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欧·亨利短篇小说

on Structural Approach for the Valuation of Credit Risk

丛书名：轻松英语名作欣赏

2007年

作者： o. Henry （美）

0804011204

ISBN: (数字)9787560067551

ISBN: (纸本)7560067557

0804011204

关键词：小说集对照读物英语近代短篇小说美国汉语

来源：畅想之星图书光盘版（南... 评论

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Journal of Mathematics and System Science 2014年第6期4卷 377-386页

作者： o. H. Edogbanya S. E. Fadugba Department of Mathematics Federal University Lokoja Kogi State Nigeria Department of Mathematical Sciences Ekiti State University Ado Ekiti Nigeria

This paper presents structural approach for the valuation of credit risk. Credit risk arises whenever a borrower is expecting to use future cash flows to pay a current debt. It is closely tied to the potential return of investment, the most notable being that the yields on bonds correlate strongly to their perceived credit risk. Structural approach is based on the volatility of the total value of the firm. The credit risk to this measured in a standard way. The random time of default is defined in an intuition way. The default event is linked to the notion of the firm＇s insolvency. This approach is known to generated low credit spreads for corporate bonds close to maturity. It requires a judicious specification of the default barrier in order to get a good fit to the observed spread curves.

关键词： Credit risk structural approach risk-neutral valuation formula

Assessment of Heavy Metal Contaminants Using Pollution Indices in Ankobra River at Prestea Huni-Valley District, Ghana

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Journal of Geoscience and Environment Protection 2019年第9期7卷 25-35页

作者： Austin Asare Benjamin D. Asamoah Peter o. Sanful Department of Environmental Management University of Energy and Natural Resources Sunyani Ghana Department of Chemical Sciences University of Energy and Natural Resources Sunyani Ghana Department of Fisheries and Water Resources University of Energy and Natural Resources Sunyani Ghana

The reliance of communities on River Ankobra as the source of drinking water makes the assessment of its quality very imperative to human health and environmental management. The objective of this work was to investigate the concentration of heavy metal in the Ankobra River sediments at the Prestea Huni-Valley District using pollution indices. Sediments were collected randomly from the bottom of the Ankobra River at four different communities namely: Awodua, Heman, Ankobra and Tarkwa Breman. The presence of a set of heavy metals Fe, Mn, Cd, Pb, Zn, Cu, and Hg in the sediments was determined using Atomic Absorption Spectroscopy (AAS). The results showed that the concentration of Fe, As, and Hg did not differ significantly (p > 0.05) amongst the four communities but significant variation in the levels of Cu, Mn, Cd, Pb, and Zn was found (p ongst the sampling areas. The geo-accumulation index revealed that the communities were not polluted with Cu, Mn, Fe, Pb and Zn. However, all communities except Tarkwa Breman were found to have exceptionally high levels of Cd. The contamination factor results were consistent with the I-geo results. The pollution load index (PLI) showed that the four communities were not polluted with heavy metals. Strong statistical positive relationship were found between Mn and Cu;Cd and Cu;Pb and Mn;Hg and Mn;Zn and Cu;Zn and Mn;Zn and Pb;Zn and Hg whilst As and Fe showed strong negative correlation.

关键词： Heavy Metal Ankobra River Pollution Index Sediment

SYNTHESIS AND PRoPERTIES oF HEPARINIZED PoLYMETHACRYLIC ACID

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中国科学院大学学报(中英文) 1994年第1期 63-69页

作者： Feng Pinzhen Lu Jiantao(Department of Chemistry, Graduate School, Academia Sinica P. o. Box 3908, Beijing 100039)

ＳＹＮＴＨＥＳＩＳＡＮＤＰＲＯＰＥＲＴＩＥＳＯＦＨＥＰＡＲＩＮＩＺＥＤＰＯＬＹＭＥＴＨＡＣＲＹＬＩＣＡＣＩＤ￥ＦｅｎｇＰｉｎｚｈｅｎ；ＬｕＪｉａｎｔａｏ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＧｒａｄｕａｔｅＳ... 详细信息

ＳＹＮＴＨＥＳＩＳＡＮＤＰＲＯＰＥＲＴＩＥＳＯＦＨＥＰＡＲＩＮＩＺＥＤＰＯＬＹＭＥＴＨＡＣＲＹＬＩＣＡＣＩＤ￥ＦｅｎｇＰｉｎｚｈｅｎ；ＬｕＪｉａｎｔａｏ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＧｒａｄｕａｔｅＳｃｈｏｏｌ，ＡｃａｄｅｍｉａＳｉｎ...

关键词： heparin heparinized polymer antithrombogenicity methacrylic acid

Risk level Assessment of the Desalter and Preflash Column of a Nigerian Crude Distillation Unit

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Journal of Materials Science and Chemical Engineering 2019年第11期7卷 31-41页

作者： Henry o. orugba Samuel E. ogbeide Christian osagie Department of Chemical Engineering University of Benin Benin City Nigeria Faculty of Environmental and Natural Sciences Brandenburg University of Technology Cottbus Germany

A study of operability and assessment of the safety level of a crude distillation unit in a Nigerian refinery has been carried out. In a crude distillation unit of a refinery, the desalter and preflash column, as well as their associated pipe works and pumps, are considered to have high-risk factors that can present operability problems and possibly hazardous conditions. Applying the HAZoP methodology, a total of 25 guide words were suitably applied on 4 nodes to study the possible deviations that may occur. The 89 causes of these deviations identified in the study could be classified under human errors and equipment malfunctioning. From the nature of the 46 consequences identified, the plant is likely to experience more of operability problems and less of deadly hazardous scenes. Suitable recommendations that will improve the operability and safety levels of the plant were however presented in the study and presented in tables. If the 61 recommendations given in this study can be incorporated into the design with the few safeguards already present in the original design of the plant, the operability problems of the plant will be greatly minimized and safety level will improve drastically.

关键词： Hazard operability HAZoP Guide Word Nodes Refinery

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工程DWc電XuD之P聯

工程DWc電XuD之P聯

Unlocking quality in endoscopic mucosal resection

2006年

作者：王o春 ... [等] 編

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World Journal of Gastrointestinal Endoscopy 2023年第5期15卷 338-353页

作者： Eoin Keating Jan Leyden Donal B o'Connor Conor Lahiff Department of Gastroenterology Mater Misericordiae University HospitalDublin 7Ireland School of Medicine University College DublinDublin 4Ireland Department of Surgery Tallaght University HospitalDublin 24Ireland School of Medicine Trinity College DublinDublin 2Ireland

A review of the development of the key performance metrics of endoscopic mucosal resection(EMR),learning from the experience of the establishment of widespread colonoscopy quality *** future performance markers for both colonoscopy and EMR are also evaluated to ensure continued high quality performance is maintained with a focus service framework and predictors of patient outcome.

关键词： Endoscopic mucosal resection Colonoscopy Quality in endoscopy Advanced therapeutic endoscopy Large non pedunculated colorectal polyps Key performance indicators

Statistical Properties of The Exponentiated Nakagami Distribution

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Journal of Mathematics and System Science 2014年第3期4卷 180-185页

作者： Adepoju K.A Chukwu A.U and Shittu, o.I Department of Statistics University of lbadan Nigeria.

This paper is an improvement over beta-Nakagami distribution developed by Shittu and Adepoju （2013）. Here we propose the addition of one parameter to the two parameter continuous Nakagami-m distribution （Nakagami, 1960） that was designed for modeling the fading of radio signals. The resulting distribution referred to as Exponentiated Nakagami （ENAK） distribution is a generalization of the classical Nakagami distribution. The statistical properties of the proposed distribution such as moments, moment generating function, the asymptotic behavior among others were investigated. The method of maximum likelihood is used to estimate the model parameters and the observed information matrix is derived. A real data set is used to compare the new model with the class of Nakagami distributions. our findings showed that the Exponentiated Nakagami distribution is more flexible than beta-Nakagami distribution with better representation and less computational effort.

关键词： Nakagami exponentiated Nakagami Beta-Nakagami moments moment generating function

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用固体废料生产建筑材料

用固体废料生产建筑材料