In situ backscattered electron imaging study of the effect of annealing on the deformation behaviors of Ni electroformed from additive-free and saccharin-containing sulfamate solutions

The Ni samples were electroformed from additive-free(AF) and saccharin-containing(SC) sulfamate solutions, respectively. In situ backscattered electron(BSE) imaging, electron backscatter diffraction(EBSD), and electron-probe microanalysis(EPMA) were used to investigate the effect of annealing on the deformation behaviors of the AF and SC samples. The results indicate that columnar grains of the as-deposited AF sample had an approximated average width of 3 μm and an approximated aspect ratio of 8. The average width of columnar grains of the as-deposited SC sample was reduced to approximately 400 nm by the addition of saccharin to the electrolyte. A few very-large grains distributed in the matrix of the SC sample after annealing. No direct evidence indicated that S segregated at the grain boundaries before or after annealing. The average value of the total elongations of the SC samples decreased from 16% to 6% after annealing, whereas that of the AF samples increased from 18% to 50%. The dislocation recovery in grain-boundary areas of the annealed AF sample was reduced, which contributed to the appearance of microvoids at the triple junctions. The incompatibility deformation between very-large grains and fine grains contributed to the brittle fracture behavior of the annealed SC Ni.     

Topic-Feature Lattices Construction and Visualization for Dynamic Topic Number

The topic recognition for dynamic topic number can realize the dynamic update of super parameters, and obtain the probability distribution of dynamic topics in time dimension, which helps to clear the understanding and tracking of convection text data. However, the current topic recognition model tends to be based on a fixed number of topics K and lacks multi-granularity analysis of subject knowledge. Therefore, it is impossible to deeply perceive the dynamic change of the topic in the time series. By introducing a novel approach on the basis of Infinite Latent Dirichlet allocation model, a topic feature lattice under the dynamic topic number is constructed. In the model, documents, topics and vocabularies are jointly modeled to generate two probability distribution matrices: Documentstopics and topic-feature words. Afterwards, the association intensity is computed between the topic and its feature vocabulary to establish the topic formal context matrix. Finally, the topic feature is induced according to the formal concept analysis(FCA) theory. The topic feature lattice under dynamic topic number(TFL DTN) model is validated on the real dataset by comparing with the mainstream methods. Experiments show that this model is more in line with actual needs, and achieves better results in semi-automatic modeling of topic visualization analysis.     

基于产品基因的无人探测小车概念设计方法

为解决概念设计阶段由于设计约束和关键信息模糊不全,导致设计者在进行设计时具有一定的盲目性,且设计出的方案可行性难以保证的问题,提出一种基于产品基因的概念设计方法,创建了概念设计过程模型.在此基础上,提出了产品基因的概念和结构及一种基于功能元的产品基因编码方法.以无人探测小车为例对基于产品基因的概念设计方法进行了说明.结果表明该方法能够使影响概念设计的关键产品信息明确化,降低设计的盲目性,从而提高设计方案的可行性和设计效率.      

通用试题库的研究与开发

介绍了通用试题库的设计与实现,利用这种方法开发的试题库可以实现考试工作的现代化管理。     

解杨分离式立交连续箱梁施工简述

解杨分离式立交是运城绕城高速公路西南段的一座上跨分离式立交,桥梁中心桩号为K12＋239。重点介绍了该桥的主桥上连续箱梁混凝土浇筑以及张拉施工技术。     

可变抽样区间的HL控制图

研究了基于VSI的Hodges-Lehmann控制图,与原来的FSI Hodges-Lehmann控制图相比,效率上有极大的提高.     

财政政策背景下的家庭教育投资行为分析

概述了国内外对公共教育投资和家庭教育投资的研究,选择新古典经济学中的家长最优化框架来构建家庭教育投资的一般模型.在此基础上,引入了3类公共教育财政政策,即强制供给、收入补贴和专项补贴.重点考察了在这3类教育财政背景下家庭教育投资的行为,并对一般模型和这3类模型的结论做了进一步的比较分析,为教育财政政策的制定提供了一些可行建议.     

基于效益最大化的桥梁检修决策模型

运用贝叶斯分析方法,建立一种确定桥梁检修策略的动态模型,该模型包含了多阶段的"信息收集--数据分析--决策"过程,同时将先验信息和检查信息相结合,为决策提供更加充分的数据支持.算例考虑了两种检查方案和4种维修方案集,以检查净效益最大化为目的,在分析基准期内设计最佳的检查时间和检查方案,然后以维修综合成本最小为原则对可能出现的检查结果制定最佳维修方案.     

农村养老保险法律制度研究

从我国农村养老的现状入手，分析了我国农村养老保险法律制度及其实施过程中存在的问题，在借鉴国外（主要是德国和日本）的农村养老保险模式的基础上，从立法及法律的实施角度提出了完善农村社会养老保险法律制度的建议。     

跨国公司全球技术垄断的目的、成因及后果

在科技全球化的背景下,只有垄断才有竞争力,当然这种垄断是通过竞争产生的。技术开发竞争是为了形成技术垄断,技术垄断是为了控制和巩固竞争地位,是为了获得实现长期的控制市场从而达到技术垄断利润的最大化。本文在分析跨国公司技术垄断目的及成因的基础上,从三个方面研究了跨国公司全球技术垄断性利用的后果,认为中国企业应该在自主创新过程中学会并运用技术垄断战略,通过"干中学"提高中国企业的技术垄断竞争力。