Advanced Materials Research Vols. 268-270

Abstract: The characteristics of straight-lines and points were discussed first, and a geometric correction method based on straight-line features was introduced. In this paper, a block adjustment method combining points and straight-lines was deduced, and this method is not confined to a specific imaging geometric model, and can be applied to different data sources. Analysis of the applicability of the proposed block adjustment method shows that, bundle aerial triangulation and block adjustment with tied straight-lines is feasible. However, when this method is applied in stereo modeling from stereo-pair images, additional control data is needed.

Abstract: Change detection is a process of extracting, analyzing, and defining change information from remote sensing imageries. At present, remote sensing change detection methods are mainly classified into two categories, one based on the spectral characteristics of the type of approach, and the other is spectral change vector analysis. In this paper, a simplified threshold variable step-size search which can be used on determining changes in the threshold vector is adopted, as well as the supervised classification technique in the direction cosine space with the type of focal point in the initial assay vector remote sensing images. Results are discussed in the last part of this paper, which show that CVA can extract change information effectively in our study area of Wuhan city.

Abstract: Based on the analysis and study of the data storage strategy in wireless sensor networks, this paper presents a distributed data storage method based on sleep scheduling to resolve the problems of network imbalance and storage hot spots problems.Finally, multi group analysis of simulate experiments results show that compared to other data storage method the distributed data storage method based on composite threshold have obviously advantages on the sides of overall energy consumption,data storage capacity,the number of failure node and data quality,thus have a significant effect on reducing energy consumption and extending network life cycle.

Abstract: This work is a periodical achievement of the Post-doctors’ Funds of the mobile post doctoral center in Crop science, Northeast Agricultural University, Heilongjiang. And the title is “Research on the Yields of the Crop and the Peasants’ willingness to plant”. And it is also the periodical achievement of the Startup Foundation for Scientific Funds in Northeast Agricultural University, which is named “Research on the supportive policy of the soybeans industry based on the security of soybeans industry ” (Program Number:2009RC06) .

Abstract: The reasonable design of ordinary gear train system can enhance the transmission efficiency for mechanical device. Therefore, it is necessary to investigate into the efficiency and take the efficiency calculation as a method used for choosing gear train. Three typical conditions for ordinary gear train system, one internal meshing and one external meshing serial mechanism, two couples of external meshing serial mechanism, two couples of internal meshing serial mechanism, are respectively calculated. The calculating results can provide reliable reference for design of ordinary gear train.

Abstract: The bulk metallic glass has received much attention from scientist and engineer. In this paper, we fabricated metallic glass of Nd-based and carried out experimental research. This kind of metallic glass has shown a distinct glass transition and stable super-cooled liquid region. At the same time, we find the paramagnetic performance of Nd-based metallic glass is different from other hard magnetic alloys at ordinary temperature. The DSC experiment indicate that the glass transition temperature increase with the heating temperature.

Abstract: In the industry of petrochemical, tubular furnace is a kind of energy-consumption device, therefore it appears especially significant for its controlling. Usually, it adopts kingview software for simple monitoring, which hardly lowers consumption. Moreover, because of the limitation of compiling control arithmetic, it becomes unrealistic for complicated control requirements. While MATLAB is equipped for powerful function of numerical analysis and computing, it can accomplish the designation for the complex intelligent controller and data analysis processing. The two complement each other can realize the real-time control of combining Kingview with MATLAB, but the key technology is to realize the real-communication of them. In this paper, OPC technology based on the standard interface is illustrated, and on this basis, the program of the real-communication between King view and MATLAB based on OPC is introduced. The thesis takes tubular furnace temperature control before and after preheating for example, and finally proves the advantages complementation between kingview and MATLAB, which supplies an efficient path for realizing complex control arithmetic.

Abstract: The data transmission on CAN bus is decided by priority, That is the data with high priority can always be transmited by inturrupt the data transmission with low priority .In that case the data with lower priority may not be transmitted for a long time .To sove such problem we use DRR scheduling algorithm ,But in the case of too many unexpected data ,The scheduling results are poor .In view of such situation this paper put forward a solution allocation quotas dynamicly according to the current network state . And setting up a CAN bus system simulation platform in which conducted a simuliation experiment.The result show that the improvement strategy work well at any situation.

Abstract: At present，the open arehitecture controller and the field bus for motion control is a hotspot at home and abroad in the field of numerieal control system.This paper analyses the advantage of the typieal open arehitecture controller and improves.The open movement contro1 Platform based on BUS,which uses the open numrerieal control arehiteehire, that is，in order to control the system intelligently, We use a signal wire or optical fibre which connects all the drivers and the I/O port to transmit signals. In the system，all the control is operated by the up-pc machine，and the intelligent control nod is only used for communicating and translating the instruction.The control system uses Visual C# to empolder the up-pc software, and uses C to empolder the intelligent control interface. Experiments show that the system with the velocity error of less than 5%, the transition time of less than 0.1s, position error of less than 1mm. It can achieve not only the customization of the human-machine interface, and the parameterization of the real-time control parts, but also the exact travel path, the fast response, high accuracy positioning and other performance.

Abstract: Analyze RFM (recency, frequency, and monetary) paradigm with customer, and use two-step clustering to segment the customers. It is divided into five levels includes core customer, potential customer, new customer, worthless customer and lost customer. And then through the AHP to determine weights of RFM three dimensions of each cluster for further quantitative analysis of the cluster. Sort the lifetime value of customers according to scores of each type customer