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IEEE Forum on Integrated and Sustainable Transportation System (FISTS)

作者： Chuheng Wei Ziye Qin Guoyuan Wu Matthew J. Barth Amr Abdelraouf rohit Gupta Kyungtae Han Center for Environmental Research and Technology College of Engineering University of California at Riverside Riverside CA School of Transportation and Logistics Southwest Jiaotong University Chengdu China InfoTech Labs Toyota Motor North America R&D Mountain View CA

In this paper, we examine the problem of the dilemma Zone (dZ) in depth, weaving together the various influences that span the environment, the ego-vehicle, and ultimately the characteristics of the driver. driver behavior in dilemma zone situations is crucial, and more research is urgently needed in this area. The journey through various modeling approaches and data acquisition techniques sheds new light on driver behavior within the dilemma zone context. Our thorough examination of the current research landscape has revealed that several significant areas remain overlooked. As well as the dynamic impact of vehicles, vehicle interactions, and a strong tendency to over-rely on infrastructure information, there are also concerns about the lack of comprehensive evaluation tools. However, we do not see these gaps as stumbling blocks, but rather as steppingstones for future research opportunities. A more focused study of cooperative solutions is required considering the potential of personalized modeling, the untapped power of machine learning techniques, and the importance of personalized modeling. It is our hope that by embracing innovative approaches that can capture and simulate personalized behavioral data using “everything-in-the-loop” simulations, future research endeavors will be guided. To effectively mitigate the dZ problem, we also point out the research gaps and opportunities for further research in the dZ.

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Sulfonated Graphene Oxide Linked with Alkali Metal Ions Membranes for Proton Conductivity in Hydrogen Production from Water Electrolysis

SSRN

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SSrN 2024年

作者： Wei-Song, Hung Subrahmanya, T.M. Chi, Yang Jo Nayak, Smrutiranjan Abebe, Shalligito Habetamu Kadja, Grandprix T.M. Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced Membrane Materials Research Center Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Bandung Institute of Technology Indonesia R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

Amid technological advances, rising energy demand, and environmental concerns, countries endorse green energy solutions. Prominent among them is hydrogen production via clean water electrolysis, a key strategy for sustainable development. Herein, to address the limitations of expensive and potentially harmful Nafion membranes, we have developed a new graphene oxide (GO) series membranes (hydrophilic sulfonated GO (GO-SO3H) linked with monovalent alkali metal ions were synthesized to fabricate the membranes) to be used in water electrolysis for hydrogen production by introducing the iodide oxidation reaction (IOr) as an alternative to the traditional oxygen evolution reaction (OEr). Various modifications by sulfuric acid, methanol, and different alkali metal hydroxides (LiOH, NaOH, KOH) result in membranes with distinct properties. Characterization techniques, including ATr-FTIr, SEM, AFM, Xrd, water contact angle (WCA), and electrochemical impedance spectroscopy (EIS), validated the modifications, assessed membrane morphology, interlayer spacing, hydrophilicity, and electrical properties. Among the membranes, GO-SO3K stood out, exhibiting the highest proton conductivity (119.16 mS) and superior potassium ion permeability (20.382 cm/s). Importantly, all GO series membranes demonstrate excellent stability in the electrochemical system. The findings suggested that GO-SO3K holds promise as a potassium ion-conductive membrane for efficient and sustainable hydrogen production, offering a viable alternative to conventional Nafion membranes in water electrolysis applications. © 2024, The Authors. All rights reserved.

关键词： Hydrogen production

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design and Evaluation of an AUV with dual Acoustic Communication Modems

Design and Evaluation of an AUV with Dual Acoustic Communica...

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OCEANS

作者： Moon Hwan Kim Taesuk Yoo Yoonho Jeon Hyungi Jung Dept. E.E Engineering Yonsei University Seoul South Korea LIG Nexl Maritime R&D Center Seongnam South Korea Maritime Technology Research Institute Agency for Defense Development Jinhae South Korea

ISBN: (数字)9798350362077

ISBN: (纸本)9798350362084

In this paper, a method for designing and fabricating an autonomous underwater vehicle (AUV) with a dual Acoustic Communication Modem is presented. The aim is to ensure reli-able communication in challenging underwater environments. To achieve this, the AUV incorporates two underwater communication modems that use the FKS-FH and PSK-OFdM methods. The proposed AUV also includes a combined inertial measurement unit (IMU) and doppler velocity log (dVL) navigation system, as well as a non-linear controller. These features enable stable navigation and the collection of topographical information from the seabed. real-world sea trials were conducted to validate the AUV's performance in terms of precise control, stability, underwater communication, and navigation. The success rate and maximum communication distance of the underwater communication system were calculated. Furthermore, real-field tests were carried out to confirm the system's reliable underwater commu-nication and navigation capabilities. The successful integration of advanced navigation systems and underwater communication technologies into the AUV demonstrates its potential for complex marine tasks and operations.

关键词： Underwater communication Sea surface Measurement units Navigation Acoustic communication (telecommunication) Inertial navigation Modems

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defective Covalent Organic Frameworks Interlayer Modified Polyamide Nanofiltration Membrane for Selective Ion Sieving

SSRN

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SSrN 2024年

作者： Fang, Yin-Xin Xu, Zhen-Liang Xu, Sun-Jie State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology Shanghai200237 China School of Materials Science and Engineering East China University of Science and Technology Shanghai200237 China Shanghai Electronic Chemicals Innovation Institute East China University of Science and Technology Shanghai200237 China

Generally, thin-film composite (TFC) membrane prepared via piperazine (PIP) and trimesoyl chloride (TMC) has a good rejection of Na2SO4, but the rejection of MgCl2 was not satisfactory. Herein, a defective covalent organic frameworks (COFs) interlayer is fabricated via interfacial polymerization (IP) method by changing the catalyst concentration. The effect of the COFs layer is modifying the pore size of polyamide (PA) layer to improve the rejection of divalent cation. The results shows that the pore size of PA layer decreases and the surface morphology of the membrane transfers from nodule to hybrid morphologies of "ridge-and-valley’’ and nodule, indicating that the residual unreacted amine groups on the COFs interlayer have successfully reacted with the acyl chloride groups. Meanwhile, the optimal PIP/COF-A/PES membrane has high rejections of divalent ions (Na2SO4 of 98.3%, MgCl2 of 94.3%), and the membrane shows an excellent mono/divalent ions separation performance. Therefore, this work raises a novel method to prepare NF membrane by modifying the PA layer for the enhancement of divalent cation rejection. © 2024, The Authors. All rights reserved.

关键词： Nanofiltration

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Investigating the impact of metal ion variations in terephthalate metal–organic frameworks on the organic solvent nanofiltration performance of mixed matrix membranes

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Journal of Membrane Science 2024年 700卷

作者： Ajebe, Eyasu Gebrie Hu, Chien Chieh Lugito, Graecia Hu, Chun-Po Hung, Wei-Song Lee, Kueir-rarn Lai, Juin-Yih Graduate Institute of Applied Science and Technology Advanced Membrane Materials Research Center National Taiwan University of Science and Technology Taipei Taiwan Chemical Engineering Study Program Faculty of Industrial Technology Institut Teknologi Bandung West Java Indonesia Nanyang Technological University 1 Cleantech Loop Singapore R&D Center for Membrane Technology Chung Yuan University Chungli Taoyuan Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chungli Taoyuan Taiwan

Nano-fillers integrated into mixed matrix membranes (MMMs) present promising alternatives for organic solvent nanofiltration (OSN). In this work, our objective is to enhance OSN performance by incorporating terephthalate metal-organic frameworks (M-BdC, where M = Zr or Cu) into a P84 matrix to fabricate M-BdC/P84 composite MMMs. This work focuses on the influence of metal cluster variation on particle size, pore size distribution, and specific surface area of M-BdC, while systematically investigating the impact of M-BdC addition on OSN performance and underlying separation mechanisms. The synthesized membranes underwent comprehensive characterization using SEM, Xrd, ATr-FTIr, contact angle, zeta potential, and thermogravimetric analysis. Significantly, all MMMs exhibited superior permeance and methyl blue (MB) rejection compared to P84 membranes. This enhancement is attributed to the improved interfacial contact between M-BdC and P84, as well as their effective dispersion within the membrane matrix. Interestingly, comparative analysis between Cu-BdC/P84 and Zr-BdC/P84 MMMs revealed the latter's superior permeance, attributed to its larger pore size and surface area. The resulting MMMs demonstrated outstanding MB rejection (>96.7%) with ethanol permeance of 21.5 and 19.0 LMH/Bar for Zr-BdC/P84 and Cu-BdC/P84 MMMs, respectively. Furthermore, the stable performance of M-BdC-based MMMs during prolonged MB/ethanol operation underscores their potential significance in the field of OSN, providing valuable insights for future membrane design and application. © 2024 Elsevier B.V.

关键词： Organometallics

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development and Sea Trail of the Floating Kuroshio Turbine

Development and Sea Trail of the Floating Kuroshio Turbine

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International Symposium on Underwater technology

作者： Ling-Ji Mu Sheng-Wei Huang Tien-En Hou Edward Chen Yu-Ting Hung Forng-Chen Chiu Jenhwa Guo Department of Engineering Science and Ocean Engineering National Taiwan University Taipei Taiwan Ship and Ocean Technology Research Center National Taiwan University Taipei Taiwan Department of Engineering Science and Ocean Engineering Ship and Ocean Industries R&D Center (SOIC) National Taiwan University Taipei Taiwan

Kuroshio is considered a clean, reliable, and endless energy source; the potential energy reserves on the eastern coast of Taiwan are estimated to be at least 4 GW. If the kinetic energy of Kuroshio can be effectively used to generate electricity, it will become an essential and sustainable energy source for Taiwan. This paper presents a 20 kW Floating Kuroshio Turbine (FKT) for capturing ocean current power and transferring it into electricity. The FKT is mainly composed of a hydrofoil floating body, a buoyancy control system (BCS), two vertical supports, a crossbeam, and two 10 kW power generators. In 2020, the first 1/5 scaled 10 kW model with a single rotor was constructed, and the 20 kW model equipped with two rotors, integrated with a BCS, was then established in 2021. The experimental towing test of both 10 kW and 20 kW models was carried out in open water. Continuing with the same system configuration, the first mooring experimental test for the 20 kW model has conducted on the near shore of Liuqiu Island in October 2022. In this paper, the design and main components of the 20 kW FKT are first addressed. Then the test methods of the towing experiments for the BCS and the mooring test for power production are described. It includes the result of the nacelle pressure test, the BCS test, and the power production test. The 20 kW FKT can operate stably in water, and both the BCS and turbines' performance were verified.

关键词： Shafts renewable energy sources Systems operation rotors Sea measurements Buoyancy Seals

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A Memory Access Number Constraint Based String Prediction Technique for High Throughput Scc Implemented in Avs3

SSRN

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SSrN 2024年

作者： Zhao, Liping Yan, Zuge Hu, Keli Feng, Sheng Wang, Jiangda Cao, Xueyan Lin, Tao Department of Computer Science and Engineering Shaoxing University China College of Electronics and Information Engineering Tongji University China Information Technology R&D Innovation Center Peking University China Institute of Artificial Intelligence Shaoxing University China Cancer Center Department of Gastroenterology Zhejiang Provincial People’s Hospital China

We are the first to propose a technique called Memory Access Number Constraint-based String Prediction (MANC-SP) to achieve high throughput in SCC. First, a novel MANC-SP framework is proposed, a well-designed memory access number constraint rule is established based on statistical data, and a constrained rdO-based string-searching method is presented. Compared to the existing state-of-the-art SP, experimental results have demonstrated that MANC-SP can improve the throughput from 2 to 2.67 PPMA, achieving a throughput improvement of 33.33% while maintaining a negligible impact on coding efficiency and complexity. © 2024, The Authors. All rights reserved.

关键词： Forecasting

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realization of sub-4 μm Laser Microvia on ABF 18

Realization of sub-4 μm Laser Microvia on ABF

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18th International Microsystems, Packaging, Assembly and Circuits technology Conference, IMPACT 2023

作者： Otsu, Toshio Tani, Shuntaro Nakazato, Tomoharu Tamaru, Hiroharu Sakaue, Kazuyuki Okada, George Nakamura, Naoyuki Nishimae, Junichi Miyamoto, ryo Kobayashi, Yohei The University of Tokyo The Institute for Solid State Physics Chiba Kashiwa277-8581 Japan Research Institute for Photon Science and Laser Technology Bunkyo Tokyo113-0033 Japan University of Tokyo Graduate School of Science Bunkyo Tokyo113-0033 Japan University of Tokyo Graduate School of Engineering Bunkyo Tokyo113-8656 Japan Specteronix Co. Osaka Suita564-0062 Japan Advanced Technology R&d Center Mitsubishi Electric Co. Hyogo Amagasaki661-8661 Japan Ajinomoto Fine-Techno Co. Inc. R&d 3G Suzuki-cho Kawasaki-shi Kanagawa Kawasaki210-0801 Japan

ISBN: (纸本)9798350384123

In recent years, high-density I/O has been implemented in IC packages. As a result, the density of wiring and drilling on build-up boards has significantly increased. A major bottleneck in achieving even higher density pattern on build-up boards is micro-vias formation. Thus, further miniaturization of microvias is one of the most important issues in packaging. We are developing a deep ultraviolet (dUV) laser processing machine that delivers intense laser pulses with a wavelength more than 30 times shorter than that of the CO2 lasers currently used for microvias processing. In this article, we demonstrate the drilling of sub-4 μm microvias on the Ajinomoto Build-up Film® (ABF) using direct dUV-laser processing. The sub 4-μm holes allow for a hole density that is twice as high as that of the 6-μm holes we reported previously. © 2023 IEEE.

关键词： Infill drilling

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The impact of the heat leakage through air gap on thermoelectric generator applied in engine waste heat recovery

Green Energy and Resources

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Green Energy and resources 2024年第3期2卷

作者： Zhang, Ning Wang, Jiawei Li, Yuhuai Lan, Jianglin Lan, Song Powertrain Technology R&D Center Guangzhou Automobile Group Research and Development Center 510000 China School of Automotive and Transportation Engineering Hefei University of Technology 230009 China James Watt School of Engineering University of Glasgow Glasgow G12 8QQ United Kingdom

Efforts to enhance the performance of thermoelectric generators (TEGs) in engine waste heat recovery have primarily focused on directly increasing energy conversion efficiency. Heat leakage can occur in many parts of a TEG. It is needed to develop a model to help researchers study this phenomenon and propose measures to reduce heat leakage. To address this gap, this study establishes and validates a computational fluid dynamic (CFd) and finite element (FE) coupled model based on a TEG prototype and its engine test bench. Unlike other models, this approach captures the intricate dynamics of heat propagation from the TEG via air gaps, encompassing conduction, convection, and radiation. Comprehensive analysis reveals that heat leakage accounts for approximately 11% of TEG power output loss. Ignoring the impact of heat leakage can lead to an overestimation of TEG power output. Key areas of heat leakage are identified, and numerical factors influencing this phenomenon are explored. Vertical TEG placement and optimal spacing between thermoelectric modules emerge as effective strategies for mitigating the impact of heat leakage on power output. Leveraging these insights, strategic thermoelectric module placement, vertical TEG orientation, and the application of thermal insulation materials to the heat exchanger are proposed as measures to enhance TEG power output by approximately 5%. The experimental and numerical results underscore the feasibility of optimizing TEGs from the perspective of heat leakage, a crucial aspect previously overlooked. These findings provide valuable insights for future TEG optimization endeavors, highlighting the importance of addressing heat leakage to maximize TEG performance. © 2024 The Authors

关键词： Engine waste heat recovery Heat leakage Optimization Thermoelectric generator

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Ultrasensitive and high-speed AlGaN/AlN solarblind ultraviolet photodetector:a full-channelself-depleted phototransistor by a virtual photogate

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Photonics research 2022年第9期10卷 2229-2238页

作者： JIABING LU ZESHENG LV XINJIA QIU SHIQUAN LAI HAO JIANG School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006 China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 51006 China Guangdong Engineering Technology R&D Center of Compound Semiconductors and Devices Sun Yat-sen UniversityGuangzhou 510006China

High sensitivity,high solar rejection ratio,and fast response are essential characteristics for most practical applications of solar-blind ultraviolet(UV)*** features,however,usually require a complex device structure,complicated process,and high operating ***,a simply structured n-Al Ga N/Al N phototransistor with a self-depleted full channel is *** self-depletion of the highly conductive n-Al Ga N channel is achieved by exploiting the strong polarization-induced electric field therein to act as a virtual *** resulting two-terminal detectors with interdigital Ohmic electrodes exhibit an ultrahigh gain of 1.3×10^(5),an ultrafast response speed with rise/decay times of 537.5 ps/3.1μs,and an ultrahigh Johnson and shot noise(flicker noise)limited specific detectivity of 1.5×10^(18)(4.7×10^(16))Jones at 20-V ***,a very low dark current of the order of~p A and a photo-to-dark current ratio of above 10^(8)are obtained,due to the complete depletion of the n-Al_(0.5)Ga_(0.5)N channel layer and the high optical *** proposed planar phototransistor combines fabrication simplicity and performance advantages,and thus is promising in a variety of UV detection applications.

关键词： transistor channel polarization

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