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8篇 您的检索式:作者名="Mengna Han"
    题名 作者 年代 出处 被引量
1Review of energy consumption research for papermaking industry based on life cycle analysis显示文摘Papermaking industry is a high-energy-consuming industry with long supply chain.The growth of paper product demand further intensifies the need of energy consumption.Energy saving through the full supply chain has become a focal point for long-term sustainable development of the papermaking industry.This paper reviews the advances in life cycle analysis for the papermaking industry in recent years.All the stages from the full supply chain are involved to give a panoramic overview of the papermaking industry.The object of this paper is to provide scientific basis to industry and decision-makers with profound understanding of the energy consumption and energy saving potential in a life cycle perspective.Yi Man Yulin Han Jigeng Li Mengna Hong 2019Chinese Journal of Chemical Engineering2019,27,7:6
2Real-time grain breakage sensing for rice combine harvesters using machine vision technology显示文摘Breakage rate is one of the most important indicators to evaluate the harvesting performance of a combine harvester.It is affected by operating parameters of a combine such as feeding rate,the peripheral speed of the threshing cylinder and concave clearance,and shows complex non-linear law.Real-time acquisition of the breakage rate is an effective way to find the correlation of them.In addition,real-time monitoring of the breakage rate can help the driver optimize and adjust the operating parameters of a combine harvester to avoid the breakage rate exceeding the standard.In this study,a real-time monitoring method for the grain breakage rate of the rice combine harvester based on machine vision was proposed.The structure of the sampling device was designed to obtain rice kernel images of high quality in the harvesting process.According to the working characteristics of the combine,the illumination and installation of the light source were optimized,and the lateral lighting system was constructed.A two-step method of“color training-verification”was applied to identify the whole and broken kernels.In the first step,the local threshold algorithm was used to get the edge of kernel particles in a few training images with binary transformation,extract the color spectrum of each particle in color-space HSL and output the recognition model file.The second step was to verify the recognition accuracy and the breakage rate monitoring accuracy through grabbing and processing images in the laboratory.The experiments of about 2300 particles showed that the recognition accuracy of 96%was attained,and the monitoring values of breakage rate and the true artificial monitoring values had good trend consistency.The monitoring device of grain breakage rate based on machine vision can provide technical supports for the intellectualization of combine harvester.Jin Chen Yi Lian Rong Zou Shuai Zhang Xiaobo Ning Mengna Han 2020International Journal of Agricultural and Biological Engineering2020,13,3:3
3Frequency steering of spaceborne clocks based on XPNAV-1 observations显示文摘Due to high stable rotations, timing of pulsars provides a natural tool to correct the frequency deviation of spaceborne atomic clocks. Based on processing the observational data about a year of Crab pulsar given by XPNAV-1 satellite, we study the possibility of correcting the frequency deviation of spaceborne atomic clocks using pulsar timing. According to the observational data in X-ray band and the timing model parameters from radio observations, the pre-fit timing residuals with a level of 67.66 μs are obtained. By fitting the slope of the timing residuals affected by the faked frequency-biased reference clock, we estimated successfully the relative frequency deviation of the reference clock. For a satellite clock with frequency deviation of the order about 10^(-12), a calibration accuracy with relative error of about 2% can be obtained from the Crab pulsar’s data for one year.The stability of the time scale based on Crab pulsar is about 10^(-12) for an interval of one year.Mengna HAN Minglei TONG Liansheng LI Yongqiang SHI Tinggao YANG Yuping GAO 2023Chinese Journal of Aeronautics2023,36,6:3
4A novel gatifloxacin-loaded intraocular lens for prophylaxis of postoperative endophthalmitis显示文摘Postoperative endophthalmitis(POE)has been the most threatening complication after cataract surgery,which perhaps can be solved by the antibiotic-loaded intraocular lens(IOL).However,most drug-loaded IOLs demonstrate insufficient drug quantity,short release time,increased implantation-related difficulties or other noticeable drawbacks.To prevent POE and to address these deficiencies,a drug-loaded copolymer IOL,prepared from poly(urethane acrylate)prepolymer,isobornyl methacrylate(IBOMA),N-vinyl-2-pyrrolidone(NVP),Irgacure 819,RUVA-93,and gatifloxacin(GAT),was rapidly fabricated via photocuring and by using a 3D-printed mold.This composite displayed an outstanding and controllable GAT release behavior in vitro,a high light transmittance,and a moderate refractive index.Also,it demonstrated improved strain stress and elongation compared with the reference commercial acrylic IOL material.In vivo tests demonstrated satisfying released drug concentration at the early treatment stage.In vitro and in vivo studies further confirmed the remarkable bacterial inhibition and prevention of POE by the proposed IOL,which also displayed good biocompatibility.These findings suggested that the GAT-loaded IOL could be a promising implant to prevent and cure POE,also the proposed methods could inspire more designs for various medical applications.Mengna Li Jing-Wei Xu Jiayong Li Wei Wang Chenqi Luo Haijie Han Zhi-Kang Xu Ke Yao 2023Bioactive Materials2023,,2:2
5Unveiling the Effects of Interchain Hydrogen Bonds on Solution Gelation and Mechanical Properties of Diarylfluorene-Based Semiconductor Polymers显示文摘The intrinsically rigid and limited strain of most conjugated polymers has encouraged us to optimize the extensible properties of conjugated polymers.Herein,learning from the hydrogen bonds in glucose,which were facilitated to the toughness enhancement of cellulose,we introduced interchain hydrogen bonds to polydiarylfluorene by amide-containing side chains.Through tuning the copolymerization ratio,we systematically investigated their influence on the hierarchical condensed structures,rheology behavior,tensile performances,and optoelectronic properties of conjugated polymers.Compared to the reference copolymers with a low ratio of amide units,copolymers with 30%and 40%amide units present a feature of the shearthinning process that resembled the non-Newtonian fluid,which was enabled by the interchain dynamic hydrogen bonds.Besides,we developed a practical and universal method for measuring the intrinsic mechanical properties of conjugated polymers.We demonstrated the significant impact of hydrogen bonds in solution gelation,material crystallization,and thin film stretchability.Impressively,the breaking elongation for P4 was even up to~30%,which confirmed the partially enhanced film ductility and toughness due to the increased amide groups.Furthermore,polymer light-emitting devices(PLEDs)based on these copolymers presented comparable performances and stable electroluminescence(EL).Thin films of these copolymers also exhibited random laser emission with the threshold as low as 0.52μJ/cm^(2),suggesting the wide prospective application in the field of flexible optoelectronic devices.Lubing Bai Yamin Han Chen Sun Xiang An Chuanxin Wei Wei Liu Man Xu Lili Sun Ning Sun Mengna Yu He Zhang Qi Wei Chunxiang Xu Yingguo Yang Tianshi Qin Linghai Xie Jinyi Lin Wei Huang 2020Research2020,,1:2
6SynBioEcoli: a comprehensive metabolism network of engineered E. coil in three dimensional visualization显示文摘设计 E 的一个全面新陈代谢网络。coli 在系统生物学是很重要的, metabolomics 学习。许多工具集中于二维的空格在新陈代谢的网络显示小径。然而,三维的可视化的用法可以帮助更好理解新陈代谢、规章的网络的复杂拓扑学。方法我们手工地从文学的大量试验性的数据(包括的小径,反应和代谢物) 与设计 E 的不同类型联系了的 curated。coli 然后利用了三维的可视化的一种新奇技术开发一个全面新陈代谢的网络命名 SynBioEcoli。结果 SynBioEoli 包含 740 条 biosynthetic 小径, 3,889 新陈代谢的反应, 2,255 化学药品手工地从与设计 E 的不同类型联系的大约 11,000 份新陈代谢出版物加重 curated。coli。而且, SynBioEcoli 与各种各样的信息科学技术集成。结论 SynBioEcoli 能被认为是设计 E 的全面 knowledgebase。coli 并且代表下一代细胞的新陈代谢网络可视化技术。它能经由浏览器被存取(例如 Google 铬) 支持 WebGL,在 http://gffzz849681930f04473ch9x66qc0wobxx6opu.ffgz.tsg.suse.edu.cn/synbioecoli/ 。Weizhong Tu Shaozhen Ding Ling Wu Zhe Deng Hui Zhu Xiaotong Xu Chen Lin Chaonan Ye Minlu Han Mengna Zhao Juan Liu Zixin Deng Junni Chen Dong-Qing Wei Qian-Nan Hu 2017Frontiers of Electrical and Electronic Engineering in China2017,5,1:2
7Alkyl-chain branched effect on the aggregation and photophysical behavior of polydiarylfluorenes toward stable deep-blue electroluminescence and efficient amplified spontaneous emission显示文摘The control of the condensed superstructure of light-emitting conjugated polymers(LCPs)is a crucial factor to obtain high performance and stable organic optoelectronic devices.Side-chain engineering strategy is an effective platform to tune inter chain aggregation and photophysical behaviour of LCPs.Herein,we systematically investigated the alkyl-chain branched effecton the conformational transition and photophysical behaviour of polydiarylfluorenes toward efficient blue optoelectronic devices.The branched side chain will improve materials solubility to inhibit interchain aggregation in solution according to DLS and optical analysis,which is useful to obtain high quality film.Therefore,our branched PEODPF,POYDPF pristine film present high luminance efficiency of 36.1%and 39.6%,enhanced about 20%relative to that of PODPF.Compared to the liner-type sides'chain,these branched chains also suppress chain planarization and improve film morphological stability effectively.Interestingly,the branched polymer also had excellent stable amplified spontaneous emission(ASE)behaviour with low threshold(4.72μJ/cm2)and a center peak of 465 nm,even thermal annealing at 220℃in the air atmosphere.Therefore,side-chain branched strategy for LCPs is an effective means to control interchain aggregation,film morphology and photophysical property of LCPs.Lili Sun Ning Sun Lubing Bai Xiang An Bin Liu Chen Sun Lixiang Fan Chuanxin Wei Yamin Han Mengna Yu Jinyi Lin Dan Lu Ning Wang Linghai Xie Kang Shen Xinwen Zhang Yanan Xu Juan Cabanillas-Gonzalez Wei Huang 2019Chinese Chemical Letters2019,30,11:1
8Intrinsically Viscoelastic Supramolecular Conjugated Polymer toward Suppressing Coffee-Ring Effect显示文摘The rational molecular design of light-emitting conjugated polymers that inherently suppress the ubiquitous coffee-ring effect(CRE)is a great challenge and the critical bottleneck for printing displays.Herein,we describe a supramolecular route to construct an intrinsically viscoelastic rigid conjugated polymer(RCP)(PHDPF-Cz)toward avoiding the CRE without sacrificing optoelectronic properties.Theπ-πstacking interactions derived fromthe pendant carbazole(Cz)units enable PHDPF-Cz to self-assemble into criss-cross nanofibers and endow its solutionwith great viscosity.Consequently,a high-quality and continuous PHDPFCz film was obtained by impeding the transport of aggregates to the droplet edge due to outward capillary flow during evaporation,in sharp contrast to the random aggregate migration and rapid precipitation generated fromthe controlled poly[4-(6-(9H-diphenylaniline-9-yl)hexyloxy)-9,9-diphenylfluorene]-co-[5-(6-(9H-diphenylaniline-9-yl)hexyloxy)-9,9-diphenylfluorene]and poly(9,9-dioctylfluorene)solutions.Finally,an efficient random laser is also achieved based on these cross-linked films with ultrastable single-chain excitonic behavior,confirming the effectiveness of our design strategy.Yamin Han Lubing Bai Xiang An Man Xu Chuanxin Wei Zongqiong Lin Mengna Yu Jinyi Lin Lili Sun Ning Sun Changting Wei Linghai Xie Xuehua Ding Qi Wei Chengrong Yin Chenghui Li Wenming Su Wei Huang 2022CCS Chemistry2022,4,11:0
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