP含量。观察指标:(1)比较2组患者的性别、年龄、侧别、体质量指数(BMI)等基线资料。(2)比较2组患者髌下脂肪垫中免疫荧光检测CGRP阳性感觉神经和TH阳性交感神经密度的差异,(3)比较不同K-L分级患者免疫荧光检测CGRP阳性感觉神经和TH阳性交感神经密度的差异,(4)分析CGRP阳性感觉神经、TH阳性交感神经及CGRP含量与VAS评分、WOMAC、KSS、膝冷评分的相关性,(5)分析膝冷评分与K-L分级、VAS评分和WOMAC疼痛分量表的相关性。结果(1)2组患者的年龄、侧别、BMI比较,差异均无统计学意义(P值均>0.05),性别差异有统计学意义(P=0.035)。(2)KOA组CGRP阳性感觉神经密度[17.65(5.88,23.53)fibers/mm^(2)]高于对照组[2.94(0.00,16.18)fibers/mm^(2)],TH阳性交感神经密度[11.76(0.00,17.65)fibers/mm^(2)]低于对照组[20.59(13.23,29.41)fibers/mm^(2)],差异均有统计学意义(Z=2.16、2.48,P值均0.05)。结论KOA患者髌下脂肪垫内CGRP含量增高会加重其膝关节痛、冷感觉,而TH阳性交感神经密度增高会减轻其膝关节痛、冷感觉。尽管未发现CGRP阳性感觉神经密度与膝关节痛、冷感觉之间的关系,但是CGRP含量与膝关节痛冷感之间存在一定的相关性。

关键词：骨关节炎膝膝痛膝冷髌下脂肪垫感觉神经交感神经

Ordered Bicontinuous Network Structures Regulated by Orientational Interactions in a Rod-Coil Block Copolymer

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Chinese Journal of Polymer Science 2024年第5期42卷 636-642,I0008页

作者： Xiao-Lin Lyu Shi-Chu Yang An-qi Xiao Ping-Ping Hou Wei Zhang Hong-Bing pan Zhi-Hao Shen Xing-He Fan qi-Feng Zhou Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China Key Laboratory of Advanced Materials Technologies International(HongKong Macao and Taiwan)Joint Laboratory on Advanced Materials TechnologiesCollege of Materials Science and EngineeringFuzhou UniversityFuzhou350108China

The rich phase behavior of block copolymers(BCPs)has drawn great attention in recent ***,the double diamond(DD)phase is rarely obtained because of the competition between the minimization of interfacial energy and packing ***,a rod-coil BCP containing mesogen-jacketed liquid crystalline polymer is designed to acquire ordered bicontinuous network *** reduction of internal energy originating from the orientational interaction among the rod blocks can compensate for the free energy penalty of packing frustration to stabilize the DD *** resulting BCP can also experience lamellae-to-DD and double gyroid-to-lamellae transitions by changing the annealing *** results make the rod-coil BCP an excellent candidate for the self-assembly of ordered network structures,demonstrating great potential in nanopatterning and metamaterials.

关键词： Block copolymer Rod-coil Ordered bicontinuous phase Double diamond Double gyroid