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IEEE Symposium on Wireless technology and Applications (ISWTA)

作者： Surajo Muhammad Osama Abuajwa Sufian Mitani Jun Jiat Tiang Research & Innovation Development Division Telekom Research & Development (TM R&D) TM Innovation Centre Cyberjaya Malaysia Futurist Unit Telekom Research & Development (TM R&D) TM Innovation Centre Cyberjaya Malaysia Faculty of Engineering Centre For Wireless Technology Multimedia University Cyberjaya Malaysia

ISBN: (数字)9798350351354

ISBN: (纸本)9798350351361

This paper presents a compact and efficient rectifier capable of harvesting GSM/900 radio frequency (rF) signals. The design uses an impedance-matching network (IMN) block with a series of short radial and curve stubs and an inductor. The rectifier is designed on rT/duroid substrate and has a total size of $22.10\ \text{mm}\times 8.30\ \text{mm}$ , using a single series diode configuration. The proposed design achieves a maximum power conversion efficiency (PCE) of 83.50% at 1 dBm input power. It can also detect and convert low rF input power below −40 dBm into a usable output dC source, making it suitable for low-powered wireless communication systems. Overall, this compact rectifier is a promising solution for harvesting ambient rF energy and can be used for long transmission with minimal path loss.

关键词： radio frequency Wireless communication Shunts (electrical) rF signals rectifiers Size measurement Propagation losses

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Intelligent Prediction and Key Factor Analysis to Lost Circulation from drilling data based on Machine Learning

Intelligent Prediction and Key Factor Analysis to Lost Circu...

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2022 International Conference on Computer Graphics, Artificial Intelligence, and data Processing, ICCAId 2022

作者： Wen, Guangyao Chen, Huailong Zhou, Tuo Gao, Chengwu Baletabieke, Bahedaer Zhou, Haiqiu Wang, Shan CNPC Amu Darya River Gas Exploration & Development Company Beijing102299 China CNPC Engineering Technology R&D Company Limited Beijing102206 China Beijing Chen Yu Jin Yuan Science and Technology Company Limited Beijing100010 China

ISBN: (纸本)9781510663350

Lost circulation during drilling wells is very detrimental since it greatly increases the non-productive time and operational cost, also seriously lead to wellbore instability, pipe sticking, blow out, etc... However, in the process of drilling wells, geological characteristics and operational drilling parameters all may have impacts to the lost circulation. This makes the establishment of the relations between the lost circulation and drilling factors very challenging. In this paper, we tested five different kernel function (linear, quadratic, cubic, medium Gaussian and fine Gaussian) derived support vector regression (SVr) models and four-layer artificial neural network (ANN). By combining their accuracy and time efficiency, the ANN is regarded as the optimal predictor of lost circulation. By training ANN using different combination of drilling features, we concluded that depth, torque, hanging weight, displacement, entrance density and export density are the key factors to accurate predict the lost circulation. The corresponding trained ANN network can achieve 99.2% accuracy and evaluate whether a drilling feature vector corresponds to lost circulation or not in milliseconds. © 2023 SPIE.

关键词： Multilayer neural networks

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Enhanced convolutional neural network methodology for solid waste classification utilizing data augmentation techniques

Waste Management Bulletin

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Waste Management Bulletin 2024年第4期2卷 184-193页

作者： Hogan Itam, daniel Chimeme Martin, Ekwueme Taiwo Horsfall, Ibiba Department of Civil and Environmental Engineering Faculty of Engineering & Technology University of Calabar Cross Rivers State Nigeria Department of Agricultural and Bioresources Engineering Michael Okpara University of Agriculture Abia State Umudike Nigeria Department of Research and Development (R&D) Eco-Thrivetide Consulting Ltd Rivers State Port Harcourt Nigeria

The increasing volume of solid waste generated globally necessitates efficient classification systems to enhance recycling and waste management processes. Convolutional Neural Networks (CNNs) have emerged as a powerful tool for image classification tasks, including solid waste identification. However, difficult external variables including changes in illumination, occlusion, and background clutter can have a big impact on CNN performance. Furthermore, pooling procedures frequently cause classic CNNs to lose spatial information, which might impair performance on tasks requiring extremely fine sense of place. This paper presents a comprehensive study on the application of an improved CNN-based models for solid waste classification. In the present study we explored image data resizing, augmentation technique and hyperparameter tuning to improve the performance of the proposed model. The results demonstrate that the improved-CNN model achieved high accuracy of 94.40 % compared to the conventional CNN and other deep learning model such as resNet-50, Inception-V3 and VGG-19 (81.83, 66.67, 52.83 and 56.00 %). © 2024 The Authors

关键词： data augmentation techniques Enhanced convolutional neural network (ECNN) Machine learning in waste management Solid waste classification

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Various dicing Methods for Silicon Carbide Wafers

Various Dicing Methods for Silicon Carbide Wafers

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Electronics Packaging technology Conference (EPTC)

作者： YuJin Jeon SeokHo Na MinSoo Gim JoHyun Bae dongSu ryu dongJoo Park Kyungrok Park Advanced Process & Material Project Global R&D Center Amkor Technology Korea Inc Incheon Republic of Korea

Compared to silicon (Si), silicon carbide (SiC) is a promising and more suitable material for higher power semiconductors. Since SiC has a wider bandgap than silicon, it can achieve stable high temperature operation, high thermal conductivity, and high switching speeds. despite its superior technical properties, in a wafer dicing process such as a conventional blade dicing method for Si, SiC is hard and brittle so it cracking can easily occur and propagate. The goal of this study is to find a stable dicing method for SiC wafers. Various existing dicing methods as well as a new technology dicing method, stealth & break, were evaluated and compared in terms of quality and productivity. The results show that a stealth & break process is preferred when requiring high chip-out quality and productivity. Also, scribe & break is suitable for devices where peeling and burr criteria are required. An existing dicing method, such as blade dicing, is not better than others in terms of quality and productivity. However, since blade dicing and laser grooving can be used for both Si and SiC, these methods need to be considered for cost and manufacturing *** study provides pros and cons of each process as well as guidelines on which dicing process is more suitable depending on the manufacturing facility and quality requirements.

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Negative data in data Sets for Machine Learning Training

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OrGANIC LETTErS 2023年第17期25卷 2945-2947页

作者： Maloney, Michael P. Coley, Connor W. Genheden, Samuel Carson, Nessa Helquist, Paul Norrby, Per-Ola Wiest, Olaf Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana 46556 United States Department of Chemical Engineering and Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139 United States Molecular AI Discovery Sciences R&D AstraZeneca Gothenburg Pepparedsleden 1 SE-431 83 Mölndal Sweden Early Chemical Development Pharmaceutical Sciences R&D AstraZeneca Macclesfield SK10 2NA U.K. Data Science and Modelling Pharmaceutical Sciences R&D AstraZeneca Gothenburg Pepparedsleden 1 SE-431 83 Mölndal Sweden

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Oncology research 2024年第2期32卷 421-432页

作者： SEUNG-HEE GWAK JUHYUN LEE EUNJI OH dOHYUN LEE WONSHIK HAN JONGMIN KIM KYONG-TAI KIM Department of Life Sciences Pohang University of Science and TechnologyPohang37673Korea R&D Center NovMetaPharma Co.Ltd.Pohang37668Korea Department of Surgery and Cancer Research Institute Seoul National University College of MedicineSeoul03080Korea Generative Genomics Research Center Global Green Research&Development CenterHandong Global UniversityPohang37554Korea

Genetic information is transcribed from genomic dNA to mrNA,which is then translated into threedimensional *** can undergo various post-transcriptional modifications,including rNA editing that alters mrNA sequences,ultimately affecting protein *** this study,rNA editing was identified at the 499th base(c.499)of human vaccinia-related kinase 2(VrK2).This rNA editing changes the amino acid in the catalytic domain of VrK2 from isoleucine(with adenine base)to valine(with guanine base).Isoleucine-containing VrK2 has higher kinase activity than the valine-containing VrK2,which leads to an increase in tumor cell *** we reported that VrK2 directly interacts with dystrobrevin-binding protein(dysbindin)and results in reducing its ***,we demonstrate that isoleucine-containing VrK2 decreases the level of dysbindin than valinecontaining *** interacts with cyclin d and thereby regulates its expression and *** reduction in the level of dysbindin by isoleucine-containing VrK2 further enhances the cyclin d expression,resulting in increased tumor growth and reduction in survival *** has also been observed that in patient samples,VrK2 level was elevated in breast cancer tissue compared to normal breast ***,the isoleucine form of VrK2 exhibited a greater increase in breast cancer ***,it is concluded that VrK2,especially dependent on the 167th variant amino acid,can be one of the indexes of tumor progression and proliferation.

关键词： VrK2 Kinase activity Breast cancer Tumor rNA editing Cell proliferation Cell growth

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Waveguide absorbers based on spiral acoustic black holes for damping vibration in a plate structure 24

Waveguide absorbers based on spiral acoustic black holes for...

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24th International Congress on Acoustics, ICA 2022

作者： Park, Seongmin Lee, Jae Yeon Jeon, Wonju Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Korea Republic of 1st R&D Center Agency for Defense Development Korea Republic of

We propose a waveguide absorber (WGA) based on a spiral acoustic black hole (ABH) to reduce vibration in plates. The geometrical dimensions of the WGA are determined so that it has a lower cut-on frequency than a target frequency by using the impedance method. We also determine the attachment location and direction of the WGA on a plate to maximize its damping performance based on the structural intensity analysis. A couple of WGAs attached to a plate could reduce the mobility of the plate by more than 10 dB. In addition, the WGAs had far less weight but could achieve larger peak reductions compared to thick damping material or spiral ABHs attached to edges. © ICA *** rights reserved

关键词： Acoustic black hole (ABH) Elastic wave Vibration damping

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reverse Laser Assisted Bonding (r-LAB) technology for Chiplet Module Bonding on Substrate

Reverse Laser Assisted Bonding (R-LAB) Technology for Chiple...

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Electronics Packaging technology Conference (EPTC)

作者： SeokHo Na MinHo Gim GaHyeon Kim dongSu ryu dongJoo Park JinYoung Kim Advanced Process & Material Development Global R&D Center Amkor Technology Korea Inc. Incheon Republic of Korea

ISBN: (纸本)9798350398861

There are several chip-to-substrate interconnection technologies in the packaging tool kit such as mass reflow (Mr), thermocompression bonding (TCB) and laser assisted bonding (LAB). Mr is a mature process but has known limitations on fine pitch devices and large/thin substrate packages. TCB has the advantage to minimize bump stress for low-K dielectric devices but its productivity is very low. However, LAB can provide a solution for advanced devices with its localized heating and short bonding time. recently, demand for fine-pitch, Flip Chip bumps and large/thin substrate packages has increased, resulting in industry interest in LAB due to its good quality and high productivity. Amkor technology invented LAB technology in 2014 and passed qualification for multiple devices from customers through many years of development and has been in high volume production for major customers since 2018. However, as the industry continues to require high bonding performance with various new devices, existing LAB technology may not support all these applications. These devices have led to the development of a new bonding concept, which is reverse laser assisted bonding (r-LAB) technology. r-LAB emits the laser to the bottom side of the substrate through a vacuum stage block, which is opposite laser emission direction to existing LAB. It was developed in 2021 by Amkor technology and showed promising results for the packages where top LAB does not work. There are several devices that require r-LAB. One is back side metallization (BSM) die. BSM dies are necessary for metal thermal interface material (TIM) applications for high thermal performance packages. Promising results for BSM die were published in recent 72 nd ECTC [1]. Other devices that require r-LAB include chiplet module bonding on substrate and drAM packaging in an epoxy molding compound (EMC). A chiplet module is necessary for high-performance applications such as servers, networking, artificial intelligence (AI), graphi

关键词： Performance evaluation Productivity Industries Lasers Surface emitting lasers Packaging Electromagnetic compatibility

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Enhancement of CH_(3)CO^(*) adsorption by editing d-orbital states of Pd to boost C–C bond cleavage of ethanol eletrooxidation

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Science China Chemistry 2024年第2期67卷 696-704页

作者： Yuchen Qin Fengqi Wang Pei Liu Jinyu Ye Qian Wang Yao Wang Guangce Jiang Lijie Liu Pengfang Zhang Xiaobiao Liu Xin Zheng Yunlai ren Junjun Li Zhicheng Zhang College of Sciences Henan Agricultural UniversityZhengzhou450000China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin300072China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen361005China Department of Analysis Sinopec Engineering Group Luoyang R&D Center of TechnologyLuoyang471000China School of Chemical and Material Engineering Jiangnan UniversityWuxi214211China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology Liaocheng UniversityLiaocheng252000China

Improving the complete ethanol electrooxidation on Pd-based catalysts in alkaline media has drawn widely attention due to the high mass energy ***,the weak adsorption energy of CH_(3)CO^(*) on Pd restricts the C–C bond *** by the molecular orbital theory,we proposed the d-state-editing strategy to construct more unoccupied d-states of Pd for the enhanced interaction with CH_(3)CO^(*) to break C–C *** expected,the reduced number of e_g electrons and more unoccupied d-states of Pd successfully formed on as-prepared porous rh Au–Pd Cu nanosheets(PNSs).Theoretical calculations show that the optimized d-states of rh Au–Pd Cu PNS can effectively improve the adsorption of CH_(3)CO^(*) and drastically reduce the energy barrier of C–C bond cleavage,thus boosting the complete oxidation of *** charge ratio of C_1 pathway on rh Au–Pd Cu PNSs is 51.5%,more than 2 times higher than that of Pd *** finding provides an innovative perspective for the design of highly-efficient noble-based electrocatalysts.

关键词： C–C bond cleavage CH_(3)CO^(*)adsorption unoccupied d-states ethanol oxidation reaction rhAu–PdCu porous nanosheets

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Qingfei Zhisou oral liquid(清肺止嗽口服液)alleviates fever-induced inflammation by regulating arachidonic acid and lysophospholipids metabolism and inhibiting hypothalamus transient receptor potential ion channels expression

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Journal of Traditional Chinese Medicine 2024年第5期44卷 954-962页

作者： GAO Jiaming ZHANG Yehao Chen Yuanyuan JIN Long ZHAO Jianfeng GUO Hao FU Jianhua Institute of Basic Medical Sciences Xiyuan Hospital of China Academy of Chinese Medical SciencesBeijing 100091China Pharmaceutical R&D Department Taiyuan Yidavike Medical Technology Development Co.Ltd.Taiyuan 030006China

OBJECTIVE:To explore how Qingfei Zhisou oral liquid(清肺止嗽口服液,QFZS)adjusts body temperature bias and the interaction of inflammatory factors levels and metabolomic ***:dry yeast was subcutaneously injected at 10 mL/kg to establish the pyrexia *** randomly divided 60 Sprague-dawley rats into five groups:control,model,positive,low dose of QFZS and high dose of *** proteins were evaluated by Western blotting and *** the examination of the endogenous metabolites,enzyme linked immunosorbent assay and ultra-high-performance liquid chromatography high-resolution mass spectrometry were ***:QFZS significantly reduced rats'body temperature within 6 h after dry yeast injection and reduced the secretion of the arginine vasopressin,cyclic adenosine monophosphate,prostaglandin E-2,tumor necrosis factor-α(TNF-α),interleukin-6(IL-6),and interleukin-1βin ***,we identified 41 metabolites between the model and QFZS groups,including arachidonic acid and *** restored normal arachidonic acid *** on the differential metabolite enrichment analysis,QFZS's antiinflammatory and anti-pyrexia effects might be related to the inflammatory pathway regulated by transient receptor ***,QFZS treatment reduced transient receptor potential melastatin 2 ion channel expression and affected TNF-α,heat shock protein 70,and cyclooxygenase-2 expression in the ***:QFZS exerts its regulatory effects on fever by regulating the metabolism of lysophospholipids and arachidonic acid and the regulation of inflammation via transient receptor potential ion channels channels.

关键词： inflammation fever metabolomics transient receptor potential ion channels Qingfei Zhisou oral liquid

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