Results 51 to 60 of about 165,392 (160)

An Efficient Text Interval Hot Word Query Algorithm [PDF]

Jisuanji gongcheng, 2018
Text interval hot word query is based on user-specified query time range,it extracts from the text data hot words.Existing hot words extraction algorithm is generally oriented to mining tasks,which has a high time complexity and is difficult to be ...
ZHAO Zhizhou,LU Chang,HE Zhenying,WANG Xiaoyang
doaj  

Monitoring Moving Queries inside a Safe Region

The Scientific World Journal, 2014
With mobile moving range queries, there is a need to recalculate the relevant surrounding objects of interest whenever the query moves. Therefore, monitoring the moving query is very costly.
Haidar Al-Khalidi, David Taniar, John Betts, Sultan Alamri   +3 more
doaj   +1 more source

A Range Query Scheme for Spatial Data with Shuffled Differential Privacy

Mathematics
The existing high-dimensional or multi-dimensional geographic spatial datasets have a large amount of data. When third-party servers collect and publish them, privacy protection is required to prevent sensitive information from being leaked.
Kaixuan Li, Hua Zhang, Yanxin Xu, Zhenyan Liu   +3 more
doaj   +1 more source

Secure and Efficient Cluster-Based Range Query Processing in Wireless Sensor Networks

Journal of Electrical and Computer Engineering, 2018
In wireless sensor networks, preserving privacy is more important and has attracted more attentions. Protecting data and sensor privacy while collecting and computing query results is a challenge.
Liming Zhou, Yingzi Shan, Lu Chen
doaj   +1 more source

Differential Privacy via Haar Wavelet Transform and Gaussian Mechanism for Range Query. [PDF]

Comput Intell Neurosci, 2022
Chen D, Li Y, Chen J, Bi H, Ding X.
europepmc   +1 more source

SharK: Enabling High-Performance Range Queries in Key-Value Store Through Vlog Resharding

IEEE Access
Modern key-value stores often utilize Log-Structured Merge Trees (LSM-trees) to achieve high write throughput. However, LSM-trees inherently suffer from high read and write amplification.
Naoto Sugiura, Daichi Fujiki
doaj   +1 more source

The Reverse Problem of Range Query

Electronic Notes in Theoretical Computer Science, 2003
AbstractWe design an efficient algorithm for the reverse problem of the two-dimensional range query. In the range query problem, we specify a range of a rectangular shape in a given (n,n) array, and count the number of points in the range. If the points have weights, we compute the sum of the weights in the range.
openaire   +1 more source

The Range 1 Query (R1Q) Problem

Theoretical Computer Science, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Michael A. Bender, Rezaul Alam Chowdhury, Pramod Ganapathi, Samuel McCauley, Yuan Tang   +4 more
openaire   +4 more sources

Energy-efficient and privacy-preserving spatial range aggregation query processing in wireless sensor networks

International Journal of Distributed Sensor Networks, 2019
The existing privacy-preserving aggregation query processing methods in sensor networks rely on pre-established network topology and require all nodes in the network to participate in query processing.
Liang Liu, Zhenhai Hu, Lisong Wang
doaj   +1 more source

PixelQuery: Efficient Distance Range Join Query Technique for Visualization Analysis

ISPRS International Journal of Geo-Information
A distance range join query (DRJQ) is a fundamental and critical operation in spatial database queries. It identifies geographic elements within specified distance ranges.
Bo Pang, Zebang Liu, Wei Xiong, Mengyu Ma   +3 more
doaj   +1 more source