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Method for building distributed time-space multidimensional index system for mobile medical services

A mobile medical and indexing system technology, applied in the field of data indexing, can solve the problems of complexity, the efficiency and scalability of spatiotemporal indexing are not simple, and achieve the effect of improving satisfaction and meeting high concurrency requirements.

Active Publication Date: 2018-06-12
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, improving the efficiency and scalability of spatio-temporal indexes is not straightforward
Therefore, distributed index calculations face very challenging problems, such as sequential calculations and complex indexes and support for query types, etc.

Method used

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  • Method for building distributed time-space multidimensional index system for mobile medical services
  • Method for building distributed time-space multidimensional index system for mobile medical services
  • Method for building distributed time-space multidimensional index system for mobile medical services

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: The present invention provides a distributed spatio-temporal multi-dimensional index method for mobile medical services to improve the efficiency of medical services and make full use of medical resources. The invention also improves the shortcomings of the query method in the prior art to improve accuracy and real-time performance, thereby realizing multi-dimensional indexing.

[0022] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: Firstly, the research and overview of the present situation of the distributed indexing method are carried out. Then, a new distributed efficient indexing method is proposed, which allows spatio-temporal high-dimensional indexing of mHealth resources in a distributed environment. Third, carry out big data experiments, which strongly prove the effectiveness and scalability of the indexing method, and also prove that the method can effectively support time and space q...

Embodiment 2

[0037] Embodiment 2: Study the factors affecting the performance of the algorithm through experiments. Mainly, in-depth experiments are conducted to evaluate the state-of-the-art spatial algorithms for IDI and to study IDI in detail. We first introduce the details of the experimental setup, including datasets, default parameters, and system environment, then evaluate the performance and analyze the experimental results.

[0038] (1) Setup and configuration: Build a server cluster with 32 servers. Each server is composed of dual-core AMD2.0GHz CPU, 73GB SCSI hard disk and 8GB memory, and Ubuntu10.10 server operating system and hadoop1.2 are installed. Each slave node cluster runs a TaskTracker and DataNode maintenance process runs. The DFS block default size is 64MB. Apply both solutions on the same cluster of nodes. In the experiment, the Real Data Set (RDS), Dalian's medical vehicle GPS dataset, including 110 systems of medical ambulances and traffic conditions in the cit...

Embodiment 3

[0042] Embodiment 3: The efficiency of index creation is significantly improved: firstly, the efficiency of constructing MRITS, MRIV, MRTree and MRV indexes is evaluated by changing the number of cluster nodes from 2 to 32. refer to Figure 6 , which illustrates the impact of node data changes on the index construction time of RSD and SDS datasets. These three index structures increase almost linearly as the cluster nodes grow. However, the construction time of MRITS is the shortest compared to the number of nodes of MRIV, MRtree and MRV. Especially when the number of nodes is 8 and 16, MRITS is 50% faster than MRIV, 6 times faster than MRTree, and 4 times faster than MRV. This is because on the basis of the existing medical area, the time-space index of the inverted medical area is directly divided, no pre-calculation is required, and only the grid indexing process is required. The index structure based on R-tree and Voronoi requires a complex construction process. Due to...

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Abstract

The invention relates to a method for building a distributed time-space multidimensional index system for mobile medical services, belongs to the field of data index, and aims to achieve multidimensional index. According to the technical scheme, the method is characterized by including: a time-space multidimensional index system is stored with multiple instructions which are suitable for being loaded and executed by a processor; grid index based on the area center is built; inverted time-space double indexes are built, and the inverted time-space double indexes comprise inverted time index andinverted space index. Due to the fact that Skyline inquiry is in a multi-result-set form, the relatively optimal medical service resource can be delivered to a patient as long as the data set is notempty, empty inquiry result is avoided, and user satisfaction degree is increased greatly.

Description

technical field [0001] The invention belongs to the field of data indexing, and relates to a method for establishing a distributed time-space multidimensional index for mobile medical services. technical background [0002] Mobile medical services have great prospects. It not only makes full use of medical resources, but also relieves the pressure on social medical services and meets the medical needs of patients. It is rapidly becoming a new application prospect in the medical field. Mobile medical services are generally regarded as a typical representative of the Internet + smart medical field, which is a combination of private and public medical service models. How to improve the efficiency of medical services and how to make full use of medical resources has always been a concern of the community. [0003] The traditional indexing approach is to perform a linear or continuous scan of the entire connected mHealth resources in order to find the appropriate resources that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G16H40/20
CPCG06F16/2228G06F16/283
Inventor 汪祖民季长清秦静武晓霞
Owner DALIAN UNIV
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