نتایج جستجو برای: data

تعداد نتایج: 2410153  

The growing amount of information that has arisen from emerging technologies has caused organizations to face challenges in maintaining and managing their information. Expanding hardware, human resources, outsourcing data management, and maintenance an external organization in the form of cloud storage services, are two common approaches to overcome these challenges; The first approach costs of...

Reza Kazemi Matin, Roza Azizi

In the classical data envelopment analysis (DEA) models, inputs and outputs are assumed as known variables, and these models cannot deal with unknown amounts of variables directly. In recent years, there are few researches on handling missing data. This paper suggests a new interval based approach to apply missing data, which is the modified version of Kousmanen (2009) approach. First, the prop...

Over the last 20 years, and particularly with the advent of Big Data and analytics, the research area around Data and Information Quality (DIQ) is still a fast growing research area. There are many views and streams in DIQ research, generally aiming at improving the effectiveness of decision making in organizations. Although there are a lot of researches aimed at clarifying the role of BIG data...

G Tohidi S Razavyan

This paper introduces discretionary imprecise data in Data Envelopment Analysis (DEA) and discusses the efficiency evaluation of Decision Making Units (DMUs) with non-discretionary imprecise data. Then, suggests a method for evaluation the efficiency of DMUs with non-discretionary imprecise data. When some inputs and outputs are imprecise and non-discretionary, the DEA model becomes non-linear ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور استان مازندران - دانشکده ادبیات و علوم انسانی 1390

به منظور بررسی تاثیر ویزگیهای درون شرکتی بر اهرم مالی در شرکتهای پذیرفته شده در بورس اوراق بهادار تهران 52 شرکت فعال از سال1383 تا1387 در بورس اوراق بهادار تهران به عنوان نمونه انتخاب گردیده است.برای انجام اینکار از ترکیب داده های مقطعی و سری زمانی (داده های تلفیقی ) استفاده میشود. به اینصورت که با استفاده از متدولوزی داده های تلفیقی (panel data) رابطه بین متغیرها ارزیابی و آزمون میشود و برای ب...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت معلم تهران 1381

‏‎the purpose of the present study was to investigate the latent pattern underlying reading ability . some 272 male and female participants. english majors at the ba level , participated in the study. two valid tests were used in this study, the reading test developed exclusively for the purpose of this project and academic reading section of ielts. to investigate the possible latent underlying...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده اقتصاد و حسابداری 1392

این پژوهش با هدف بررسی تاثیر صنعت بانکداری بر بهبود فضای کسب و کار در کشورهای منتخب توسعه یافته و در حال توسعه طی سال های 2008 تا 2012 صورت گرفته است. رتبه فضای کسب و کار که از طریق شاخص های 10گانه مطرح در بانک جهانی بدست می آید، بعنوان متغیر وابسته در نظر گرفته شده است. ضریب نفوذ بانکداری و ضریب تراکم بانکداری، متغیرهای مستقل مدل در نظر گرفته شده اند. برای بررسی فرضیه های پژوهش از مدل پانل دیت...

Journal: Desert 2018

After collecting data, in researches, the type of data distribution must be determined; since any analysis requires the distribution of its own data. Soil properties, such as salinity, are also the same case. Due to its direct and indirect effects on plant growth, soil salinity is an important feature that has always been investigated in agriculture and natural resources, leading to a lot of re...

Data envelopment analysis (DEA) is an approach to measure the relative efficiency of decision-making units with multiple inputs and multiple outputs using mathematical programming. In the traditional DEA, it is assumed that we know the input or output role of each performance measure. But in some situations, the type of performance measure is unknown. These performance measures are called flexi...

ژورنال: اندیشه آماری 2015

In many diverse scientific fields, the measurements are directions. For instance, a biologist may be measuring the direction of flight of a bird or the orientation of an animal. A series of such observations is called ”directional data”. Since a direction has no magnitude, these can be conveniently represented as points on the circumference of a unit circle centered at the origin or as unit ...

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