منابع مشابه
Return of naturally sourced Pb to Atlantic surface waters
Anthropogenic emissions completely overwhelmed natural marine lead (Pb) sources during the past century, predominantly due to leaded petrol usage. Here, based on Pb isotope measurements, we reassess the importance of natural and anthropogenic Pb sources to the tropical North Atlantic following the nearly complete global cessation of leaded petrol use. Significant proportions of up to 30-50% of ...
متن کاملEstimation of Return to Scale under Weight Restrictions in Data Envelopment Analysis
Return-To-Scale (RTS) is a most important topic in DEA. Many methods are not obtained for estimating RTS in DEA, yet. In this paper has developed the Banker-Trall approach to identify situation for RTS for the BCC model "multiplier form" with virtual weight restrictions that are imposed to model by DM judgments. Imposing weight restrictions to DEA models often has created problem of infeasibili...
متن کاملPlace Research and Return to Sport: An Analysis of the Aesthetic Role and the Tendency of Customers to Sport
The present study investigates the role of aesthetic dimensions of the place and the tendency of costumers to the sport in physical fitness and aerobics clubs in Mashhad. The research method was descriptive-correlational and the statistical population consisted of customers of Mashhad fitness and aerobics clubs. Considering correlational studies, 250 persons were selected (randomly) as the samp...
متن کاملAn Additive Model for Estimation Return to Scale in Regulated Environment with Quasi-Fixed Inputs in Data Envelopment Analysis (DEA)
The measurement of RTS amounts measures a relationship between inputs and outputs in a production structure. There are many different ways to calculate RTS in primal or dual space. But in more realistic cases, governments usually intervene on DMU’s behavior as regulatory agency, this clearly represent a set of limitations and restrictions on behaviors of DMUs, So very few decisions in DMUs are ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Hyomen Kagaku
سال: 2008
ISSN: 0388-5321,1881-4743
DOI: 10.1380/jsssj.29.517