Metal-organic frameworks enable broad strategies for lithium-sulfur batteries

The lithium-sulfur (Li-S) battery is considered to be a potential next-generation power battery system, however, it is urgent that suitable materials are found in order to solve a series of challenges, such as the shuttle effect and lithium dendrite growth. As a multifunctional porous material, metal-organic frameworks (MOFs) can be used in different parts of Li-S batteries. In recent years, the application of MOFs in Li-S batteries has been developed rapidly. This review summarizes the milestone works and recent advances of MOFs in various aspects of Li-S batteries, including cathode, separator and electrolyte. The factors affecting the performance of MOFs and the working mechanisms of MOFs in these different parts are also discussed in detail. Finally, the opportunities and challenges for the application of MOFs in Li-S batteries are proposed. We also put forward feasible solutions to related problems. This review will provide better guidance for the rational design of novel MOF-based materials for Li-S batteries.     

Impact of combining data from multiple instruments on performance of patient-based real-time quality control

IntroductionIt is unclear what is the best strategy for applying patient-based real-time quality control (PBRTQC) algorithm in the presence of multiple instruments. This simulation study compared the error detection capability of applying PBRTQC algorithms for instruments individually and in combination using serum sodium as an example.Materials and methodsFour sets of random serum sodium measurements were generated with differing means and standard deviations to represent four simulated instruments. Moving median with winsorization was selected as the PBRTQC algorithm. The PBRTQC parameters (block size and control limits) were optimized and applied to the four simulated laboratory data sets individually and in combination.ResultsWhen the PBRTQC algorithm were individually optimized and applied to the data of the individual simulated instruments, it was able to detect bias several folds faster than when they were combined. Similarly, the individually applied algorithms had perfect error detection rates across different magnitudes of bias, whereas the error detection rates of the algorithm applied on the combined data missed smaller biases. The performance of the individually applied PBRTQC algorithm performed more consistently among the simulated instruments compared to when the data were combined.DiscussionWhile combining data from different instruments can increase the data stream and hence, increase the speed of error detection, it may widen the control limits and compromising the probability of error detection. The presence of multiple instruments in the data stream may dilute the effect of the error when it only affects a selected instrument.     

电力工业实现可持续发展的制度设计

电力供需存在总量性矛盾和电网约束，我国电力工业体制改革的宏观目标应定位于实现可持续发展。电力工业实现可持续发展需要切实转变发展模式，正确处理国民经济发展与环境保护的关系，把实现可持续发展纳入国家能源安全战略，要调整国家产业政策和国民经济产业结构，解决能源资源利用效率不高的问题。推进全国联网，规范、引导电力工业实现可持续发展，为经济社会和谐发展提供有力支撑。     

50Hz正弦磁场对细胞超氧产率及细胞增殖的影响

中国仓鼠肺成纤维细胞（CHL）和人脐静脉内皮细胞（HUVEC）受磁场辐照后,采用荧光光度法检测细胞的超氧产率和采用噻唑蓝比色分析法检测细胞的增殖情况。50Hz、0．4mT正弦磁场辐照30min引起CHL细胞和HUVEC细胞的超氧产率分别较对照组增加12％和19％：该磁场辐照24h导致CHL细胞和HUVEC细胞的数目分别较对照组上调9％和10％。提示50Hz、0.4mT正弦磁场促进CHL细胞和HUVEC细胞的增殖,可能与超氧自由基产率的上调有关。     

研发投入对审计费用的影响研究——基于财务柔性的调节作用

本文选择2014-2019年创业板上市公司为样本,研究企业的研发投入对审计费用的影响.研究表明:对上市公司来说,研发投入越多,当期审计费用就越高.进一步研究发现,财务柔性对研发投入和审计费用的正相关关系有抑制作用,即研发投入导致当期审计费用的增加,会随着公司财务柔性的提高而减少;与非国有相比企业相比,这种调节作用在国有企业中更加显著.在国家实施创新驱动发展战略背景下.上述结论可以为新兴企业从提高自身创新能力和资本结构方面提供建议,同时也可以为监管部门的重点关注提供思路.     

让德育之花盛开在英语教学中

英语教学不仅要注重知识的传授,而且要注重德育教育,只有把二者有机地结合起来,文道统一,才能达到教书育人的目的。     

银行个人理财业务发展的策略思考

“创造条件让更多群众拥有财产性收入。”这是“十七大”提出的深化收入分配制度改革的崭新理念。个人理财,是在对个人收入、资产、负债等数据进行分析整理的基础上,根据个人对风险的偏好和承受能力,结合预定目标运用诸如储蓄、保险、证券、外汇、收藏、住房投资等多种手段管理资产和负债,合理安排资金．从而在风险可以接受范围内实现资产增值的最大化的过程。由此,现代意义的个人理财不同于单纯的储蓄或投资,它不仅包括财富的积累,而且还囊括了财富的保障和安排．本文从银行个人理财业务相关理念入手．分析了银行个人理财业务发展中存在的问题．并有针对性地提出了加快银行个人理财业务发展的策略。     

前期延安文学对左翼文学的继承

延安文学与左翼文学紧密联系。二十世纪三十年代,大批左翼知识分子来到延安,成为前期延安文学的主要建构者。他们继承了三十年代左翼文学的文学主张,重视文学的宣传功能,主张批判暴露,积极推进文艺大众化讨论,为前期延安文学带来了生机。     

中小学教师知识分享的策略分析

教师知识分享能够有效改善教师的知识结构,增强教师知识涵养,促进教师专业化发展,从而提高学校的办学水平。本文从阐述教师知识分享的现状入手,分析阻碍教师知识分享的原因,探讨促进教师知识分享的有效路径。     

经济发展方式转变背景下青海体育产业发展状况分析

西部大开发,国家大的经济形势为体育产业发展带来的机遇。一是青海提出＂四个发展＂,加快转变发展方式,推动跨越发展、绿色发展、和谐发展、统筹发展。劳动密集型产品成本低廉的优势及潜能将得到发挥和挖掘,从而使进出口产品贸易迅速发展。青海若抓住机遇,积极寻找体育产业出口产品企业并与其合作,进入其产业加工制造链,青海体育产业将有大的发展前景。