A Spatial Resource Top-K Query Algorithm in Cyber Physical System

2013 ◽  
Vol 774-776 ◽  
pp. 1725-1728
Author(s):  
Wu Bin Ma ◽  
Ming Xing Liu ◽  
Su Deng ◽  
Hong Bin Huang
Keyword(s):  
Physical System ◽  
Empirical Studies ◽  
Index Structure ◽  
Cyber Physical System ◽  
Resource Network ◽  
Spatial Environment ◽  
Uncertain Factor ◽  
Retrieving Algorithm ◽  
Physical Elements ◽  
Query Algorithm

Cyber physical system (CPS) mainly means that the conjoining of information and physical resources. The physical elements, which could be treated as spatial resources, need be queried through information field. The key problem is how to construct spatial resource index structure and accordingly retrieving algorithm. The spatial retrieving algorithm is widely used in the Internet and moving object. The traditional spatial resource retrieving algorithms ignore the uncertain factor of the spatial resource, which is the important feature of the military resource network. This paper use an index structure named BIR-tree, based on the belief of resource, we also propose corresponding efficient and accurate top-k retrieving algorithm. On the base of traditional IR-tree, we define the resource and regional belief aiming at special spatial environment. The results of our empirical studies with an implementation of the proposed algorithm show it is capable of excellent performance.

Applications of Cyber-Physical System: A Literature Review

2017 ◽  
Vol 02 (03) ◽  
pp. 1750012 ◽  
Author(s):  
Hong Chen
Keyword(s):  
Literature Review ◽  
Physical System ◽  
Physical World ◽  
Cyber Physical System ◽  
Extensive Review ◽  
System A ◽  
Scopus Database ◽  
Physical Elements ◽  
Communication Control ◽  
New Generation

Cyber-Physical System (CPS), a new generation of digital system, mainly focuses on complex interdependencies and integration between cyberspace and physical world. A CPS is composed of highly-integrated computation, communication, control, and physical elements. CPS is currently of interest in academia, industry, and government. However, a systematic and extensive review of research on CPS is not available. As such, this paper conducts an expanded literature review on applications of CPS by examining existing literatures from 2012 to 2017 in Scopus database. Specifically, 77 papers studying applications of CPS are grouped into 10 categories and reviewed. The contents of the papers in each research category are summarized. The challenges and trends of research on CPS are illustrated as well.

Implementation of a Cyber-Physical System Using Wireless Sensor Networks for Monitoring Patients

2015 ◽  
Vol 1 ◽  
pp. 26 ◽  
Author(s):  
Vo Que Son ◽  
Do Tan A
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Physical System ◽  
Patient Monitoring ◽  
High Reliability ◽  
Vital Signs ◽  
Wireless Sensor ◽  
Cyber Physical System ◽  
Self Administration ◽  
Hospital Units

Sensing, distributed computation and wireless communication are the essential building components of a Cyber-Physical System (CPS). Having many advantages such as mobility, low power, multi-hop routing, low latency, self-administration, utonomous data acquisition, and fault tolerance, Wireless Sensor Networks (WSNs) have gone beyond the scope of monitoring the environment and can be a way to support CPS. This paper presents the design, deployment, and empirical study of an eHealth system, which can remotely monitor vital signs from patients such as body temperature, blood pressure, SPO2, and heart rate. The primary contribution of this paper is the measurements of the proposed eHealth device that assesses the feasibility of WSNs for patient monitoring in hospitals in two aspects of communication and clinical sensing. Moreover, both simulation and experiment are used to investigate the performance of the design in many aspects such as networking reliability, sensing reliability, or end-to-end delay. The results show that the network achieved high reliability - nearly 97% while the sensing reliability of the vital signs can be obtained at approximately 98%. This indicates the feasibility and promise of using WSNs for continuous patient monitoring and clinical worsening detection in general hospital units.

Grid Cyber-Physical System Risk Management Model Based on Cooperative Game Theory

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Cunbin Li ◽  
Ding Liu ◽  
Yi Wang ◽  
Chunyan Liang
Keyword(s):  
Game Theory ◽  
Risk Management ◽  
Cooperative Game ◽  
Physical System ◽  
Cooperative Game Theory ◽  
Power Grid ◽  
Management Model ◽  
Cyber Physical System ◽  
Model Based ◽  
Generation Power

AbstractAdvanced grid technology represented by smart grid and energy internet is the core feature of the next-generation power grid. The next-generation power grid will be a large-scale cyber-physical system (CPS), which will have a higher level of risk management due to its flexibility in sensing and control. This paper explains the methods and results of a study on grid CPS’s behavior after risk. Firstly, a behavior model based on hybrid automata is built to simulate grid CPS’s risk decisions. Then, a GCPS risk transfer model based on cooperative game theory is built. The model allows decisions to ignore complex network structures. On this basis, a modified applicant-proposing algorithm to achieve risk optimum is proposed. The risk management model proposed in this paper can provide references for power generation and transmission decision after risk as well as risk aversion, an empirical study in north China verifies its validity.

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