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A Cluster Algorithm for the 2-D SU(3)×SU(3) Chiral Model

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Chinese Physics Letters 1996年第7期13卷 549-552页

作者： JI Da-ren zhang Jian-bo Zhejiang Institute of Modern Physics Zhejiang UniversityHangzhou 310027

To extend the cluster algorithm to SU(N)×SU(N)chiral models,a variant version of Wolff's cluster algorithm is proposed and tested for the 2-dimensional SU(3)×SU(3)chiral *** results show that the new method can redu... 详细信息

关键词： SU(3) model chiral

Health Inequalities during 20 Years of Rapid Economic Development in China (1980-2000):A Mortality Analysis

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Biomedical and Environmental Sciences 2011年第4期24卷 329-334页

作者： ZHENG XiaoYing SONG XinMing CHEN Gong you YunZhong ren Qiang LIU JuFen zhang Lei TAN LingFang WEI JiHong CHEN QiuYuan Institute of Population Research WHO Collaborating Center on Reproductive Health and Population SciencePeking UniversityBeijing 100871China

Objective To examine the influence of China＇s economic reforms on population health and regional mortality *** Longitudinal study measuring the mortality trends and their regional *** data from the three most recent national censuses,we used the model life table to adjust the mortality levels within the population for each census,and to calculate life *** then examined the variation in patterns of mortality and population health by economic status,region and gender from *** Life expectancy varied with economic status,province,and *** showed that,although life expectancy in China had increased overall since the early 1980s,regional differences became more *** expectancy for populations who live in the eastern coastal provinces are greater than those in the western *** Differences in life expectancy are primarily related to differences in regional economic development,which in turn exacerbate regional health ***,it is necessary to improve economic development in less developed regions and to improve health policies and the public health system that address the needs of everyone.

关键词： Economic development Health inequalities Life expectancy Model life tables Mortality

The feasibility of oral targeted drug delivery: Gut immune to particulates?

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Acta Pharmaceutica Sinica B 2023年第6期13卷 2544-2558页

作者： Yuehong ren Wei Wu Xingwang zhang Department of Pharmaceutics College of PharmacyJinan UniversityGuangzhou 511443China Center for Medical Research and Innovation Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghai 201399China Key Laboratory of Smart Drug Delivery of MOE School of PharmacyFudan UniversityShanghai 201203China

Targeted drug delivery is constantly updated with a better understanding of the physiological and pathological features of various diseases. Depending on high safety, good compliance and many other undeniable advantages, attempts have been undertaken to complete an intravenous-to-oral conversion of targeted drug delivery. However, oral delivery of particulates to systemic circulation is highly challenging due to the biochemical aggressivity and immune exclusion in the gut that restrain absorption and access to the bloodstream. Little is known about the feasibility of targeted drug delivery via oral administration(oral targeting) to a remote site beyond the gastrointestinal tract. To this end, this review proactively contributes to a special dissection on the feasibility of oral targeting. We discussed the theoretical basis of oral targeting, the biological barriers of absorption, the in vivo fate and transport mechanisms of drug vehicles, and the effect of structural evolution of vehicles on oral targeting as well. At last, a feasibility analysis on oral targeting was performed based on the integration of currently available information. The innate defense of intestinal epithelium does not allow influx of more particulates into the peripheral blood through enterocytes. Therefore, limited evidence and lacking exact quantification of systemically exposed particles fail to support much success with oral targeting. Nevertheless, the lymphatic pathway may serve as a potentially alternative portal of peroral particles into the remote target sites via M-cell uptake.

关键词： Oral targeted drug delivery Biological barriers In vivo fate Nanoparticles Transport mechanisms Delivery strategies Lymphatic transport Feasibility

Gorenstein Projective Dimensions of Modules over Minimal Auslander-Gorenstein Algebras

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Algebra Colloquium 2021年第2期28卷 337-350页

作者： Shen Li rené Marczinzik Shunhua zhang School of Mathematics Shandong UniversityJinan 250100China School of Science Shandong Jianzhu UniversityJinan 250101China Institute of Algebra and Number Theory University of StuttgartGermany

In this article we investigate the relations between the Gorenstein projective dimensions of Λ-modules and their socles for re-minimal Auslander-Gorenstein algebras Λ.First we give a description of projective-injective Λ-modules in terms of their *** we prove that a Λ-module N has Gorenstein projective dimension at most n if and only if its socle has Gorenstein projective dimension at most n if and only if N is cogenerated by a projective Λ-***,we show that n-minimal Auslander-Gorenstein algebras can be characterised by the relations between the Gorenstein projective dimensions of modules and their socles.

关键词： Gorenstein projective dimension minimal Auslander-Gorenstein algebra higher Auslander algebra

Understanding Differences in Event Attribution Results Arising from Modeling Strategy

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Journal of Meteorological Research 2022年第1期36卷 49-60页

作者： Wenxia zhang Liwen ren Tianjun ZHOU State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 University of Chinese Academy of Sciences Beijing 100049

While there is high confidence that human activities have increased the likelihood and severity of hot extreme events over many parts of the world,there is notable spread in quantitative estimates of anthropogenic influence even on a single *** better understand the uncertainty of attribution results,here we compare different event attribution methods using the 2015 July-August record-breaking heat event in northwestern China as a case *** address the anthropogenic influence on the likelihood of the extreme event,we employ attribution runs with two modeling strategies—atmosphere-only and coupled simulations—with different *** atmosphere-only attribution runs,given the observed sea surface boundary conditions and external forcings in 2015,it is estimated that anthropogenic forcing has increased the likelihood of hot extremes such as that observed in 2015 in the target region,by approximately 27 and 12 times in MIROC5 and HadGEM3-A-N216,*** Coupled Model Intercomparison Project phase 5(CMIP5)fully coupled attribution runs,given the external forcing at the 1961-2015 level and regardless of sea surface boundary conditions,there is a 21-fold increase in the likelihood of similar heat events due to anthropogenic *** differences in quantitative attribution results can arise from modeling strategies,which are tightly linked to different conditioning in ***,different ocean boundary conditions,external forcings,and air-sea coupling processes contribute to different attribution results between the two modeling *** each modeling strategy,model uncertainty affects quantitative attribution *** comparison of different attribution methods provides a better understanding of the uncertainty of attribution results,which is useful in synthesizing and interpreting attribution results.

关键词： event attribution anthropogenic influence uncertainty modeling strategy

Effects of surface roughening on antibacterial and osteogenic properties of Ti-Cu alloys with different Cu contents

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Journal of Materials Science & Technology 2021年第29期88卷 158-167页

作者： Wei zhang Shuyuan zhang Hui Liu Ling ren Qiang Wang Yang zhang School and Hospital of Stomatology China Medical UniversityShenyang 110001China Liaoning Provincial Key Laboratory of Oral Diseases Shenyang 110001China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

In order to reduce implant-related infections and improve early osseointegration,we performed HF+anodic oxidation on the surface of the new antibacterial Ti-Cu alloy to make the titanium-based implants have a micro/submicron *** this basis,a series of surface-modified Ti-x Cu alloys with different Cu contents(3,5 and 7 wt%)were fabricated and a comprehensive study was conducted on MC3 T3-E1 cell adhesion,proliferation,apoptosis and its antibacterial activity against Staphylococcus *** showed that the Ti-x Cu alloys by HF etching+anodized possessed multifunctional characteristics of antibiofilm and antibacterial abilities,excellent biocompatibility and osteogenesis promoting *** of Cu content significantly contributed to the antibacterial and osteogenic properties of HF etching+anodized Ti-Cu *** proliferation rates of HF etching+anodized Ti-7 Cu alloys were lower than those of Ti-3 Cu and Ti-5 Cu alloys,while the early cell apoptosis rates were higher than Ti-3 Cu and Ti-5 Cu *** the above results finally presented that the HF etching+anodized Ti-5 Cu alloy exhibited extremely strong antibacterial properties,good biological compatibility and osteogenic ability,as well as the most excellent ductility and corrosion resistance,providing a great potential application for the future dental implantation.

关键词： Ti-Cu Cu contents HF Antibacterial Osteogenesis

Spatial Distribution Characteristics and Influencing Factors of Agricultural Specialized Villages in Guangdong Province,China

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Chinese Geographical Science 2022年第6期32卷 1013-1034页

作者： YANG ren zhang Xin XU Qian School of Geography and Planning Sun Yat-sen UniversityGuangzhou 510006China Land Research Center Sun Yat-sen UniversityGuangzhou 510275China School of Public Administration Guangdong University of Finance&EconomicsGuangzhou 510320China

China is vigorously implementing a rural revitalization strategy with the prosperity of rural industries as the primary *** characteristic economy of’One Village One Product’(OVOP)is particularly significant in promoting rural revitalization and increasing farmers’*** identifying the spatial distribution characteristics and influencing factors of agricultural specialized villages(ASVs)under OVOP provides a preliminary research basis for constructing the theoretical framework of specialization and clustering of rural industrial *** study takes Guangdong Province,China as an example,using kernel density estimation,Ripley’s K function,geometric fractals,principal component regression and other methods to identify the spatial distribution characteristics and influencing factors of *** was found that the ASVs in Guangdong Province are dominated by the planting industry,with an uneven number in space and a multi patch ***,ASVs are mainly distributed in the Chaoshan Plain in the eastern Guangdong,the northern mountainous area of Guangzhou,and the eastern part of Maoming *** spatial distribution mode obeys the aggregation distribution pattern at the scale of province,region and municipality(prefecture-level city).In addition,the formation and development of ASVs are affected by multiple internal and external *** influence of basic factors such as natural environmental conditions is gradually weakening,while the influence of social and economic factors such as market demand is gradually *** study can enrich the research results of ASVs and provide guidance and reference for the long-term and high-quality development of rural industry revitalization.

关键词： One Village One Product(OVOP) agricultural specialization spatial distribution rural industry revitalization

Impact of tropical Atlantic warming on the Pacific Walker circulation with numerical experiments of CGCM

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Advances in Climate Change Research 2021年第6期12卷 757-771页

作者： EN Si-Min zhang Shao-Qing LU Lü JIANG Ying-Jing MA you-Wei Key Laboratory of Physical Oceanography Ministry of Education/Institute for Advanced Ocean Study/Frontiers Science Center for Deep Ocean Multispheres and Earth System(DOMES)Ocean University of ChinaQingdao266000China Pilot National Laboratory for Marine Science and Technology(QNLM) QingdaoChina International Laboratory for High-Resolution Earth System Model and Prediction(iHESP) Qingdao266000China The College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao266000China

The Pacific Walker circulation(PWC)was weak in the 20th century,but its strength increased in an interdecadal scale in the late *** studies have suggested that it could be caused by the warming of the tropical Atlantic Ocean,or induced by the warming of the tropical Indian *** tropical Atlantic Ocean would not only directly affect the PWC through the equatorial east Pacific to the west,but also produce an indirect effect to the east through the equatorial west Indian *** a coupled general circulation model,we designed a series of tropical Atlantic Heating and Heating_Shut experiments with different heating rates,to detect the mechanism of the impact of tropical Atlantic warming on the *** show that the tropical Atlantic heating weakens the Atlantic Walker circulation but strengthens the *** of multiple physical variables with coherent lowereupper troposphere structure show the responses of the Indian Ocean to the Atlantic heating play a critical role in the strengthening of the *** Atlanticelinked atmosphere over the tropical Indian Ocean exerts a significantly positive heat flux onto the ocean there,greatly warming the tropical Indian Ocean,especially on the west *** produces strong convectively ascending at the equatorial West Indian Ocean,but descending at the East-central Indian Ocean,corresponding to a‘Walker’circulation and an‘antieWalker’circulation situated at the West and East equatorial Indian Ocean ***,the convergence(divergence)of the lower(upper)troposphere over the Indo‒Pacific region is also *** this way,the tropical Atlantic heating is linked to the PWC through the circulation over the equatorial Indian *** study serves as a preliminary step to understand the impact of tropical Atlantic warming on the PWC,more Atlantic heating sensitivity studies with multi-model experiments are required to further reveal the linkage of the Pacific and Atlantic.

关键词： Tropical Atlantic warming Pacific Walker circulation Tropical Indian Ocean Model simulation

The Existence of Solutions for the Problem in the Optical Lattice with Nonlocal Nonlinearity

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Acta Mathematicae Applicatae Sinica 2012年第4期28卷 681-690页

作者： Rui-feng zhang ren-tao LIU Institute of Contemporary Mathematics Henan University College of Mathematics and Information Science Henan University

We address the impact of nonlocality in the physical features exhibited by solitons supported by Kerr-type nonlinear media with an imprinted optical lattice. We discuss the solitons solution for a class of nonlinear SchrSdinger equations in the optical lattice with nonlocal nonlinearity. We also show via a uniform priori estimate that existence and uniqueness of the global solution for the initial problem.

关键词： SchrSdinger equation Cauchy problem contract mapping principle Calerkin method