Die mechanische Wärmetheorie: Die kinetische Theorie der Gase

Planck, Max; Pulfrich, Carl; Clausius, Rudolf

Bibliographic data

Multivolume work

Persistent identifier:: 898574846

Author:: Clausius, Rudolf

Title:: Die mechanische Wärmetheorie

Type of content:: Lehrbuch

Edition title:: Zweite umgeareitete und vervollständigte Auflage des unter dem Titel "Abhandlungen über die mechanische Wärmetheorie" erschienen Buches

Year of publication:: 1876

Place of publication:: Braunschweig

Publisher of the original:: Druck und Verlag von Friedrich Vieweg und Sohn

Identifier (digital):: 898574846

Language:: German

Additional Notes:: Früher unter dem Titel: Abhandlungen über die mechanische Wärmetheorie

Document type:: Multivolume work

Volume

Persistent identifier:: 898579678

Author:: Clausius, Rudolf

Title:: Die kinetische Theorie der Gase

Scope:: XVI, 264 Seiten

Edition title:: Zweite umgearbeitete und vervollständigte Auflage des unter dem Titel "Abhandlungen über die mechanischen Wärmetheorie" erschienenen Buches

DOI:: 10.14463/GBV:898579678

Year of publication:: 1891

Place of publication:: Braunschweig

Publisher of the original:: Druck und Verlag von Friedrich Vieweg und Sohn

Identifier (digital):: 898579678

Signature of the source:: Phys. 207(3),2

Language:: German

Other Title:: Nebentitel: Entwickelung der besonderen Vorstellungen von der Natur der Wärme als einer Art der Bewegung

Usage licence:: Public Domain Mark 1.0

Editor:: Planck, Max; Pulfrich, Carl

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2017

Document type:: Volume

Collection:: Physics

Preface

Title:: VORWORT.

Document type:: Multivolume work

Structure type:: Preface

ANALYSIS ON THE CHANGE OF VEGETATION COVERAGE IN QINGHAI PROVINCE FROM 2000 TO 2012 Jiao. Wang ^^, Qin.Yan*, Zhengjun.Liu*, Chengfeng. Luo* " Chinese Academy of Surveying and Mapping, Institute of Photogrammetry and Remote Sensing, No.28 Lianhuachi i Xi Road, Haidian District, Beijing, P.R.China — 772072971()qq.com, (yanqin, zjliu,cfluo)@casm.ac.cn Shandong University of Science and Technology, College of Geomatics, No.579 Qianwangang Road, Huangdao District, Qingdao, Shandong, P.R.China - 772072971@gqq.com KEY WORDS: Vegetation Coverage, Qinghai Province, Coefficient of Variability, Trend Line Analysis, Change Analysis, MODIS ABSTRACT: Qinghai Province is one of the important provinces on the Qinghai-Tibet Plateau in China. Its unique alpine meadow ecosystem makes it become the most concentrated areas of biodiversity in high altitudes in the world. Researching the vegetation coverage and changes of Qinghai province can reflect effectively and timely processing of changes and problems of ecological quality in the region. This research will give a long time series monitoring of the vegetation coverage of Qinghai province based on maximum value composite (MVC) and S-G filtering algorithm using MODIS data of the year of 2000-2012, then analyze the change using coefficient of variability(CV) and trend line analysis. According to research, during the past 13 years, more than half of Qinghai Province’s vegetation coverage is well, both the east and south have a high coverage, while the northwest is lower. The changing of vegetation coverage also has showed a steady and improving trend in 13 years. The largest area is slight improved area is about 29.08% of the total area, and the second largest area is significant improved area is about 21.09% of the total area. In this research can learn directly the vegetation coverage and changes of Qinghai province and provide reference and scientific basis for the protection and governance of ecological environment. 1. INTRODUCTION : changes comprehensively, which is of great importance to the regional development and ecological construction. The vegetation coverage refers to the percentage of the With the MODIS data of NDVI and LAI of 2000-2012, this vegetation’s vertical projection area in unite area, including the study estimates the vegetation coverage with non-density model, stem, leave and branch !"*. The vegetation coverage, a monitors and analyzes a long-term series of data of Qinghai comprehensive quantitative indicator of the vegetation covering province vegetation coverage in different periods, reveals its condition, is an important parameter that describes vegetation changing rules, providing evidence for scientific and rational communities and ecosystem. Vegetation coverage and its protection and land resources utilization. change are the important indicator of regional ecosystem changing which means important to hydrology, ecology and 2. DATA AND METHODS global changes. According to the monitoring method, there are two measuring vegetation coverage methods—ground survey 2.1 Study area and remote sensing measurement ©). The former method : : : ; e ; includes estimation method, sampling point method, quadrat Qinghai province is located in the west of China and northeast sampling method, the sample strip method, etc [46] But these of Qinghai-Tibet Plateau, adjacent to Xinjiang, Sichuan, Gansu, methods have strong subjective tends, large workload and high Xizang provinces. It is in east longitude 89° 35" —103° 04’ , cost which are not suitable for measuring large area coverage. north latitude 31° 39’ ~ 39° 19’ . The whole province’s With the development of remote measuring technology, it is length is 1200km, width is 800km. Qinghai province is an possible to measure coverage with it. This kind of method not important part of the world roof. Except some areas, such as only saves the extra time and money that caused by traditional Yellow River Valley and Qidamu Basin, the rest are at an ground measurement, but also can simultaneously observe, altitude of about 3000-5000 meters. In Qinghai province, the eliminating the ground measurement’s disadvantage of small- western part is higher than eastern and northwest is higher than scale measurement. the middle part. The terrain is so complicated that forms the Qinghai province, one of the four largest provinces in China, unique plateau continental climate—less raining, large having broad land and grassland, extending 8 degree of latitude, temperature changes and a lot of sunshine. The source of is one of the national five major pastoral areas. Its grassland Yangtze River and Yellow River is in Qinghai, so does the area accounts for 50.46% of the total area, mainly in Qinghai- Qinghai Lake, the largest inland saltwater lake. It is its unique Tibet Plateau, mountain Qilian and the Qidamu Basin’s natural environment that decides the corresponding features of southwest mountains. The farmland area of the province only its vegetation type. Its unique alpine meadow ecosystem makes accounts for 1.54% of the total area, mainly distributed in the it become the most concentrated areas of biodiversity in high area of east Hehuang, Gonghe Basin and Chaidamu Basin. altitudes in the world. Researching the vegetation coverage and Forest land only accounts for 6.1% and mainly distributed in changes of Qinghai province can reflect effectively and timely southeast. Researching Qinghai province’s vegetation coverage processing of changes and problems of ecological quality in the with remote measuring technology can monitor its vegetation region and provide scientific evidence for vegetation protection and ecological researches. 121

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