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Spacecraft formation flying has different from the traditional spacecraft orbit control of a single satellite, which has a certain degree of autonomy to maintain specific formation geometries configuration. According to the existing satellite platform technology, a software implementation of autonomous orbit control is proposed as a supplement of the satellite onboard control system. With that same...
In recent years, specialized R&D or management departments of service innovation have appeared in some large-size enterprises in China, which aim to effectively manage service innovation activities. This article studied on cases of ten leading enterprises in China and summarized the function of the specialized department in service innovation. Its functions include managing ideas and innovative...
In this paper an object detection algorithm is proposed, which is robust in the presence of cast shadows and is based on geometric projections. The novelty of the work lies in the use of homology mapping of the foreground regions between different parallel planes within a monocular view, unlike some existing algorithms which depend on the use of multiple cameras. The results on an open video dataset...
An object detection algorithm which can remove moving cast shadows is presented. It is based on the homography mapping of foreground regions from multiple cameras. Not only the homography for the ground plane but also those for multiple parallel planes are employed. Unlike the existing geometric approaches, this algorithm removes cast shadows while keeping the feet of moving objects.
SQL-Injection is an attack for Web applications which are based on database system, and it is one of the most serious security threats for Web application. This paper proposes a new middle-ware-based prevention mechanism: SQLIMW. The SQLIMW avoids SQL-Injection attack from the programmer to the server, and use HASH function to replace encryption. Furthermore, it protects username, password and private...
This paper presents a novel platform as a workflow engine service which helps users to utilize cloud computing for addressing problems of large scale data processing without knowledge of underlying configuration details for computing applications. Our platform provides elastic resources for workflow applications to ensure that users leverage resources efficiently with the consideration of their budgets...
The development of computer technology, network technology and simulation technology promoted the construction and usage of network virtual experiment system. Basing on the literature research, the passage generalized and sumed up the major virtual experiment instruction mode in current time, at the same time, the passage analysed and compared the virtual experiment system from the mode feature, theory...
Concrete composite wall system is an innovated composite structure system. Tow RC coupled composite walls were tested quasi-statically under low cyclic lateral loads. The characteristics including failure modes, bearing capacity, stiffness degradation, ductility and hysteretic characteristics are investigated. It is shown that on the elastic stage, the precast slabs and frame could work together very...
Online hot topic detection is a significant research field in web data mining, which can help people make policy decision or benefit to people's daily life. Actually, in recent years more and more hot topics are arising from BBS, often referred as online forum. BBS provide a communication platform for people to discuss and express their views. It's obvious that forecasting the hotness topics on BBS...
The paper conducts a comprehensive evaluation technique from a three-dimensional view, in which an evaluation model with three dimensions of “history”, “status” and “future” is constructed. Then, the research on science research capability of national defense university based on the niche theory as an example is pulled into to illustrate the feasibility of the methodology from the empirical perspective...
The paper conducts a research on science research capability of national defense university based on the niche theory, in which an evaluation index system and dynamic evaluation model with the characteristic of stimulation of science research capability of national defense university is constructed. Then, a case is pulled into to illustrate the feasibility of the methodology from the empirical perspective...
Shanghai World Expo 2010 starts on May 1st 2010, lasting for 184 days, with estimates of visitors being 70 million. Average daily expectancy of visitors is approximately 400,000, and on the peak days it is expected to reach up to 800,000. The purpose of this paper is to explore the inherent principles of the varying visitor flow at big events such as Expo, and to propose the strategies which can help...
This paper presents a new carving method for automatically and effectively carving PDF files from an unstructured digital forensic image. The carving method has five validation algorithms based on the content characters and the internal structure of PDF files. These validation algorithms include header/file length/maximal offset of objects/footer validation, internal structure validation, entropy...
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