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Biotic Resources Abundance and the Corresponding Causes in Panxi Area

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 929-936页

作者： XU Yun SU Chunjiangi liu xingliang MAN Zhenchuang LI Ping Institute of Mountain Hazards and Environment ChineseAcademy of Sciences Chengdu 610041 Sichuan China Graduate University of Chinese Academy of Sciences Beijing100049 China College of Bioengineering Southwest Jiaotong UniversityChengdu 610031 Sichuan China

This paper gives a detailed introduction to the biotic resources in Panxi Area and lists the most typical biotic resources in this area. The authors of this paper adopt the biotic resource abundance evaluation index model R1= （S0t -- S1t ） × S1i-1 （i= 1,2,3, …n） to make a quantitative calculation of the biotic resource abundance in this area, and the calculation results show that this area abounds in biotic resources. Through the analysis of the causes of abundant biotic resources in this area, the luxuriant biotic resources in Panxi Area are largely attributed to the complex and varied environment, atrocious climate in history and the introduction of alien species. The purpose of this paper is to point out that biotic resource exploitation is one of the driving forces of economic development in this area, and to emphasize the necessity of biotic resource preservation and its harmonious development with the environment.

关键词： biotic resources abundance abundance evaluation index model causes

Altitudinal variations of hydraulic traits in Faxon fir(Abies fargesii ***):Mechanistic controls and environmental adaptability

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Forest Ecosystems 2022年第3期9卷 427-438页

作者： Shao-an Pan Guangyou Hao Xuhua Li Qiuhong Feng xingliang liu Osbert J.Sun School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing100083China Institute of Forestry and Climate Change Research Beijing Forestry UniversityBeijing100083China Institute of Applied Ecology Chinese Academy of SciencesShenyang110016China Sichuan Provincial Key Laboratory of Ecological Restoration and Conservation for Forest and Wetland Sichuan Academy of Forestry SciencesChengdu610081China Sichuan Wolong Forest Ecosystem Research Station Wenchuan623006China

Global climate change has been seen to result in marked impacts on forest ecosystems such as accelerated tree mortality worldwide due to incidental hydraulic failure caused by intensified and more frequent occurrence of extreme drought and ***,it is well understood how the tree hydrological strategies would adjust to environmental variability brough about by climate *** we investigated the hydraulic adjustment as a mechanism of acclimation to different climate conditions along an altitudinal gradient in Faxon fir(Abies fargesii ***)–a tree species that plays a key role in conservation of wildlife and maintenance of ecosystem services in subalpine *** hydraulic traits and selective morphological and physiological variables were measured seasonally along an altitudinal gradient from 2,800 to 3,600 m *** found that the native percentage loss of conductivity(PLC)increased with altitude across the seasonal *** the native sapwood-specific hydraulic conductivity(Ks)and native leaf-specific hydraulic conductivity(Kl)significantly decreased with altitude for measurements in July and October,coinciding with the timing for peak growth and pre-dormancy,*** morphological traits varied toward more conservative tree hydrological strategies with increases in altitude,exhibiting trade-offs with hydraulic *** total non-structural carbohydrates in both needle(NSCNeedle)and branch(NSCBranch)as well as photosynthetic capacity of current-year leaves played variable roles in maintaining the integrity of the hydraulic functioning and shaping the hydraulic adjustment under prevailing environmental *** findings indicate that Faxon fir possesses some degree of hydraulic adaptability to water limitation imposed by climate fluctuations in subalpine region through morphological and physiological modifications.

关键词： Climate change Eco-safety Environmental vulnerability Faxon fir Hydraulic risk Habitat constraints Water stress Subalpine

The protein corona modulates the inflammation inhibition by cationic nanoparticles via cell-free DNA scavenging

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Bioactive Materials 2022年第7期7卷 249-259页

作者： xingliang liu Huiyi Liang Yanzi Yan Jingjiao Wu Massimo Bottini Lixin liu Yongming Chen School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSun Yat-sen UniversityGuangzhou510275China Department of Experimental Medicine University of Rome Tor VergataRome00133Italy

A central paradigm in nanomedicine is that when synthetic nanoparticles(NPs)enter the body,they are immediately cloaked by a corona of macromolecules(mostly proteins)that mediates the role of the physico-chemical properties in the NP biological functions(the“coronation paradigm”).In this work,we focused on the assessment of the“coronation paradigm”for cationic NPs(cNPs)used as rheumatoid arthritis(RA)drugs due to their ability to scavenge cell-free DNA(cfDNA).We fabricated series of cNPs uniformly coated with single or di-hydroxyl groups and different types of amino groups and showed that hydroxylated nanoparticles displayed a prolonged retention in inflamed joints and greater anti-inflammatory effect in collagen-induced arthritis(CIA)rats than the non-hydroxylated ***,the cNPs with secondary amines and a di-hydroxyl shell showed the best performance among the tested *** analysis showed that the cNPs with a di-hydroxyl shell adsorbed less opsonin proteins than the cNPs carrying mono hydroxyl groups and non-hydroxylated ones,which may provide a mechanistic explanation for the different biodistribution profiles of ***,this study suggests that the protein corona mediates the effects of the surface chemistry on the fate and functions of cNPs as anti-RA drugs.

关键词： Cationic nanoparticles Cell-free DNA Inflammation inhibition Protein corona Rheumatoid arthritis

Scaffold-like 3D networks fabricated via the organogelation of β-diketone-boron for fluorescent sensing organic amine vapors

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Chinese Science Bulletin 2012年第33期57卷 4264-4271页

作者： QIAN Chong CAO KaiYu liu xingliang ZHANG XiaoFei XU DeFang XUE PengChong LU Ran State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin UniversityChangchun 130012China

A new compoud based on carbazole functionalized β-diketone-boron difluoride(1) was *** is found that compoud 1 can gel toluene,ethylbenzene and some mixed solvents,and 3D networks consisting lots of nanofibers were observed using SEM and fluorescence *** molecular packing model in xerogel 1 was proposed according to the results of XRD,UV/Vis absorption and semiempirical *** obtained nanofibers prepared through organogelation can emit strong orange light under *** is interesting that the fluorescence of the nanofiber-based film can be quenched quickly and significantly upon exposed to the vapors of n-butylamine,dibutylamine,triethylamine,triethylamine,cyclohexylamine,aniline and pyridine instead of other common ***,the response time of the nanofiber-based film to aniline vapor reached ca.0.59 s,and the detection limit for aniline was as low as ca.0.83 mL/m 3.

关键词：二氟化硼网络制造二酮蒸汽脚手架有机胺光传感纳米纤维

Lane-change path planning and control method for self-driving articulated trucks

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Journal of Intelligent and Connected Vehicles 2020年第2期3卷 49-66页

作者： Tao Peng xingliang liu Rui Fang Ronghui Zhang Yanwei Pang Tao Wang Yike Tong School of Electrical and Information Engineering Tianjin UniversityTianjinChina Joint Laboratory for Internet of Vehicles Ministry of Education-China Mobile Communications CorporationBeijingChina China Automotive Technology and Research Center Co.Ltd. TianjinChina Guangdong Key Laboratory of Intelligent Transportation System School of Intelligent Systems EngineeringSun Yat-sen UniversityZhuhaiChina Tianjin University of Technology and Education TianjinChina Zhejiang University of Technology HangzhouChina

Purpose–This study aims to develop an automatic lane-change mechanism on highways for self-driving articulated trucks to improve trafﬁc ***/methodology/approach–The authors proposed a novel safety lane-change path planning and tracking control method for articulated vehicles.A double-Gaussian distribution was introduced to deduce the lane-change trajectories of tractor and trailer coupling characteristics of intelligent vehicles and *** different steering and braking maneuvers,minimum safe distances were modeled and *** safety and ergonomics,the authors invested multilevel self-driving modes that serve as the basis of decision-making for vehicle ***,a combined controller was designed by feedback linearization and single-point preview optimization to ensure the path tracking and robust *** hardware in the loop simulation platform was built to verify the effectiveness of the designed ***–The numerical simulation results demonstrated the path-planning model feasibility and controller-combined decision mechanism effectiveness to self-driving *** proposed trajectory model could provide safety lane-change path planning,and the designed controller could ensure good tracking and robust stability for the closed-loop nonlinear ***/value–This is a fundamental research of intelligent local path planning and automatic control for articulated *** are two main contributions:theﬁrst is a more quantiﬁable trajectory model for self-driving articulated vehicles,which provides the opportunity to adapt vehicle and scene *** second involves designing a feedback linearization controller,combined with a multi-objective decision-making mode,to improve the comprehensive performance of intelligent *** study provides a valuable reference to develop advanced driving assistant system and intelligent control systems for self-driving articulated vehicles.

关键词： Feedback linearization Combined controller Double Gaussian distribution Lane-change path planning Preview optimization Self-driving articulated truck

Soil Microbial Population Dynamics along a Chronosequence of Moist Evergreen Broad-leaved Forest Succession in Southwestern China

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Journal of Mountain Science 2010年第4期7卷 327-338页

作者： ZHU Wanze CAI Xiaohu liu xingliang WANG Jinxi CHENG Song ZHANG Xiuyan LI Dengyu LI Maihe Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China Sichuan Academy of Forestry Chengdu 610081 China Siehuan Agricultural University Yaan 625014 China Swiss Federal Research Institute WSL Zuereherstrasse 111 CH-8903 Birrnensdorf Switzerland

Little is known about whether soil microbial population dynamics are correlated with forest *** test the hypotheses that(1) soil microbial composition changes over successional stages,and(2) soil microbial diversity is positively correlated with plant species diversity,we determined the soil microbial populations,community composition,and microflora diversity in evergreen broad-leaved forests along a chronosequence of vegetation succession from 5 to 300 years in southwestern *** soil microbial community was mainly composed of bacteria(87.1-98.7% of the total microorganisms and 10 genera identified),fungi(0.3-4.0%,7 genera),and actinomycetes(2.1-9.1%,8 species and 1 genus).There were significant differences in soil microbial populations among different successional stages and within the four *** seasonal variations of the soil microbial community may be associated with the seasonal changes in environmental *** changes in soil microbial diversity(Shannon-Wiener index) with successional time followed one-humped,convex curves peaked at-100 years since restoration,which is identical with the trends of the aboveground plant *** plant diversity resulting in enhanced nutrient flow and root exudation may contribute to positive relationships between the soil microbial diversity and plant ***,decreases in soil microbial diversity in the late-successional stages appear to be related to the net loss in species richness that occurs after 100 years since *** findings confirm the intermediate disturbance hypothesis that suggests diversity peaks at midsuccessional stages.

关键词： Actinomycetes Bacteria Fungi Microbial diversity Moist evergreen broad-leavedforest Seasonal dynamics

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新见李鸿章书札十通考释

安徽史学 2022年第4期 137-147页

作者：刘兴亮四川大学历史文化学院四川成都610065

本文以重庆博物馆(重庆中国三峡博物馆)藏李鸿章致周恒祺十通书札为研究对象,在对书札进行整体移录的基础上,略行考释,定其年代,辨正所系人物、事迹。此批书札可真实还原李鸿章、周恒祺双方交往的部分细节,亦能为研究晚清漕务、海防、... 详细信息

本文以重庆博物馆(重庆中国三峡博物馆)藏李鸿章致周恒祺十通书札为研究对象,在对书札进行整体移录的基础上,略行考释,定其年代,辨正所系人物、事迹。此批书札可真实还原李鸿章、周恒祺双方交往的部分细节,亦能为研究晚清漕务、海防、赈事以及官场生态提供一批新材料。

关键词：李鸿章周恒祺书札

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光绪初年李鸿章致周恒祺书札42通

历史档案 2023年第1期 20-45页

作者：刘兴亮重庆中国三峡博物馆 400015

李鸿章是晚清重臣之一。周恒祺,字子维,号福核、福皆,湖北黄陂人,咸丰二年(1852)进士。历官山西道监察御史、京畿道监察御史、工科给事中、山东督粮道、广东按察使、福建布政使、直隶布政使、山东巡抚、漕运总督等。重庆中国三峡博物馆... 详细信息

李鸿章是晚清重臣之一。周恒祺,字子维,号福核、福皆,湖北黄陂人,咸丰二年(1852)进士。历官山西道监察御史、京畿道监察御史、工科给事中、山东督粮道、广东按察使、福建布政使、直隶布政使、山东巡抚、漕运总督等。重庆中国三峡博物馆所藏李鸿章致周恒祺书札共58通,系20世纪50年代购自周氏后人周君适之手。兹辑录其中未刊书札42通,时间从光绪四年(1878)周恒祺担任直隶布政使始,到光绪七年底出任漕运总督止,内容涉及广泛,诸如官员选任、东陵营修、海防思想、中日俄外交争端、庆军月饷、漕运之制、河患治理以及重要人物品评等,可供近代史相关研究参考。

关键词：直隶布政使山东巡抚给事中监察御史历官人物品评光绪四年督粮道

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郭子章地理学著述成就述论

热带地理 2012年第5期32卷 470-475页

作者：刘兴亮暨南大学历史地理研究中心广州510632

明万历朝的军事家、政治家郭子章,战功卓著,政绩突出,也是一位成就出色的大学者,其地理学尤其是历史人文地理方面的著述极为丰富。渊博的知识、非凡的经历,加上严谨的治学精神,造就了其地理学著述的价值。其地理学著述中,《郡县释名》... 详细信息

明万历朝的军事家、政治家郭子章,战功卓著,政绩突出,也是一位成就出色的大学者,其地理学尤其是历史人文地理方面的著述极为丰富。渊博的知识、非凡的经历,加上严谨的治学精神,造就了其地理学著述的价值。其地理学著述中,《郡县释名》是我国历史上最早的一部专门注释地名渊源的著作,在地名学史上占有重要地位;《黔记》、《豫章书》等大量方志,涉及江西、贵州等省之自然、人文地理内容;此外,郭子章在西南民族地区行政区划方面的探索与实践也在《黔草》等地方文献中多有体现。这些地理学著述为研究郭子章地理学思想、历代地名沿革、明代西南地区自然和人文地理提供了宝贵的资料。

关键词：郭子章地名学方志学历史人文地理