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this paper describes the plan design and technical features of 220kV Wangtie Smart substation, which includes many technical innovations, such as integrated measurement, control & protection devices, new busbar differential protection synchronization, adaptive sampling delay compensation of optical longitudinal differential protection, sampled value transmission mode based on online switching...
As the application of information system has been increasingly constructed in large enterprises and institutions, IT operation and maintenance have been developed into a integrated operation and maintenance system with multi-grade, multi-level and multi-control parameters, and its security level is difficult to be measured with a single indicator. On the basis of satisfying the dispatching and monitoring...
In this paper, we propose a novel method of disturbance detection by using image morphology to solve the challenging multi-point detection problems in polarization-sensitive optical time domain reflectometry (P-OTDR), which restrict its practical applications greatly. The new methodology is processed by accumulating the temporally differentiated OTDR traces and building up a two-dimensional temporal-spatial...
Online monitoring, providing the real-time status information of servers, is indispensable for the management of distributed systems, e.g. failure detection and resource scheduling. The main design challenges for distributed monitoring systems include scalability, fine granularity, reliability and low overheads. And the challenges are growing with the increase of the scales of the distributed systems...
Gully erosion removes large volumes of soil and water from complex areas. It's difficult to quantify the loss of soil because the footprint of individual gullies is too complex to be captured by most common measures, such as general available digital elevation models (DEMs). LiDAR (Light Detection and Ranging) is a recent innovation technique widely used in topographic surveying, smart city, historic...
Warehousing is an indispensable link in logistics. It's very necessary to monitor and manage warehousing synthetically for the warehousing developing so far. According to the characters of warehousing, we propose the concept, architecture and function of warehousing integrated supervisory control system (W-ISCS) based on the research and application in various industries. This paper firstly analyzes...
The warehousing time and quality of the fruits are greatly influenced by the warehousing environment factors. Therefore, it has crucial significance for the fruit warehousing environment to carry out multi-parameter monitoring and analyze the parameters collected and then make the regulation and control. Currently this paper presents the environmental factors effected on the fruits warehousing quality...
In this paper, a current sensing mechanism for biochemical sensor is presented. The sensing circuit consists of current conveyor, current mirror, current range detection circuit, and current to digital converter. The chip can be integrated in a potentiostat system. This work is implemented in TSMC 0.18-µm CMOS process, and the area is 0.5625 mm2. The measured current ranges from 20 µA to 1200 µA with...
Real-time monitoring, providing the real-time status information of servers, is indispensable for the management of distributed systems, e.g. failure detection and resource scheduling. The scalability of fine-grained monitoring faces more and more severe challenges with scaling up distributed systems. The real-time compression which suppresses remote information update to reduce continuous monitoring...
With the wide deployment of flow monitoring in IP networks, flow data has been more and more applied on abnormal traffic detection. In practice, anomalies should be detected as fast as possible from giant quantity of flow data, while, at present, some classical anomalies detecting methods can not achieve this goal. In this paper, we propose and implement a distributed streaming computing system which...
Darknets can be used to monitor unexpected network traffic destined for allocated but unused IP address blocks, thus providing an effective traffic measurement technique for viewing certain remote network security events. Past works in this field discussed the possible causes (events) of darknet traffic and applied their classification schemes on short-range traces. Our interest lies, however, in...
In order to support the development of the smart grid and the demand side management, this paper designs and implements a regional energy management system (R-EMS) considering demand response (DR). The R-EMS can realize the information linkage between the regional energy management and single-point energy management. Firstly, the design requirements and architecture of the system are proposed. And...
Warehousing is an important guarantee for well running materials supply and logistics. And warehousing process directly affects the normal operation of the business. Therefore, how to guarantee the optimal warehousing process and complete it on-demand has become a topic which is worth studying. There are many problems existing in the warehousing business. According to the analysis of the current situation...
With the demand of increasing revenue by attracting customers consuming mobile internet services, traffic monitoring and analysis become more critical on network management and service provisioning for operators and ISPs. At the same time, the rapid growing number of smartphone clients led to more complexity and explosive mobile Internet traffic. It makes traditional traffic analyzing methods face...
Dry and wet deposition of inorganic nitrogen species were monitored at one urban (SDS) and one rural (TFS) site during September 2009 and August 2010 at Urumqi in a semi-arid region. Atmospheric concentrations of NH3, NO2, HNO3, particulate ammonium and nitrate (pNH4+ and pNO3-) concentrations and NH4-N and NO3-N concentrations in precipitation showed large monthly variations and averaged 7.0, 18...
In recent years, new challenges and emerging applications have inspired increasing research interests in the area of underwater networks. However, field experiments are expensive and not all the research work can be evaluated in real world scenarios in a timely fashion. This motivates our interest on developing an affordable, accessible and user friendly platform for conducting field experiments....
To the requirement and actuality of ground TT&C network multi-mission management in China, the idea of remote monitoring and controlling system constructed by client/server system is proposed. Firstly, the system frame of automatic monitoring and controlling for China TT&C network is studied. Then, the multi-mission automatic operation flow of ground TT&C network is studied. Finally, the...
According the specialty of wireless sensor network technology and the characteristic of warehouse measure and control system, an intelligent warehouse measure and control system based on Zigbee WSN and network nodes are designed. At the same time, the whole design frame and the hardware structure of sensor nodes and applications software flow chart are analyzed. The Zigbee wireless sensor network...
In summer of 2008, an outbreak of Enteromorpha Prolifra (EP), a kind of green algae, occurred in the Yellow Sea of china and posed a serious threat to the 29th Olympic Sailing Games. A color array camera was installed on the aircraft and used to monitoring the spatial distribution of EP. In this paper, we measured the spectral properties of EP and analyzed the R, G, B three band aerial remote sensing...
Many enterprises, organizations, governments and militaries are all facing a problem: how to protect their confidential documents, especially how to prevent them from being unauthorized copied or redistributed is a serious trouble as lacking of mechanism to forbid this action at present. In this paper we propose a Secure Confidential Document Model (SCDM). The document under the proposed model is...
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