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This paper investigates the consensus problem of a class of multi-agent systems with switching and undirected topologies subjected to external disturbances. By model transformation, the consensus problem is changed into the energy-to-peak control of a reduced-order closed-loop system. Then, with the aid of graph theory, Lyapunov stability theory and some decoulping techniques, a new LMI-based method...
This paper deals with the problem of observer-based control for stochastic multi-agent systems with time-delay. The aim is to design a controller such that the system asymptotically reaches global consensus in mean square. By constructing an appropriate Lyapunov-Krasovskii functional and using an effective decoupling method, a sufficient condition in the form of LMIs for ensuring the existence of...
Point function secret sharing(PFSS)was a special kind of function secret sharing(FSS)that was a special case of secret sharing, that the shared secret was a point function instead of a value. Motivated by the reason that the PFSS has very good application in the secure multi-party computations by investigating, and the existing PFSS scheme without threshold and inefficient. A new (t, p)–PFSS scheme...
Location-based Services (LBS) are a kind of important applications which identify the resources close to users, i.e. return the nearest gas stations, restaurants, banks etc, as well as identification of the optimal route to reach destination according to user position. However, privacy threat is the inherent problem in LBS as the location data is very effective for service provisioning. Thus, we focus...
The problem of sampled-data $\mathcal {L}_{2}-\mathcal {L}_{\infty }$ consensus control for the multi-agent systems with nonlinear dynamics and external disturbances is investigated via dynamic output feedback (DOF) strategy. Both the control input and the measured output are sampled. By employing the input/output delay approach, the multi-agent system with sampled-data DOF control protocol is transformed...
A wireless communication of LED (light emitting diode) street lamps is studied based on ZigBee protocol working with 2.4GHz. The experiment is done between two nodes of wireless LED street lamps, and the result shows that PER is blow 1% when their distance is less than 43m which satisfies the requirement of wireless network of LED street lamps.
The previous electronic sealed-bid auction schemes usually have a common drawback, the third party (auction host) can conspire with a malicious bidder to leak all bidding prices before the opening stage. It results in the malicious bidder wining the auction with an optimal bidding price. This paper proposes a sealed-bid auction scheme without third party to get over this drawback. The proposed scheme...
The CSNS (China Spallation Neutron Source) RCS (rapid cycling proton synchrotron) RF (Radio Frequency) remote control system is a DCS (distributed control system) system based on the EPICS (Experimental Physics and Industrial Control System). This system is used to remotely control and monitor the accelerating cavities and their accessory equipments of the rapid cycling proton synchrotron (RCS) for...
In this paper, we consider group consensus problem with switching topology by giving a kind of new protocol in which communication graph weights are all nonnegative. This is also consistent with classic protocols. The sufficient conditions which group consensus under this kind of protocols can reach for both single and second order multi-agent system are obtained. Finally, numerical examples are given...
Central utility services are increasingly networked systems that use an interconnection of sensors and programmable logic controllers, and feed data to servers and human-machine interfaces. These systems are connected to the Internet so that they can be accessed remotely, and the network in these plants is structured according to the SCADA model. Although the physical systems themselves are generally...
Wireless sensor networks are a new type of networked systems, characterized by severely constrained computational and energy resources, and an ad hoc operational environment. When wireless sensor networks are deployed in a hostile terrain, security becomes extremely important, as they are prone to different types of malicious attacks. Due to the inherent resource limitations of sensor nodes, existing...
It is widely known that in wireless sensor networks (WSN), energy efficiency is of utmost importance. WSN need to be energy efficient but also need to provide better performance, particularly latency. A common protocol design guideline has been to trade off some performance metrics such as throughput and delay for energy. This paper presents a novel MAC (Express Energy Efficient Media Access Control)...
Taking the Solar Sail System combined by building construction and photovoltaic generation for example, this paper designs Solar Photovoltaic Remote Data Transmission System based on GPRS which completes data receiving, processing and evaluation indicators' calculation. The framework, composition and communication protocol of the active energy transmission were discussed in detail. The design of Data...
To resolve real-time the traditional water quality detection method, a novel system of remote water quality measuring and monitoring based on wireless sensor network (WSN) and Code Division Multiple Access (CDMA) technology is proposed. The WSNs can monitor the targets and water quality information of the waters through the cooperation of a large amount of sensors. The optimization of node distribution...
The collision-free optic-burst network (CORNet) was proposed in order to avoid the channel collision in OBS ring network. The CORNet employs the multi-token access control algorithm (MACA) to solve the channel collision problem. The MACA protocol uses multiple tokens to manage the accessibility of all data wavelengths and the tokens are synchronously transmitted around the ring. However, the MACA...
In unstructured P2P file sharing systems, the ununiform distribution of file popularity causes damage to the usability of the system. The search for rare files has more chance to fail. Flooding algorithm with indices which are exchanged randomly based on gossip protocol provides a success guarantee in a probability sense. However, the problem of low success rate and large numbers of messages still...
How to manage local area network (LAN) scientifically and effectively is an important question in remote control area. Remote control to the computers in LAN could relieve the network administrators of some of trivial works and improve the efficiency. This paper introduces the design and implementation of an intelligent, real-time controlling management system which has already been deployed in real...
Heartbeat mechanism is the most effective technology to achieve the reliable communication of the High Availability (HA) system. But most of the traditional heartbeats are implemented in the application layer. This kind of method may cause detection instability while the scheduling and load are changed and thereby influence the detection efficiency of failure detection. To tackle those problems, this...
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