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Detecting Double Mixed Compressed Images Based on Quaternion Convolutional Neural Network

Chinese Journal of Electronics 2024年第3期33卷 657-671页

作者： Hao WANG Jinwei WANG Xuelong HU Bingtao HU Qilin YIN Xiangyang LUO Bin MA Jinsheng sun Department of Automation Nanjing University of Science and Technology Engineering Research Center of Digital Forensics Ministry of Education Department of Computer and Software Nanjing University of Information Science and Technology School of Management Nanjing University of Posts and Telecommunications Department of Computer Science and Engineering Guangdong Province Key Laboratory of Information Security Technology Sun Yat-sen University State key laboratory of Mathematical Engineering and Advanced Computing Qilu university of Technology

Detection of color images that have undergone double compression is a critical aspect of digital image *** the existence of various methods capable of detecting double Joint Photographic Experts Group(JPEG) compression,they are unable to address the issue of mixed double compression resulting from the use of different compression *** particular,the implementation of Joint Photographic Experts Group 2000(JPEG2000)as the secondary compression standard can result in a decline or complete loss of performance in existing *** tackle this challenge of JPEG+JPEG2000 compression,a detection method based on quaternion convolutional neural networks(QCNN) is *** QCNN processes the data as a quaternion,transforming the components of a traditional convolutional neural network(CNN) into a quaternion *** relationships between the color channels of the image are preserved,and the utilization of color information is ***,the method includes a feature conversion module that converts the extracted features into quaternion statistical features,thereby amplifying the evidence of double *** results indicate that the proposed QCNN-based method improves,on average,by 27% compared to existing methods in the detection of JPEG+JPEG2000 compression.

关键词： Image coding Image color analysis Quaternions Forensics Transform coding Color Feature extraction

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Nanowires mediated growth ofβ-Ga_(2)O_(3)nanobelts for hightemperature(>573 K)solar-blind photodetectors

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Nano Research 2023年第4期16卷 5548-5554页

作者： Xiaobin Zou Dongyu Xie Yong sun Chengxin Wang State key laboratory of Optoelectronic Materials and Technologies School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China State key laboratory of Optoelectronic Materials and Technologies and guangdong province key laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China

β-Ga_(2)O_(3),with ultra-wide bandgap,high absorption coefficient for high-energy ultraviolet(UV)photons,and high structural stability toward harsh-environment,has been receiving persistent attention for deep ultraviolet photodetectors ***,realization of devices with high tolerance toward high temperature faces great challenges due to considerable background signals mainly arising from abundant thermal excited ***,nanowire-mediated high-qualityβ-Ga_(2)O_(3)nanobelts with ultra-thin thickness and length up to several hundred micrometers were achieved via a simple catalyst-free chemical vapor deposition *** resulted microdevice output superior optoelectric figure of merits among numerous reports aboutβ-Ga_(2)O_(3),i.e.,ultra-low dark current(below the detection limit of 10−12 A),high responsivity(1,320 A/W),and high spectral selectivity working under low voltage(~2 V).More importantly,the performance remains robust at elevated temperature higher than 573 *** results indicate a large prospect for low-voltage driven deep ultraviolet photodetectors with good sensitivity and stability at harsh environments.

关键词： β-Ga_(2)O_(3) low-dimensional nanostructures chemical vapor deposition high temperature photodetectors solar-blind photodetectors

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大语言模型在护理领域应用的机遇与挑战

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中国护理管理 2024年第6期24卷 929-933页

作者：汤志杰孙国珍李芸霞游展鸿王洁鲍志鹏中山大学中山眼科中心眼科学国家重点实验室广东省眼科视觉科学重点实验室广州市510060 南京医科大学护理学院南京医科大学第一附属医院心血管内科

随着人口老龄化进程加快,社会疾病负担攀升,护理行业面临重大挑战。基于人工智能技术的大语言模型不断发展,为护理实践带来了重大机遇。文章对大语言模型在护理实践与管理、护理研究、护理教育领域中的应用机遇进行综述,提出应用过程中... 详细信息

随着人口老龄化进程加快,社会疾病负担攀升,护理行业面临重大挑战。基于人工智能技术的大语言模型不断发展,为护理实践带来了重大机遇。文章对大语言模型在护理实践与管理、护理研究、护理教育领域中的应用机遇进行综述,提出应用过程中面临着隐私安全问题、健康损害风险、学术教育诚信和国内环境适用性等风险挑战,建议开发者和使用者未来组建多学科团队,妥善处理现存的隐私安全问题、健康损害风险、学术教育诚信和国内环境适用性等风险挑战,以加快护理事业在信息科技时代的发展。

关键词：大语言模型 ChatGPT 护理实践技术风险

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Secrecy Rate Analysis for Reconfigurable Intelligent Surface-Assisted MIMO Communications with Statistical CSI

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china Communications 2021年第3期18卷 52-62页

作者： Jie Liu Jun Zhang Qi Zhang Jue Wang Xinghua sun Jiangsu key laboratory of Wireless Communications Nanjing University of Posts and TelecommunicationsNanjing 210003China Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China School of information Science and Technology Nantong UniversityNantong 226019China Research Center of Networks and Communications Peng Cheng LaboratoryShenzhen 518066China School of Electronics and Communication Engineering Sun Yat-sen UniversityGuangzhou 510006China

In this paper,a reconfigurable intelligent surface(RIS)-assisted MIMO wireless secure communication system is considered,in which a base station(BS)equipped with multiple antennas exploits statistical channel state information to communicate with a legitimate multi-antenna user,in the presence of an eavesdropper,also equipped with multiple *** firstly obtain an analytical expression of the ergodic secrecy rate based on the results of largedimensional random matrix ***,a jointly alternating optimization algorithm with the method of Taylor series expansion and the projected gradient ascent method is proposed to design the transmit covariance matrix at the BS,as well as the diagonal phaseshifting matrix to maximize the ergodic secrecy *** are conducted to demonstrate the accuracy of the derived analytical expressions,as well as the superior performance of our proposed algorithm.

关键词： reconfigurable intelligent surface ergodic secrecy rate statistical CSI alternating optimization algorithm

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Recent progress in aptamer-based microfluidics for the detection of circulating tumor cells and extracellular vesicles

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Journal of Pharmaceutical Analysis 2023年第4期13卷 340-354页

作者： Duanping sun Ying Ma Maoqiang Wu Zuanguang Chen Luyong Zhang Jing Lu guangdong Provincial key laboratory of Pharmaceutical Bioactive Substances Center for Drug Research and DevelopmentGuangdong Pharmaceutical UniversityGuangzhou510006China key Specialty of Clinical Pharmacy The First Affiliated Hospital of Guangdong Pharmaceutical UniversityGuangzhou510699China National and Local United Engineering Lab of Druggability and New Drugs Evaluation School of Pharmaceutical SciencesSun Yat-Sen UniversityGuangzhou510006China

Liquid biopsy is a technology that exhibits potential to detect cancer early,monitor therapies,and predict cancer prognosis due to its unique characteristics,including noninvasive sampling and real-time *** tumor cells(CTCs)and extracellular vesicles(EVs)are two important components of circulating targets,carrying substantial disease-related molecular information and playing a key role in liquid *** are single-stranded oligonucleotides with superior affinity and specificity,and they can bind to targets by folding into unique tertiary ***-based microfluidic platforms offer new ways to enhance the purity and capture efficiency of CTCs and EVs by combining the advantages of microfluidic chips as isolation platforms and aptamers as recognition *** this review,we first briefly introduce some new strategies for aptamer discovery based on traditional and aptamer-based microfluidic ***,we subsequently summarize the progress of aptamer-based microfluidics for CTC and EV ***,we offer an outlook on the future directional challenges of aptamer-based microfluidics for circulating targets in clinical applications.

关键词： Aptamer Microfluidic Circulating tumor cells Extracellular vesicles Bioanalysis

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PM_(1)颗粒物长期暴露与高血压住院:一项基于中国南方大型社区队列的因果推断研究

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Science Bulletin 2024年第9期69卷 1313-1322页

作者：张昱勤陈世瑞韦晶姜杰林晓王莹郝春吴文静袁柱培孙洁王涵杜志成张王剑郝元涛 Department of Medical Statistics School of Public Health&Center for Health Information Research&Sun Yat-sen Global Health InstituteSun Yat-sen UniversityGuangzhou 510080China Department of Atmospheric and Oceanic Science Earth System Science Interdisciplinary CenterUniversity of MarylandCollege Park 20742USA Department of Epidemiology&Biostatistics School of Public HealthPeking UniversityBeijing 100191China Peking university Center for Public Health and Epidemic Preparedness&Response Peking UniversityBeijing 100191China key laboratory of Epidemiology of Major Diseases(Peking university) Ministry of EducationBeijing 100191China

Limited evidence exists on the effect of submicronic particulate matter(PM_(1)) on hypertension hospitalization. Evidence based on causal inference and large cohorts is even more scarce. In 2015, 36,271 participants were enrolled in South china and followed up through 2020. Each participant was assigned single-year, lag0–1, and lag0–2 moving average concentration of PM_(1)and fine inhalable particulate matter(PM2.5) simulated based on satellite data at a 1-km resolution. We used an inverse probability weighting approach to balance confounders and utilized a marginal structural Cox model to evaluate the underlying causal links between PM_(1)exposure and hypertension hospitalization, with PM2.5-hypertension association for comparison. Several sensitivity studies and the analyses of effect modification were also conducted. We found that a higher hospitalization risk from both overall(HR: 1.13, 95% CI:1.05–1.22) and essential hypertension(HR: 1.15, 95% CI: 1.06–1.25) was linked to each 1 μg/m3increase in the yearly average PM_(1)concentration. At lag0–1 and lag0–2, we observed a 17%–21% higher risk of hypertension associated with PM_(1). The effect of PM_(1)was 6%–11% higher compared with PM2.5. Linear concentration-exposure associations between PM_(1)exposure and hypertension were identified, without safety thresholds. Women and participants that engaged in physical exercise exhibited higher susceptibility, with 4%–22% greater risk than their counterparts. This large cohort study identified a detrimental relationship between chronic PM_(1)exposure and hypertension hospitalization, which was more pronounced compared with PM2.5and among certain groups.

关键词： PM_(1) Hypertension Causal inference Large cohort

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Screening of Brown Planthopper Resistant miRNAs in Rice and Their Roles in Regulation of Brown Planthopper Fecundity

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Rice science 2022年第6期29卷 559-568,I0031-I0033页

作者： LÜJun LIU Jinhui CHEN Lin sun Jiawei SU Qin LI Shihui YANG Jianhua ZHANG Wenqing State key laboratory of Biocontrol School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China

MicroRNAs(miRNAs)can participate in plant-insect interactions,which regulate plant defense *** this study,we analyzed the miRNA expression profiles of six rice varieties before and after brown planthopper(BPH)-*** identified 45 differentially expressed miRNAs between BPH-susceptible and BPH-resistant rice varieties and 144 miRNAs that responded to ***,miRNAs may be involved in multiple pathways regulating rice defense response against *** addition,we found that the genetic history of rice varieties determined the regulation mode of the miRNA and affected the amounts,types,changing trends and response periods of miRNAs in response to *** conclude,we scanned seven potential cross-kingdom miRNAs,of which miR5795 may target the vitellogenin gene in BPH,causing a 16.07%reduction in BPH *** results provide new miRNA information of rice-BPH interactions and BPH-resistant rice variety breeding.

关键词： Nilaparvata lugens insect-resistant rice miR5795 fecundity

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Litterfall seasonality and adaptive strategies of tropical and subtropical evergreen forests in china

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Journal of Plant Ecology 2022年第2期15卷 320-334页

作者： Yuhang Dai Fanxi Gong Xueqin Yang Xiuzhi Chen Yongxian Su Liyang Liu Jianping Wu Xiaodong Liu Qingling sun College of Forestry and Landscape Architecture South China Agricultural UniversityGuangzhou 510630China guangdong province key laboratory for Climate Change and Natural Disaster Studies School of Atmospheric SciencesSun Yat-sen University&Southern Marine Science and Engineering Guangdong LaboratoryZhuhai 519082China College of Earth Sciences Chengdu University of TechnologyChengdu 610000China key Lab of guangdong for Utilization of Remote sensing and Geographical information System Guangdong Open Laboratory of Geospatial Information Technology and ApplicationGuangzhou Institute of GeographyGuangdong Academy of SciencesGuangzhou 510070China

Tropical and subtropical evergreen broad-leaved forests(EBFs)and needle-leaved forests(ENFs)in china exhibit complex leaf shedding strategies in responses to soil water availability,vapor pressure deficits(VPDs)and sunlight ***,the seasonal variations and triggers of litterfall differ significantly in tropical/subtropical forests,and there are still many ***,we aim to explore the distinct climatic factors of seasonal litterfall in a climate–phenology correlation *** collected seasonal litterfall data from 85 sites across tropical/subtropical china and used linear correlation coefficients between sunlight and rainfall to partition synchronous/asynchronous *** phase analysis and structural equation model analysis were conducted to model the climatic triggers of tropical *** indicated two types of tropical litterfall phenology under two types of *** synchronous climates,where seasonal sunlight and rainfall are positively correlated,the litterfall peak of the unimodal phenology and the first litterfall peak of the bimodal phenology both happen at the end of dry *** second litterfall peak of the bimodal phenology occurs at the end of rainy season due to water *** asynchronous climates,where seasonal sunlight and rainfall are negatively correlated,VPD shows consistent seasonal variations with incoming *** leaf senescence is accelerated at the end of dry season by higher VPD;while soil water deficit is in anti-phase with sunlight and mainly controls the second litterfall peak of the bimodal phenology in *** findings provide an important reference for modeling tropical phenology in Earth system models.

关键词： tropical/subtropical forests phenology leaf shedding strategy litterfall water stress rejuvenation

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Spatiotemporal Distribution and Epidemiological Characteristics of Hospital Admissions for Carbon Monoxide Poisoning in guangdong,china,2013-2020

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Biomedical and Environmental Sciences 2022年第10期35卷 943-953页

作者： XIAO Bin ZHANG You Miao ZHOU Jing XU Cheng Dong HU Wei WEN Wei CHEN Jia Bin sun Cheng Ye National Institute for Occupational Health and Poison Control Chinese Center for Disease Control and PreventionBeijing 100050China guangdong province Hospital for Occupational Disease Prevention and Treatment Guangdong Provincial Key Laboratory of Occupational Disease Prevention and TreatmentGuangzhou 510300GuangdongChina School of Public Health Sun Yat-sen UniversityGuangzhou 510030GuangdongChina State key laboratory of Resources and Environmental information System Institute of Geographic Science and Natural Resource ResearchChinese Academy of SciencesBeijing 100101China university of Chinese Academy of Sciences Beijing 100101China Commission Affairs Center of Health Commission of guangdong province Guangzhou 510060GuangdongChina

Objective This study aimed to determine the spatiotemporal distribution and epidemiological characteristics of hospital admissions for carbon monoxide poisoning(COP)in guangdong,china,from 2013 to *** Data on age-and sex-specific numbers of hospital admissions due to COP in guangdong(2013-2020)were *** temperatures were downloaded through the china Meteorological Data Sharing Service *** analyzed temporal trends through time series decomposition and used spatial autocorrelation analysis to detect spatial *** distributed lag nonlinear model was used to quantify the effects of *** There were 48,854 COP admissions over the study *** sex ratio(male to female)was1:*** concentration ratios(M)ranged from *** highest risk occurred in January(season index=3.59).Most cases were concentrated in the northern mountainous areas of guangdong with high-high *** in the study region showed significant spatial autocorrelation,and the global Moran’s I value of average annual hospital admission rates for COP was 0.447(P2℃)]on COP were 2.24-3.81,as compared with the reference temperature[median(24℃)].Conclusion COP in guangdong province showed significant temporal and spatial *** temperature was associated with a high risk of COP,and the influence had a lag lasting 7 days.

关键词： Carbon monoxide poisoning Hospitalization Distributed lag nonlinear model Spatialtemporal model

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基于水资源需求场理论的需水驱动力影响分析

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水科学进展 2018年第3期29卷 357-364页

作者：陈晓宏王佳雯何艳虎杨冰杨杰中山大学水资源与环境研究中心广东广州510275 广东省华南地区水安全调控工程技术研究中心广东广州510275 华南地区水循环与水安全广东普通高校重点实验室广东广州510275

为了解决传统水资源需求驱动因素分析中存在难以直观反映城市空间相互作用的问题,运用水资源需求场理论,分析地区水资源需求空间特征;结合社会经济势能探讨水资源需求的驱动因素,并以2014年广东省用水、社会经济数据为例进行计算与分析... 详细信息

为了解决传统水资源需求驱动因素分析中存在难以直观反映城市空间相互作用的问题,运用水资源需求场理论,分析地区水资源需求空间特征;结合社会经济势能探讨水资源需求的驱动因素,并以2014年广东省用水、社会经济数据为例进行计算与分析。研究表明:(1)广东省水资源需求场呈现以珠三角地区为中心向外辐射的分布特征,各城市周围的场强方向指向各城市中心点;(2)水资源需求场的叠加会改变城市的场强大小与方向;(3)社会经济势能与水资源需求场相关系数达0.924。结果证实,社会经济是水资源需求的主要驱动力;在其驱动下,水资源在空间上向发达地区与城市中心流动。该结果可为水资源需求的准确预测、水资源管理提供基础支撑。

关键词：水资源需求场需水驱动力水荷社会经济势能

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