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The purpose of image denoising is to restore the original image from the observed noisy image, under the conditions of meeting the minimum mean-square error criteria. In this paper, it summarized the basic principles of the wavelet threshold de-noising and various factors that affect the denoising performace in a complete de-noising algorithms, and analyzed several commonly used threshold de-noising...
To make the best of wind energy resources on the earth surface, the plan for a new type of wind power device, named Multiple wind wheel Wind power Device, MWD in short, was put forward. MWD composes steel tower, trusses, generator, long axis, wind turbines and wheel boxes. Only one generator installed on the ground in the middle of the generator room vertically. Several wind turbines installed to...
To make the best of heat energy in the flue gas exhausted from a coal burning boiler, the design proposal for a new type of heat exchanger was put forward in the paper. Via the new type of heat exchanger, temperature of the flue gas can be decreased from 130~140°C to 70~80°C for the boilers in a coal burning power plant, from 140~160°C to 50~60°C for the steam boilers in a heating station of enterprises...
Small hydropower, as renewable green electricity, has always been aroused all the world concern. In the "Kyoto Protocol" framework aiming to reduce global greenhouse gas as the goal, the hydroelectric project is a very important class of CDM projects, how to strengthen international cooperation to accelerate the process of China's small hydropower development, and improve capacity for sustainable...
This paper describes the use of PLC and the WinCC by profibus achieves air-conditioning system of data collection and configuration control. After the building automation system of configurated. Implementation of the various data collection process and communications, particularly the WinCC and S7-200 close contact making building automation system data collection and monitoring of control, more flexible...
The forecast of production is an important resource for establishing policy. Aimed at the character of the agriculture system, the least squares support vector machine prediction model is given based on the principle of the statistical learning theory and structural risk minimization from the Service-Oriented Architecture. The result is given that the forecasting model is effective and offers a new...
With the concept of sustainable development progresses deeply and social process of population aging intensifies, the design began to think about the plans about resource use and lifestyle within a particular social context, it thinks about the promotion of sustainable social development and other issues. We research the ideas of "make the best use of" and sustainable design around the in-depth...
For the facts that lots of low-temperature waste heat from industries (such as oil plants, chemical plants, power plants or steel plants) is abundant but rarely used, a series of analogue tests are conducted by using indoor high-temperature heat pump set-up. According to the tested data and results, the empirical expressions of all performance indexes are regressed under the condition of using R142b...
Power grid intelligent alarm and fault diagnosis program mainly use breaker and relay action alarms. However, there may be misoperations existed in relays, which could leads to incorrect diagnosis results. With the development of digital substation and application of IEC61850, the secondary circuit signals are available from integrated automation system in substation. These signals may imply control...
When fault occurs in power grid, a lot of alarms and records are generated in substations. These are secondary circuit signals, fault recorder and PMU data. Fault recorder data contains the details of fault evolution, which can be used for diagnosis fault occurrence time, circuit breaker operation events. It is crucial for power grid diagnosis and intelligent alarm functions. However, the analysis...
This paper proposed a new AC signal detection method based on variable N synchronous sampling to solve the problems on the harmonic detection and analysis of periodic sin waveform in power grid. Comparing with the traditional fixed N synchronous sampling detection in which the number of sampled data is constant in a period, the key difference of the new method is that the period of sampling points...
Oil and coal is a finite, non-renewable resource, and an oil peak is inevitable. A 100% renewable energy system (RES) requires dramatic progress in the areas of demand reduction, efficient renewable energy harvesting and integrated storage. Currently, building sector is the largest consumer in UK. It is followed by transportation sector, which has significant links with the building energy systems...
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