一种信息中心移动自组网中的数据访问控制机制

针对信息中心移动自组网场景中节点间间歇连接和网内泛在缓存的特点,提出一种基于门限秘密共享机制的数据访问控制机制.通过构建辅助密钥块,降低了消费者解密的开销和网络节点的存储资源消耗.同时,通过引入双变量单向函数,保障了消费者子秘密份额的唯一性,减少了消费者侧秘密份额管理所带来的空间开销.仿真和理论分析结果表明,该机制显著降低了消费者侧的解密开销,良好地适应了信息中心移动自组织网络场景.     

双排桩支护结构的影响因素分析

在基坑支护体系中双排桩结构支护运用较晚,但与其它支护体系相比,该支护方式具有整体刚度和稳定性较好的优点在基坑工程中被广泛的应用.本文选取基坑工程中的1-1剖面进行数值模拟分析,不仅对其不同工况下的水平位移和沉降进行规律性总结,还对双排桩结构设计中的桩间距、前后排桩的排距和桩长不同的取值情况,对其支护结构的影响进行分析,可为今后双排桩结构支护设计提供参考.     

计及蓄电池寿命的微网群优化调度模型

为延长蓄电池使用寿命,减少微网群运行成本,构建了计及蓄电池寿命的微网群多目标优化调度模型.以包含风、光、储、柴、燃料电池的两个子微网所构成的交流微网群作为研究对象,采用改进后的加权吞吐量法构建蓄电池寿命模型并预测蓄电池寿命.综合考虑系统发电成本、环境污染成本和蓄电池寿命损耗成本,在满足负荷供需平衡、不同微源出力等约束条件下,通过加权系数法将多目标函数归一化为综合目标函数,并利用二元对比定权法确定权系数,把对蓄电池的重视程度分为较低、中等、较高三种情况.采用粒子群优化算法进行求解,并对三种情况下的微网群调度结果与蓄电池寿命损耗情况进行对比分析.结果表明,该优化调度模型可有效提高微网群经济效益,并减小蓄电池损耗,验证了该模型的有效性.     

污泥掺烧输送系统研究

通过对国内多个污泥掺烧项目污泥输送系统介绍,研究了污泥接卸、输送、贮存、配料等系统的主要技术方案,针对目前国内污泥掺烧没有相关标准的情况,对污泥掺烧输送系统关键参数选择进行了探讨,为污泥掺烧电厂污泥输送系统设计提供技术参考.     

Effect of supports on the redox performance of pyrite cinder in chemical looping combustion

Chemical looping combustion (CLC) is a clean and efficient flame-free combustion technology,which combust the fuels by lattice oxygen from a solid oxygen carrier with inherent CO2 capture.The develop-ment of oxygen carriers with low cost and high redox performance is crucial to the whole efficiency of CLC process.As the solid by-product from the sulfuric acid production,pyrite cinder presented excellent redox performance as an oxygen carrier in CLC process.The main components in pyrite cinder are Fe2O3,CaSO4,Al2O3 and SiO2 in which Fe2O3 is the active component to provide lattice oxygen.In order to sys-tematic investigate the functions of supports (CaSO4,Al2O3 and SiO2) in pyrite cinder,three oxygen car-riers (Fe2O3-CaSO4,Fe2O3-Al2O3 and Fe2O3-SiO2) were prepared and evaluated in this study.The results showed that Fe2O3-CaSO4 displayed high redox activity and cycling stability in the multiple redox cycles.However,both Fe2O3-Al2O3 and Fe2O3-SiO2 experienced serious deactivation during redox reactions.It indicated that the inert Fe-Si solid solution (Fe2SiO4) was formed in the spent Fe2O3-SiO2 sample,which decreased the oxygen carrying capacity of this sample.The XPS results showed that the oxygen species on the surface of Fe2O3-CaSO4 could be fully recovered after the 20 redox cycles.It can be concluded that CaSO4 is the key to the high redox activity and cycling stability of pyrite cinder.     

基于FX3UPLC的弧形立库控制系统应用研究∗

随着物流仓储行业的快速发展,自动化立库的应用日益广泛.介绍了一种基于三菱FX3U PLC的小型弧形立库控制系统,分析了该立库控制系统结构,以及入库、出库、移库等控制流程的设计和编程思路.实践应用表明,该弧形立库机械结构紧凑、系统操作和控制更简便.     

常压/低压湿空气催化氧化氯乙酸降解机理

利用无机熔盐水合物的温升效应,考察了氯乙酸废水在常压/低压下湿空气催化氧化降解效果,分别探讨了催化剂种类、反应温度、反应时间对氯乙酸和COD(化学需氧量)去除率的影响,并对反应机理进行了初步探讨.结果表明,在CaCl2?2H2O熔盐水合物中CuCl2对氯乙酸的降解效果最佳,在200℃和0.35 MPa条件下氯乙酸去除率可达97.2％,COD去除率可达90.7％.通过自由基抑制实验和中间产物分析推测反应机理为:在羟基自由基的协同催化下,氯乙酸依次降解为羟基乙酸、二羟基乙酸、甲酸、CO2和水.     

35kV变压器故障气相色谱分析

对于运行中的变压器,气相色谱分析法可实现其内部故障的诊断,并提供有效的运维建议.应用气相色谱分析法分析一起35 kV变压器故障,为气相色谱分析法的进一步推广应用提供有力的技术支撑.     

In Vitro Characterization of Neutralizing Hen Antibodies to Coxsackievirus A16

Coxsackievirus A16 (CA16) is one of the major causative agents of hand, foot, and mouth disease (HFMD). Children aged <5 years are the most affected by CA16 HFMD globally. Although clinical symptoms of CA16 infections are usually mild, severe complications, such as aseptic meningitis or even death, have been recorded. Currently, no vaccine or antiviral therapy for CA16 infection exists. Single-chain variable fragment (scFv) antibodies significantly inhibit viral infection and could be a potential treatment for controlling the infection. In this study, scFv phage display libraries were constructed from splenocytes of a laying hen immunized with CA16-infected lysate. The pComb3X vector containing the scFv genes was introduced into ER2738 Escherichia coli and rescued by helper phages to express scFv molecules. After screening with five cycles of bio-panning, an effective scFv antibody showing favorable binding activity to proteins in CA16-infected lysate on ELISA plates was selected. Importantly, the selected scFv clone showed a neutralizing capability against the CA16 virus and cross-reacted with viral proteins in EV71-infected lysate. Intriguingly, polyclonal IgY antibody not only showed binding specificity against proteins in CA16-infected lysate but also showed significant neutralization activities. Nevertheless, IgY-binding protein did not cross-react with proteins in EV71-infected lysate. These results suggest that the IgY- and scFv-binding protein antibodies provide protection against CA16 viral infection in in vitro assays and may be potential candidates for treating CA16 infection in vulnerable young children.