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Recent advancement of flow-induced piezoelectric vibration energy harvesting techniques:principles,structures,and nonlinear designs

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 959-978页

作者： Dongxing CAO Junru WANG Xiangying GUO s.k.lai Yongjun sHEN Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China Beijing key Laboratory of Nonlinear Vibrations and strength of Mechanical structures Beijing 100124China school of Automation Beijing Information Science and Technology UniversityBeiing 100192China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina Hong kong Branch of National Rail Transit Electrification and Automation Engineering Technology Research Center The Hong Kong Polytechnic UniversityKowloonHong KongChina state key Laboratory of Mechanical Behavior and system safety of Traffic Engineering structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China

Energy harvesting induced from flowing fluids(e.g.,air and water flows)is a well-known process,which can be regarded as a sustainable and renewable energy *** addition to traditional high-efficiency devices(e.g.,turbines and watermills),the micro-power extracting technologies based on the flow-induced vibration(FIV)effect have sparked great concerns by virtue of their prospective applications as a self-power source for the microelectronic devices in recent *** article aims to conduct a comprehensive review for the FIV working principle and their potential applications for energy ***,various classifications of the FIV effect for energy harvesting are briefly introduced,such as vortex-induced vibration(VIV),galloping,flutter,and wake-induced vibration(WIV).Next,the development of FIV energy harvesting techniques is reviewed to discuss the research works in the past three *** application of hybrid FIV energy harvesting techniques that can enhance the harvesting performance is also ***,the nonlinear designs of FIV-based energy harvesters are reported in this study,e.g.,multi-stability and limit-cycle oscillation(LCO)***,advanced FIV-based energy harvesting studies for fluid engineering applications are briefly ***,conclusions and future outlook are summarized.

关键词： vibration-driven energy harvesting flow-induced vibration(FIV) piezoelectric approach nonlinear design

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On the role of friction of triboelectric effect on nonlinear tri-hybrid vibration-based energy harvesting

On the role of friction of triboelectric effect on nonlinear...

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第十九届全国非线性振动暨第十六届全国非线性动力学和运动稳定性学术会议（NVND2023）

作者： J.M.Wang s.k.lai Department of Civil and Environmental Engineering The Hong Kong Polytechnic University

Advances in low-power integrated circuits, wireless communication and mobile electronic technology in recent decades have led to a greatly increasing requirement for vibration energy harvesting technology. Piezoelectric and electromagnetic energy harvesters are the two most common types and have been studied extensively.. Triboelectric energy harvesting, as a relatively new energy harvesting technique, has attracted much attention due to its simple fabrication, light weight, cost-effectiveness, and a wide variety of potential applications. This work presents a new sliding-mode tribe-electromagnetic-piezoelectric energy harvester in the form of a cantilever beam with a tip mass that is acted upon by both magnetic and friction forces. This is the first study of the impact of the sliding-mode hybrid energy harvesting approach from an experimental aspect. A comparison of the open circuit of piezoelectric and electromagnet energy harvest units between with and without triboelectric impact suggests that the friction force cannot be ignored, which makes the without-friction impact model preferable in the dynamical analysis. Additionally, a magnetic field that induces tri-stability is present. Hybrid harvest modes can greatly improve output efficiency compared to a single energy collection method with a cantilever system. Implementing the strategy of tri-stable nonlinear behavior, shallower potential wells of the dynamical system can be achieved by adjusting the interaction between the outer fixed magnets and the beam tip magnet. It is found that the distribution of the tri-stability changes when friction is involved, and the output of tri-stability shrink at low acceleration. The experiment results show that the system displays the highest output intra-well oscillation under 5 Hz. Compared to the open circuit voltage output under the excitation with 3-5 Hz, friction has less influence at 6-7 Hz. Meanwhile, with the fiction effect, the single coil harvest unit, one side pie

关键词： low-frequency excitation friction effect hybrid energy harvesting magnetic multistability

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Computational Fluid Dynamics study of a Cardiovascular Disease:Thoracic Aortic Dissection

Computational Fluid Dynamics Study of a Cardiovascular Disea...

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The 16th Annual Conference of Hong kong society of Theoretical and Applied Mechanics 2012、The 1st Mainland-Hong kong Youth Forum on Mechanics 2012、The 8th shanghai-Hong kong Forum on Mechanics and Its Application 2012

作者： Y.s.Tang s.k.lai stephen W.k.Cheng k.W.Chow Department of Mechanical Engineering the University of Hong Kong Department of surgery the University of Hong Kong

An aortic dissection occurs when blood intrudes into the layers of the vascular wall, creating an artificial *** is a severe pathological situation,since the weakened vessel wall may expand and be subject to the risk of rupture and massive internal bleeding,resulting in high *** is believed that biomechanical factors would play a role in this disease condition. Endovascular repair has now become a frequently employed practice in the clinical treatment and management.A stent graft is deployed to cover the tears and restrict the flow from entering the artificial *** this study,computational fluid dynamics analysis is performed to study the hemodynamics of a dissected aorta(Fig.1).simplified aortic geometries with realistic dimensions are *** velocity and pressure waveforms are prescribed at the inlet and outlet respectively. Blood flow configuration and biomechanical forces are ***-operation and post-operation conditions are also *** quantitative analysis can provide valuable information for clinicians to making therapeutic decision.

关键词： Computational Fluid Dynamics study of a Cardiovascular Disease:Thoracic Aortic Dissection

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简约之美——新款雷诺风景音响改装

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汽车杂志 2005年第11期 204-205页

作者： s.k.lai 徐雨

也许你现在并未察觉，实际上，汽车音响已经成为我们很多人生活的一部分。在茫茫人海中，在漫漫人生中，无数个日夜，从早到晚，我们辛勤的工作，我们平凡的生活，当然，我们也有执着的追求。我们这帮人，因为汽车音乐相识相知相交，因... 详细信息

也许你现在并未察觉，实际上，汽车音响已经成为我们很多人生活的一部分。在茫茫人海中，在漫漫人生中，无数个日夜，从早到晚，我们辛勤的工作，我们平凡的生活，当然，我们也有执着的追求。我们这帮人，因为汽车音乐相识相知相交，因为汽车音乐欣喜畅快淡定。

关键词：音响改装风景雷诺简约汽车音响生活音乐

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A Computational Fluid Dynamics study on the Endovascular Treatment of Intracranial Aneurysms

A Computational Fluid Dynamics Study on the Endovascular Tre...

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作者： s.k.lai Abraham Y.s.Tang k.M.Leung Gilberto k.k.Leung k.W.Chow Department of Mechanical Engineering University of Hong Kong Division of Neurosurgery Department of SurgeryLi Ka Shing Faculty of MedicineUniversity of Hong KongQueen Mary Hospital

Intracranial aneurysm,a localized dilation of arterial blood vessels in the brain,is a severe cerebrovascular *** appropriate medical treatment,the rupture of intracranial aneurysms will result in high mortality rate due to excessive bleeding into the cavity surrounding the *** modern technological advances,endovascular stenting technique has now proven to be one effective technique in the clinical management of intracranial *** prime advantage of endovascular intervention over traditional open surgery is that the former procedure is less invasive,and thus a shorter recovery time will *** a mechanical point of view,a metallic stent,serving as a flow diverter,can be deployed to cover the entire aneurysm *** the blood flow inside the aneurysmal sac becomes stagnant,and thrombus formation is likely to *** is expected that a larger extent of thrombosis is capable of reducing the risk of growth and rupture of *** assess this clinical objective quantitatively,we construct a three-dimensional(3D) aneurysm model (see Fig.1) to investigate the blood flow patterns in stented and non-stented *** many idealized models with straight or curved parent blood vessel,the aneurysm of the current model is placed at the bifurcation point of cerebral arteries,a geometric configuration occurring frequently for many *** fluid dynamics techniques are applied to perform the blood flow *** inlet and outlet boundary conditions of this model are subjected to pulsatile velocity and pressure waveforms *** on the present study,the impact of hemodynamic and biomechanical factors on the aneurysm can be *** quantitative findings can also provide valuable information for clinical practitioners to understand and predict the hemodynamic behaviour in patient-specific cases.

关键词： A Computational Fluid Dynamics study on the Endovascular Treatment of Intracranial Aneurysms

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大豆芽疫病抗性资源的鉴定

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国外作物育种 2004年第4期23卷 60-60页

作者： s.k.lai 向平

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Pathogenesis, diagnosis, and treatment of epilepsy: electromagnetic stimulation-mediated neuromodulation therapy and new technologies

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Neural Regeneration Research 2025年第4期20卷 917-935页

作者： Dian Jiao lai Xu Zhen Gu Hua Yan Dingding shen Xiaosong Gu Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina key Laboratory of Advanced Drug Delivery systems of Zhejiang Province College of Pharmaceutical SciencesZhejiang UniversityHangzhouZhejiang ProvinceChina Affiliated Hospital of Nantong University NantongJiangsu ProvinceChina

Epilepsy is a severe,relapsing,and multifactorial neurological *** regarding the accurate diagnosis,prognosis,and in-depth pathogenesis are crucial for the precise and effective treatment of *** pathogenesis of epilepsy is complex and involves alterations in variables such as gene expression,protein expression,ion channel activity,energy metabolites,and gut microbiota *** results are lacking for conventional treatments for *** resection of lesions,drug therapy,and non-drug interventions are mainly used in clinical practice to treat pain associated with ***-pharmacological treatments,such as a ketogenic diet,gene therapy for nerve regeneration,and neural regulation,are currently areas of research *** review provides a comprehensive overview of the pathogenesis,diagnostic methods,and treatments of *** also elaborates on the theoretical basis,treatment modes,and effects of invasive nerve stimulation in neurotherapy,including percutaneous vagus nerve stimulation,deep brain electrical stimulation,repetitive nerve electrical stimulation,in addition to non-invasive transcranial magnetic stimulation and transcranial direct current *** studies have shown that electromagnetic stimulation-mediated neuromodulation therapy can markedly improve neurological function and reduce the frequency of epileptic ***,many new technologies for the diagnosis and treatment of epilepsy are being ***,current research is mainly focused on analyzing patients’clinical manifestations and exploring relevant diagnostic and treatment methods to study the pathogenesis at a molecular level,which has led to a lack of consensus regarding the mechanisms related to the disease.

关键词： diagnosis drug treatment electroencephalography epilepsy monitoring epilepsy nerve regeneration neurostimulation non-drug interventions pathogenesis prediction

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Nucleoside modified mRNA-lipid nanoparticles as a new delivery platform for the repair of the injured spinal cord

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Neural Regeneration Research 2025年第8期20卷 2311-2312页

作者： krisztián Pajer Tamás Bellák Antal Nógrádi Department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary

spinal cord injury and treatment opportunities:The adult mammalian spinal cord has a very limited capacity for spontaneous regeneration due to various intrinsic molecular and cellular *** the spinal cord neurons have the capacity to regenerate their axons,the expression of growth inhibitory factors,lack or suppression of proper guidance cues,and profound inflammatory responses do not permit successful regeneration(khyeam et al.,2021).

关键词： injured capacity modified

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Meningeal lymphatic vessel crosstalk with central nervous system immune cells in aging and neurodegenerative diseases

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Neural Regeneration Research 2025年第3期20卷 763-778页

作者： Minghuang Gao Xinyue Wang shijie su Weicheng Feng Yaona lai kongli Huang Dandan Cao Qi Wang science and Technology Innovation Center Guangzhou University of Chinese MedicineGuangzhouGuangdong ProvinceChina Institute of Clinical Pharmacology Guangzhou University of Chinese MedicineGuangzhouGuangdong ProvinceChina The sixth Affiliated Hospital Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Meningeal lymphatic vessels form a relationship between the nervous system and periphery, which is relevant in both health and disease. Meningeal lymphatic vessels not only play a key role in the drainage of brain metabolites but also contribute to antigen delivery and immune cell activation. The advent of novel genomic technologies has enabled rapid progress in the characterization of myeloid and lymphoid cells and their interactions with meningeal lymphatic vessels within the central nervous system. In this review, we provide an overview of the multifaceted roles of meningeal lymphatic vessels within the context of the central nervous system immune network, highlighting recent discoveries on the immunological niche provided by meningeal lymphatic vessels. Furthermore, we delve into the mechanisms of crosstalk between meningeal lymphatic vessels and immune cells in the central nervous system under both homeostatic conditions and neurodegenerative diseases, discussing how these interactions shape the pathological outcomes. Regulation of meningeal lymphatic vessel function and structure can influence lymphatic drainage, cerebrospinal fluid-borne immune modulators, and immune cell populations in aging and neurodegenerative disorders, thereby playing a key role in shaping meningeal and brain parenchyma immunity.

关键词： central nervous system meningeal lymphatic vessels immunity myeloid cells lymphatic cells neurodegenerative disease

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structural Modal Parameter Recognition and Related Damage Identification Methods under Environmental Excitations: A Review

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structural Durability & Health Monitoring 2025年第1期19卷 25-54页

作者： Chao Zhang shang-Xi lai Hua-Ping Wang school of Civil Engineering and Mechanics Lanzhou UniversityLanzhou730000China key Laboratory of special Functional Materials and structural Design Ministry of EducationLanzhou UniversityLanzhou730000China

Modal parameters can accurately characterize the structural dynamic properties and assess the physical state of the ***,it is particularly signiﬁcant to identify the structural modal parameters according to the monitoring data information in the structural health monitoring(sHM)system,so as to provide a scientiﬁc basis for structural damage identiﬁcation and dynamic model modiﬁ*** view of this,this paper reviews methods for identifying structural modal parameters under environmental excitation and brieﬂy describes how to identify structural damages based on the derived modal *** paper primarily introduces data-driven modal parameter recognition methods(e.g.,time-domain,frequency-domain,and time-frequency-domain methods,etc.),brieﬂy describes damage identiﬁcation methods based on the variations of modal parameters(e.g.,natural frequency,modal shapes,and curvature modal shapes,etc.)and modal validation methods(e.g.,stability Diagram and Modal Assurance Criterion,etc.).The current status of the application of artiﬁcial intelligence(AI)methods in the direction of modal parameter recognition and damage identiﬁcation is further *** on the pre-vious analysis,the main development trends of structural modal parameter recognition and damage identiﬁcation methods are given to provide scientiﬁc references for the optimized design and functional upgrading of sHM systems.

关键词： structural health monitoring data information modal parameters damage identiﬁcation AI method

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