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Bio-inspired Filter design Based on Vortex Control Mechanism of Parallel Groove Structure

Journal of Bionic engineering 2023年第1期20卷 338-348页

作者： Yawei Zhu Dean Hu Yonggang Guo Hao Ding Gang Yang School of Mechanical and Electrical Engineering Henan University of TechnologyZhengzhou450001China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipments Ministry of EducationHunan UniversityChangsha410082China

Solid–liquid separation is widely used in daily life and practical *** industrial filters are prone to clogging,but this rarely occurs in filter-feeding *** by the filter feeding mechanism of balaenid whales and considering the local grooves in the fringes layer,a new bionic filter is produced by 3D printing technology through the bionic design of the parallel channels inside the mouth of balaenid *** the same time,a test platform composed of the bionic filter,peristaltic pump,fluid pulse rectifier and water tank is built to carry out the fluid flow pattern dyeing and particle filtration *** is found that fluid separation occurs near the groove structure and local vortices are *** vortex control filtration mechanism makes the particles in the front grooves tend to accumulate on the left side,which has a certain anti-clogging ***,the increase of flow velocity leads to the enhancement of vortices,which makes the accumulation effect on the left more *** study initially practices the bionic application from biological model to engineering design,and the vortex control anti-clogging filtration mechanism proposed in the study has a wide range of application prospects and values.

关键词： Solid-liquid separation Balaenid whales Filter feeding-Bionic design Anti-clogging filtration mechanism

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MoS_(2)/Si tunnel diodes based on comprehensive transfer technique

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Chinese Physics B 2023年第1期32卷 106-112页

作者：朱翊吕红亮张玉明贾紫骥孙佳乐吕智军芦宾 School of Microelectronics Xidian UniversityThe State Key Discipline Laboratory of Wide Band Gap Semiconductor TechnologyXi'an 710071China Department of Integrated Circuit Design Institute of Microelectronics TechnologyXi'an 710071China School of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030031China

Due to the pristine interface of the 2D/3D face-tunneling heterostructure with an ultra-sharp doping profile, the 2D/3D tunneling field-effect transistor(TFET) is considered as one of the most promising low-power devices that can simultaneously obtain low off-state current(IOFF), high on-state current(ION) and steep subthreshold swing(SS). As a key element for the 2D/3D TFET, the intensive exploration of the tunnel diode based on the 2D/3D heterostructure is in urgent *** transfer technique composed of the exfoliation and the release process is currently the most common approach to fabricating the 2D/3D heterostructures. However, the well-established transfer technique of the 2D materials is still *** a small part of the irregular films can usually be obtained by mechanical exfoliation, while the choice of the chemical exfoliation may lead to the contamination of the 2D material films by the ions in the chemical etchants. Moreover, the deformation of the 2D material in the transfer process due to its soft nature also leads to the nonuniformity of the transferred film,which is one of the main reasons for the presence of the wrinkles and the stacks in the transferred film. Thus, the large-scale fabrication of the high-quality 2D/3D tunnel diodes is limited. In this article, a comprehensive transfer technique that can mend up the shortages mentioned above with the aid of the water and the thermal release tape(TRT) is proposed. Based on the method we proposed, the MoS_(2)/Si tunnel diode is experimentally demonstrated and the transferred monolayer MoS_(2) film with the relatively high crystal quality is confirmed by atomic force microscopy(AFM), scanning electron microscopy(SEM), and Raman characterizations. Besides, the prominent negative differential resistance(NDR) effect is observed at room temperature, which verifies the relatively high quality of the MoS_(2)/Si heterojunction. The bilayer MoS_(2)/Si tunnel diode is also experimentally fabricated

关键词： 2D/3D heterostructure transfer technique tunnel diode MoS_(2)/Si

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Glycine functionalized activated carbon derived from navel orange peel for enhancement recovery of Gd(Ⅲ)

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Journal of Rare Earths 2022年第11期40卷 1794-1802,I0005页

作者： Bin Xiao Lijinhong Huang Wanfu Huang Dongmei Zhang Xiangrong Zeng Xiaohui Yao School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Jiangxi College of Applied Technology Ganzhou 341000China Faculty of Science and Engineering WA School of Mines:MineralsEnergy and Chemical EngineeringCurtin UniversityWAAustralia School of Architecture and Design Jiangxi University of Science and TechnologyGanzhou 341000China

Glycine functionalized activated carbon adsorption material(NOPAC-GLY-X)was successfully prepared by one-step thermal decomposition using agricultural waste navel orange peel as a *** batch adsorption experiments,it is found that the adsorption performance of Gd(Ⅲ)on activated carbon can be significantly enhanced by glycine *** adsorption isotherms of the NOPACs conform to the Langmuir isotherm model,and the maximum adsorption capacity of the activated carbon sample NOPAC-Gly-60 is approximately 48.5 mg/*** Gd(Ⅲ)adsorption capacity of navel orange peel activated carbon can be doubled after glycine modification,and the adsorption efficiency of gadolinium can reach99%at pH=*** physicochemical properties of the prepared adsorbents were characterized by Brunauer-Emmett-Teller(BET),Fourier transform infrared spectroscopy(FTIR),elemental analysis(EA),and X-ray photoelectron spectroscopy(XPS).The characterization test shows that the specific surface area of the sample increases from 1121 to 1523 m^(2)/g,and the ratio of(N+O)/C increases from 10.8%to 30.0%by the glycine *** five cycles of adsorption-desorption,the adsorption capacity can still be maintained at 88%of the initial ***-GLY-60 has excellent adsorption selectivity for Gd(Ⅲ).With the obvious advantages of simple synthesis steps and low cost,the activated carbon modification method adopted in this study has great application value in the field of rare earth adsorption and recovery.

关键词： Glycine functionalized One-step thermal decomposition Navel orange peel Gd(Ⅲ)adsorption Rare earths

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Collection-As-A-Service to Incentivize On-Orbit Servicing in LEO

Collection-As-A-Service to Incentivize On-Orbit Servicing in...

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AIAA Science and technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Bowne, Madeline du Jonchay, Tristan Sarton Mavris, Dimitri School of Aerospace Engineering Aerospace Systems Design Lab Georgia Institute of Technology AtlantaGA30332 United States Aerospace Systems Design Lab Georgia Institute of Technology AtlantaGA30332 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

The space industry is consistently at the forefront of technology, inspiring generations and improving human knowledge. The very industry that put people on the moon and gazes into the depths of space could also be one of the first industries to embrace circular economies. Low Earth Orbit (LEO) is home to an increasing number of mega-constellations, increasing orbital congestion amidst the worsening state of orbital debris. De-orbiting satellites at the end of their life is presently the best practice, but scientists are starting to recognize the environmental toll that de-orbiting satellites may take on the upper atmosphere. A sustainable space economy, featuring refuel depots and in-orbit servicers, would not only reduce the atmospheric pollution associated with de-orbiting satellites, but also expand our capacity for future space exploration as we improve our use of resources in a resource-starved environment. Space debris is a known problem and atmospheric pollution is a potential problem;improving the case for In-Space Servicing, Assembly, and Manufacturing (ISAM) in LEO could mitigate both. Despite the need for improved sustainability in LEO, there is little interest in ISAM for LEO. ISAM in geosynchronous orbit (GEO) is currently more attractive since GEO satellites are more expensive, have longer life cycles, and have very long orbital decay rates. ISAM in LEO would require several modifications due to inefficient maneuvering and the nature of profilerated customer constellations. There are several ISAM CONOPs and infrastructure elements that may improve the case for ISAM in LEO and ultimately promote space sustainability. This paper introduces a novel concept for collection-as-a-service (CAAS) combined with multi-echelon sparing, which could provide the economies of scale and flexibility necessary to jump-start LEO-based ISAM. To assess the viability of CAAS, this paper develops a flexibility framework that utilizes a discrete event simulation with customer

关键词： Orbits

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Interpreting Healthcare Insights: The Power of Explainable AI and Enhanced Data Analysis 8th

Interpreting Healthcare Insights: The Power of Explainable A...

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8th International Conference on Information and Communication technology for Intelligent Systems, ICTIS 2024

作者： Makubhai, Shahin Pathak, Ganesh R. Chandre, Pankaj R. Department of Computer Engineering MIT School of Computing MIT Art Design and Technology University Loni Kalbhor Pune India

ISBN: (纸本)9789819766833

Background. This study explores the potential of Explainable AI (XAI) and Enhanced Data Analysis in improving the understanding and trustworthiness of AI models. Methods: The research focuses on integrating XAI techniques with machine learning models to provide interpretable explanations for predictions. Additionally, advanced data analysis methods are employed to gain deeper insights into the dataset and its impact on model performance. Findings: The findings highlight the benefits of XAI in enhancing model interpretability and guiding decision-making processes. Novelty and applications: Moreover, the study underscores the significance of transparent AI systems for various domains, promoting ethical use and fostering wider adoption of AI technologies. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Data assimilation

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Identifying Precursors to Flight Safety Events: A Comparative Analysis of Machine Learning Models Using FOQA Data

Identifying Precursors to Flight Safety Events: A Comparativ...

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AIAA Aviation Forum and ASCEND, 2024

作者： Da Silva Duarte, Noe Lepez Ravikanti, Balaji Bhanpato, Jirat Gautier, Raphael H. Kirby, Michelle R. Mavris, Dimitri N. Aerospace Systems Design Laboratory School of Aerospace Engineering Georgia Institute of Technology AtlantaGA30332 United States

ISBN: (数字)9781624107160

ISBN: (纸本)9781624107160

As the aviation industry returns to pre-pandemic levels and faces projected growth, with expectations to nearly double by 2040, it must address new challenges and opportunities by enhancing safety and reliability initiatives. This study explores machine learning algorithms to predict flight safety events, specifically focusing on unstable approaches. We test logistic regressions, long short-term memory networks, random forests, and support vector machines, and identify feature importances across models to pinpoint predictors to unstable approaches. Predictor identification aims to deepen insights into operational risks by identifying key correlations between flight parameters and safety events. Our results indicate that Random Forest models consistently outperform other algorithms in detecting unstable approaches across various airframes, efficiency in handling high-dimensional, imbalanced data. Feature importance analysis reveals that airspeed, glideslope deviation, flap position, and thrust are critical precursors for predicting unstable approaches, which can be explained by the higher average feature values and variability during unstable approaches. Future research should explore improved data augmentation techniques, refine machine learning model architectures, and extend the scope to include multiple flight safety events for a comprehensive safety management strategy. © 2024, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Random forests

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Stochastic Evolutionary Game among the Government, Vehicle Enterprises and Consumers under the Background of Carbon Trading 7

Stochastic Evolutionary Game among the Government, Vehicle E...

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7th IEEE International Conference on Transportation Information and Safety, ICTIS 2023

作者： Xin, Yuxuan Zhu, Haojie Wang, Fengyan Feng, Chen Du, Jiaying Zhou, Dingwen Wuhan University of Technology School of Transportation and Logistics Engineering Wuhan China Wuhan University of Technology School of Art and Design Wuhan China

ISBN: (纸本)9798350308532

The launch of the carbon emissions trading market has made China one of the largest carbon trading markets around the world. Currently, the carbon regulation policy mainly focuses on new energy vehicle enterprises in the upstream, disengaging the incentive and management of consumers in the downstream. The lack of linkage between new energy vehicle enterprises and consumers makes the overall incentive effect of carbon trading policy on the production and consumption of new energy vehicles works limited. Therefore, this paper employs a stochastic evolutionary game to study the interaction among new energy vehicle enterprises, consumers, and local governments. It studies the evolution of the three parties through numerical simulation, obtaining the key parameters that influence the evolution. Based on that, it proposes optimization proposals and methods to achieve emission reduction. It enriches the research on the evolutionary game and provides management measures to reduce emissions under carbon trading. © 2023 IEEE.

关键词： Emission control

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Research on the farthest scattering distance of blasting flying stones based on improved WOA-BP neural network 2

Research on the farthest scattering distance of blasting fly...

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2nd International Conference on Image Processing, Computer Vision and Machine Learning, ICICML 2023

作者： Ning, Fangpeng Xu, Huarong Weng, Lifen Xiamen Institute of Technology School of Computer and Information Engineering Xiamen China Xiamen Institute of Technology School of Design and Art Xiamen China

ISBN: (纸本)9798350331417

The flying rocks in mining blasting operations pose a great threat to safety production, and the reasonable division of safety blasting scope is of great significance for production operations. In response to the problem of the farthest scattering distance of flying rocks in mining blasting operations, based on the excellent nonlinear mapping ability of BP neural network and mature research on its theory and application, WOA (whale optimization algorithm) is used to optimize the BP neural network, improving its weak global search ability and poor anti-interference ability. And adaptive weight adjustment is introduced, and an improved WOA-BP neural network model is applied to predict the farthest scattering distance of flying rocks in mining blasting. The minimum burden of blasting, unit consumption of blasting explosives, and maxi-mum charge weight of a single hole, which have a greater impact on the distance of flying rocks during blasting operation, are selected as input variables. The experimental results show that the average absolute error MAE, mean square error MSE, root mean square error RMSE, and average absolute percentage error MAPE of the improved WOA-BP model are 0.52283, 0.60303, 0.77655, and 2.8102%, respectively, which are better than the comparison model, indicating that the prediction accuracy of the model is high, it can provide guidance for actual mine blasting production. © 2023 IEEE.

关键词： Adaptive weight Blasting flying stone BP neural network component Mine blasting WOA

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design of Magnetic Tactile Sensor Arrays for Intelligent Floorboard Based on the Demand of Older People

Design of Magnetic Tactile Sensor Arrays for Intelligent Flo...

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Chinese Intelligent Automation Conference, CIAC 2023

作者： Wang, Lu Weng, Ling Wang, Bowen School of Architecture and Art Design Hebei University of Technology Tianjin China School of Electrical Engineering Hebei University of Technology Tianjin China

ISBN: (纸本)9789819961863

The need for home-based eldercare has grown as China’s population ages, and concerns related to improving older people’s quality of life, such as designing supplementary intellectual tools and assisting mobility, are gaining prominence. The sense of touch is an essential capability for humans to explore the ambient environment. The magnetic sensor array for detecting the fall of fragile elderly has been built in this case to meet the needs of older individuals. The testing results reveal that the magnetic tactile sensor arrays mounted on intelligent floors can detect the fall of elders. The sensor arrays, installed on the floorboard, are put on the path ground where the elderly often walk, such as the bedroom and toilet path floors, to detect whether the elderly have fallen. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2023.

关键词： Floors

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Nanoimprint lithography-assisted block copolymer self-assembly for hyperfine fabrication of magnetic patterns based on L10-FePt nanoparticles

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Science China Chemistry 2025年第5期68卷 2027-2034页

作者： Jie Zhang Yi Chen Guijun Li Zelin Sun Zhengong Meng Wai-Yeung Wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University The Hong Kong Polytechnic University Shenzhen Research Institute Division of Integrative Systems and Design and Department of Electronic and Computer EngineeringThe Hong Kong University of Science and Technology School of Flexible Electronics (Future Technology) and Institute of Advanced Materials (IAM) Nanjing Tech University

L10-FePt-type bit-patterned media has provided a promising alternative for ultrahigh-density magnetic recording systems in the current digital era, but rapid fabrication of magnetic patterns with hyperfine bit islands is still challenging, especially with the target for miniaturization and scalable production simultaneously. Herein, Fe,Pt-containing block copolymers were utilized as single-source precursors for solution-processable patterning and subsequent generation of the demanding magnetic FePt dots by in situ pyrolysis. High-throughput nanoimprint lithography was initially employed to fabricate the predefined bit cells precisely,and then the intrinsic self-assembly of phase-separated block copolymers further drove the formation of accurate bit *** from the synergistic effect of top-down lithographic approach and bottom-up self-assembly, the customizable patterns could be achieved for large-scale mass production in targeted areas, but high-density isolated dots could also be accurately aligned along the patterned features after subsequent self-assembly. This reliable strategy would provide a good avenue to precisely construct ultrahigh-density magnetic data storage devices.

关键词： organometallic precursor magnetic nanoparticles block copolymer self-assembly nanoimprint lithography

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