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Classifying Misinformation of User Credibility in Social Media Using Supervised Learning

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Computers, Materials & Continua 2023年第5期75卷 2921-2938页

作者： Muhammad Asfand-e-Yar Qadeer Hashir Syed Hassan Tanvir Wajeeha Khalil Department of Computer science Center of Excellence in Artificial Intelligence(CoE-AI)Bahria UniversityIslamabad44000Pakistan Department of Computer science and Information Technology University of Engineering and TechnologyPeshawar25000Pakistan

The growth of the internet and technology has had a significant effect on social *** information has become an important research topic due to the massive amount of misinformed content on social *** is very easy for any user to spread misinformation through the ***,misinformation is a problem for professionals,organizers,and ***,it is essential to observe the credibility and validity of the News articles being shared on social *** core challenge is to distinguish the difference between accurate and false *** studies focus on News article content,such as News titles and descriptions,which has limited their ***,there are two ordinarily agreed-upon features of misinformation:first,the title and text of an article,and second,the user *** the case of the News context,we extracted different user engagements with articles,for example,tweets,i.e.,read-only,user retweets,likes,and *** calculate user credibility and combine it with article content with the user’s *** combining both features,we used three Natural language processing(NLP)feature extraction techniques,i.e.,Term Frequency-Inverse Document Frequency(TF-IDF),Count-Vectorizer(CV),and Hashing-Vectorizer(HV).Then,we applied different machine learning classifiers to classify misinformation as real or ***,we used a Support Vector Machine(SVM),Naive Byes(NB),Random Forest(RF),Decision Tree(DT),Gradient Boosting(GB),and K-Nearest Neighbors(KNN).The proposed method has been tested on a real-world dataset,i.e.,“fakenewsnet”.We refine the fakenewsnet dataset repository according to our required *** dataset contains 23000+articles with millions of user *** highest accuracy score is 93.4%.The proposed model achieves its highest accuracy using count vector features and a random forest *** discoveries confirmed that the proposed classifier would effectively classify misinformat

关键词： Misinformation user credibility fake news machine learning

Development of an indirect competitive ELISA for simultaneous detection of enrofloxacin and ciprofloxacin

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2011年第11期12卷 884-891页

作者： Hai-tang ZHANG Jin-qing JIANG Zi-liang WANG Xin-yao CHANG Xing-you LIU San-hu WANG Kun ZHAO Jin-shan CHEN College of Animal science Henan Institute of Science and Technology Xinxiang 453003 China Henan Higher Education engineering Technology Research center for Animal Diseases Control and Residues Supervision Xinxiang 453003 China

Modified 1-ethyl-3-(3-dimethylaminopropy) carbodiimide(EDC) method was employed to synthesize the artificial antigen of enrofloxacin(ENR),and New Zealand rabbits were used to produce anti-ENR polyclonal antibody(pAb).Based on the checkerboard titration,an indirect competitive enzyme-linked immunosorbent assay(ELISA) standard curve was *** assay was sensitive and had a linear range from 0.6 to 148.0 μg/kg(R2=0.9567),with the half maximal inhibitory concentration(IC50) and limit of detection(LOD) values of 9.4 μg/kg and 0.2 μg/kg,*** all the competitive analogues,the produced pAb exhibited a high cross-reactivity to ciprofloxacin(CIP)(87%),the main metabolite of ENR in *** optimization,the matrix effects can be ignored using a 10-fold dilution in beef and 20-fold dilution in *** overall recoveries and coefficients of variation(CVs) were in the ranges of 86%-109% and 6.8%-13.1%,*** can be concluded that the established ELISA method is suitable for simultaneous detection of ENR and CIP in animal tissues.

关键词： Enrofloxacin Ciprofloxacin Indirect competitive ELISA Animal tissues

Virtual 5G Network Embedding in a Heterogeneous and Multi-Domain Network Infrastructure

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China Communications 2016年第10期13卷 29-43页

作者： Cunqian Yu Weigang Hou Yingying Guan Yue Zong Pengxing Guo School of Computer science and engineering Northeastern University

The pursuit of the higher performance mobile communications forces the emergence of the fifth generation mobile communication(5G). 5G network, integrating wireless and wired domain, can be qualified for the complex virtual network work oriented to the cross-domain requirement. In this paper, we focus on the multi-domain virtual network embedding in a heterogeneous 5G network infrastructure, which facilitates the resource sharing for diverse-function demands from fixed/mobile end users. We proposed the mathematical ILP model for this *** based on the layered-substrate-resource auxiliary graph and an effective six-quadrant service-type-judgment method, 5G embedding demands can be classified accurately to match different user access densities. A collection of novel heuristic algorithms of virtual 5G network embedding are proposed. A great deal of numerical simulation results testified that our algorithm performed better in terms of average blocking rate, routing latency and wireless/wired resource utilization, compared with the benchmark.

关键词： 5G virtual network embedding heterogeneous and multi-domain infrastructure wireless channel capacity data center

Growth and Characterization of a Kind of Nitrogen-Rich Niobium Nitride for Bolometer Applications at Terahertz Frequencies

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Chinese Physics Letters 2008年第11期25卷 4076-4078页

作者：鲁学会康琳周雷陈健吉争鸣曹春海金飚兵许伟伟吴培亨王晓书 Research Institute of Superconductor Electronics (RISE) Department of Electronic Science and Engineering Nanjing University Nanjing 210093 center for Materials Analysis Nanjing University Nanjing 210093

Niobium is sputtered onto a single crystalline silicon substrate in N2：Ar=4：1 gas mixture at the total pressure of 2 Pa. The temperature coefficient of resistance of the sample is about 0.5% at 30OK, and up to 7% at 77K, indicating the possibility of using it to make room-temperature bolometers with performances better than those based on Pt, Bi, or Nb. For a 60-nm-thick sample, the rms surface roughness is 0.45nm over an area of 2 μm × 2 μm. Analyses based on x-ray diffraction and x-ray photoelectronic spectroscopy indicate that the samples are Nb5N6 thin films in which there is a combination of Nb^3＋ and Nb^5＋, or Nb^4＋.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Preparation of specialists in mining surveying work in Mongolia and direction of its change in new economic situation

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中国有色金属学会会刊：英文版 2005年第S1期15卷 272-274页

作者： D. Dondov C. Altantsetseg School of Mining engineering Mongolian State University of Science and Technology MongoliaSchool of Mining Engineering Mongolian State University of Science and Technology Mongolia

Due to the rapid growth of the mining sector of Mongolia, the need for preparing mining surveying specialists is increasing significantly. The history of preparing highly educated mining surveying specialists and putting their education into practice in our country is an interesting one. The main center to prepare mining surveying specialists is the School of Mining engineering of the Mongolian State University of science and Technology. This paper introduces the work that is being done today to prepare mining surveying specialists in Mongolia and its future purposes.

关键词： mining surveying mapping high education training research scientific work new environment future prospect

Degradable nanocatalyst enables antitumor/antibacterial therapy and promotion of wound healing for diabetes via self-enhanced cascading reaction

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Chinese Chemical Letters 2023年第7期34卷 155-161页

作者： Xiang Wang Cheng Ding Ziwen Zhang Chunlin Li Dongmiao Cao Linjing Zhao Guoying Deng Yu Luo Chunping Yuan Jie Lu Xijian Liu School of Chemistry and Chemical engineering Shanghai Engineering Technology Research Center for Pharmaceutical Intelligent EquipmentShanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNAInstitute for Frontier Medical TechnologyShanghai University of Engineering ScienceShanghai201620China Affiliated Sixth People's Hospital Shanghai JiaoTong UniversityShanghai 200233China Trauma center Shanghai General HospitalShanghai Jiaotong University School of MedicineShanghai 201620China

Diabetic patients often have problems such as residual tumor and wound infection after tumor resection,causing severe clinical *** is urgent to develop effective therapies to reach oncotherapy/antiinfection/promotion of wound healing combined ***,we propose CS/MnO_(2)-GO_x (CMGO_x)nanocatalysts for the specific catalytic generation of ~·OH to inhibit tumors and bacteria in a hyperglycemic *** good biocompatible chitosan (CS),as a carrier for the catalyst,exhibits excellent antibacterial effect as well as promotes wound *** oxidase (GO_x) is loaded on the surface of CS nanoparticles to generate H_(2)O_(2) and gluconic acid by consuming glucose (starvation therapy,ST) and O_(2).The MnO_(2) depletes glutathione (GSH) to produce Mn^(2+),amplifying oxidative stress and further promoting the activity of Mn^(2+)-mediated Fenton-like reaction to produce~·OH (chemodynamic therapy,CDT)in weak acidic ***,the produced gluconic acid lowers the p H of the environment,enhancing chemodynamic therapy (ECDT).The tumor cells and bacteria are efficiently eliminated by the synergistic effect of ST and *** MnO_(2) nanoparticles at neutral environment decomposes H_(2)O_(2) into O_(2),which cooperate with CS to promote *** self-enhanced cascade reaction of CMGO_x in situ exhibits excellent effects of antitumor/antibacterial therapy and promotion of wound healing,offering a promising integrated treatment for diabetic patients after tumor surgical resection.

关键词： Self-cascade reaction Starvation therapy Chemodynamic therapy Antitumor Antibacterial Wound healing

Effects of Vacuum on Fused Silica UV Damage

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Chinese Physics Letters 2008年第1期25卷 223-226页

作者：徐世珍吕海兵袁晓东黄进蒋晓东王海军祖小涛郑万国 Department of Applied Physics University of Electronic Science and Technology of China Chengdu 610054 Research center of Laser Fusion China Academy of Engineering Physics Mianyang 621900

Damage points induced by 355 nm laser irradiation increase more quickly on the surface of fused silica in vacuum of about 10^-3 Pa than in atmospheric air at the same fluence. The larger concentration of point defects in vacuum is confirmed by photoluminescence intensity. X-ray photoelectron spectroscopy and infrared absorption indicate the formation of sub-stoichiometric silica on the surface. The degradation mechanism of fused silica in vacuum is discussed.

关键词： SI-RICH SIO2-FILMS LASER-PULSES ELECTRONIC EXCITATION DEFECT GENERATION AMORPHOUS SIO2 355 NM LUMINESCENCE PHOTOLUMINESCENCE MICROSTRUCTURE IRRADIATION

Tandem catalysis in electrochemical CO_(2) reduction reaction

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Nano Research 2021年第12期14卷 4471-4486页

作者： Yating Zhu Xiaoya Cui Huiling Liu Zhenguo Guo Yanfeng Dang Zhanxi Fan Zhicheng Zhang Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin300072China Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin Key Laboratory of Advanced Functional Porous MaterialsTianjin University of TechnologyTianjin300384China center for Programmable Materials School of Materials Science and EngineeringNanyang Technological University50 Nanyang AvenueSingapore639798Singapore School of Chemistry and Chemical engineering Hefei University of TechnologyHefei230009China Department of Chemistry City University of Hong KongHong KongChina Hong Kong Branch of National Precious Metals Material engineering Research center(NPMM) City University of Hong KongHong KongChina

Electrochemical CO_(2) reduction reaction(CO_(2)RR)is an attractive pathway for closing the anthropogenic carbon cycle and storing intermittent renewable energy by converting CO_(2) to valuable chemicals and *** production of highly reduced carbon compounds beyond CO and formate,such as hydrocarbon and oxygenate products with higher energy density,is particularly desirable for practical ***,the productivity towards highly reduced chemicals is typically limited by high overpotential and poor selectivity due to the multiple electron-proton transfer *** catalysis,which is extensively utilized by nature for producing biological macromolecules with multiple enzymes via coupled reaction steps,represents a promising strategy for enhancing the CO_(2)RR *** the efficiency of CO_(2)RR via tandem catalysis has recently emerged as an exciting research frontier and achieved significant *** we describe the general principles and also considerations for designing tandem catalysis for CO_(2)*** advances in constructing tandem catalysts,mainly including bimetallic alloy nanostructures,bimetallic heterostructures,bimetallic core-shell nanostructures,bimetallic mixture catalysts,metal-metal organic framework(MOF)and metal-metallic complexes,metal-nonmetal hybrid nanomaterials and copper-free hybrid nanomaterials for boosting the CO_(2)RR performance are systematically *** study of tandem catalysis for CO_(2)RR is still at the early stage,and future research challenges and opportunities are also discussed.

关键词： CO_(2)reduction electrocatalysis tandem spillover value-added chemicals

Kinetics of magnesium preparation by vacuum-assisted carbothermic reduction method

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Rare Metals 2016年第2期35卷 192-197页

作者： Wei-dong Xie Jie Chen Hao Wang Xi Zhang Xiao-dong Peng Yan Yang School of Materials science and engineering Chongqing University National engineering Research center for Magnesium Alloys Chongqing University Bai He Tan Project Department Yangtze Three Gorges Technology & Economy Development Co. Ltd

Metallic magnesium was prepared by vacuumassisted carbothermic reduction method, and its morphologies were observed and analyzed. The reduction ratios of reactions were carried out under various vacuums, reaction temperatures, and time. Reaction kinetics of carbothermic reduction process was investigated. The results reveal that the morphologies of metallic magnesium sample that crystallized in the bottom and top sections of the condensation cap appear as the shape of feather with close-packing needle structure and the shape of schistose with metal luster,compactly clumpy structure, respectively. The reduction ratio of reaction process can be facilitated through reducing vacuum, increasing temperature, lengthening time, or their combinations and can reach up to 83.7 % under the condition of 10 Pa and 1573 K with 60 min reaction time. At1423-1573 K, the reaction rate constant k of carbothermic reduction of magnesia in vacuum gets greater with the increase of temperature. The reaction activity energy is190.28, 219.71 and 451.12-528.54 k J mol-1when the procedure of carbon gasification reaction, interfacial reaction, or gaseous diffusion is the reaction rate-determining step at 1423-1573 K, respectively. The gaseous diffusion procedure has the largest activity energy value and is,therefore, the main reaction rate-determining step.

关键词： Magnesium Carbothermic reduction Magnesia Vacuum Kinetics