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Routing in wireless sensor networks (WSNs) is very challenging due to their inherent characteristics of large scale, no global identification, dynamic topology, and very limited power, memory, and computational capacities for each sensor. Recent research on WSNs routing protocol has proved that data-centric technologies are needed for performing in-network(More)
Keywords: Greenhouse gas emissions Carbon emission inventory Input–output analysis a b s t r a c t For greenhouse gas (GHG) emissions by the Chinese economy in 2007 with the most recent statistics availability, a concrete inventory covering CO 2 , CH 4 , and N 2 O is composed and associated with an input–output analysis to reveal the emission embodiment in(More)
Trametes Villosa Laccase (TVL) was immobilized through physical adsorption on SBA-15 mesoporous silica and the immobilized TVL was used in the oxidative coupling of trans-resveratrol. Higher loading and activity of the immobilized enzyme on SBA-15 were obtained when compared with the free enzyme. The effects of reaction conditions, such as buffer type, pH,(More)
(R)-1-Chloro-3-(1-naphthyloxy)-2-propanol, which is the key intermediate of (S)-propranolol, was successfully prepared via enantioselective transesterification catalyzed by lipase under ultrasound irradiation. Compared with conventional shaking, the enzyme activity and enantioselectivity were dramatically increased under ultrasound exposure. Effects of(More)
WebVR, a multiuser online virtual reality engine, is introduced. The main contributions are mapping the geographical space and virtual space to the P2P overlay network space, and dividing the three spaces by quad-tree method. The geocoding is identified with Hash value, which is used to index the user list, terrain data, and the model object data. Sharing(More)
Starting from the development of VR and WEB technologies, in this article, we analyze the characters and the development foregrounds of the 3D virtual community based on the WEBVR (Web Virtual Reality) technology, and introduce the characters of the RIA (Rich Internet Application) technology system. And we put forward the technical frame of the 3D virtual(More)
Clustering provides a viable approach to building a scalable Web server system. Many existing cluster-based Web servers, however, do not fully utilize the underlying features of the cluster environment, and most parallel web servers are designed for homogeneous clusters. In this paper, we present a pure-Java-implemented parallel Web server that can run on(More)