检索结果-南通市图书馆

Energy-efficient joint UAv secure communication and 3D trajectory optimization assisted by reconfigurable intelligent surfaces in the presence of eavesdroppers

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

Defence Technology（防务技术） 2024年第1期31卷 537-543页

作者： Huang Hailong Mohsen Eskandari andrey v.savkin Wei Ni The Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong KongChina School of Electrical Engineering and Telecommunications University of New South WalesSydney2052Australia Data61 CSIROAustralia

We consider a scenario where an unmanned aerial vehicle(UAv),a typical unmanned aerial system(UAS),transmits confidential data to a moving ground target in the presence of multiple *** friendly reconfigurable intelligent surfaces(RISs) help to secure the UAv-target communication and improve the energy efficiency of the *** formulate an optimization problem to minimize the energy consumption of the UAv,subject to the mobility constraint of the UAv and that the achievable secrecy rate at the target is over a given *** present an online planning method following the framework of model predictive control(MPC) to jointly optimize the motion of the UAv and the configurations of the *** effectiveness of the proposed method is validated via computer simulations.

关键词： Unmanned aerial systems(UASs) Unmanned aerial vehicle(UAv) Communication security Eaves-dropping Reconfigurable intelligent surfaces(RIS) Autonomous navigation and placement Path planning Model predictive control

A Method for Collision Free Sensor Network Based Navigation of Flying Robots among Moving and Steady Obstacles 36

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

A Method for Collision Free Sensor Network Based Navigation ...

第36届中国控制会议

作者： Hang Li andrey v.savkin School of Electrical Engineering and Telecommunications University of New South Wales

ISBN: (纸本)9781538629185

In this paper,we propose a safe navigation algorithm for non-holonomic flying *** detect the static and moving obstacles,a sensor network,which consists of some time-of-flight cameras,is deployed in a three dimensional *** robot or a server obtains the real-time measurements of the environment from the cameras and calculates a temporarily safe robot path from the robot’s current position to the *** temporarily safe path is updated at each time step according to the updated *** computer simulations confirm the expected performance of the proposed algorithm.

关键词： Obstacle Avoidance 3D Navigation Flying Robot Navigation Dynamic Environment Sensor Network Safe Robot Navigation

Wind Power Dispatch based on Wind Forecasting,Electricity Price and Battery Lifetime Estimation 36

在线全文

cnki会议

学校读者我要写书评

暂无评论

Wind Power Dispatch based on Wind Forecasting,Electricity Pr...

第36届中国控制会议

作者： Wenhao Zhuo andrey v.savkin School of Electrical Engineering and Telecommunications The University of New South Wales

ISBN: (纸本)9781538629185

Battery energy storage systems（BESS） are widely used in wind power systems to improve the dispatchability of wind power. In this paper, a wind power trading strategy using controllable BESS is presented to maximize the profit of wind power plants. A dynamic programming algorithm is produced to control the operation of BESS based on forecasted wind power, electricity price and battery lifetime estimation. The aim is to charge/discharge the BESS over different electricity price periods to generate higher income, and the use of battery lifetime estimation in the algorithm is to solve suitable discharge currents and depth of discharges that minimize the battery lifetime consumption, therefore reducing the cost of BESS. The algorithm is flexible and can be implemented to batteries with different specifications. It is tested with commercial battery data available online and real wind energy data from wind farms.

关键词： Wind power control battery energy storage system battery lifetime estimation dynamic programming

A Navigation Algorithm for a Non-holonomic Mobile Robot Navigated by a Sensor Network in Dynamic Cluttered Environments 36

在线全文

cnki会议

学校读者我要写书评

暂无评论

A Navigation Algorithm for a Non-holonomic Mobile Robot Navi...

第36届中国控制会议

作者： Hang Li andrey v.savkin School of Electrical Engineering and Telecommunications University of New South Wales

ISBN: (纸本)9781538629185

In this paper,we propose a discrete-time navigation algorithm for a non-holonomic mobile robot.A sensor network,which consists of some range finders,is deployed in a planar environment to detect static and moving *** robot or a server obtains the real-time local maps from sensor nodes and calculates a temporarily safe path from the robot’s current position to a given *** generated path is updated every time step and the robot tracks it to the target and avoids the obstacles and undetected *** computer simulations confirm the expected performance of the proposed algorithm.

关键词： Obstacle Avoidance Mobile Robots Dynamic Environments Sensor Network Safe Robot Navigation

Mobile Robot Navigation for Emergency Source Seeking Using Sensor Network Topology Maps 36

在线全文

cnki会议

学校读者我要写书评

暂无评论

Mobile Robot Navigation for Emergency Source Seeking Using S...

第36届中国控制会议

作者： Ashanie Gunathillake andrey v.savkin School of Electrical Engineering and Telecommunication University of New South Wales Data61|CSIRO EveleighNSW 2015

ISBN: (纸本)9781538629185

Source seeking in emergency environment is a vital issue,which has attracted the attention of researchers *** this paper,we consider a robot traveling with a constant speed and guided by sensor *** control law does not depend on any gradient dependent *** robot is navigated using an angular velocity limited by a maximum and minimum *** robot location is calculated using the sensor neighborhood topology coordinates,which is an alternative to the physical coordinate *** topology coordinate system,actual physical distances are ***,the proposed control law does not incorporate any distance ***,the performance of the proposed method is evaluated using computer simulation and presented in this paper.

关键词： Gradient Climbing Navigation Source Seeking Topology Maps

Delay-Aware Data Collection in Wireless Sensor Networks with Mobile Nodes 36

在线全文

cnki会议

学校读者我要写书评

暂无评论

Delay-Aware Data Collection in Wireless Sensor Networks with...

第36届中国控制会议

作者： Hailong Huang andrey v.savkin Chao Huang School of Electrical Engineering and Telecommunications University of New South Wales School of Electrical Computer and Telecommunications Engineering University of Wollongong

ISBN: (纸本)9781538629185

The data delivery delay is a significant measure in wireless sensor networks when the users focus on data *** the previous work,two approaches named:Unusual Message Delivery Path Construction（UMDPC） and Improved-UMDPC（IUMDPC）,target on delivering unusual message to mobile nodes within the allowed *** data collection system consists of a set of sensor nodes（S nodes） to detect the environment,a set of mobile nodes（M nodes） attached to buses to collect sensory data,and a set of B nodes deployed at bus stops to assist data *** goal of this work is to investigate the influence of B node coverage on the delay sensitive data delivery performance of the two existing *** this paper,the B node coverage is indicated by the average hop distance between cluster heads and B *** focus on seeking the minimum achieved allowed latency under different B node coverage and demonstrate the results through simulations.

关键词： Wireless sensor networks data collection delay sensitive mobile nodes

On the Problem of Flying Robots Deployment to Improve Cellular User Experience

在线全文

cnki会议

学校读者我要写书评

暂无评论

On the Problem of Flying Robots Deployment to Improve Cellul...

第37届中国控制会议

作者： Hailong Huang andrey v.savkin Ming Ding Mohamed Ali Kaafar Chao Huang School of Electrical Engineering and Telecommunications University of New South Wales

In this paper, we consider the problem of using flying robots to provide internet service to mobile users. Two important aspects are accounted in this context: the robot deployment problem and the relocation problem. Where to deploy the flying robots directly influences the user coverage and the quality of service, and the relocation problem looks for an efficient scheme to relocate the flying robots such that the total moving distance is minimized, with the aim of saving the previous energy resource preloaded on the flying robots. We formulate these two problems and show that the drone deployment problem is a NP-hard problem. Then, we propose a heuristic algorithm to address it. For the relocation problem, we formulate it as the conventional assignment problem and use a liner programming algorithm to solve it. We conduct extensive computer simulations to demonstrate the effectiveness of the proposed approaches.

关键词： Flying robots UAvs autonomous drones quality of service cellular networks content delivery user experience

Merging bound states in the continuum in an open acoustic resonator

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 124-131页

作者： Lujun Huang Bin Jia Artem S.Pilipchuk Sibo Huang Chen Shen Almas F.Sadreev Yong Li andrey E.Miroshnichenko School of Physics and Electronic Sciences East China Normal University Institute of Acoustics Tongji University L.v.Kirensky Institute of Physics Department of Mechanical Engineering Rowan University School of Engineering and Technology University of New South Wales at Canberra

Bound states in the continuum （BICs） are perfectly localized resonances despite embedding in the continuum ***,an isolated BIC is very sensitive to the structure ***,we report merging acoustic BICs in a single open resonator,robust against the structure *** find that both symmetry-protected BIC and Friedrich-Wintgen BIC are sustained in a single coupled waveguide-resonator *** varying the height and length of the resonator,these two BICs move toward each other and merge into a single one at a critical *** to an individual BIC,the merged BIC is robust against fabrication error because its Q-factor is proportional to ΔL-4,whereΔL embodies the structure *** essence of this extraordinary phenomenon is perfectly explained by the two-and three-level approximations of the effective nonHermitian ***,we present direct experimental demonstrations of the moving and merging of BICs in a coupled 3D waveguide-resonator,which are evidenced by the vanishing of the linewidth of Fano resonance in the transmission *** results may find exciting applications in designing high-quality acoustic sources,sensors and filters.

关键词： acoustic resonances bound state in the continuum high-Q resonances

Regenerative medicine of pancreatic islets

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2020年第22期26卷 2948-2966页

作者： Irina v Arutyunyan Timur Kh Fatkhudinov andrey v Makarov andrey v Elchaninov Gennady T Sukhikh National Medical Research Center for Obstetrics Gynecology and Perinatology named after Academician V.I.Kulakov of Ministry of Healthcare of Russian FederationMoscow 117997Russia Research Institute of Human Morphology Moscow 117418Russia Peoples Friendship University of Russia Moscow 117198Russia Pirogov Russian National Research Medical University Ministry of Healthcare of the Russian FederationMoscow 117997Russi

The pancreas became one of the first objects of regenerative medicine,since other possibilities of dealing with the pancreatic endocrine insufficiency were clearly *** number of people living with diabetes mellitus is currently approaching half a billion,hence the crucial relevance of new methods to stimulate regeneration of the insulin-secretingβ-cells of the islets of *** restrictions on the islet regeneration are very tight;nevertheless,the islets are capable of physiological regeneration viaβ-cell self-replication,direct differentiation of multipotent progenitor cells and spontaneousα-toβ-orδ-toβ-cell conversion(trans-differentiation).The existing preclinical models ofβ-cell dysfunction or ablation(induced surgically,chemically or genetically)have significantly expanded our understanding of reparative regeneration of the islets and possible ways of its *** ultimate goal,sufficient level of functional activity ofβ-cells or their substitutes can be achieved by two prospective broad strategies:β-cell replacement andβ-cell ***“regeneration”strategy aims to maintain a preserved population ofβ-cells through in situ exposure to biologically active substances that improveβ-cell survival,replication and insulin secretion,or to evoke the intrinsic adaptive mechanisms triggering the spontaneous non-β-toβ-cell ***“replacement”strategy implies transplantation ofβ-cells(as non-disintegrated pancreatic material or isolated donor islets)orβ-like cells obtained ex vivo from progenitors or mature somatic cells(for example,hepatocytes orα-cells)under the action of small-molecule inducers or by genetic *** believe that the huge volume of experimental and clinical studies will finally allow a safe and effective solution to a seemingly simple goal-restoration of the functionally activeβ-cells,the innermost hope of millions of people globally.

关键词： Pancreas Islets of langerhans β-cells Regeneration Replacement Transplantation Reprogramming