117 research outputs found
Occurrence of pharmaceuticals and personal care products, and their associated environmental risks in Guanting Reservoir and its upstream rivers in north China
No full textEighteen selected pharmaceuticals and personal care products (PPCPs) were detected in surface water and sediments from the Guanting Reservoir (GTR) and its upstream rivers.</p
P2P LENDING MARKET: DETERMINANTS OF INTEREST RATE AND DEFAULT RISK
No full textThe peer to peer (p2p) lending industry has grown fast in recent years. This study put an eye on the credit evaluation system of one of the p2p platform named lending club. The author used the empirical method and discussed the determinants of the interest rate and the default risk in the p2p lending market. The author concluded that the evaluation system founded by lending club could predict the risk of loans. Collecting more information about borrowers’ credit history may increase the accuracy of the model
Accidental Water Pollution Risk Analysis of Mine Tailings Ponds in Guanting Reservoir Watershed, Zhangjiakou City, China
No full textOver the past half century, a surprising number of major pollution incidents occurred due to tailings dam failures. Most previous studies of such incidents comprised forensic analyses of environmental impacts after a tailings dam failure, with few considering the combined pollution risk before incidents occur at a watershed-scale. We therefore propose Watershed-scale Tailings-pond Pollution Risk Analysis (WTPRA), designed for multiple mine tailings ponds, stemming from previous watershed-scale accidental pollution risk assessments. Transferred and combined risk is embedded using risk rankings of multiple routes of the “source-pathway-target” in the WTPRA. The previous approach is modified using multi-criteria analysis, dam failure models, and instantaneous water quality models, which are modified for application to multiple tailings ponds. The study area covers the basin of Gutanting Reservoir (the largest backup drinking water source for Beijing) in Zhangjiakou City, where many mine tailings ponds are located. The resultant map shows that risk is higher downstream of Gutanting Reservoir and in its two tributary basins (i.e., Qingshui River and Longyang River). Conversely, risk is lower in the midstream and upstream reaches. The analysis also indicates that the most hazardous mine tailings ponds are located in Chongli and Xuanhua, and that Guanting Reservoir is the most vulnerable receptor. Sensitivity and uncertainty analyses are performed to validate the robustness of the WTPRA method
Bei Mei Jidu jiao Zhongguo xue sheng hui ge an yan jiu (1909-1951)
No full textOne of the most striking phenomena in the first half of the 20th century was the influx of Chinese intellectuals into America to receive Western education. Studies in the past, however, often depicted the history of American-educated Chinese students simply as the history of Chinese students returning from America. For a long time the foreign exposure and experience of the Chinese intellectuals did not draw enough attention from the academia. If we agree that one of the valuable contributions that the West can make to China was the spiritual values in Western civilization, the encounter between the intellectuals and the Christian idealism would probably be a very important issue. It is not the purpose of this research to re-write the history of American-returned students in any depth. The author would like to focus on a group of "China's American-educated youths" who has encountered modern Christianity. Although they were not all followers or baptized Christians, they adhered to the principles of Christianity as the highest standard for measuring the changing circumstances in China and in the world.To unite the Chinese Christians in the United States, the Chinese Students' Christian Association in North America was founded in 1909 by a group of Chinese Christian students. The objective of the Association was similar to the Young Men's Christian Association. Through a case study of the Chinese Students' Christian Association in North America, the author attempts to depict the spiritual feature of the American-educated Chinese students as a single group. This dissertation argues that they intentionally chose the social gospel, which adopted the Kingdom of God as the key concept, in the quest fort he modern religious belief. By making critical assessment and judgment on the non-Christian order in the society, political arena and the internationals cene, they longed for the realization of the earthly democratic kingdom which suited to the home country and the world. Disappointed in politics, the China's American-educated youths did not turn into mere spectators. The Christian idealism made them profoundly aware of the sociopolitical realm of China and the world. This thirst for a Kingdom of God became the driving force for the continuous development of the students' Christian movement.梁冠霆.Adviser: Tze-Ming Ng.Source: Dissertation Abstracts International, Volume: 70-06, Section: A, page: 2073.Thesis (doctoral)--Chinese University of Hong Kong, 2008.Includes bibliographical references (p. 159-167).Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Abstracts in Chinese and English.School code: 1307.Liang Guanting
Residents’ perceptions of ecosystem services in an urbanizing basin: A case study in the Guanting Reservoir basin, China
No full textUnderstanding stakeholders’ differences in perceptions of ecosystem services (ES) is crucial for guiding ecological conservation and planning. However, the variations of ES perception amongst different types of residents in urbanizing areas along an urban-rural gradient are still poorly understood. Combining a questionnaire-based survey, redundancy analysis, and statistical tests, we delineated the urban-rural gradient according to local residents’ socio-economic characteristics, and investigated the differences in local residents’ perceptions of ES and potential factors affecting them in the Guanting Reservoir basin, a rapidly urbanizing basin in China. The results showed that residents living in urban-rural transitional areas attached great importance to provisioning services of providing food and domestic water, regulating services of carbon sequestration and air purification, and cultural services of providing education and training, which were 0.7%–13.1%, 0.7%–9.1% and 2.5%–21.2% higher than that of residents in other areas, respectively. Age and occupation were major factors affecting residents’ perceptions. In terms of land-use types that deliver ES, the difference in perceptions of ES delivered by grassland was the greatest amongst residents. Our results support recommendations for policymakers to take into account the stakeholders’ diverse perceptions, thus promoting residents’ sense of gain on ES. © 2024 The AuthorsUniversidad Autónoma de Chil
GSR2SD: A Global Multi-Satellite Sensor High-Resolution Remote Sensing Dataset for Landslide Detection
No full text<p> GSR2SD collects remote sensing images of five satellite sensors in seven areas of the world: Wenchuan, China (2008); Rio de Janeiro, Brazil (2011); Gorkha, Nepal (2015); Jiuzhaigou, China (2015); Taiwan, China (2018); Hokkaido, Japan (2018); Emilia-Romagna, Italy (2023), a total of 6723 patches by setting different patch sizes according to different landslide scale.</p>
<p><strong><em> GSR2SD.rar</em></strong> includes all the Train, Validation, Test data used for the experiments.</p>
Effects of Afforestation Projects on Tradeoffs between Ecosystem Services: A Case Study of the Guanting Reservoir Basin, China
No full textEvaluating the responses of ecosystem services (ESs) to local land-use changes is critical for understanding the effects of ecological projects related to land planning. Change patterns in the interrelationships between ESs delivered by land-use changes, which are helpful for formulating future strategies, have not been well studied. In this study, we quantified four ESs, namely water yield (WY), water and soil conservation, nonpoint pollution control, and carbon sequestration services, based on the soil and water assessment tool model (SWAT) in the Zhangjiakou section of the Guanting Reservoir watershed, a region with a high concentration of afforestation projects. The impacts of land-use changes on changes in ESs and interrelationships of ESs were investigated by redundancy analysis. The results showed that, along with afforestation, regional water conservation and soil organic carbon content increased by 3.22% and 1.08%, respectively, whereas sediment output, WY, phosphorus output, and nitrogen output decreased by 1.82%, 3.07%, 8.08%, and 12.51%, respectively. Significant tradeoffs of regional ESs were observed between WY and other ESs, while synergies existed between other ESs. Increased areas of evergreen and deciduous forests helped in conserving water, fixing carbon, and regulating runoff. Evergreen forests tended to conserve more water than deciduous forests. With the increase in grassland area, most of the ESs can be improved while introducing fewer tradeoffs compared with those of most of other land-use types. This study provided a better understanding of the effects of afforestation on ESs tradeoffs and benefits to develop better ecological conservation strategies in afforestation regions
Residents’ perceptions of ecosystem services in an urbanizing basin: A case study in the Guanting Reservoir basin, China
No full textUnderstanding stakeholders’ differences in perceptions of ecosystem services (ES) is crucial for guiding ecological conservation and planning. However, the variations of ES perception amongst different types of residents in urbanizing areas along an urban-rural gradient are still poorly understood. Combining a questionnaire-based survey, redundancy analysis, and statistical tests, we delineated the urban-rural gradient according to local residents’ socio-economic characteristics, and investigated the differences in local residents’ perceptions of ES and potential factors affecting them in the Guanting Reservoir basin, a rapidly urbanizing basin in China. The results showed that residents living in urban-rural transitional areas attached great importance to provisioning services of providing food and domestic water, regulating services of carbon sequestration and air purification, and cultural services of providing education and training, which were 0.7%–13.1%, 0.7%–9.1% and 2.5%–21.2% higher than that of residents in other areas, respectively. Age and occupation were major factors affecting residents’ perceptions. In terms of land-use types that deliver ES, the difference in perceptions of ES delivered by grassland was the greatest amongst residents. Our results support recommendations for policymakers to take into account the stakeholders’ diverse perceptions, thus promoting residents’ sense of gain on ES
Syntheses of Boron- and Nitrogen-containing MR-TADF materials for high performance organic EL device
No full text学位論文要
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