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Inconsistent effect of dynamic load waveform on macro-and micro-scale responses of ballast bed characterized in individual cycle:a numerical study

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Railway Engineering Science 2023年第4期31卷 370-380页

作者： Longlong Fu Yuexiao Zheng yongjia qiu Shunhua Zhou Key Laboratory of Road and Traffic Engineering of the Ministry of Education Tongji UniversityShanghai 201804China Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety Tongji UniversityShanghai 201804China Municipal Public Engineering Design Institute Shanghai Urban Construction Municipal Engineering(Group)Co.LtdShanghai 200065China

Cyclic load is widely adopted in laboratory to simulate the effect of train load on ballast *** effectiveness of such load equivalence is usually testified by having similar results of key concerns of ballast bed,such as deformation or stiffness,while the consistency of particle scale characteristics under two loading patterns is rarely examined,which is insufficient to well-understand and use the load *** this study,a previous laboratory model test of ballast bed under cyclic load is rebuilt using 3D discrete element method(DEM),which is validated by dynamic responses monitored by high-resolution ***,train load having the same magnitude and amplitude as the cyclic load is applied in the numerical model to obtain the statistical characteristics of inter-particle contact force and particle movements in ballast *** results show that particle scale responses under two loading patterns could have quite deviation,even when macro-scale responses of ballast bed under two loading patterns are very *** inconsistency indicates that the application scale of the DEM model should not exceed the validation ***,it is important to examine multiscale responses to validate the effectiveness of load simplification.

关键词： Railway ballast Particle movements Contact distribution Waveform sensitivity 3D discrete element method

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基于GBVS的假目标红外欺骗干扰效能评估

激光与光电子学进展 2023年第12期60卷 160-165页

作者：仇永佳程正东赵大鹏杨华朱斌章沁钰国防科技大学电子对抗学院安徽合肥230037 脉冲功率激光技术国家重点实验室安徽合肥230037 红外与低温等离子体安徽省重点实验室安徽合肥230037

针对假目标红外欺骗干扰效能缺乏规范评估体系的问题,利用视觉显著性模型计算同一背景下真目标和假目标的显著性对比度,从而定量评估假目标的红外欺骗干扰效能。量值越小,说明假目标的红外欺骗干扰效果越好。实验结果表明,该评估方法不... 详细信息

针对假目标红外欺骗干扰效能缺乏规范评估体系的问题,利用视觉显著性模型计算同一背景下真目标和假目标的显著性对比度,从而定量评估假目标的红外欺骗干扰效能。量值越小,说明假目标的红外欺骗干扰效果越好。实验结果表明,该评估方法不仅能定量反映单一假目标的红外欺骗干扰效能,还能区分不同类型假目标的红外欺骗干扰效能,具有较强的普适性。

关键词：图像处理红外欺骗干扰效能定量评估视觉显著性假目标

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三种关节镜手术方式治疗EllmanⅡ级关节侧部分肩袖损伤的疗效比较

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中华创伤杂志 2020年第9期36卷 779-784页

作者：蒋仕林袁锋邱勇嘉赵金忠王锋陆叶涂兵上海交通大学附属第六人民医院东院运动医学科 201306

目的比较关节镜下清理、穿肌腱修补和全层修补技术治疗EllmanⅡ级关节侧部分肩袖损伤的临床疗效。方法采用回顾性病例对照研究分析2017年12月—2019年12月上海交通大学附属第六人民医院东院收治的45例EllmanⅡ级关节侧部分肩袖损伤患者... 详细信息

目的比较关节镜下清理、穿肌腱修补和全层修补技术治疗EllmanⅡ级关节侧部分肩袖损伤的临床疗效。方法采用回顾性病例对照研究分析2017年12月—2019年12月上海交通大学附属第六人民医院东院收治的45例EllmanⅡ级关节侧部分肩袖损伤患者临床资料,其中男18例,女27例;年龄38~66岁[(56.4±5.0)岁]。15例行镜下清理术(镜下清理组),15例行镜下穿肌腱修补术(镜下穿肌腱修补组),15例行镜下全层修补术(镜下全层修补组)。观察三组手术时间及术后并发症情况。比较三组间术前、术后3个月及末次随访时美国肩肘外科(ASES)评分和加利福尼亚大学洛杉矶分校(UCLA)评分。结果患者均获随访8~32个月[(18.2±6.3)个月]。镜下清理组、镜下穿肌腱修补组和镜下全层修补组手术时间分别为(43.7±3.1)min、(89.1±5.4)min、(62.2±3.6)min(P0.05)。末次随访时三组ASES评分分别为(90.1±1.6)分、(89.3±1.0)分、(89.4±1.0)分,UCLA评分分别为(30.3±2.1)分、(29.0±2.3)分、(28.9±2.7)分,组间比较差异均无统计学意义(P>0.05)。术后3个月三组ASES评分分别为(84.4±2.3)分、(73.5±3.6)分、(73.6±3.2)分,UCLA评分分别为(26.9±1.4)分、(21.4±1.0)分、(21.1±1.0)分,其中镜下穿肌腱修补组与镜下全层修补组ASES评分和UCLA评分比较差异无统计学意义(P>0.05),镜下清理组ASES评分和UCLA评分分别高于其他两组(P<0.05)。结论关节镜下清理术、穿肌腱修补术和全层修补术均是治疗EllmanⅡ级关节侧部分肩袖损伤的有效方式,但镜下清理术的手术时间和早期效果短于或优于镜下穿肌腱修补术及镜下全层修补术。

关键词：肩关节镜肩袖损伤

Potassium and calcium channels in different nerve cells act as therapeutic targets in neurological disorders

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Neural Regeneration Research 2025年第5期20卷 1258-1276页

作者： Qing qiu Mengting Yang Danfeng Gong Haiying Liang Tingting Chen Department of Pharmacology School of PharmacyNantong UniversityNantongJiangsu ProvinceChina Jiangsu Province Key Laboratory of Inflammation and Molecular Drug Target NantongJiangsu ProvinceChina Department of Pharmacy Longyan First Affiliated Hospital of Fujian Medical UniversityLongyanFujian ProvinceChina

The central nervous system, information integration center of the body, is mainly composed of neurons and glial cells. The neuron is one of the most basic and important structural and functional units of the central nervous system, with sensory stimulation and excitation conduction functions. Astrocytes and microglia belong to the glial cell family, which is the main source of cytokines and represents the main defense system of the central nervous system. Nerve cells undergo neurotransmission or gliotransmission, which regulates neuronal activity via the ion channels, receptors, or transporters expressed on nerve cell membranes. Ion channels, composed of large transmembrane proteins, play crucial roles in maintaining nerve cell homeostasis. These channels are also important for control of the membrane potential and in the secretion of neurotransmitters. A variety of cellular functions and life activities, including functional regulation of the central nervous system, the generation and conduction of nerve excitation, the occurrence of receptor potential, heart pulsation, smooth muscle peristalsis, skeletal muscle contraction, and hormone secretion, are closely related to ion channels associated with passive transmembrane transport. Two types of ion channels in the central nervous system, potassium channels and calcium channels, are closely related to various neurological disorders, including Alzheimer's disease, Parkinson's disease, and epilepsy. Accordingly, various drugs that can affect these ion channels have been explored deeply to provide new directions for the treatment of these neurological disorders. In this review, we focus on the functions of potassium and calcium ion channels in different nerve cells and their involvement in neurological disorders such as Parkinson's disease, Alzheimer's disease, depression, epilepsy, autism, and rare disorders. We also describe several clinical drugs that target potassium or calcium channels in nerve cells and could be u

关键词： astrocytes calcium channels central nervous system extracellular ion concentration microglia neurological disorders neurons potassium channels

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen Liu Xuliang Lin Xueqing qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

AAV2-PDE6B restores retinal structure and function in the retinal degeneration 10 mouse model of retinitis pigmentosa by promoting phototransduction and inhibiting apoptosis

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Neural Regeneration Research 2025年第8期20卷 2408-2419页

作者： Ruiqi qiu Mingzhu Yang Xiuxiu Jin Jingyang Liu Weiping Wang Xiaoli Zhang Jinfeng Han Bo Lei Henan Eye Hospital Henan Provincial People’s HospitalPeople’s Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Eye Institute Henan Academy of Innovations in Medical ScienceZhengzhouHenan ProvinceChina Branch of National Clinical Research Center for Ocular Disease Henan Provincial People’s HospitalZhengzhouHenan ProvinceChina Academy of Medical Science Zhengzhou UniversityZhengzhouHenan ProvinceChina

Retinitis pigmentosa is a group of inherited diseases that lead to retinal degeneration and photoreceptor cell ***,there is no effective treatment for retinitis pigmentosa caused by PDE6B ***-associated virus(AAV)-mediated gene therapy is a promising strategy for treating retinitis *** aim of this study was to explore the molecular mechanisms by which AAV2-PDE6B rescues retinal *** do this,we injected retinal degeneration 10(rd10)mice subretinally with AAV2-PDE6B and assessed the therapeutic effects on retinal function and structure using dark-and light-adapted electroretinogram,optical coherence tomography,and ***-independent acquisition-mass spectrometry-based proteomic analysis was conducted to investigate protein expression levels and pathway enrichment,and the results from this analysis were verified by real-time polymerase chain reaction and western ***2-PDE6B injection significantly upregulated PDE6βexpression,preserved electroretinogram responses,and preserved outer nuclear layer thickness in rd10 *** expressed proteins between wild-type and rd10 mice were closely related to visual perception,and treating rd10 mice with AAV2-PDE6B restored differentially expressed protein expression to levels similar to those seen in wild-type *** Encyclopedia of Genes and Genome analysis showed that the differentially expressed proteins whose expression was most significantly altered by AAV2-PDE6B injection were enriched in phototransduction ***,the phototransductionrelated proteins Pde6α,Rom1,Rho,Aldh1a1,and Rbp1 exhibited opposite expression patterns in rd10 mice with or without AAV2-PDE6B ***,Bax/Bcl-2,p-ERK/ERK,and p-c-Fos/c-Fos expression levels decreased in rd10 mice following AAV2-PDE6B *** data suggest that AAV2-PDE6B-mediated gene therapy promotes phototransduction and inhibits apoptosis by inhibiting the ERK signaling pathway and upr

关键词： apoptosis AAV2-PDE6B ERK1/2 gene therapy phototransduction proteomics rd10 retinitis pigmentosa

Nanograting‑Based Dynamic Structural Colors Using Heterogeneous Materials

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Nano-Micro Letters 2025年第3期17卷 138-151页

作者： Jingang Wang Haibo Yu Jianchen Zheng Yuzhao Zhang Hongji Guo Ye qiu Xiaoduo Wang Yongliang Yang Lianqing Liu State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Dynamic structuralcolors can change in response todifferent environmental *** ability remains effectiveeven when the size of the speciesresponsible for the structural coloris reduced to a few micrometers,providing a promising sensingmechanism for solving microenvironmentalsensing problems inmicro-robotics and ***, the lack of dynamicstructural colors that can encoderapidly, easily integrate, and accuratelyreflect changes in physical quantities hinders their use in microscale sensing applications. Herein, we present a 2.5-dimensionaldynamic structural color based on nanogratings of heterogeneous materials, which were obtained by interweaving a pH-responsive hydrogelwith an IP-L photoresist. Transverse gratings printed with pH-responsive hydrogels elongated the period of longitudinal grating in the swollenstate, resulting in pH-tuned structural colors at a 45° incidence. Moreover, the patterned encoding and array printing of dynamic structuralcolors were achieved using grayscale stripe images to accurately encode the periods and heights of the nanogrid structures. Overall, dynamicstructural color networks exhibit promising potential for applications in information encryption and in situ sensing for microfluidic chips.

关键词： Dynamic structural colors Four-dimensional printing pH-responsive Nanogrid Heterogeneous materials

An investigation on the wind profiles and gravity wave dynamics in MLT region based on the meteor radars from the Meridian Project

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Earth and Planetary Physics 2025年第1期9卷 29-38页

作者： Tai Liu Zhe Wang MengXi Shi Willie Soon ShiCan qiu Department of Geophysics College of the Geology Engineering and GeomaticsChang’an UniversityXi’an 710054China Center for Environmental Research and Earth Sciences(CERES) SalemMA 01970USA Institute of Earth Physics and Space Science(ELKH EPSS) 9400SopronHungary

The meteor radar can detect the zenith angle,azimuth,radial velocity,and altitude of meteor trails so that one can invert the wind profiles in the mesosphere and low thermosphere(MLT)region,based on the Interferometric and Doppler *** this paper,the horizontal wind field,gravity wave(GW)disturbance variance,and GW fluxes are analyzed through the meteor radar observation from 2012−2022,at Mohe(53.5°N,122.4°E)and Zuoling(30.5°N,114.6°E)stations of the(Chinese)Meridian *** Lomb−Scargle periodogram method has been utilized to analyze the periodic variations for time series with observational data *** results show that the zonal winds at both stations are eastward dominated,while the meridional winds are southward *** variance of GW disturbances in the zonal and meridional directions increases gradually with height,and there is a strong pattern of annual *** zonal momentum flux of GW changes little with height,showing weak annual *** meridional GW flux varies gradually from northward to southward with height,and the annual periodicity is *** both stations,the maximum values of zonal and meridional wind occur close to the peak heights of GW flux,with opposite *** observational evidence is consistent with the filtering *** horizontal wind velocity,GW flux,and disturbance variance of the GW at Mohe are overall smaller than those at Zuoling,indicating weaker activities in the MLT at *** power spectral density(PSD)calculated by the Lomb−Scargle periodogram shows that there are 12-month period and 6-month period in horizontal wind field,GW disturbance variance and GW flux at both stations,and especially there is also a 4-month cycle in the disturbance *** PSD of the 12-month and 6-month cycles exhibits maximum values below 88 km and above 94 km.

关键词： meteor radar wind field gravity wave Lomb−Scargle method

脂代谢异常人群亚临床甲状腺功能减退患病率及相关因素研究

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临床研究 2024年第3期32卷 1-4页

作者：陈秀勤蒙秀坚莫石贤邱永佳梧州市红十字会医院检验科广西梧州543000 广西医科大学第七附属医院输血科广西梧州543000 梧州市人民医院检验科广西梧州543000

目的探讨脂代谢异常人群亚临床甲状腺功能减退(SCH)患病率及相关因素。方法选择梧州市红十字会医院2018年1月至2022年12月收入的3650例脂代谢异常人群,分析SCH患病率,对SHC患者和非SCH患者的临床资料进行对比,将有差异项目带入Logistic... 详细信息

目的探讨脂代谢异常人群亚临床甲状腺功能减退(SCH)患病率及相关因素。方法选择梧州市红十字会医院2018年1月至2022年12月收入的3650例脂代谢异常人群,分析SCH患病率,对SHC患者和非SCH患者的临床资料进行对比,将有差异项目带入Logistic回归方程计算,分析其对脂代谢异常人群患SCH的影响。结果脂代谢异常人群中SCH患者962例,患病率26.36%;对SCH患者及非SCH患者一般资料进行单因素Logistic回归分析发现性别、身体质量指数(BMI)、甘油三酯(TG)、舒张压(DP)、抗甲状腺球蛋白抗体(TgAb)、收缩压(SP)、年龄、空腹血浆葡萄糖(FBG)、低密度脂蛋白(LDL-C)、负荷后2 h血糖(2hPG)、总胆固醇(TC)、高密度脂蛋白(HDL-C)、谷草转氨酶(AST)、血钙、血磷、血尿酸(UA)、抗甲状腺过氧化物酶抗体(TPOAb)在两组中差异有统计学意义(P<0.05);不同种类脂代谢异常以高TG血症居多,差异有统计学意义(P<0.05),而脂代谢异常人群SCH患病率混合高脂血症最高,差异有统计学意义(P<0.05);将以上对比有差异的影响因素进行多因素Logistic回归分析发现性别、年龄、SP、TC、FBG、2hPG均为影响脂代谢异常人群患SCH的独立因素。结论脂代谢异常与SCH疾病发生之间有紧密联系,患病情况在女性、高龄患者中更突出,血脂可能在一定程度上影响甲状腺激素的分泌,最终引发SCH,因此临床需重视相关因素并进行防治。

关键词：脂代谢异常亚临床甲状腺功能减退血脂血糖甲状腺激素