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Improving sentiment analysis accuracy with emoji embedding

Journal of Safety Science and Resilience 2021年第4期2卷 246-252页

作者： chuchu Liu Fan Fang Xu Lin Tie Cai Xu Tan Jianguo liu Xin Lu College of Systems Engineering National University of Defense TechnologyChangsha410073China College of Computer National University of Defense TechnologyChangsha410073China School of Software Engineering Shenzhen Institute of Information TechnologyShenzhen518172China Institute of Accounting and Finance Shanghai University of Finance and EconomicsShanghai200433China

Due to the diversity and variability of Chinese syntax and semantics,accurately identifying and distinguishing individual emotions from online texts is challenging.To overcome this limitation,we incorporate a new source of individual sentiment,emojis,which contain thousands of graphic symbols and are increasingly being used for expressing emotion in online conversations.We examined popular sentiment analysis algorithms,including rule-based and classification algorithms,to evaluate the impact of supplementing emojis as additional features to improve the algorithm performance.Emojis were also translated into corresponding sentiment words when con-structing features for comparison with those directly generated from emoji label words.In addition,considering different functions of emojis in texts,we classified all posts in the dataset by their emoji usage and examined the changes in algorithm performance.We found that emojis are effective as expanding features for improving the accuracy of sentiment analysis algorithms,and the algorithm performance can be further increased by taking different emoji usages into consideration.In this study,we developed an improved emoji-embedding model based on Bi-LSTM(namely,CEmo-LSTM),which achieves the highest accuracy(around 0.95)when analyzing online Chinese texts.We applied the CEmo-LSTM algorithm to a large dataset collected from Weibo from December 1,2019 to March 20,2020 to understand the sentiment evolution of online users during the COVID-19 pandemic.We found that the pandemic remarkably impacted individual sentiments and caused more passive emotions(e.g.,horror and sadness).Our novel emoji-embedding algorithm creatively combined emojis as well as emoji usage with the sentiment analysis model and can handle emotion mining tasks more effectively and efficiently.

关键词： Sentiment analysis Emoji CEmo-LSTM Sentiment evolution COVID-19

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Genetic mutations and molecular mechanisms of Fuchs endothelial corneal dystrophy

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Eye and Vision 2021年第1期8卷 232-243页

作者： Xuerui liu Tao Zheng chuchu Zhao Yi Zhang Hanruo liu Liyuan Wang Ping liu Department of Ophthalmology The First Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiangChina The Beijing Institute of Ophthalmology Beijing Tongren HospitalCapital Medical UniversityBeijingChina

Background:Fuchs endothelial corneal dystrophy is a hereditary disease and the most frequent cause of corneal transplantation in the worldwide.Its main clinical signs are an accelerated decrease in the number of endothelial cells,thickening of Descemet’s membrane and formation of guttae in the extracellular matrix.The cornea’s ability to maintain stromal dehydration is impaired,causing painful epithelial bullae and loss of vision at the point when the amount of corneal endothelial cells cannot be compensated.At present,apart from corneal transplantation,there is no other effective treatment that prevents blindness.Main text:In this review,we first summarized the mutations of COL8A2,TCF4,TCF8,SLC4A11 and AGBL1 genes in Fuchs endothelial corneal dystrophy.The molecular mechanisms associated with Fuchs endothelial corneal dystrophy,such as endoplasmic reticulum stress and unfolded protein response pathway,oxidative stress,mitochondrial dysregulation pathway,apoptosis pathway,mitophagy,epithelial-mesenchymal transition pathway,RNA toxicity and repeat-associated non-ATG translation,and other pathogenesis,were then explored.Finally,we discussed several potential treatments related to the pathogenesis of Fuchs endothelial corneal dystrophy,which may be the focus of future research.Conclusions:The pathogenesis of Fuchs endothelial corneal dystrophy is very complicated.Currently,corneal transplantation is an important method in the treatment of Fuchs endothelial corneal dystrophy.It is necessary to continuously explore the pathogenesis of Fuchs endothelial corneal dystrophy and establish the scientific foundations for the development of next-generation corneal therapeutics.

关键词： Fuchs endothelial corneal dystrophy Genetic mutations Mechanisms Therapy

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Tailored boron phosphate monolithic foam with multimodal hierarchically porous structure and its applications

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Nano Research 2022年第7期15卷 6695-6704页

作者： Qiuwen liu Qiang liu Yawei Wu Renyou Zeng Fangshu Xing chuchu Cheng Huibin Qiu Caijin Huang State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350116China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China

The synthesis of multimodal hierarchically porous materials is of great challenge by facile approach.Herein,we assemble BPO_(4) hollow spheres into macroscopic foam materials with multimodal hierarchically porous structure by combining down-to-up process and Ostwald ripening effect.Tailored monolithic B_(2)O_(3)@BPO_(4) foams were obtained from a sticky hydrogel precursor by a one-step annealing process.The foam has the self-supporting frame of BPO_(4) hollow spheres with covering B_(2)O_(3) nanowires and shows excellent permeability and relatively high surface area due to hierarchical structure.The formation mechanism of monolithic B_(2)O_(3)@BPO_(4) foams mainly undergoes inflation,particle aggregation,and Ostwald ripening process.Monolithic foams exhibit superior catalytic activity in oxidation dehydrogenation of alkanes due to the sufficient exposure of active sites over the special frame structure.Furthermore,various monolithic functionalized BPO_(4) foam composites can be easily synthesized and exhibit superior performance in different applications including the oxidation of carbon monoxide,and the self-driven removal of organic pollutants.More interestingly,we also found the sticky hydrogel precursor possesses good heat shielding effect.This work provides a new insight for constructing multimodal hierarchically porous materials with the remaining superior property of nanoscale to cope with various challenges.

关键词： multimodal hierarchically porous materials tailored monolithic foam sticky hydrogel self-supporting hollow spheres

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Micro/nanoelectrode-based electrochemical methodology for single cell and organelle analysis

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Nano Research 2024年第1期17卷 196-206页

作者： chuchu Xu De Yang Yuchan Wang Ruolin liu Fan Wang Zhongqun Tian Keke Hu Department of Chemistry College of Chemistry&Chemical EngineeringXiamen UniversityXiamen 361005China

Cells are the basic unit of life.Electrochemical analysis of single cells/organelles is essential for uncovering the molecular mechanisms of physiological and pathological processes that are difficult to elucidate on a larger scale.This paper provides an overview of the commonly used fabrication methods for micro/nanoelectrodes applied in the investigations of single cells/organelles as well as the corresponding electrochemical measurements over the last four years including extracellular measurement,combination of extra and intracellular measurement,intracellular reactive oxygen species and reactive nitrogen species(ROS/RNS)measurement,and isolated organelles measurement.

关键词： single cell/organelle micro/nanoelectrode electrochemical measurement chemical transmitters

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Targeted delivery of hyaluronic acid nanomicelles to hepatic stellate cells in hepatic fibrosis rats

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Acta Pharmaceutica Sinica B 2020年第4期10卷 693-710页

作者： Wenhao Li chuchu Zhou Yao Fu Tijia Chen Xing liu Zhirong Zhang Tao Gong Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610064China

Hepatic fibrosis is one kind of liver diseases with a high mortality rate and incidence.The activation and proliferation of hepatic stellate cells(HSCs)is the most fundamental reason of hepatic fibrosis.There are no specific and effective drug delivery carriers for the treatment of hepatic fibrosis at present.We found that when hepatic fibrosis occurs,the expression of CD44 receptors on the surface of HSCs is significantly increased.Based on this finding,we designed silibinin-loaded hyaluronic acid(SLB-HA)micelles to achieve the treatment of hepatic fibrosis.Meanwhile,we constructed liver fibrosis rat model using Sprague-Dawley rats.We demonstrated that HA micelles had specific uptake to HSCs in vitro while avoiding the distribution in normal liver cells and the phagocytosis of macrophages.Importantly,HA micelles showed a significant liver targeting effect in vivo,especially in fibrotic liver which highly expressed CD44 receptors.In addition,SLB-HA micelles could selectively kill activated HSCs,having an excellent anti-hepatic fibrosis effect in vivo and a significant sustained release effect,and also had a good biological safety and biocompatibility.Overall,HA micelles represented a novel nanomicelle system which showed great potentiality in anti-hepatic fibrosis drugs delivery.

关键词： Nanomicelles Hyaluronic acid Hepatic stellate cells Hepatic fibrosis Silibinin

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Exploration of the mechanism of cavitation vortex rope and vortex development in the draft tube of tubular turbine units

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 163-171,F0002页

作者： Chuang Cheng Zhenggui Li Changrong Shen Shenglong Gu chuchu Zeng Chuanzheng Bai Meng liu Junfeng Hu Qinghai University of Science and Technology Xining 810000China Key Laboratory of Fluid and Power Machinery Ministry of Education(Xihua University)Chengdu 610039China South-to-North Water Diversion East Jiangsu Water Source Co. Ltd.Nanjing 210029China School of civil engineering and water resources Qinghai UniversityXining 810016China Dongyuan Branch of Shenzhen Water Planning and Design Institute Co. Ltd.Changsha 410000China

Draft tube vortex rope is considered a special cavitation flow phenomenon in tubular turbine units.Cavitation vortex rope is one of the most detrimental factors affecting the safety of hydraulic turbines.In this study,ANSYS CFX software was utilized to numerically simulate the internal cavitation flow of a hydraulic turbine draft tube.The evolution of the cavitation vortex core was characterized by vortex line distribution and vorticity transport equation.The shape and number of blades influenced the revolving direction and distribution characteristics of the vortex close to the runner cone,which formed a counterclockwise-clockwise-counterclockwise distribution pattern.Simultaneously,there were many secondary flows in the draft tube.Mutual cancellation and dissipation between the flows was one of the reasons for reduction in vorticity.When the cross-sectional shape of the draft tube was changed,the vorticity was distributed from the center of the vortex rope to all parts of the cross-sectional draft tube,with extreme values at the center and at the walls.The vortex stretching and dilatation terms played a major role in the change in vorticity,with the baroclinic torque having an effect at the center of the vortex rope,this study is helpful to understand the flow of water in the draft tube and guide the design and optimization of the draft tube in engineering application.

关键词： cavitation vortex rope vorticity transport equation vortex line draft tube

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A Novel Feature-based Method for Sentiment Analysis of Chinese Product Reviews

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China Communications 2014年第3期11卷 154-164页

作者： liu Lizhen SONG Wei WANG Hanshi LI chuchu LU Jingli Information and Engineering College Capital Normal University Beijing 100048 P. R. China Agresearch Ltd New Zealand

Sentiment analysis of online reviews and other user generated content is an important research problem for its wide range of applications.In this paper,we propose a feature-based vector model and a novel weighting algorithm for sentiment analysis of Chinese product reviews.Specifically,an opinionated document is modeled by a set of feature-based vectors and corresponding weights.Different from previous work,our model considers modifying relationships between words and contains rich sentiment strength descriptions which are represented by adverbs of degree and punctuations.Dependency parsing is applied to construct the feature vectors.A novel feature weighting algorithm is proposed for supervised sentiment classification based on rich sentiment strength related information.The experimental results demonstrate the effectiveness of the proposed method compared with a state of the art method using term level weighting algorithms.

关键词：基于特征情感评论商品中国加权算法向量模型特征向量

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NIR-II driven plasmon-enhanced cascade reaction for tumor microenvironment-regulated catalytic therapy based on bio-breakable Au-Ag nanozyme

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Nano Research 2020年第8期13卷 2118-2129页

作者： Min Xu Qianglan Lu Yiling Song Lifang Yang chuchu Ren Wen Li Ping liu Yule Wang Yan Zhu Nan Li Tianjin Key Laboratory of Drug Delivery&High-Efficiency School of Pharmaceutical Science and TechnologyTianjin UniversityTianjin300072China Tianjin State Key Laboratory of Modern Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin301617China Research and Development Center of TCM Tianjin International Joint Academy of Biotechnology and MedicineTianjin300457China

Emerging nanozymes with natural enzyme-mimicking catalytic activities have inspired extensive research interests due to their high stability,low cost,and simple preparation,especially in the field of catalytic tumor therapy.Here,bio-breakable nanozymes based on glucose-oxidase(GOx)-loaded biomimetic Au–Ag hollow nanotriangles(Au–Ag–GOx HTNs)are designed,and they trigger an near-infrared(NIR)-II-driven plasmon-enhanced cascade catalytic reaction through regulating tumor microenvironment(TME)for highly efficient tumor therapy.Firstly,GOx can effectively trigger the generation of gluconic acid(H+)and hydrogen peroxide(H2O2),thus depleting nutrients in the tumor cells as well as modifying TME to provide conditions for subsequent peroxidase(POD)-like activity.Secondly,NIR-II induced surface plasmon resonance can induce hot electrons to enhance the catalytic activity of Au–Ag–GOx HTNs,eventually boosting the generation of hydroxyl radicals(•OH).Interestingly,the generated H2O2 and H+can simultaneously induce the degradation of Ag nanoprisms to break the intact triangle nanostructure,thus promoting the excretion of Au–Ag–GOx HTNs to avoid the potential risks of drug metabolism.Overall,the NIR-II driven plasmon-enhanced catalytic mechanism of this bio-breakable nanozyme provides a promising approach for the development of nanozymes in tumor therapy.

关键词： near-infrared(NIR)-II driven plasmon-enhanced catalysis Au-Ag hollow nan otria ngles bio-breakable cascade reaction

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Exploring the anti-aging effects of chlorogenic acid and the underlying mechanisms based on a Caenorhabditis elegans model

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Journal of Traditional Chinese Medical Sciences 2023年第2期10卷 208-217页

作者： Yuqian Yang Xu Chen Danyang Ye Chuanyu Wei Xinxin Pang chuchu Kong Yongsheng Fang Hongliu Yang Yuanyuan Zhang Yonggang liu School of Chinese Materia Madica Beijing University of Chinese MedicineBeijing102488China Krannert Institute of Cardiology Indiana UniversityBurmingtonIndiana46517USA

Objective:To explore the anti-aging effects of chlorogenic acid(CGA)and the underlying mechanisms based on a Caenorhabditis elegans(C.elegans)model.Methods:The anti-agingactivityofCGAwasstudied basedon thebodylength,exercisebehavior,lipofuscin content,antioxidative stress ability,swallowing frequency,body-bending frequency,and head-swinging ability of C.elegans.Through DAF-16 nuclear translocation and SOD-3-GFP fluorescence experiments,the effects of CGA on ROS levels,antioxidant enzyme activities,MDA content,mutant-strain lifespan,and anti-aging molecular signaling pathways were explored,as well as the underlying mechanisms.Results:CGA improved multiple indices of the nematode:body length was increased(all P<0.001),head-swing frequency and body-bending frequency were increased(all P<0.05),nematode longevity was prolonged(P=0.0021),lipofuscin deposition in nematodes was slowed down(all P<0.001),the chemotaxis index was improved(P=0.0012),ROS levels were reduced(all P<.001),and SOD activity and MDA content were reduced(SOD:P=0.0017 between the low-concentration group and the control group,P<.001 between the high-concentration and medium-concentration groups and the control group;MDA:P=0.0135 between the low-concentration group and the control group,and P<0.001 between the high-concentration and medium-concentration groups and the control group).In addition,CGA also activated the DAF-16 transcription factor,promoted DAF-16 nuclear translocation under oxidative stress conditions(both P<0.001 between the high-concentration and medium-concentration groups and the control group),and increased SOD-3 gene expression in nematodes(all P<0.001).Conclusion:CGA plays an anti-aging role in C.elegans.The underlying mechanisms include activation of the insulin/IGF-1 signaling pathway and enhancement of DAF-16 activity.This study lays a foundation for further research into the anti-aging effects of CGA.

关键词： Chlorogenic acid Caenorhabditis elegans Antioxidant activity Anti-aging DAF-16

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几种多孔电极材料镓电沉积性能的研究

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过程工程学报 2023年第1期23卷 136-143页

作者：刘玲蔡楚楚董彬欣安徽工业大学能源与环境学院安徽马鞍山243002

在工业上,稀散金属镓通常是从碱性溶液中电解提取得到的。在镓电解过程中,由于析氢副反应和传质速率低的原因导致镓电沉积的电流效率很低。本工作采用三维多孔电极电沉积镓,利用三维多孔电极发达的表面积促进镓电沉积过程,研究了不同电... 详细信息

在工业上,稀散金属镓通常是从碱性溶液中电解提取得到的。在镓电解过程中,由于析氢副反应和传质速率低的原因导致镓电沉积的电流效率很低。本工作采用三维多孔电极电沉积镓,利用三维多孔电极发达的表面积促进镓电沉积过程,研究了不同电极材料(泡沫金属和多孔碳)的析氢特性,结合不同电解温度和电流密度下各材料的镓电沉积行为,揭示三维多孔电极上镓电沉积的特性规律。结果表明,泡沫铜和石墨毡(GF)具有较低的析氢活性,但两种电极的镓电沉积性能差别很大。其中泡沫铜表现出最佳的镓电沉积性能,在温度为40℃、电流密度为0.1 A/cm^(2)条件下镓电沉积的电流效率(QE)达到22.5%,远高于铜片电极(10.7%);而相同条件下,GF电极的QE值仅为9.6%,低于铜片,这与电极表面的疏水性有关。具有较高析氢活性的泡沫铁、泡沫镍和网状玻璃碳(RVC)电极的镓电沉积过程受电解温度和电流密度的影响较大。在高电流密度下,泡沫铁电极表现出仅次于泡沫铜的QE值,在低电流密度下难以发生镓的电沉积;泡沫镍和RVC电极仅在低于镓熔点(20℃)的条件下发生镓的电沉积,在高于镓熔点(40℃)的条件下,由于电沉积的液态镓的活性较高,容易返溶,难以实现镓的析出。因此,电极材料的析氢活性对镓电沉积性能有较大影响,影响镓电沉积电流效率的关键因素还有电解温度、电流密度及电极表面的亲疏水性。

关键词：金属镓电沉积泡沫金属多孔碳电流效率

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