In the application of 3D Geoscience Modeling,we often need to generate the volumetric representations of geological bodies from their surface *** octree,as an efficient and easily operated volumetric model,is widely u...
详细信息
In the application of 3D Geoscience Modeling,we often need to generate the volumetric representations of geological bodies from their surface *** octree,as an efficient and easily operated volumetric model,is widely used in 3D Geoscience *** paper proposes an algorithm for fast and dynamic generation of linear octrees of geological bodies from their surface models under hardware *** Z-buffers are used to determine the attributes of octants and voxels in a fast way,and a divide-and-conquer strategy is adopted.A stack structure is exploited to record the subdivision,which allows generating linear octrees *** algorithm avoids large-scale sorting process and bypasses the compression in linear octrees *** results indicate its high efficiency in generating linear octrees for large-scale geologic bodies.
The suitability of two algae species, Gracilaria lemaneiformis and Sargassum pallidum, for use as food sources for the abalone Haliotis discus hannai Ino was evaluated. Abalones were fed one of five experimental diets...
详细信息
The suitability of two algae species, Gracilaria lemaneiformis and Sargassum pallidum, for use as food sources for the abalone Haliotis discus hannai Ino was evaluated. Abalones were fed one of five experimental diets: 1) kelp Laminari japonica: 2) G. lemaneiformis: 3) S. pallidum;4) a mixed diet of L. japonica and G. lemaneiformis (1:1);and 5) a mixed diet of L. japonica and S. pallidum (1:1) for a period of 4 months. The survival, growth (shell length and body weight), condition index (body weight/shell length), and feed utilization were measured. Survival was excellent (100%) in all groups. Growth rate (body weight) was highest in the abalone fed kelp exclusively, followed by the mixed diet of kelp and G. lemaneiformis. The abalone fed S. pallidum had the lowest increase in body weight and the lowest feed intake. The mixed diet of kelp and G. lemaneiformis yielded the biggest increase in shell length. There were no significant differences in the condition index among all the treatment groups. The mean daily feed intake of L japonica was highest, followed by the mixed diets of kelp and G. lemaneiformis, and was lowest for S. pallidum. Abalone exhibited a preference for L japonica. The feed conversion efficiency was highest for G. lemaneiformis. Results suggest that G. lemaneiformis can be used as a partial substitute for kelp in the diet of cultured abalone. (C) 2010 Elsevier B.V. All rights reserved.
Chunk decomposition is defined as a cognitive process which breaks up familiar items into several parts to reorganize them in an alternative *** present study investigated the effective connectivity of visual streams ...
详细信息
Chunk decomposition is defined as a cognitive process which breaks up familiar items into several parts to reorganize them in an alternative *** present study investigated the effective connectivity of visual streams in chunk decomposition through dynamic causal modeling(DCM).The results revealed that chunk familiarity and perceptual tightness made a combined contribution to highlight not only the "what" and the "where" streams,but also the effective connectivity from the left inferior temporal gyrus to the left superior parietal lobule.
A neural-network-based adaptive approach is proposed for the leader-following control of multiagent systems. The neural network is used to approximate the agent's uncertain dynamics, and the approximation error an...
详细信息
A neural-network-based adaptive approach is proposed for the leader-following control of multiagent systems. The neural network is used to approximate the agent's uncertain dynamics, and the approximation error and external disturbances are counteracted by employing the robust signal. When there is no control input constraint, it can be proved that all the following agents can track the leader's time-varying state with the tracking error as small as desired. Compared with the related work in the literature, the uncertainty in the agent's dynamics is taken into account;the leader's state could be time-varying;and the proposed algorithm for each following agent is only dependent on the information of its neighbor agents. Finally, the satisfactory performance of the proposed method is illustrated by simulation examples.
＜正＞Skin sensitization is an important toxic endpoint to be taken into account in the risk assessment of *** this paper,SAR（structure-activity relationships） analysis was performed on the skin sensitization potent...
详细信息
＜正＞Skin sensitization is an important toxic endpoint to be taken into account in the risk assessment of *** this paper,SAR（structure-activity relationships） analysis was performed on the skin sensitization potential of 320 compounds with local lymph node assay（LLNA） *** fragments were extracted by GASTON（GrAph/Sequence/Tree extractiON） based on ’quickstart principle’ from the training set.8 fragments of which the accuracy Q is significantly higher than 0.73（p＜0.1） were retained to make up an indicator descriptor *** fragment descriptor and 8 other physicochemical descriptors closely related to the endpoint,were calculated to construct the recursive partitioning tree（RP tree） for *** balanced accuracy of the training set and test set in the leave-one-out model were 0.846 and 0.800,*** results highlight that fragment-based RP tree is a preferable method for identifying skin ***,the selected fragments provide useful structural information for exploring sensitization mechanisms, and RP tree creates a graphic tree to identify the most important properties of skin sensitization. They can provide some instruction for designing of drugs with lower sensitizability.
The microstructures and deformation behavior of Ti-based metallic powders were comprehensively investigated. It has been found that, with increasing the powder size, the phase constituent alters from pure glassy to gl...
详细信息
The microstructures and deformation behavior of Ti-based metallic powders were comprehensively investigated. It has been found that, with increasing the powder size, the phase constituent alters from pure glassy to glassy with crystalline phases (face centered cubic structured NiSnZr and hexagonal structured Ti3Sn phases). Our results suggest that the synergetic effect of the thermodynamics and kinetics determines the subsequent characteristics of the crystalline precipitations. Through comparative nanoindentation tests, it was found that the small powders exhibit more pop-in events and a larger pile-up ratio, suggesting that the plastic deformation of the metallic powders is governed by the combined effects of the free volume and the crystallization, which are determined by the cooling rate. (C) 2010 Elsevier B.V. All rights reserved.
The electronic structure of （001） polar surface of cubic zirconia was studied by GGA（WC） approximation. We found the cubic lattice near （001） surface showed an intensive tendency to transfer to tetragonal lattic...
详细信息
The electronic structure of （001） polar surface of cubic zirconia was studied by GGA（WC） approximation. We found the cubic lattice near （001） surface showed an intensive tendency to transfer to tetragonal lattice. The metallic state appeared on both the terminations. For O-termination, some O2p states were vacated and hole carriers concentrated on surface oxygen-ions. For Zr-termination, some Zr4d states became partial occupied for the loss of O2p states. We observed the hole states were mainly localized at the corresponding ions on surface for both the terminations, while the charge states on Zr-termination were dispersed on surface.
A wiki system is a typical Web 2.0 application that provides a bi-directional platform for users to collaborate and share much useful information ***,computers cannot well understand the wiki pages in plain *** user-g...
详细信息
A wiki system is a typical Web 2.0 application that provides a bi-directional platform for users to collaborate and share much useful information ***,computers cannot well understand the wiki pages in plain *** user-generated geographical content via wiki systems cannot be manipulated properly and efficiently unless the geographical semantics is explicitly *** this paper,a geographical semantic wiki system,Geo-Wiki,is introduced to solve this ***-Wiki is a semantic geographical knowledge-sharing web system based on geographical ontologies so that computers can parse and storage the multi-source geographical ***,Geo-Wiki mashed up with map services enriches the representation and helps users to find spatial distribution patterns,and thus can serve geospatial decision-making by customizing the Google Maps APIs.
The quick and the dry: Fast-absorbing and quick-drying wool fabrics with good washing durability are fabricated by functionalizing reactive siloxane monolayer on wool fiber surface, followed by grafting an ultrathin s...
详细信息
＜正＞Carcinogenicity is an important toxicological endpoint that poses the highest concern for human *** this study,we develop a method that extracts structural alerts（SAs） and modulating factors of carcinogens bas...
详细信息
＜正＞Carcinogenicity is an important toxicological endpoint that poses the highest concern for human *** this study,we develop a method that extracts structural alerts（SAs） and modulating factors of carcinogens based on pure statistical ***,Gaston algorithm,as a frequent subgraph mining method,detects efficiently substructures of any size,shape,and level of chemical ***,building and pruning of a molecular fragments tree select SAs with statistical significance in binomial ***,modulating factors that are able to destroy the carcinogenicity potential of SAs are extracted by three self-defining *** results highlight that this method is a preferable method with higher accuracy,and the selected SAs are usable for prediction as well as ***,our method can extract SAs from database using an automated and unbiased manner which has no use of a priori knowledge of mechanism of action, and are conveniently employed by a user.
暂无评论