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Investigation of mechanical and electrical characteristics of selfsensing pneumatic torsional actuators

Science China(Technological Sciences) 2024年第1期67卷 130-142页

作者： XIAO wei HU DeAn HU GuoLiang XIAO yihua Key Laboratory of Conveyance and Equipment Ministry of EducationEast China Jiaotong UniversityNanchang 330013China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha 410082China

Soft pneumatic actuators are one of the most promising actuation for soft robots,and great achievements have been *** it remains challenging to endow sensing capabilities to pneumatic actuators,especially for the sensing ability originating directly from the actuator ***,a self-sensing pneumatic torsional actuator(SPTA)is designed based on the electromagnetic induction effect and magnetically responsive *** SPTA can generate feedback voltage and current with the deformation,in which the sensing function comes from its inherent *** investigate the mechanical and electrical characteristics,an experimental platform and a finite element model are established,*** find that the torsion angle and output torque increase in nonlinear with the actuating *** maximum torsion angle is 66.35°,which is 84.34%of that for the actuator fabricated by pure *** maximum output torque(24.9 N mm)improves by 23.19%compared with the actuator made by pure *** regards the electrical characteristics,the maximum feedback voltage and current are 2.90μV and 29.50 nA when the SPTA is actuated by a pressure of−40 *** also demonstrate that the relationship between the torsion angle and the magnetic flux change is approximately ***,the number of turns of wires,magnetic powders contents,and magnetic direction on the feedback voltage and current are *** show that the feedback voltage and current can be enhanced by increasing the number of turns and magnetic powders *** envision that the SPTA would be promising for soft robots to realize their accuracy control and intelligentization.

关键词： pneumatic torsional actuators self-sensing feedback voltage finite element modeling soft robots

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不同种植方式及生长年限的铜鼓多花黄精营养品质分析及其评价体系的构建

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食品工业科技 2024年第17期45卷 316-326页

作者：黄正花余应梅严寒邵珊珊屈若兰黄坚陈政魏益华王冬根李思明江西省农业科学院农产品质量安全与标准研究所江西南昌330200

为了系统探究铜鼓多花黄精的营养品质并构建其评价体系,本文比较分析了不同种植方式和生长年限的铜鼓多花黄精23种营养品质指标,并通过相关性、因子和聚类分析构建了其营养品质评价体系。结果显示大棚种植(GP)多花黄精中的醇溶性浸出物... 详细信息

为了系统探究铜鼓多花黄精的营养品质并构建其评价体系,本文比较分析了不同种植方式和生长年限的铜鼓多花黄精23种营养品质指标,并通过相关性、因子和聚类分析构建了其营养品质评价体系。结果显示大棚种植(GP)多花黄精中的醇溶性浸出物、蛋白质、必需氨基酸、药用氨基酸、灰分及5种常量矿物元素含量均最高,且必需氨基酸营养评分也最高。露天种植(OP)多花黄精中的多糖和皂苷含量最高。林下种植(UP)4种微量元素(Fe、Mn、Zn和Se)含量最高。而野生(W)多花黄精的黄酮和总酚含量最高。随着多花黄精生长年限的延长,多花黄精中醇溶性浸出物、脂肪和多糖含量逐渐增加,而皂苷、黄酮和总酚含量无显著性变化(P>0.05)。但多花黄精的淀粉、粗纤维、蛋白质、灰分、必需氨基酸营养评分、矿物元素等物质含量均与生长年限呈负相关性,其中以GP下降趋势最为明显。通过相关性分析、因子分析和聚类分析将22项营养品质指标简化为13项指标,进而采用主成分分析建立了多花黄精营养品质综合评价模型,发现8种铜鼓多花黄精样品营养品质综合评分(-1.331~1.161)大小顺序为GP-3>UP-3>W-4>GP-5>GP-4>OP-3>UP-4>OP-4,即GP-3的营养品质最佳,并在此基础上建立了铜鼓多花黄精营养品质综合评分6级标准。本研究成果将为筛选最佳营养品质的铜鼓多花黄精原料进行高价值产品开发或品种改良提供理论依据。

关键词：多花黄精营养品质种植方式主成分分析评价体系

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The role of signaling crosstalk of microglia in hippocampus on progression of ageing and Alzheimer's disease

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药物分析学报:英文版 2023年第7期13卷 788-805页

作者： He Li Tianyuan Ye Xingyang Liu Rui Guo Xiuzhao Yang Yangyi Li Dongmei Qi yihua wei Yifan Zhu Lei Wen Xiaorui Cheng Innovative Institute of Chinese Medicine and Pharmacy Shandong University of Traditional Chinese MedicineJinan250355China Xiamen Key Laboratory for TCM Dampness Disease Neurology&Immunology ResearchDepartment of Traditional Chinese MedicineXiang'an HospitalSchool of MedicineXiamen UniversityXiamenFujian361102China Experimental Center Shandong University of Traditional Chinese MedicineJinan250355China

Based on single-cell sequencing of the hippocampi of 5×familiar Alzheimer's disease(5×FAD)and wild type mice at 2-,12-,and 24-month of age,we found an increased percentage of microglia in aging and Alzheimer's disease(AD)*** brain barrier injury may also have contributed to this *** regulation by microglia plays a major role in the progression of aging and AD,according to the functions of 41 intersecting differentially expressed genes in *** crosstalk between C−C motif chemokine ligand(CCL)and major histocompatibility complex-1 bridges intercellular communication in the hippocampus during aging and *** amyloid precursor protein(APP)and colony stimulating factor(CSF)signals drive 5×FAD to deviate from aging track to AD occurrence among intercellular communication in *** are involved in the progression of aging and AD can be divided into 10 functional *** strength of the interaction among microglial subtypes weakened with aging,and the CCL and CSF signaling pathways were the fundamental bridge of communication among microglial subtypes.

关键词： Alzheimer's disease Microglia Immune Crosstalk Chemokine Colony-stimulating factor

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Multi-Stage Hydrocarbon Accumulation and Formation Pressure Evolution in Sinian Dengying FormationCambrian Longwangmiao Formation, Gaoshiti-Moxi Structure, Sichuan Basin

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Journal of Earth Science 2016年第5期27卷 835-845页

作者： Juan Wu Shugen Liu Guozhi Wang yihua Zhao wei Sun Jinming Song Yanhong Tian State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of Geosciences Chuanzhong Division of Southwest Oil & Gasfield Company Petro China

Sichuan Basin is a typical superimposed basin, which experienced multi-phase tectonic movements, meanwhile Sinian–Cambrian underwent complex hydrocarbon accumulation processes, causing exploration difficulties in the past 60 years. Based on the microscopic evidence of fluid inclusions, combined with basin-modelling, this paper determines stages and time of hydrocarbon accumulation, reconstructs evolution of formation pressure and dynamic processes of hydrocarbon accumulation in Sinian Dengying Formation-Cambrian Longwangmiao Formation of Gaoshiti-Moxi structure. Three stages of inclusions are detected, including a stage of yellow-yellowgreen fluorescent oil inclusions, a stage of blue fluorescent oil-gas inclusions and a stage of non-fluorescent gas inclusions, reflecting the study area has experienced a series of complex hydrocarbon accumulation processes, such as formation of paleo-oil reservoirs, cracking of crude oil, formation of paleo-gas reservoirs and adjustment to present gas reservoirs, which occurred during 219–188, 192–146 and 168–0 Ma respectively. During the period of crude oil cracking, Dengying Formation-Longwangmiao Formation showed weak overpressure to overpressure characteristics, then after adjustment of paleo-gas reservoirs to present gas reservoirs, the pressure in Dengying Formation changed into overpressure but finally reduced to normal pressure system. However, due to excellent preservation conditions, the overpressure strength in Longwangmiao Formation only slightly decreased and was still kept to this day.

关键词： Sichuan Basin Gaoshiti-Moxi structure Sinian-Cambrian hydrocarbon accumulation,formation pressure fluid inclusion.

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国有企业改革对共同富裕的影响效应研究

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当代经济研究 2023年第5期333卷 46-56页

作者：魏益华周雯吉林大学经济学院长春130012 吉林大学国有经济研究中心长春130012

作为经济体制改革的中心环节,国有企业改革始终为共同富裕巩固并夯实所有制基础、分配基础以及物质技术基础,同时也要处理好发展与共享的平衡统一问题,改革成效外在表现为国有经济比重和企业经济效益等指标的变动。通过对共同富裕指标... 详细信息

作为经济体制改革的中心环节,国有企业改革始终为共同富裕巩固并夯实所有制基础、分配基础以及物质技术基础,同时也要处理好发展与共享的平衡统一问题,改革成效外在表现为国有经济比重和企业经济效益等指标的变动。通过对共同富裕指标体系的构建和测度,可进一步实证分析国有企业改革对共同富裕的影响效应及其具体路径,进而为深化改革提供指引。国有企业经济效益对共同富裕的影响体现为双方面,既正向作用于发展水平,同时对共享水平具有负向影响。国有经济比重则主要通过正向作用于共享水平对共同富裕产生影响。国有企业并不简单代表着法权关系,其本质上反映了劳动者与生产资料的直接结合方式以及相应的分配制度。应正视改革在经济收益和社会责任目标下的双重诉求,推动质与量共荣共进。

关键词：国有企业改革共同富裕发展与共享

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Underestimated relationship between westerly wind bursts and ENSO in CMIP6 models

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Atmospheric and Oceanic Science Letters 2023年第6期16卷 16-21页

作者： Mingjie Wang Chaoxia Yuan Jingchan Liu yihua wei Jiye Wu Jingjia Luo Key Laboratory of Meteorological Disaster of Ministry of Education Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersInstitute for Climate and Application Research(ICAR)Nanjing University of Information Science&TechnologyNanjing China

观测表明,热带太平洋的西风爆发(WWBs)在厄尔尼诺南方涛动(ENSO)的发生,发展和多样性中起着关键作用.因此,在耦合模式中真实地再现WWBs对于改进ENSO的模拟和预测有重要意义.在本研究中,作者发现CMIP6的耦合模式的集合平均能很好地再现... 详细信息

观测表明,热带太平洋的西风爆发(WWBs)在厄尔尼诺南方涛动(ENSO)的发生,发展和多样性中起着关键作用.因此,在耦合模式中真实地再现WWBs对于改进ENSO的模拟和预测有重要意义.在本研究中,作者发现CMIP6的耦合模式的集合平均能很好地再现了热带太平洋WWB发生频率的纬向分布及其年际变动.然而,大多数CMIP6模型极大低估了WWB和ENSO的线性关系.这可能是因为大多数CMIP6模式里海气耦合强度低于观测:海气耦合强度与WWB-ENSO关系的模式间相关系数高达0.91.

关键词：西风爆发 ENSO CMIP6模式

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A low-frequency and broadband wave-insulating vibration isolator based on plate-shaped metastructures

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1171-1188页

作者： wei wei Feng GUAN Xin FANG College of Intelligent Science National University of Defense Technology Naval Research Academy

A metamaterial vibration isolator, termed as wave-insulating isolator, is proposed, which preserves enough load-bearing capability and offers ultra-low and broad bandgaps for greatly enhanced wave insulation. It consists of plate-shaped metacells,whose symmetric and antisymmetric local resonant modes offer several low and broad mode bandgaps although the complete bandgap remains high and narrow. The bandgap mechanisms, vibration isolation properties, effects of key parameters, and robustness to complex conditions are clarified. As experimentally demonstrated, the wave-insulating isolator can improve the vibration insulation in the ranges of [50 Hz, 180 Hz] and [260 Hz,400 Hz] by 15 dB and 25 dB, respectively, in contrast to the conventional isolator with the same first resonant frequency.

关键词： metamaterial and metastructure vibration isolation bandgap wave insulation plate O328 34A30 74K20

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Humic acid-mediated transport of a typical soil passivation remediation product(chloropyromorphite)in saturated porous media

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Journal of Environmental Sciences 2024年第7期141卷 51-62页

作者： Xinying Li Mengjia Zhang Siyuan Li wei wei School of Environment Jiangsu Engineering Lab of Water and Soil Eco-remediationJiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response TechnologyNanjing Normal UniversityNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China

Conversion of labile Pb species into chloropyromorphite(CPY)using phosphorus-bearing amendments was considered to be an ideal strategy in soil passivation ***,the fate and transport of CPY in the soil are poorly *** study aims to fill the knowledge gap by evaluating the fate and transport of CPY under environmentally relevant conditions of humic acid(HA),pH,electrolyte concentration,and species through the saturated sandy *** showed that bare CPY colloids are basically immobile in sandy porous media while the co-existence of HA made the transport of CPY improved by30%-93.5%.Facilitated transport of CPY was attributed to the increased stability of CPY and the repulsive interaction between CPY particles and sands due to HA *** mobility of CPY was also increased with increasing pH from 5.0 to *** the pH was 9 with a10 mmol/L NaCl background solution,the stronger energy barrier between CPY and sand led to enhanced transport *** divalent Ca^(2+)had a more dramatic effect than monovalent Na^(+)on the aggregation and sedimentation of CPY colloids due to its effectivescreening of the surface charge of CPY and bridging interaction with CPY ***-LandauVerwey-Overbeek theory and attachment efficiency calculation indicated that high energy barriers were responsible for the high mobility of CPY colloids,while the retention of CPY in sands was mainly caused by secondary energy minimum and physically *** findings of this work can help to evaluate the fate of soil passivation remediation products in natural water and soil.

关键词： Chloropyromorphite DLVO theory Stability Saturated porous medium Transport

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The Existence of a Meridional Curve in Closed Incompressible Surfaces in Fully Alternating Link Complements

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 73-80页

作者： wei LIN School of Mathematical Sciences Dalian University of TechnologyDalian 116024LiaoningChina

Menasco showed that a closed incompressible surface in the complement of a non-split prime alternating link in S^(3) contains a circle isotopic in the link complement to a meridian of the *** on this result,he was able to argue the hyperbolicity of non-split prime alternating links in *** et *** that if F■S×I\L is an essential torus,then F contains a circle which is isotopic in S×I\L to a meridian of *** author generalizes his result as follows:Let S be a closed orientable surface,L be a fully alternating link in S×I\If F ■ S×I\L is a closed essential surface,then F contains a circle which is isotopic in S×I\L to a meridian of L.

关键词： Fully alternating Incompressible surfaces Meridionally incompressible

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马克思、列宁的对外直接投资思想及其方法论意义

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当代经济研究 2005年第7期 14-17页

作者：魏益华吉林大学经济学院吉林长春130012

人们在研究对外直接投资时,更多注重的是西方经济学家的有关理论。实际上,马克思是较早系统分析对外直接投资的代表人物之一。他从揭示资本主义产生、发展和灭亡的规律出发,着重在资本主义生产关系方面,对对外直接投资进行了阐述,提出... 详细信息

人们在研究对外直接投资时,更多注重的是西方经济学家的有关理论。实际上,马克思是较早系统分析对外直接投资的代表人物之一。他从揭示资本主义产生、发展和灭亡的规律出发,着重在资本主义生产关系方面,对对外直接投资进行了阐述,提出了资本过剩型的资本输出理论。在此基础上列宁也提出了垄断过剩资本为追求高额垄断利润而开展对外直接投资的理论。马克思主义经典作家的这些思想对我们今天研究对外直接投资仍具有重要的方法论意义。

关键词：对外直接投资方法论意义思想列宁马克思主义经典作家资本主义生产关系西方经济学家代表人物系统分析资本输出资本过剩垄断利润过剩资本

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