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In this paper,the influence of W/B ratio to the performance and durability of High Performance Concrete applied in Passenger Dedicated Line is studied through experiment. It is concluded that: W/B ratio is bad to the compressive strength, electric flux and frost resistance of High Performance Concrete. So it is necessary to control the W/B ratio in practical engineering with the meeting of the request...
The notion of Divisible Online/Offline Signature (DOS) was recently introduced by Gao et al. in CT-RSA 2009. In a DOS system, the idea is to perform the signing process in two phases. The first phase outputs offline tokens before the arrival of a message to be signed, where the offline tokens are regarded as a part of full signature, and the second phase is performed very efficiently after knowing...
On the basic of summarizing the methods of triangulation for points cloud data, a triangulation algorithm for point clouds of body surface was realized in this paper. This algorithm searched the nearest neighbors of boundary points by using the algorithm of k-nearest neighbors quickly, constructed triangles based on the boundary ring of incremental algorithm, and realized the construction of topological...
The notion of identity-based online/offline encryption (IBOOE) was recently introduced by Guo, Mu and Chen in FC 2008. In an IBOOE system, the encryption is split into online and offline phases. The offline phase is performed prior to the arrival of a message and the recipient's public key (or,identity). The online phase is performed very efficiently after knowing the message and public key. The IBOOE...
Here discussed in detail are the methodology of identifying and evaluating in advance any effect, mainly negative, which results from the implementation of a proposed road upgrading project in Ethiopia, any change to the environment or to its component that may affect human health or safety, flora, fauna, soil, air, water, climate, etc. With a review of the Ethiopian environmental policies and legislative...
Hierarchical identity-based encryption (HIBE) is a generalization of IBE that mirrors an organizational hierarchy, which consists of a root private key generator (PKG), domain PKGs and users. In a traditional HIBE system, users retrieve private keys from their domain PKGs, while domain PKGs request domain secret keys from the root PKG. What's more, the manager of each private key is a single one....
Since Graphplan was proposed, intelligent planning has become a research focus in AI. This paper provides a new algorithm that extends Least Committed Graphplan to handling conditional effects. Different from the previous work on it, we employ the sub-mutex relations between action components, which makes the construction of planning graph much faster. In addition, we distinguish brotherhood components...
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