نتایج جستجو برای: system nested
تعداد نتایج: 2255717 فیلتر نتایج به سال:
Background and objective: The nested case-control study has become popular as an efficient alternative to the full-cohort design. This study compares the results of a nested case-control analysis approach with the full cohort analysis. Methods: A cohort of 276 subjects (new cases from a TB registry) was used for this study. Cox Regression model was used for the full cohort analysis. In orde...
Batch services are a new approach to distributed computation in which clients send batches of operations for execution on a server and receive hierarchical results sets in response. In this paper we show how batch services provide a simple and powerful interface to relational databases, with support for arbitrary nested queries and bulk updates. One important property of the system is that a si...
ارزش لرزه ای مهاربند nestedi در مدل هشتاد طبقه 4.47 برابر بیشتر از قاب خمشی و 4.17 برابر بیشتر از مهاربند ضربدری است که نشان می دهد در بارهای جانبی رفتار بهتری نسبت به آن ها دارد. ارزش لرزه ای در تمام مدل های چهار، هشت، پنجاه و هشتاد طبقه مهاربندهای ogird و nested بیشتر از دیگر مدل ها بوده است که نشان رفتار مناسب لرزه ای آن ها است. بررسی و مقایسه های انجام شده روی مهاربندهای جدید ogrid و nested...
We investigate the relationship between the nested organization of mutualistic systems and their robustness against the extinction of species. We establish that a nested pattern of contacts is the best possible one as far as robustness is concerned, but only when the least linked species have the greater probability of becoming extinct. We introduce a coefficient that provides a quantitative me...
Arjuna is a fault tolerant distributed system supporting nested atomic actions (nested atomic transactions) that are used for controlling operations on objects (instances of C++ classes). Objects are long lived entities (persistent) and are the main repositories for holding system state; they are also the units of replication for increasing availability. This paper describes the design and impl...
In this poster, we introduce the mechanism of handling the ordering structure of XML data by using the Nested Relational Sequence Database System (NRSD), which is built upon the Nested Relational Sequence Model (NRSM) we developed earlier on. We demonstrate that the storing and querying of XML data are desirable over an NRS relation, which we incorporate an index system into the NRSD. Our preli...
In this paper, we present the design and the architecture of a parallel main memory database management system. We focus on concurrency control scheme and recovery. Our prototype is based on the concept of “database actors”, an object-oriented data model well suited for parallel manipulations. The storage sub system is built upon distributed Ram-files using SDDS (Scalable Distributed Data Struc...
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