Advanced Materials Research Vols. 1073-1076

Abstract: At present, in the aquaculture environment, bait casting process of feeding machine is using time quantitative; such feeding way did not consider too much fish feeding law which will cause bait wasting and environmental pollution. An effective way to solve the problem is how to set the feeding amount through observing the fish aggregation. An intelligent bait casting method is proposed in this paper based on the machine vision technology, according to calculate the fish shoal area and shoal ratio in the feeding process. The calculate method of the fish shoal degree and flow chart of the main program is introduced. The feeding quantity is more close to the fishing bait habit. The advantage of using this method is making the bait casting more scientific and reasonable, not only saving the breeding cost, but also reducing the environment pollution.

Abstract: Facility agriculture environment monitoring system of the existing main adopts the wired communication technology, such as serial bus technology and field bus technology for communication. This system has the advantages of good interoperability, strong anti-interference ability, but the poor stability, low reliability, difficult to deploy, installation and maintenance costs high, which greatly limits its application in the design of facilities agriculture field. Three nets fusion refers to the 3G, RFID and Internet combination. In this paper, the 3G network, wireless radio frequency technology and Internet technology combining, in order to solve the above problems, the use of 3G network and the Internet to a large amount of data real-time remote transmission, using radio frequency network RFID technology through the short distance wireless data transmission terminal sensors to collect information, these information in time through the3G network and the Internet are transmitted to the the remote controller. The remote controller sends according to terminal sensor control information, through the 3G network and the Internet will control information is transmitted to the radio frequency network, wireless RF network through wireless communication control information is transmitted to the terminal controller, the final completion of the remote monitoring and control of agricultural facilities. The experimental results show that, the system can meet the real-time and can perform remote transmission for large data, provide the technical basis of visual audio data monitoring information transmission for agricultural facilities.

Abstract: The classification precision of remote sensing image has always been one of the problems to each scholar. The traditional classification method is based on the spectral information. With the advancement of technology, the resolution of remote sensing image is gradually improving, and texture features included are getting rich, so adding texture characteristics to spectral characteristics for image classification can remedy the shortage of only relying on spectral characteristics. This paper uses experimental area of aerial image with 0.5m resolution in Datong, calculates fractal dimension using differential box-counting model, extracts the spatial texture features, and classifies precisely combining spectral characteristics in maximum likelihood method. Through comparing different classification results based on different characteristics, it show that classification accuracy based on combination of texture characteristics and spectral characteristics is more accurate (92% overall accuracy and kappa=0.91) than the one based on single spectral feature (88% overall accuracy and kappa=0.85) and texture feature (69% overall accuracy and kappa=0.65), which verifies the effectiveness of this method.

Abstract: The main task of highway natural regionalization is to reveal the regional differences of the natural environment of highway engineering, and provide scientific basis for highway construction decision. To have a quantitative and automatic study on China Highway Natural Regionalization, obtain scientific and objective regionalization conclusion, we studied the framework, spatial data mining model and development methods of China Highway Natural Regionalization GIS (HR-GIS). This paper studied integration method and framework of HR-GIS according to the guideline and methods of the research of Natural Regionalization for China Highway. Based on object-rational model, the spatial database has been built for massive data management. The spatial data mining methods were put forward to accomplish quantitative calculation of environmental indices. Using ArcGIS Engine technology, the HR-GIS has been developed and completed, and it has the functions of spatial analysis and information inquiry of natural regionalization.

Abstract: Drought is one of the most common and largest impact natural disasters to human. Since its complexity, it’s really difficult to monitoring the beginning, duration and ending of drought, neither assessment the coverage area, severity and influence of drought accurately and quantified. The development of Remote Sensing brings drought monitoring and assessment into a new space, which makes it possible to capture data timely and faster in larger scale area for drought research. In this paper, the development history of remote sensing drought monitoring is present, and the common method, arithmetic of key factor and data sources-MODIS are introduced. At the last, the future research key points are proposed.

Abstract: Based on establishing monitoring network in accordance with the requirements of criterion, monitoring network for deep foundation pit in the people's hospital of jilin province has been taken as research object to collect multi-period network information. Based on free net adjustment method, the combined adjustment has been carried out in multi-period plane network. Choosing displacement variation of two control points as mean spacing in plane network, and using mean spacing method program in MATLAB platform to calculate sample and population variance of observed value, structure F distribution and analyze the stability of monitoring points. The results show that using mean spacing method can rapidly distinguish the stability of monitoring network and points, which offers reliable gist for monitoring project.

Abstract: For the purpose of extracting the information of ice shelves, the statistical analysis of TM, ETM+ and Landsat8 OLI imagery of the typical area at the southwest corner of Wilkins Ice Shelf is conducted. Basic statistics of single bands were extracted and the correlation coefficients, joint entropy as well as the Optimum Index Factor among multiple bands were calculated. The results of experiments as well as the characteristics of spectrum characteristics of the surface features were taken into consideration comprehensively and the optional bands combinations were investigated. Results show that for TM and ETM + imagery, the combination of band 2, 3 and 4 is the optional bands combination. For L8 OLI imagery, the combination of band 3, 4 and 5 is the optional bands combination. In these two kinds of combinations, the images contain abundant information and moderate brightness. The features are more obvious to distinguish.

Abstract: This papers deals with the study of environmental impact assessment of underground coal mining activities. InSAR technique was utilized in this paper to monitor the mine subsidence caused by underground mine extractions. The study area is in Chongqing municipality in west of China, and the studied coal mine has been founded for more than 80 years. Two ALOS PALSAR images were used in this study; the time interval of two image acquisition time is approximately two years and one month. The underground mining-induced subsidence could be easily identified from the unwrapped interferogram, and the maximum subsidence value was around 32.8 centimeters.

Abstract: Based on the RS and GIS technology , interpret two high-resolution images as well as statistics and analysis the area of land cover change in order to realize the spatial distribution and change trend of land cover change for a decade.Research results show that the change of woodland area is the largest, reduce 29.48 km²; The minimum area of bare earth is only 0.20 km²; Other classes have different degree of change, in the west of the study area has taken place obviously change, mainly in the northwest of shrubs, the east has no obviously change;And the northwest areas with significantly changed about river, marshes and spatial distribution of grassland is basically in a stable state, the overall change in the study area change small scale. Studies have show that nearly a decade the Shuanghe nature reserve ecological environment to be protected well.

Abstract: Deterministic surfacing technique is an effective method for intelligent control of operation planning of the unmanned construction machine, and its foundation is the accurate modeling of the three-dimensional terrain data. According to the digital elevation model based on regular grid, the modeling of 3D terrain surface data is obtained. The evaluation of residual error is further investigated, which is quite important for the iterated operation in deterministic surfacing. Through revealing flow chart of the deterministic surfacing method, the importance of the modeling of terrain data and that of the evaluation of residual error are emphasized. The study on modeling of terrain data will promote application of the deterministic surfacing in intelligent control of unmanned construction machine.