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用改进的Wilson-θ法分析流固耦合表面波的影响

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四川大学学报（工程科学版） 2002年第4期34卷 19-21,25页

作者：晏启祥刘浩吾饶俊勇四川大学水电学院四川成都610065 西南电力设计院四川成都610021

从流固耦合系统的位移和压强型有限元出发 ,利用伽辽金法获得了表面波影响矩阵。在时域内对离散方程组用改进Wilson -θ法 ,按子结构迭代求解。算例表明 :水深是决定表面波影响大小的主要因素之一 ;表面波的影响范围主要在库水表面附近 ... 详细信息

从流固耦合系统的位移和压强型有限元出发 ,利用伽辽金法获得了表面波影响矩阵。在时域内对离散方程组用改进Wilson -θ法 ,按子结构迭代求解。算例表明 :水深是决定表面波影响大小的主要因素之一 ;表面波的影响范围主要在库水表面附近 ,同时也表明 ,改进的Wilson

关键词：流固耦合时域分析 Wilson-θ法表面波水库

Study of thermal decoherence of harmonic oscillators

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原子与分子物理学报 2025年第5期42卷 108-114页

作者： LI Jian ZHOU Gao-Liang YAN Zheng-Xin liu Wei WANG Zhao-qi College of Science Xi’an University of Science and TechnologyXi’an 710054China

The thermal decoherence of harmonic oscillators is investigated *** quantum system presented here is a one-dimensional oscillator with angular frequency,which is surrounded by a thermal bath of environmental *** are various environmental oscillators with different angular frequency(below an ultraviolet cutoff).At the beginning,the quantum system is a pure state and the environmental oscillators are in thermodynamic equilibrium with *** a period,the system-environment interactions inspire significant decoherence of the quantum *** decoherence is displayed by explicit calculations of the purity and von Neumann entropy of the quantum *** is worth noting that the decoherence could be significant even in the weak coupling and low temperature case due to the large amount of environmental degrees of *** the decoherence process is inspired between the quantum system and an ordinary thermal environment here,the thermal decoherence result is quite general.

关键词： Quantum decoherence Grand canonical ensemble Oscillators

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一种新型压配式腰椎椎间融合器的机械性能

中国组织工程研究 2025年第21期29卷 4492-4498页

作者：李世文于长水刘启王智博刘禹良祁全哈尔滨医科大学附属第一医院黑龙江省哈尔滨市150000

背景:行经皮微创椎间孔腰椎椎间融合置入椎间融合器时,由于入路操作范围狭窄,有牵拉神经根损伤或置入融合器位置不良等风险,为了解决以上问题作者课题组发明了一种新型机械结构可变形压配式cage(Press-fit cage,YP-cage)。目的:对新型... 详细信息

背景:行经皮微创椎间孔腰椎椎间融合置入椎间融合器时,由于入路操作范围狭窄,有牵拉神经根损伤或置入融合器位置不良等风险,为了解决以上问题作者课题组发明了一种新型机械结构可变形压配式cage(Press-fit cage,YP-cage)。目的:对新型腰椎融合器YP-cage的机械强度特性进行初步评估。方法:对不同尺寸9,11,13 mm高度的新型YP-cage(n=9)和聚醚醚酮-cage(n=9)进行了静态轴向压缩实验和静态轴向扭转实验,分别采集力-位移曲线计算屈服位移及载荷、极限载荷位移及刚度,屈服角位移及扭矩、极限载荷角位移扭矩及刚度,并进行对比分析。结果与结论:(1)在静态轴向压缩测试中,YP-cage在3组测试中(9,11,13 mm),其刚度、屈服载荷、极限位移和载荷极限方面均优于聚醚醚酮-cage(P <0.01),但YP-cage的屈服位移小于聚醚醚酮-cage(P <0.05);(2)在静态扭转测试中,除了9 mm组的YP-cage和聚醚醚酮-cage在极限扭转角度上差异无显著性意义,YP-cage在屈服扭矩、屈服扭转角度及极限扭矩均小于聚醚醚酮-cage(P <0.01),而YP-cage扭转刚度在9 mm组和11 mm组大于聚醚醚酮-ccage(P <0.01);(3)结果表明新型压配式机械结构椎间融合器相较于聚醚醚酮材质cage具有更高的抗压强度,但抗扭强度不如聚醚醚酮-cage。

关键词：椎间融合装置经孔椎体间融合术脊柱融合机械性能物理性质

Jet-dominated quiescent state in black hole X-ray binaries: the cases of A0620–00 and XTE J1118+480

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Research in Astronomy and Astrophysics 2016年第4期16卷 79-86页

作者： qi-xiang Yang Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China

The radiative mechanism of black hole X-ray transients （BHXTs） in their quiescent states （defined as the 2-10 keV X-ray luminosity ≤ 10^34 erg s-1） remains unclear. In this work, we investigate the quasi-simultaneous quiescent state spectrum （including radio, infrared, optical, ultraviolet and X-ray） of two BHXTs, A0620-00 and XTE J1118＋480. We find that these two sources can be well described by a coupled accretion - jet model. More specifically, most of the emission （radio up to infrared, and the X-ray waveband） comes from the collimated relativistic jet. Emission from hot accretion flow is totally insignificant, and it can only be observed in mid-infrared （the synchrotron peak）. Emission from the outer cold disk is only evident in the UV band. These results are consistent with our previous investigation on the quiescent state of V404 Cyg and confirm that the quiescent state is jet-dominated.

关键词： accretion accretion disks -- black hole physics -- X-rays: binaries -- stars: jets -- stars:individual (A0620-00 XTE J1118+480)

Realization of Perfect Teleportation with W-States in Cavity QED

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Communications in Theoretical Physics 2008年第3期49卷 617-620页

作者： HE Juan YE liu MA Chi liu qi NI Zhi-xiang School of Physics ＆ Material Science Anhui University Hefei 230039 China Department of Physics Fuyang Normal College Fuyang 230041 China

We put forward an experimentally feasible protocol for realizing a perfect teleportation by using a class of W-state in QED. The simple way of generating the entangled channel and distinguishing the measurement bases is the distinct feature of our scheme. In addition, the probability of teleportation is up to 100%. The scheme can be implemented by the present cavity QED techniques.

关键词： teleportation W state cavity QED

Comprehensive bibliometric analysis of pharmacotherapy for bipolar disorders:Present trends and future directions

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World Journal of Psychiatry 2025年第1期15卷 153-167页

作者： Bo-Fan Chen Li liu Fang-Zhen Lin Hai-Min Zeng Hai-qiang Huang Chun-Fang Zhang Cong-Cong liu xiang Chen Jie Peng Yun-Fa Wang Zhi-Lin Wang Bin Chen De-Le liu Yun liu Zheng-Zheng Li Xin-Xing Zeng The Second Affiliated Hospital Jiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina The Second Clinical Medical College Jiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Rehabilitation Medicine The Second Affiliated HospitalJiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina Jiangxi Provincial People’s Hospital The First Affiliated Hospital of Nanchang Medical CollegeNanchang 330006Jiangxi ProvinceChina Department of Psychiatry Jiangxi Mental HospitalHospital of Nanchang UniversityNanchang UniversityNanchang 330029Jiangxi ProvinceChina

BACKGROUND Bipolar disorder(BD)is a severe mental illness characterized by significant mood *** drug treatment modalities are crucial for managing *** To analyze the current status and future trends of global research on BD drug treatment over the last *** The Web of Science Core Collection database spanning from 2015 to 2024 was utilized to retrieve literature related to BD drug treatment.A total of 2624 articles were *** visualization and analysis were conducted using CiteSpace,VOSviewer,Pajek,Scimago Graphica,and R-studio bibliometrix to identify RESULTS The United States,China,and the United Kingdom have made the most significant contributions to research on BD drug treatment and formed notable research collaboration *** University of Pittsburgh,Massachusetts General Hospital,and the University of Michigan have been identified as the major research institutions in this *** Journal of Affective Disorders is the most influential journal.A keyword analysis revealed research hotspots related to clinical symptoms,drug efficacy,and genetic mechanisms.A citation analysis identified the management guidelines published by Yatham et al in 2018 as the most cited *** This study provides a detailed overview of the field of BD drug treatment,highlighting key contributors,research hotspots,and future *** study findings can be employed as a reference for future research and policymaking,which may enable further development and optimization of BD pharmacotherapy.

关键词： Bipolar disorder Drug treatment Bibliometric analysis Visualization Mental disorder

A new species of Discostella guiyangensis ***.(Bacillariophyta,Stephanodiscales)from Guiyang,China:morphology and phylogeny

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Journal of Oceanology and Limnology 2024年第4期42卷 1312-1324页

作者： Yandan xiang Fangru NAN Xudong liu Shulian XIE John Patrick KOCIOLEK qi liu School of Life Science Shanxi UniversityTaiyuan 030006China Department of Ecology and Evolutionary Biology and Museum of Natural History University of ColoradoBoulder CO 80309USA

We describe a new species of Discostella from Guiyang based on light and scanning electron microscopic observations,as well as molecular *** species is morphologically distinguished from other species by a relatively smooth and slightly recessed central area with marginal striae of unequal lengths forked near the *** fultoportulae and a single rimoportula are situated between every two costae or on the *** morphological characters and the concatenated data of rbc L and SSU rDNA indicate that Discostella guiyangensis is a unique and new *** to divergence time estimation analysis,Discostella guiyangensis is the oldest species among the Discostella species sequenced *** addition,we complement molecular data of Discostella asterocostata and Discostella stelligera.

关键词： Discostella morphology molecular analysis divergence time estimation new species

L-Lysine/imidazole-catalyzed Multicomponent Cascade Reaction： Facile Synthesis of C5-substituted 3-Methylcyclohex-2-enones

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Chinese Journal of Chemistry 2013年第8期31卷 997-1002页

作者： Ziwei xiang Zhiqiang liu Yiru Liang qi Wu Xianfu Lin Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 China

A facile and simple route for the direct preparation of substituted 3-methylcyclohex-2-enone via Aldol- Robinson cascade reaction of aldehydes and acetones catalyzed by the new catalytic system of L-lysine/imidazole in n-heptane with 0.5% water was reported. A variety of substrates can participate in the process efficiently. The merits of this method included inexpensive and easily available starting materials and catalyst, the good yield of products and the straightforward work-up.

关键词： L-lysine cascade reactions imidazole cyclohexanone-2-ene aldehydes

Evolution of the Lagrangian drift and vortex added-mass of a growing vortex ring

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Journal of Hydrodynamics 2021年第4期33卷 725-735页

作者： Shu-jia Lin Yang xiang Zhuo-qi Li Fu-xin Wang Hong liu School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai200240China

The vortex-based propulsive systems’ enhanced performance greatly contributes to the vortex added-mass effect, which was initially developed to explain the added drag when a solid body accelerates in fluids. However, the solution of the instantaneous vortex added-mass coefficient is still remaining a question because vortices always do not have a stable geometric shape like solid bodies. In this paper, the formation of a canonical vortex ring is performed to investigate the nature of vortex added-mass and explore a solution for estimating the vortex added-mass coefficient. The vortex ring is generated by a piston-cylinder apparatus, and the time-dependent flow fields are recorded by particle image velocimetry technique. The ridges of finite-time Lyapunov exponent are applied to identify the Lagrangian boundary of the vortex ring. It is found that a part of the ambient fluids is entrained by the vortex ring when it propagates downstream, resulting in the growth of the vortex ring. Besides, a significant drift of the ambient fluid is observed to bypass the Lagrangian boundary of the vortex ring and reveals the nature of the vortex added-mass. Thus, the added-mass coefficient of the vortex is redefined as the ratio of the volume of the Lagrangian drift fluids in finite time interval step to the vortex volume at that instant. By referring to McPhaden’s method to estimate the added-mass of a solid body, a method based on the multiple material lines with relative-timestep is developed to estimate the volume of Lagrangian drift fluids induced by the vortex added-mass. Then, an empirical criterion for determining the material line number and the finite time interval step is suggested for the vortex ring flow, and the eventual vortex added-mass coefficient calculated by the volume of Lagrangian drift fluids is found to well agree with the results of Brennen. Moreover, the method based on multiple material lines for calculating Lagrangian drift fluids’ volume suggests a poten

关键词： Added-mass Lagrangian coherent structure(LCS) finite-time Lyapunov exponent(FTLE)