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| 1 | Recent advances in anode materials for potassium-ion batteries:A review显示文摘Potassium-ion batteries(PIBs)are appealing alternatives to conventional lithium-ion batteries(LIBs)because of their wide potential window,fast ionic conductivity in the electrolyte,and reduced cost.However,PIBs suffer from sluggish K+reaction kinetics in electrode materials,large volume expansion of electroactive materials,and the unstable solid electrolyte interphase.Various strategies,especially in terms of electrode design,have been proposed to address these issues.In this review,the recent progress on advanced anode materials of PIBs is systematically discussed,ranging from the design principles,and nanoscale fabrication and engineering to the structure-performance relationship.Finally,the remaining limitations,potential solutions,and possible research directions for the development of PIBs towards practical applications are presented.This review will provide new insights into the lab development and real-world applications of PIBs. | Lianbo Ma Yaohui Lv Junxiong Wu Chuan Xia Qi Kang Yizhou Zhang Hanfeng Liang Zhong Jin | 2021 | Nano Research2021，14，12： | 6 |
| 2 | Crop positioning for robotic intra-row weeding based on machine vision显示文摘A machine-vision-based method of locating crops is described in this research.This method was used to provide real-time positional information of crop plants for a mechanical intra-row weeding robot.Within the normalized red,green,and blue chromatic coordinates(rgb),a modified excess green feature(g-r>T&g-b>T)was used to segment plant material from back ground in color images.The threshold T was automatically selected by the maximum variance(OTSU)algorithm to cope with variable natural light.Taking into account the geometry of the camera arrangement and the crop row spacing,the target regions covering the crop rows were defined based on a pinhole camera model.According to the statistical variation in the pixel histogram in each target region,locations of the crop plants were initially estimated.To obtain the accurate locations of crops,median filtering was conducted locally in the bounding boxes of the crops close to the bottom of the images.For the lateral guidance of the robot,a novel method of calculating lateral offset was proposed based on a simplified match between a template and the detected crops.Field experiments were conducted under three different illumination conditions.The results showed that the accurate identification rates on lettuce,cauliflower and maize were all above 95%.The positional error as within±15 mm,and the average processing time for a 640×480 image was 31 ms.The method was adequate to meet the technical requirement of the weeding robot,and laid a foundation for robotic weeding in commercial production system. | Li Nan Zhang Chunlong Chen Ziwen Ma Zenghong Sun Zhe Yuan Ting Li Wei Zhang Junxiong | 2015 | International Journal of Agricultural and Biological Engineering2015，8，6： | 4 |
| 3 | Direct and green repairing of degraded LiCoO_(2) for reuse in lithium-ion batteries显示文摘Traditional recycling processes of LiCoO_(2) rely on destructive decomposition,requiring high-temperature roasting or acid leaching to extract valuable Li and Co,which have significant environmental and economic concerns.Herein,a direct repairing method for degraded LiCoO_(2) using a LiCl–CH_(4)N_(2)O deep eutectic solvent(DES)was established.The DES is not used to dissolve LiCoO_(2) but directly serves as a carrier for the selective replenishment of lithium and cobalt.Replenishment of lithium restores LiCoO_(2) at different states of charge to a capacity of 130 m Ah/g(at 0.1 C rate),while replenishing the cobalt increases the capacity retention rate of 90%after 100 cycles,which is comparable to pristine LiCoO_(2).The DES is collected and reused multiple times with a high repair efficiency.This process reduces energy consumption by 37.1%and greenhouse gas emissions by 34.8%compared with the current production process of LiCoO_(2),demonstrating excellent environmental and economic viability. | Junxiong Wang Qi Zhang Jinzhi Sheng Zheng Liang Jun Ma Yuanmao Chen Guangmin Zhou Hui-Ming Cheng | 2022 | National Science Review2022，9，8： | 4 |
| 4 | Meta analysis of olfactory ensheathing cell transplantation promoting functional recovery of motor nerves in rats with complete spinal cord transection显示文摘OBJECTIVE:To evaluate the effects of olfactory ensheathing cell transplantation on functional recovery of rats with complete spinal cord transection.DATA SOURCES: A computer-based online search of Medline(1989–2013),Embase(1989–2013),Cochrane library(1989–2013),Chinese Biomedical Literature Database(1989–2013),China National Knowledge Infrastructure(1989–2013),VIP(1989–2013),Wanfang databases(1989–2013) and Chinese Clinical Trial Register was conducted to collect randomized controlled trial data regarding olfactory ensheathing cell transplantation for the treatment of complete spinal cord transection in rats.SELECTION CRITERIA: Randomized controlled trials investigating olfactory ensheathing cell transplantation and other transplantation methods for promoting neurological functional recovery of rats with complete spinal cord transection were included in the analysis.Meta analysis was conducted using Rev Man 4.2.2 software.MAIN OUTCOME MEASURES: Basso,Beattie and Bresnahan scores of rats with complete spinal cord transection were evaluated in this study.RESULTS: Six randomized controlled trials with high quality methodology were included.Meta analysis showed that Basso,Beattie and Bresnahan scores were significantly higher in the olfactory ensheathing cell transplantation group compared with the control group(WMD = 3.16,95% CI(1.68,4.65); P < 0.00001).CONCLUSION: Experimental studies have shown that olfactory ensheathing cell transplantation can promote the functional recovery of motor nerves in rats with complete spinal cord transection. | Jun Liu Ping Chen Qi Wang Yu Chen Hailong Yu Junxiong Ma Mingming Guo Meihui Piao Weijian Ren Liangbi Xiang | 2014 | Neural Regeneration Research2014，9，20： | 4 |
| 5 | A new design of automatic vertical drilling tool显示文摘In order to effectively improve penetration rates and enhance wellbore quality for vertical wells,a new Automatic Vertical Drilling Tool(AVDT)based on Eccentric Braced Structure(EBS)is designed.Applying operating principle of rotary steering drilling,AVDT adds offset gravity block automatic induction inclination mechanism.When hole straightening happens,tools take essentric moment to be produced by gravity of offset gravity lock to control the bearing of guide force,so that well straightening is achieved.The normal tool's size of the AVDT is designed as 215.9 mm,other major components'sizes are worked out by the result of theoretical analysis,including the offset angle of EBS.This paper aims to introduce the structure,operating principle,theoretical analysis and describe the key components'parameters setting of the AVDT. | Yanfeng Ma Hongquan Xia Junxiong Fu Peng Yang | 2015 | Petroleum2015，1，3： | 3 |
| 6 | Feature extraction of jujube fruit wrinkle based on the watershed segmentation显示文摘The degree of surface wrinkles on a dried jujube fruit(Ziziphus jujuba Mill.)is an important quality grading criterion.The aim of this research was to propose an image processing method based on the watershed segmentation to extract the wrinkle features of jujube fruits.Original images of jujube fruit taken under cyan light were transformed into grayscale images.The noise in these images was then removed by morphological reconstruction.The H-minima extended transformation was used to label the foreground of jujube fruit images after reconstruction,and the labeled foreground regions were segmented by a distance transform-based watershed algorithm.Then,the grayscale images were filtered with a local range filter.The segmentation function was obtained using the minima imposition method.Finally,a watershed segmentation was used to extract the wrinkle features of jujube fruits.Experiments on 304 images of jujube fruit showed that the accuracy of wrinkle-based grading obtained by the algorithm was 92.11%,which proved that this method could be used to classify jujube wrinkles. | Zhang Junxiong Ma Qingqing Li Wei Xiao Tingting | 2017 | International Journal of Agricultural and Biological Engineering2017，10，4： | 2 |
| 7 | Analysis of moisture and total sugar content of Huizao based on surface images显示文摘Moisture and total sugar content are two important internal qualities of Huizao.In order to explore their correlation with external qualities,a novel method of moisture and total sugar content analysis was proposed based on surface images.Firstly,five geometric features and seven texture features of Huizao were obtained to be the external quality indexes by digital image processing technology.Secondly,the wrinkle degree as an important index was extracted by marked watershed segmentation algorithm.According to the external quality the Huizao samples were grouped,and the moisture and total sugar content were determined through physical and chemical methods.Lastly,the moisture and total sugar content and twelve external indexes were all processed by step discriminatory analysis.Meanwhile,the regression models of moisture content with short diameter,contrast,and wrinkle degree and total sugar with wrinkle degree were established.The coefficients of the model were 0.9992 and 0.9978 respectively,and all the significance was less than 0.01,which show that the regression equation and regression coefficient effect are highly significant.The results indicate that the moisture and total sugar content of Huizao are greatly correlated with the wrinkle degree.The moisture and total sugar content are the highest when the wrinkle degree is at 2 to 3 grade,and they decrease gradually with the wrinkle degree increasing.Moisture content shows positive correlation with the size of Huizao.The results of model analysis agree well with the experimental results,which can provide valuable reference for improving Huizao grade diversity. | Junxiong Zhang Qingqing Ma Fen He Feng Qu Wei Li | 2018 | International Journal of Agricultural and Biological Engineering2018，11，4： | 0 |
| 8 | State fragility and the coronavirus disease 2019(COVID-19)pandemic:an ecologic analysis of data from 146 countries显示文摘Background:Global spread and impact of the coronavirus disease 2019(COVID-19)pandemic are determined to a large extent,by resistance to the pandemic and public response of all countries in the world;while a country's resistance and response are in turn determined by its political and socio economic conditions.To inform future disease prevention and control,we analyzed global data to exam the relationship between state vulnerabilities and COVID-19 incidences and deaths.Methods:Vulnerability was measured using the Fragile States Index(FSI).FSI is created by the Fund for Peace to assess levels of fragility for individual countries.Total FSI score and scores for 12 specific indicators were used as the predictor variables.Outcome variables were national cumulative COVID-19 cases and deaths up to September 16,2020,derived from the World Health Organization.Cumulative incidence rates were computed using 2019 National population derived from the World Bank,and case fatality rates were computed as the ratio of deaths/COVID-19 cases.Countries with incomplete data were excluded,yielding a final sample of 146 countries.Multivariate regression was used to examine the association between the predictor and the outcome measures.Results:There were dramatic cross-country variations in both FSI and COVID-19 epidemiological measurements.FSI total scores were negatively associated with both COVID-19 cumulative incidence rates(β=-0.0135,P<0.001)and case fatality rates(β=-0.0147,P<0.05).Of the 12 FSI indicators,three negatively associated with COVID-19 incidences were E1(Economic Decline and Poverty),E3(Human Flight and Brain Drain),and S2(Refugees and Internally Displaced Persons);two positively associated were P1(State Legitimacy)and X1(External Intervention).With regard to association with case fatality rates,C1(Security Apparatus)was positive,and P3(Human Rights and Rule of Law)and X1 was negative.Conclusion:With FSI measures by the Fund of Peace,overall,more fragile countries are less likely to be affected by the COVID-19 pandemic,and even if affected,death rates were lower.However,poor in state legitimacy and lack of external intervention are risk for COVID-19 infection and lack of security apparatus is risky for COVID-19 death.Implications of the study findings are discussed and additional studies are needed to examine the mechanisms underpinning these relationships. | Yuqi Duan Junxiong Ma Yangmu Huang Xinguang Chen Zhi-Jie Zheng | 2021 | Global Health Journal2021，5，1： | 0 |
| 9 | Designing Advanced Liquid Electrolytes for Alkali Metal Batteries:Principles,Progress,and Perspectives显示文摘The ever-growing pursuit of high energy density batteries has triggered extensive efforts toward developing alkali metal(Li,Na,and K)battery(AMB)technologies owing to high theoretical capacities and low redox potentials of metallic anodes.Typically,for new battery systems,the electrolyte design is critical for realizing the battery electrochemistry of AMBs.Conventional electrolytes in alkali ion batteries are generally unsuitable for sustaining the stability owing to the hyper-reactivity and dendritic growth of alkali metals.In this review,we begin with the fundamentals of AMB electrolytes.Recent advancements in concentrated and fluorinated electrolytes,as well as functional electrolyte additives for boosting the stability of Li metal batteries,are summarized and discussed with a special focus on structure-composition-performance relationships.We then delve into the electrolyte formulations for Na-and K metal batteries,including those in which Na/K do not adhere to the Li-inherited paradigms.Finally,the challenges and the future research needs in advanced electrolytes for AMB are highlighted.This comprehensive review sheds light on the principles for the rational design of promising electrolytes and offers new inspirations for developing stable AMBs with high performance. | Wanming Teng Junxiong Wu Qinghua Liang Jiaojiao Deng Yu Xu Qiong Liu Biao Wang Ting Ma Ding Nan Jun Liu Baohua Li Qingsong Weng Xiaoliang Yu | 2023 | Energy & Environmental Materials2023，6，2： | 0 |
| 10 | Microwave absorption properties of Ni/C@SiC composites prepared by precursor impregnation and pyrolysis processes显示文摘In the present study,the unique three-dimensional graphene coated nickel(Ni/C)foam reinforced silicon carbide(Ni/C@SiC)composites were first obtained via the precursor impregnation and pyrolysis(PIP)processes.The microstructure images indicated that the SiC fillers were successfully prepared in the skeleton pores of the Ni/C foam.The influence of the PIP cycles on the microwave absorption performances was researched,and the results indicated that after the primary PIP process,Ni/C@SiC-I possessed the optimal microwave absorbing performance with a minimum reflection loss(RL)of-25.87 d B at 5.28 GHz and 5.00 mm.Besides,the RL values could be below-10.00 dB from 5.88 GHz to 7.74 GHz when the corresponding matching thickness was 3.85 mm.However,the microwave absorption properties of Ni/C@SiC-II and Ni/C@SiC-Ⅲwere tremendously degraded as the PIP times increased.At last,the electromagnetic parameter,dielectric loss,attenuation constant as well as impedance matching coefficient were further investigated to analyze the absorbing mechanism,which opened a new path for the certain scientific evaluation of the absorbing materials and had extremely important to the defence technology. | Xinli Ye Junxiong Zhang Zhaofeng Chen Junfeng Xiang Yun Jiang Faqin Xie Xiaomin Ma | 2023 | Defence Technology(防务技术)2023，21，3： | 0 |
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