检索结果-南通市图书馆

On the Conditions of a Center and General Integrals of Quadratic Differential Systems

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2001年第2期17卷 229-236页

作者： Wei Yin YE department of mathematics. nanjing normal university. nanjing 210097, p. r. china yan Qian YE department of mathematics. nanjing university, nanjing 210093, p. r. china department of mathematics Nanjing Normal University Nanjing 210097 P. R. China department of mathematics Nanjing University Nanjing 210093 P. R. China

We give the general integral of quadratic differential system with center in two cases under the Chinese classification.

关键词： Quadratic differential system Center General integral

Uniqueness theorem for algebraic curves on compact riemann surfaces

在线全文

学校读者我要写书评

暂无评论

Science china mathematics 2007年第5期50卷 683-688页

作者： yan xu & Min rU department of mathematics, nanjing normal university, nanjing 210097, china department of mathematics, university of Houston, Houston, TX 77401, USA 1. department of mathematics Nanjing Normal University Nanjing 210097 China 2. department of mathematics University of Houston Houston TX 77401 USA

In this paper, we prove a uniqueness theorem for algebraic curves from a compact riemann surface into complex projective spaces.

关键词： uniqueness theorem algebraic curves riemann surfaces Nevanlinna theory 32H30

Malware Evasion Attacks Against IoT and Other Devices: An Empirical Study

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2024年第1期29卷 127-142页

作者： yan xu Deqiang Li Qianmu Li Shouhuai xu School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China department of Computer Science University of Colorado Colorado SpringsColorado SpringsCO 80918USA

The Internet of Things(loT)has grown rapidly due to artificial intelligence driven edge *** enabling many new functions,edge computing devices expand the vulnerability surface and have become the target of malware ***,attackers have used advanced techniques to evade defenses by transforming their malware into functionality-preserving *** systematically analyze such evasion attacks and conduct a large-scale empirical study in this paper to evaluate their impact on *** specifically,we focus on two forms of evasion attacks:obfuscation and adversarial *** the best of our knowledge,this paper is the first to investigate and contrast the two families of evasion attacks *** apply 10 obfuscation attacks and 9 adversarial attacks to 2870 malware *** obtained findings are as follows.(1)Commercial Off-The-Shelf(COTS)malware detectors are vulnerable to evasion attacks.(2)Adversarial attacks affect COTS malware detectors slightly more effectively than obfuscated malware examples.(3)Code similarity detection approaches can be affected by obfuscated examples and are barely affected by adversarial attacks.(4)These attacks can preserve the functionality of original malware examples.

关键词： Android malware obfuscation adversarial examples

Upconversion-based chiral nanoprobe for highly selective dual-mode sensing and bioimaging of hydrogen sulfide in vitro and in vivo

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第9期13卷 1878-1887页

作者： yang Lu xu Zhao Dongmei yan Yingqian Mi peng Sun xu yan Xiaomin Liu Geyu Lu State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University130012 ChangchunChina department of Immunology College of Basic Medical SciencesJilin University130021 ChangchunChina

Chiral assemblies have become one of the most active research areas due to their versatility,playing an increasingly important role in bio-detection,imaging and *** this work,chiral UCNps/CuxOS@ZIF nanoprobes are prepared by encapsulating upconversion nanoparticles(UCNps)and CuxOS nanoparticles(Nps)into zeolitic imidazolate framework-8(ZIF-8).The novel excited-state energy distribution-modulated upconversion nanostructure(NaYbF4@-NaYF4:Yb,Er)is selected as the fluorescence source and energy donor for highly efficient fluorescence resonance energy transfer(FrET).CuxOS Np is employed as chiral source and energy acceptor to quench upconversion luminescence(UCL)and provide circular dichroism(CD)*** the natural adsorption and sorting advantages of ZIF-8,the designed nanoprobe can isolate the influence of other common disruptors,thus achieve ultra-sensitive and highly selective UCL/CD dual-mode quantification of H2S in aqueous solution and in living ***,the nanoprobe is also capable of in vivo intra-tumoral H2S *** work highlights the multifunctional properties of chiral nanocomposites in sensing and opens a new vision and idea for the preparation and application of chiral nanomaterials in biomedical and biological analysis.

关键词： chiral sulfide donor

An unconstrained optimization method using nonmonotone second order Goldstein's line search

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china mathematics 2007年第10期50卷 1389-1400页

作者： Wen-yu SUN~(1+) Qun-yan ZHOU~(1,2) ~1 School of mathematics and Computer Science,nanjing normal university,nanjing 210097,china ~2 department of Basic Courses,Jiangsu Teachers university of Technology,Changzhou 213001,china 1. School of mathematics and Computer Science Nanjing Normal University Nanjing 210097 China 2. department of Basic Courses Jiangsu Teachers University of Technology Changzhou 213001 China

In this paper, an unconstrained optimization method using the nonmonotone second order Goldstein's line search is proposed. By using the negative curvature information from the Hessian,the sequence generated is shown to converge to a stationary point with the second order optimality conditions. Numerical tests on a set of standard test problems confirm the efficiency of our new method.

关键词： nonmonotone method, direction of negative curvature, line search, descent pair,unconstrained optimization

Differential polynomials and normal Families

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 1994年第2期10卷 215-217页

作者： xu Wansong department of mathematics, physics and Mechanics nanjing university of Aeronautics and Astronautics nanjing, 210016 china 1. department of mathematics Physics and Mechanics Nanjing University of Aeronautics and Astronautics 210016 Nanjing China

This paper continues the researches of yang Lo and others, and gives a further generalization of Gu’s criterion for the normality of a family of meromorphic functions.

关键词： Math net Differential polynomials and normal Families 任下

Lipid nanovehicles overcome barriers to systemic rNA delivery: Lipid components, fabrication methods, and rational design

在线全文

学校读者我要写书评

暂无评论

Acta pharmaceutica Sinica B 2024年第2期14卷 579-601页

作者： Jing yan Hao Zhang Guangfeng Li Jiacan Su yan Wei Can xu Institute of Translational Medicine Shanghai UniversityShanghai 200444China Institute of Medicine Shanghai UniversityShanghai 200444China department of Orthopedics Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghai 200092China department of Orthopedics Shanghai Zhongye HospitalShanghai 200941China Organoid research Center Shanghai UniversityShanghai 200444China department of Gastroenterology Changhai HospitalShanghai 200433China

Lipid nanovehicles are currently the most advanced vehicles used for rNA delivery,as demonstrated by the approval of patisiran for amyloidosis therapy in *** illuminate the unique superiority of lipid nanovehicles in rNA delivery,in this review,we first introduce various rNA therapeutics,describe systemic delivery barriers,and explain the lipid components and methods used for lipid nanovehicle ***,we emphasize crucial advances in lipid nanovehicle design for overcoming barriers to systemic rNA ***,the current status and challenges of lipid nanovehicle-based rNA therapeutics in clinical applications are also *** objective is to provide a comprehensive overview showing how to utilize lipid nanovehicles to overcome multiple barriers to systemic rNA delivery,inspiring the development of more high-performance rNA lipid nanovesicles in the future.

关键词： Lipid nanovehicles rNAtherapeutics Barriers to systemicrNA delivery Lipid components Fabricationmethods Lipid nanovehicledesign Extrahepatictissue targeting Organ tropism

Identifying the geographical origin and processing technology of Moyao(Myrrh)on the basis of near-infrared spectroscopy combined with chemometrics

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2024年第3期44卷 505-514页

作者： xu Ningning yan Ganming xu Fengjie DENG Linfeng QIAO Xinjiang LU Changzheng CHENG Shaomin TCM Diagnosis Institute College of Traditional Chinese MedicineJiangxi University of Chinese MedicineNanchang 330004China TCM processing Institute Pharmaceutical CollegeJiangxi University of Chinese medicineNanchang 330004China School of Electronic Information and Artificial Intelligence Shaanxi University of Science and TechnologyXi'an 710021China Jiangzhong pharmaceutical Co. Ltd.Nanchang 330096China Jiangxi Guhan refined Chinese Herbal pieces Co. Ltd.Nanchang330041.China

OBJECTIVE:To evaluate the quality of Moyao(Myrrh)in the identification of the geographical origin and processing of the ***:raw Moyao(Myrrh)and two kinds of Moyao(Myrrh)processed with vinegar from three countries were identified using near-infrared(NIr)spectroscopy combined with chemometric *** component analysis(pCA)was used to reduce the dimensionality of the data and visualize the clustering of samples from different categories.A classical chemometric algorithm(pLS-DA)and two machine learning algorithms[K-nearest neighbor(KNN)and support vector machine]were used to conduct a classification analysis of the near-infrared spectra of the Moyao(Myrrh)samples,and their discriminative performance was ***:Based on the accuracy,precision,recall rate,and F1 value in each model,the results showed that the classical chemometric algorithm and the machine learning algorithm obtained positive *** all of the chemometric analyses,the NIr spectrum of Moyao(Myrrh)preprocessed by standard normal variation or Multivariate scattering correction combined with KNN achieved the highest accuracy in identifying the geographical origins,and the accuracy of identifying the processing technology established by the KNN method after first-order derivative pretreatment was the *** best accuracy of geographical origin discrimination and processing technology discrimination were 0.9853 and 0.9706 ***:NIr spectroscopy combined with chemometric technology can be an important tool for tracking the origin and processing technology of Moyao(Myrrh)and can also provide a reference for evaluations of its quality and the clinical use.

关键词： Moyao(Myrrh) near-infrared spectroscopy geographical origin processing technology

A remark on Multilinear Oscillatory Singular Integrals

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2000年第4期16卷 655-668页

作者： Shanzhen Lu Dunyan yan department of mathematics, Beijing normal university, Beijing 100875. p. r. china department of mathematics Beijing Normal University Beijing 100875 P. R. China

In this paper we study multilinear oscillatory singular integrals with rough kernel and give a criterion of certain boundedness for this kind of operator

关键词： Multilinear oscillatory integrals Calderon-Zygmund kernel BLO space