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Chinese Physics B 2020年第5期29卷 429-434页

作者： Yi-Fan Shen xi-bo yin Chao-Fan Xu Jing He Jun-Ye Li Han-Dong Li xiao-Hong Zhu xiao-Bin Niu College of Materials Science and Engineering Sichuan UniversityChengdu 610064China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054China

Epitaxial growth and structural characteristics of metastableβ-In2Se3 thin films on H-terminated Si(111)substrates are *** In2Se3 thin films grown below theβ-to-αphase transition temperature(453 K)are characterized to be strainedβ-In2Se3 mixed with significantγ-In2Se3 *** pure-phased single-crystallineβ-In2Se3 can be reproducibly achieved by in situ annealing the as-deposited poly-crystalline In2Se3 within the phase equilibrium temperature window ofβ-*** is suggeted that the observedγ-to-βphase transition triggered by quite a low annealing temperature should be a rather lowered phase transition barrier of the epitaxy-stabilized In2Se3 thin-film system at a state far from thermodynamic equilibrium.

关键词： In2Se3 molecular beam epitaxy single-crystalline annealing and quench phase transition

Correlation between anxiety, depression, and social stress in young patients with thoracolumbar spine fractures

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World Journal of Psychiatry 2025年第1期15卷 83-92页

作者： bo Wang Da Shi yin-Di Sun bo Dong Joint Ward of Orthopedics Department of TCM Honghui HospitalXi'an Jiaotong UniversityXi’an 710054Shaanxi ProvinceChina Pain Ward of Orthopedics Department of TCM Honghui HospitalXi'an Jiaotong UniversityXi’an 710054Shaanxi ProvinceChina

BACKGROUND Traumatic injuries,such as falling,car accidents,and crushing mostly cause spinal fractures in young and middle-aged people,and>50%of them are thoracolumbar *** kind of fracture is easily combined with serious injuries to peripheral nerves and soft tissues,which causes paralysis of the lower limbs if there is no timely rehabilitation *** patients with thoracolumbar fractures find it difficult to recover after the operation,and they are prone to depression,low self-esteem,and other negative *** To investigate the association between anxiety,depression,and social stress in young patients with thoracolumbar spine fractures and the effect on rehabilitation *** This study retrospectively analyzed 100 patients admitted to the orthopedic department of Honghui Hospital,xi’an Jiaotong University who underwent thoracolumbar spine fracture surgery from January 2022 to June *** general data of the patients were assessed with the Hamilton anxiety scale(HAMA),Hamilton depression scale(HAMD),life events scale,and social support rating scale(SSRS)to identify the correlation between anxiety,depression scores,and social stress and social *** Japanese Orthopedic Association(JOA)was utilized to evaluate the rehabilitation outcomes of the patients and to analyze the effects of anxiety and depression scores on *** According to the scores of HAMD and HAMA in all patients,the prevalence of depression in patients was 39%(39/100),and the prevalence of anxiety was 49%(49/100).Patients were categorized into non-depression(n=61)and depression(n=39),non-anxiety(n=51),and anxiety(n=49)*** significant differences in gender,occupation,Pittsburgh Sleep Quality Index(PSQI)score,and monthly family income were observed between the non-depression and depression groups(Pxiety and anxiety *** depression(r=0

关键词： Patients with thoracolumbar fractures Anxiety Depression Social pressure Social support

Torsion Instability of Anisotropic Cylindrical Tissues with Growth

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Acta Mechanica Solida Sinica 2019年第5期32卷 621-632页

作者： Sang Ye Si-Fan yin bo Li xi-Qiao Feng Institute of Biomechanics and Medical Engineering AMLDepartment of Engineering MechanicsTsinghua UniversityBeijing 100084China

Growth shapes soft tissues not only through mass addition or volume expansion but also through deformation instabilities and consequent morphological *** this paper,we probe the torsion instability of an anisotropically growing tube with fiber reinforcement,which mimics many tubular organs in animals or *** derive the Stroh formulation for the incremental boundary value problem and numerically solve it using the surface impedance method.A linear st ability analysis is conducted to investigate the critical condition for the onset of *** thresholds of helical wrinkling are calculated in terms of growth ratio and external *** effect of fibers on the critical state under axial stretching is *** is found that the tangential growth tends to enhance the critical torsion angle but has a weak influence on the critical longitudinal mode of wrinkling,which,however,can be remarkably affected by the axial *** study can help understand the formation of helical morphologies in biological mat erials and provide cues for engineering desired st ruc tu res or devices.

关键词： Biological material Tube Growth Instability Stroh formulation

Experimental investigation of dynamic characteristics of leaching tubing for solution mining of salt cavern carbon and energy storage

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Petroleum Science 2024年第4期21卷 2703-2722页

作者： yin-Ping Li xin-bo Ge xi-Lin Shi Hong-Ling Ma State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071HubeiChina College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao266590ShandongChina State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and TechnologyQingdao266590ShandongChina University of Chinese Academy of Sciences Beijing100049China

Salt caverns are extensively utilized for storing various substances such as fossil energy,hydrogen,compressed air,nuclear waste,and industrial solid *** China,when the salt cavern is leached through single-well water solution mining with oil as a cushion,engineering challenges arise with the leaching tubing,leading to issues like damage and *** problems significantly hinder the progress of cavern construction and the control of cavern *** primary cause of this is the flowinduced vibration instability of leaching tubing within a confined space,which results in severe bending or damage to the *** study presents a model experimental investigation on the dynamic characteristics of leaching tubing using a self-developed liquid-solid coupling physical model experiment *** experiment utilizes a silicone-rubber pipe(SRP)and a polycarbonate pipe(PCP)to examine the effects of various factors on the dynamic stability of cantilevered pipes conveying *** factors include external space constraint,flexural rigidity,medium outside the pipe,overhanging length,and end *** experiments reveal four dynamic response phenomena:water hammer,static buckling,chaotic motion,and flutter *** study further demonstrates that the length of the external space constraint has a direct impact on the flutter critical flow velocity of the cantilevered pipe conveying ***,the flutter critical flow velocity is influenced by the end conditions and different external media.

关键词： Salt cavern storage Solution mining Leaching tubing Experimental investigation Flutter instability

(K_(0.5)Na_(0.5))Nb_(1-x)Ta_(x)O_(3)铁电性的第一性原理研究

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原子与分子物理学报 2025年第4期42卷 138-146页

作者：褚新建雷博程刘晨曦刘纪博新疆科技学院信息科学与工程学院库尔勒841000 新疆大学物理科学与技术学院新疆固体物理与器件重点实验室乌鲁木齐830046 西安工业大学光电工程学院西安710032

随着铅基陶瓷的大量使用,造成了严重的环境和健康问题,为了能够找寻替代铅基陶瓷的材料,人们开始了对无铅陶瓷材料的探索.(K_(0.5)Na_(0.5))Nbo_(3)材料由于其优异的铁电压电性能,成为了无铅陶瓷材料的代表,但是碱性组分在高温下的高挥... 详细信息

随着铅基陶瓷的大量使用,造成了严重的环境和健康问题,为了能够找寻替代铅基陶瓷的材料,人们开始了对无铅陶瓷材料的探索.(K_(0.5)Na_(0.5))Nbo_(3)材料由于其优异的铁电压电性能,成为了无铅陶瓷材料的代表,但是碱性组分在高温下的高挥发性使其应用范围受到了极大的限制.基于这样的考虑,本文基于密度泛函理论的第一性原理方法,探究了(K_(0.5)Na_(0.5))Nb_(1-x)TaxO_(3)(x=0.125,0.25,0.375,0.5,0.625,0.75,0.875,1)九种体系的铁电性能,结果表明:随着Ta浓度的增加,晶格常数发生了突变,由此猜测KNN材料随着Ta浓度的增加,发生了正交-单斜的相变;Ta的掺入能够降低KNN材料的烧结难度,且随着Ta浓度的增加,形成难度逐渐降低;掺杂体系中,Ta-4f轨道与Na-3p,K-4p以及O-2s轨道电子发生了杂化,使导带底Nb-4d与Na-3p电子的态密度峰向高能区移动,禁带宽度呈现增加的趋势;在分析KNN材料铁电性作用机理时发现KNN的铁电极化类型是离子位移型极化,且在[001]方向上不具有极化能力.分析掺杂后各个体系的极化强度,发现随着Ta浓度的增加,极化强度逐渐降低,但是在低浓度掺杂时极化有向上增加的趋势,这可能是体系在低浓存在着正交与单斜的准同型相界(Morphotropic phase boundary,MPB)导致的,由此可以判断,低浓度掺杂有利于提高KNN材料的铁电性能.

关键词：第一性原理钙钛矿结果 KNN 铁电性

Random forest-based prediction of decay modes and half-lives of superheavy nuclei

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Nuclear Science and Techniques 2023年第12期34卷 271-280页

作者： bo‑Shuai Cai Cen‑xi Yuan Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Information on the decay process of nuclides in the superheavy region is critical in investigating new elements beyond oganesson and the island of *** paper presents the application of a random forest algorithm to examine the competition among different decay modes in the superheavy region,includingα decay,β^(-)decay,β^(+)decay,electron capture and spontaneous *** observed half-lives and dominant decay mode are well *** dominant decay mode of 96.9%of the nuclei beyond ^(212) Po is correctly ***,α decay is predicted to be the dominant decay mode for isotopes in new elements Z=119-122,except for spontaneous fission in certain even–even elements owing to the increased Coulomb repulsion and odd–even *** predicted half-lives demonstrate the existence of a long-lived spontaneous fission island southwest of ^(298) Fl caused by the competition between the fission barrier and Coulomb repulsion.A better understanding of spontaneous fission,particularly beyond ^(286)Fl,is crucial in the search for new elements and the island of stability.

关键词： Decay mode Superheavy nuclide Random forest

Gas channeling control with an in-situ smart surfactant gel during water-alternating-CO_(2) enhanced oil recovery

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Petroleum Science 2023年第5期20卷 2835-2851页

作者： xin-Jie Luo Bing Wei Ke Gao bo Jing bo Huang Ping Guo Hong-Yao yin Yu-Jun Feng xi Zhang Polymer Research Institute State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065SichuanChina National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500SichuanChina National Key Laboratory of Offshore Oil Exploitation CNOOC Research Institute Ltd.Beijing 102209China

Undesirable gas channeling always occurs along the high-permeability layers in heterogeneous oil reservoirs during water-alternating-CO_(2)(WAG)flooding,and conventional polymer gels used for blocking the“channeling”paths usually suffer from either low injectivity or poor gelation ***,we for the first time developed an in-situ high-pressure CO_(2)-triggered gel system based on a smart surfactant,N-erucamidopropyl-N,N-dimethylamine(UC22AMPM),which was introduced into the aqueous slugs to control gas channeling inWAG *** water-like,low-viscosity UC22AMPM brine solution can be thickened by high-pressure CO_(2) owing to the formation of wormlike micelles(WLMs),as well as their growth and shear-induced structure buildup under shear *** thickening power can be further potentiated by the generation of denser WLMs resulting from either surfactant concentration augmentation or a certain range of heating,and can be impaired via pressurization above the critical pressure of CO_(2) because of its soaring solvent *** flooding tests using heterogeneous cores demonstrated that gas channeling was alleviated by plugging of high-capacity channels due to the in-situ gelation of UC22AMPM slugs upon their reaction with the pre-or post-injected CO_(2) slugs under shear flow,thereupon driving chase fluids into unrecovered low-permeability areas and producing an 8.0% higher oil recovery factor than the conventional WAG *** smart surfactant enabled high injectivity and satisfactory gelation control,attributable to low initial viscosity and the combined properties of one component and CO_(2)-triggered gelation,*** work could provide a guide towards designing gels for reducing CO_(2) spillover and reinforcing the CO_(2) sequestration effect during CO_(2) enhanced oil recovery processes.

关键词： CO_(2)flooding Enhanced oil recovery Gas channeling Water-alternating-CO_(2) Smart surfactant Gel

FTO Polymorphisms Are Associated with Obesity But Not with Diabetes in East Asian Populations:A Meta-analysis

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Biomedical and Environmental Sciences 2009年第6期22卷 449-457页

作者： bo xi JIE MI Graduate School Peking Union Medical College Beijing 100730 China Department of Epidemiology Capital Institute of Pediatrics Beijing 100020 China

Objective To clarify the contradictory findings in patients with obesity and type 2 diabetes by meta-analysis. Methods PubMed and Embase were searched for articles published up to March 2009. All studies on the association of FTO polymorphisms with obesity and type 2 diabetes were included. Pooled odds ratio was calculated using the model of fixed or random effects. Sensitivity analysis was performed to evaluate the stability of meta-analytic results. Results Meta-analysis suggested that rs9939609 A allele was more significantly associated with obesity risk than T allele （3 studies / 2 004 cases and 4 544 control subjects）： random effect odds ratio （OR）-1.28, 95%CI=1.05 and 1.55, P heterogeneity =0.05, I^2=66.6%. Similar results were observed in rs8050136 polymorphism （3 studies/2 404 cases and 5 713 control subjects）： fixed effect OR =1.25, 95%CI-1.13, 1.37, Pheterogeneity =0.12, 12=51.9%. However, no significant association was found between genetics and risk of type 2 diabetes after control of potential confounders （at least for BMI） either for rs9939609 （fixed effect OR=1.05, 95% CI 0.97,1.13） or for rs8050136 polymorphism （fixed effect OR -1.07, 95%CI： 0.99, 1.16）. Furthermore, the sensitivity analysis strengthened our confidence in validity of the association. Conclusion FTO polymorphisms are associated with obesity but not with type 2 diabetes in East Asian populations. Further large-scale studies are required to conclusively establish the association.

关键词： FTO: Polymorphism Obesity Type 2 diabetes Meta-analysis

Strength, strain capacity and toughness of five dual-phase pipeline steels

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Journal of Iron and Steel Research International 2021年第6期28卷 752-761页

作者： Yi Ren xian-bo Shi Zhen-guo Yang Yi-yin Shan Wei Ye Gui-xi Cai Ke Yang State Key Laboratory of Metal Material for Marine Equipment and Application Anshan 114009LiaoningChina CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Institute of Metal Research Chinese Academy of SciencesShenyang 110016LiaoningChina

The effect of microstructures on strength,strain capacity and low temperature toughness of a micro-alloyed pipeline steel was *** various dual-phase microstructures,namely,acicular ferrite and a small amount of(around 2 vol.%)polygonal ferrite(AF+PF),polygonal ferrite and bainite(PF+B),polygonal ferrite and martensite/austenite islands(PF+M/A),polygonal ferrite and martensite(PF+M)and elongated polygonal ferrite and martensite(ePF+M),have been *** results show that AF+PF microstructure has high yield strength and excellent low temperature toughness,whereas its yield ratio is the *** ferrite-based dual-phase steels,PF+B,PF+M/A and PF+M microstructures show better strain capacity and low temperature *** strain capacity and low temperature toughness of ePF+M microstructure are the worst due to its high *** relationship between microstructure,strength,strain capacity and toughness has been *** on the results,the optimum microstructure for a better combination of strength,strain capacity and toughness is suggested to be the one having appropriate polygonal ferrite as second phase in an acicular ferrite matrix.

关键词： Pipeline steel Dual-phase microstructure Strength Strain capacity Toughness

Partition method for improvement of piecewise linear model with full envelope covered

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航空动力学报 2016年第12期31卷 3042-3053页

作者： YANG Shu-bo WANG xi LONG Yi-fu LI Zhi-peng HU Zhong-zhi yin Kai ZHANG Rong School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Commercial Aircraft Engine Company Limited Aero Engine(Group)Corporation of China

Since ambient conditions vary in a wide range within the full flight envelope,the existing piecewise linear model(PLM),which is based on sea-level static condition with use of corrected parameters for other points in the flight envelope,cannot meet the accuracy for replacing the nonlinear *** obtain more accurate linear models,a method of partitioning the flight envelope over a grid of Mach number and altitude boxes was ***,a set of linear models for a given operating condition was selected by picking the nearest(Mach number,altitude)box in the flight *** the selected set of linear models,interpolating for power level based on a weighted sum of corrected rotor speeds can obtain a linear model with acceptable *** results of different points within the full flight envelope showed that the maximum error between nonlinear model and the existing PLM was more than 50%,while the maximum error between nonlinear model and the improved PLM was within 8%.It is concluded that the improved PLM performs accurately,especially under the non-standard *** addition,the improved PLM can satisfy the real-time requirement better than the existing PLM.

关键词： piecewise linear model partition full envelope parameter schedule turbofan engine