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Security vulnerabilities in industrial control systems (ICS) and its open interconnected trends lead to security risks escalating. The existed security protection technologies, with poor applicability, are hard to meet the special requests of information security for ICS. In this paper, trusted protection theories and technologies for ICS were studied and an integrated trusted protection model was...
Forest fire is caused by burning weeds in the field or burning paper as sacrificial offerings in the graveyard, so that the forest fire early warning system is designed and developed with GIS and WSNs. A number of sensor nodes which constitutes the Wireless sensor networks were developed in the region which can measure the concentration of CO and smog and detect flame and gauge the temperature and...
Most recent distributed file systems have adopted architecture with an independent metadata server cluster. However, potential multiple hotspots and flash crowds access patterns often cause a metadata service that violates performance Service Level Objectives. To maximize the throughput of the metadata service, an adaptive request load balancing framework is critical. We present a distributed cache...
Rolling element bearings are widely used in various rotary machines. Accordingly, a reliable bearing fault detection technique is critically needed in industries to prevent these machines' performance degradation, malfunction, or even catastrophic failures. Although a number of approaches have been reported in the literature, bearing fault detection, however, still remains a very challenging task...
Nowadays, Wireless Sensor Network (WSN) is becoming a hot topic after the "Sensor China" concept proposed in 2009. Sensor nodes are deployed in a hostile or unattended environment to collect the data information. Therefore, network security has become a big problem. A new key management scheme of security network architecture for wireless sensor network is presented in this paper. The proposed...
In the research of locating sudden acoustic emission source the transducers are generally arranged in special geometries in order to derive the equations which give acoustic emission source location, and to make the calculations simple. In this paper a new method for locating plane acoustic emission source is proposed by setting the transducers in a straight line. This method makes the arrangement...
In recent years, energy and environment issues are becoming more and more serious. As a country like China with largest architectural area in the world, it is especially significant to develop renewable energy in replacing conventional energy and practicing building energy consumption. Nowadays, the renewable energy software cannot analyze data for monitoring and forecasting. Thus, based on Visual...
It is quite difficult to acquire criterion knowledge for the condition monitoring and fault diagnosis in machinery. The traditional approach depends on constant summary of experiences from the experts. However, the acquired knowledge is probably inaccurate and inefficient. With the benefit of network, the different companies and users that have the same equipments can be organized to form an integrated...
In this paper, we present AdaptSens: a reliable data collection and storage system for solar-powered sensor networks. Unlike battery-operated devices, solar-powered systems have a less predictable energy supply and their ability to harvest energy depends on past spending, thereby creating incentives for adaptive matching of energy supply and demand. Our storage system is novel in its layered architecture...
In order to optimize the performance of the steam turbine unit performance monitoring system, improve the reliability, stability and accuracy of the system, a new idea to establish target value surface and coal consumption growth surface in different load is presented. Take an imported supercritical steam turbine unit, which capacity is 600 MW, as an example to expound the design idea, the mathematic...
RACNet is a sensor network that monitors a data center's environmental conditions at high temporal and spatial resolutions. The data RACNet collects can improve the energy efficiency of data centers, currently one of the fastest growing energy consumers in the U.S. RACNet overcomes the challenge of reliable and low-latency data gathering from dense networks deployed in harsh RF environments through...
In order to implement concurrency control of three dimension CAD product in real-time cooperative design, a conflict resolution strategy that combines the services of object ownership management and time management in high level architecture (HLA) with datapsilas dynamic locked was proposed, meanwhile, the federates with different authorities and functions were defined and a distributed virtual design...
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