Entity

Time filter

Source Type


Xinting Y.,Chinese National Engineering Research Center for Information Technology in Agriculture | Ming L.,Key Laboratory for Information Technologies in Agriculture | Chuanheng S.,Key Laboratory for Information Technologies in Agriculture | Jianping Q.,Key Laboratory for Information Technologies in Agriculture | Zengtao J.,Key Laboratory for Information Technologies in Agriculture
Recent Patents on Computer Science | Year: 2012

Agricultural product quality safety is one of the hot topics in the world. From the technical view, the agricultural production management and traceability are the key measurement for insuring the quality safety. The paper introduced the research progress of traceability systems, and also discussed relevant patents. From 2005 until now, based on long-term requirement investigation and analysis, we have been investigating the system architecture for the data flow of information service for agricultural product quality safety, and developed six techniques, four equipments and six kinds of information systems. The six techniques include individual identification and coding, barcode generating and printing middleware, barcode encryption and decryption, RFID middleware, GAP-based (good agricultural practices) early warning, and XML-based data transferring. The four equipments are portable real-time record-keeping equipments for agricultural production, portable intelligent dispatching equipments for agricultural products, portable supervision equipments for agricultural products, and control equipments for agricultural product sale. The six kinds of information systems are environmental evaluation systems for agricultural fields, management information systems for agricultural safe production, wholesale market management system, logistics management system, agricultural product quality safety supervision and traceability systems and emergency management systems for agricultural product quality. Until October 2011, we have applied the above techniques to aquatic products, vegetables and fruits, as well as livestock traceability in Beijing, Tianjin, and Guangdong, China. The application has gained significant economical, social and ecological benefits. © 2012 Bentham Science Publishers. Source


Zhu H.J.,Chinese National Engineering Research Center for Information Technology in Agriculture | Zhu H.J.,Key Laboratory for Information Technologies in Agriculture | Wu H.R.,Chinese National Engineering Research Center for Information Technology in Agriculture
Applied Mechanics and Materials | Year: 2013

As an important indicator of Web application performance testing - load capacity is a key factor to judge the merits of the Web application performance, load testing model is an important premise to accurately obtain the Web applications load capacity; This article is based on the model of user groups, Through further analysis of the general user behavior, user groups model is been improved properly. The practical application shows that the improved model more realistically simulate real user behavior, and make the data more statistical significance, which can more accurately predict the performance of web applications. © (2013) Trans Tech Publications, Switzerland. Source


Zhao C.,Chinese National Engineering Research Center for Information Technology in Agriculture | Wu H.,Chinese National Engineering Research Center for Information Technology in Agriculture | Gao R.,Key Laboratory for Information Technologies in Agriculture
Applied Mathematics and Information Sciences | Year: 2012

Many complex detail objects in the village virtual scene are important to the photo-realistic rendering technology. Bump mapping, normal mapping and parallax mapping have a capability to represent the realistic rendering by disturbing normal vector or shifting the texture coordinates along the view direction. However, an incorrect offset will lead to the sliding phenomenon in the detail rendering. In this paper, a corresponding relation between the offset and the current viewpoint is proposed by establishing mathematics function of the detail image pixel coordinates and the height values. Furthermore, the new pixel offset is calculated by using GPU technology. With GPU technology, sliding phenomenon does not appear when the viewpoint changes. Thus, the detail objects have the realistic effect in village virtual scene. The experimental results demonstrate that this proposed method has achieved better performance in representing the realistic and detail rendering than traditional methods of parallax mapping and texture coordinate offset correction with GPU technology. © 2012 NSP Natural Sciences Publishing Cor. Source


Wu H.,Chinese National Engineering Research Center for Information Technology in Agriculture | Wu H.,Key Laboratory for Information Technologies in Agriculture | Gao R.,Chinese National Engineering Research Center for Information Technology in Agriculture | Gao R.,Key Laboratory for Information Technologies in Agriculture
Journal of Computational Information Systems | Year: 2011

The node localization problem in Wireless Sensor Networks has received considerable attentions. The localization can be categorized as range-free or range-based schemes based on whether the range information is used among the localization process. DV-Hop is one of the range-free localization algorithms using hop-distance estimation. In this paper, the DV-Hop localization algorithm is argued, which has low positioning accuracy. To solve this problem, a new estimation model to improve the DV-Hop algorithm is proposed by considering the relationships between the communication ranges and the hop-distances. This scheme needs no additional hardware support and can be implemented in a distributed way. Simulation results show that the performance of the proposed algorithm is superior to that of the DV-Hop algorithm. Copyright © 2011 Binary Information Press. Source


Gao R.,Chinese National Engineering Research Center for Information Technology in Agriculture | Gao R.,Key Laboratory for Information Technologies in Agriculture | Wu H.,Chinese National Engineering Research Center for Information Technology in Agriculture | Wu H.,Key Laboratory for Information Technologies in Agriculture
Proceedings - 2010 WASE International Conference on Information Engineering, ICIE 2010 | Year: 2010

Illumination makes an important role in realistic graphics rendering, especially in the mixed-scene rendering based on the geometric models and images. Adjusting illumination effect is a key step to achieve realistic scene when the images are inconsistent with the virtual environment. Therefore, complicated processing is required to generate the image with desired illumination condition. Using the technology of model rendering pipeline based on GPU, this paper presents a hue method to generate consistent ambient illumination between image and geometric models in a mixed-scene without specular and shadow. With this method, we can render the novel image under different ambient lights, and need not a lot of image data. © 2010 IEEE. Source

Discover hidden collaborations