检索结果-南通市图书馆

Crab lice infestation in unilateral eyelashes and adjacent eyelids: A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第33期9卷 10323-10327页

作者： Wei Tang qian-qian li Department of Ophthalmology The Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityAffiliated Wuxi Clinical College of Nantong UniversityWuxi 214000Jiangsu ProvinceChina Intensive Care Unit The Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityAffiliated Wuxi Clinical College of Nantong UniversityWuxi 214000Jiangsu ProvinceChina

BACKGROUND Crab lice(Phthirus pubis)infestation can occur at any age,to either males or females,and across all regions of the ***,cases involving the eyelashes and adjacent eyelids(phthiriasis palpebrarum)are *** occurring as a sexually transmitted disease,crab lice can be spread by poor hygiene or in a dirty environment through direct contact with contaminated skin(hands)or textiles(towels and clothing).CASE SUMMARY A 50-year-old woman presented to our hospital with a 2-wk history of chronic eyelid pain and itching in the right eye,which exacerbated in the evening hours and which had not resolved following a 1-wk course of antibiotics and corticosteroid ointments(for blepharitis diagnosis from another hospital).A careful ophthalmic slit-lamp and light microscope examination revealed multiple crab lice and nits on the right upper eyelashes;the right and left lower eyelashes were *** the new diagnosis of phthiriasis palpebrarum,the patient was treated by removing the affected eyelashes,the crab lice,and their nits ***,the eyelids were washed once with povidone-iodine.A follow-up examination at 2 wk later showed complete resolution of symptoms and no evidence of *** This case emphasizes the importance of correct diagnosis and complete removal of eyelashes,crab lice and nits to cure phthiriasis palpebrarum.

关键词： Crab lice Infestation Unilateral eyelashes Phthiriasis palpebrarum Treatment Case report

Matched Field Source Localization via Environmental Focalization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2013年第2期30卷 147-150页

作者： li qian-qian li Zheng-lin ZHANG Ren-He State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190 Haikou Laboratory Institute of AcousticsChinese Academy of SciencesHaikou 570105 Graduate University of Chinese Academy of Sciences Beijing 100190

In a realistic application of matched field processing for source localization,the ability to localize an acoustic source is strongly affected by the uncertainty of the ***,accurate environment measurement is a difficult task in large regions of the *** employ a Bayesian approach,referred to here as focalization,to overcome the mismatch by including the environment in the parameter search *** maximizes the posterior probability density over the unknown source and environmental *** broadband signals recorded by a vertical line array in a Yellow Sea experiment are presented to demonstrate the feasibility of focalization.

关键词： parameters. space. overcome

Microstructure and microwave dielectric properties of ZnO-B_2O_3 added (Ca_(0.254)li_(0.19)Sm_(0.14))TiO_3 ceramics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2010年第3期29卷 243-247页

作者： LU Yin li Haitao li qian ZHANG Boping Department of Mechanical Engineering Henan Polytechnic Institute Nanyang 473009 China School of Materials Science and Engineering Henan University of Science and Technology Luoyang 471003 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The effects of ZnO-B2O3 （ZB2） on the sintering behavior and microwave dielectric properties of （Ca0.254li0.19Sm0.14）TiO3 ceramics were investigated. The densities of the specimens reached the maximum value by adding 3 wt.% ZB2 and then decreased. The sintering temperature of the specimens was lowered from 1300 to 1100℃ without degradation of the microwave dielectric properties. The （Ca0.254li0.19Sm0.14）TiO3＋ 3 wt.% ZB2 sintered at 1100℃ for 3 h showed good microwave dielectric properties, εr= 108.2, Qf= 6545 GHz, and rf= 6.5 ppm/℃, respectively, indicating that ZB2 was an effective sintering aid to improve the densification and microwave dielectric properties of （Ca0.254li0.19Sm0.14）TiO3 ceramics.

关键词： microwave dielectric properties densification ceramics sintering behavior

Modeling Microstructural Evolution under the Influence of Thermosolutal Convection during Ingot Solidification Process

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2003年第z1期19卷 20-22页

作者： qiang li Chunli Mo Dianzhong li Bainian qian Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A model combined both macroscopic transport and microstructural evolution is applied to describe the influence of thermosolutal convection on microstructural evolution during the solidification process. Firstly, the volume average method and Simpler algorithm are used to solve the macroscopic transport equation. Then the calculated results are incorporated into the cellular automaton (CA) model to simulate the microstructural evolution. Using this model, a simple casting ingot is applied to simulate microstructural evolution. Through the simulation, it is found that the thermosolutal convection has a strong influence on the redistribution of temperature field and solute field, which influence the solidification microstructural evolution.

关键词： Modeling, Thermosolutal convection, CA, Microstructural evolution

Icosahedral quasicrystal structure of the Mg_(40)Zn_(55)Nd_(5) phase and its thermodynamic stability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2022年第8期29卷 1543-1550页

作者： Shuai Zhang qianqian li Hongcan Chen Qun Luo qian li State Key Laboratory of Advanced Special Steels Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China Materials Genome Institute Shanghai UniversityShanghai 200444China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

The quasicrystal phase is beneficial to increasing the strength of magnesium ***,its complicated structure and unclear phase relations impede the design of alloys with good mechanical *** this paper,the Mg_(40)Zn_(55)Nd_(5) icosahedral quasicrystal(I-phase)structure is discovered in an as-cast Mg-58Zn-4Nd alloy by atomic resolution high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM).A cloud-like morphology is observed with Mg_(41.6)Zn_(55.0)Nd_(3.4) *** selected area electronic diffrac-tion(SAED)analysis shows that the icosahedral quasicrystal structure has 5-fold,4-fold,3-fold,and 2-fold symmetry zone *** thermo-dynamic stability of the icosahedral quasicrystal is investigated by differential scanning calorimetry(DSC)in the annealed *** an-nealed above 300℃,the Mg_(40)Zn_(55)Nd_(5) quasicrystal is found to decompose into a stable ternary phase Mg_(35)Zn_(60)Nd_(5),a binary phase MgZn,andα-Mg,suggesting that the quasicrystal is a metastable phase in the Mg-Zn-Nd system.

关键词： icosahedral quasicrystal crystal structure thermodynamic stability Mg-Zn-Nd alloys

DNA framework-engineered electrochemical biosensors

在线全文

学校读者我要写书评

暂无评论

Science China(life Sciences) 2020年第8期63卷 1130-1141页

作者： Fan li qian li Xiaolei Zuo Chunhai Fan Institute of Molecular Medicine Renji HospitalSchools of MedicineShanghai Jiao Tong UniversityShanghai 200127China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Self-assembled DNA nanostructures have shown remarkable potential in the engineering of biosensing interfaces,which can improve the performance of various *** particular,by exploiting the structural rigidity and programmability of the framework nucleic acids with high precision,molecular recognition on the electrochemical biosensing interface has been significantly enhanced,leading to the development of highly sensitive and specific biosensors for nucleic acids,small molecules,proteins,and *** this review,we summarize recent advances in DNA framework-engineered biosensing interfaces and the application of corresponding electrochemical biosensors.

关键词： framework nucleic acids biosensing interface electrochemical biosensors biomarkers DNA

ICS-SVM:A user retweet prediction method for hot topics based on improved SVM

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2022年第2期8卷 186-193页

作者： Tianji Dai Yunpeng Xiao Xia liang qian li Tun li School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China

In social networks,many complex factors affect the prediction of user forwarding *** paper proposes an improved SVM prediction method for user forwarding behavior of hot topics to improve prediction ***,we consider that the improved Cuckoo Search algorithm can select the optimal penalty parameters and kernel function parameters to optimize the SVM and thus predict the user's forwarding ***,this paper considers the factors that affect the user forwarding behavior comprehensively from the user's own factors and external ***,based on the characteristics of the user's forwarding behavior changing over time,the time-slicing method is used to predict the trend of hot *** show that the method can accurately predict the user's forwarding behavior and can sense the trend of hot topics.

关键词： Cuckoo search algorithm Support vector machine Hot topic User behavior prediction

Graphitic carbon nitride loaded with bismuth nanoparticles displays antibacterial photocatalytic activity

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第5期41卷 1570-1582页

作者： Hui Zhang ling li qian-qian li Tao Ma Jia-Qi Gao Jin-Bo Xue Shuang Gao Department of Plastic Surgery Second Hospital of Shanxi Medical UniversityTaiyuan 030001China Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyMinistry of EducationTaiyuan 030024China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany

Metal-free graphitic carbon nitride nanomaterials have been widely applied in the medical antibacterial field owing to their high anisotropy, excellent stability,satisfactory biocompatibility, and non-toxicity. Herein, Bi/C_(3)N_(4) nanocomposites were successfully constructed by hydrothermal method followed by loading bismuth on the surface of graphite carbon nitride. Bi nanospheres were tightly combined with the layered g-C_(3)N_(4) surface to promote effective separation of photo-induced charges, which results in the Bi/C_(3)N_(4) composite material that exhibited excellent photocatalytic activity under visible light. In addition, the surface plasmon resonance characteristics of semi-metal Bi further enhanced the visible-light absorption of the Bi/C_(3)N_(4). However, excessive Bi may inhibit the light-trapping ability of Bi/C_(3)N_(4).1.0% Bi/C_(3)N_(4) demonstrates excellent bactericidal efficiency as high as 96.4% against Escherichia coli(E. coli), which is attributed to the promotion of the production of reactive oxidative *** enhanced mechanism of Bi/C_(3)N_(4) synergistically achieving enhanced photocatalytic antibacterial activity under the coupling of multiple advantages was clarified,providing theoretical guidance for its application in the field of water disinfection and antibacterial treatment.

关键词： Carbon nitride Bi nanospheres Schottky barrier ROS Photocatalytic antibacterial

Fairness in machine learning: definition, testing,debugging, and application

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第9期67卷 41-61页

作者： Xuanqi GAO Chao SHEN Weipeng JIANG Chenhao liN qian li qian WANG Qi li Xiaohong GUAN Faculty of Electronic and Information Engineering Xi'an Jiaotong University School of Cyber Science and Engineering Wuhan University Institute for Network Sciences and Cyberspace Tsinghua University

In recent years, artificial intelligence technology has been widely used in many fields, such as computer vision, natural language processing and autonomous driving. Machine learning algorithms, as the core technique of AI, have significantly facilitated people's lives. However, underlying fairness issues in machine learning systems can pose risks to individual fairness and social security. Studying fairness definitions, sources of problems, and testing and debugging methods of fairness can help ensure the fairness of machine learning systems and promote the wide application of artificial intelligence technology in various fields. This paper introduces relevant definitions of machine learning fairness and analyzes the sources of fairness problems. Besides, it provides guidance on fairness testing and debugging methods and summarizes popular datasets. This paper also discusses the technical advancements in machine learning fairness and highlights future challenges in this area.

关键词： artificial intelligence security machine learning security machine learning fairness model testing model debugging