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Communication, Image and Signal Processing (CCISP), International Conference on

作者： Xuan Yu Mingju Xin Kai Lin Jiajin Li Kaizhuo Chen Shijie Deng School of Optoelectronic Engineering Guilin University of Electronic Technology Guilin China

This paper presents an optical receiver designed to match multiple core optical fiber, implemented in a 0.18 $\mu\mathrm{m}$ CMOS process. The chip consists of a photodiode (PD) array and transimpedance (TIA) circuits, including the TIA core, Bandgap (BG) and Bias. The placement of PD array is highly matched with the multiple core optical fiber and each PD is followed by a TIA. The TIA achieves a 60 dB ohm transimpedance gain with a 200 MHz bandwidth and the input reference current noise is $7.2 \text{pA} / \sqrt{ } \text{Hz}$ . The BG can stably output a 1.2 v voltage and shows a good stability in the post simulation under 128 process corners. The Bias can provide the current required to drive TIA through a mirror transistor. Eye diagrams are shown when operating at bit rates of 200 M bps and 300 M bps with a forward input reference voltage of 1.2 v. While achieving high transmission efficiency, the chip area is only $0.78\times 0.92$ mm2 which allows for more compact designs and suit for a wide range of application scenarios.

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基于超构透镜的实验力学测试技术初探

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力学学报 2025年第2期57卷 349-360页

作者：张炜赵洲嵇煜曾飞陈沐谷施圣贤上海交通大学机械与动力工程学院上海200240 中国航发湖南动力机械研究所湖南株洲412002 香港城市大学电机工程系中国香港999077

超构透镜是一种新兴的平面纳米光学元件,具有超薄、超轻的显著优点以及对入射光高度灵活的调控能力,正逐步展现出替代传统光学透镜的潜质.当前,有关超构透镜的研究集中于其光学性能提升及超材料迭代等,鲜有研究尝试将超构透镜应用于传... 详细信息

超构透镜是一种新兴的平面纳米光学元件,具有超薄、超轻的显著优点以及对入射光高度灵活的调控能力,正逐步展现出替代传统光学透镜的潜质.当前,有关超构透镜的研究集中于其光学性能提升及超材料迭代等,鲜有研究尝试将超构透镜应用于传统力学测试领域,且超构透镜在先进光学诊断技术中的应用前景尚不明确.文章据此分别介绍了基于自主设计的双目超构透镜的粒子图像测速技术(Meta-PIv)以及数字图像相关技术(Meta-DIC)及其前期研究结论,并分别开展了实验验证,结果表明:经雷诺数为2000的涡环实验验证,所提出的双目超构透镜PIv系统可以实现2D-3C速度场的测量,并具有时间分辨的流动分析能力.涡环验证实验中,Meta-PIv系统对涡环直径的测量误差约为1.25%;基于双目超构透镜的DIC测试系统可以实现对目标X,Y和Z三方向的位移与应变场测量,测量精度与传统Stereo-DIC系统相比误差低于10%,且在Y方向测量误差低于1%.涉及的研究工作旨在为超构透镜在力学测试领域的应用提供新思路,并为后续研究提供参考数据.

关键词：超构透镜粒子图像测速数字图像相关光场成像三维测量

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Realization and Performance Analysis of Hybrid DC Microgrid

Realization and Performance Analysis of Hybrid DC Microgrid

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International Conference on Electrical Energy Systems (ICEES)

作者： Akhil S Chandran v. Ravikumar Pandi Department of Electrical and Electronics Engineering Amrita Vishwa Vidyapeetham Amritapuri India

ISBN: (数字)9798350353778

ISBN: (纸本)9798350353785

More advanced microgrid designs must be created to handle the current energy situation and offer reliable and sustainable power sources. This study focuses on the droop and ANN-based design and modeling to improve the dependability and efficiency of a Direct current Hybrid Microgrid. Several power sources and storage methods must be integrated. A 12kW solar photovoltaic system, a 6.4kW fuel cell system (PEMFC), a 2.4kWh lithium battery pack, two 25-ohm static resistive loads, and one 30-ohm dynamic resistive load are all part of the suggested grid architecture. The project's outcomes will clarify the application and assessment of hybrid DC microgrids, providing a foundation for further developments in resilient and eco-friendly energy systems. We can generate substantial amounts of power and energy while prioritizing environmental conservation and the preservation of our natural resources by strategically and creatively combining different sustainable energy sources. The goal of this effort is to accelerate the current and future use of large-scale, sustainable power that is based on infrastructure

关键词： Power supplies Power system dynamics Fuel cells Microgrids Artificial neural networks Power system stability Hybrid power systems Batteries Power system reliability voltage control

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design and Modeling of Perovskite-Based Solar Cells and Photodetectors with the Hybrid Heterostructure of SnO2/CH3NH3PbI3/NiO Thin films

Design and Modeling of Perovskite-Based Solar Cells and Phot...

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Smart Technologies, Communication and Robotics (STCR)

作者： Mallina venkata Sanjana Kosuru Prasanna Muvva Ranjith Kumar Rai Raviteja Palepu Ashok Electronics and Communication Engineering Vignan’s Lara Institute of Technology and Science Vadlamudi India

ISBN: (数字)9798350357530

ISBN: (纸本)9798350357547

Perovskite solar cells (PSCs) have shown high optical absorption and provide high conversion efficiency with stable performance. The use of this perovskite as the active layer of photodetectors shows improved recognition and stability by converting light radiation impulses into electrical signals, thereby finding applications in scientific research, as well as military and civic domains. In this work, we model the SnO 2 /CH 3 NH 3 PbI 3 /NiO structure using SCAPS-1D software. A comprehensive analysis was performed for important SC parameters such as power conversion efficiency (PCE), fill factor (FF), open circuit voltage (v oc ), short circuit current (J sc ), and external quantum efficiency (EQE) by taking into account layer thickness and defect density. The obtained results indicate that by optimizing the device parameters, we have achieved a maximum simulated conversion efficiency of 27.72% with open circuit voltage (v oc ) = 1.27 v, short circuit current (J sc ) = 26.01 mA/cm 2 , fill factor (FF) = 83.4% under AM1.5G illumination. The External Quantum Efficiency can be observed respectively under an illumination of white ***.

关键词： Fill factor (solar cell) Photovoltaic cells Short-circuit currents Lighting voltage Photodetectors Perovskites Stability analysis Power conversion Integrated circuit modeling

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Conceptual design of Ukrainian Reusable Single-Stage Rocket with vertical Takeoff & Landing Capability 11

Conceptual Design of Ukrainian Reusable Single-Stage Rocket ...

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2020 11th Asia Conference on Mechanical and Aerospace engineering, ACMAE 2020

作者： Lukin, K.A. Prisiazhnyi, v.I. Mitikov, Y.A. Levenko, A.S. Lukin, S.K. Pauk, O.L. Kharkov Ukraine Kyiv Ukraine Oles Honchar Dnipro National University Dnipro Ukraine Dnipro Ukraine

In the paper we briefly describe conceptual design of Ukrainian reusable single-stage rocket demonstrator. The main objective consists in design, development and trials of a series of 'Grasshopper' demonstrators equipped with both the jet propulsion engine set and microwave/optical vision and measurement systems for the performing and control of its soft landing at the starting point. The greatest advantages of our design consist in availability of the results of previous developments of rocket engines and guiding systems for 'Yuzhmash' space ships, as well as advanced technique for real-time microwave 3D imaging using random/noise signals and MIMO1 radar operation mode with FPGA2-based signal processing. © Published under licence by IOP Publishing Ltd.

关键词： Conceptual design

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Microstructure and tensile behaviour of B4C particles reinforced Al6061 matrix composites 3

Microstructure and tensile behaviour of B4C particles reinfo...

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3rd International Conference on Smart and Sustainable developments in Materials, Manufacturing and Energy engineering (SME)

作者： Kavitha, T. N. Auradi, v. Rajesh, G. L. Bharath, v. Kumar, S. Mahendra Nagaral, Madeva Siddaganga Inst Technol Dept Mech Engn Tumakuru 572103 Karnataka India RV Coll Engn Dept Mech Engn Mysuru Rd Bangalore 560059 Karnataka India Hindustan Aeronaut Ltd Aircraft Res & Design Ctr Bangalore 560037 Karnataka India

In an ongoing work an exertion is made to get fabrication of aluminium 6061 matrix composites reinforced with 8 mm average size of 7 wt% B4C particulates of with two stage melt stirring fabrication technic and are examined under scanning electron microscopy, Energy Dispersive X-ray Spectroscopy, and X-ray diffractometer to characterize the surface morphology, chemical elements and its percentage of distribution in addition to phase elements of composites. Then evaluation of prepared composite for Hardness and Tensile properties using micro hardness testing machine and UTM machine at room temperature are carried as per ASTM standards and found that Al6061-7 wt% B4Cp composite material's hardness, Yield stress and ultimate tensile strength are magnified by 24.15%, 15.17% and 23.577% respectively while percentage of elongation is sink by 39.07% as compare to Al60610 alloy. Finally, the tensile facture surface was examined for micro mechanisms of failure and its surface morphology stipulates ductile kind of fracture and frail interface leading to facture mechanism. Copyright (C)& nbsp;2022 Elsevier Ltd. All rights reserved.& nbsp

关键词： Al6061 alloy B4C Microstructure Tensile properties Hardness Energy dispersive spectroscopy

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design of Low-Power High-Gain Transimpedance Amplifier

Design of Low-Power High-Gain Transimpedance Amplifier

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International Conference on Smart Systems and Inventive Technology (ICSSIT)

作者： Ravi Ranjan Kumar Supriya Sharma Kulbhushan Sharma Avinash Sharma VLSI Centre of Excellence Chitkara University Institute of Engineering and Technology Chitkara University Punjab India Dept. of CSE MM Engg.College Maharishi Markandeshwar(Deemed to be University) Mullana Haryana India

High-gain and low-power operation is prime requirement of transimpedance amplifier(TIA) for low current sensing applications. However, achieving high gain of TIA is crucial task using CMOS devices owing to limitation of noisepower budget. This research study has proposed an integrator-differentiator based TIA targeted for nano-pore current sensing which is implemented in 0.18 $\mu$m technology. The proposed circuit emulates a gain of 184.17 dB$\Omega$, input referred current noise of5.79 nA, bandwidth of10.18 kHz and power dissipation of S7.30 $\mu$W at ± 0.9 v. The proposed TIA can also be used in various other applications like spectroscopy, electrophysiology and optical fiber communication.

关键词： optical fiber amplifiers Temperature sensors Spectroscopy Microwave integrated circuits Microwave communication Microwave circuits optical fiber communication

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Self-Powered Intelligent Liquid Crystal Attenuator for Metasurface Real-Time Modulating

SSRN

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SSRN 2024年

作者： Li, Xiuhan Niu, Zihao Yang, Jiayi Yu, Gang Wang, Meiqi Hong, Keke Zhu, Xiaopeng Mao, Xu School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China

Triboelectric Nanogenerator (TENG) is capable of efficiently capturing mechanical energy and transforming it into electrical energy for self-powered systems, making it an ideal power source for Polymer Dispersed Liquid Crystal (PDLC). Herein, a Self-powered Intelligent Liquid Crystal Attenuator (SPILCA) is demonstrated for metasurface real-time modulating. The convergent beam-shaping metasurface consisting of holey meta-atoms with diameters ranging from 100 nm to 300 nm is fabricated by e-beam lithography (EBL). While the unique optical characteristics of the metasurface can be modulated within a certain frequency range, the E7 Liquid Crystal (E7-LC) has a large index of birefringence, and it can be powered by TENG to switch between two optical response states. Therefore, the combination of metasurface and SPILCA can achieve real-time control of metasurface by using the electricity regulatory of LC and the electromagnetic response of the metasurface. In order to build this SPILCA for metasurface modulating, a vertically contact-separated TENG based on Nylon electrospun film as triboelectric material is proposed. The maximum values of the open-circuit voltage, short-circuit current, transferred charge are 165 v, 25 µA, and 86 nC, respectively. By measuring the optical power and testing the modulation effect of SPILCA on the metasurface, it can be seen that the SPILCA has a good modulation effect on the optical signal, and even can reach 96% intensity modulation when the laser source wavelength is 450 nm and the current is 0.09 A. This self-powered photoelectric response device does not require additional electrical power supply, and has great potential in future smart optical system design. © 2024, The Authors. All rights reserved.

关键词： Nanogenerators

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Electrospun Nanomaterials Based on Cellulose and Its Derivatives for Cell Cultures: Recent developments and Challenges

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POLYMERS 2023年第5期15卷 1174-1174页

作者： Peranidze, Kristina Safronova, Tatiana v. Kildeeva, Nataliya R. Lomonosov Moscow State Univ Dept Mat Sci Leninskie Gory 1Bldg 73 Moscow 119991 Russia Lomonosov Moscow State Univ Dept Chem Leninskie Gory 1Bldg 3 Moscow 119991 Russia Kosygin State Univ Russia Dept Chem & Technol Polymer Mat & Nanocomposites Malaya Kaluzhskaya 1 Moscow 119071 Russia

The development of electrospun nanofibers based on cellulose and its derivatives is an inalienable task of modern materials science branches related to biomedical engineering. The considerable compatibility with multiple cell lines and capability to form unaligned nanofibrous frameworks help reproduce the properties of natural extracellular matrix and ensure scaffold applications as cell carriers promoting substantial cell adhesion, growth, and proliferation. In this paper, we are focusing on the structural features of cellulose itself and electrospun cellulosic fibers, including fiber diameter, spacing, and alignment responsible for facilitated cell capture. The study emphasizes the role of the most frequently discussed cellulose derivatives (cellulose acetate, carboxymethylcellulose, hydroxypropyl cellulose, etc.) and composites in scaffolding and cell culturing. The key issues of the electrospinning technique in scaffold design and insufficient micromechanics assessment are discussed. Based on recent studies aiming at the fabrication of artificial 2D and 3D nanofiber matrices, the current research provides the applicability assessment of the scaffolds toward osteoblasts (hFOB line), fibroblastic (NIH/3T3, HDF, HFF-1, L929 lines), endothelial (HUvEC line), and several other cell types. Furthermore, a critical aspect of cell adhesion through the adsorption of proteins on the surfaces is touched upon.

关键词： scaffolds electrospun nanofibers cellulose extracellular matrix cell culture

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design Principles of Diketopyrrolopyrrole-Thienopyrrolodione Acceptor1-Acceptor2 Copolymers

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ADvANCED FUNCTIONAL MATERIALS 2024年第32期34卷 2314696-2314696页

作者： Erhardt, Andreas Hungenberg, Julian Chantler, Paul Kuhn, Meike Huynh, Thanh Tung Hochgesang, Adrian Goel, Mahima Mueller, Christian J. Roychoudhury, Subhayan Thomsen, Lars Medhekar, Nikhil v. Herzig, Eva M. Prendergast, David Thelakkat, Mukundan McNeill, Christopher R. Univ Bayreuth Appl Funct Polymers Univ Str 30 D-95447 Bayreuth Germany Monash Univ Dept Mat Sci & Engn Wellington Rd Clayton Vic 3800 Australia Univ Bayreuth Dynam & Struct Format Herzig Grp Univ Str 30 D-95447 Bayreuth Germany Lawrence Berkeley Natl Lab Mol Foundry 1 Cyclotron Rd Berkeley CA 94720 USA Australian Synchrotron ANSTO Clayton Vic 3168 Australia Univ Bayreuth Bavarian Polymer Inst BPI Univ Str 30 D-95447 Bayreuth Germany

The design principles of acceptor(1)-acceptor(2) copolymers featuring alternating diketopyrrolopyrrole (DPP) and thienopyrrolodione (TPD) moieties are investigated. The investigated series of polymers is obtained by varying the aromatic linker between the two acceptor motifs between thiophene, thiazole, pyridine, and benzene. High electron affinities between 3.96 and 4.42 ev, facilitated by the synergy of the acceptor motifs are determined with optical gaps between 1.37 and 2.02 ev. Grazing incidence wide-angle X-ray scattering studies reveal a range of film morphologies after thermal annealing, including face-on, end-on and superstructure edge-on-like crystallites. Conversely, all materials form thin edge-on layers on the polymer-air interface, as demonstrated by multi-elemental near-edge X-ray absorption fine-structure spectroscopy. The benefit of the electron-deficient linkers thiazole and pyridine is evident: In organic field effect transistors, electron mobilities of up to 4.6 x 10(-2) cm(2) v-1 s(-1) are obtained with outstanding on/off current ratios of 5 x 10(5), facilitated by the absence of detectable hole transport in these materials. viability for all-polymer solar cells is assessed in active layer blends with the donor polymer PM6, yielding a maximum average power conversion efficiency of 4.8% and an open circuit voltage above 1 v.

关键词： acceptor(1)-acceptor(2) copolymers all-polymer solar cells microstructure OFET organic semiconductors

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