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| 1 | Rapid detection to long ship wake in synthetic aperture radar satellite imagery显示文摘The maritime administrative department employs synthetic aperture radar (SAR) satellite remote sensing technology to obtain evidence of illegal discharge of ships. If the ship is discharged during navigation, it forms a long dark wake on the SAR image due to the suppression of the Bragg wave by the oil fi lm. This study investigates key techniques for rapid detection of long ship wakes, thereby providing law enforcement agencies with candidate ships for possible discharge. This paper presents a rapid long ship wake detection method that uses satellite imaging parameters and the axial direction of the ship in images to determine the potential detection area of the wake. Then, the threshold of long ship wake detection is determined using statistical analysis, the area is binarized, and isolated points are removed using a morphological filter operator. The method was tested with ENVISAT Synthetic Aperture Radar and GF-3 SAR data, and results showed that the method was eff ective, and the overall accuracy of the decision reaches 71%. We present two innovations;one is a method that draws a Doppler shift curve, and uses the SAR imaging parameters to determine the detection area of the long wake to achieve rapid detection and reduce the image detection area. The other is where a classical linear fitting method is used to quickly and accurately determine whether the detected dark area is a long ship wake and realizes the twisted long ship wake detection caused by the sea surface flow field, which is otherwise diffi cult to detect by the traditional Radon and Hough transform methods. This method has good suppression performance for the dark spot false alarm formed by low speed wind region or upward flow. The method is developed for maritime ship monitoring system and will promote the operational application of maritime ship monitoring system. | CHEN Peng LI Xiunan ZHENG Gang | 2019 | Journal of Oceanology and Limnology2019，37，5： | 3 |
| 2 | State of the art technologies and new electrochemical methods for the reduction of vat dyes显示文摘 | ROESSLER Albert JIN Xiunan | 2003 | Dyes and Pigments2003，59，3： | 1 |
| 3 | State of the art technologiesand new electrochemical methods for the reduction of vatdyes显示文摘 | ROESSLER A JIN Xiunan | 2003 | Dyes and Pigments2003，59，3： | 1 |
| 4 | State of the art technologies and new electrochemical methods for the reduction of vat dyes 显示文摘 | Albert Roessler Xiunan Jin | 2003 | Dyes and Pigments2003，59，3： | 1 |
| 5 | Effects of thermal treatment on durability of short bamboo-fibers and its reinforced composites显示文摘 | Hongxia Fang Qianglin Wu Yongchen Hu Yonglei Wang Xiunan Yan | 2013 | Fibers and Polymers2013，，3： | 1 |
| 6 | State of the art technologies and new electro-chemical methods for the reduction of vat dyes显示文摘 | Albert Roessler Xiunan Jin | 2003 | Dyes and Pigments2003，，59： | 1 |
| 7 | State of the technologies and new electrochemical methods for the reduction of vat dyes 显示文摘 | Albert Roessler Xiunan Jin | 2003 | Dyes and Pigments2003，59，3： | 1 |
| 8 | State of the art technologies and newelectrochemical methods for the reduction of vat dyes 显示文摘 | Albert Roessler Xiunan Jin | 2003 | Dyes and Pigments2003，59，3： | 1 |
| 9 | State of the art technologies and new electrochemical methods for the reduction of vat dyes 显示文摘 | | 2003 | D&P2003，59，3： | 1 |
| 10 | Collective Synthesis of Schilancidilactones A, B and Schilancitrilactones A, B, C, 20‐epi‐Schilancitrilactone A显示文摘Summary of main observation and conclusion Schisandraceae triterpenoids are novel natural products that contain highly fused ring systems bearing multiple chiral centers surrounding. Some of them exhibit promising bioactivities, such as antitumor, anti‐HIV, etc. In this article, we describe our efforts to the collective total synthesis of schilancidilactones A, B, schilancitrilactones A, B, C, and 20‐epi‐schilancitrilactone A from common precursors. An intramolecular radical cyclization, late‐stage halogenation and AIBN‐mediated or Ni‐catalyzed intermolecular radical cross coupling reaction were employed as the key steps. | Hengtao Wang Liang Wang Yihang Li Xiunan Zhang Pingping Tang | 2019 | Chinese Journal of Chemistry2019，37，3： | 1 |
| 11 | State of the art technologies and new electrochemical methods for the reduction of vat dyes显示文摘 | Albert Roessler Xiunan Jin | 2003 | Dyes and Pigments2003，，59： | 1 |
| 12 | State of the art technologies and new electro-chemical methods for the reduction of vat dyes显示文摘 | Albert Roessler Xiunan Jin | 2003 | D&P2003，59，3： | 1 |
| 13 | Polystyrene-type Uniform Porous Microsphere Enables High Resolution and Low-Pressure Chromatography of Natural Products – A Case Study with Icariin Purification显示文摘 | Sun Haihong Li Xiunan Ma Guanghui Su Zhiguo | 2005 | Chromatographia (-)2005，，1： | 1 |
| 14 | State of the art technologies and new electrochemical methods for the reduction of vat dyes显示文摘 | Albert Roessler Xiunan Jin | 2003 | Dyes and pigments2003，59，3： | 1 |
| 15 | Compression induced crystal-to-glass transition in soft colloidal solids显示文摘Using colloidal particles with different thermosensitivities,we observe the transition from a crystalline solid to a dis-ordered glass by tuning the size mismatch of the constituent particles in quasi-two-dimensional configurations.The transition is clearly identifiable by the correlation functions of the orientational order parameters and its susceptibilities.Different from typical order-to-disorder transitions such as melting,where the underlying mechanism involves the diffusion of defects,the disordered phase in the crystal-to-glass transition grows via a nucleation process.The disordered clusters grow in size as the particle mismatch increases,and eventually percolate the whole system,which signifies the qualitative change from an ordered crystal to a disordered glass. | Li Chen Xiunan Yang Mingcheng Yang Chenhong Wang Ke Chen | 2023 | National Science Open2023，2，3： | 0 |
| 16 | Thermodynamic and kinetic mechanism of phase transformation of levofloxacin hydrochloride显示文摘In this work,thermodynamic and kinetic factors that affect formation and phase transformation process of different solid forms of levofloxacin hydrochloride were investigated in detail.Dynamic vapor sorption experiments(DVS)and varying temperature-powder X-ray diffraction(VT-PXRD)experiments were carried out to study moisture-dependent stability,thermal stability as well as the transformation process between Form I and Form II.Critical water activities of levofloxacin hydrochloride were determined in temperature range of 5.0–45.0°C.Raman spectroscopy was applied to in situ monitor the temperature-induced phase transformation and the hydration process of levofloxacin hydrochloride,and one possible mechanism consisting of multiple chemical equilibria was proposed to analyze the effect of thermodynamic and kinetic factors on the formation and transformation of different solid forms.Results show that the anhydrate,Form II would transform to the monohydrate,Form I more easily with the increasing water content.And the transition point moves toward higher water contents as the temperature increases.The results suggested that,except for thermodynamic factors,kinetic factors also play an essential role in controlling the solid forms of polymorphic compounds. | Han Liu Xiunan Zhang Ting Wang Xin Huang Kui Chen Na Wang Shanshan Yu Yuyuan Dong Hongxun Hao | 2022 | Particuology2022，20，7： | 0 |
| 17 | Continuous mechanical tuning of plasmonic nanoassemblies for tunable and selective SERS platforms显示文摘The continuous tuning of plasmonic nanoassembly's structure is the key to manipulate their optical and catalytic properties.Herein,we report a strategy of using macroscopic deformation to continuously tune the structure and optical activity of massive plasmonic nanoassemblies that are embedded in elastic polymer matrix.Plasmonic gold nanoparticles(Au NPs)are assembled to nanochains(Au NCs)with defined length and further embedded into polyvinylpyrrolidone(PVP)matrix.The nanostructure and plasmonic properties of massive Au NCs in this Au NCs-PVP film can be simultaneously and continuously tuned,simply by reversible mechanical deformation of this elastic film.In this way,the surface-enhanced Raman scattering(SERS)enhancement factor of this film as a SERS substrate can be mechanically modulated in the range of 10^(0)to 6.8×10^(7).Meanwhile,the PVP matrix also serves as a selective diffusion barrier to eliminate the fluorescence interference of large biomolecules,which enables the Au NCs-PVP film as a convenient SER S substrate for quick and direct analysis of small molecule analytes in biological samples and food,avoiding the complicate and time-consuming sample pretreatment process. | Xiunan Yan Qing Chen Qun Song Ziyu Huo Ning Zhang Mingming Ma | 2021 | Nano Research2021，14，1： | 0 |
| 18 | Metabolomic profiles in a green alga (Raphidocelis subcapitata) following erythromycin treatment: ABC transporters and energy metabolism显示文摘A recent study showed that erythromycin(ERY)exposure caused hormesis in a model alga(Raphidocelis subcapitata)where the growth was promoted at an environmentally realistic concentration(4μg/L)but inhibited at two higher concentrations(80 and 120μg/L),associated with opposite actions of certain signaling pathways(e.g.,xenobiotic metabolism,DNA replication).However,these transcriptional alterations remain to be investigated and verified at the metabolomic level.This study uncovered metabolomic profiles and detailed toxic mechanisms of ERY in R.subcapitata using untargetedmetabolomics.Themetabolomic analysis showed that metabolomic pathways including ABC transporters,fatty acid biosynthesis and purine metabolism were associated with growth promotion in algae treated with 4μg/L ERY.An overcompensation was possibly activated by the low level of ERY in algae where more resources were reallocated to efficiently restore the temporary impairments,ultimately leading to the outperformance of growth.By contrast,algal growth inhibition in the 80 and 120μg/L ERY treatments was likely attributed to the dysfunction of metabolomic pathways related to ABC transporters,energy metabolism and metabolism of nucleosides.Apart from binding of ERY to the 50S subunit of ribosomes to inhibit protein translation as in bacteria,the data presented here indicate that inhibition of protein translation and growth performance of algae by ERY may also result from the suppression of amino acid biosynthesis and aminoacyl-tRNA biosynthesis.This study provides novel insights into the dose-dependent toxicity of ERY on R.subcapitata. | Jiezhang Mo Zhihua Ma Shiwei Yan Napo KM Cheung Fangshe Yang Xiunan Yao Jiahua Guo | 2023 | Journal of Environmental Sciences2023，，2： | 0 |
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