An Antidiffusive Entropy Scheme for Monotone Scalar Conservation Laws

In a recent work J. Sci. Comput. 16, 479–524 (2001), B. Després and F. Lagoutière introduced a new approach to derive numerical schemes for hyperbolic conservation laws. Its most important feature is the ability to perform an exact resolution for a single traveling discontinuity. However their scheme is not entropy satisfying and can keep nonentropic discontinuities. The purpose of our work is, starting from the previous one, to introduce a new class of schemes for monotone scalar conservation laws, that satisfy an entropy inequality, while still resolving exactly the single traveling shocks or contact discontinuities. We show that it is then possible to have an excellent resolution of rarefaction waves, and also to avoid the undesirable staircase effect. In practice, our numerical experiments show second-order accuracy.     

中性点不接地或高阻接地系统接地故障定位方法探究

本文提出了一种中性点不接地或高阻接地系统接地故障定位的新方法.该方法采 用相对电压算法原理,将数字继电器、零序信号发生器和远距离接地故障指示器相结合,能 处理间歇性故障和多重故障的问题,能识别反向接地故障。     

人体舒适度指数对用电负荷的影响

通过引入人休舒适度指数这一气象新概念，对电网负荷与气象变化之间的关系进行相关性、离散性和灵敏度分析。通过对南京电网的分析可得，相对于日最高气温、日最低气温而言，使用人体舒适度指数更能准确表明日最大负荷的变化。     

有色金属行业科技创新投入与产出评价指标体系研究

为了构建有色金属行业利．技创新的投入与产出评价指标体系，在明确投入与产出指标选取原则的基础上，初步选取了投入指标与产出指标，并运用灰色关联度分析方法进一步确定了投入与产出指标，从而科学地建立了有色金属行业科技创新的投入与产出评价指标体系。运用信息熵值法客观地确定了各个指标的权重．并给出了具体的测算公式。     

道路运输统计实际操作方法的探讨

本文阐述新形势下道路运输统计工作的基本现状，存在的问题，道路运输统计工作的重要性；做好道路运输统计工作的基本要求，如何加强道路运输统计的基础工作，提高统计数据质量，如何准确反映道路客货运输发展状况都作了说明；并对道路客货运输统计的统计指标进行了研究。     

我国城市竞争力研究的现状评析与创新思考

城市竞争力及其评价是近年来我国城市研究的热点问题。论文在综合分析国内城市竞争力研究现状的基础上，指出了当前研究的不足及其深刻意义，并结合我国城市发展的总体趋势，提出了城市竞争力研究应该在研究视角、研究方法等方面进行创新，以推动城市的可持续发展。     

电缆故障指示器及其使用情况评析

本文通过介绍近年来在广州供电分公司配网中使用较为广泛的三种电缆故障指示器,分析论述了其在查找故障点等方面的优势,同时也指出了其在使用过程中存在的问题,并提出了解决问题的方法。     

Optical CO2 sensor with the combination of colorimetric change of α-naphtholphthalein and internal reference fluorescent porphyrin dye

A new optical CO₂ sensor based on the overlay of the CO₂ induced absorbance change of pH indicator dye α-naphtholphthalein with the fluorescence of tetraphenylporphyrin (TPP) was developed. The observed luminescence intensity from TPP at 655 nm increased with increasing the CO₂ concentration. The ratio I₁₀₀/I₀ values of the sensing films consisting of α-naphtholphthalein in ethyl cellulose layer and TPP in polystyrene layer, where I₀ and I₁₀₀ represent the detected luminescence intensities from a layer exposed to 100% nitrogen and 100% CO₂, respectively, that the sensitivity of the sensor, are more than 53.9. The response and recovery times of the sensing films consisting of α-naphtholphthalein in ethyl cellulose layer and TPP in polystyrene layer were less than 5 s for switching from nitrogen to CO₂, and for switching from CO₂ to nitrogen. The signal changes were fully reversible and no hysterisis was observed during the measurements. The highly sensitive optical CO₂ sensor based on fluorescence intensity changes of TPP due to the absorption change of α-naphtholphthalein with CO₂ was achieved.     

Production Rate‐Dependent Key Performance Indicators for a Systematic Design of Biochemical Downstream Processes

Key performance indicators have become a common tool in bioprocess development, as they allow an objective and independent rating and ranking of process alternatives screened. A disadvantage of all key performance indicators developed so far is their strong focus on costs, which makes them neglect the influence of the production rate on the profit of the process. But, since both production costs and production rate have an equally strong impact, both should be considered when decisions have to be made. Therefore, two new key performance indicators are introduced in this work, one for batch and one for continuous processing. They combine product yield, purity performance, variable manufacturing costs, and production rate to one objective. Thereby, misguided trade‐offs between these four individual measures can be replaced by one key performance indicator. This ensures a systematic development of biochemical downstream processes.     

云制造环境下服务监管角色的评估与选择

为加强对云制造环境下服务模式的监管,在分析概括已有三类制造服务模式的基础上,从安全性的角度考虑,提出一种基于可信第三方监管的云制造服务模式,并针对第三方监管角色的评估与选择问题,从三个维度构建其可信评估指标体系,采用网络分析法进行计算。通过实例分析了云制造环境下可信第三方服务监管角色评估与选择的具体过程。