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User Association in Ultra-Dense Small Cell Dynamic Vehicular Networks: A Reinforcement Learning Approach

Journal of Communications and Information Networks 2019年第1期4卷 1-12页

作者： Shipra Kapoor david grace Tim Clarke Department of Electronic Engineering University of YorkYO105DDUnited Kingdom

Network densification is envisioned as one of the key enabling technologies in the next generation and beyond wireless networks to satisfy the demand of high coverage and capacity whilst deliver an ultra-reliable low latency communication services especially to the users on the *** of the fundamental tasks in wireless networks is user *** the case of ultra-dense vehicular networks,due to the dense deployment and small coverage of the eNodeBs,there may be more than one eNodeB that may simultaneously satisfy the conventional maximum radio signal strength user association *** addition to this,the spatial-temporal vehicle distribution in dynamic environments contribute significantly towards the rapidly changing radio environment that substantially impacts the user association,therefore,the network performance and user *** paper addresses the problem of user association in dynamic environments by proposing intelligent user association approach,variable-reward,quality-aware Q-learning(VR-QAQL)that has an ability to strike a balance between the number of handovers per transmission and system performance whilst a guaranteed network quality of service is *** VR-QAQL technique integrates the control-theoretic concepts and the reinforcement learning approach in an LTE uplink,using the framework of an urban vehicular *** algorithm is assessed using large-scale simulation on a highway scenario at different vehicle speeds in an urban *** results demonstrate that the proposed VR-QAQL algorithm outperforms all the other investigated approaches across all mobility levels.

关键词： 5G access protocols adaptive algorithm control design dynamic range handover machine learning algorithms multiagent systems radio access networks uplink user centered design

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COOPERATIVE DIRECTIONAL INTER-CELL HANDOVER SCHEME IN HIGH ALTITUDE PLATFORM COMMUNICATIONS SYSTEMS

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Journal of Electronics(China) 2011年第2期28卷 249-257页

作者： Li Shufeng Wang Lijie david grace Ma Dongtang School of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China Communications Research Group Department of Electronics University of York Heslington York 11010 5DD United Kingdom

A novel Cooperative Directional inter-cell Handover Scheme(CDHS) for High Altitude Platform(HAP) communications systems is proposed,in which the handover target cell and the two cells adjacent to this handover target cell work cooperatively to exploit the traffic fluctuation to improve handover *** in the overlap area of the overloaded handover target cell will be forced to handover directionally before their optimal handover boundary in order to free up resources for the handover calls which would otherwise be dropped due to the shortage of resources and queue time *** results show that the handover call dropping probability is greatly reduced(at least 60%) compared with the general queue handover scheme,with little performance reduction to the call blocking probability,and the Not in the Best Cell(NBC) average time is only increased ***,an optimal cell radius can be achieved for a specific platform speed by minimizing the unified system performance,which is the linear combination of the handover call dropping probability and the NBC average time.

关键词： Inter-cell Handover High Altitude Platform(HAP) Dropping probability Blocking Probability

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Employing electrochemically derived pH gradients for Lab-on-PCB protein preconcentration devices

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Microsystems & Nanoengineering 2024年第1期10卷 79-87页

作者： grace Maxted Pedro Estrela Despina Moschou Department of Electronic and Electrical Engineering University of BathBath BA27AYUK Centre for Bioengineering and Biomedical Technologies(CBio) University of BathBath BA27AYUK

Protein preconcentration is an essential sample preparation step for analysis in which the targeted proteins exist in low concentrations,such as bodily fluids,water,or ***,very few practical implementations of miniaturized protein preconcentration devices have been demonstrated in practice,and even fewer have been integrated with other microanalytical *** approaches rely heavily on additional chemicals and reagents and introduce complexity to the overall *** this paper,we propose a novel miniaturized isoelectric focusing-based protein preconcentration screening device based on electrochemically derived pH gradients rather than existing chemical reagent *** this way,we reduce the need for additional chemical reagents to zero while enabling device incorporation in a seamlessly integrated full protein analysis microsystem via Lab-on-PCB *** apply our previously presented Lab-on-PCB approach to quantitatively control the pH of a solution in the vicinity of planar electrodes using electrochemical acid generation through redox-active self-assembled *** presented device comprises a printed circuit board with an array of gold electrodes that were functionalized with 4-aminothiophenol;this formed a self-assembled monolayer that was electropolymerized to improve its electrochemical *** preconcentration was performed in two *** first was open and needed the use of a holder to suspend a well of fluid above the electrodes;the second used microfluidic channels to enclose small volumes of *** here are the resulting data for protein preconcentration in both these forms,with a quantitative concentration factor shown for the open form and qualitative proof shown for the microfluidic.

关键词： electrochemical proof qualitative

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Relating estimates of wood properties of birch to stem form, age and species

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Journal of Forestry Research 2024年第3期35卷 1-11页

作者： grace Jones Maria Ulan Mateusz Liziniewicz Johan Lindeberg Stergios Adamopoulos Teagasc Forestry Development Department Ashtown Research CentreDublin 15 D15DY05Ireland Research Institutes of Sweden(RISE) GoteborgSweden The Forest Research Institute of Sweden(Skogforsk) Ekebo 225026890SvalovSweden Department of Forestry and Wood Technology Linnaeus University35195VaxjoSweden Department of Forest Biomaterials and Technology Swedish University of Agricultural SciencesBox 700875007 UppsalaSweden

Birch has long suffered from a lack of active forest management,leading many researchers to use mate-rial without a detailed management *** collected from three birch(Betula pendula Roth,*** Ehrh.)sites in southern Sweden were analyzed using regression analysis to detect any trends or differences in wood proper-ties that could be explained by stand history,tree age and stem *** sites were genetics trials established in the same *** of acoustic velocity(AV)from non-destructive testing(NDT)and predicted AV had a higher correlation if data was pooled across sites and other stem form factors were considered.A subsample of stems had radial profiles of X-ray wood density and ring width by year created,and wood density was related to ring number from the pith and ring *** seemed likely that wood density was negatively related to ring width for both birch *** models had slight improvements if site and species were included,but only the youngest site with trees at age 15 had both birch *** paper indicated that NDT values need to be considered separately,and any predictive models will likely be improved if they are specific to the site and birch species measured.

关键词： Acoustic velocity Non-destructive testing Predictive models Regression analysis Wood density

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Multipath Cognitive Routing in Integrated Multicast Satellite-HAP System Structures

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Journal of Electronic Science and Technology 2011年第1期9卷 41-45页

作者： Mohamed M.Elsokkary Mona M.Riad david grace Electronics and Communication Department Cairo University Communications Research Group University of York

A new multilayered inter satellite-high altitude platform （HAP） system routing algorithm is proposed,which is mainly based on multipath routing to ensure the network *** proposed multipath routing scheme principally relies on splitting the traffic between different paths to make the best utilization of multiple *** programming is the main method used for multipath *** major constraints to the quality of service （QoS）（delay and link utilization） have been taken into account to meet the criteria of the advanced multimedia *** to the effect of link utilization,the system encounters traffic flow oscillation between paths over time,which affects the system ***,to fix this issue,we propose a cognitive routing algorithm which reacts to the long-term changes of the traffic loads rather than short-term *** performance of the proposed routing techniques has been evaluated using appropriate simulation models and implemented by Matlab.

关键词： Cognitive routing multipath routing,satellite-high altitude platform.

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Eco-ableism and access circularity in natural building

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Frontiers of Architectural Research 2024年第2期13卷 235-248页

作者： grace Schleck Lola Ben-Alon Barnard College Department of Architecture New YorkUSA Columbia University Graduate School of Architecture Planningand Preservation(GSAPP)New YorkUSA

The climate crisis disproportionately impacts disabled people. Yet climate-related advocacy, planning, and policymaking often neglect to thoughtfully include disabled people. Responding to this gap, disabled and neurodivergent environmental activists coined the term eco-ableism to describe discrimination and silencing toward disabled and neurodivergent people (i.e., ableism) arising in environmental spaces (i.e., eco-ableism). Relatedly, building operations and construction practices contribute a significant percentage of global, energy-related CO_(2) emissions annually, which calls into question the relationships between the impending climate crisis, disability justice, and architecture. Climate-specific, natural building materials and methods present a potential pathway toward a more sustainable built future: low-carbon, locally sourced, minimally processed, and nontoxic materials. Despite a critical overlap, there is little published research on material access in the production phase and human access in the occupation phase of natural buildings. Applying eco-ableism and material circularity in an architectural framework, this research aims to investigate the gaps and possibilities of access, natural material applications, and resulting US natural buildings informed by scholarship in critical disability studies and semi-structured interviews with natural building professionals.

关键词： Eco-ableism Critical disability studies Climate crisis and architecture Naturalmaterialsand methods

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An adaptive machine learning-based optimization method in the aerodynamic analysis of a finite wing under various cruise conditions

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Theoretical & Applied Mechanics Letters 2024年第1期14卷 27-34页

作者： Zilan Zhang Yu Ao Shaofan Li grace X.Gu Department of Mechanical Engineering University of CaliforniaBerkeley 94720USA Department of Engineering Peking UniversityBeijing 100871China Department of Civil and Environmental Engineering University of CaliforniaBerkeley 94720USA

Conventional wing aerodynamic optimization processes can be time-consuming and imprecise due to the complexity of versatile flight *** of existing literature has considered two-dimensional infinite airfoil optimization,while three-dimensional finite wing optimizations are subject to limited study because of high computational *** we create an adaptive optimization methodology built upon digitized wing shape deformation and deep learning algorithms,which enable the rapid formulation of finite wing designs for specific aerodynamic performance demands under different cruise *** methodology unfolds in three stages:radial basis function interpolated wing generation,collection of inputs from computational fluid dynamics simulations,and deep neural network that constructs the surrogate model for the optimal wing *** has been demonstrated that the proposed methodology can significantly reduce the computational cost of numerical *** also has the potential to optimize various aerial vehicles undergoing different mission environments,loading conditions,and safety requirements.

关键词： Aerodynamic optimization Computational fluid dynamics Radial basis function Finite wing Deep learning neural network

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如何在美国反倾销调查中进行成功辩护

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中国法律（中英文版） 2003年第2期 30-33页

作者： david R.grace 馮瑶美国Covington & Burling律师事务所华盛顿办公室北京市天地和律师事务所

一、简介随着中国生产者在海外市场产品出口上日益取得成功,他们也面对着来自外国竞争者试图保持在这些市场上的优势的冲击。随着贸易关税和非关税壁垒的减少,外国生产者正越来越频繁地求助于他们各自国家的‘非公平贸易法律’。这一点... 详细信息

一、简介随着中国生产者在海外市场产品出口上日益取得成功,他们也面对着来自外国竞争者试图保持在这些市场上的优势的冲击。随着贸易关税和非关税壁垒的减少,外国生产者正越来越频繁地求助于他们各自国家的‘非公平贸易法律’。这一点在美国更为明显。

关键词：美国反倾销调查中国生产者反倾销调查美国国际贸易委员会诉讼

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Cross-comparative review of Machine learning for plant disease detection:apple,cassava,cotton and potato plants

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Artificial Intelligence in Agriculture 2024年第2期12卷 127-151页

作者： James Daniel Omaye Emeka Ogbuju grace Ataguba Oluwayemisi Jaiyeoba Joseph Aneke Francisca Oladipo Department of Computer Science Federal UniversityLokojaNigeria Department of Computer Science Dalhousie UniversityHalifaxCanada Department of Computer Science Hampton UniversityVirginiaUSA

Plant disease detection has played a significant role in combating plant diseases that pose a threat to global agri-culture and food *** these diseases early can help mitigate their impact and ensure healthy crop *** learning algorithms have emerged as powerful tools for accurately identifying and classifying a wide range of plant diseases from trained image datasets of affected *** algorithms,including deep learning algorithms,have shown remarkable success in recognizing disease patterns and early signs of plant *** early detection,there are other potential benefits of machine learning algorithms in overall plant disease management,such as soil and climatic condition predictions for plants,pest identification,proximity detection,and many *** the years,research has focused on using machine-learning algorithms for plant disease ***,little is known about the extent to which the research community has ex-plored machine learning algorithms to cover other significant areas of plant disease *** view of this,we present a cross-comparative review of machine learning algorithms and applications designed for plant dis-ease detection with a specific focus on four(4)economically important plants:apple,cassava,cotton,and *** conducted a systematic review of articles published between 2013 and 2023 to explore trends in the research community over the *** filtering a number of articles based on our inclusion criteria,including articles that present individual prediction accuracy for classes of disease associated with the selected plants,113 articles were considered *** these articles,we analyzed the state-of-the-art techniques,challenges,and future prospects of using machine learning for disease identification of the selected *** from our re-view show that deep learning and other algorithms performed significantly well in detecting plant *** addition,we fou

关键词： Machine learning Plant diseases Agriculture Plant disease management Convolutional neural networks

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Primary care providers practice patterns regarding female pelvic floor disorders

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Family Medicine and Community Health 2024年第1期12卷 9-15页

作者： Anna Weimer Jennifer L Hallock Chi Chiung grace Chen Magee-Women's Hospital of UPMC PittsburghPennsylvaniaUSA Kaiser Permanente Northern California SacramentoCaliforniaUSA Johns Hopkins Medical Institutions Campus BaltimoreMarylandUSA

Introduction Pelvic floor disorders(PFDs)pose substantial physical and psychological burdens for a growing number of *** the ubiquity of these conditions and known patient reluctance to seek care,primary care providers(PCPs)have a unique opportunity to increase treatment and provide appropriate referrals for these *** An online survey was administered to PCPs to assess provider practices,knowledge,comfort managing and ease of referral for *** regression was used to assess the association between demographic/practice characteristics of PCPs and two primary outcomes of interest:discomfort with management and difficulty with referral of *** Of the 153 respondents to the survey,more felt comfortable managing stress urinary incontinence(SUI)and overactive bladder(OAB),compared with pelvic organ prolapse(POP)and faecal incontinence(FI)and were less likely to refer patients with urinary *** providers elicited symptoms for POP and FI as compared with SUI and *** variables that were significantly associated with discomfort with management varied by PFD,but tended to correlate with less exposure to PFDs(eg,those with fewer years of practice,and internal medicine and family physicians as compared with geriatricians);whereas the factors that were significantly associated with difficulty in referral,again varied by PFD,but were related to practice characteristics(eg,specialist network,type of practice,practice setting and quantity of patients).Conclusion These findings highlight the need to increase PCPs awareness of PFDs and develop effective standardised screening protocols,as well as collaboration with pelvic floor specialists to improve screening,treatment and referral for patients with PFDs.

关键词： bladder floor difficulty

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