Experimental research on temperature rise and electric characteristics of aluminum air battery under open‐circuit condition for new energy vehicle

Due to lack of systematic research on open‐circuit voltage (OCV) and electrolyte temperature rise characteristics of aluminum air battery, in order to explore the influential factors on the OCV and electrolyte temperature rise of aluminum air battery, in this paper, for the first time, we studied the effects of different ambient temperature conditions, different concentrations of NaOH and KOH electrolyte, and pure aluminum and aluminum alloy on the OCV and electrolyte temperature rise of aluminum air battery. Results show that the OCV of aluminum air battery is obviously affected by ambient temperature conditions, electrolyte concentration, and different anode materials. The OCV range is 1.5 to 1.8 V at 0°C under different KOH‐electrolyte concentrations when aluminum alloy is used as anode material; with the increase of ambient temperature, the OCV will rise, and the range is 1.8 to 1.95 V. The working process of aluminum air battery is accompanied by the phenomenon of heat release, and the temperature rise range of electrolyte will not exceed 7°C when aluminum alloy is used as the anode material; however, the highest temperature of the electrolyte can reach 100°C when pure aluminum is used as the negative electrode material. The results of this study will provide theoretical guidance for designing aluminum air batteries and identifying their optimal operating conditions.     

基于数据挖掘的开源电子资源访问行为统计模型

为了解决当前图书馆资源个性化推荐过程中存在推荐的准确率、召回率以及效率较低的问题,采用二维距离模型构建用户社区模型,用于描述访问用户与图书馆开源电子资源之间的关系,并对互联网用户需求和访问行为进行模糊规则推理.依据互联网用户属性和图书馆资源访问需求属性之间的模糊规则,建立图书馆开源电子资源访问行为统计模型,并利用该模型向用户提供个性化推荐服务.仿真结果表明,所建模型的推荐召回率高达98. 4%,推荐准确率为99. 2%,运行时间小于0. 04 s.所建模型能够为互联网用户提供准确、高效地图书馆资源个性化推荐服务.     

数字经济时代网络市场监管创新的思考

数字经济时代,新技术、新产业、新业态、新模式加速孕育,网络市场竞争态势愈加复杂、多变,监管创新成为重要课题。网络市场监管工作应当确立稳定、可预期的监管原则,并落实好包容审慎、事中事后监管、协同监管等原则;对关系到国家安全、社会稳定和公众生命健康等底线性问题,监管不能缺位,而应继续严格审查监管。从创新监管原则的宏观研究,以及大数据监管、提升电子取证能力等监管手段的具体研究等维度,对监管创新进行了深度思考。     

Assessing the Potential of Cross-border regional innovation Systems:A case study of the Hong Kong -Shenzhen region

While technological transformations have redrawn the boundaries of regional innovation systems, the effect of such transformations on the development of cross-border regional innovation systems (CBRISs) – defined here as the innovation system spanning neighboring territories belonging to different nation-states – has not been well understood. The Hong Kong-Shenzhen region presents a unique opportunity to study the potential of CBRISs, as Hong Kong and Shenzhen are adjacent to each other though there is a border between them and the two cities have their own political and legal systems under the “one country, two systems” arrangement. In this research, we examine the development of the Hong Kong-Shenzhen region by focusing on cognitive proximity, innovation actors, collaboration, and global connectivity through an analysis of patent and publication data for the 2001–2015 period. Our findings point to a good potential given the growing convergence in scientific research among the two cities, steadily increasing collaboration output, and a complementarity among innovation actors. However, compared with other cross-border regions, the technological linkages between Hong Kong and Shenzhen remain limited.     

当代影视作品中中国传统服饰文化的身份建构

服饰文化元素是影视作品的重要构成部分,在文化身份建构和文化传播中具有重要的价值。文章基于影像叙事、传承与创新、全球语境下传统服饰文化的发展等动态的、多维的视域,全面观照当代影视传统服饰文化的身份建构路径,并探讨传统服饰文化资源在影视生产中合理转化的途径。     

藏语拉萨话单音节嗓音声学参数分析

该文对藏语拉萨话单音节的嗓音特征进行了实验研究,实验首先对藏语拉萨话单音节进行语音标注,然后根据语音标注的位置信息,利用对应的程序提取音节结构中的元音和辅音的嗓音声学参数,对基频、开商和速度商分别统计分析,并做了显著性分析。实验结果表明不同元音和辅音的嗓音参数与发声方式以及其在音节中位置有关,元音和音节结构的不同会显著影响开商和速度商的值,但对于基频数据的影响并不显著。同时嗓音参数之间也存在一定的关联性,即基频和开商、速度商之间是反比关系,开商和速度商之间是正比的关系。     

晋陕蒙接壤区露天矿不同质地土壤水分运动特征与模拟

分析了晋陕蒙接壤区不同质地土壤水分运动规律，为构造一种理想的层状土体提供参考依据。设置沙土、砒砂岩、黄绵土和红黏土4种均质土柱，利用室内土柱自动观测系统测定4种矿区土壤入渗及蒸发过程，结合HYDRUS-1D模型反解土壤水力参数，并利用反解的参数模拟土壤的入渗与蒸发过程。通过湿润峰运移、入渗速率、累积入渗量评价土壤入渗性能，对比蒸发强度和移动能力评价土壤蒸发性能。研究结果表明，不同质地土壤入渗性能与蒸发性能差异较大，入渗性能从大到小排序为：沙土、砒砂岩、黄绵土、红黏土，蒸发性能从大到小排序为：黄绵土、红黏土、沙土、砒砂岩。4种土壤入渗过程模拟结果的Re（相对误差）绝对值都在11.0%以下，R2在0.90以上，沙土、黄绵土、红黏土蒸发过程模拟结果Re（相对误差）绝对值在6.1%以下，R2在0.94以上，砒砂岩因质地特殊，蒸发过程模拟结果Re（相对误差）绝对值为14.0%，R2仅为0.44，整体评价利用HYDRUS-1D结合入渗、蒸发过程剖面含水量变化反演土壤水力参数具有较高的精度。不同质地土壤水分运动特征的测定与模拟，对指导露天矿区排土场新土体构筑提供了参考。     

过级式英语学习与化工原理双语教学互促模式的实践探索——以浙江工商大学食品与生物工程学院为例

本文对比分析了国内外关于同类研究的情况,主张构建过级式英语学习与化工原理双语教学互促模式的创新基础,树立正确的双语教学观念,充分发挥过级英语学习的积极性与能动性,利用过级英语学习提高化工原理双语教学课堂学习的趣味性及语言习得,提出了过级式英语学习与化工原理双语教学互促的实践策略,以及如何分阶段开展学习小组活动的做法。