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An Efficient Proxy Ring Signature Without Bilinear Pairing

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Chinese Journal of Electronics 2019年第3期28卷 514-520页

作者： zhang yingying ZENG Jiwen School of Science Chongqing University of Posts and Telecommunications School of Mathematical Sciences Xiamen University School of Mathematics Science Xinjiang Normal University

Proxy ring signature is a proxy signature designed to protect the privacy of the proxy signer. In this paper, we propose a new proxy ring signature based on the Schnorr’s signature. Our scheme combines the idea of the Schnorr’s signature with the method of existing structure of proxy ring signature. In order to improve the performance, we eliminate the use of bilinear pairing operation. We only use the hash function in the signature verification phase. Because of above features, the proxy ring signature scheme we proposed is more efficient in computation. We also prove that our scheme is unforgeable against all kinds of adversaries in the random oracle model.

关键词： Ring signature Proxy signature Proxy ring signature Random oracle

Gluing support τ-tilting modules via symmetric ladders of height 2

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Science China Mathematics 2024年第10期67卷 2217-2236页

作者： yingying zhang Department of Mathematics Huzhou UniversityHuzhou 313000China

Gluing techniques with respect to a recollement have long been studied. Recently, ladders of recollements of abelian categories were introduced as important tools. In this paper, we present explicit constructions of gluing support τ-tilting modules via symmetric ladders of height two. Moreover, we apply the result to triangular matrix algebras to give a detailed version of the known Jasso's reduction and study maximal green sequences.

关键词： support-tilting module torsion class semibrick ladder triangular matrix algebra maximal green sequence

Display textiles:illuminating the way we live

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Science China Chemistry 2021年第7期64卷 1115-1116页

作者： yingying zhang Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Department of ChemistryTsinghua UniversityBeijing100084China

As an important part of modern electronics,displays are evolving from rigid and bulky modules to flexible *** recent years,integration of displays into clothing or even directly on human skin is highly desired in order to fulfil the requirements for convenient display technologies of smart *** advantages of flexibility,deformability and breathability of textiles,displays incorporated in textiles may help pave the way for smart interactive clothing,boosting the development of emerging high-tech fields such as humanmachine interactions,the internet-of-things,and artificial intelligence[1].

关键词： textiles smart boosting

Excellent Extensions and Homological Conjectures

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Algebra Colloquium 2018年第4期25卷 619-626页

作者： yingying zhang Department of Mathematics Hohai UniversityNanjing 210098China

In this paper,we introduce the notion of excellent extensions of *** F be an excellent extension of an Artin algebra∧,we prove that∧satisfies the Gorenstein symmetry conjecture(resp.,finitistic dimension conjecture,Auslander-Gorenstein conjecture,Nakayama conjecture)if and only if so does *** a special case of excellent extensions,when G is a finite group whose order is invertible in∧acting on∧and∧is G-stable,we prove that if the skew group algebra∧G satisfies strong Nakayama conjecture(resp.,generalized Nakayama conjecture),then so does∧.

关键词： excellent extension skew group algebra homological conjecture

Coupled Sasaki-Ricci solitons

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Science China Mathematics 2021年第7期64卷 1447-1462页

作者： Akito Futaki yingying zhang Yau Mathematical Sciences Center Tsinghua UniversityBeijing 100084China

Motivated by the study of coupled Kahler-Einstein metrics by Hultgren and Witt Nystrom(2018)and coupled Kahler-Ricci solitons by Hultgren(2017),we study in this paper coupled Sasaki-Einstein metrics and coupled Sasaki-Ricci *** first show an isomorphism between the Lie algebra of all transverse holomorphic vector fields and certain space of coupled basic functions related to coupled twisted Laplacians for basic functions,and obtain extensions of the well-known obstructions to the existence of Kahler-Einstein metrics to this coupled *** results are reduced to coupled Kahler-Einstein metrics when the Sasaki structure is *** we show the existence of toric coupled Sasaki-Einstein metrics when the basic first Chern class is positive extending the work of Hultgren(2017).

关键词： coupled Kahler-Einstein metrics coupled Sasaki-Einstein metrics coupled Sasaki-Ricci solitons

Commutators and Semi-commutators of Monomial Toeplitz Operators on the Pluriharmonic Hardy Space

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Chinese Annals of Mathematics,Series B 2020年第5期41卷 717-732页

作者： yingying zhang Xingtang DONG School of Mathematics Tianjin UniversityTianjin 300354China

In this paper,the authors completely characterize the finite rank commutator and semi-commutator of two monomial Toeplitz operators on the pluriharmonic Hardy space of the torus or the unit *** a consequence,many non-... 详细信息

关键词： Toeplitz operator Pluriharmonic Hardy space Commutator Semi-commutator Monomial symbol

Natural Biopolymers for Flexible Sensing and Energy Devices

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Chinese Journal of Polymer Science 2020年第5期38卷 459-490,I0006页

作者： Muqiang Jian yingying zhang Zhongfan Liu Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute Beijing 100095China Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

Natural biopolymers feature natural abundance,diverse chemical compositions,tunable properties,easy processability,excellent biocompatibility and biodegradability,as well as nontoxicity,providing new opportunities for the development of flexible sensing and energy ***,biopolymers are utilized as the passive and active building blocks to endow the flexible devices with mechanical robustness and good *** review aims to provide a comprehensive review on natural biopolymer-based sensing and energy *** diverse structures and fabrication processes of three typical biopolymers,including silk,cellulose,and chitin/chitosan,are *** review their utilities as the supporting substrates/matrix,active middle layers,separators,electrolytes,and active components of flexible sensing devices(sensors,actuators,transistors)and energy devices(batteries,supercapacitors,triboelectric nanogenerators).Finally,the remaining challenges and future research opportunities are discussed.

关键词： Biopolymers Silk Cellulose Electronics Energy devices

G-stable support τ-tilting modules

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Frontiers of Mathematics in China 2016年第4期11卷 1057-1077页

作者： yingying zhang Zhaoyong HUANG Department of Mathematics Nanjing University Nanjing 210093 China

Motivated by T-tilting theory developed by T. Adachi, O. Iyama, I. Reiten, for a finite-dimensional algebra A with action by a finite group G, we introduce the notion of G-stable support τ-tilting modules. Then we establish bijections among G-stable support τ-tilting modules over ∧, G-stable two-term silting complexes in the homotopy category of bounded complexes of finitely generated projective ∧-modules, and G-stable functorially finite torsion classes in the category of finitely generated left ∧-modules. In the case when ∧ is the endomorphism of a G-stable cluster-tilting object T over a Horn-finite 2-Calabi- Yau triangulated category L with a G-action, these are also in bijection with G-stable cluster-tilting objects in L. Moreover, we investigate the relationship between stable support τ-tilitng modules over ∧ and the skew group algebra ∧G.

关键词： G-stable support τ-tilting modules G-stable two-term silting complexes G-stable functorially finite torsion classes G-stable cluster-tilting objects bijection skew group algebras

Airport automatic detection in large space-borne SAR imagery

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Journal of Systems Engineering and Electronics 2010年第3期21卷 390-396页

作者： Shaoming zhang Yi Lin Xiaohu zhang yingying Chen Research Center of Remote Sensing and Spatial Informatics Technology Tongji University Shanghai 200092 R R. China

A method to detect airports in large space-borne synthetic aperture radar（SAR） imagery is ***,the large SAR imagery is segmented according to amplitude characteristics using maximum a posteriori（MAP） estimator based on the heavytailed Rayleigh *** attention is then paid on the object of interest（OOI） extracted from the large *** minimumarea enclosing rectangle（MER） of OOI is created via a rotating calipers *** projection histogram（PH） of MER for OOI is then computed and the scale and rotation invariant feature for OOI are extracted from the statistical characteristics of PH.A support vector machine（SVM） classifier is trained using those feature parameters and the airport is detected by the SVM classifier and Hough *** application in space-borne SAR images demonstrates the effectiveness of the proposed method.

关键词： synthetic aperture radar(SAR) imagery airport detection image segmentation minimum-area enclosing rectangle support vector machine(SVM).