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Variations of Dissolved Iron in the Amur River During an Extreme Flood Event in 2013

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Chinese Geographical Science 2016年第5期26卷 679-686页

作者： YAN Baixing guan Jiunian Vladimir SHESTERKIN ZHU hui Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences School of Environment Northeast Normal University Institute of Water and Ecology Problems Far Eastern Branch Russian Academy of Sciences

As a key factor limiting primary productivity in marine ecosystem, dissolved iron(DFe) export from fluvial systems has increased recently. There is particular concern about discharges of DFe during extreme flooding, when they are thought to increase considerably. An extreme flood event that caused inundation of extensive areas of Far Eastern Russia and Northeastern China occurred in the basin of the Amur River during summer and autumn 2013. During this event, water samples were collected in the middle reaches of the Amur River and the lower reaches at Khabarovsk City and analyzed for DFe concentrations and other aquatic parameters. The results show that the average DFe concentrations in the middle reaches of the Amur River(right bank) and at Khabarovsk were 1.11 mg/L and 0.32 mg/L, respectively, during the extreme flood in 2013. The total discharge of DFe during the flood event was 6.25 × 104 t. The high discharge of DFe during the flood reflects the elevated discharge of the river, hydrologically connected riparian wetlands, vast quantities of terrestrial runoff, and flood discharges from the Zeya and Bureya reservoirs. These results show that long-term monitoring is needed to identify and assess the impacts of DFe transport on the downstream reaches, estuarine area, and coastal ecosystems of the Amur River.

关键词： dissolved iron dissolved organic matter extreme flooding event land use the Amur River wetland

Exponential Synchronization of Impulsive Complex Networks with Output Coupling

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International Journal of Automation and computing 2013年第4期10卷 350-359页

作者： yue-hui Zhao Jin-Liang Wang College of Post and Telecommunication of Wuhan Institute of Technology Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University

This paper proposes a new impulsive complex delayed dynamical network model with output coupling, which is totally different from some existing network models. Then, by employing impulsive delay differential inequalities, some sufficient conditions are obtained to guarantee the global exponential state synchronization and output synchronization of the impulsive complex delayed dynamical network. Finally, two numerical examples are given to demonstrate the effectiveness of the obtained results.

关键词： Impulsive complex networks output coupling state synchronization output synchronization impulsive delay differential inequalities.

Enhanced Temporal Correlation for Universal Lesion Detection

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Computer Modeling in Engineering & Sciences 2024年第3期138卷 3051-3063页

作者： Muwei Jian yue Jin hui Yu School of Computer Science and Technology Shandong University of Finance and EconomicsJinanChina School of Information Science and Technology Linyi UniversityLinyiChina School of Creative Technologies University of PortsmouthPortsmouthUK

Universal lesion detection(ULD)methods for computed tomography(CT)images play a vital role in the modern clinical medicine and intelligent *** is well known that single 2D CT slices lack spatial-temporal characteristics and contextual information compared to 3D CT ***,3D CT blocks necessitate significantly higher hardware resources during the learning ***,efficiently exploiting temporal correlation and spatial-temporal features of 2D CT slices is crucial for ULD *** this paper,we propose a ULD network with the enhanced temporal correlation for this purpose,named *** designed TCE module is applied to enrich the discriminate feature representation of multiple sequential CT ***,we employ multi-scale feature maps to facilitate the localization and detection of lesions in various *** experiments are conducted on the DeepLesion benchmark demonstrate that thismethod achieves 66.84%and 78.18%for FS@0.5 and FS@1.0,respectively,outperforming compared state-of-the-art methods.

关键词： Universal lesion detection computational biology medical computing deep learning enhanced temporal correlation

Development of nitrogen and sulfur-doped carbon dots for cellular imaging

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Journal of Pharmaceutical Analysis 2019年第2期9卷 127-132页

作者： hui Liu yue Zhang Chengzhi Huang Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of EducationCollege of Pharmaceutical SciencesSouthwest University Chongqing Key Laboratory of Biomedical Analysis (Southwest University) Chongqing Science & Technology CommissionCollege of Chemistry and Chemical EngineeringSouthwest University

Heteroatom-doped carbon dots(CDs) have attracted extensive interest because of their improved electronic and fluorescence properties with heteroatom doping. In this study, a new synthetic method for nitrogen(N) and sulfur(S)-doped CDs was developed via a hydrothermal method using methionine and citric acid as raw materials. The as-prepared CDs exhibit excellent optical properties and good biocompatibility. The spherical N,S-doped CDs have an average diameter of 5 nm. They consist of C, O, N and S, and take on excellent water solubility due to the hydroxyl and carboxyl, amino groups on the *** CDs have a photoluminescence quantum yield of 13.8% using quinine sulfate as a reference; the average fluorescence lifetime of the CDs was 3.67 ns. The CDs solution present good photoluminescence properties, and the maximum excitation wavelength and emission wavelength locate at 330 nm and405 nm, respectively. In addition, their fluorescence intensity almost does not change under the conditions of acid, alkali, and high salt, which indicated their anti-photobleaching property and good light stability. Based on the good biocompatibility and strong fluorescence emission of the CDs, they can be used as fluorescent imaging reagents.

关键词： N,S-doped carbon dots Fluorescent reagent Cellular imaging

Postsynthetic functionalization of covalent organic frameworks

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National Science Review 2020年第1期7卷 170-190页

作者： Yusran Yusran Xinyu guan hui Li Qianrong Fang Shilun Qiu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Departement of Chemistry Jilin University

Covalent organic frameworks(COFs) have been at the forefront of porous-material research in recent years. With predictable structural compositions and controllable functionalities, the structures and properties of COFs could be controlled to achieve targeted materials. On the other hand, the predesigned structure of COFs allows fruitful postsynthetic modifications to introduce new properties and functions. In this review, the postsynthetic functionalizations of COFs are discussed and their impacts towards structural qualities and performances are comparatively elaborated on. The functionalization involves the formation of specific interactions(covalent or coordination/ionic bonds) and chemical reactions(oxidation/reduction reaction) with pendant groups, skeleton and reactive linkages of COFs. The chemical stability and performance of COFs including catalytic activity, storage, sorption and opto-electronic properties might be enhanced by specific postsynthetic functionalization. The generality of these strategies in terms of chemical reactions and the range of suitable COFs places them as a pivotal role for the development of COF-based smart materials.

关键词： covalent organic frameworks crystalline materials porous materials postsynthetic functionalization

Expression profiles of microRNAs after focal cerebral ischemia/reperfusion injury in rats

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Neural Regeneration Research 2012年第12期7卷 917-923页

作者： Fengguo Zhai Xiuping Zhang yue guan Xudong Yang Yang Li Gaochen Song Lixin guan Department of Pharmacology Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China Department of Endocrinology Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China Department of Thoracic Surgery Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China Department of Biochemistry Mudanjiang Medical University Mudanjiang 157011 Heilongjiang Province China

Rat models of focal cerebral ischemia/reperfusion injury were established by occlusion of the middle cerebral artery. Microarray analysis showed that 24 hours after cerebral ischemia, there were nine up-regulated and 27 down-regulated microRNA genes in cortical tissue. Bioinformatic analysis showed that bcl-2 was the target gene of microRNA-384-5p and microRNA-494, and caspase-3 was the target gene of microRNA-129, microRNA-320 and microRNA-326. Real-time PCR and western blot analyses showed that 24 hours after cerebral ischemia, bcl-2 mRNA and protein levels in brain tissue were significantly decreased, while caspase-3 mRNA and protein levels were significantly increased. This suggests that following cerebral ischemia, differentially expressed microRNA-384-5p, microRNA-494, microRNA-320, microRNA-129 and microRNA-326 can regulate bcl-2 and caspase-3 expression in brain tissue.

关键词： focal cerebral ischemia microRNA apoptosis bcl-2 caspase-3 neural regeneration

Uniqueness to Some Inverse Source Problems for the Wave Equation in Unbounded Domains

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Acta Mathematicae Applicatae Sinica 2020年第1期36卷 134-150页

作者： guang-hui HU Yavar KIAN yue ZHAO Beijing Computational Science Research Center Beijing 100193China Aix Marseille Univ Universit’e de ToulonCNRSCPTMarseilleFrance School of Mathematics and Statistics Central China Normal UniversityWuhan 430079China

This paper is concerned with inverse acoustic source problems in an unbounded domain with dynamical boundary surface data of Dirichlet *** measurement data are taken at a surface far away from the source *** prove uniqueness in recovering source terms of the form f(x)g(t)and f(x1,x2,t)h(x3),where g(t)and h(x3)are given and x=(x1,x2,x3)is the spatial variable in three *** these a priori information,we prove that the boundary data of a family of solutions can be used to recover general source terms depending on both time and spatial *** moving point sources radiating periodic signals,the data recorded at four receivers are prove sufficient to uniquely recover the orbit *** determination of embedded obstacles and source terms was verified in an inhomogeneous background medium using the observation data of infinite time *** approach depends heavily on the Laplace transform.

关键词： Inverse source problems Laplace transform moving point source uniqueness

Inverted Organic Solar Cells with Improved Performance using Varied Cathode Buffer Layers

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Chinese Journal of Chemical Physics 2012年第5期25卷 625-630,I0004页

作者： Zhi-qiang guan Jun-sheng Yu yue Zang Xing-xin Zeng State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Infor-mationUniversity of Electronic Science and Technology of ChinaChengdu 510054China

Organic solar cells with inverted planar heterojunction structure based on subphthalocya- nine and C60 were fabricated using several kinds of materials as cathode buffer layer （CBL）, including tris-8-hydroxy-quinolinato aluminum （Alq3）, bathophenanthroline （Bphen）, bathocuproine, 2,3,8,9,14,15-hexakis-dodecyl-sulfanyl-5,6,11,12,17,18-hexaazatrinaphthylene （HATNA）, and an inorganic compound of Cs2CO3. The influence of the lowest unoccupied molecular orbital level and the electron mobility of organic CBL on the solar cells perfor- mance was compared. The results showed that Alq3, Bphen, and HATNA could significantly improve the device performance. The highest efficiency was obtained from device with an- nealed HATNA as CBL and increased for more than 7 times compared with device without CBL. Furthermore~ the simulation results with space charge-limited current theory indicated that the Schottky barrier at the organic/electrode interface in inverted OSC structure was reduced for 27% by inserting HATNA CBL.

关键词： Organic solar cell Inverted structure Subphthalocyanine/C60 Cathode bufferlayer Space charge-limited current theory

Different accretion and diagenetic patterns within the fabrics of the Permian–Triassic boundary microbialites on the Leye isolated carbonate platform, South China Block

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Journal of Palaeogeography 2021年第2期10卷 197-208页

作者： Xi-Yang Zhang yue Li guan Wang Hong-Qiang Yang Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyInnovation Academy of South China Sea Ecology and Environmental EngineeringChinese Academy of SciencesGuangzhou 510301Guangdong ProvinceChina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina.

A comprehensive study on the accretion and diagenesis of the Permian–Triassic boundary microbialites is conducive to a better understanding of the ecological community after the end-Permian mass extinction. Here we studied the special microbialite sequences at the Tianba section of Leye isolated carbonate platform, South China Block. The microbialites are shown as small columnar stromatolites, stromatolitic thrombolites, spotted thrombolites,and domical digitate thrombolites in an ascending order. Thin section analyses, coupled with cathodoluminescence photos and oxygen isotopic data, reveal that all types of microbially-mediated laminae/clots are partly *** of the Polybessurus-like fossils commonly occur in the recrystallized fabrics of stromatolitic laminae. However,the Polybessurus-like fossils are rare in quantity and generally fragmentary and structureless in stromatolitic clots and spotted clots. Such taphonomic features are likely interpreted as the early decomposition by heterotrophic bacteria in an oxygen-depleted microenvironment caused by rapid accumulations of organic matter in the calm *** enrichments of ~(13)C in the laminae of stromatolite and in the clots of stromatolitic thrombolite and spotted thrombolite than in adjacent interstitial matrixes signify the photosynthesis-dominated isotopic fractionation during the growth of microbial communities. Rare calcimicrobial structures but many calcite crystal fans were found in the ~(13)C-depleted digitate clots. These phenomena indicate that seawater on the carbonate platform was ~(12)C-enriched and supersaturated, accelerating carbonate precipitations and decompositions of organic matter within the microbial community. Different preservations of the Polybessurus-like fossil revealed the complicated microbiallydominated sedimentation and post-depositional diagenesis in the abnormal seawater after the catastrophe.

关键词： Microbialite Calcimicrobe Carbon isotope Diagenesis End-Permian mass extinction South China Block