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Prospecting for coal in China with remote sensing

Journal of China University of Mining and Technology 2008年第4期18卷 537-545,550页

作者： TAN Ke-long WAN Yu-qing SUN Sun-xin BAO Gui-bao KUANG Jing-shui Aerophotogrammetry and Remote sensing center of China Coal Xi＇ an Shaanxi 710054 China Remote sensing research center Shanghai University Shanghai 200072 China

With the rapid development of China＇s economy, coal resources are increasingly in great demand. As a result, the remaining coal reserves diminish gradually with large-scale exploitation of coal resources. Easily-found mines which used to be identified from outcrops or were buried under shallow overburden are decreasing, especially in the prosperous eastern regions of China, which experience coal shortages. Currently the main targets of coal prospecting are concealed and unidentified underground coal bodies, making it more and more difficult for coal prospecting. It is therefore important to explore coal prospecting by taking advantage of modern remote sensing and geographic information system technologies. Given a theoretical basis for coal prospecting by remote sensing, we demonstrate the methodologies and existing problems systematically by summarizing past practices of coal prospecting with remote sensing. We propose a new theory of coal prospecting with remote sensing. In uncovered areas, coal resources can be prospected for by direct interpretation. In coal beating strata of developed areas covered by thin Quaternary strata or vegetation, prospecting for coal can be carried out by indirect interpretation of geomorphology and vegetation. For deeply buried underground deposits, coal prospecting can rely on tectonic structures, interpretation and analysis of new tectonic clues and regularity of coal formation and preservation controlled by tectonic structures. By applying newly hyper-spectral, multi-polarization, multi-angle, multi-temporal and multi-resolution remote sensing data and carrying out integrated analysis of geographic attributes, ground attributes, geophysical exploration results, geochemical exploration results, geological drilling results and remote sensing data by GIS tools, coal geology resources and mineralogical regularities can be explored and coal resource information can be acquired with some confidence.

关键词： remote sensing coal prospecting coal field prediction coal prospecting for deeply buried coal seams

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Birefringence Effect of Long-period Fiber Gratings Fabricated by SMF

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Journal of Wuhan University of Technology(Materials Science) 2006年第2期21卷 69-71页

作者：王昌 Fiber sensing Technology & research center Wuhan University of TechnologyWuhan 430070 China

The fabrication of LPFG in single mode fiber （SMF） was fabricated using amplitude mask writing techniques. The birefringence effect of LPFG for sensing the transverse strain was discussed in detail. The experimented results shou that it exhibits a very high sensitivity and a good linearity to transverse strain, with a sensitivity some hundred times greater than what has been achieved using FBG sensor.

关键词： LPFG birefringence effec SMF

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A novel wide measuring range FBG displacement sensor with variable measurement precision based on helical bevel gear

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Optoelectronics Letters 2015年第2期11卷 81-83页

作者：蒋善超王静隋青美曹玉强 Optical Fiber sensing Technology and Engineering research center Shandong University

A novel fiber Bragg grating(FBG)displacement sensor is proposed,which can achieve wide measuring range displacement detection with variable measurement precision due to its mechanical transfer structure of helical bevel gear.A prototype is designed and *** maximum detection displacement of this prototype is 1.751 m,and the precision grade changes from 0.2%to 6.7%.Through analyzing the experiment data which is obtained in the calibration experiment,the measuring range of this sensor is from 0 m to 1.532 m,and the wavelength shift errors between experiment data and theory calculation are all less than 5%.

关键词： Bevel gears Fiber Bragg gratings

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A new member of the structured light family:optical spatiotemporal vortices

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Light(Science & Applications) 2023年第10期12卷 2003-2005页

作者： Fu Feng Xiaocong Yuan research center for Humanoid sensing Zhejiang LabHangzhou 311100China Nanophotonics research Centre Shenzhen UniversityShenzhen 518060China

The burgeoning growth of structured light has opened up new possibilities for harnessing the spatiotemporal coupling effects in *** spatiotemporal vortices,as a subset of spatiotemporal light,have emerged as a focal point of recent research,owing to their distinctive characteristics and vast range for *** unique structured light will endow photons with a new degree of freedom,promising to revolutionize researchers’understanding of *** thorough research on optical spatiotemporal vortices will establish a solid foundation for the development of innovative physical mechanisms and advanced applications in photonics.

关键词： light subset optical

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Airport automatic detection in large space-borne SAR imagery

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Journal of systems Engineering and Electronics 2010年第3期21卷 390-396页

作者： Shaoming Zhang Yi Lin Xiaohu Zhang Yingying Chen research center of Remote sensing and Spatial Informatics Technology Tongji University Shanghai 200092 R R. China

A method to detect airports in large space-borne synthetic aperture radar（SAR） imagery is ***,the large SAR imagery is segmented according to amplitude characteristics using maximum a posteriori（MAP） estimator based on the heavytailed Rayleigh *** attention is then paid on the object of interest（OOI） extracted from the large *** minimumarea enclosing rectangle（MER） of OOI is created via a rotating calipers *** projection histogram（PH） of MER for OOI is then computed and the scale and rotation invariant feature for OOI are extracted from the statistical characteristics of PH.A support vector machine（SVM） classifier is trained using those feature parameters and the airport is detected by the SVM classifier and Hough *** application in space-borne SAR images demonstrates the effectiveness of the proposed method.

关键词： synthetic aperture radar(SAR) imagery airport detection image segmentation minimum-area enclosing rectangle support vector machine(SVM).

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Review on Hollow-Core Fiber Based Multi-Gas sensing Using Raman Spectroscopy

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Photonic Sensors 2024年第4期14卷 1-19页

作者： Qilu NIE Zhixiong LIU Mengen CHENG Shilong PEI Dexun YANG Donglai GUO Minghong YANG National Engineering research center of Fiber Optic sensing Technology and Networks Wuhan University of TechnologyWuhan 430070China

In recent years,detecting and quantifying multiple gases have garnered widespread attention across various fields,particularly in volatile organic compound(VOC)detection,which holds significant importance for ecosystems and the medical *** Raman spectroscopy has been widely used in multi-gas detection due to its advantages in fast response speed and non-destructive *** paper reviews the latest research progress of the multi-gas sensing technology in the Raman spectroscopy,focusing on using the hollow-core fiber to enhance the gas signal *** basic principles of the fiber-enhanced Raman spectroscopy are *** detailed discussion includes the system architecture,parameter configuration,and experimental ***,the latest advances in the coherent anti-Stokes Raman scattering multi-gas detection technology are ***,the challenges faced by the hollow-core fiber in practical applications are discussed.

关键词： Raman spectroscopy hollow-core fiber fiber-enhanced Raman spectroscopy coherent anti-Stokes Raman scattering gas detection

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research progress in metal-organic frameworks and their derivatives in electrochemistry

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Science China Chemistry 2025年

作者： Lingling Chen Yuxin Liu Yichun Su Wenchen Zhu Guangyu Du Huan Pang School of Chemistry and Chemical Engineering Yangzhou University Department of Applied Physics The Hong Kong Polytechnic University Interdisciplinary Materials research center Institute for Advanced Study Chengdu University State Key Laboratory of Coordination Chemistry Nanjing University

Metal-organic frameworks (MOFs) are distinguished by their unique porosity and meticulously ordered framework structures,setting them apart from conventional complexes. These materials are defined by their highly organized crystalline and pore structures, extensive surface areas, robust porosity, and superior adsorption capabilities. Owing to their exceptional structural and functional attributes, MOFs and their derivatives are leveraged across a broad spectrum of applications, demonstrating significant potential across diverse sectors. In recent times, the scientific community has increasingly focused on MOFs, underscoring their growing importance in research. Despite the promising array of applications for MOFs and their derivatives,challenges persist in practical deployments, and the pathway to research advancement remains daunting. This document delves into the synthesis and various applications of MOFs and their derivatives, particularly in the domains of energy storage, catalysis,sensing, and water treatment. It also highlights the ongoing research progress in the field of electrochemistry, including developments in lithium ion batteries (LIBs), lithium-sulfur batteries (LSBs), zinc-ion batteries (ZIBs), aqueous nickel-zinc batteries (NZBs), and supercapacitors. Finally, it provides an outlook on the future prospects and potential hurdles facing the development of MOF materials.

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Near-infrared light-driven yolk@shell carbon@silica nanomotors for fuel-free triglyceride degradation

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Nano research 2021年第3期14卷 654-659页

作者： Yi Xing Songsong Tang Xin Du Tailin Xu Xueji Zhang research center for Bioengineering and sensing Technology Beijing Key Laboratory for Bioengineering and Sensing TechnologyDepartment of Chemistry&Biological EngineeringUniversity of Science&Technology BeijingBeijing100083China

Yolk@shell mesoporous nanoparticles have received close attention due to their controllable structures and integrated ***,most yolk@shell nanosystems lack ***,yolk@spiky-shell structured carbon@silica nanomotors are fabricated with near-infrared(NIR)light self-thermophoretic propulsion as lipase nanocarriers for fuel-free triglyceride *** light propulsion accelerates the accumulation of nanomotors on the droplet interface,and the efficient lipase loading further facilitates the rapid degradation of tributyrin *** adjusting the yolk and spiky structure,the obtained semi-yolk@spiky-shell structured nanomotors exhibit the highest capacity of lipase(442 mg/g)and the highest light-driven diffusion coefficient(ca.55%increase under 2 W/cm^(2 )irradiation),thus improving the degradation efficiency of triglyceride(93.1%under NIR light vs.66.7%without NIR light within 20 min).This work paves the way to rationally design yolk@shell structured nanomotors for diverse applications.

关键词： yolk@spiky-shell carbon@silica nanomotors self-thermophoresis triglyceride degradations

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Simulated Spatiotemporal Response of Ocean Heat Transport to Freshwater Enhancement in North Atlantic and Associated Mechanisms

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Acta meteorologica Sinica 2011年第3期25卷 364-375页

作者：于雷郜永祺 International research center Institute of Atmospheric PhysicsChinese Academy of Sciences Nansen Environmental and Remote sensing center Bjerknes Centre for Climate research

The Atlantic Meridional Overturning Circulation （AMOC） transports a large amount of heat to northern high latitudes, playing an important role in the global climate change. Investigation of the freshwater perturbation in North Atlantic （NA） has become one of the hot topics in the recent years. In this study, the mechanism and pathway of meridional ocean heat transport （OHT） under the enhanced freshwater input to the northern high latitudes in the Atlantic are investigated by an ocean-sea ice-atmosphere coupled model. The results show that the anomalous OHT in the freshwater experiment （FW） is dominated by the meridional circulation kinetic and ocean thermal processes. In the FW, OHT drops down during the period of weakened AMOC while the upper tropical ocean turns warmer due to the retained NA warm currents. Conversely, OHT recovers as the AMOC recovers, and the mechanism can be generalized as： 1） increased ocean heat content in the tropical Southern Ocean during the early integration provides the thermal condition for the recovery of OHT in NA; 2） the OttT from the Southern Ocean enters the NA through the equator along the deep Ekman layer; 3） in NA, the recovery of OHT appears mainly along the isopycnic layers of 24.70- 25.77 below the mixing layer. It is then transported into the mixing layer from the ＂outcropping points＂ in northern high latitudes, and finally released to the atmosphere by the ocean-atmosphere heat exchange.

关键词： the Atlantic meridional overturning circulation meridional ocean heat transport freshwater experiment

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Spatiotemporal Isolation Based Super-Resolution Microscopy

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Chinese Journal of Chemistry 2023年第13期41卷 1608-1623页

作者： Yuxian Lu Pinlong Zhao Jiandong Feng research center for Quantum sensing Research Institute of Intelligent SensingZhejiang LabHangzhouZhejiang311121 China Laboratory of Experimental Physical Biology Department of ChemistryZhejiang UniversityHangzhouZhejiang310027 China

Super-resolution microscopy(SRM)is a powerful imaging technique that overcomes the diffraction limit and allows imaging of the object structure in the ***,SRM suffers from a tradeoff between spatial and temporal resolution,which prevents further exploration in scientific *** this review,we mainly focus on the development of improving spatiotemporal resolution of SRM,including 1)SRM based on physical and computational principles,2)physical and computational factors affecting SRM,from which we conclude some strategies for developing new types of SRM,3)the summary of the various types of SRM based on physical and computational principles,as well as,the analysis of the ordinary and developing *** SRMs based on physical principles and computational principles can be realized with spatial isolation and temporal isolation *** expect this review will offer some new ideas to improve the spatial and temporal resolution simultaneously,which may lead to more new discoveries in biology,chemistry,and materials science.

关键词： Super-resolution imaging Fluorescence Luminescence Spatial isolation Temporal isolation

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