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Submarine groundwater discharge and associated nutrient fluxes in the Greater Bay Area, China revealed by radium and stable isotopes

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Geoscience Frontiers 2021年第5期12卷 397-410页

作者： Qianqian Wang Xuejing Wang Kai xiao yan Zhang Manhua Luo Chunmiao Zheng Hailong Li State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSouthern University of Science and TechnologyShenzhenGuangdong 518055China MOE Key Laboratory of Groundwater Circulation&Environment Evolution and School of Water Resources and Environment China University of Geosciences(Beijing)Beijing 100083China

The estuary-bay system is a common and complex coastal ***,quantifying submarine groundwater discharge(SGD)and associated nutrient fluxes in the complex coastal environment is challenging due to more dynamic and complicated riverine discharge,ocean processes and human *** this study,SGD and SFGD(submarine fresh groundwater discharge)fluxes were evaluated by combining stable and radium isotopes in the Guangdong-Hong Kong-Macao Greater Bay Area(GBA),a typical estuary-bay *** first built a spatially distributed radium mass balance model to quantify SGD fluxes in coastal areas of GBA integrating the Pearl River Estuary(PRE),bays and *** then used the stable water isotope(d2 H and d18O)end-member mixing model to distinguish submarine fresh groundwater discharge(SFGD)from *** on the 228Ra mass balance,the estimated SGD fluxes in the PRE,adjacent bay,and shelf areas were(6.14±2.74)×10^(8) m^(3) d^(-1),(3.00±1.11)×10^(7) m^(3) d^(-1),and(5.00±5.64)×10^(8) m^(3) d^(-1),*** showed that the largest area-averaged SGD was in the PRE,followed by that in the adjacent shelf and the *** differences may be mainly influenced by ocean forces,urbanization and benthic topographies controlling the variability of groundwater ***,the three end-member mixing model of ^(228)Ra and salinity was developed to confirm the validity of the estimated SGD using the Ra mass balance *** the two models,groundwater endmember and water apparent age estimation were the main sources of uncertainty in *** estimated SFGD flux was(1.39±0.76)108 m^(3) d^(-1),which accounted for approximately 12%of the total *** stable and radium isotopes was a useful method to estimate groundwater ***,the estimated SGD associated dissolved inorganic nitrogen(DIN)flux was one order of magnitude higher than other DIN *** was considered to be a significant contributor to the DIN loading to the *** findings

关键词： Radium isotopes Stable isotopes Submarine fresh groundwater discharge Nutrients Coastal aquifers Pearl River estuary

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Salvage liver transplantation in the treatment of hepatocellular carcinoma:A Meta-analysis

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World Journal of Gastroenterology 2012年第19期18卷 2415-2422页

作者： Hong-yu Li Yong-Gang Wei Lv-Nan yan Bo Li Department of Liver and Vascular Surgery Center of Liver TransplantationWest China HospitalSichuan UniversityChengdu 610041Si-chuan ProvinceChina

AIM:To evaluate survival and recurrence after salvage liver transplantation(SLT) for the treatment of hepatocellular carcinoma(HCC) compared with primary liver transplantation(PLT) using a ***:Literature on SLT versus PLT for the treatment of HCC published between 1966 and July 2011 was retrieved.A meta-analysis was conducted to estimate pooled survival and disease-free rates.A fixed or random-effect model was established to collect the ***:The differences in overall survival and disease-free survival rates at 1-year,3-year and 5-year survival rates were not statistically significant between SLT group and PLT group(P > 0.05).After stratifying the various studies by donor source and Milan criteria,we found that:(1) Living donor liver transplantation recipients had significantly higher 1-year survival rate,lower 3-year and 5-year survival rates compared with deceased-donor liver transplantation(DDLT) *** in DDLT recipients they had better 1-year and 5-year disease-free survival rate in SLT group;and(2) No difference was seen in 1-year,3-year and 5-year survival rates between two groups who beyond Milan criteria at the time of liver ***:SLT can be effectively performed for patients with recurrence or deterioration of liver function after hepatectomy for *** does not increase the perioperative mortality and has a similar long-term survival rates compared to PLT.

关键词： Salvage liver transplantation Primary livertransplantation Hepatocellular carcinoma Meta-analy-sis Survival rate

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Automated Delineation of Smallholder Farm Fields Using Fully Convolutional Networks and Generative Adversarial Networks

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Journal of Geodesy and Geoinformation Science 2022年第4期5卷 10-22页

作者： Qiuyu yan Wufan ZHAO xiao HUANG Xianwei Lyu Nanjing R&D.C PIESAT International Information Technology LimitedNanjing 210012China Department of Earth Observation Science Faculty ITCUniversity of TwenteEnschede 7500AEthe Netherlands Department of Geosciences University of ArkansasFayetteville72701.USA State Key Laboratory for Information Engineering in Surveying Mapping and Remote SensingWuhan 430079China

Accurate boundaries of smallholder farm fields are important and indispensable geo-information that benefits farmers,managers,and policymakers in terms of better managing and utilizing their agricultural *** to their small size,irregular shape,and the use of mixed-cropping techniques,the farm fields of smallholder can be difficult to delineate *** recent years,numerous studies on field contour extraction using a deep Convolutional Neural Network(CNN)have been ***,there is a relative shortage of labeled data for filed boundaries,thus affecting the training effect of *** methods mostly use image flipping,and random rotation for data *** this paper,we propose to apply Generative Adversarial Network(GAN)for the data augmentation of farm fields label to increase the diversity of ***,we propose an automated method featured by Fully Convolutional Neural networks(FCN)in combination with GAN to improve the delineation accuracy of smallholder farms from Very High Resolution(VHR)*** first investigate four State-Of-The-Art(SOTA)FCN architectures,i.e.,U-Net,PSPNet,SegNet and OCRNet,to find the optimal architecture in the contour detection task of smallholder farm ***,we apply the identified optimal FCN architecture in combination with Contour GAN and pixel2pixel GAN to improve the accuracy of contour *** test our method on the study area in the Sudano-Sahelian savanna region of northern *** best combination achieved F1 scores of 0.686 on Test Set 1(TS1),0.684 on Test Set 2(TS2),and 0.691 on Test Set 3(TS3).Results indicate that our architecture adapts to a variety of advanced networks and proves its effectiveness in this *** conceptual,theoretical,and experimental knowledge from this study is expected to seed many GAN-based farm delineation methods in the future.

关键词： field boundary contour detection fully convolutional neural networks generative adversarial networks

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Asymmetric migration dynamics of the tropical Asian and Australasian floras

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Plant Diversity 2023年第1期45卷 20-26页

作者： Li-Guo Zhang xiao-Qian Li Wei-Tao Jin yu-Juan liu Yao Zhao Jun Rong xiao-Guo Xiang Jiangxi Province Key Laboratory of Watershed Ecosystem Change and Biodiversity Institute of Life Science and School of Life SciencesNanchang UniversityNanchang.Jiangxi330031China State Key Laboratory of Systematic and Evolutionary Botany Chinese Academy of SciencesBeijing.100093China

The tropical Asian and Australasian floras have a close relationship,and is a vital distribution pattern of seed plants *** estimated,more than 81 families and 225 genera of seed plants distributed between tropical Asia and ***,the evolutionary dynamics of two floras were still ***,a total of 29 plant lineages,represented the main clades of seed plants and different habits,were selected to investigate the biotic interchange between tropical Asia and Australasia by integrated dated phylogenies,biogeography,and ancestral state *** statistics indicated that 68 migrations have occurred between tropical Asia and Australasia since the middle Eocene except terminal migrations,and the migration events from tropical Asia to Australasia is more than 2 times of the *** 12 migrations occurred before 15 Ma,whereas the remaining56 migrations occurred after 15 *** number of potential dispersal events(MDE) analysis also shows obvious asymmetry,with southward migration as the main feature,and indicates the climax of bi-directional migrations occurred after 15 *** speculate that the formation of island chains after the Australian-Sundaland collision and climate changes have driven seed plant migrations since the middle ***,biotic dispersal and stable habitat may be crucial for floristic interchange between tropical Asia and Australasia.

关键词： Tropical Asia-Australasia Floristic interchange Biogeography Dispersal Seed plants

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Territory maximization hypothesis during peripheral nerve regeneration

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Neural Regeneration Research 2018年第2期13卷 230-231页

作者： jiu-xu deng jian weng yu-hui kou pei-xun zhang yan-hua wang na han bao-guo jiang xiao-feng yin department of orthopedics and trauma peking university people's hospitalBeijingChina

Territory awareness refers to the notion that an organism lives in a territory, considers this territory its own, and prevents entry of other organisms. Generally, an organism maximizes its territory for best survival... 详细信息

关键词： Territory maximization hypothesis during peripheral nerve regeneration

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Genome-wide microarray-based analysis of miRNAs expression in patients with acute-onchronic liver failure

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Hepatobiliary & Pancreatic Diseases International 2014年第1期13卷 32-39页

作者： Wen Chen Ze-Hui yan yu-Ming Wang Bao-yan Xu Guo-Hong Deng Institute of Infectious Diseases Southwest Hospital Third Military Medical University Chongqing Key Laboratory for Research of Infectious Diseases

BACKGROUND: Acute-on-chronic liver failure(ACLF) is a severe clinical syndrome that may cause a high mortality. However, the mechanism is still not clear. Characterization of the microRNA(miRNA) profiles in ACLF patients may provide new clues to the pathogenesis and management of this syndrome. METHODS: Genome-wide microarray was performed to compare the different miRNA expression profiles in peripheral blood mononuclear cells of a pair of monozygotic twins, an ACLF patient and an HBV asymptomatic carrier(AsC). The case-control miRNA profiles were compared and confirmed by quantitative reverse transcription-polymerase chain reaction in 104 ACLF patients and 96 AsCs. A combined computational prediction algorithm was used to predict the potential target genes. RESULTS: Forty-five miRNAs were increased and eight miRNAs were decreased in the ACLF group. The expressions of hsa-let-7a and hsa-miR-16 were increased by 8.58- and 8.63-fold in ACLF patients compared with that in AsCs, respectively(P<0.001). CARD8, BCL2, IL1RAPL1, LTB, FZD10 and EDA were identified as the target genes of hsa-miR-16; MAP4K3, OPRM1, IGF2BP1 and CERCAM were verified as the target genes of hsa-let-7a. CONCLUSIONS: Our results showed that there is a close relationship between specific miRNAs of peripheral blood mononuclear cells and ACLF. hsa-miR-16 and hsa-let-7a may contribute to the development of ACLF.

关键词： acute-on-chronic liver failure microRNA microarray twins

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A blind watermarking algorithm for 3D mesh models based on vertex curvature

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第5期15卷 351-362页

作者： Yong-zhao ZHAN yan-ting LI Xin-yu WANG Yi QIAN School of Computer Science and Communication Engineering Jiangsu University

We propose a robust blind watermarking algorithm for three-dimensional(3D)mesh models based on vertex curvature to maintain good robustness and improve visual masking in 3D mesh *** the embedding process,by using the local window of vertex,the root mean square curvature is calculated for every vertex of the 3D mesh model and an ordered set of fluctuation values is *** to the ordered fluctuation values,the vertices are separated into *** each bin the fluctuation values are ***,the mean of the root mean square curvature fluctuation values of the vertices in each bin is modulated to embed watermark *** watermark detection,the algorithm uses a blind watermark extraction technique to extract the watermark *** experimental results show that the algorithm has a very good performance for visual masking of the embedded model and that it can resist a variety of common attacks such as vertex rearrangement,rotation,translating,uniform scaling,noise,smoothing,quantization,and simplification.

关键词： Three-dimensional mesh model Visual masking Root mean square curvature Blind watermarking Attack resisting

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Photoluminescence of SiV centers in CVD diamond particles with specific crystallographic planes

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Chinese Physics B 2019年第1期28卷 470-477页

作者： Ying-Shuang Mei Cheng-Ke Chen Mei-yan Jiang xiao Li Yin-Lan Ruan xiao-Jun Hu College of Materials Science and Engineering Zhejiang University of Technology ARC Centre of Excellence in Nanoscale Biophotonics Institute of Photonics and Advanced Sensing University of Adelaide

We prepared the isolated micrometer-sized diamond particles without seeding on the substrate in hot filament chemical vapor deposition. The diamond particles with specific crystallographic planes and strong silicon-vacancy(SiV) photoluminescence(PL) have been prepared by adjusting the growth pressure. As the growth pressure increases from 2.5 to 3.5 kPa,the diamond particles transit from composite planes of {100} and {111} to only smooth {111} planes. The {111}-faceted diamond particles present better crystal quality and stronger normalized intensity of SiV PL with a narrower bandwidth of 5 nm. Raman depth profiles show that the SiV centers are more likely to be formed on the near-surface areas of the diamond particles, which have poorer crystal quality and greater lattice stress than the inner areas. Complex lattice stress environment in the near-surface areas broadens the bandwidth of SiV PL peak. These results provide a feasible method to prepare diamond particles with specific crystallographic planes and stronger SiV PL.

关键词： diamond particle SiV center photoluminescence crystallographic planes

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Detection of carboxyhemoglobin in patients with hepatic encephalopathy due to hepatitis B virus-related cirrhosis

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Chinese Medical Journal 2012年第22期125卷 3991-3996页

作者： SUN xiao-yu DUAN Zhi-jun LI yan-lian CHANG Qing-shan Dalian Med Univ Affiliated Hosp 1 Dept Gastroenterol Dalian 116011 Liaoning Peoples R China Dalian Med Univ Affiliated Hosp 1 Dept Lab Dalian 116011 Liaoning Peoples R China Dalian Infect Dis Hosp Intens Care Unit Dalian 116001 Liaoning Peoples R China

Background The heme oxygenase/carbon monoxide （HO/CO） system plays an important role in the development of hepatic fibrosis. The level of the HO/CO can be directly obtained by determining the carboxyhemoglobin （COHb） level. The aims of this study were to reveal the significance of COHb in patients with hepatitis B virus-related cirrhosis （HBC） complicated by hepatic encephalopathy （HE）, and to further investigate the influence of the HO/CO pathway on the end-stage cirrhosis, hoping to find a reliable indicator to evaluate the course of HBC. Methods According to the diagnostic criteria, 63 HBC inpatients with HE were enrolled in group H. Patients regaining awareness with current therapies were categorized into group P-H. Comparisons were made with a control group （group N） consisting of 20 health volunteers. The levels of COHb, partial pressure of oxygen （PaO2） and oxygen saturation （SaO2） were determined by arterial blood gas analysis method. The incidences of hepatorenal syndrome （HRS）, upper gastrointestinal bleeding, esophagogastric varices and spontaneous bacterial peritonitis （SBP） in group H were recorded. COHb levels in different groups were compared, and the correlations of COHb levels with HE grades （I, II, III, and IV）, PaO2, SaO2 and hypoxemia were analyzed. Results The COHb level in group P-H （（1.672＋0.761）%） was significantly higher than that in group N （（0.983±0.231）%）（P 〈0.01 ）, and the level in group H （（2.102±1.021）%） was significantly higher than groups P-H and N （P 〈0.01 ）. A positive correlation was observed between the COHb concentration and the grade of HE （rs=0.357, P=-0.004）. There were no significant differences of COHb levels between HE patients with and without complications such as esophagogastric varices （（2.302±1.072）% vs. （1.802±1.041）%, P 〉0.05） or the occurrence of SBP （（2.960±0.561）% vs. （2.030±1.021）%, P 〉0.05）. Compared with HE patients with HRS, the level of COHb was significantly higher in HE patients without HRS （（2.502±1.073）

关键词： hepatitis B-related cirrhosis hepatic encephalopathy carboxyhemoglobin

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Efficacy of Banxia Xiexin decoction in a rat model of chronic atrophic gastritis

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Journal of Traditional Chinese Medicine 2019年第6期39卷 867-874页

作者： Bai yu Chen Yongcan Chen yu yan Maoxiang Wei Hongquan Wang Hengcang Zeng Guoliang yang Xiyin Department of Internal Medicine of Traditional Chinese Medicine Zhejiang Academy of Traditional Chinese MedicineHangzhou 310007China Department of Experimental Animal Center Zhejiang Academy of Traditional Chinese MedicineHangzhou 310007China Department of Second Center Laboratory Zhejiang Provincial Hospital of Traditional Chinese MedicineHangzhou 310006China Department of Pathology Zhejiang Academy of Traditional Chinese MedicineHangzhou 310007China

OBJECTIVE:To investigate the effectiveness of Banxia Xiexin decoction(BXD)in a rat model of chronic atrophic gastritis(CAG).METHODS:Sixty 6-week-old healthy Wistar rats(30 males,30 females)were used in the present study.A rat model of CAG was successfully established using the combined active immunization/ethanol/sodium deoxycholate *** was prepared from a mixture of seven Chinese herbs,and was intragastrically administered to CAG rats at three different doses(6,12,and 24 g·kg^-1·d^-1).Af-ter 24 weeks,the rats were euthanized,and gastric tissue specimens were *** mucosal specimens were stained with hematoxylin and eosin for histological examination to evaluate the degree of inflammation and morphological *** staining was performed to examine the mucosal expression of proliferating cell nuclear *** gastrin levels were measured using *** expression of Notch signaling-associated genes was examined by quantitative polymerase chain reaction and Western blot ***:BXD at all three doses significantly reversed the adverse effects generated by CAG in *** with control rats,the CAG rats who were administered BXD had an accelerated growth rate,reduced inflammatory cell infiltration,improved gastric mucosal morphology,augmented thickness of the gastric mucosa,increased number of gastric glands,enhanced mucosal expression of proliferating cell nuclear antigen,and elevated serum gastrin levels.

关键词： Gastritis,atrophic Receptors,Notch Gastrins Inflammation Banxia Xiexin decoction

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