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The new generation intelligent park is demanded for the flexible utilization mode of distributed renewable energy, energy storage equipment and the various characteristic load access. However, the energy router is correspondingly responsible for energy routing and dynamic control. Its uniform interface supports the plug and play of distributed power, energy storage and load of the intelligent park...
In this paper, we design a novel two-channel sphygmus monitoring system, which can synchronously measure the pulse signals and their difference one from radial artery and ulnar artery. This system uses the CM-01B vibration sensor as a sphygmus sensor, utilizes the WiFi module to transmit data, makes use of the PC software to process and display real-time data of sphygmus. The pint-sized and portable...
A high-resolution FBG sensor is proposed for crust deformation observation and earthquake monitoring. A narrow-linewidth tunable fiber laser is used to interrogate the FBG. The wavelength shift of the FBGs due to seismic signal is measured by swept optical suppressed carrier single sideband (SSB-SC) interrogation technique with a reference FBG. The self-noise level is tested to be lower than NHNM...
Unintended smartphone rebooting and unexpected shutdown (due to reasons like battery run outs, overheating, or automatic app upgrades) is annoying. What can be even worse is that a phone user commonly has to restart, from the very beginning, the apps he or she is using when the phone gets rebooted, because all the app states would be lost, especially when the number of apps in use is large. Hence,...
The utilization of cloud computing resources contributes to a fast growth of e-business and e-government where businesses and government agencies often require processing a large volume of service requests in a constrained period of time. In order to achieve on-time completion of a large volume of time-constrained parallel processes, this paper proposes a novel dynamic checkpoint selection strategy...
A fiber optic seismometer based on π-phase-shifted FBG (π-FBG) is proposed. The static wavelength/strain of the π-FBG is measured by swept optical suppressed carrier single sideband (SSB-SC) interrogation technique with a reference FBG resonator. A broadband (DC-50 Hz) wavelength/strain with 0.0006 pm (0.47 nε) resolution is demonstrated. As a reasonable double-diaphragm acceleration model is realized,...
A key constraint of REST API is that all the resources must be reachable by some hyperlink paths from an entry point. However, to apply this constraint without prudence can result in excessive hyperlinks that do not provide new services but increase the dependence between the resources. Excessive hyperlinks are difficult to identify because: 1) a REST API can have dynamic and unbounded paths, and...
In the year of 2014, Beijing hosted the 22nd annual APEC Economic Leader's Meeting. To improve the air quality during the meeting, the government had taken various actions to reduce the pollution emission in the region. The pollution caused by particulate matter less than 2.5µm (PM2.5) is one of the biggest environmental threats in Beijing. Given the magnitude of the control measures that were taken...
Rail transit is a typical Cyber-physical Systems (CPS). The study of urban rail transit CPS was carried out with the introduction of CPS into the urban rail transit system. Based on the analysis of CPS, the fundamental architecture of urban rail transit CPS was designed and the functions of corresponding layers were explained. The system model of urban rail transit CPS was proposed. The functions...
In order to handle the problem of nonstationary and random nature of data in the process industry, an improved multiscale principal component analysis is proposed, which contains different noises inevitably. Firstly, an improved wavelet threshold denoising method which combines multiple wavelet transform with a new threshold function based on the characteristics of wavelet analysis is proposed. The...
Currently, most of the existing intelligent lighting control system uses the wired network, which not only has the complex construction and bad flexibility, but also influences the application of the intelligent lighting. For this reason, an intelligent lighting control system, combining ZigBee with GPRS is put forward in this paper. It can not only reduce the system cost, but also greatly enhance...
operation state monitoring of equipment is vital to ensure reliable operation in nuclear power plant (NPP). Wireless sensor network can reduce monitoring cost, enlarge monitoring range, and improve monitoring quality, and relay nodes placement is a fundamental way to form efficient and reliable wireless sensor network. Current placement research do not consider NPP special problems, such as obstacles...
This paper is an introduction to software performance automated testing and theory. It introduces the features of Open Xml storage and SQL Server storage. Then this paper sets three state scenes and chooses different test automated tools respectively. Finally, it uses tools to monitor software performance index from these two data storage systems. Results are then analyzed, comparing the quality performance...
Aiming at the issue of slow operating speed, low real-time character and unsuitability on looking for the source of the harmonic which is the traditional power quality monitor system based on single chip Microprocessor (SCM), this paper designs a new one based on DSP. Analyzing from the hardware and software designed, it present the principle of clamp type Hall sensor and adopts the improved fast...
This paper proposes a design scheme of a sensor network based on M-Bus, according to the communication protocol and characteristics of M-Bus, and developed the special master/slave interface circuit of M-Bus. The sensor network is intrinsically safe, low power consumption, bus-powered, plug and play, and easy for system expansion. The sensor network is suitable for monitoring system which have numerous...
By utilizing EOS/MODIS satellite remote sensing data and surface soil moisture observation data, and on the basis of topography of Liaoning Province, rainfall distribution, and the frequency of occurrence of droughts in the east and west part, it is possible to rezone the drought monitoring area, and respectively set up the drought monitoring models for different areas. As a result, the dynamic monitoring...
The Internet of Things(IoT) and Smart Grid are of great importance in promoting and guiding development of information technology and economic. At Present, the application of the IoT develops rapidly, but due to the special requirements of some applications, the existing technology can not meet them very good. Much research work is doing to build IoT. WiFi-based Wireless Sensor Network(WSN) has the...
This paper demonstrates a novel highly sensitive chromatic dispersion (CD) monitor based on exponential power transfer function (PTF) provided by phase-matched four-wave mixing (FWM). This monitor is robust to optical filter precision errors and can operate without prior knowledge of the transmission rate.
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