检索结果-南通市图书馆

Nano Research 2023年第1期16卷 1441-1447页

作者： Arjen van den Berg Mylène Caruel Matthew Hunt sam Ladak School of Physics and Astronomy Cardiff UniversityCardiffCF243AAUK Institut National des Sciences Appliquées(INSA)of Toulouse 35 Avenue de Rangueil31400 ToulouseFrance

Three-dimensional(3D)nanostructured functional materials are important systems allowing new means for intricate control of electromagnetic properties.A key problem is realising a 3D printing methodology on the nanoscale that can yield a range of functional *** this article,it is shown that two-photon lithography,when combined with laser ablation of sacrificial layers,can be used to realise such a vision and produce 3D functional nanomaterials of complex ***-of-principle is first shown by fabricating planar magnetic nanowires raised above the substrate that exhibit controlled domain wall injection and ***,3D artificial spin-ice(3DASI)structures are fabricated,whose complex switching can be probed using optical *** show that by careful analysis of the magneto-optical Kerr effect signal and by comparison with micromagnetic simulations,depth dependent switching information can be obtained from the 3DASI *** work paves the way for new materials,which exploit additional physics provided by non-trivial 3D geometries.

关键词： three-dimensional(3D)nanomagnetism 3D lithography 3D artificial spin ice sacrificial layers magneto-optical Kerr effect

Very early onset perinatal constipation:Can it be cow’s milk protein allergy?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

世界胃肠病学杂志:英文版 2023年第33期29卷 4920-4926页

作者： Rajalakshmy Arakoni Hebat Kamal sam Xianjun Cheng Department of Pediatrics University of Florida Shands Children's HospitalGainesvilleFL 32608United States Department of Pediatric Gastroenterology Hepatologyand NutritionUniversity of Florida Shands Children's HospitalGainesvilleFL 32608United States

Delayed passage of meconium or constipation during the perinatal period is traditionally regarded as a signal to initiate further work up to evaluate for serious diagnoses such as Hirschsprung’s disease(HD),meconium ileus due to Cystic Fibrosis,*** diagnosis of HD particularly warrants invasive testing to confirm the diagnosis,such as anorectal manometry or rectal suction *** if there was another etiology of perinatal constipation,that is far lesser known?Cow’s milk protein allergy(CMPA)is often diagnosed in infants within the first few weeks of life,however,there are studies that show that the CMPA allergen can be passed from mother to an infant in-utero,therefore allowing symptoms to show as early as day one of *** presentation is more atypical,with perinatal constipation rather than with bloody stools,diarrhea,and *** diagnosis and management would be avoidance of cow's milk protein within the diet,with results and symptom improvement in patients ***,we discuss whether an alternative pathway to address perinatal constipation should be further discussed and implemented to potentially avoid invasive techniques in *** entails first ruling out CMPA with safe,noninvasive techniques with diet modification,and if unsuccessful,then moving forward with further diagnostic modalities.

关键词： Delayed passage of meconium Perinatal constipation Cow's milk protein allergy In-utero Alternate pathway Hirschsprung’s disease

Adaptive Controller Design for Dynamic Maneuvers of High Speed Underwater Vehicles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Ocean Engineering 2022年第2期36卷 311-321页

作者： Bui Duc Hong PHUC sam-Sang YOU Phuc Thinh DOAN Sang-Do LEE Department of Mechanical Engineering The University of TulsaTulsaOK 74104USA Division of Mechanical Engineering Korea Maritime and Ocean UniversityBusan 49112Republic of Korea Institute of Interdisciplinary Social Sciences Nguyen Tat Thanh UniversityHo Chi Minh CityVietnam Division of Navigation and Information System Mokpo National Maritime UniversityMokpoJeollanam-do 58628Republic of Korea

The control synthesis of the high-speed underwater vehicle faces many technical challenges due to its inherent structure and surrounding operational *** this paper,the dynamical behavior is firstly described through a bifurcation analysis to give some insights for robust control *** a novel adaptive fractional-order sliding mode controller(AFOSMC)is realized to effectively manipulate the supercavitating vehicle against payload changes,nonlinear planing force,and external *** fractional order(FO)calculus can offer more flexibility and more freedom for tuning active control synthesis than the integer-order *** addition,the adaptation law has been presented to directly handle the payload change *** stability of the controlled vehicle system is proven via Lyapunov stability ***,the dynamic performance of the proposed controller is verified through extensive simulation results,which demonstrate the control accuracy with faster responses compared with existing integer-order ***,the proposed fractional order controllers can provide higher performance than their integer order counterparts with control algorithms.

关键词： fractional order calculus supercavitating underwater vehicles planing force payload change adaptive sliding mode control

Cost and Efficiency Analysis of Steganography in the IEEE 802.11ah IoT Protocol

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第8期72卷 3929-3943页

作者： akram A.Almohammedi Vladimir Shepelev sam Darshi Mohammed Balfaqih Fayad Ghawbar Automobile Transportation Department South Ural State UniversityChelyabinsk454080Russia Electrical and Electronics Engineering Department Karabük University Karabük78050Turkey Department of Electrical Engineering Indian Institute of Technology RoparPunjab140001India Department of Computer and Network Engineering University of JeddahJeddah23218Saudi Arabia Faculty of Engineering Technology University Tun Hussein Onn MalaysiaPagoh Campus86400Malaysia

The widespread use of the Internet of Things(IoT)applications has enormously increased the danger level of data leakage and theft in IoT as data transmission occurs through a public *** a result,the security of the IoT has become a serious challenge in the field of information *** on the network is a critical tool for preventing the leakage of private information and enabling secure and encrypted *** primary purpose of steganography is to conceal sensitive information in any form of media such as audio,video,text,or photos,and securely transfer it through wireless *** this paper,we analyse the performance characteristics of one of the steganography techniques called Hidden Communication System for Corrupted Networks(HCCNETs)for hiding sensitive *** performance analysis includes the efficiency and the cost of the system in Wireless Local Area Networks(WLANs),specifically in the IEEE 802.11ah IoT *** analysis is mainly based on a two-dimensional Markov chain model in the presence of an error ***,the model considers packet arrival rate,back-off timer freezing,back-off stages,and short retry limit to ensure compliance with IEEE 802.11ah *** stresses the importance of taking these elements into consideration while modeling the efficiency and cost of the steganographic channel *** parameters often result in a high precise channel access estimation,a more accurate and efficient accuracy measurements system,efficient channel utilisation,avoidance of throughput saturation overestimation,and ensuring that no packet is served *** results demonstrate that HCCNETs is an effective approach at low cost.

关键词： IoT HCCNETs steganography markov chain model

The prevalence,associated factors,and impact of urinary incontinence in pregnant and postpartum women in Nanjing,China:A cross-sectional study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Urology 2023年第3期10卷 337-343页

作者： Xiaowei Yang Lynn Sayer sam Bassett Sue Woodward King’s College London Department of Florence Nightingale Faculty of NursingMidwifery and Palliative CareLondonUnited Kingdom Nanjing Vocational Health College Department of Clinical Teaching and ResearchNanjingChina

Objective:Urinary incontinence(UI)is highly prevalent in antenatal and postnatal women while the prevalence of UI varied largely from 3.84%to 38.65%.This study was to assess the prevalence of UI,the associated factors,and the impact of UI on daily life in pregnant and postpartum women in Nanjing,***:The prevalence of UI and the impact of UI on life were assessed by the validated Chinese version of International Consultation on Incontinence Questionnaire-urinary incontinence-short form and the validated Chinese version of urinary incontinence quality of *** associated factors were estimated by using logistic regression ***:UI affected 37.80%of pregnant women and 16.41%of postpartum women of the study *** the pregnant participants,the prevalence rates of stress UI,urge UI,and mixed UI were 25.77%,4.47%,and 7.10%,*** the postpartum women,the prevalence rates of stress UI,urge UI,and mixed UI were 11.15%,1.92%,and 2.69%,*** both pregnant women and postpartum women,vaginal delivery had significantly increased the odds of reporting UI(p=0.007,p=0.003,respectively).The impact of UI on daily life was significantly greater in postpartum women compared to pregnant women especially in social embarrassment(p=0.000).Conclusion:The prevalence rates of UI were high in pregnant women in Nanjing,*** delivery significantly increased odds of reporting *** has a great impact on pregnant and postpartum women’s life,especially in social embarrassment.

关键词： Postpartum women Pregnant women Prevalence Risk factor Urinary incontinence

Supersonically sprayed self-aligne d rGO nanosheets and ZnO/ZnMn_(2)O_(4)nanowires for high-energy and high-power-density supercapacitors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第6期137卷 193-204页

作者： Chanwoo Park Edmund samuel Byeong-Yeop Kim Seongpil An Hae-Seok Lee sam S.Yoon School of Mechanical Engineering Korea UniversitySeoul 02841Republic of Korea Energy Environment Policy and Technology Graduate School of Energy and Environment(KU-KIST Green School)Korea UniversityRepublic of Korea SKKU Advanced Institute of Nanotechnology(SAINT)and Department of Nano Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Core-shell-type bimetallic oxide and carbon composites comprising zinc oxide(ZnO)nanospheres and zinc manganese oxide(ZnMn_(2)O_(4))nanowires were produced by a hydrothermal method,and supersoni-cally sprayed together with reduced graphene oxide(rGO)nanosheets onto Ni foil to fabricate flexible *** supersonic impact facilitated the exfoliation of the rGO nanosheets,thereby increasing the surface area and adhesion of the composite particles to the *** rGO nanosheets were vertically aligned during the supersonic impact and formed localized zones,enabling optimal accommodation of the ZnO/ZnMn_(2)O_(4)*** localization,with the addition of rGO,reduced the agglomeration of ZnO/ZnMn_(2)O_(4)*** molar concentration of MnSO_(4)used in the synthesis of ZnO/ZnMn_(2)O_(4)was varied from 0.05 to 0.15 mol/L to determine the optimal MnSO_(4)concentration that would result in the highest energy storage *** unique nanostructure of ZnO/ZnMn_(2)O_(4)and the self-alignment of rGO sheets facilitated a favorable environment for high energy storage capability with a specific capaci-tance of 276.3 mF·cm^(−2)at a current density of 0.5 mA·cm^(−2)and an energy density of 98.2μWh·cm^(−2)at a power density of 1600μW·cm^(−2).The width of the potential window was increased to 1.2 V,imply-ing a significant increase in the energy storage capability of the *** retention of 88%was achieved after 10,000 charge/discharge cycles for the supercapacitor fabricated using an optimal MnSO_(4)concentration(0.10 mol/L)during the composite synthesis.

关键词： ZnO/ZnMn_(2)O_(4)nanowires rGO nanosheets Hydrothermal method Supersonic spraying Supercapacitor

Accelerated prediction of atomically precise cluster structures using on-the-fly machine learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

npj Computational Materials 2022年第1期8卷 1644-1653页

作者： Yunzhe Wang Shanping Liu Peter Lile sam Norwood Alberto Hernandez Sukriti Manna Tim Mueller Department of Materials Science and Engineering Johns Hopkins UniversityBaltimoreMD21218USA

The chemical and structural properties of atomically precise nanoclusters are of great interest in numerous applications,but predicting the stable structures of clusters can be computationally *** this work,we present a procedure for rapidly predicting low-energy structures of nanoclusters by combining a genetic algorithm with interatomic potentials actively learned *** this approach to aluminum clusters with 21 to 55 atoms,we have identified structures with lower energy than any reported in the literature for 25 out of the 35 *** benchmarks indicate that the active learning procedure accelerated the average search speed by about an order of magnitude relative to genetic algorithm searches using only density functional *** work demonstrates a feasible way to systematically discover stable structures for large nanoclusters and provides insights into the transferability of machine-learned interatomic potentials for nanoclusters.

关键词： precise atomic cluster

Wearable sensors and supercapacitors using electroplated-Ni/ZnO antibacterial fabric

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第5期100卷 254-264页

作者： Taegun Kim Chanwoo Park Edmund P.samuel Yong-Il Kim Seongpil An sam S.Yoon School of Mechanical Engineering Korea UniversitySeoul 02841Republic of Korea KU-KIST Green School Korea UniversitySeoul 136-713Republic of Korea SKKU Advanced Institute of Nanotechnology(SAINT)and Department of Nano Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Herein,nickel nanocones and zinc oxide nanosheets were electroplated onto a fabric to produce multifunctional(wearable,stretchable,washable,hydrophobic,and antibacterial)materials with sensing,heating,and supercapacitive *** these functionalities are integrated into a one-layered fabric that can be used as a portable intelligent electronic textile for potential application in healthcare monitoring,smart sportswear,and energy *** nickel enhances the electrical conductivity and thus increases the electron charge transfer for supercapacitor *** integration of ZnO with the Ni-plated fabric provides pseudocapacitance via redox reactions with the *** resistance of the Ni/ZnO fabric changes in response to external stimuli such as temperature and *** voltage is applied,the fabric generates heat through Joule heating,demonstrating its potential application as winter *** superior mechanical durability of the fabric was confirmed through bending and stretching *** hydrophobic surface prevents viruses contained in liquid droplets from infiltrating the *** addition,bacterial growth is inhibited because of the antibacterial properties of the Ni/ZnO fabric and because of Joule *** one-layered fabric integrated with such multiple functionalities is expected to be applicable in the development of next-generation portable and wearable electronic textiles in various industries.

关键词： Multifunctional conductive fabric Fabric supercapacitor Fabric heater Thermal and strain sensors Electroplating

A federated learning scheme meets dynamic differential privacy

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CAAI Transactions on Intelligence Technology 2023年第3期8卷 1087-1100页

作者： Shengnan Guo Xibin Wang Shigong Long Hai Liu Liu Hai Toong Hai sam State Key Laboratory of Public Big Data College of Computer Science and TechnologyGuizhou UniversityGuiyangChina School of Big Data Key Laboratory of Electric Power Big Data of Guizhou ProvinceGuizhou Institute of TechnologyGuiyangChina School of Information Guizhou University of Finance and EconomicsGuiyangChina Faculty of Business and Communication INTI International UniversityNilaiMalaysia

Federated learning is a widely used distributed learning approach in recent years,however,despite model training from collecting data become to gathering parameters,privacy violations may occur when publishing and sharing models.A dynamic approach is pro-posed to add Gaussian noise more effectively and apply differential privacy to federal deep ***,it is abandoning the traditional way of equally distributing the privacy budget e and adjusting the privacy budget to accommodate gradient descent federation learning dynamically,where the parameters depend on computation derived to avoid the impact on the algorithm that hyperparameters are created *** also incorporates adaptive threshold cropping to control the sensitivity,and finally,moments accountant is used to counting the∈consumed on the privacy‐preserving,and learning is stopped only if the∈_(total)by clients setting is reached,this allows the privacy budget to be adequately explored for model *** experimental results on real datasets show that the method training has almost the same effect as the model learning of non‐privacy,which is significantly better than the differential privacy method used by TensorFlow.

关键词： data privacy machine learning security of data

Observed-based decision-making strategy of supply chain management under business disruptions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Control and Decision 2023年第4期10卷 504-513页

作者： Xiao Xu Truong Ngoc Cuong Hwan-Seong Kim sam-Sang You Antai College of Economics and Management Shanghai Jiao Tong UniversityShanghaiPeople’s Republic of China Division of Logistics Korea Maritime and Ocean UniversityBusanRepublic of Korea Division of Mechanical Engineering Korea Maritime and Ocean UniversityBusanRepublic of Korea

This paper presents observer-based chaos suppression for a four-echelon supply chain system based on fractional order *** the market information is usually distorted,nonlinear observers for supply chain model are implemented to accomplish chaos suppression using linear matrix inequality(L MI).Sufficient conditions for the observer-based schemes are estab-lished by using Lyapunov stbility *** fractional calculus is utilised to provide superior dynamic performance for the controlled supply chain system over its integer-order *** simulations are performed to validate robust performance and stability of observer-based supply chain ***,it is found that the presented approach can help decision-makers develop effective supply chain networks under disruptions.

关键词： Supply chain system decision making fractional order calculus state observer chaos suppression linear matrix inequality