Sn-Co薄膜电极界面过程原位傅里叶变换红外光谱表征

锂离子电池的界面反应对电池的循环性能、寿命、化学和物理稳定性,以及不可逆容量有重要的影响.运用显微傅里叶变换红外光谱(microscope FTIRS,MFTIRS)深入地研究了Sn-Co电极的界面反应和过程.结果表明,原位显微傅里叶变换红外光谱可清楚地给出Sn-Co合金的嵌锂和脱锂过程中的溶剂化和去溶剂化信息.     

科技优先领域项目评价体系研究

统筹有限的科技资源,优先支持科研效力高、科技潜力大的科研领域、方向和项目是科技管理工作的重点。在综合分析国内外科技项目评价体系基础上,结合我国科技发展和科技管理的实践,在国家创新方法研究专项——10000个技术难题评价方法研究项目的初步支持下,我们初步建立了基于结构分析的科技项目优先度评价体系（SPE—SA）。     

Ultrafast dynamics and dissociative ionization of CS<Subscript>2</Subscript> molecules studied via the femtosecond pump-probe method

The ultrafast dynamics and dissociative ionization of CS2 were studied using the pump-probe method with time-of-flight mass spectroscopy. The transient behavior of both parent ion (CS2+) and fragment ions (S+ and CS+) was observed. It was found that all the ionic signals decay exponentially with lifetimes that were different for delay times, t>0 and t<0, which can be attributed to the evolution of different Rydberg states pumped by 267-nm and 400-nm laser pulses. The lifetimes of two Rydberg states were obtained simultaneously from one fitting of the transients. The fragment ions were produced by the dissociation of CS2+, and it is suggested that the final ionic state is the C2Σg+ state of CS2+ based on the measured S+/CS+ branching ratio. The S+/CS+ ratio is dependent on the delay time of the two lasers, indicating that the dissociation process of CS2+ is related to the evolution of the intermediate Rydberg state.     

武汉市屋顶农业调查研究——以武汉市汉阳十里铺社区为例

从设施结构、生产方式、栽培植物种类、栽培技术、环境及其调控等方面对武汉市汉阳十里铺一处屋顶农业示范基地进行实地调查,分析了武汉市屋顶农业的发展现状以及存在的问题,并对武汉市屋顶农业发展中的共性关键技术进行探讨,并提出了相应的改进建议,以期为武汉市屋顶农业建设提供参考依据.     

管模用21CrMo10材料的研制

研制了新型管模用２１ＣｒＭｏ１０钢,试验结果表明该钢具有良好的淬透性,焊接性能和综合机械性能。     

基于交通流预测的高速公路收费站车道开闭配置

针对高速公路收费站的收费车道资源分配不均问题,结合贝叶斯优化算法（bayesian optimization algorithm, BOA）和长短时记忆神经网络（long short term memory, LSTM）,提出了一种基于交通流预测的收费车道开闭配置方法。首先,对收费数据进行预处理,得到交通量、车型比例、收费方式占比和服务时间等基础数据,用于构建模型训练数据集。其次,提出了一种基于多元收费方式的M/G/K排队模型,实现收费站通行过程的理论描述和平均排队长度、平均逗留时间、通行能力等关键指标的计算。然后,针对超参数设置困难问题,引入贝叶斯优化算法构建了BOA-LSTM组合模型实现交通流预测。接着,以交通流预测结果为输入,以车道开启数目为输出,构建了一种以综合成本最小为目标的车道开闭配置模型。最后,以河北新元高速机场收费站为例展开实证分析,结果表明,BOA-LSTM组合模型能够取得良好的预测效果,其中交通量和车型比例的均方根误差分别为16.24和0.03,平均绝对百分比误差分别为13.32%和1.77%;相比于实际方案,工作日平均每天的综合成本降低了2.30%,休息日平均每天的综合成本降低了5.14%。     

全静电型空气净化机净化空气效果的研究

由于室内空气环境受到烟雾与尘土的污染,同时受室内建筑材料设施释放出的有害气体及人体代谢产物的污染（特别是空调房内空气不流通）,因此室内污染比室外严重,改善室内空气质量就成为现代生活的一个重要课题。本文研究的是有别于传统的活性碳型和单纯负离子发生器的全静电型空气净化机,研究结果表明：全静电型空气净化机可净化空气中的一氧化碳、二氧化碳、烟雾、细菌,并散发出大量有利于身体健康的负离子,而且收尘过滤元件不须更换。     

中主应力对土体本构关系的影响

本文根据常规三轴试验和平面应变试验结果,对以常规三轴试验为基础的土体本构模型在平面变形问题中的适用性进行了研究.文中用双曲线模型和双屈服面弹塑性模型对两种试样的变形进行了计算比较.结果表明,两种模型用于平面问题都有误差,主要是由于两模型中所含破坏准则没有很好反映中主应力影响所致;中主应力主要通过对破坏准则的影响来影响本构关系.改进破坏准则,变形计算可得到很大改善.     

Recursive Algorithm Based Reliability Analysis of Multiphase Satellite Systems with Propagated Failures

Modern satellite systems are generally designed to fulfill multiphase-missions. Component /subsystem redundancies are commonly used to achieve high reliability and long life of modern satellite systems. These characteristics have leaded to a critical issue of reliability analysis of satellites that is how to deal with the reliability analysis with multiphase-missions and propagated failures of redundant components. Traditional methods based on the binary decision diagram( BDD) can hardly cope with these issues efficiently. Accordingly, a recursive algorithm method was introduced to facilitate the reliability analysis of satellites. This method was specified for the analysis of static fault tree and it was implemented by generating combination of component failures and carrying out a backward recursive algorithm. The effectiveness of the proposed method was demonstrated through the reliability analysis of a multiphase satellite system with propagated failures.The major advantage of the proposed method is that it does not need composition of BDD and its computational process is automated.     

陶瓷与有机PTC热敏电阻高频特性研究

简述了陶瓷PTC热敏电阻和有机PTC热敏电阻的特性，介绍了2类PTC热敏电阻的PTC效应原理，并就2类PTC热敏电阻高频特性结合试验测量结果进行了分析，陶瓷PTCR采用的测试信号频率为10kHz-10MHz，有机PTCR所采用的测试信号频率为10kHz-6GHz，结果表明有机PTCR较陶瓷PTCR有良好的高频过流保护特性，这说明有机PTCR更适合用于高频过流保护。