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| 1 | The remote sensing inversion theory of offshore oil slick thickness based on a two-beam interference model显示文摘Offshore oil slicks are significant for both the monitoring of marine spill accidents and the detection of marine oil resources.The use of remote sensing technology to detect the thickness of oil slicks is a major area of research.The reflected light from oil slicks changes with the thickness of the oil.This is the theoretical basis of research on optical remote sensing of offshore oil slicks.A two-beam interference model that considers the offshore oil slick as a flat plate has been developed in this study.A quantitative remote sensing model which describes a series of processes that use oil slick thickness and reflectance as variables is established.The use of the Fresnel equation to analyze parameters in the model indicated that the key property of the quantitative relationship between the oil slick thickness and reflectance was ultimately the disappearance or extinction of the oil slick.This model has been tested and verified by data from offshore oil slick spectral response experiments.Results showed that the oil slick thickness remote sensing model can be theoretically analyzed and is efficient.The research indicated that the major cause of variations in the spectral response as a function of oil slick thickness was the different light-scattering characteristics.These characteristics can be used in remote sensing applications to identify the different types of offshore oil slicks.The theoretical interpretation of each parameter in this model led to the development of a look-up table of the model parameters which will improve the efficiency of future offshore oil slick remote sensing. | LU YingCheng TIAN QingJiu LI Xiang | 2011 | Science China Earth Sciences2011，54，5： | 10 |
| 2 | Experimental study on spectral responses of offshore oil slick显示文摘Using the seawater taken from Liaodong Bay and crude oil taken from Liaohe Oilfield,a laboratory experiment was designed to study the change of reflectance spectrum of artificial offshore oil slick with its thickness and to identify the spectrum ranges suitable for quantifying the thickness of the oil slick.During the experiment,crude oil was continuously dropped into the seawater to generate artificial oil slick with different thicknesses.After every drop of crude oil was added,reflectance spectrum of the oil slick was measured with a high resolution spectroradiometer(ASD FieldSpec Pro FR).The influence of oil slick thickness on its reflectance spectrum was explored through statistical analysis.The results show that the reflectance of oil slick changes marginally with oil slick thickness and higher than that of seawater in infrared band from 1150 to 2500 nm.This spectrum range can be practically used to distinguish oil slick from seawater.In the spectrum range from 400 to 1150 nm,the reflectance of oil slick decreases with its thickness.The negative power function is the best-fit function expressing the relationship between the reflectance and thickness.The spectral characteristics of oil slick are very distinct at 550 and 645 nm.They are the best wavelengths for monitoring the existence of offshore oil slick and estimating its thickness. | LU YingCheng TIAN QingJiu WANG JingJing WANG XiangCheng QI XiaoPing | 2008 | Chinese Science Bulletin2008，53，24： | 6 |
| 3 | 3D-printing of integrated spheres as a superior support of phosphotungstic acid for deep oxidative desulfurization of fuel显示文摘Construction of catalysts with integral structure for oxidative reaction process is an essential promotion to catalysts in industrial application.In this work,a 3D printing method was employed to prepare 3D printed spheres(3D-PSs),followed by carbonization to form 3D carbon spheres(3D-CSs).Then,a 3D-CSs supported phosphotungstic acid(HPW/3D-CSs)was prepared for deep oxidative desulfurization.Compared with traditional powder catalysts,the as-prepared catalyst is easy to be operated and separated from oil products.The supported catalyst possesses excellent catalytic performance and the removal of DBT,4-MDBT and 4,6-DMDBT in fuel oil,reaching^100%of sulfur removal.The effects of various experimental parameters on desulfurization efficiency were considered to optimize reaction conditions.Moreover,the catalyst shows excellent thermal and chemical stability,with no obvious decrease in desulfurization activity after 5 cycles.GC–MS analysis indicates DBT sulfone was the solely oxidized product of DBT. | Jie Zhu Peiwen Wu Linlin Chen Jing He Yingcheng Wu Chao Wang Yanhong Chao Linjie Lu Minqiang He Wenshuai Zhu Huaming Li | 2020 | Journal of Energy Chemistry2020，29，6： | 2 |
| 4 | Determining oil slick thickness using hyperspectral remote sensing in the Bohai Sea of China显示文摘Determining oil slick thickness plays an important role in assessing oil spill volume and its environmental impacts on the ocean.In this study,we used a Hyperion image of an oil spill accident area and seawater and fresh crude oil samples collected in the Bohai Sea of China.A well-controlled laboratory experiment was designed to simulate spectral responses to different oil slick thicknesses.Spectral resampling and normalization methods were used to reduce the differences in spectral reflectances between the experimental background seawater sample and real background seawater.Fitting the analysis with laboratory experimental data results showed a linear relationship between normalized oil slick reflectance and normalized oil slick thickness[20th band(R^(2)-0.92938,n=49,pB0.01),26th band(R^(2)=0.93806,n=49,pB0.01),29th band(R^(2)=0.93288,n=49,pB0.01)].By using these statistical models,we successfully determined the normalized oil slick thickness with the Hyperion image.Our results indicate that hyperspectral remote sensing technology is an effective method to monitor oil spills on water.The spectral ranges of visible green and red light were the optimal bands for estimating oil slick thickness in case 2 water.The high,stabilized spectral reflectance of background seawater will be helpful in oil slick thickness inversion. | Yingcheng Lu Qingjiu Tian Xinyuan Wang Guang Zheng Xiang Li | 2013 | International Journal of Digital Earth2013，6，1： | 2 |
| 5 | An alternative approach to determine critical angle of contrast reversal and surface roughness of oil slicks under sunglint显示文摘The critical angle is the angle at which the contrast of oil slicks reverse their contrasts against the surrounding oil-free seawater under sunglint.Accurate determination of the critical angle can help estimate surface roughness and refractive index of the oil slicks.Although it’s difficult to determine a certain critical angle,the potential critical angle range help to improve the estimation accuracy.In this study,the angle between the viewing direction and the direction of mirror reflection is used as an indicator for quantifying the critical angle and could be calculated from the solar/viewing geometry from observations of the Moderate Resolution Imaging Spectroradiometer(MODIS).The natural seep oil slicks in the Gulf of Mexico were first delineated using a customized segmentation approach to remove noise and apply a morphological filter.On the basis of the histograms of the brightness values of the delineated oil slicks,the potential range of the critical angle was determined,and then an optimal critical angle between oil slicks and seawater was then determined from statistical and regression analyses in this range.This critical angle corresponds to the best fitting between the modeled and observed surface roughness of seep oil slicks and seawater. | Yansha Wen Mengqiu Wang Yingcheng Lu Shaojie Sunc Minwei Zhang Zhihua Mao Jing Shi Yongxue Liu | 2018 | International Journal of Digital Earth2018，11，9： | 1 |
| 6 | Optical Remote Sensing of Oil Spills in the Ocean: What Is Really Possible?显示文摘Optical remote sensing(ORS)of reflected sun light has been used to assess oil spills in the ocean for several decades.While most applications are toward simple presence/absence detections based on the spatial contrast between oiled water and oil-free water,recent advances indicate the possibility of classifying oil types and quantifying oil volumes based on their spectral contrasts with oil-free water.However,a review of the current literature suggests that there is still confusion on whether this is possible and,if so,how.Here,based on the recent findings from numerical models,laboratory measurements,and applications to satellite or airborne imagery,we attempt to clarify this situation by summarizing(1)the optics behind oil spill remote sensing,and in turn,(2)how to interpret optical remote sensing imagery based on optical principles.In the end,we discuss the existing limitations and challenges as well as pathways forward to advance ORS of oil spills. | Chuanmin Hu Yingcheng Lu Shaojie Sun Yongxue Liu | 2021 | Journal of Remote Sensing2021，，1： | 1 |
| 7 | Progress in Marine Oil Spill Optical Remote Sensing: Detected Targets, Spectral Response Characteristics, and Theories显示文摘 | Yingcheng Lu Xiang Li Qingjiu Tian Guang Zheng Shaojie Sun Yongxue Liu Qiang Yang | 2013 | Marine Geodesy2013，，3： | 1 |
| 8 | Few-layered hexagonal boron nitride nanosheets stabilized Pt NPs for oxidation promoted adsorptive desulfurization of fuel oil显示文摘A few-layered hexagonal boron nitride nanosheets stabilized platinum nanoparticles(Pt/h-BNNS)is engineered for oxidation-promoted adsorptive desulfurization(OPADS)of fuel oil.It was found that the few-layered structure and the defective sites of h-BNNS not only are beneficial to the stabilization of Pt NPs but also favor the adsorption of aromatic sulfides.By employing Pt/h-BNNS with a Pt loading amount of 1.19 wt%as the active adsorbent and air as an oxidant,a 98.0%sulfur removal over dibenzothiophene(DBT)is achieved along with a total conversion of the DBT to the corresponding sulfones(DBTO_(2)).Detailed experiments show that the excellent desulfurization activity originates from the few-layered structure of h-BNNS and the high catalytic activity of Pt NPs.In addition,the OPADS system with Pt/h-BNNS as the active adsorbent shows remarkable stability in desulfurization performance with the existence of different interferents such as olefin,and aromatic hydrocarbons.Besides,the Pt/h-BNNS can be recycled 12 times without a significant decrease in desulfurization performance.Also,a process flow diagram is proposed for deep desulfurization of fuel oil and recovery of high value-added products,which would promote the industrial application of such OPADS strategy. | Peiwen Wu Xin Song Linlin Chen Lianwen He Yingcheng Wu Duanjian Tao Jing He Chang Deng Linjie Lu Yanhong Chao Mingqing Hua Wenshuai Zhu | 2024 | Green Energy & Environment2024，9，3： | 0 |
| 9 | Engineering 3D-printed aqueous colloidal ceramic slurry for direct ink writing显示文摘The construction of rapid prototyping for structured ceramics has a promoting effect on potential applications.In this work,engineering slurry with different formulations were used to develop aqueous colloidal ceramic slurry for direct ink writing(DIW).Optimized slurry of Formulation 5 possessed good printing effect for DIW with stable mechanical properties.Related characteristics,including shrinkage,compressive strength,rheological behavior,and chemical property,were also examined.DIW ceramics prepared from optimized slurry can be preliminarily applied to adsorption of Rhodamine B and chlortetracycline,and possessed the advantages of easy separation and operation compared with powder adsorbents.This work provides a strategy for the design of 3D-printed kaolin ceramic slurry,and also extends to potential application in adsorption. | Jie Zhu Jiangtao Yu Yingcheng Wu Yanhong Chao Peiwen Wu Linjie Lu Linlin Chen Jing He Wenshuai Zhu | 2023 | Green Chemical Engineering2023，4，1： | 0 |
| 10 | Dynamical-invariant-based holonomic quantum gates:Theory and experiment显示文摘Among existing approaches to holonomic quantum computing,the adiabatic holonomic quantum gates(HQGs)suffer errors due to decoherence,while the non-adiabatic HQGs either require additional Hilbert spaces or are difficult to scale.Here,we report a systematic,scalable approach based on dynamical invariants to realize HQGs without using additional Hilbert spaces.While presenting the theoretical framework of our approach,we design and experimentally evaluate single-qubit and two-qubits HQGs for the nuclear magnetic resonance system.The single-qubit gates acquire average fidelity 0.9972 by randomized benchmarking,and the controlled-NOT gate acquires fidelity 0.9782 by quantum process tomography.Our approach is also platform-independent,and thus may open a way to large-scale holonomic quantum computation. | Yingcheng Li Tao Xin Chudan Qiu Keren Li Gangqin Liu Jun Li Yidun Wan Dawei Lu | 2023 | Fundamental Research2023，3，2： | 0 |
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