| 1 | VO2·0.2H2O nanocuboids anchored onto graphene sheets as the cathode material for ultrahigh capacity aqueous zinc ion batteries显示文摘Aqueous Zinc-ion batteries(ZIBs),using zinc negative electrode and aqueous electrolyte,have attracted great attention in energy storage field due to the reliable safety and low-cost.A composite material comprised of VO2·0.2H2O nanocuboids anchored on graphene sheets(VOG)is synthesized through a facile and efficient microwave-assisted solvothermal strategy and is used as aqueous ZIBs cathode material.Owing to the synergistic effects between the high conductivity of graphene sheets and the desirable structural features of VO2·0.2H2O nanocuboids,the VOG electrode has excellent electronic and ionic transport ability,resulting in superior Zn ions storage performance.The Zn/VOG system delivers ultrahigh specific capacity of 423 mAh·g^−1 at 0.25 A·g^−1 and exhibits good cycling stability of up to 1,000 cycles at 8 A·g^−1 with 87%capacity retention.Systematical structural and elemental characterizations confirm that the interlayer space of VO2·0.2H2O nanocuboids can adapt to the reversible Zn ions insertion/extraction.The as-prepared VOG composite is a promising cathode material with remarkable electrochemical performance for low-cost and safe aqueous rechargeable ZIBs. | Dedong Jia Kun Zheng Ming Song Hua Tan Aitang Zhang Lihua Wang Lijun Yue Da Li Chenwei Li Jingquan Liu | 2020 | Nano Research2020，13，1： | 6 |
| 2 | Understanding the Correlations between Social Attention and Topic Trends of Scientific Publications显示文摘Purpose:We propose and apply a simplified nowcasting model to understand the correlations between social attention and topic trends of scientific publications.Design/methodology/approach:First,topics are generated from the obesity corpus by using the latent Dirichlet allocation(LDA) algorithm and time series of keyword search trends in Google Trends are obtained.We then establish the structural time series model using data from January 2004 to December 2012,and evaluate the model using data from January 2013.We employ a state-space model to separate different non-regression components in an observational time series(i.e.the tendency and the seasonality) and apply the 'spike and slab prior' and stepwise regression to analyze the correlations between the regression component and the social media attention.The two parts are combined using Markov-chain Monte Carlo sampling techniques to obtain our results.Findings:The results of our study show that(1) the number of publications on child obesity increases at a lower rate than that of diabetes publications;(2) the number of publication on a given topic may exhibit a relationship with the season or time of year;and(3) there exists a correlation between the number of publications on a given topic and its social media attention,i.e.the search frequency related to that topic as identified by Google Trends.We found that our model is also able to predict the number of publications related to a given topic.Research limitations:First,we study a correlation rather than causality between topics' trends and social media.As a result,the relationships might not be robust,so we cannotpredict the future in the long run.Second,we cannot identify the reasons or conditions that are driving obesity topics to present such tendencies and seasonal patterns,so we might need to do 'field' study in the future.Third,we need to improve the efficiency of our model by finding more efficient variable selection models,because the stepwise regression method is time consuming,especially for a large number of variables.Practical implications:This paper analyzes publication topic trends from three perspectives:tendency,seasonality,and correlation with social media attention,providing a new perspective for identifying and understanding topical themes in academic publications.Originality/value:To the best of our knowledge,we are the first to apply the state-space model to examine the relationships between healthcare-related publications and social media to investigate the relationships between a topic's evolvement and people's search behavior in social media.This paper thus provides a new viewpoint in the correlation analysis area,and demonstrates the value of considering social media attention in the analysis of publication topic trends. | Xianlei Dong Jian Xu Ying Ding Chenwei Zhang Kunpeng Zhang Min Song | 2016 | Journal of Data and Information Science2016，1，1： | 1 |
| 3 | Meta-analysis on Efficacy of Yiqi Huoxue Chinese Drugs in the Treatment of Coronary Heart Disease after Coronary Revascularization显示文摘[Objectives] To make a systematic evaluation on the therapeutic efficacy and safety of Yiqi Huoxue traditional Chinese drugs combined with western medicine in treatment of coronary heart disease( CHD) after coronary revascularization. [Methods] The literatures were retrieved from China Knowledge Infrastructure( CNKI),Chinese science and technology journal full-text database( VIP database,VIP),Wanfang Data,the Chinese biomedical Database,Pub Med,Embase,and the Cochrane Library. The retrieval time was set to the creation of the database to January 2017. The randomized controlled trial( RCT) was conducted on the comparison between Yiqi Huoxue Chinese drugs combined with western medicine and the western medicine alone in the treatment of CHD after coronary revascularization. The literature information was extracted and the methodological quality of the included literature was evaluated according to the bias risk assessment tool developed by the Cochrane Collaboration. Meta-analysis was performed with the aid of Rev Man 5. 3 software. Coronary artery restenosis rate,angina pectoris treatment efficiency,left ventricular ejection fraction( LVEF),left ventricular end-diastolic volume( LVEDV),B-type natriuretic peptide( BNP),6-minute walk test( 6 MWT),and adverse reactions were analyzed. [Results] A total of 29 articles were included,a total of2 518 patients,the literature quality was low. Meta-analysis results showed that compared with the treatment by western medicine alone,Yiqi Huoxue Chinese drugs combined with western medicine could further reduce coronary restenosis rate[RR = 0. 45,95% CI( 0. 34,0. 60),P <0. 000 01],improve the angina pectoris treatment efficiency[RR = 1. 13,95% CI( 1. 05,1. 21),P = 0. 000 5],raise LVEF[WMD = 4. 25,95% CI( 3. 46,5. 04),P < 0. 000 01],reduce LVEDV[WMD =-10. 41,95% CI(-17. 88,-2. 95),P = 0. 006],decrease the plasma BNP level[WMD =-32. 32,95% CI(-44. 92,-19. 72),P < 0. 000 01],and increase 6 MWT distance(WMD = 62. 25,95% CI( 21. 71,102. 78),P = 0. 003)[Conclusions]Yiqi Huoxue Chinese drugs combined with western medicine can alleviate the symptoms of angina pectoris,reduce the rate of coronary restenosis,improve heart function and improve exercise capacity,thereby improving clinical efficacy in patients with CHD after coronary revascularization. | Yaonan DU Chenwei SONG Areyi JIAERKEN Xiaofeng WANG | 2019 | Medicinal Plant2019，10，3： | 0 |
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