BtPDR: Bluetooth and PDR-Based Indoor Fusion Localization Using Smartphones

( Yingbiao Yao ),( Qiaojing Bao ),( Qi Han ),( Ruili Yao ),( Xiaorong Xu ),( Junrong Yan ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.8

This paper presents a Bluetooth and pedestrian dead reckoning (PDR)-based indoor fusion localization approach (BtPDR) using smartphones. A Bluetooth and PDR-based indoor fusion localization approach can localize the initial position of a smartphone with the received signal strength (RSS) of Bluetooth. While a smartphone is moving, BtPDR can track its position by fusing the localization results of PDR and Bluetooth RSS. In addition, BtPDR can adaptively modify the parameters of PDR. The contributions of BtPDR include: a Bluetooth RSS-based Probabilistic Voting (BRPV) localization mechanism, a probabilistic voting-based Bluetooth RSS and PDR fusion method, and a heuristic search approach for reducing the complexity of BRPV. The experiment results in a real scene show that the average positioning error is < 2m, which is considered adequate for indoor location-based service applications. Moreover, compared to the traditional PDR method, BtPDR improves the location accuracy by 42.6%, on average. Compared to state-of-the-art Wireless Local Area Network (WLAN) fingerprint + PDR-based fusion indoor localization approaches, BtPDR has better positioning accuracy and does not need the same offline workload as a fingerprint algorithm.

The Research of Business Spatial Feature Analysis Based on GIS Technology : Taking Guangzhou as Example

CHEN Yingbiao,QIAN Qinglan 대한지리학회 2008 대한지리학회 컨퍼런스 자료집 Vol.2 No.-

Simulation Analysis on Seismic Performance of Assembled Composite Energy Dissipation Pipe Joint

Jianpeng Sun,Yingbiao Jiang,Guanjun Lv,Kai Liu,Ju Zhao 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.3

Based on the seismic ductility design concept, a kind of assembled composite energy dissipation pipe joint with rapid repair after the earthquake was proposed. We established the fi nite element models of assembled composite energy dissipation pipe joints with the 24 diff erent structural parameters, and carried out the low reversed cyclic loading simulation test. The strain cloud diagram, hysteretic curve, skeleton curve, stiff ness degradation curve and energy dissipation capacity curve of the pipe joints were obtained. The structural parameters’ infl uence on the performance indexes of the pipe joints was analyzed. The results show that the proposed assembled composite energy dissipation pipe joint has good ductility and energy dissipation capacity. The replacement of peripheral energy dissipation steel plate is simple and fast, and the mechanical properties can be restored after replacement. The diameter thickness ratio of peripheral energy dissipating steel pipe has more signifi cant impact on the seismic performance of the connecting parts. With the increase of the diameter thickness ratio of the peripheral energy dissipating steel pipe, the energy dissipation capacity gradually increases. The ratio of height to thickness has less eff ect on the seismic performance of the model, and the initial stiff ness and energy dissipation capacity of the model are signifi cantly enhanced after the stiff ened steel pipe is installed outside.

The Bovine Iris Location Method Based on Dynamic Contour Tracking and Least Square Principle

Zhongliang Luo,Yingbiao Jia 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.7

Bovine iris recognition technology plays a very important role in meat food traceability system about large-scale livestock individual identification. In order to improve the precision and speed of bovine iris location, iris inner and outer edge location method based on dynamic contour tracking and least square principle ellipse fitting were respectively proposed in the paper, according to the characteristics of bovine iris image. For iris inner edge location, firstly, the pupil centroid was determined, and pupil sub-image was separated from eye image, then, using dynamic contour tracking method based on the non-initialized level set model to track the boundary of pupil, and got iris inner boundary. For iris outer edge location, noise reducing template was determined by pupil sub-image, which combined with mathematical morphology operators to further suppress random noise, so, ideal outer edge detection curve was obtained. Finally, it got iris outer edge of ellipse fitting based on least squares principle. Experimental results shown that this method was less running time, high location accuracy, it has a certain practicality in large-scale livestock meat food traceability.

Bridge Dynamic Deflection and Damage Analysis Based on Transfer Matrix of Multibody System

Jianpeng Sun,Yingbiao Jiang 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.3

To realize the bridge state assessment and damage diagnosis, the vibration transfer matrix of the vehicle-bridge coupling system is established based on the discrete-time transfer matrix method of the multibody system, and the correctness of the derived transfer matrix is verified. The coupling vibration of vehicle passing through the bridge is analyzed. The deflection of each point of the bridge propagates forward in the form of fluctuation when the vehicle passes the bridge uniformly. The dynamic deflection of bridge decreases exponentially with the increase of vehicle speed. The dynamic deflection has the certain sensitivity to the injured unit, which can reflect the injured unit. The curvature difference of uniform load surface is calculated to carry out the damage location analysis of the bridge, and the obtained results can determine the specific location of the damage. With the increase of damage degree, the value of the same unit increases, and the diagnosis of damage location and degree is presented in the form of a peak.

Energy-efficient Buffer-aided Optimal Relay Selection Scheme with Power Adaptation and Inter-relay Interference Cancellation

( Xiaorong Xu ),( Liang Li ),( Yingbiao Yao ),( Xianyang Jiang ),( Sanqing Hu ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.11

Considering the tradeoff between energy consumption and outage behavior in buffer-aided relay selection, a novel energy-efficient buffer-aided optimal relay selection scheme with power adaptation and Inter-Relay Interference (IRI) cancellation is proposed. In the proposed scheme, energy consumption minimization is the objective with the consideration of relay buffer state, outage probability and relay power control, in order to eliminate IRI. The proposed scheme selects a pair of optimal relays from multiple candidate relays, denoted as optimal receive relay and optimal transmit relay respectively. Source-relay and relay-destination communications can be performed within a time-slot, which performs as Full-Duplex (FD) relaying. Markov chain model is applied to analyze the evolution of relay buffer states. System steady state outage probability and achievable diversity order are derived respectively. In addition, packet transmission delay and power reduction performance are investigated with a specific analysis. Numerical results show that the proposed scheme outperforms other relay selection schemes in terms of outage behavior with power adaptation and IRI cancellation in the same relay number and buffer size scenario. Compared with Buffer State relay selection method, the proposed scheme reduces transmission delay significantly with the same amount of relays. Average transmit power reduction can be implemented to relays with the increasing of relay number and buffer size, which realizes the tradeoff between energy-efficiency, outage behavior and delay performance in green cooperative communications.

Joint Beamforming and Power Splitting Design for Physical Layer Security in Cognitive SWIPT Decode-and-Forward Relay Networks

( Xiaorong Xu ),( Andi Hu ),( Yingbiao Yao ),( Wei Feng ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.1

In an underlay cognitive simultaneous wireless information and power transfer (SWIPT) network, communication from secondary user (SU) to secondary destination (SD) is accomplished with decode-and-forward (DF) relays. Multiple energy-constrained relays are assumed to harvest energy from SU via power splitting (PS) protocol and complete SU secure information transmission with beamforming. Hence, physical layer security (PLS) is investigated in cognitive SWIPT network. In order to interfere with eavesdropper and improve relay’s energy efficiency, a destination-assisted jamming scheme is proposed. Namely, SD transmits artificial noise (AN) to interfere with eavesdropping, while jamming signal can also provide harvested energy to relays. Beamforming vector and power splitting ratio are jointly optimized with the objective of SU secrecy capacity maximization. We solve this non-convex optimization problem via a general two-stage procedure. Firstly, we obtain the optimal beamforming vector through semi-definite relaxation (SDR) method with a fixed power splitting ratio. Secondly, the best power splitting ratio can be obtained by one-dimensional search. We provide simulation results to verify the proposed solution. Simulation results show that the scheme achieves the maximum SD secrecy rate with appropriate selection of power splitting ratio, and the proposed scheme guarantees security in cognitive SWIPT networks.

Optimization Algorithm for Spectrum Sensing Delay Time in Cognitive Radio Networks Using Decoding Forward Relay

( Kaili Xia ),( Xianyang Jiang ),( Yingbiao Yao ),( Xianghong Tang ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.3

Using decode-and-forward relaying in the cognitive radio networks, the spectrum efficiency can improve furthermore. The optimization algorithm of the spectrum sensing estimation time is presented for the cognitive relay networks in this paper. The longer sensing time will bring two aspects of the consequences. On the one hand, the channel parameters are estimated more accurate so as to reduce the interferences to the authorized users and to improve the throughput of the cognitive users. On the other hand, it shortens the transmission time so as to decease the system throughput. In this time, it exists an optimal sensing time to maximize the throughput. The channel state information of the sub-bands is considered as the exponentially distributed, so a stochastic programming method is proposed to optimize the sensing time for the cognitive relay networks. The computer simulation results using the Matlab software show that the algorithm is effective, which has a certain engineering application value.

Key Construction Technology and Monitoring of Long-Span Steel Box Tied Arch Bridge

Jianpeng Sun,Jinbin Li,Yingbiao Jiang,Xiaogang Ma,Zihan Tan,Gaolin Zhufu 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.1

As a composite system bridge, half-through steel box tied arch bridge combines the arch mainly bearing pressure and the beam mainly bearing bending moment, gives full play to their respective advantages, and has the two characteristics of large span capacity of arch bridge and strong adaptability of simply supported beam bridge to foundation. However, in the construction process, due to the complex construction technology and structural stress behavior, the hoisting of arch rib, the tensioning of tie rod and suspender are accompanied by the change of internal load, which is a challenge for bridge construction. Taking the Lancang River Liming Bridge in Xishuangbanna, Yunnan Province as an example, this paper introduces a new construction scheme of arch bridge, introduces the structural characteristics of cable hoisting system, and puts forward the construction monitoring method. The response of arch rib, suspender, tie rod and main beam is monitored by health monitoring system and compared with the analysis results of finite element model to ensure that the stress and deformation of the structure under various working conditions are in a reasonable state. The results show that the proposed construction scheme can meet the safety and quality requirements of bridge construction, and the finite element model can reasonably predict the bridge behavior in construction. This study is expected to promote the construction of long-span half through steel box tied arch bridge.

SME ,Technological Innovation and Regional Environment : The Case of Guangdong, China

QIAN Qinglan,CHEN Yingbiao,DONG Xiaomin 대한지리학회 2008 대한지리학회 컨퍼런스 자료집 Vol.2 No.-