296 research outputs found
Retrofitting and Strengthening Design for the Former Yihe Spinner Factory in Shanghai
No full textThe building of the formerly Yihe Spinner Factory in Shanghai is a protected. To ensure its serviceability, appropriate retrofitting is necessary. Structural analysis based on the inspection result was performed. It is shown that the bearing capacity or the ductility of some members in the original structure as well as the retrofit proposal are inadequate. Strengthening design was then performed. The effect of the subsequent retrofitting process on the strengthened structure was analyzed. The historical building is then properly protected and the new manufacturing requirements are meet through the retrofitting and strengthening design. The proposed methods can serve as references for relative research or engineering practices.</jats:p
Greenhouse gas emissions and nitrogen removal from wastewater - constructed wetland solutions
No full textSince the Paris Agreement in 2015, total carbon emissions have been controlled. However, greenhouse gas emissions from the wastewater treatment industry have increased almost every year since 2009. Although constructed wetlands have been proposed as a green water treatment technology to address climate challenges, our understanding of their role is still limited. Therefore, we review the research status of greenhouse gases in constructed wetlands and synthesize the current best estimates of their impact on the global greenhouse gas cycle from five perspectives, particularly in the field of wastewater nitrogen cycle. These perspectives include energy self-sufficiency and complete neutralization, their role as a complete ecosystem, the unique advantages compared to other treatment methods, countermeasures in special environments, and future development strategies. We believe that new insights and innovations will promote the practical application of constructed wetlands and potentially achieve complete greenhouse gas neutralization in the wastewater treatment industry
Simultaneous estimation approaches to large-scale multivariate regression
No full textLarge-scale multivariate regression has various applications in machine learning fields, especially in image recognition, gene expression prediction and multivariate time series prediction. Numerous approaches have been developed to solve this problem. Some popular statistical methods are group lasso and multivariate ridge regression. Most existing methods either leverage the information of the error covariance matrix or assume specific parameter structures. However, in practice, this information is not available. To resolve these issues, we start with formulating multivariate regression as a compound decision problem. In Chapter 2, we propose an empirical Bayes-based approach where the prior distribution of unknown parameters is estimated nonparametrically from the data. Unlike existing methods, the proposed method does not assume any structure of parameters. In Chapter 3, we propose a method that linearly shrinks each coordinate of ordinary least squares estimator. Both theoretical and numerical results are available. In Chapter 4, some nonlinear shrinkage methods based on soft threshold operator are also proposed. Taking the advantage of large number of related outcomes, the proposed methods outperform popular existing methods.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-05-01The student, Yihe Wang, accepted the attached license on 2021-03-26 at 14:14.The student, Yihe Wang, submitted this Dissertation for approval on 2021-03-26 at 14:23.This Dissertation was approved for publication on 2021-03-30 at 09:21.DSpace SAF Submission Ingestion Package generated from Vireo submission #16214 on 2021-09-16 at 20:07:51Made available in DSpace on 2021-09-17T04:04:05Z (GMT). No. of bitstreams: 2
WANG-DISSERTATION-2021.pdf: 2631668 bytes, checksum: c6bfd606fee117ce49bf41b6c956ee2d (MD5)
LICENSE.txt: 4206 bytes, checksum: 80e591243bc13266b37bdf9ef92f5193 (MD5)
Previous issue date: 2021-03-30Embargo set by: Seth Robbins for item 118630
Lift date: 2023-09-17T04:04:53Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 118630
Lift date: 2023-09-17T04:07:01Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemAuthor requested closed access (OA after 2yrs) in Vireo ETD systemLimite
Tourism smallholders’ perceived risks, resilience, and response strategies in the upper reaches of the Yihe River, China
No full textRural tourism brings opportunities, risks and challenges to tourism smallholders. Exploring risk management strategies and capacity holds the key to strengthening household livelihood resilience and well-being in tourism-guided rural transition. By linking the sustainable livelihoods framework (SLF) and resilience thinking, a risk resilience framework was developed and employed to explore the nature of risks, levels of risk resilience, response strategies, and their interrelationship by using data from 262 households in the upper reaches of the Yihe River, China. The results showed that the tension between the market environment and low resilience shapes the main risks to the livelihood. There are significant correspondences between risk types and coping strategies. Additionally, perceived risks, livelihood resilience, and market imperfections in rural transformation jointly shaped the preferences of risk-response strategies and their variation among smallholders. The results provide abundant information for a better understanding of response strategies and future resilience building
Beijing Shi jie dao xiang tu /
No full textRelief shown by hachures.Includes insets of Hua bei jiao tong tu, Yihe Yuan ming sheng tu, Beijing Shi fu jian ming sheng tu.Text on verso
Laifoshi denglu Xinjiapo 200 zhounian jinian: Choubei buzhou yu lishi kunjing 莱佛士登陆新加坡200周年纪念：筹备步骤与历史困境 [Bicentennial Commemoration of Raffles' Landing in Singapore: Preparatory Steps and History Dilemmas]
No full textYihe Shiji 怡和世纪 [Yihe Century]366-17Singapor
Water Preservation and Conservation above Coal Mines Using an Innovative Approach: A Case Study
No full textTo better protect the ecological environment during large scale underground coal mining operations in the northwest of China, the authors have proposed a water-conservation coal mining (WCCM) method. This case study demonstrated the successful application of WCCM in the Yu-Shen mining area. Firstly, by using the analytic hierarchy process (AHP), the influencing factors of WCCM were identified and the identification model with a multilevel structure was developed, to determine the weight of each influencing factor. Based on this, the five maps: overburden thickness contour, stratigraphic structure map, water-rich zoning map of aquifers, aquiclude thickness contour and coal seam thickness contour, were analyzed and determined. This formed the basis for studying WCCM in the mining area. Using the geological conditions of the Yu-Shen mining area, the features of caved zone, water conductive fractured zone (WCFZ) and protective zone were studied. The equations for calculating the height of the “three zones” were proposed. Considering the hydrogeological condition of Yu-Shen mining area, the criteria were put forward to evaluate the impact of coal mining on groundwater, which were then used to determine the distribution of different impact levels. Using strata control theory, the mechanism and applicability of WCCM methods, including height-restricted mining, (partial) backfill mining and narrow strip mining, together with the applicable zone of these methods, were analyzed and identified. Under the guidance of “two zoning” (zoning based on coal mining’s impact level on groundwater and zoning based on applicability of WCCM methods), the WCCM practice was carried out in Yu-Shen mining area. The research findings will provide theoretical and practical instruction for the WCCM in the northwest mining area of China, which is important to reduce the impact of mining on surface and groundwater
Beiping Shi quan tu [cartographic material] /
No full text7503141220 : (ISBN). 880-03 Di 1 ban. On the map, each square equals to one square Chinese mile thus the scale of the map is approximately 1:15,000.; Map of Beijing showing main roads, water features, rivers, lakes, parks and city walls. Also shows 6 photos of interesting places of the city.; Series title from dust jacket.; 880-09 Reprint. Original published by Ri xin yu di xue she between 1941 to 1949. Enlarged to 1.30 times the size of original map.; Also available online http://nla.gov.au/nla.map-vn3824332. 880-10 Ancillary maps: Yihe Yuan tu -- Ping Jin Bao yi dai quan tu -- Bei Hai gong yuan tu -- Xi Shan Ming sheng tu -- Gu gong bo wu yuan tu
Beiping Shi quan tu /
No full textIncludes ill.Insets: Bei Hai gong yuan tu -- Gu gong bo wu yuan tu -- Ping Jin bao yi dai quan tu --Yihe Yuan tu -- Xi Shan ming sheng tu -- Dian che lu xian zhan ming tu -- Beiping di mian gong an fen qu tu.LC copy mounted on cloth backing, and stamped at lower right: 398B. DLC
- …
