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A joint absorbing boundary for the multiple-relaxation-time lattice Boltzmann method in seismic acoustic wavefield modeling

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Petroleum Science 2023年第4期20卷 2113-2126页

作者： Chun-Tao Jiang Hui Zhou Mu-Ming Xia Han-Ming Chen jin-xuan tang State Key Laboratory of Petroleum Resources and Prospecting CNPC Key Lab of Geophysical ExplorationChina University of PetroleumBeijing102249China CAS Engineering Laboratory for Deep Resources Equipment and Technology Institute of Geology and Geophysicsand Innovation Academy for Earth ScienceChinese Academy of SciencesBeijing100029China Research Institute of Petroleum Exploration&Development PetroChinaBeijing100083China

Conventional seismic wave forward simulation generally uses mathematical means to solve the macroscopic wave equation,and then obtains the corresponding seismic ***,when the subsurface structure is finely constructed and the continuity of media is poor,this strategy is difficult to meet the requirements of accurate wavefield *** paper uses the multiple-relaxation-time lattice Boltzmann method(MRT-LBM)to conduct the seismic acoustic wavefield simulation and verify its computational *** cope with the problem of severe reflections at the truncated boundaries,we analogize the viscous absorbing boundary and perfectly matched layer(PML)absorbing boundary based on the single-relaxation-time lattice Boltzmann(SRT-LB)equation to the MRT-LB equation,and further,propose a joint absorbing boundary through comparative *** give the specific forms of the modified MRT-LB equation loaded with the joint absorbing boundary in the two-dimensional(2D)and three-dimensional(3D)cases,***,we verify the effects of this absorbing boundary scheme on a 2D homogeneous model,2D modified British Petroleum(BP)gas-cloud model,and 3D homogeneous model,*** results reveal that by comparing with the viscous absorbing boundary and PML absorbing boundary,the joint absorbing boundary has the best absorption performance,although it is a little bit ***,this joint absorbing boundary better solves the problem of truncated boundary reflections of MRT-LBM in simulating seismic acoustic wavefields,which is pivotal to its wide application in the field of exploration seismology.

关键词： Multiple-relaxation-time Lattice Boltzmann method Seismic acoustic wavefield simulation Truncated Boundary reflection Joint absorbing boundary

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Wafer‑Scale Vertical 1D GaN Nanorods/2D MoS_(2)/PEDOT:PSS for Piezophototronic Effect‑Enhanced Self‑Powered Flexible Photodetectors

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Nano-Micro Letters 2025年第3期17卷 102-116页

作者： Xin tang Hongsheng Jiang Zhengliang Lin xuan Wang Wenliang Wang Guoqiang Li State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Department of Electronic Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible ***,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered ***,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays *** as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II ***,the strain-tunable photodetection performances of device have been ***,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible *** work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors

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Cell polarization in ischemic stroke: molecular mechanisms and advances

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Neural Regeneration Research 2025年第3期20卷 632-645页

作者： Yuanwei Li Xiaoxiao Xu xuan Wu Jiarui Li Shiling Chen Danyang Chen Gaigai Li Zhouping tang Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Ischemic stroke is a cerebrovascular disease associated with high mortality and disability rates. Since the inflammation and immune response play a central role in driving ischemic damage, it becomes essential to modulate excessive inflammatory reactions to promote cell survival and facilitate tissue repair around the injury site. Various cell types are involved in the inflammatory response, including microglia, astrocytes, and neutrophils, each exhibiting distinct phenotypic profiles upon stimulation. They display either proinflammatory or anti-inflammatory states, a phenomenon known as ‘cell polarization.’ There are two cell polarization therapy strategies. The first involves inducing cells into a neuroprotective phenotype in vitro, then reintroducing them autologously. The second approach utilizes small molecular substances to directly affect cells in vivo. In this review, we elucidate the polarization dynamics of the three reactive cell populations(microglia, astrocytes, and neutrophils) in the context of ischemic stroke, and provide a comprehensive summary of the molecular mechanisms involved in their phenotypic switching. By unraveling the complexity of cell polarization, we hope to offer insights for future research on neuroinflammation and novel therapeutic strategies for ischemic stroke.

关键词： astrocyte polarization immune regulation inflammation ischemic injury microglia polarization neutrophil polarization signaling pathways stroke

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Vector meson's spin alignments in high energy reactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 5-20页

作者： jin-Hui Chen Zuo-tang Liang Yu-Gang Ma Xin-Li Sheng Qun Wang Key Laboratory of Nuclear Physics and Ion-beam Application (MoE) Institute of Modern PhysicsFudan University Institute of Frontier and Interdisciplinary Science Key Laboratory of Particle Physics and Particle Irradiation (MOE)Shandong University INFN-Firenze Department of Modern Physics University of Science and Technology of China School of Mechanics and Physics Anhui University of Science and Technology

The global spin alignment of vector mesons has been observed by the STAR collaboration at the Relativistic Heavy Ion Collider （RHIC） at Brookhaven National Laboratory （BNL）.It provides a unique opportunity to probe the correlation between the polarized quark and antiquark in the strongly coupled quark-gluon plasma （sQGP） produced in relativistic heavy ion collisions,opening a new window to explore the properties of s *** addition,spin alignments of vector mesons have also been observed in other high-energy particle collisions such as e+e-annihilations at high energies where hadron production is dominated by quark fragmentation *** results obtained are quite different from those obtained in heavy ion collisions where quark coalescence/combination mechanism dominates suggesting strong dependence on hadronization *** comprehensive studies in different hadronization processes are *** this article,we present a brief review of theoretical and experimental advances in the study of vector meson’s spin alignments in a variety of high-energy particle collisions,with emphasis on hadronization mechanisms.

关键词： vector meson spin alignment global polarization relativistic heavy ion collisions fragmentation

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产出导向下师范教育课程的逆向审视与创新发展——基于S市新入职教师的调查

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东北师大学报（哲学社会科学版） 2025年第1期 81-90页

作者：杨进唐燕东北师范大学教育学部吉林长春130024

当下我国师范教育改革进入了以产出导向为改革理念的新阶段,即以师范生的学习结果和能力表现来评价师范教育培养质量。本研究突破在师范教育阶段内讨论师范生水平的局限,采用问卷调查和访谈调查法,以毕业后任教1个月的新教师为研究对象... 详细信息

当下我国师范教育改革进入了以产出导向为改革理念的新阶段,即以师范生的学习结果和能力表现来评价师范教育培养质量。本研究突破在师范教育阶段内讨论师范生水平的局限,采用问卷调查和访谈调查法,以毕业后任教1个月的新教师为研究对象,通过新教师自评和老教师他评的对比,呈现师范毕业生的职业能力水平与存在的主要问题。再结合新教师在真实教育情境中的适应性和对在学阶段所接受的师范教育课程的满意度评价,逆向审视师范教育课程存在的问题。以“服务终端”的理念进行课程设置、嵌入前沿属性优化课程教学、数字技术支持“具身拟态”提高实训效果、创设“人人交往”机会消解人机互动带来的沟通弱化等,以推动师范教育的课程改革。

关键词：师范教育课程产出导向教育新入职教师

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Distinct MLT asymmetry of auroral kilometric radiation observed by the FAST satellite

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Earth and Planetary Physics 2025年第1期9卷 188-193页

作者： JiaWen tang Sai Zhang FuLiang Xiao HongMing Yang Si Liu YiHua He Chang Yang YuYue jin ZhouKun Deng Ping Li Archie James Johnston School of Physics and Electronic Sciences Changsha University of Science and TechnologyChangsha 410114China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments Changsha University of Science and TechnologyChangsha 410114China School of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha 410114China

Auroral Kilometric Radiation (AKR) is a common radio emission,which can contribute to the magnetosphere-ionosphereatmosphere co u *** emissions have been observed in all magnetic planet magnetospheres of the solar *** this study,using observations from the FAST satellite from 30 August 1996 to 9 September 2001,the distribution of AKR in altitude=500-4500 km and invariant latitude (|ILAT|)=60°-80°has been analyzed.63045 AKR samples have been identified with~48%(52%) samples on the dayside (nightside).Of considerable interest,there is a distinct MLT asymmetry with the high occurrence rate in MLT=05-08 and 18-22(02-05 and 12-17) in the northern (southern) *** distinct MLT asymmetry is associated with the direction of Bxof the interplaneta ry magnetic *** addition,the occurrence rate on the nightside clearly increases as the AE^(*) index *** study further enriches the information and understanding of AKR in the magnetosphere as well as other similar radio emissions.

关键词： asymmetry auroral kilometric radiation interplanetary magnetic field

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SnO高压结构稳定性和电学性能研究

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光谱学与光谱分析 2025年第1期45卷 82-87页

作者：刘涛黄宇轩高金金王世霞上海理工大学材料与化学学院上海200093

近年来氧化亚锡(SnO)在光、电等方面的应用日益广泛,为了拓宽SnO的应用范围,采用拉曼光谱原位测试和第一性原理计算对高压条件下SnO的结构性能和电子性质进行研究。SnO表征结果:扫描电子显微镜结果显示,所选取SnO样品为具有横向尺寸的... 详细信息

近年来氧化亚锡(SnO)在光、电等方面的应用日益广泛,为了拓宽SnO的应用范围,采用拉曼光谱原位测试和第一性原理计算对高压条件下SnO的结构性能和电子性质进行研究。SnO表征结果:扫描电子显微镜结果显示,所选取SnO样品为具有横向尺寸的片状堆叠,整体呈花状;X射线衍射图谱表明,SnO样品在常温常压下晶体结构为四方晶系结构(空间群P4/nmm)。采用Mao-Bell型金刚石压腔结合原位拉曼光谱探究了SnO样品在高压下的结构性能变化,结果显示:SnO在常压有四种拉曼振动模式(A_(1g)、B_(1g)、E_(1g)和E_(2g)),分别位于211、350、113和460 cm^(-1)波数附近,其中113和211 cm^(-1)为SnO拉曼特征峰。随SnO样品体系加压至12.5 GPa,压力使Sn分子间和原子间距不断减小,导致Sn-O键长缩短,当原子发生伸缩振动时,缩短的键长使得键能增大,因此活性拉曼振动模(E_(1g)和A_(1g))均向高频方向移动;随着体系压力的继续增大,晶格发生畸变进而使得非弹性散射强度降低,峰型宽化;当加压至8 GPa时,125和216 cm^(-1)附近振动模峰急剧减小;加压至10 GPa时两个特征峰完全消失,在非静水压环境下8~10 GPa时该物质发生了非晶化;当体系加压至12.5 GPa时,谱图中仍未出现新峰,表明高压下非晶化状态稳定。随后体系进行卸压,卸压至3 GPa后SnO的E_(1g)和A_(1g)模重新出现表明样品恢复低压下的晶体结构,卸至常压特征峰强度明显分别为110和209 cm^(-1)处与加压前吻合,证明了SnO高压相变行为具有可逆性。为进一步了解压力对SnO电学性能影响,使用第一性原理方法计算了SnO在常压和实验非晶化压力(8 GPa)下的电子性质,通过非晶化前后SnO的带隙宽度变化,探究压力对SnO导电性能的影响。结果显示,在常压下SnO为具有0.43 eV带隙的间接带隙半导体,在费米能级附近态密度没有发生重叠,8 GPa时SnO显示金属性质,由于SnO O-p、Sn-s和Sn-p轨道的态密度在费米能级处重叠,导致带隙的闭合,材料发生金属化。研究结果表明SnO高压下可能产生非晶化及压力所导致的非晶化行为可逆,同时高压导致SnO发生半导体到金属的转变,拓展了SnO高压结构和电学性质的探究,为SnO高压下的应用提供进一步帮助。

关键词： SnO 拉曼光谱金刚石压腔第一性原理电子性质

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智能制造与专精特新双认证政策的协同效应——基于供应链企业创新视角

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山西财经大学学报 2025年第1期47卷 98-114页

作者：陈金勇樊荣汤湘希湖北大学商学院中南财经政法大学会计学院

通过构建双认证政策赋能企业创新的分析框架，使用固定效应泊松模型，探究智能制造与专精特新政策协同对企业创新的影响及作用机制。结果发现：相较于单认证企业，双认证政策对企业创新的协同激励效应更强，且在国有企业和高科技行业中... 详细信息

通过构建双认证政策赋能企业创新的分析框架，使用固定效应泊松模型，探究智能制造与专精特新政策协同对企业创新的影响及作用机制。结果发现：相较于单认证企业，双认证政策对企业创新的协同激励效应更强，且在国有企业和高科技行业中表现得更为显著；相较于非认证企业，单认证政策对企业创新的直接激励效应更强，呈现出明显的梯度效应；双认证政策通过增加政府补助和提高客户集中度，促进企业创新；智能制造政策的创新激励效应高于专精特新政策。

关键词：智能制造专精特新协同效应供应链创新挤出效应政府补贴客户集中度策略性创新

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人脐带间充质干细胞条件培养基及外泌体对肝癌细胞增殖、迁移、侵袭和凋亡的影响

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中国组织工程研究 2025年第7期29卷 1350-1355页

作者：金凯唐婷李美乐谢裕安广西中医药大学研究生院广西壮族自治区南宁市530002 广西壮族自治区妇幼保健院广西壮族自治区南宁市530002 广西出生缺陷及干细胞生物样本库重点实验室广西壮族自治区南宁市530002

背景:间充质干细胞可通过分泌含细胞因子、生长因子和外泌体的细胞外囊泡调节肿瘤微环境,对肿瘤细胞生物学行为进行精准调控。目的:研究人脐带间充质干细胞条件培养基及外泌体对肝癌细胞生物学特性的影响。方法:收集人脐带间充质干细胞... 详细信息

背景:间充质干细胞可通过分泌含细胞因子、生长因子和外泌体的细胞外囊泡调节肿瘤微环境,对肿瘤细胞生物学行为进行精准调控。目的:研究人脐带间充质干细胞条件培养基及外泌体对肝癌细胞生物学特性的影响。方法:收集人脐带间充质干细胞培养上清,通过高速离心并过滤获得人脐带间充质干细胞条件培养基;收集人脐带间充质干细胞培养上清,通过超高速梯度离心法提取人脐带间充质干细胞外泌体。使用PKH26标记人脐带间充质干细胞外泌体,与肝癌细胞MHCC97-H共培养,荧光显微镜观察MHCC97-H细胞摄取外泌体情况。通过CCK-8增殖实验、Transwell迁移和侵袭实验以及流式凋亡实验评估人脐带间充质干细胞条件培养基、人脐带间充质干细胞外泌体对肝癌细胞生物学功能的影响。结果与结论:(1)人脐带间充质干细胞外泌体可被MHCC97-H细胞摄取且主要分布于细胞质中;(2)人脐带间充质干细胞条件培养基处理后,MHCC97-H细胞的增殖、迁移和侵袭能力显著增强(P<0.001,P<0.05,P<0.01),凋亡能力显著下降(P<0.001);而人脐带间充质干细胞外泌体处理后,MHCC97-H细胞的增殖能力下降(P<0.001),迁移、侵袭及凋亡能力显著增强(P<0.001);(3)结果表明,人脐带间充质干细胞条件培养基具有促进MHCC97-H细胞增殖、迁移、侵袭和抑制凋亡的能力;而人脐带间充质干细胞外泌体则具有促进MHCC97-H细胞迁移、侵袭及凋亡和抑制增殖的能力。

关键词：肝癌人脐带间充质干细胞外泌体条件培养基增殖迁移侵袭凋亡

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A Levenberg–Marquardt Method for Solving the Tensor Split Feasibility Problem

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Journal of the Operations Research Society of China 2021年第4期9卷 797-817页

作者： Yu-xuan jin jin-Ling Zhao School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China

This paper considers the tensor split feasibility *** C and Q be non-empty closed convex set and A be a semi-symmetric *** tensor split feasibility problem is to find x∈C such that Axm−1∈*** we simply take this problem as a special case of the nonlinear split feasibility problem,then we can directly get a projection method to solve ***,applying this kind of projection method to solve the tensor split feasibility problem is not so *** we propose a Levenberg–Marquardt method to achieve higher *** analyses are conducted,and some preliminary numerical results show that the Levenberg–Marquardt method has advantage over the common projection method.

关键词： Tensor Split feasibility problem Semi-symmetric Projection Levenberg-Marquardt method

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