Results 41 to 50 of about 49,363 (264)
مدیریت فشار در شبکه‌های توزیع آب با استفاده از سامانه‌های اطلاعات مکانی و پایگاه داده مکانی متن باز (مطالعه موردی: شهرک گلستان شیراز) [PDF]
آب و توسعه پایدار, 2018 یکی از مشکلات موجود در سطح شرکت های آب و فاضلاب مدیریت فشار در شبکه های توزیع آب است. با توجه به ارتباط مستقیم بین فشار شبکه و میزان مصارف مشترکین، مدلسازی توزیع مکانی فشار در نرم افزارهای هیدرولیکی قابل انجام است؛ ولی به علت مکان مرجع بودن داده های
غلامرضا فلاحی +1 more
doaj +1 more source
PASE: PostgreSQL Ultra-High-Dimensional Approximate Nearest Neighbor Search Extension
SIGMOD Conference, 2020 Similarity search has been widely used in various fields, particularly in the Alibaba ecosystem. The open-source solutions to a similarity search of vectors can only support a query with a single vector, whereas real-life scenarios generally require a ...
Wen Yang, Tao Li, Gai Fang, Hong Wei
semanticscholar +1 more source
Fault diversity among off-the-shelf SQL database servers [PDF]
, 2004 Fault tolerance is often the only viable way of obtaining the required system dependability from systems built out of "off-the-shelf" (OTS) products.
Gashi, I., Popov, P. T., Strigini, L.
core +1 more source
Astronomical data fusion tool based on PostgreSQL [PDF]
Research in Astronomy and Astrophysics, 2016 9 pages, 3 figures, 3 tables, accepted by Research in Astronomy and ...
Yongheng Zhao +3 more
openaire +4 more sources
Benchmarking database systems for Genomic Selection implementation [PDF]
, 2019 Motivation: With high-throughput genotyping systems now available, it has become feasible to fully integrate genotyping information into breeding programs.
Guignon, Valentin +10 more
core +2 more sources
Труды Института системного программирования РАН, 2018 In this paper we consider multidimensional indexing with the additional constraint of lexicographical ordering. In order to deal with this problem we discuss two well-known tree data structures: R-tree and B-tree.
P. V. Fedotovsky +4 more
doaj +1 more source
User's and Administrator's Manual of AMGA Metadata Catalog v 2.4.0 (EMI-3) [PDF]
, 2013 User's and Administrator's Manual of AMGA Metadata Catalog v 2.4.0 (EMI ...
Hwang, Soon Wook
core +1 more source
Deep Reinforcement Learning for Join Order Enumeration
, 2018 Join order selection plays a significant role in query performance. However, modern query optimizers typically employ static join enumeration algorithms that do not receive any feedback about the quality of the resulting plan.
Aboulnaga A. +7 more
core +1 more source
The OTree: multidimensional indexing with efficient data sampling for HPC [PDF]
, 2019 Spatial big data is considered an essential trend in future scientific and business applications. Indeed, research instruments, medical devices, and social networks generate hundreds of petabytes of spatial data per year.
Becerra Fontal, Yolanda +8 more
core +1 more source
Neo: A Learned Query Optimizer
, 2019 Query optimization is one of the most challenging problems in database systems. Despite the progress made over the past decades, query optimizers remain extremely complex components that require a great deal of hand-tuning for specific workloads and ...
Alizadeh, Mohammad +7 more
core +1 more source