科创中国

《湘报》对近代传媒进行合法性论证时,以提高国家竞争力,应付民族危机为核心,其逻辑路径从如下三个方面展开:危机时刻的情境定义、民智愚昧的归因分析与广办新报的求解策略.这种合法性论证逻辑,具有政治化思维、功能论文明观与志士精神的特征,引发了知识界的巨大反响,掀起了办报高潮.但因忽视民众要求,学理系统性不强,深刻影响了近代传媒在中国的出场路径与面貌形态.

Computer-based conceptual design for routine design has made great strides, yet non-routine design has not been given due attention, and it is still poorly automated. Considering that the function-behavior-structure(FBS) model is widely used for modeling the conceptual design process, a computer-based creativity enhanced conceptual design model(CECD) for non-routine design of mechanical systems is presented. In the model, the leaf functions in the FBS model are decomposed into and represented with fine-grain basic operation actions(BOA), and the corresponding BOA set in the function domain is then constructed. Choosing building blocks from the database, and expressing their multiple functions with BOAs, the BOA set in the structure domain is formed. Through rule-based dynamic partition of the BOA set in the function domain, many variants of regenerated functional schemes are generated. For enhancing the capability to introduce new design variables into the conceptual design process, and dig out more innovative physical structure schemes, the indirect function-structure matching strategy based on reconstructing the combined structure schemes is adopted. By adjusting the tightness of the partition rules and the granularity of the divided BOA subsets, and making full use of the main function and secondary functions of each basic structure in the process of reconstructing of the physical structures, new design variables and variants are introduced into the physical structure scheme reconstructing process, and a great number of simpler physical structure schemes to accomplish the overall function organically are figured out. The creativity enhanced conceptual design model presented has a dominant capability in introducing new deign variables in function domain and digging out simpler physical structures to accomplish the overall function, therefore it can be utilized to solve non-routine conceptual design problem.

Eddy current pulsed thermography(ECPT) is an emerging Non-destructive testing and evaluation(NDT & E) technique, which uses hybrid eddy current and thermography NDT & E techniques that enhances the detectability from their compensation. Currently, this technique is limited by the manual selection of proper contrast frames and the issue of improving the efficiency of defect detection of complex structure samples remains a challenge. In order to select a specific frame from transient thermal image sequences to maximize the contrast of thermal variation and defect pattern from complex structure samples, an energy driven approach to compute the coefficient energy of wavelet transform is proposed which has the potential of automatically selecting both optimal transient frame and spatial scale for defect detection using ECPT. According to analysis of the variation of different frequency component and the comparison study of the detection performance of different scale and wavelets, the frame at the end of heating phase is automatically selected as an optimal transient frame for defect detection. In addition, the detection capabilities of the complex structure samples can be enhanced through proper spatial scale and wavelet selection. The proposed method has successfully been applied to low speed impact damage detection of carbon fibre reinforced polymer(CFRP) composite as well as providing the guidance to improve the detectability of ECPT technique.

美国公共行政理论中的管理主义范式经历了萌芽、形成、拓展和成熟四个发展阶段.实证主义是管理主义的哲学基础,因为实证主义为管理主义提供了方法论基础,而管理主义是实证主义在管理领域的具体应用.美国公共行政理论中的管理主义是在与宪政主义的争论中得以发展和完善的,其理论体系由单一化、片面化逐渐走向多元化、系统化;理论研究由注重经济、效率价值转向既注重经济、效率价值,又兼顾人本价值,这是美国公共行政理论中管理主义发展的内在逻辑.

对河北省石津灌区总千渠闸门控制系统构建的重要性和必要性进行了分析,针对灌区具体情况提出了闸控系统的设计原则,选择了主从结构、分布式实时监测方式,闸门的控制选择了现地控制、远程监测模式,可以实现多重控制手段来保证系统安全有效的运行.文章对系统进行了详细的总体设计,并分别阐述了现地监控站的结构组成、闸控系统应实现的功能和软件的性能、可实现功能等内容.总结了系统建设经验和今后系统运行维护时的重点,为同类型灌区提供了一定的经验和借鉴.

基于节能减排的目的,对中央空调控制系统实施改造.首先分析了中央空调系统的运行现状,阐述了中央空调系统的构成和变频节能原理,继而采用PLC和变频控制相结合的温差法控制方案对原有系统进行改造,给出了设计方案,进行了变频器的参数设置,并进行了节能分析.最后指出了中央空调采用变频调速控制具有较好的实用价值和发展前景.