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Composed by data acquisition unit, intelligent identification unit and regulating unit, intelligent circuit breaker (ICB) plays a critical role in intelligent substations, which cuts off the fault line in a quick and accurate way when fault occurs, to ensure the stable operation of intelligent substations. Temperature is the important characteristic embodying the operating status of ICB. Aiming at...
Temperature is an important aspect to reflect the status of substation power equipment. The temperature monitoring by manual inspection is inaccurate and poor continuity. And it may cause abnormal operating conditions missed or faults occurred. So temperature monitoring on substation power equipment is important. The SAW temperature sensor gets the temperature data by measuring the velocity change...
Due to the limitation of the band range of satellite sensor and the influence of the earth's atmosphere, the Landsat remote sensing images are inevitably be covered with clouds, which bring many difficulties to subsequent using and interpretation(environmental monitoring, resource investing-ation, agricultural production, ecological protection, et al). So detecting cloud accurately in remote sensing...
Junction temperature monitoring of IGBT modules is crucial for power devices in high power applications. In this paper, a thermo-sensitive electrical parameter based on the maximum collector current falling rate -dIC/dtmax for trench/field-stop IGBT junction temperature extraction is outlined. The inherent monotonic relationship between the maximum collector current falling rate and chip temperature...
Service recovery technology is an important constituent part of the emergency response technologies. The service recovery goal is to build a technology system of service recovery focusing on the survival of information system services. By analyzing the relationship between service and data, we present a service recovery mechanism by recovering service's data. We introduce a third party service monitor...
Cloud computing bring a tremendous complexity to information security. Many researches have been done to establish and maintain the trust relationship in cloud. Remote attestation is one of the most important feature of trusted computing. But conventional ways of remote attestation can only attest to the presence of a particular binary. They cannot measure program behavior. Existing dynamic remote...
Network processor is a type of specific instruction set processor which is used to process the data packet and possess specific circuit. In this paper, based on the testbench of network processor, functional coverage models are built by the two types of functional coverage expression provided by SystemVerilog. The functional coverage can be obtained automatically by these models. According to the...
Potassium permanganate was selected in studying the variation of AOC in preoxidation process. AOC was increased by 61.5% with the increase of oxidant dosages after coagulation. The AOC was increased by 23.6% only in preoxidation before coagulation. Permanganate preoxidation increased the substrate available for strain P17. The AOC/TOC ratio, which indicated assimilation ability of organic carbon,...
It is very importance to monitor fog for its impact on traffic and human health. With the development of remote sensing (RS) and geographical information system (GIS) technologies, the monitoring of fog can be easily and quickly. In this paper, a fog monitoring system based on RS and GIS was built up. Firstly, by the thresholds in different bands, the fog detection images were worked out from RS data...
Rapid tourism development in Jiuzhaigou National Park has challenged the notion of balance between tourist numbers and natural resource management. Jiuzhaigou National Park is one of the most popular natural tourist attractions in China. The current issues faced are threefold; how to manage the number of tourists accumulating in each of the scenic areas of the national park, how to expand the carrying...
PM10 (Particle Matter 10) is the major air pollutants. In this paper, the monitoring of PM10 from MODIS (Moderate Resolution Imaging Spectroradiometer) data was applied at Pearl River Delta, China. The method was as follow: 1) By DDV (dark dense vegetation) algorithm, the AOD (aerosol optical depth) was retrieved; 2) The PM10 was worked out from AOD. Using .NET multi-layer architecture, combined with...
Cognitive radio allows for usage of licensed frequency bands by unlicensed users. However, these unlicensed (cognitive) users need to monitor the spectrum continuously to avoid possible interference with the licensed (primary) users. Apart from this, cognitive radio is expected to learn from its surroundings and perform functions that best serve its users. Such an adaptive technology naturally presents...
This paper presents a new scheme for bearing-localized defect detection based on wavelet transform. Wavelet transform provides a variable resolution time-frequency distribution from which periodic structural ringing due to repetitive force impulses, generated upon the passing of each rolling element over the defect, are detected. In this paper, important properties of wavelet transform and its comparison...
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