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Detecting large-scale underwater cracks based on remote operated vehicle and graph convolutional neural

Wenxuan CAO; Junjie LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 11, Pages 1378-1396 doi: 10.1007/s11709-022-0855-8

Abstract: It is of great significance to quickly detect underwater cracks as they can seriously threaten the safety of underwater structures. Research to date has mainly focused on the detection of above-water-level cracks and hasn’t considered the large scale cracks. In this paper, a large-scale underwater crack examination method is proposed based on image stitching and segmentation. In addition, a purpose of this paper is to design a new convolution method to segment underwater images. An improved As-Projective-As-Possible (APAP) algorithm was designed to extract and stitch keyframes from videos. The graph convolutional neural network (GCN) was used to segment the stitched image. The GCN’s m-IOU is 24.02% higher than Fully convolutional networks (FCN), proving that GCN has great potential of application in image segmentation and underwater image processing. The result shows that the improved APAP algorithm and GCN can adapt to complex underwater environments and perform well in different study areas.

Keywords： underwater cracks remote operated vehicle image stitching image segmentation graph convolutional

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Development and deep-sea exploration of the Haidou-1

Frontiers of Engineering Management Pages 546-549 doi: 10.1007/s42524-023-0260-6

Abstract: Development and deep-sea exploration of the Haidou-1

Keywords： hadal zone autonomous and remotely-operated vehicle integrated exploration operation deep dive exceeding

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Structural synthesis of ancient Chinese foot-operated silk-reeling mechanism

Kuohung HSIAO, Yuhsun CHEN, Hongsen YAN,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 279-288 doi: 10.1007/s11465-010-0101-2

Abstract: This work synthesizes the structures of the foot-operated silk-reeling mechanism, which was vaguely depicted

Keywords： silk-reeling mechanism structure of mechanism reconstruction design history of machinery

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Combustion analysis of a hydrogen-diesel fuel operated DI diesel engine with exhaust gas recirculation

M. LOGANATHAN, A. VELMURUGAN, TOM PAGE, E. JAMES GUNASEKARAN, P. TAMILARASAN

Frontiers in Energy 2017, Volume 11, Issue 4, Pages 568-574 doi: 10.1007/s11708-017-0461-y

Abstract: The rapid depletion of fossil fuel and growing demand necessitates researchers to find alternative fuels which are clean and sustainable. The need for finding renewable, low cost and environmentally friendly fuel resources can never be understated. An efficient method of generation and storage of hydrogen will enable automotive manufacturers to introduce hydrogen fuelled engine in the market. In this paper, a conventional DI diesel engine was modified to operate as gas engine. The intake manifold of the engine was supplied with hydrogen along with recirculated exhaust gas and air. The injection rates of hydrogen were maintained at three levels with 2 L/min, 4 L/min, 6 L/min and 8 L/min and 10 L/min with an injection pressure of 2 bar. Many of the combustion parameters like heat release rate (HRR), ignition delay, combustion duration, rate of pressure rise (ROPR), cumulative heat release rate (CHR), and cyclic pressure fluctuations were measured. The HRR peak pressure decreased with the increase in EGR rate, while combustion duration increased with the EGR rate. The cyclic pressure variation also increased with the increase in EGR rate.

Keywords： hydrogen exhaust gas recirculation (EGR) diesel combustion heat release rate (HRR) combustion duration

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Interactions between remote ischemic conditioning and post-stroke sleep regulation

Frontiers of Medicine 2021, Volume 15, Issue 6, Pages 867-876 doi: 10.1007/s11684-021-0887-9

Abstract: As a multi-targeted nonpharmacological intervention, remote ischemic conditioning can reduce the ischemicOn the basis of the common mechanisms of remote ischemic conditioning and sleep regulation, a causalrelationship was proposed between remote ischemic conditioning and post-stroke sleep quality.

Keywords： remote ischemic conditioning sleep regulation stroke

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Reactive power deployment and cost benefit analysis in DNO operated distribution electricity markets

Atma Ram GUPTA,Ashwani KUMAR

Frontiers in Energy 2019, Volume 13, Issue 1, Pages 86-98 doi: 10.1007/s11708-017-0456-8

Abstract: The aim of this paper is to analyze unbalanced radial distribution systems (UBRDS) with the distribution static compensator (D-STATCOM). The main objectives of this paper are D-STATCOM allocation in UBRDS with an objective of providing reactive power support to enhance voltage profile and reduce line losses of the distribution network, determination of optimal D-STATCOM rating subjected to minimization of total cost, and impact of D-STATCOM placement on improving power factor and savings in cost of energy loss. The analysis is conducted on a large industrial load model with light, medium and high loading scenarios. Further, the impact of load growth is also considered for better planning of the power distribution system. The results are obtained on standard 25-bus UBRDS to check the feasibility of the proposed methodology.

Keywords： unbalanced distribution system D-STATCOM voltage sensitivity index load models load growth distribution network operator (DNO)

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Design and realization of a remote monitoring and diagnosis and prediction system for large rotating

Shaohong WANG, Tao CHEN, Jianghong SUN

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2, Pages 165-170 doi: 10.1007/s11465-009-0090-1

Abstract: Remote monitoring and diagnosis technology is a new fault diagnosis mode combining computer technologyThe designed remote monitoring and diagnosis and prediction system for large rotating machinery integrates

Keywords： large rotating machinery remote monitoring fault diagnosis prediction system

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Integration and sharing of remote sensing data in China

Zhou Chenghu,Ou Yang,Li Zengyuan

Strategic Study of CAE 2008, Volume 10, Issue 6, Pages 51-55

Abstract:

With in-orbit operation satellites increasing and remote sensing datamultiplying, integration and sharing of remote sensing data become the trend of the times.On the basis of the analysis and evaluation of existing remote sensing data resources and the integration

Keywords： remote sensing data integration sharing

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The Development of Marine Optical Remote Sensing and the Frontiers

Pan Delu,Li Yan

Strategic Study of CAE 2003, Volume 5, Issue 3, Pages 39-43

Abstract:

The space remote sensing and information technique have become a necessary tool to observe the differentThe marine remote sensing has more advantage than the normal investigation in the collection of marineThis paper, first, reviews the development of marine optical remote sensing in China over the last 20Finally, the key technique and frontiers of the application of marine optical remote sensing in the monitoring

Keywords： marine optics remote sensing technique development and frontiers

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Process stability and microbial community composition in pig manure and food waste anaerobic co-digesters operated

Conor Dennehy, Peadar G. Lawlor, Gillian E. Gardiner, Yan Jiang, Paul Cormican, Matthew S. McCabe, Xinmin Zhan

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 3, doi: 10.1007/s11783-017-0923-9

Abstract: Continuously stirred tank reactors of 3.75 L working volume were operated in triplicate at 42°C.

Keywords： Biogas Sequencing Clocamonaceae Spiorchatetes Isobutyrate Biosafety

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Image analyses for video-based remote structure vibration monitoring system

Yang YANG,Xiong (Bill) YU

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1, Pages 12-21 doi: 10.1007/s11709-016-0313-6

Abstract: Video-based vibration measurement is a cost-effective way for remote monitoring the health conditionsThe technical basis of video-based remote vibration measurement system is digital image analysis.With further refinement of system hardware and image processing software, it will be developed into a remote

Keywords： structure health monitoring velocity estimation frame difference PIV optical-flow method

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Water quality monitoring in a slightly-polluted inland water body through remote sensing - Case study

HE Weiqi, LIU Xuehua, CHEN Jining, CHEN Shan

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2, Pages 163-171 doi: 10.1007/s11783-008-0027-7

Abstract: Through a remote sensing (RS) approach and using Landsat 5 Thematic Mapper (TM) data, water quality retrievalshow that there exists a statistically significant correlation between each water quality variable and remote

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Orienting the Forest Remote Sensing of the 21st Century in China

Zhao Xianwen

Strategic Study of CAE 1999, Volume 1, Issue 3, Pages 16-21

Abstract: assessment and monitoring of the forest ecological environment and the forest disaster by means of remote

In the light of the mentioned above, the forest remote sensing perspective of the 21 st centuryThe author putted forward to the main developing directions on forest remote sensing of the next centuryp>

2 To study the macroscopic conditions and functions through utilizing the superiority of the remoteemergence of the high-resolution satellite data and the development of high spectrum technology, the remote

Keywords： forestry remote sensing developing of sustainable forestry forestry towards the 21 st century

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Long March 3 Series Launch Vehicle

Long Lehao

Strategic Study of CAE 1999, Volume 1, Issue 1, Pages 11-18

Abstract:

The background, design approach, system engineering, launch results and technical & development characteristics of LM - 3 series launch vehicles are presented, and the development of launch vehicles in the future is prospected. It is indicated that with advanced performance, these launch vehicles are the main force of commercial heavy lift in China.

Keywords： aerospace heavy lift launch vehicle launch services LM - 3 series launch vehicle

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Monitor of Water Transparency in the China Sea by Using Satellite Remote Sensing

He Xianqiang,Pang Delu,Huang Erhui,Zhao Yanling

Strategic Study of CAE 2004, Volume 6, Issue 9, Pages 33-37

Abstract: It must combine the remote sensing method to fulfill the stereo monitor.water transparency as the breakthrough, and studys the water transparency monitoring by using satellite remoteThe result shows that the inverse relative error is 22.6% by using remote sensing, and it is even better

Keywords： the China sea water transparency remote sensing monitor