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

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Science China Mathematics 2024年

作者： Yingying Zhang Department of Mathematics Huzhou University

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 of 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.

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Bioinspired coloration strategy enabling perfect camouflage up to spectral dimension

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Science China Materials 2023年第10期66卷 4139-4140页

作者： Xun-En Wu Yingying Zhang Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

Spectral disguise as a plant is a crucial demand for camouflaging against target detection by emerging hyperspectral remote sensing and imaging spectrometry,which can discriminate military targets from vegetation back... 详细信息

关键词： perfect dimension military

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 screens.In 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 wearables.With 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

Rapid report of source parameters of 2023 M6.2 Jishishan,Gansu earthquake sequence

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Earth and Planetary Physics 2024年第2期8卷 436-443页

作者： ZhiGao Yang Jie Liu Yingying Zhang Wen Yang XueMei zhang China Earthquake Networks Center Beijing 100045China

The M6.2 earthquake in Jishishan,Gansu Province,on December 18,2023,caused extraordinary earthquake disasters.It was located in the northern part of the north−south seismic zone,which is a key area for earthquake monitoring in China.The newly built dense strong motion stations in this area provide unprecedented conditions for high-precision earthquake relocation,especially the earthquake focal depth.This paper uses the newly built strong motion and traditional broadband seismic networks to relocate the source locations of the M3.0 and above aftershocks and to invert their focal mechanisms.The horizontal error of earthquake location is estimated to be 0.5−1 km,and the vertical error is 1−2 km.The focal depth range of aftershocks is 9.6−14.6 km,distributed in a 12-km-long strip with SSE direction.Aftershocks in the south are more concentrated horizontally and vertically,while aftershocks in the north are more scattered.The focal mechanisms of the main shock and aftershocks are relatively consistent,and the P-axis orientation is consistent with the regional strain direction.There is a seismic blank area of M3.0 and above,about 3−5 km between the main shock and aftershocks.It is suggested that the energy released by the main shock rupture is concentrated in this area.Based on the earthquake location and focal mechanism of the main shock,it is inferred that the Northern Lajishan fault zone is the seismogenic structure of the main shock,and the main shock did not occur on the main fault,but on a secondary fault.The initial rupture depth and centroid depth of the main shock were 12.8 and 14.0 km,respectively.The source rupture depth may not be the main reason for the severe earthquake disaster.

关键词： Jishishan earthquake earthquake relocation focal mechanism strong motion data

Characteristics and source apportionment of PM_(2.5) under the dual influence of the Spring Festival and the COVID-19 pandemic in Yuncheng city

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Journal of Environmental Sciences 2023年第3期125卷 553-567页

作者： Chen zhang Yingying Zhang Xingang Liu Yafei Liu Chenlu Li State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Beijing Capital Air Environmental Science&Technology Co. Ltd.Beijing 100176China

Based on the online and membrane sampling data of Yuncheng from January 1st to February 12th,2020,the formation mechanism of haze under the dual influence of Spring Festival and COVID-19 (Corona Virus Disease) was analyzed.Atmospheric capacity,chemical composition,secondary transformation,source apportionment,backward trajectory,pollution space and enterprise distribution were studied.Low wind speed,high humidity and small atmospheric capacity inhibited the diffusion of air pollutants.Four severe pollution processes occurred during the period,and the pollution degree was the highest around the Spring Festival.In light,medium and heavy pollution periods,the proportion of SNA (SO_(4)^(2-),NO_(3)-and NH_(4)^(+)) was 59.6%,56.0%and 54.9%,respectively,which was the largest components of PM_(2.5);the[NO_(3)-]/[SO_(4)^(2-)]ratio was 2.1,1.5 and 1.7,respectively,indicating that coal source had a great influence;the changes of NOR (nitrogen oxidation ratio,0.44,0.45,0.61)and SOR (sulphur oxidation ratio,0.40,0.49,0.65) indicated the accumulation of secondary aerosols with increasing pollution.The coal combustion,motor vehicle,secondary inorganic sources and industrial sources contributed 36.8%,26.59%,11.84%and 8.02%to PM_(2.5)masses,respectively.Backward trajectory showed that the influence from the east was greater during the Spring Festival,and the pollutants from the eastern air mass were higher,which would aggravate the pollution.Meteorological and Spring Festival had a great impact on heavy pollution weather.Although some work could not operate due to the impact of the COVID-19 epidemic,the emission of pollutants did not reduce much.

关键词： PM_(2.5) COVID-19(Corona Virus Disease) Yuncheng Secondary conversion Source apportionment

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 rings.Let 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 F.As 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

Reduction of Wide Subcategories and Recollements

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Algebra Colloquium 2023年第4期30卷 713-720页

作者： Yingying Zhang Department of Mathematics Huzhou UniversityHuzhouZhejiang 313000China

In this paper,we prove a reduction result on wide subcategories of abelian categories which is similar to the Calabi-Yau reduction,silting reduction andτ-tilting reduction.More precisely,if an abelian category A admits a recollement relative to abelian categories A'and A'',which is denoted by(A',A,A'',i^(*),i_(*),i^(!),j_(!),j^(*),j_(*)),then the assignment C→j^(*)(C)defines a bijection between wide subcategories in A containing i_(*)(A')and wide subcategories in A''.Moreover,a wide subcategory C of A containing i_(*)(A')admits a new recollement relative to A'and j_(*)(C)which is induced from the original recollement.

关键词： abelian category wide subcategory recollement

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 devices.Generally,biopolymers are utilized as the passive and active building blocks to endow the flexible devices with mechanical robustness and good biocompatibility.This review aims to provide a comprehensive review on natural biopolymer-based sensing and energy devices.The diverse structures and fabrication processes of three typical biopolymers,including silk,cellulose,and chitin/chitosan,are presented.We 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

Understanding the mechanisms underlying obesity in remodeling the breast tumor immune microenvironment:from the perspective of inflammation

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Cancer Biology & Medicine 2023年第4期20卷 268-286页

作者： Hengjun zhang Mozhi Wang yingying Xu Department of Breast Surgery The First Hospital of China Medical UniversityShenyang 110001China

Obesity is a well-known modifiable risk factor for breast cancer and is considered a poor prognostic factor in pre-and post-menopausal women.While the systemic effects of obesity have been extensively studied,less is known about the mechanisms underlying obesityassociated cancer risk and the local consequences of obesity.Thus,obesity-induced inflammation has become the focus of research interest.Biologically,the development of cancer involves a complex interaction with numerous components.As the tumor immune microenvironment changes due to obesity-triggered inflammation,an increase in infiltration occurs for proinflammatory cytokines and adipokines,as well as adipocytes,immune cells,and tumor cells in the expanded adipose tissue.Complicated cellular-molecular crosstalk networks change critical pathways,mediate metabolic and immune function reprogramming,and have a significant role in tumor metastasis,proliferation,resistance,angiogenesis,and tumorigenesis.This review summarizes recent research findings on how inflammatory mediators in the in situ tumor microenvironment regulate the occurrence and development of breast cancer in the context of obesity.We analyzed the heterogeneity and potential mechanisms of the breast cancer immune microenvironment from the perspective of inflammation to provide a reference for the clinical transformation of precision targeted cancer therapy.

关键词： Breast cancer obesity inflammatory mediator tumor microenvironment metabolism