Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-11-29 Cooperative journals: 《计算机应用研究》
Abstract： In the existing anonymous system based on network coding, the success rate of data transmission is low due to the instability of forwarding nodes and the multipath forwarding of anonymous messages. Aiming at this, a new anonymous communication mechanism ACSNC based on network coding and data redundancy method is proposed. The proposed mechanism first adopts a data redundancy mechanism to redundantly fragment the data to be sent and send it along multiple paths. Then, the intermediate forwarding node randomly encodes the information and then forwards the information so that the statistical characteristics of the information are changed before and after passing through the node. Finally, the destination node recovers the anonymous information based on the received data slice and coding coefficients. Simulation results show that the mechanism can effectively guarantee the anonymity and security of communication on the basis of significantly improving the success rate of data transmission.
Subjects: Biology >> Zoology submitted time 2017-10-23 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究不同饲粮非纤维性碳水化合物（NFC）/中性洗涤纤维（NDF）对黔北麻羊瘤胃发酵参数、血浆生化指标、养分消化率的影响。采用3×3拉丁方试验设计，选取6只健康成年黔北麻羊为试验动物，将其分为3组，每组2个重复，每个重复1只羊。试验Ⅰ组、试验Ⅱ组、试验Ⅲ组饲粮NFC/NDF分别为2.14:1.00、1.05:1.00、0.40:1.00。试验分3期，每期15 d，包括10 d预试期和5 d正试期。检测指标包括：饲粮养分消化率、瘤胃发酵参数（pH、缓冲力、氨态氮和挥发性脂肪酸浓度、纤维素酶活性）、血浆生化指标（脂多糖、白蛋白、尿素氮、葡萄糖含量及过氧化氢酶、谷草转氨酶、超氧化物歧化酶、谷胱甘肽过氧化物酶活性）。结果显示：1）3个试验组干物质采食量差异不显著（P>0.05），试验Ⅲ组各养分消化率均显著低于试验Ⅰ组、试验Ⅱ组（P0.05）。3）试验Ⅰ组、试验Ⅱ组、试验Ⅲ组血浆脂多糖含量依次显著下降（P0.05）。综合来看，过高NFC/NDF对黔北麻羊瘤胃发酵参数和血浆生化指标有不良影响，本试验条件下，饲粮NFC/NDF以1.05:1.00为宜。
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