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Novel robust simultaneous localization and mapping for long-term autonomous robots Research Articles

Wei WEI, Xiaorui ZHU, Yi WANG,weirui9003@gmail.com,xiaoruizhu@hit.edu.cn,wangyi601@aliyun.com

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 2, Pages 234-245 doi: 10.1631/FITEE.2000358

Abstract: propose a novel robust visual inertial navigation (VILN) SLAM system, including stereo visual-inertial LiDaRodometry and visual-LiDaR loop closure.The proposed VILN SLAM system can perform well with low drift after experiments, even when the LiDaR

Keywords： Simultaneous localization and mapping (SLAM) Long-term Robustness Light detection and ranging (LiDaR) Visual inertial LiDaR navigation (VILN)

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Embankment dam foundation analysis for the decrease of internal erosion likelihood

Marc SMITH

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4, Pages 431-436 doi: 10.1007/s11709-012-0183-5

Abstract: A zoned embankment dam is founded on clay underlain by a sand deposit. Major seepage phenomena were noticed in the foundation downstream from the dam where the vertical seepage forces in the sand layer were expected to exceed the downward forces due to the overlying clay. Modern technologies were applied to delineate critical zones to help design optimal rehabilitation measures. A global electromagnetic survey was carried out to detect and map the main sources, pathways and exits of seepage. Based on these global findings, a more detailed analysis was then conducted to identify zones where thickness of the foundation clay is minimal, pore pressures in sand are higher and thus where the factor of safety against uplift is lower and internal erosion is more likely to occur. Clay thickness evaluation required the determination of land surface as well as clay-sand contact elevations. A laser airborne survey was performed to model the land surface elevation. Data concerning the clay-sand contact elevation came from the interpreted stratigraphy based on a series of boreholes and cone penetration tests. This data was combined in a geostatistical model along with the measured piezometric levels in the foundation. This resulted in a contour map showing factors of safety against uplift over the entire downstream area. The use of modern technologies, namely electromagnetic and laser surveys as well as geostatistical tools, was instrumental in defining the limits of an otherwise spread-out problem and to provide an optimal solution, in terms of costs and effectiveness, for the long-term stabilization of the foundation.

Keywords： seepage detection geostatistical analysis dam monitoring internal erosion LIDAR survey

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Lignin-derived dual-function red light carbon dots for hypochlorite detection and anti-counterfeiting

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7, Pages 966-975 doi: 10.1007/s11705-022-2244-1

Abstract: Considering this feature, a portable, low-cost, and sensitive fluorescence sensing paper with a low limit of detectionof 0.249 μmol∙L^–1 was fabricated using the SPN-CDs for hypochlorite detection.Furthermore, a new type of visible-light and fluorescence dual-channel information encryption platform

Keywords： alkali lignin red light carbon dots hypochlorite encryption and anti-counterfeiting

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On-Chip LiDAR Technology Advances for Cars, Cell Phones

Mitch Leslie

Engineering 2022, Volume 18, Issue 11, Pages 3-5 doi: 10.1016/j.eng.2022.09.003

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Dual-Comb Ranging Review

Zebin Zhu, Guanhao Wu

Engineering 2018, Volume 4, Issue 6, Pages 772-778 doi: 10.1016/j.eng.2018.10.002

Abstract: Dual-comb ranging is emerging as a powerful tool that exploits phase resolution and frequency accuracyUsing two coherent frequency combs, dual-comb ranging allows time and phase response to be measured rapidlythe responsive bandwidth, ambiguity range, and dynamic measurement characteristics of conventional rangingThis review introduces dual-comb ranging and summarizes the key techniques for realizing this rangingAs optical frequency comb technology progresses, dualcomb ranging shows promise for various professional

Keywords： Ranging Dual-comb interferometer Phase noise Timing jitter Tight-locking Post-correction

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Spatial Discrimination of Complex, Low-Relief Quaternary Siliciclastic Strata Using Airborne Lidar and Article

Jeffrey G. Paine,Edward W. Collins,Lucie Costard

Engineering 2018, Volume 4, Issue 5, Pages 676-684 doi: 10.1016/j.eng.2018.09.005

Abstract: High-resolution airborne lidar surveys, along with surface and borehole geophysical measurements, areHigh-resolution digital elevation models obtained from airborne lidar surveys reveal previously unrecognizedlithologic and stratigraphic distribution in low-relief coastal-plain environments employs ① an initial lidar② selective surface sampling and geophysical measurements based on preliminary mapping derived from lidardata and aerial imagery; and ③ borehole sampling, logging, and analysis at key sites selected after lidar

Keywords： Lithology Geophysics Electromagnetic induction Lidar

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Novel sensing techniques for full-scale testing of civil structures

Kaoshan DAI, Zhenhua HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 240-256 doi: 10.1007/s11709-012-0172-8

Abstract: Performing full-scale structural testing is an important methodology for researchers and engineers in the civil engineering industry. Full scale testing helps the researchers understand civil infrastructures’ loading scenarios, behaviors, and health conditions. It helps the engineers verify, polish, and simplify the structural design and analysis theories. To conduct a full-scale structural testing, sensors are used for data acquisitions. To help structural researchers and engineers get familiar with sensing technologies and select the most effective sensors, this study reviewed and categorized new sensing techniques for full-scale structural testing applications. The researchers of this study categorized sensors used for civil-infrastructure testing into traditional contact sensors and remote sensors based upon their application methodologies, and into cabled sensors and wireless sensors based upon their data communication strategies. The detailed descriptions of wireless sensors and remote sensing techniques and their on-site full-scale applications are presented.

Keywords： sensing technique full-scale testing wireless sensor remote sensing LiDAR laser vibrometer

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Photocatalysis: from solar light to hydrogen energy

Frontiers in Energy 2021, Volume 15, Issue 3, Pages 565-567 doi: 10.1007/s11708-021-0784-6

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Corrigendum to ‘‘Dual-Comb Ranging” [Engineering 4 (2018) 772–778]

Zebin Zhu, Guanhao Wu

Engineering 2019, Volume 5, Issue 2, Pages 350-350 doi: 10.1016/j.eng.2019.01.005

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A novel light fluctuation spectrum method for in-line particle sizing

Shouxuan QIN, Xiaoshu CAI, Li MA

Frontiers in Energy 2012, Volume 6, Issue 1, Pages 89-97 doi: 10.1007/s11708-012-0176-z

Abstract: This paper discusses two problems in in-line particle sizing when using light fluctuation method.First, by retrieving the ratio of particle concentrations at different time, the intensity of incident lightThere exists narrow error between the calculated and pre-detected value of the intensity of incident light

Keywords： in-line measurement particle size distribution (PSD) incident light intensity particle concentration light fluctuation

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Plasmonic light trapping for enhanced light absorption in film-coupled ultrathin metamaterial thermophotovoltaic

Qing NI, Hassan ALSHEHRI, Yue YANG, Hong YE, Liping WANG

Frontiers in Energy 2018, Volume 12, Issue 1, Pages 185-194 doi: 10.1007/s11708-018-0522-x

Abstract: However, the light absorption in ultrathin cells is usually very weak compared to the corresponding bulk

Keywords： metamaterial thermophotovoltaic plasmonics light trapping selective absorption

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HQ in inland saline-alkaline water under different light qualities

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1479-2

Abstract:

• Optimal growth of Chlorella in inland saline-alkaline water was achieved by blue LED.

Keywords： Light quality Chlorella Inland saline-alkaline water Fatty acid Biodiesel property

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Effect of light scattering on the performance of a direct absorption solar collector

Kwang Hyun WON, Bong Jae LEE

Frontiers in Energy 2018, Volume 12, Issue 1, Pages 169-177 doi: 10.1007/s11708-018-0527-5

Abstract: Therefore, for the DASC utilizing a plasmonic nanofluid supporting the LSP, light scattering from metallicIt is found that the light scattering can improve the collector performance if the scattering coefficient

Keywords： direct absorption solar collector plasmonic nanofluid light scattering

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Light olefins synthesis from С

Anton SHALYGIN, Evgenii PAUKSHTIS, Evgenii KOVALYOV, Bair BAL’ZHINIMAEV

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 3, Pages 279-288 doi: 10.1007/s11705-013-1338-1

Abstract: A two-step process was employed to convert methane or ethane to light olefins via the formation of an

Keywords： oxychlorination methane ethane light olefins ruthenium catalyst

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Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8, Pages 1038-1050 doi: 10.1007/s11705-022-2279-3

Abstract: separately composited into the polyelectrolytes complex capsules to enhance thermal conductivity and light-to-thermalMoreover, studies involving light-to-thermal conversion determined that composite phase change materialsexhibited outstanding light-to-thermal conversion performance.

Keywords： cellulose polyelectrolytes phase change materials thermal energy storage light-to-thermal conversion