Microsystem Technologies最新文献_第3页

Second law analysis: electrically actuated flow of non-Newtonian fluids in wavy microchannels 第二定律分析：非牛顿流体在波浪形微通道中的电驱动流动

Microsystem Technologies Pub Date : 2024-08-19 DOI: 10.1007/s00542-024-05744-6

Sumit Kumar Mehta, Prasenjeet Padhi, Somchai Wongwises, Pranab Kumar Mondal

{"title":"Second law analysis: electrically actuated flow of non-Newtonian fluids in wavy microchannels","authors":"Sumit Kumar Mehta, Prasenjeet Padhi, Somchai Wongwises, Pranab Kumar Mondal","doi":"10.1007/s00542-024-05744-6","DOIUrl":"https://doi.org/10.1007/s00542-024-05744-6","url":null,"abstract":"We examined the energy production assessment for heat flow of non-Newtonian ionic liquids within a wavy microchannel, considering the impact of finite ionic size and electroosmotic actuation induced by the applied electric field. A numerical method based on the finite element approach was utilized to determine the associated flow, electrical-double layer potential, and temperature fields. The current model was validated against existing theoretical results. Entropy production, including viscous, thermal, Joule, and total entropy generation within the wavy microchannel, was explored by varying the Brinkman number, thermal Peclet number, steric factor for finite ionic size, Carreau number, and dimensionless amplitude. Increasing the Carreau number resulted in higher shear-thinning behavior of the liquid, leading to higher total entropy generation. Conversely, an increase in finite ionic size reduced entropy generation. Entropy generation decreased with increasing amplitude of the wavy wall. Notably, compared to the plane channel, wavy microchannels consistently exhibited reduced entropy generation. The insights gained from this study are relevant to the development of efficient heat-exchanging devices for electronic cooling.","PeriodicalId":18544,"journal":{"name":"Microsystem Technologies","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142184212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parametric resonances of buckled magneto-electro-thermo-elastic laminated microbeams based on modified couple stress theory 基于修正耦合应力理论的屈曲磁电热弹性层压微梁参数共振

Microsystem Technologies Pub Date : 2024-08-17 DOI: 10.1007/s00542-024-05728-6

Yu-fang Zheng, Li-chuan Liu, De-yong Qu, Chang-ping Chen

引用次数: 0

Design of a novel CMOS instrumentation amplifier using 90 nm technology 利用 90 纳米技术设计新型 CMOS 仪表放大器

Microsystem Technologies Pub Date : 2024-08-17 DOI: 10.1007/s00542-024-05739-3

Divya Sharma, Vijay Nath

引用次数: 0

Improvement of stability on dc microgrid using dual series virtual impedance based fuzzy controller under variation of constant power load 在恒定功率负荷变化下使用基于双串联虚拟阻抗的模糊控制器提高直流微电网的稳定性

Microsystem Technologies Pub Date : 2024-08-16 DOI: 10.1007/s00542-024-05747-3

Mukh Raj Yadav, Navdeep Singh

{"title":"Improvement of stability on dc microgrid using dual series virtual impedance based fuzzy controller under variation of constant power load","authors":"Mukh Raj Yadav, Navdeep Singh","doi":"10.1007/s00542-024-05747-3","DOIUrl":"https://doi.org/10.1007/s00542-024-05747-3","url":null,"abstract":"This paper investigates the stability issue in direct current microgrid (DC MGs) due to linear and nonlinear constant power load (CPL). The deterioration can be damped out by inserting virtual resistances to minimize the impact of negative resistance of the CPL. However, large virtual resistances caused low stability region. This paper proposed a dual series virtual impedance with fuzzy logic-based voltage and current feed-forward controller. The dual series virtual impedance and fuzzy logic (FL) are used for improvement of transient behavior and steady-state error. However, the crossover frequency increased by inserting CPL is minimized but not much improved by virtual impedance controller. A fuzzy logic-based voltage and current feedforward controller moves from instable to stable region. With FL based current feedforward controller, the crossover frequency has been minimized from 454 rad/sec to 23.8 rad/sec for 5 kW load. The feedforward current can not only improve the transient response but also mitigate the crossover frequency for small-signal modelling stability of microgrids. The comparative stability and transient performance have been demonstrated for variation of CPL (5–9 kW) and source. The hardware prototypes and simulation analysis are used to validate the proposed stable operation criteria of the DC microgrid.","PeriodicalId":18544,"journal":{"name":"Microsystem Technologies","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142184213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Techno-economic analysis and operational challenges of a standalone integrated renewable energy system 独立综合可再生能源系统的技术经济分析和运行挑战

Microsystem Technologies Pub Date : 2024-08-16 DOI: 10.1007/s00542-024-05745-5

Vishal Saini, S. K. Singal

{"title":"Techno-economic analysis and operational challenges of a standalone integrated renewable energy system","authors":"Vishal Saini, S. K. Singal","doi":"10.1007/s00542-024-05745-5","DOIUrl":"https://doi.org/10.1007/s00542-024-05745-5","url":null,"abstract":"This paper presents a comprehensive analysis of a stand-alone integrated renewable energy system (IRES) for addressing the technical, economic, and operational challenges. In the context, different renewable resource based three configurations viz: SPV/BES, HPP/SPV/BES, and BGG/HPP/SPV/BES are compared in terms of life cycle cost (LCC) and cost of energy (COE) at 0% loss of power supply probability (LPSP). The system is coded in MATLAB© environment for optimal sizing and economic analysis. The findings suggest that the BGG/HPP/SPV/BES configuration provides the most cost-effective results, showcasing a total LCC of $917,000 and COE of 0.22 $/kWh. In response to technical and operational challenges, particularly those related to load frequency control, a MATLAB/Simulink model of optimal configuration is developed. Introducing a fuzzy logic controller tuned proportional integral derivative (FL-PID) controller, aiming to sustain equilibrium in active power, stable DC bus voltage, consistent output AC voltage, effectively managing fluctuations in solar radiation and load demand. These findings provide vital insights for the successful design and implementation of IRESs.","PeriodicalId":18544,"journal":{"name":"Microsystem Technologies","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142184211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vision transformer-based model for early detection of dysgraphia among school students 基于视觉转换器的小学生书写障碍早期检测模型

Microsystem Technologies Pub Date : 2024-08-12 DOI: 10.1007/s00542-024-05741-9

Prateek Sharma, Basant Agarwal, Gyan Singh Yadav, Sonal Jain

{"title":"Vision transformer-based model for early detection of dysgraphia among school students","authors":"Prateek Sharma, Basant Agarwal, Gyan Singh Yadav, Sonal Jain","doi":"10.1007/s00542-024-05741-9","DOIUrl":"https://doi.org/10.1007/s00542-024-05741-9","url":null,"abstract":"Learning disorders, an umbrella term for a range of learning difficulties, impair a person's capacity to learn new skills. Dysgraphia is one of the prevalent learning disorders among children all over the globe. It is defined as a child's functional restriction in establishing accurate letter or word construction, inadequate speed, and readability of written text. Lack of availability of experts who can diagnose and high diagnostic cost, makes it important to discover a diagnostic approach for dysgraphia that is accurate, accessible and simple to use. Analyzing handwriting is the most common technique to detect dysgraphia which can be automated through image processing techniques. The use of deep learning algorithms has become increasingly widespread in image processing over the course of the last few decades and analysis. However, the effective classification of these handwritten images presents a number of challenges like low accuracy, inadequate availability of labelled data for training purposes. Considering the notable efficacy demonstrated by the Vision Transformer (ViT) in image classification, we proposed a ViT-based classification model in this paper. This model splits handwriting images into patches and then process those through a transformer. Just like word embedding, these input image patches are passed in a sequence to the transformer. To compare performance of proposed model, we also applied transfer learning techniques VGG16, VGG19, ResNet50 and InceptionV3. After comparing the results, it was found that Vision Transformers are best suitable for the classification. Vision transformer has outperformed with macro average F1 score value of 0.92 for the classification. Out of all pretrained models VGG16 performed best with the macro average F1 score value of 0.90. The findings of this study indicate that ViT-based model has the potential to assist experts in the early detection of dysgraphia.","PeriodicalId":18544,"journal":{"name":"Microsystem Technologies","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142184241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a piezoelectric resonator with in-plane displacement-amplification mechanism 开发具有平面内位移放大机制的压电谐振器

Microsystem Technologies Pub Date : 2024-08-12 DOI: 10.1007/s00542-024-05743-7

Mengying Zhang, Quanliang Zhao, Zhongxiang Li, Siyun Wang, Guangping He, Lei Zhao

{"title":"Development of a piezoelectric resonator with in-plane displacement-amplification mechanism","authors":"Mengying Zhang, Quanliang Zhao, Zhongxiang Li, Siyun Wang, Guangping He, Lei Zhao","doi":"10.1007/s00542-024-05743-7","DOIUrl":"https://doi.org/10.1007/s00542-024-05743-7","url":null,"abstract":"A piezoelectric in-plane resonator with symmetrical oblique-beam amplification mechanism was analyzed and developed. The resonator is comprised of a piezoelectric-heterogeneous-bimorph beam in the middle and elastic oblique beams symmetrically distributed on both sides. Firstly, analytical model for its in-plan deformation was derived by combining elastic deformation of the oblique beams with electrostriction bending of the piezoelectric beam. Then geometric parameters of the whole structure were optimized mainly based on the analytical model to obtain the maximum output horizontal displacement. Besides, its finite element model was simulated and analyzed to verify the analytical model, and find the optimal operating mode, at which the significant amplified horizontal displacement is generated with suppressed vertical one. The resonator was fabricated on a SOI wafer with deposited PNZT piezoelectric film. The fabricated resonator was characterized and tested. Its optimal operating mode was verified and the operating frequency was measured as 16.57 kHz with in-plan displacement of 7.71 μm under 20Vp-p driving signal. The device obtained significant in-plane resonance with almost no out-of-plane displacement.","PeriodicalId":18544,"journal":{"name":"Microsystem Technologies","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A compact parallel dispensing machine of high-viscous adhesive based on electrostatic-induced mechanism 基于静电诱导机制的紧凑型高粘度粘合剂平行点胶机

Microsystem Technologies Pub Date : 2024-08-08 DOI: 10.1007/s00542-024-05737-5

Zheng Xu, Yuanchun Liu, Zhongping Sun, Jiaqi Zhang, Xiaodong Wang, Xiaoyu Xu

引用次数: 0

Analysis of a low frequency MEMS capacitive accelerometer under the effect of biasing voltage for detection of Parkinsons tremor 分析偏置电压作用下的低频 MEMS 电容式加速度计，以检测帕金森氏震颤

Microsystem Technologies Pub Date : 2024-08-08 DOI: 10.1007/s00542-024-05735-7

M. Preeti, Koushik Guha, K. L. Baishnab, J. Iannacci, Massimo Donelli, Narayan Krishnaswamy

引用次数: 0

Active integrated fabrication method and evaluation of polymer with microneedles LED light source integration 聚合物与微针 LED 光源集成的主动集成制造方法和评估

Microsystem Technologies Pub Date : 2024-08-06 DOI: 10.1007/s00542-024-05731-x

Xiaoning Zhang, Qingxin Han, Xiaoqing Hu, Lei Zhang, Xiaoya Kang, Ming Li, Qiang Gao, Fengyi Liu, Jingyao Sun, Jingxian Zhu, Jian Zhuang

{"title":"Active integrated fabrication method and evaluation of polymer with microneedles LED light source integration","authors":"Xiaoning Zhang, Qingxin Han, Xiaoqing Hu, Lei Zhang, Xiaoya Kang, Ming Li, Qiang Gao, Fengyi Liu, Jingyao Sun, Jingxian Zhu, Jian Zhuang","doi":"10.1007/s00542-024-05731-x","DOIUrl":"https://doi.org/10.1007/s00542-024-05731-x","url":null,"abstract":"This article proposes a new process for fabricating a polymer microneedles (MNs) patch integrated with an LED light source (LED-HEMA/MN, LH-MN) using ultraviolet (UV) curing technology. Hydroxyethyl methacrylate (HEMA) is used as the base material, with a focus on studying the active integrated fabrication process of the MNs patch. The study also investigates the morphology, size, mechanical properties, ex vivo skin penetration performance, operating temperature, and performance optimization of the LH-MN. The experimental results show that the LH-MN fabricated using the optimal process has a good appearance, high molding rate, short production cycle, and excellent mechanical properties. It can effectively penetrate the skin without the risk of thermal injury. In addition, the MNs patch (LED-HEMA/HEA-MN, LHH-MN) prepared by optimizing and modifying with hydroxyethyl acrylate (HEA) possesses good flexibility and mechanical properties. It can adapt to different shapes and locations of the affected area, greatly enhancing the practicality of the MNs.","PeriodicalId":18544,"journal":{"name":"Microsystem Technologies","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0