检索结果-内蒙古大学图书馆

Enhancing the thermal performance of different types of heat exchangers with fins: A comprehensive review

International Communications in Heat and Mass Transfer 2025年 166卷

作者： Farhan Lafta Rashid Zainab Abdul Karim Alkhekany Hayder J. Kurji Shabbir Ahmad Atef Chibani Mohamed Kezzar Karrar A. Hammoodi Saif Ali Kadhim Mohammed Amin Nassim Haddad Ephraim Bonah Agyekum Petroleum Engineering Department College of Engineering University of Kerbala Karbala 56001 Iraq College of Engineering University of Warith Al-Anbiyaa Karbala 56001 Iraq Mechanical Engineering Department College of Engineering University of Kerbala Karbala 56001 Iraq Graduate Program of Ocean Engineering School of Engineering Universidade Federal do Rio Grande Italia Avenue km 8 96201-900 Rio Grande Brazil Institute of Geophysics and Geomatics China University of Geosciences Wuhan 430074 China Research Center in Industrial Technologies CRTI P.O.Box 64 Cheraga 16014 Algiers Algeria Mechanical Engineering Department University of 20 Aout 1955 El Hadaiek Road B. O. 26 Skikda 21000 Algeria Materials and Energy Engineering Laboratory (LMGE) Technology Department Faculty of Technology 20 Aout 1955 University of Skikda PO Box 26 21000 Skikda Algeria Department College of Engineering University of Al Maarif Al Anbar 31001 Iraq College of Mechanical Engineering University of Technology-Iraq Baghdad Iraq LMSEA Mechanical Engineering Department National Polytechnic School of Constantine Constantine 25000 Algeria Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia Boris Yeltsin 19 Mira Street Ekaterinburg 620002 Russia Western Caspian University 31 Istiglaliyyat Street AZ1001 Baku Azerbaijan Istanbul Okan University Tuzla Campus Tuzla 34959 Istanbul Turkey Tashkent State University of Economics Islam Karimov Street 49 Tashkent City 100066 Uzbekistan

Heat exchangers are critical for thermal energy management efficiency in aerospace, automotive, food processing, and energy sector operations. This thorough study analyzes the thermal performance upgrades for different heat exchanger systems, particularly fins. Finned heat exchangers—including shell-and-tube, double-pipe, and compact types—enhance heat transfer through advanced geometries and manufacturing. Shell-and-tube heat exchangers (STHXs) perform well in cross-flow and phase-change but face maintenance and cost challenges. Double-pipe heat exchangers (DPHEs) improve performance but often have higher pressure drops and limited real-world testing. Compact heat exchangers (CHE) are space-efficient and benefit from additive manufacturing but face fabrication complexity and scalability issues and need further optimization and material innovation. The review analyzes new methods that optimize heat transfer performance using modern fin shapes, including rectangle-shaped fins, triangles, trapezoids, pin fins, and wavy fins. According to test results, these alternative fin designs lead to enhanced heat transfer rates and maintainable pressure drop levels. Scientific research has validated wavy fins as heat transfer performers because they enhance the Nusselt number to 28 % above circular tubes. Using ten longitudinal and wavy fins demonstrated maximum performance capabilities by reaching an overall response value of 1.33 in DPHEs. Future academic research moves toward designing compound heat exchangers from different materials while investigating novel performance-enhancing alternatives for thermal management systems in multiple applications. The review is a key reference to bridge gaps between heat exchanger design and optimization methods.

关键词： Compact Double-pipe Heat exchanger Review Shell-tube Thermal performance enhancement

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Disrupting cellular memory to overcome drug resistance

引用

Nature communications 2024年第1期15卷 4264页

作者： Guillaume Harmange Raúl A Reyes Hueros Dylan L Schaff Benjamin Emert Michael Saint-Antoine Laura C Kim Zijian Niu Shivani Nellore Mitchell E Fane Gretchen M Alicea Ashani T Weeraratna M Celeste Simon Abhyudai Singh Sydney M Shaffer Cellular and Molecular Biology Graduate Group Perelman School of Medicine University of Pennsylvania Philadelphia PA USA. Department of Biochemistry and Molecular Biophysics Perelman School of Medicine University of Pennsylvania Philadelphia PA USA. Department of Bioengineering School of Engineering and Applied Sciences University of Pennsylvania Philadelphia PA USA. Division of Biology and Biological Engineering California Institute of Technology Pasadena CA 91125 USA. Department of Electrical and Computer Engineering University of Delaware Newark DE 19716 USA. Abramson Family Cancer Research Institute Perelman School of Medicine University of Pennsylvania Philadelphia PA USA. Department of Chemistry College of the Arts and Sciences University of Pennsylvania Philadelphia PA USA. Department of Physics College of the Arts and Sciences University of Pennsylvania Philadelphia PA USA. Department of Biology College of the Arts and Sciences University of Pennsylvania Philadelphia PA USA. The Wharton School University of Pennsylvania Philadelphia PA USA. Cancer Signaling and Microenvironment Research Program Fox Chase Cancer Center Philadelphia PA USA. Department of Biochemistry and Molecular Biology Johns Hopkins School of Public Health Baltimore MD USA. Sidney Kimmel Cancer Center Johns Hopkins School of Medicine Baltimore MD USA. Department of Cell and Developmental Biology Perelman School of Medicine University of Pennsylvania Philadelphia PA USA. Department of Bioengineering School of Engineering and Applied Sciences University of Pennsylvania Philadelphia PA USA. sydshaffer@***. Department of Pathology Perelman School of Medicine University of Pennsylvania Philadelphia PA USA. sydshaffer@***.

来源：评论

学校读者我要写书评

暂无评论

A phase vocoder without requiring phase unwrapping

IEEJ Transactions on Electronics, Information and Systems

引用

IEEJ Transactions on Electronics, Information and Systems 2018年第4期138卷 352-359页

作者： Yoneguchi, Ryoichi Murakami, Takahiro Electrical Engineering Program Graduate School of Science and Technology Meiji University 1-1-1 Higashi-mita Tama-ku Kawasaki Kanagawa214-8571 Japan Department of Electronics and Bioinformatics School of Science and Technology Meiji University 1-1-1 Higashi-mita Tama-ku Kawasaki Kanagawa214-8571 Japan

In recent years, a number of algorithms for controlling parameters of an acoustic signal have been realized according as hardware technologies have been developed. A phase vocoder is one of the widely known methods for time scale modification (TSM) and pitch scale modification (PSM). The phase vocoder converts the length and the pitch of the acoustic signal by increasing or decreasing an instantaneous angular frequency. However, due to the phase unwrapping problem that occurs when the instantaneous angular frequency is estimated, the phase vocoder distorts the waveform of the modified signal. In order to alleviate this problem, we present a new algorithm for the phase vocoder. Our method does not encounter the phase unwrapping problem since we directly use the difference of phases between adjacent analysis frames to avoid estimating the instantaneous angular frequency. Moreover, our approach is effective even when the characteristics of the acoustic signal, e.g., a frequency and amplitude, change rapidly. © 2018 The Institute of electrical Engineers of Japan.

关键词： Acoustic waves

来源：评论

学校读者我要写书评

暂无评论

Phyllotaxis-inspired nanosieves with multiplexed orbital angular momentum

arXiv

引用

arXiv 2021年

作者： Jin, Zhongwei Janoschka, David Deng, Junhong Ge, Lin Dreher, Pascal Frank, Bettina Hu, Guangwei Ni, Jincheng Yang, Yuanjie Li, Jing Yu, Changyuan Lei, Dangyuan Li, Guixin Xiao, Shumin Mei, Shengtao Giessen, Harald zu Heringdorf, Frank Meyer Qiu, Cheng-Wei Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 Singapore117583 Singapore College of Optical and Electronic Technology China Jiliang University Hangzhou310018 China University of Duisburg–Essen Lotharstrasse 1-21 Duisburg47057 Germany Department of Materials Science and Engineering Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China Beijing Qianjunyide Technology Co. Ltd. Beijing100031 China University of Stuttgart StuttgartD-70569 Germany School of Physics University of Electronic Science and Technology of China Chengdu611731 China Key Laboratory of Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China Department of Electronic and Information Engineering Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong Hong Kong Department of Materials Science and Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong Hong Kong State Key Laboratory on Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Shenzhen Graduate School Harbin Institute of Technology Shenzhen518055 China

Nanophotonic platforms such as metasurfaces, achieving arbitrary phase profiles within ultrathin thickness, emerge as miniaturized, ultracompact and kaleidoscopic optical vortex generators. However, it is often required to segment or interleave independent sub-array metasurfaces to multiplex optical vortices in a single nano-device, which in turn affects the device’s compactness and channel capacity. Here, inspired by phyllotaxis patterns in pine cones and sunflowers, we theoretically prove and experimentally report that multiple optical vortices can be produced in a single compact phyllotaxis nanosieve, both in free space and on a chip, where one meta-atom may contribute to many vortices simultaneously. The time-resolved dynamics of on-chip interference wavefronts between multiple plasmonic vortices was revealed by ultrafast time-resolved photoemission electron microscopy. Our nature-inspired optical vortex generator would facilitate various vortex-related optical applications, including structured wavefront shaping, free-space and plasmonic vortices, and high-capacity information metaphotonics. Copyright © 2021, The Authors. All rights reserved.

关键词： Plasmonics

来源：评论

学校读者我要写书评

暂无评论

Reliable Wireless Connection for Factory through a Distributed Antenna System in 920MHz

Reliable Wireless Connection for Factory through a Distribut...

引用

Asia-Pacific Conference on Communications

作者： Ryo Iizuka Tetsushi Ikegami Electrical Engineering Program Graduate School of Science and Technology Meiji University 1-1-1 Higashimita Tama-ku Kawasaki Kanagawa Japan School of Science and Technology Meiji University 1-1-1 Higashimita Tama-ku Kawasaki Kanagawa Japan

ISBN: (数字)9781728136790

ISBN: (纸本)9781728136806

This paper discusses a reliable wireless connection for factory through a distributed antenna system in 920MHz. In this paper, a base station that combines multiple destination nodes installed in a factory and mobile nodes are assumed. In a proposed system, multiple TXs and RXs for a base station are assumed to be fed through a single fiber with Wavelength Division Multiplexing(WDM) or Time Division Multiplexing(TDM) technique with a concept of radio over fiber(RoF). Diversity combining technique are investigated for multiple antenna reception through measurement campaigns in a laboratory room that mimics a factory environment.

关键词： Diversity reception Wireless communication Production facilities Reliability Antennas Base stations Diversity methods

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Cortical astrocytes modulate dominance behavior in male mice by regulating synaptic excitatory and inhibitory balance

引用

Nature neuroscience 2023年第12期26卷 2250页

作者： Kyungchul Noh Woo-Hyun Cho Byung Hun Lee Dong Wook Kim Yoo Sung Kim Keebum Park Minkyu Hwang Ellane Barcelon Yoon Kyung Cho C Justin Lee Bo-Eun Yoon Se-Young Choi Hye Yoon Park Sang Beom Jun Sung Joong Lee Department of Physiology and Neuroscience Dental Research Institute Seoul National University School of Dentistry Seoul Republic of Korea. Department of Physics and Astronomy Seoul National University Seoul Republic of Korea. Department of Molecular Biology Dankook University Cheonan Republic of Korea. Department of Electronic and Electrical Engineering Ewha Womans University Seoul Republic of Korea. Center for Cognition and Sociality Institute for Basic Science (IBS) Daejeon Republic of Korea. Department of Electrical and Computer Engineering University of Minnesota Minneapolis MN USA. Graduate Program in Smart Factory Ewha Womans University Seoul Republic of Korea. Department of Brain & Cognitive Sciences Ewha Womans University Seoul Republic of Korea. Department of Physiology and Neuroscience Dental Research Institute Seoul National University School of Dentistry Seoul Republic of Korea. sjlee87@snu.ac.kr.

来源：评论

学校读者我要写书评

暂无评论

Band-gap engineering, magnetic behavior and Dirac-semimetal character in the MoSi2N4 nanoribbon with armchair and zigzag edges

arXiv

引用

arXiv 2021年

作者： Bafekry, A. Faraji, M. Stampfl, C. Sarsari, I. Abdolhosseini Ziabari, A. Abdollahzadeh Hieu, N.N. Karbasizadeh, S. Ghergherehchi, M. Department of Physics University of Antwerp Groenenborgerlaan 171 AntwerpB-2020 Belgium Micro and Nanotechnology Graduate Program TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu Ankara06560 Turkey School of Physics University of Sydney NSW2006 Australia Department of Physics Isfahan University of Technology Isfahan84156-83111 Iran Nano Research Lab Lahijan Branch Islamic Azad University Lahijan Iran Institute of Research and Development Duy Tan University Da Nang550000 Viet Nam Faculty of Natural Sciences Duy Tan University Da Nang550000 Viet Nam College of Electronic and Electrical Engineering Sungkyunkwan University Suwon Korea Republic of

Motivated by the recent successful formation of the MoSi2N4 monolayer [Hong et al., Sci. 369, 670 (2020)], the structural, electronic and magnetic properties of MoSi2N4 nanoribbons (NRs) is investigated for the first time . The band structure calculations showed spin-polarization in zigzag edges and a non-magnetic semiconducting character in armchair edges. For armchair-edges, we identify an indirect to direct band gap shift compared to the MoSi2N4 monolayer, and its energy gap increases with increasing NR width. Anisotropic electrical and magnetic behavior is observed via band structure calculations in the zigzag and armchair edges, where, surprisingly, for the one type of zigzag-edges configuration, we identify a Dirac-semimetal character. The appearance of magnetism and Dirac-semimetal in MoSi2N4 ribbon can give rise to novel physical properties, which could be useful in applications for next-generation electronic devices. © 2021, CC BY.

关键词： Nanoribbons

来源：评论

学校读者我要写书评

暂无评论

Short-Term Effects of a Therapeutic Diet on Biochemical Parameters in Hemodialysis Patients: A Randomized Crossover Trial

引用

Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation 2023年第6期33卷 731-739页

作者： Wan-Chuan Tsai Shih-Ping Hsu Yen-Ling Chiu Hon-Yen Wu Chia-Chin Luan Ju-Yeh Yang Mei-Fen Pai Cheng-Jui Lin Wan-Yu Lin Wen-Huei Sun Yu-Sen Peng Division of Nephrology Department of Internal Medicine Far Eastern Memorial Hospital New Taipei City Taiwan Center for General Education Lee-Ming Institute of Technology New Taipei City Taiwan. School of Life Science National Taiwan Normal University Taipei City Taiwan. Graduate Program in Biomedical Informatics Yuan Ze University Taoyuan City Taiwan. Institute of Epidemiology and Preventive Medicine College of Public Health National Taiwan University Taipei City Taiwan Faculty of Medicine School of Medicine National Yang-Ming University Taipei City Taiwan. Dietary Department Far Eastern Memorial Hospital New Taipei City Taiwan. Division of Nephrology Department of Internal Medicine Far Eastern Memorial Hospital New Taipei City Taiwan. Division of Nephrology Department of Internal Medicine Mackay Memorial Hospital Taipei City Taiwan Department of Medicine Mackay Medical College Taipei City Taiwan Mackay Junior College of Medicine Nursing and Management Taipei City Taiwan. Institute of Epidemiology and Preventive Medicine College of Public Health National Taiwan University Taipei City Taiwan. Dietary Department Far Eastern Memorial Hospital New Taipei City Taiwan. Electronic address: 830636231@mail.femh.org.tw. Department of Applied Cosmetology Lee-Ming Institute of Technology New Taipei City Taiwan Department of Electrical Engineering Yuan Ze University Taoyuan City Taiwan. Electronic address: taan70@***.

OBJECTIVE:Although unhealthy diets exacerbate nutritional and metabolic derangements in patients with end-stage kidney disease (ESKD), how therapeutic diets that possess a variety of different dietary strategies acutely modify diverse biochemical parameters related to cardiovascular disease remains underexplored. METHODS:Thirty-three adults with end-stage kidney disease undergoing thrice-weekly hemodialysis participated in a randomized crossover trial comparing a therapeutic diet with their usual diets for 7 days, separated by a 4-week washout period. The therapeutic diet was characterized by adequate calorie and protein amounts, natural food ingredients with a low phosphorus-to-protein ratio, higher portions of plant-based food, and high fiber content. The primary outcome measure was the mean difference in the change-from-baseline intact fibroblast growth factor 23 (FGF23) level between the 2 diets. The other outcomes of interest included changes in mineral parameters, uremic toxins, and high-sensitivity C-reactive protein (hs-CRP) levels. RESULTS:Compared with the usual diet, the therapeutic diet lowered intact FGF23 levels (P = .001), decreased serum phosphate levels (P < .001), reduced intact parathyroid hormone (PTH) levels (P = .003), lowered C-terminal FGF23 levels (P = .03), increased serum calcium levels (P = .01), and tended to lower total indoxyl sulfate levels (P = .07) but had no significant effect on hs-CRP levels. Among these changes, reduction in serum phosphate level achieved in 2 days, modifications of intact PTH and calcium levels in 5 days, and reductions in intact and C-terminal FGF23 levels in 7 days of therapeutic diet intervention. CONCLUSION:Within the 1-week intervention period, the dialysis-specific therapeutic diet rapidly reversed mineral abnormalities and tended to decrease total indoxyl sulfate levels in patients undergoing hemodialysis but had no effect on inflammation. Future studies to assess the long-term effects of such therapeuti

关键词： FGF23 dialysis inflammation therapeutic diet uremic toxin

来源：评论

学校读者我要写书评

暂无评论

Self-packaged stretchable printed circuits with ligand-bound liquid metal particles in elastomer

引用

Nature communications 2025年第1期16卷 4944页

作者： Hyeonyeob Seo Gun-Hee Lee Jiwoo Park Dong-Yeong Kim Yeonzu Son Semin Kim Kum Seok Nam Congqi Yang Joonhee Won Jae-Young Bae Hyunjun Kim Seung-Kyun Kang Steve Park Jiheong Kang Seongjun Park Department of Bio and Brain Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Departments of Cogno-Mechatronics Engineering Pusan National University Busan Republic of Korea. Departments of Optics and Mechatronics Engineering Pusan National University Busan Republic of Korea. School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Program of Brain and Cognitive Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea. Graduate School of Semiconductor Technology Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Medical Research Center Seoul National University Seoul Republic of Korea. Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Department of Materials Science and Engineering Seoul National University Seoul Republic of Korea. KAIST Institute for NanoCentury Daejeon Republic of Korea. Department of Chemistry Seoul National University Seoul Republic of Korea. jiheongkang@snu.ac.kr. Medical Research Center Seoul National University Seoul Republic of Korea. seongjunpark@snu.ac.kr. Department of Biomedical Sciences College of Medicine Seoul National University Seoul Republic of Korea. seongjunpark@snu.ac.kr. School of Transdisciplinary Innovations Seoul National University Seoul Republic of Korea. seongjunpark@snu.ac.kr. Interdisciplinary Program in Bioengineering College of Engineering Seoul National University Seoul Republic of Korea. seongjunpark@snu.ac.kr. Department of Transdisciplinary Medicine Seoul National University Hospital Seoul South Korea. seongjunpark@snu.ac.kr.

Packaging in stretchable electronics is crucial to protect components from environmental damage while preserving mechanical flexibility and providing electrical insulation. The conventional packaging process involves multiple steps that increase in complexity as the number of circuit layers multiply. In this study, we introduce a self-packaged stretchable printed circuit board enabled by the in situ phase separation of liquid metal particles (LMPs) within various polymer matrices during solution-based printing processes. The ligand-bound LMPs (LB-LMPs), engineered to inhibit oxide growth, undergo in situ sintering, prompting vertical phase separation. This synthesis strategy not only achieves high initial conductivity of the LMPs but also encapsulates them within the polymer matrix, preventing leakage and providing electrical insulation. Our method enables multi-layer circuit printing, eliminating the need for additional activation and packaging processes. Furthermore, by integrating conductive materials into packaging layers for selective electrical conductivity, vertical interconnect accesses and conductive pads can be formed, enabling large-scale, stretchable, and leakage-free multi-layer electrical circuits and bio-interfaces.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Toward Quantification and Visualization of Active Stress Waves for Myocardial Biomechanical Function Assessment

Toward Quantification and Visualization of Active Stress Wav...

引用

2019 Computing in Cardiology, CinC 2019

作者： Otani, Niels F. Linte, Cristian A. Dang, Dylan Beam, Christopher Mohammadi, Fariba Wentz, Brian Kamrul Hasan, S.M. Shontz, Suzanne M. Schwarz, Karl Q. Thomas, Sabu Rochester Institute of Technology School of Mathematical Sciences RochesterNY United States Mechanical Engineering University of Kansas LawrenceKS United States Bioengineering Graduate Program University of Kansas LawrenceKS United States Center for Imaging Science Rochester Institute of Technology RochesterNY United States Electrical Engineering and Computer Science University of Kansas LawrenceKS United States Division of Cardiology University of Rochester Medical Center RochesterNY United States RochesterNY14467 United States

ISBN: (纸本)9781728169361

Estimating and visualizing myocardial active stress wave patterns is crucial to understanding the mechanical activity of the heart and provides a potential non-invasive method to assess myocardial function. These patterns can be reconstructed by analyzing 2D and/or 3D tissue displacement data acquired using medical imaging. Here we describe an application that utilizes a 3D finite element formulation to reconstruct active stress from displacement data. As a proof of concept, a simple cubic mesh was used to represent a myocardial tissue "sample" consisting of a 10 x 10 x 10 lattice of nodes featuring different fiber directions that rotate with depth, mimicking cardiac transverse isotropy. In the forward model, tissue deformation was generated using a test wave with active stresses that mimic the myocardial contractile forces. The generated deformation field was used as input to an inverse model designed to reconstruct the original active stress distribution. We numerically simulated malfunctioning tissue regions (experiencing limited contractility and hence active stress) within the healthy tissue. We also assessed model sensitivity by adding noise to the deformation field generated using the forward model. The difference image between the original and reconstructed active stress distribution suggests that the model accurately estimates active stress from tissue deformation data with a high signal-to-noise ratio. © 2019 Creative Commons.

关键词： Medical imaging

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：