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A Biomimetic Rotor-configuration Design for Optimal Aerodynamic Performance in Quadrotor Drone

Journal of Bionic Engineering 2021年第4期18卷 824-839页

作者： yi Li Koichi Yonezawa ru Xu Hao Liu Graduate School of Engineering Chiba University1-33 Yayoi-choInage-kuChiba263-8522Japan Central Research Institute of Electric Power Industry Civil Engineering Research Laboratory1646 AbikoAbiko-shi270-1194Japan

Motivated by optimal combination of paired wings configuration and troke-plane inclination in biological flapping flights that can achieve high aerodynamic performance,we propose a biomimetic rotor-configuration design to explore optimal aerodynamic performance in multirotor *** aerodynamic interactions among propellers in multirotor Unmanned Aerial Vehicles(UAVs)play a crucial role in lift force production and Figure of Merit(FM)efficiency,the rotor-configuration effect remains poorly *** we address a Computational Fluid Dynamics(CFD)-based study on optimal aerodynamic performance of the rotor-configuration in hovering quadrotor drones with a specific focus on the aerodynamic effects of tip distance,height difference and tilt angle of *** results indicate that the tip distance-induced interactions can most alter lift force production and hence lead to remarked improvement in FM,and the height difference also plays a key role in improving aerodynamic performance,while the tilt angle effect is less ***,we carried out an extensive analysis to explore the optimal aerodynamic performance of the rotor-configuration over a broad parameter space,by combining the CFD-based simulations and a novel surrogate *** find that a rotor-configuration with a large tip distance and some height difference with zero tilt angle is capable of optimizing both lift force production and FM,which could offer a novel optimal design as well as maneuver strategy for multirotor UAVs.

关键词： bioinspiration optimal quadrotor configuration aerodynamic interactions aerodynamic performance CFD surrogate modeling

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Neuroprotective effect of mesenchymal stem cellderived extracellular vesicles on optic nerve injury in chronic ocular hypertension

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Neural Regeneration Research 2023年第10期18卷 2301-2306页

作者： Fei Yu Yao Wang Chang-Quan huang Si-Jie Lin ru-Xin Gao Ren-yi Wu Department of Glaucoma Eye Institute and Affiliated Xiamen Eye Center of Xiamen UniversitySchool of MedicineXiamen UniversityXiamenFujian ProvinceChina Fujian Provincial Key Laboratory of Corneal&Ocular Surface Diseases XiamenFujian ProvinceChina Shaanxi Provincial Key Lab of Ophthalmology Shaanxi Clinical Study Center for Ocular DiseaseShaanxi Institute of OphthalmologyFirst Affiliated HospitalMedical SchoolNorthwest UniversityXi’anShaanxi ProvinceChina Eye Institute of Xiamen University Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujian ProvinceChina Department of Glaucoma Shanghai Peace Eye HospitalShanghaiChina

Mesenchymal stem cells have neuroprotective effects that limit damage to the retina and photoreceptors,and which may be mediated by extracellular vesicles(or exosomes)released by mesenchymal stem *** investigate the neuroprotective effect of extracellular vesicles derived from umbilical cord mesenchymal stem cells on glaucoma,we established rat models of chronic ocular hypertension by injecting conjunctival fibroblasts into the anterior chamber to mimic optic nerve injury caused by *** week after injury,extracellular vesicles derived from umbilical cord-derived mesenchymal stem cells were injected into the vitreous *** found that extracellular vesicles derived from mesenchymal stem cells substantially reduced retinal damage,increased the number of retinal ganglion cells,and inhibited the activation of *** findings suggest that mesenchymal stem cell-derived extracellular vesicles can help alleviate optic nerve injury caused by chronic ocular hypertension,and this effect is achieved by inhibiting cell apoptosis.

关键词： animal model apoptosis chronic glaucoma chronic ocular hypertension extracellular vesicles mesenchymal stem cells neuroprotection rat retinal ganglion cells umbilical cord

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社区支持农业模式下绿色互动对消费者价值共创行为的影响

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中国流通经济 2025年第1期39卷 86-99页

作者：张蓓黄薏翰朱吉婵华南农业大学经济管理学院广东广州510642 广东省哲学社会科学重点实验室--乡村振兴实验室广东广州510642 广东省哲学社会科学重点实验室--农业农村政策与改革创新实验室广东广州510642

引导消费者参与价值共创有助于促进社区支持农业高质量发展,推动农业现代化转型升级。基于双系统理论,探讨两种不同形式的绿色互动对消费者价值共创行为的影响,以及数字信任与绿色信任的并行中介作用和社区氛围的调节效应。采用偏最小... 详细信息

引导消费者参与价值共创有助于促进社区支持农业高质量发展,推动农业现代化转型升级。基于双系统理论,探讨两种不同形式的绿色互动对消费者价值共创行为的影响,以及数字信任与绿色信任的并行中介作用和社区氛围的调节效应。采用偏最小二乘结构方程模型(PLS-SEM)对收集的472份有效调查数据进行分析。研究发现:绿色情感互动和绿色信息互动正向促进消费者价值共创行为,且前者的作用更显著,表明绿色情感互动通过触发消费者对社区支持农业绿色生产理念的价值共振,对消费者价值共创行为的正向作用更大;数字信任和绿色信任在其中起并行中介作用,即绿色情感互动与绿色信息互动通过数字信任和绿色信任两条并行的心理机制路径间接影响消费者价值共创行为。值得关注的是,社区氛围不仅削弱数字信任与消费者价值共创行为间的关系,还会弱化绿色情感互动与绿色信息互动通过数字信任和绿色信任影响消费者价值共创行为的间接效应,较强的社区氛围或许引发信息超载和虚假舆论等负面影响,导致绿色互动通过消费者信任对价值共创行为的间接影响减弱。鉴于此,为更好促进消费者价值共创行为,社区支持农业实践者应为消费者打造沉浸式交互场景,强化成员间绿色价值情感纽带;开发可视化溯源系统,筑牢消费者对社区支持农业的数字信任与绿色信任基础;畅通多元化交流渠道,营造理性自由社区氛围。研究结论从理论上厘清绿色互动如何促进消费者价值共创行为,从实践上为优化社区支持农业经营策略,推进农业农村现代化提供有益借鉴。

关键词：绿色互动信任价值共创行为社区氛围社区支持农业

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Analytical current model of tunneling field-effect transistor considering the impacts of both gate and drain voltages on tunneling

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Science China(Information Sciences) 2015年第2期58卷 174-181页

作者： WANG Chao WU ChunLei WANG JiaXin huang QianQian huang ru Key Laboratory of Microelectronic Devices and Circuits Institute of Microelectronics Peking University

In this paper, a closed-form current model for bulk tunneling field-effect transistor(TFET) is put forward. Based on the operation mechanism, the channel surface potential φsf which involves the impact of both the gate and the drain voltages is established for the first time. In addition, a new calculation method for the dynamic tunneling width, which is the critical parameter for the TFET modeling, is derived from the surface potential. The surface-potential-based current model is established which is in a good agreement with TCAD simulation results.

关键词： tunneling field-effect transistor current model surface potential drain voltage tunneling width

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Convergence in Conformal Field Theory

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Chinese Annals of Mathematics,Series B 2022年第6期43卷 1101-1124页

作者： yi-Zhi huang Department of Mathematics Rutgers UniversityPiscatawayNJ 08854USA

Convergence and analytic extension are of fundamental importance in the mathematical construction and study of conformal field *** author reviews some main convergence results,conjectures and problems in the construction and study of conformal field theories using the representation theory of vertex operator *** also reviews the related analytic extension results,conjectures and *** discusses the convergence and analytic extensions of products of intertwining operators(chiral conformal fields)and of q-traces and pseudo-q-traces of products of intertwining *** also discusses the convergence results related to the sewing operation and the determinant line bundle and a higher-genus convergence *** then explains conjectures and problems on the convergence and analytic extensions in orbifold conformal field theory and in the cohomology theory of vertex operator algebras.

关键词： Conformal field theory Vertex operator algebras Representation theory Convergence Analytic extension

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模因论教学法对大学英语低级别学生产出性词汇学习的影响

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肇庆学院学报 2025年第1期46卷 66-72页

作者：陈宜黄洪志福建医科大学文理艺术学院福建福州350122

本研究探讨了基于模因论的英语教学方法对大学英语低级别学生产出性词汇学习效果的影响。研究选取两个英语低级别班级作为实验对象,随机分为实验组(n=51)和对照组(n=51)。实验组接受基于模因论的词汇教学,而对照组则采用传统教学方法。... 详细信息

本研究探讨了基于模因论的英语教学方法对大学英语低级别学生产出性词汇学习效果的影响。研究选取两个英语低级别班级作为实验对象,随机分为实验组(n=51)和对照组(n=51)。实验组接受基于模因论的词汇教学,而对照组则采用传统教学方法。研究通过前测和两次后测收集数据,使用独立样本t检验分析每次测试中两组学生在产出性词汇掌握程度上的差异。结果显示,实验组在两次后测中的词汇学习成绩均显著优于对照组,表明基于模因论的教学方法能有效提高大学英语低级别学生的产出性词汇能力。本研究为英语词汇教学,特别是针对低级别学习者的教学策略提供了新的思路和实证依据,对提升学生的英语表达能力具有一定意义。

关键词：模因论大学英语低级别学生产出性词汇

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Effects of different frequencies of repetitive transcranial magnetic stimulation on the recovery of upper limb motor dysfunction in patients with subacute cerebral infarction

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Neural Regeneration Research 2016年第10期11卷 1584-1590页

作者： Jiang Li Xiang-min Meng ru-yi Li ru Zhang Zheng Zhang yi-feng Du Shandong Provincial Hospital of Shandong University Jinan Shandong Province China Affiliated Hospital of Qingdao University Qingdao Shandong Province China

Studies have confirmed that low-frequency repetitive transcranial magnetic stimulation can decrease the activity of cortical neurons, and high-frequency repetitive transcranial magnetic stimulation can increase the excitability of cortical neurons. However, there are few studies concerning the use of different frequencies of repetitive transcranial magnetic stimulation on the recovery of upper-limb motor function after cerebral infarction. We hypothesized that different frequencies of repetitive transcranial magnetic stimulation in patients with cerebral infarction would produce different effects on the recovery of upper-limb motor function. This study enrolled 127 patients with upper-limb dysfunction during the subacute phase of cerebral infarction. These patients were randomly assigned to three groups. The low-frequency group comprised 42 patients who were treated with 1 Hz repetitive transcranial magnetic stimulation on the contralateral hemisphere primary motor cortex （M1）. The high-frequency group comprised 43 patients who were treated with 10 Hz repetitive transcranial magnetic stimulation on ipsilateral M1. Finally, the sham group comprised 42 patients who were treated with 10 Hz of false stimulation on ipsilateral M1. A total of 135 seconds of stimulation was applied in the sham group and high-frequency group. At 2 weeks after treatment, cortical latency of motor-evoked potentials and central motor conduction time were significantly lower compared with before treatment. Moreover, motor function scores were significantly improved. The above indices for the low- and high-frequency groups were significantly different compared with the sham group. However, there was no significant difference between the low- and high-frequency groups. The results show that low- and high-frequency repetitive transcranial magnetic stimulation can similarly improve upper-limb motor function in patients with cerebral infarction.

关键词： nerve regeneration brain injury repetitive transcranial magnetic stimulation cerebral infarction low-frequency stimulation high-frequency stimulation upper-limb motor function cerebral cortex stroke rehabilitation motor-evoked potential central motor conductiontime primary motor cortex neuroplasticity neural reorganization neural regeneration

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Analysis of the anti-T2DM components in dichloromethane fraction of Schisandra sphenanthera and its mechanism

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Traditional Medicine Research 2025年第1期10卷 27-43页

作者： Shi-Bo Feng Hai-Hui Jiang Hui-Li Kang yi Jiang Hua-Wei Zhang Xiao-Mei Song Yu-Ze Li Wen-Li huang Dong-Dong Zhang Chong Deng School of Pharmacy Shaanxi University of Chinese MedicineXianyang 712046China School of Pharmacy and Shaanxi Qinling Application Development and Engineering Center of Chinese Herbal Medicine Shaanxi University of Chinese MedicineXianyang 712046China Key Laboratory for Research and Development of“Qin Medicine”of Shaanxi Administration of Traditional Chinese Medicine Xianyang 712046China Shaanxi Key Laboratory of Research and Application of“Taibai Qi Yao” Xianyang 712046China

Background:The type 2 diabetes mellitus(T2DM)pharmacodynamic study of various parts of Schisandra sphenanthera was conducted in the previous stage,and it was found that dichloromethane extracted part(SDP)had a significant hypoglycemic ***,the components of SDP were analyzed,and the specific mechanism of its anti-T2DM was ***:We used a high-fat,high-sugar diet in combination with streptozotocin to induce a T2DM rat model,and the model rats were divided into two groups according to body weight and blood ***,oral glucose tolerance test,fasting blood glucose,low density lipoprotein cholesterol,superoxide dismutase,insulin,glycated hemoglobin,total cholesterol,nonesterified free fatty acids,alanine aminotransferase,high-density lipoprotein cholesterol,aspartate aminotransferase,malondialdehyde,and glutathione peroxidase were measured,organ indices were calculated,and pathological sections of pancreas and liver were *** 16S rRNA V3–V4 region of intestinal flora was sequenced to explore the effect of SDP on biochemical indicators and intestinal *** on the above indicators,the anti-T2DM mechanism of SDP in Schisandra sphenanthera was ***:After six weeks of administration,the biochemical indices of diabetic rats were diminished compared to the control *** SDP could significantly increase the gut microbialα-diversity index,resulting in significant changes in the flora of T2DM rats,with increased richness and diversity,reduced harmful flora,and significantly back-regulated the levels of acetic acid,propionic acid,and butyric ***:SDP can improve the symptoms associated with elevated blood glucose,dyslipidemia,elevated fasting insulin levels,and damaged glucose tolerance in *** against T2DM may be through the control of intestinal flora to normalize and exert anti-diabetic effect;its main active components may be lignans and terpenoids.

关键词： Schisandra sphenanthera T2DM intestinal flora HPLC

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Complementary tunneling transistors based on WSe2/SnS2 van der Waals heterostructure

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Science China(Information Sciences) 2020年第4期63卷 245-247页

作者： rundong JIA Liang CHEN Qianqian huang ru huang Key Laboratory of Microelectronic Devices and Circuits (MOE) Institute of Microelectronics Peking University

Dear editor,Two-dimensional (2D) semiconductors have emerged as one of the most promising material candidates for next-generation electronic devices [1].Owing to the broad range of bandgap diversity and the pristine i... 详细信息

关键词： Complementary tunneling transistors based on WSe2/SnS2 van der Waals heterostructure VDS

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兽用抗菌复方制剂研究进展

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中国兽医杂志 2025年第1期61卷 106-114页

作者：王茹寇紫艳田校源黄玲利华中农业大学动物医学院国家兽药残留基准实验室湖北武汉430070 国家兽药安全评价实验室湖北武汉430070 农业农村部兽药残留检测重点实验室湖北武汉430070

随着动物感染性疾病的复杂化和细菌耐药性的发展,兽医临床急需对混合感染和耐药菌有效的新型抗菌药物,但新药开发难度大、费用高、周期长。抗菌药联合使用既可以增加抗菌谱,又可以防止耐药性出现,在疾病治疗中起着重要的作用。复方制剂... 详细信息

随着动物感染性疾病的复杂化和细菌耐药性的发展,兽医临床急需对混合感染和耐药菌有效的新型抗菌药物,但新药开发难度大、费用高、周期长。抗菌药联合使用既可以增加抗菌谱,又可以防止耐药性出现,在疾病治疗中起着重要的作用。复方制剂是抗菌药联合使用的简易形式,因此兽用复方制剂研制具有广阔发展空间。本文总结了兽用抗菌复方制剂研发、批准和使用情况的研究进展,提出了兽用抗菌复方制剂研发中存在的主要问题,为今后相关的科学研究和产品研发提供了一定的参考。

关键词：兽药复方制剂抗菌药联合用药

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