摘要：This paper describes the construction and enumeration of mixed orthogonal arrays (MOA) to produce optimal experimental designs. A MOA is a multiset whose rows are the different combinations of factor levels, discrete values of the variable under study, having very well defined features such as symmetry and strength three (all main interactions are taken in consideration). The applied methodology blends the fields of combinatorics and group theory by applying the ideas of orbits, stabilizers and isomorphisms to array generation and enumeration. Integer linear programming was used in order to exploit the symmetry property of the arrays under study. The backtrack search algorithm was used to find suitable arrays in the underlying space of possible solutions. To test the performance of the MOAs, an engineered system was used as a case study within the stage of parameter design. The analysis showed how the MOAs were capable of meeting the fundamental engineering design axioms and principles, creating optimal experimental designs within the desired context.

摘要：Accurate fault detection and diagnosis is important for secure and profitable operation of modern power *** this paper,an ensemble of conflict-resolving Fuzzy ARTMAP classifiers,known as Probabilistic Multiple Fuzzy ARTMAP with Dynamic Decay Adjustment(PMFAMDDA),for accurate discrimination between normal and faulty operating conditions of a Circulating Water(CW)system in a power generation plant is *** decisions of PMFAMDDA are reached through a probabilistic plurality voting strategy that is in agreement with the Bayesian *** results of the proposed PMFAMDDA model are compared with those from an ensemble of Probabilistic Multiple Fuzzy ARTMAP(PMFAM)*** outcomes reveal that PMFAMDDA,in general,outperforms PMFAM in discriminating operating conditions of the CW system.

摘要：开发高性能固态聚合物电解质是高安全、高比能固态锂金属电池的关键.然而,固态聚合物电解质的低离子电导率和不稳定的电解质/电极界面阻碍了其广泛应用.针对上述关键问题,本文基于聚环氧乙烷(PEO)基电解质,引入具有双功能的氟化铝(AlF_(3))做为添加剂,以提高复合电解质的离子电导率和界面稳定性.一方面,AlF_(3)做为一种强路易斯酸,在和锂盐阴离子相互作用下可以促进锂盐的解离,同时可以固定阴离子,从而提高锂离子传输效率;另一方面,AlF3在电解质/电极界面可以和锂金属原位反应生成富含LiF的界面层,从而抑制锂金属的不均匀沉积以及与PEO基体之间持续的副反应.得益于我们的合理设计,匹配改性后电解质的Li/Li对称电池可以稳定循环3600 h以上.同时,在2.4-4.2 V电压区间内,匹配复合电解质的全固态LiFePO4全电池在150个循环之后库伦效率比没有AlF3添加剂PEO基电解质大大提升(98.4%vs.63.3%),匹配复合固态电解质的固态锂金属电池显示出优异的界面稳定性和循环稳定性.

摘要：Resistive Plate Chamber （RPC） modules will be used as one part of the cosmic muon veto system in the Daya Bay reactor neutrino experiment. A total of 189 RPC modules will cover the three water pools in the experiment. To achieve track reconstruction and high efficiency, each module consists of 4 layers, each of which contains two sizes of bare chambers. The placement of bare chambers is reversed in different layers to reduce the overlapping dead areas. The module efficiency and patch emciency were studied both in simulation and test of the data analysis. 143 modules have been constructed and tested. The preliminary study shows that the module and patch 3 out of 4 layers efficiency reaches about 98%.

摘要：用机械合金化方法制备可降解Mg-Zn合金,并用分式析因设计法建立统计学模型来预测块体合金的弹性模量和腐蚀质量损失。研究机械合金化参数(球磨时间、球磨速度、球料比和Zn含量)及其交互作用对合金性能的影响,共涉及4因素2次重复,因此进行了16次2水平分式析因设计。方差分析(ANOVA)、回归分析和R2测试结果表明此模型预测精度高。统计模型预测的可降解Mg-Zn合金的弹性模量为40.18~47.88 GPa,类似于自然骨(30-57 GPa)。添加质量分数为3%~10%Zn(9.32~15.38 mg)后,可以改善合金的耐腐蚀性能,腐蚀后纯Mg质量损失约33.74 mg。最显著的自变量是Zn含量,且只有球磨时间和球料比的交互作用具有显著性,P值小于0.05。建立的模型可以从统计学上有效预测可降解Mg-Zn合金的力学性能(通过弹性模量反映)和耐腐蚀性能(通过重量损失反映)。

摘要：作为碳中和的重要能源载体,利用可再生能源电解水制取的“绿色氢能”受到了全世界的关注.聚合物电解质水电解槽因其优越的性能,有望成为未来绿色制氢市场的主流.当前,聚合物电解质水电解槽的发展受到膜电极发展缓慢的制约.膜电极是聚合物电解质水电解槽的重要组成部分,在很大程度上决定了水电解槽系统的成本和性能.因此,必须从降低成本和提高性能方面对膜电极组件进行优化,以促进其发展.在这篇综述中,我们首先讨论了膜电极材料的最新进展及现有的设计策略,包括催化剂的成本、活性和稳定性、离聚物的分布和厚度以及离子交换膜的离子传输效率.然后分析了所有组分和层间界面对膜电极中离子、电子和物质传输的影响,以及对电解槽性能的影响.最后,本论文就催化剂活性、离子交换膜稳定性、相邻组分之间的界面以及性能评估方法等方面提出了相关建议和展望.

摘要：高效圆偏振发光材料在传感、光学器件、不对称合成等领域有着广泛的应用,设计和制备圆偏振发光材料引起了人们的广泛关注.然而,构筑具有高发光不对称因子的圆偏振发光材料仍然是一个挑战.这里,我们制备了一种手性超分子组装金属大环,该超分子组装金属大环可以通过分子间铂···铂相互作用诱导逐级自组装促进圆偏振光的放大.值得注意的是,超分子组装金属大环显示出高的发光不对称因子以及较强的圆偏振光信号,而其对应的组装配体没有显示出圆偏振光信号.通过紫外-可见吸收光谱和发射光谱、核磁共振氢谱、扫描电镜、透射电镜、原子力显微镜、粗粒化分子动力学模拟和含时密度泛函理论计算等手段对圆偏振光放大的机理进行了研究.该研究展示了第一例基于铂···铂相互作用驱动的逐级自组装策略制备的高效圆偏振发光材料.

摘要：This paper presents a free viewpoint video(FVV)system based on ray-space interpolation *** new algorithm matches individual pixels in corresponding scanline pairs by using a dynamic program-ming technique.A sparse intermediate view disparity map is projected from matched pixels firstly,andthe holes(occluded pixels)are filled in by propagating the disparity of neighboring background *** interpolating dense view images,an arbitrary virtual view image can be easily rendered from thedense ray-space converted from these view *** proposed method is evaluated on the Middleburydata set arid compared with other methods,experimental results show that the better quality of the inter-mediate view is obtained and the corresponding computational complexity is reduced significantly.

摘要：研究在日本传统"诗吟"表演中,在干信号中加上适当时延的单个反射声是否更为有利.专业"诗吟"表演者嗓音中对典型的"节"的吟唱是该种表演艺术的一种独特的吟咏方式.对此及对"节"外内容的吟唱都在消音室中加以录音.文中通过成对比较法试验得出了主观优选的标度值.结果表明,在聆听对"节"的吟唱时,听者更喜欢在干信号中加上延时为10～30ms的单个反射声,而在聆听对"节"外内容的吟唱时,加上单个反射声与否对听者而言并无显著的差别.文中对此项发现从吟唱"节"的声源信号的自相关函数的包络特征上加以讨论.