Study of Concurrency Message Bus based on Adaptive Communication Environment Framework

Feng Ruan,Tao Li,Zhiyong Fan,Jin Wang 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.6

Message middleware is an important branch of middleware, it provides the development of distributed application system with an asynchronous, pine for programming architecture, the consistent thought and the development trend of modern software technology, which is widely used in industry in the enterprise application integration and distributed computing. Message bus message middleware is a kind of simple implementation, but with its unique advantages for a wide variety of distributed applications development injected with strong power, greatly promote the development of application system integration. This paper is mainly focusing on the key issues involved in the middleware, message bus, and concurrency model for further research.

A Multi-hop Uneven Hierarchical Routing Protocol for Wireless Sensor Networks Using a Controlled Mobile Sink

Feng Ruan,Chuanyang Yin,Jinhui Chen,Ning Ma,Shengjun Xue 보안공학연구지원센터(IJGDC) 2013 International Journal of Grid and Distributed Comp Vol.6 No.2

A Distance Clustering Routing Algorithm Considering Energy for Wireless Sensor Networks

Feng Ruan,Chuanyang Yin,Jinhui Chen,Jin Wang,Shengjun Xue 보안공학연구지원센터 2013 International Journal of Future Generation Communi Vol.6 No.5

Energy Efficient Strategies with Mobile Sink for WSNs : A Survey

Feng Ruan,Zhiyong Fan,Yiguang Gong,Jianmin Hou,Ping Mei,Tao Li 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.8

Sink mobility has been widely used to reduce the energy consumption of sensor nodes, which can prolong the lifetime of nodes in wireless sensor networks (WSNs). Researchers found that sink mobility can improve the stability, throughput and lifetime of the very large-scale WSNs. However, sink mobility also causes issues such as data latency and communication overhead. With these properties sink mobility remains more research efforts under different requirements. In this paper we present a survey of energy efficient strategies in WSNs with mobile sink. Firstly, we investigate the existing issues in WSNs. Then we focus on the problem of energy efficient data gathering strategy with mobile sink and present some existing solutions. Finally, we conclude this paper with some potential extensions which need to be further explored.

Resource Allocation and Distributed Uplink Offloading Mechanism in Fog Environment

Ruan, Linna,Liu, Zhoubin,Qiu, Xuesong,Wang, Zixiang,Guo, Shaoyong,Qi, Feng The Korean Institute of Communications and Informa 2018 Journal of communications and networks Vol.20 No.3

Applying fog computing technology to the shared pattern has two problems to cope with. One is to formulate a rational mechanism for resource allocation, and the other is to design computation offloading strategy of tasks based on resource allocation result. For solving these problems, we construct a three-layer F-RAN architecture first, which consists of terminal layer, access layer and network layer. Second, we adopt differential game and bipartite graph multiple matching algorithm to solve bandwidth resource allocation problem of fog node (FN)-access point (AP) and AP-shared terminal (ST), respectively. Third, Lyapunov theory and proposed deviation update decision algorithm (DUDA) are used to solve computation offloading decision-making and offloading update order-making. At last, simulation results show that our strategy can save 30%-60% system consumption, and the resource demand satisfaction rate can be guaranteed to reach 80% or more.

Tearing of metallic sandwich panels subjected to air shock loading

Feng Zhu,Dong Ruan,Dongwei Shu,Guoxing Lu 국제구조공학회 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.32 No.2

This paper presents a computational study for the structural response of blast loaded metallic sandwich panels, with the emphasis placed on their failure behaviours. The fully-clamped panels are square, and the honeycomb core and skins are made of the same aluminium alloy. A material model considering strain and strain rate hardening effects is used and the blast load is idealised as either a uniform or localised pressure over a short duration. The deformation/failure procedure and modes of the sandwich panels are identified and analysed. In the uniform loading condition, the effect of core density and face-sheets thicknesses is analysed. Likewise, the influence of pulse shape on the failure modes is investigated by deriving a pressure-impulse (P-I) diagram. For localised loading, a comparative study is carried out to assess the blast resistant behaviours of three types of structures: sandwich panel with honeycomb core, two face-sheets with air core and monolithic plate, in terms of their permanent deflections and damage degrees. The finding of this research provides a valuable insight into the engineering design of sandwich constructions against air blast loads.

Resource Allocation and Distributed Uplink Offloading Mechanism in Fog Environment

Linna Ruan,Zhoubin Liu,Xuesong Qiu,Zixiang Wang,Shaoyong Guo,Feng Qi 한국통신학회 2018 Journal of communications and networks Vol.20 No.3

Applying fog computing technology to the shared patternhas two problems to cope with. One is to formulate a rational mechanismfor resource allocation, and the other is to design computationoffloading strategy of tasks based on resource allocation result. For solving these problems, we construct a three-layer F-RAN architecturefirst, which consists of terminal layer, access layer andnetwork layer. Second, we adopt differential game and bipartitegraph multiple matching algorithm to solve bandwidth resource allocationproblemof fog node (FN)-access point (AP) and AP-sharedterminal (ST), respectively. Third, Lyapunov theory and proposeddeviation update decision algorithm (DUDA) are used to solve computationoffloading decision-making and offloading update ordermaking. At last, simulation results show that our strategy can save30%-60% system consumption, and the resource demand satisfactionrate can be guaranteed to reach 80% or more.

Tearing of metallic sandwich panels subjected to air shock loading

Zhu, Feng,Lu, Guoxing,Ruan, Dong,Shu, Dong-Wei Techno-Press 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.32 No.2

This paper presents a computational study for the structural response of blast loaded metallic sandwich panels, with the emphasis placed on their failure behaviours. The fully-clamped panels are square, and the honeycomb core and skins are made of the same aluminium alloy. A material model considering strain and strain rate hardening effects is used and the blast load is idealised as either a uniform or localised pressure over a short duration. The deformation/failure procedure and modes of the sandwich panels are identified and analysed. In the uniform loading condition, the effect of core density and face-sheets thicknesses is analysed. Likewise, the influence of pulse shape on the failure modes is investigated by deriving a pressure-impulse (P-I) diagram. For localised loading, a comparative study is carried out to assess the blast resistant behaviours of three types of structures: sandwich panel with honeycomb core, two face-sheets with air core and monolithic plate, in terms of their permanent deflections and damage degrees. The finding of this research provides a valuable insight into the engineering design of sandwich constructions against air blast loads.

Application of O-RADS US combined with MV-Flow to diagnose ovarian-adnexal tumors

Linlin Ruan,Hui Liu,Hong Xiang,Yongkang Ni,Yuling Feng,Huili Zhou,Mengtong Qi 대한초음파의학회 2024 ULTRASONOGRAPHY Vol.43 No.1

Purpose: This study aimed to explore the application of Ovarian-Adnexal Reporting and Data System Ultrasound (O-RADS US) combined with MV-Flow (Samsung Medison Co., Ltd.) to diagnose ovarian-adnexal masses.Methods: A total of 112 ovarian-adnexal masses (81 benign and 31 malignant) from 105 consecutive patients were analyzed. The O-RADS US and vascular index from MV-Flow (VI^MV) were measured and compared with the reference standard. O-RADS US and MV-Flow were tested for consistency.Results: Receiver operating characteristic curves were drawn for O-RADS US, MV-Flow, and their combination. The combined methods had the largest area under the curve (0.955), followed by O-RADS US (0.929) and MV-Flow (0.923). A mass was considered malignant when the O-RADS US classification was 5 and VI^MV was ≥7.15. With this definition, MV-Flow had the highest sensitivity (87.10%), with consistent findings for the combined diagnostic methods and O-RADS US (83.87%). The specificity of the combined diagnostic methods (93.83%) was higher than that of MV-Flow (91.36%). O-RADS US had the lowest specificity (90.12%). The combined diagnostic methods had the highest coincidence rate (91.07%), and MV-Flow (90.18%) had a significantly higher coincidence rate than O-RADS US (88.39%). Both O-RADS US and MV-Flow showed good consistency among different physicians (former kappa, 0.974; latter intraclass correlation coefficient [ICC], 0.986). MV-Flow had a high consistency for the same physician (ICC, 1).Conclusion: O-RADS US and MV-Flow exhibited good diagnostic efficacy, and their combined diagnostic efficacy was higher than that of each individually. O-RADS US and MV-Flow can improve the diagnosis of benign and malignant ovarian-adnexal masses. Purpose: This study aimed to explore the application of Ovarian-Adnexal Reporting and Data System Ultrasound (O-RADS US) combined with MV-Flow (Samsung Medison Co., Ltd.) to diagnose ovarian-adnexal masses. Methods: A total of 112 ovarian-adnexal masses (81 benign and 31 malignant) from 105 consecutive patients were analyzed. The O-RADS US and vascular index from MV-Flow (VIMV) were measured and compared with the reference standard. O-RADS US and MV-Flow were tested for consistency. Results: Receiver operating characteristic curves were drawn for O-RADS US, MV-Flow, and their combination. The combined methods had the largest area under the curve (0.955), followed by O-RADS US (0.929) and MV-Flow (0.923). A mass was considered malignant when the O-RADS US classification was 5 and VIMV was ≥7.15. With this definition, MV-Flow had the highest sensitivity (87.10%), with consistent findings for the combined diagnostic methods and O-RADS US (83.87%). The specificity of the combined diagnostic methods (93.83%) was higher than that of MV-Flow (91.36%). O-RADS US had the lowest specificity (90.12%). The combined diagnostic methods had the highest coincidence rate (91.07%), and MV-Flow (90.18%) had a significantly higher coincidence rate than O-RADS US (88.39%). Both O-RADS US and MV-Flow showed good consistency among different physicians (former kappa, 0.974; latter intraclass correlation coefficient [ICC], 0.986). MV-Flow had a high consistency for the same physician (ICC, 1). Conclusion: O-RADS US and MV-Flow exhibited good diagnostic efficacy, and their combined diagnostic efficacy was higher than that of each individually. O-RADS US and MV-Flow can improve the diagnosis of benign and malignant ovarian-adnexal masses.

Impact of Large-scale Wind Power Integration on the UFLS Scheme

Xue, Feng,Li, Yue,Song, Xiao-Fang,Mo, Ruan-Qing The Korean Institute of Electrical Engineers 2014 The Journal of International Council on Electrical Vol.4 No.3

This paper analyzes some major factors for the impact of wind power integration on power system dynamic frequency characteristics in theory. Combining with an actual grid, test scenarios with various scales of doubly fed induction generator (DFIG)-based wind power integration are formulated. Through simulation in the scenarios with FASTEST software, the impacts on the action of under frequency load shedding (UFLS) scheme are displayed in two aspects, the rate of change of frequency (ROCOF) and wind turbine generator own protection. Simulation result shows that the ROCOF will not affect the lock action of UFLS devices in the test system of this paper. Wind turbine generator protection may worsen frequency responses, so it is proposed to be in harmony with the design of UFLS scheme.