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垂直磁场中超导薄膜上的涡旋涨落

低温物理学报 1999年第4期21卷 66-69页

作者：徐力方金铎赵忠贤中国科学院低温技术实验中心中国科学院物理所超导国家重点实验室

本文用二维非中性库仑气体模型描述磁场中超导薄膜上的涡旋涨落，将中性库仑气体的自洽方程组推广到非中性模型，并求得其数值解．文中着重讨论了非中性模型电荷配对的渡越行为和再入现象

关键词：涡旋态混合态非中性方程组联立方程电荷密度电性超导膜超导薄膜垂直磁场

High-precision tip positioning composite feedforward control of linear colocated motion systems with Bi-Loop iterative feedforward tuning

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Science China Technological Sciences 2025年

作者： Junyu HU Yourui TAO Shanhu li xu HAN College of Mechanical and Vehicle Engineering Hunan University State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology

To enhance the tip positioning accuracy and robustness against disturbances of linear colocated motion systems, a novel composite feedforward (COMFF) control with Bi-Loop iterative feedforward tuning (IFFT) is proposed. The tip positioning error consists of the coupled tip residual vibration and linear motor tracking error. Given the influence of nonlinear friction and load flexibility, the topology of COMFF is designed as decoupled structures so that COMFF can suppress the tip residual vibration and compensate for the linear motor tracking error compatibly. Furthermore, Bi-Loop IFFT is built to improve the robustness of COMFF in high-precision motor tracking performance. In the state space of the linear motor tracking error based on the projection theorem, two loops are performed in parallel along the iteration direction. One is the P-type iteration loop that drives linear motor tracking errors to converge to the zero state. The other is the observation loop constructed by the recursive least square with forgetting factors to accelerate the P-type iteration loop. Driven by the P-type iteration loop with the aid of the observation loop, the proposed COMFF is integrated with fast convergence and high robustness when confronted with model disturbances. The effectiveness of the proposed COMFF combined with Bi-Loop IFFT is validated by experiments.

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Differential distribution of PINK1 and Parkin in the primate brain implies distinct roles

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Neural Regeneration Research 2025年第4期20卷 1124-1134页

作者： Yanting liu Wei Huang Jiayi Wen Xin Xiong Ting xu Qi Wang Xiusheng Chen Xianxian Zhao Shihua li Xiaojiang li Weili Yang Guangdong Key Laboratory of Non-human Primate Research Key Laboratory of CNS Regeneration(Ministry of Education)Guangdong-Hongkong-Macao CNS Regeneration Institute of Jinan UniversityJinan UniversityGuangzhouGuangdong ProvinceChina

The vast majority of in vitro studies have demonstrated that PINK1 phosphorylates Parkin to work together in mitophagy to protect against neuronal ***,it remains largely unclear how PINK1 and Parkin are expressed in mammalian *** has been difficult to address because of the intrinsically low levels of PINK1 and undetectable levels of phosphorylated Parkin in small *** this issue is critical for elucidating the in vivo roles of PINK1 and ***,we showed that the PINK1 kinase is selectively expressed as a truncated form(PINK1–55)in the primate *** the present study,we used multiple antibodies,including our recently developed monoclonal anti-PINK1,to validate the selective expression of PINK1 in the primate *** found that PINK1 was stably expressed in the monkey brain at postnatal and adulthood stages,which is consistent with the findings that depleting PINK1 can cause neuronal loss in developing and adult monkey ***1 was enriched in the membrane-bound fractionations,whereas Parkin was soluble with a distinguishable *** double staining experiments showed that PINK1 and Parkin did not colocalize under physiological conditions in cultured monkey astrocytes,though they did colocalize on mitochondria when the cells were exposed to mitochondrial *** findings suggest that PINK1 and Parkin may have distinct roles beyond their well-known function in mitophagy during mitochondrial damage.

关键词： neurodegeneration Parkin Parkinson’s disease PINK1 subcellular distribution

Effects of mesoscale gravity waves on sporadic E simulated by a one-dimensional dynamic model

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

作者： xu Zhou ZeZhong li XinAn Yue liBo liu Key Laboratory of Earth and Planetary Physics/Heilongjiang Mohe National Geophysical Observatory/Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences(CAS)Beijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China

In addition to being driven by tidal winds,the sporadic E(Es)layers are modulated by gravity waves(GWs),although the effects are not yet comprehensively *** this article,we discuss the effects of mesoscale GWs on the Es layers determined by using a newly developed model,MISE-1D(one-dimensional Model of Ionospheric Sporadic E),with low numerical dissipation and high *** by the wind fields resolved by the high-resolution version of the Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension(WACCM-X),the MISE-1D simulation revealed that GWs significantly influence the evolution of the Es layer above 100 km but have a very limited effect at lower *** effects of GWs are diverse and complex,generally including the generation of fluctuating wavelike structures on the Es layer with frequencies similar to those of the *** mesoscale GWs can also cause increases in the density of Es layers,or they can disperse or diffuse the Es layers and increase their *** addition,the presence of GWs is a key factor in sustaining the Es layers in some cases.

关键词： sporadic E ion tidal layer gravity waves numerical simulation

lightweight Al-Nb-Ti-V-Cr high entropy alloys with high hardness and enhanced mechanical properties via doping Co

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China Foundry 2025年

作者： fang-dong xu De-zhi Chen Rui-run Chen Bin Gan Jing-yue Yu National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Suzhou Laboratory

To develop high-hardness and high-strength lightweight high entropy alloys （LHEAs）,a series of CoxAlNbTiVCr alloys were *** phase constitution,distribution,and crystal structure of the Laves phase in alloys can be altered by adjusting the composition of HEAs,which in turn influences their mechanical *** Nb Ti VCr （x=0,0.5,1,1.5,and 2,atomic ratio percentage） LHEAs were designed and prepared to characterize the microstructure and tailor the mechanical *** introduction of Co changes the microstructure of LHEAs from a single B2 structure to a mixture dendrite structure,which consists of B2 phase,C14 and C15 Laves *** the C14 and C15 Laves phases exhibit coupled *** parameters including mixing enthalpy (ΔHmix),valence electron concentration （VEC）,atomic radius size （δ）,mixing entropy （ΔS）,and electronegativity difference （Δχ） are used to predict the formation of B2 and Laves phase in *** the Co content increases from 0 to 1.5at.%,Laves phase volume fraction gradually increases,which leads to an enhancement in the compressive strength from 1,520.8 MPa to 1,844.4 ***1.5Al Nb Ti VCr alloy exhibits the maximum Vickers hardness of 699.4 *** improvement of mechanical properties mainly originates from solid solution strengthening and second phase strengthening.

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富康轿车保险杠PP改性专用料研究

中国塑料 2001年第1期15卷 27-30页

作者：赵文聘黄平徐丽芳南剑凌程丽珍鞍山市龙马塑料有限公司辽宁鞍山114031 武汉塑料集团塑料件分公司湖北武汉430012

介绍了富康轿车保险杠聚丙烯 (PP)改性专用料的研制 ,采用双螺杆挤出共混工艺 ,分析了各种改性剂对共混材料的性能影响。

关键词：聚丙烯保险杠增韧剂共混富康轿车

Calibration of the Solar X-ray Detector on-board the Macao Science Satellite-1B for Soft X-ray Detection

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Science China Earth Sciences 2025年第1期68卷 11-26页

作者： Man-Hei NG Xiaoping ZHANG Jianwu CHEN Yongqiang SHI Fuchang ZUO Wenxi PENG Weichun FU liansheng li Pengwei LUO Chi-Long TANG Guozheng ZHANG Zhiwu MEI li WANG Cunhui li Jiaming OU Yanyan xu State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology China National Space Administration (CNSA) Macau Center for Space Exploration and Science Space Optoelectronic Measurement and Perception Laboratory Beijing Institute of Control Engineering Institute of High Energy Physics Chinese Academy of Sciences Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of Physics

The Solar X-ray Detector(SXD) on-board the Macao Science Satellite-1B(MSS-1B) was successfully launched via the Chinese Long March-2C rocket on 21 May 2023, and commenced operations in early June of the same year. The MSS-1B/Soft X-ray Detection Units(SXDUs) employ two silicon drift detectors(SDDs), providing a wide range of energy spectra spanning from 0.7 to 24 keV. Notably, the SXDUs deliver a high-resolution capability of 0.14 keV@5.9 keV and operate with a time cadence of 1 second. Here, we perform thorough calibrations of the MSS-1B/SXDUs, employing a combination of ground experiments and simulations. In addition, quantitative analysis comparing the flux measurements obtained by the MSS-1B/SXDUs to the data collected by the Geostationary Operational Environmental Satellite(GOES), provides compelling evidence of their consistency. Furthermore, the preliminary spectral analysis results showcase the robustness and expected performance of the MSS-1B/SXDUs, unlocking their potential for facilitating the study of dynamic evolution of solar flares. Moreover, the innovative MSS-1B/Solar X-ray Detector facilitates concurrent observations of solar soft and hard X-rays, thereby making valuable contributions to the advancements in solar research.

关键词： Macao Science Satellite-1B (MSS-1B) Calibration Solar X-Ray Detector Spectrometer Soft X-rays Solar flares Solar abundances

“一带一路”战略下会展企业国际竞争力提升策略研究

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西安文理学院学报（社会科学版） 2016年第6期19卷 56-62页

作者：许丽芳福建对外经济贸易职业技术学院外语系

“一带一路”战略的实施为会展企业“走出去”创造了历史机遇，是会展企业培育国际竞争力的新起点。在回顾企业国际竞争力相关文献的基础上，以文化力、学习力、创新力和营销力为核心能力要素构建会展企业国际竞争力模型，分析会展企业... 详细信息

“一带一路”战略的实施为会展企业“走出去”创造了历史机遇，是会展企业培育国际竞争力的新起点。在回顾企业国际竞争力相关文献的基础上，以文化力、学习力、创新力和营销力为核心能力要素构建会展企业国际竞争力模型，分析会展企业国际竞争力现状和“一带一路”战略为会展企业发展创造的条件，以“一带一路”战略为契机提出通过建设以人为本的企业文化、创建学习型组织、创新会展产品和服务、建立以品牌为中心的营销模式以及政府对会展活动的管理等方式提升会展企业的国际竞争力。

关键词： “一带一路”战略会展企业能力系统国际竞争力

“一带一路”战略下会展企业国际竞争力提升策略

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内江师范学院学报 2016年第10期31卷 63-69页

作者：许丽芳福建对外经济贸易职业技术学院外语系福建福州350016

"一带一路"战略的实施为会展企业"走出去"创造了历史机遇,是会展企业培育国际竞争力的新起点.在回顾企业国际竞争力相关文献基础上,以文化力、学习力、创新力和营销力为核心能力要素构建会展企业国际竞争力模型,分析会展企业国际竞争力... 详细信息

"一带一路"战略的实施为会展企业"走出去"创造了历史机遇,是会展企业培育国际竞争力的新起点.在回顾企业国际竞争力相关文献基础上,以文化力、学习力、创新力和营销力为核心能力要素构建会展企业国际竞争力模型,分析会展企业国际竞争力现状和"一带一路"战略为会展企业发展创造的条件,以"一带一路"战略为契机提出通过建设以人为本的企业文化、创建学习型组织、创新会展产品和服务、建立以品牌为中心的营销模式以及政府对会展活动的管理等方式提升会展企业的国际竞争力.

关键词： “一带一路”倡议会展企业能力系统国际竞争力