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In order to improve the computational accuracy for runoff simulation, an artificial intelligent technique, improved chaos genetic algorithm (ICGA) is proposed, in which initial population are generated by chaos mapping and searching range is automatically renewed with the excellent individuals obtained by ICGA. Its global convergence is analyzed. Its efficiency is verified by application of runoff...
As one of important cloud detecting means, millimeter-wave cloud radar has been given more and more attention and research. This thesis mainly summarizes and analyzes the technical features and detecting capabilities of millimeter-wave cloud radar, and it describes the data applications of millimeter-wave cloud radar which contain researches of cloud structure features and analyses of typical weather...
In the paper, panchromatic and multispectral images in Landsat7 ETM data format of America terrestrial satellite (Landsat7) are matched and fused based on the remote sensing image information extraction by using MapGIS K9 software. At the same time, the qualities of the fused images by using MAPGIS K9 are evaluated, so as to lay a basis for the future use of remote sensing image analysis and interpretation...
Rural residential land use is a major indicator on Land use/cover change (LUCC) research, particularly in China, where the land cover has changed greatly over the past 40 years. In this paper, a case study was taken to extract the spatial distribution feature of rural residential land in west area of Hangzhou, China, using Corona KH-4B (1969) satellite imagery declassified by US. An accurate assessment...
with the development of the urbanization process, the spatial-temporal behavior of the urban crowd is becoming focus of the research in urban transportation, environment and evacuation etc. The model of the spatial-temporal behavior of the crowd has wholly turned to micro and detailed from traditional mean. Traditional GIS data model rarely considers the behavior of human activities in micro-geographical...
In this study, we take main city zone, Tianjin for example. Residential land and farmland is extracted based on MSS image in 1984 and TM image in 2011. And two data are analyzed using spatial modeling technology. The interactive change for 27 years is obtained. The results show that the area of residential land increases from 37.70×103 hm2 to 85.83×103 hm2, and the area of farmland decreases from...
The need for increased accuracies in time series forecasting has motivated the researchers to develop innovative prediction models. In this paper, a novel weakening operator model is proposed according to the rule of prior usage of new information.Meanwhile, they are compared with the existing weakening buffer operators in forecasting effectiveness.A numerical example is adopted for demonstration...
The trend of development of government investments to traffic informationization is a key which enterprises need to grasp accurately in the process of informationization construction. On the basis of the existing study results of GM(1,1) model, this paper proposes a combination method unifying the improved initial condition and the optimized background value of GM(1,1) model, constructs a new GM(1,1)...
This study tests the compressive strength and flexural strength of two different types of anti-crack mortars in a variety of maintenance time periods, draws diagram of change trend, and analyses the reason for these changes. The experimental results indicate: (1) the various performance of anti-crack mortar is strengthened with the increase of maintenance time in general, (2) cement plays an important...
In this paper, wind speed and direction along the high speed train railway line was predicted with the help of Kalman filter using simulated data. Results fit well with the true speed and direction. Warning system to adjust train speed was built mainly based on integrated risk coefficient, which was defined as the function of not only wind speed and direction, but also train speed and location.
The paper designs a method based on RS-485 to achieve the communication between the VDR system and the detection system on having an alarm-reporting function when the navigation light's filament is in a state of broken wire. In this paper, the overall structure of the system is put forward, the system's hardware is designed and communication protocol is provided as well as the simulation debugging...
The paper makes comparison between the evaluation method using segmented indexes and fuzzy function analysis method,and presents AHP and the fuzzy function analysis method roughly. The evaluation system for traffic congestion rating in the research is determined according to the main principles widely used at home and abroad. In the last,the paper demonstrates the theories mentioned before by using...
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