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Molecular coordination-doping engineering enables adjustable ion transport channel based on MOFs-derived UIOliTF-LLZTO ionic conductor

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Journal of Materials Science & Technology 2023年第32期163卷 113-120页

作者： Shuyu yao Chenyong li Bing Jia Haoran Xu Shihua Dong Jian tian School of Materials Science and Engineering College of Energy Storage TechnologyShandong University of Science and TechnologyQingdao266590China Qingdao Haiwan Technology Industry Research Institute Co. Ltd.Qingdao Haiwan Group Co.Ltd.Qingdao266061China Rongcheng Hui De Environmental Protection Technology Co. Ltd.Weihai264300China

The inferior ionic conductivity of composite polymer electrolytes(CPEs)caused by grain boundary impedance is one of the critical *** ion transport channels at the molecular level can improve ionic conductivity and lithium-ion transference ***,UIO-66-NSO_(2)CF_(3)lili_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(UIOliTF-LLZTO)ionic conductor derived from metal-organic frameworks(MOFs)was designed by a covalent grafted strategy of trifluoromethylsulfonyl(TF)group on UIOliTF and a doping process of LLZTO,showing two new lithium-ion transfer channels driven by molecular coordinationdoping *** first channel along UIOliTF-UIOliTF was constructed due to the existence of the TF group on *** second channel along UIOliTF-LLZTO was constructed due to the direct nanometer contact interface between the opened channel of UIOliTF and *** TF group acts as“claws”to capture and transfer lithium-ion along the different channels,facilitating improving ionic conductivity and reducing grain boundary *** from the molecular coordination-doping engineering,UIOliTF-LLZTO exhibits high ionic conductivity of 9.86×10^(-4)S cm^(-1),a large lithium-ion transference number of 0.79,and a wide electrochemical window of 5.35 ***,all-solid-state li|UIOliTF-LLZTO|liFePO4 batteries show a high specific capacity of 164.5 mAh g^(-1)and 155.6 mAh g^(-1)at 0.2 C and 0.5 C,***,UIOliTF-LLZTO demonstrates the way towards the development of MOFs-based CPEs for all-solid-state lithium batteries with high performance.

关键词： Metal-organic frameworks LLZTO Ionic conductor lithium-ion transport channel Solid-state battery

Response of InSight resonance modes to environmental factors on Mars

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Earth and Planetary Physics 2024年第4期8卷 579-588页

作者： liFei tian HuaJian yao Laboratory of Seismology and Physics of Earth’s Interior School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences Center for Excellence in Comparative Planetology University of Science and Technology of ChinaHefei 230026China Mengcheng National Geophysical Observatory University of Science and Technology of ChinaMengcheng 230026China

The InSight(Interior Exploration using Seismic Investigations,Geodesy,and Heat Transport)mission has recorded continuous ambient noise signals with many spectral peaks since its landing in *** majority of these peaks are modes produced by instrumental vibrations and are associated with environmental factors,such as temperature and wind energy *** how these modes react under various conditions is crucial because it aids in identifying their *** this study,we analyzed the three-component spectra of InSight recordings from sols 184–738 and obtained the horizontal-to-vertical spectral ratio(HVSR,also known as H/V)curves for different time *** primary modes,such as those at 3.3 and 4.1 Hz,exhibited different behaviors,suggesting diverse *** modes were sensitive to low temperature and some were sensitive to high ***,we investigated the influence of wind and temperature on the H/V *** peak frequency was mainly affected by temperature,whereas the H/V value was not associated with the temperature or wind *** these modes and elucidating their origins are significant for processing signals from InSight and can provide valuable guidance for designing future planetary seismometers.

关键词： Mars InSight spectral peaks H/V curve

Accelerated discovery of boron-dipyrromethene sensitizer for solar cells by integrating data mining and first principle

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Journal of Materiomics 2021年第4期7卷 790-801页

作者： tian Lu Minjie li Zhenpeng yao Wencong Lu Materials Genome Institute Shanghai UniversityShanghai200444China Department of Chemistry College of ScienceShanghai UniversityShanghai200444China Department of Chemistry University of TorontoTorontoOntarioM5S 3H6Canada

Boron-dipyrromethene(BODIPY)is one promising class of sensitizers for dye-sensitized solar cells(DSSCs)due to unique merits of high absorption coefficient and versatile structural modification ***,such derivatives usually suffer from limited power conversion efficiencies(PCEs)because of narrow light absorption band and low electron *** aid the discovery of BODIPY sensitizers,we employ an inverse design method to design efficient sensitizers by integrating data mining and firstprinciple *** establish robust data-mining models using genetic algorithm and multiple linear regression,where the features are filtered from 5515 descriptors and their meanings are explicitly explored for next inverse *** on the features’understanding,we design candidates NH1-6 and predict their PCEs,demonstrating remarkable enhancements(58%maximum)compared to previous ***,their optoelectronic properties including maximum absorption wavelengths,oscillator strengths,bandgaps,transferred charges,charge transferred distances,TiO_(2) conduction band shifts,short-circuit currents and electron injection efficiencies simulated via first-principle calculations indicate significant increasements(93 nm,122.41%,23.70%,36.36%,471.17%,63.64%,28.55%,107.86%maximum),which testifies the corresponding highly predicted PCEs and may overcome BODIPY dyes’*** as-designed BODIPY sensitizers can be promising candidates for DSSCs,and such method could help accelerate the discovery of other energy materials.

关键词： Boron-dipyrromethene sensitizers Quantitative structure-property relationships Optoelectronic properties Electron injection dynamics Dye-sensitized solar cells

Aerodynamic Design of a Subsonic Evacuated Tube Train System

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Fluid Dynamics & Materials Processing 2020年第1期16卷 121-130页

作者： tian li Xiaohan Zhang yao Jiang Weihua Zhang State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu610031China China Railway Eryuan Engineering Group Co. Ltd.Chengdu610031China

The so-called Evacuated Tube Train(ETT)is currently being proposed as a high-speed transportation system potentially competitive with airplane *** resistance is one of the most crucial factors for the successful design of an *** the present work,a three-dimensional concept ETT model has been *** aerodynamic characteristics of the subsonic ETT have been numerically simulated under different *** train’s running speed varies from 600 km/h up to 1200 km/h,and the blockage ratio is in the range between 0.1 and *** the blocking ratio and running speed increase,the resistance of the head car increases greatly,while the resistance of the middle car changes *** aerodynamic resistance of the tail car is affected by the shock wave emerging in the wake *** different design criteria for the maximum allowed aerodynamic resistance are proposed for aerodynamic parameter *** an increase in the blockage ratio and running speed,the atmospheric pressure in the tube should be decreased to achieve a balance.

关键词： Evacuated tube train aerodynamic resistance blockage ratio shock wave

Seasonal transition characteristics of the westerly jet: Study based on field observations at an altitude of 6900 m on the Mt. Xixiabangma Dasuopu glacier

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Chinese Science Bulletin 2011年第18期56卷 1912-1920页

作者： li ShengHai yao TanDong tian liDe WANG Pengling Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China State Key Laboratory of Cryosphere Sciences Lanzhou 730000 China Graduate University of Chinese Academy of Sciences Beijing 100049 China National Climate Center China Meteorological Administration Beijing 100081 China

To better understand ultra-high-altitude climate characteristics and their changes, an automatic weather station was installed on August 4, 2005 on the Mt. Xixiabangma Dasuopu glacier (28°23.04′N, 85°43.72′E, 6900 m a.s.l.) in the middle of the Himalayas. Mountain weather conditions were observed continuously and automatically. This paper is the first to publish meteorological data for a whole year for a high-elevation region, and analyze wind direction, wind speed, air temperature, air pressure and humidity. Analysis of the observation data reveals that this region was strongly influenced by the westerly jet from October 10, 2005 to April 21, 2006 and by the Indian monsoon from May to September. The seasonal transitions of the westerly jet were characterized by changes in meteorological elements. In winter, influenced by the westerly jet, the wind speed in the study region was very high and fluctuated violently, gale days were frequent, temperature and air pressure fluctuated dramatically, the diurnal range of temperature decreased and the diurnal range of air pressure increased, relative humidity and specific humidity declined sharply, and air was dry. In summer, influenced by the Indian monsoon, the relative humidity and specific humidity were high. In addition, we analyzed reanalysis data for the location of the automatic weather station. The results confirmed that this region was strongly affected by the westerly jet from October 10, 2005 to April 21, 2006 and the observations that the seasonal transitions of the westerly jet were characterized by changes in meteorological elements.

关键词：高海拔地区西风急流达索普冰川希夏邦马峰季节转换基础研究相对湿度自动气象站

A photoacoustic imaging system with variable gain at different depths

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Journal of Innovative Optical Health Sciences 2018年第5期11卷 1-10页

作者： tian Guan yao li Muqun Yang Yong Jiang Yonghong He Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Graduate School at Shenzhen Tsinghua University Shenzhen 518055P.R.China Department of Biomedical Engineering Tsinghua University Beijing 100084P.R.China Center of Precision Medicine and Healthcare Tsinghua-Berkeley Shenzhen Institute Shenzhen 518055P.R.China Shenzhen Wisonic Medical Technology Co. Ltd.Taoyuan StreetNanshan DistrictShenzhen 518055P.R.China

We established a photoacoustic imaging(PAI)system that can provide variable gain at different *** PAI system consists of a pulsed laser with an optical parametric oscillator working at a 728 nmwavelength and an imaging-acquisition-and-processing unit with an ultrasound ***-controlled attenuator was used to realize variable gain at different depths when acquiring PAI *** proof-of-concept imaging results for variable gain at different depths were achieved using specic *** resolution and optical contrast obtained through the results of variable gain for a targeted depth range are better than those of constant gain for all *** further testify the function,we imaged the sagittal section of the body of in vivo nude *** addition,we imaged an absorption sample embedded in a chicken breast tissue,reaching a maximum imaging depth of4.6 *** results obtained using the proposed method showed better resolution and contrast than when using 50 dB gain for all *** depth range resolution was1 mm,and the maximum imaging depth of our system reached4.6 ***,blood vessels can be revealed and targeted depth range can be selected in nude mice imaging.

关键词： Photoacoustic imaging variable gain imaging depth

Mechanism of action of linggui Zhugan Decoction in treating non-alcoholic fatty liver disease using untargeted metabolomics approach

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Traditional Medicine Research 2025年第2期10卷 65-76页

作者： Huan Pei Ren-lin li Xin-Ran Song Qian-Qian Wan Yu-Ming Wang Han-Zhou li Wei-Quan Xu Jia-Bao liao Wei-Bo Wen Jing Miao Huan-tian Cui School of Basic Medicine Yunnan University of Chinese MedicineKunming 650599China School Clinical Medical College Yunnan University of Chinese MedicineKunming 650599China First School of Clinical Medicine Yunnan University of Chinese MedicineKunming 650599China School of Integrative Chinese and Western Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Department of Pharmacy Tianjin Second People's HospitalTianjin 300192China

Background:Non-alcoholic fatty liver disease(NAFLD)is a liver disorder characterized by the accumulation and degeneration of fat in the liver cells,a condition that may further deteriorate and lead to cirrhosis and liver *** studies showed that metabolic dysfunction can promote NAFLD *** Zhugan Decoction(LGZGD)has therapeutic effects on *** mechanism of LGZGD still remains *** study was to examine the impact of LGZGD on the metabolic processes involved in the development of ***:A mice model of NAFLD was treated with *** therapeutic potential of LGZGD was evaluated by assessing the activity of transaminases,lipids levels of blood,and pathological changes in the liver of the mice model of ***,this study also evaluated the influence of LGZGD on liver inflammation and oxidative ***:The results of untargeted metabolomics analysis showed that LGZGD reduced the disordered lipid metabolism in NAFLD *** improved the oxidative stress and also reduced the levels of pro-inflammatory cytokines in the *** metabolomics analysis of liver samples revealed that LGZGD treatment improved metabolic disorders,including alanine,aspartate,glutamate,glycerophospholipid metabolism,and citrate *** RT-qPCR and Western blot results showed that LGZGD could regulate the expression of key enzymes in the metabolic pathway of the citrate cycle,including ATP-citrate lyase(ACLY),alanine-glyoxylate aminotransferase-2(AGXT2),phosphatidylethanolamine N-methyltransferase(PEMT),and succinate dehydrogenase(SDH).Conclusion:We found that LGZGD can treat NAFLD by reducing inflammatory responses,inhibiting oxidative stress,regulating alanine,aspartate,glutamate,and glycerophospholipid metabolism,and citrate cycle pathways.

关键词： NAFLD LGZGD untargeted metabolomics glycerophospholipid metabolism citrate cycle

Synthesis, Characterization and Properties of Novel Star-Shaped π-Conjugated Oligomers with Triphenylamine Core

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Chinese Journal of Chemistry 2013年第4期31卷 456-464页

作者： Leijing liu Qing Guo Jiyang li Bin yao Wenjing tian State Key Laboratory of Supramolecular Structure and Materials Jilin University Changehun Jilin 130012 China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changehun Jilin 130012 China Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education Jilin University Changchun Jilin 130012 China

Four new star-shaped π-conjugated oligomers （TPA-CZ3, TPA-TPA3, TPA-PTZ3 and TPA-BT3） with triphenylamine as a core and different electron-donating ability groups, carbazole, triphenylamine, phenothiazine and bithiophene, as peripheral units have been designed and synthesized via the Heck reaction. These oligomers show good solubility in common organic solvents. Their photophysical, electrochemical, electronic structure and charge transfer properties between these star-shaped n-conjugated oligomers and N,N＇-bis（1-ethylpropyl）-3,4：9,10- perylene bis（tetracarboxyl diimide）（EP-PDI） have been investigated by UV-vis absorption spectra, photolumines- cence （PL） spectra, cyclic voltammetry （CV） measurement, theoretical calculations and fluorescence quenching. The results show that the absorptions and fluorescences of TPA-CZ3, TPA-TPA3 and TPA-PTZ3 are red shifted with the electron-donating ability of the peripheral unit increasing from carbazole to triphenylamine and phenothi- azine. In addition, although the bithiophene group has a weaker electron-donating ability than carbazole, triphenylamine and phenothiazine, the absorption and fluorescence of TPA-BT3 have a red shift than those of TPA-CZ3, TPA-TPA3 and TPA-PTZ3 because TPA-BT3 has a longer conjugation length than TPA-CZ3, TPA-TPA3 and TPA-PTZ3. The triphenylamine core and the peripheral units can constitute a large conjugated structure. The fluorescence quenching properties indicate that efficient charge transfer can happen between the star-shaped oligomers and EP-PDI.

关键词： triphenylamine star-shaped oligomer synthesis design electron-donor ability conjugation length

SDH-FCOS:An Efficient Neural Network for Defect Detection in Urban Underground Pipelines

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Computers, Materials & Continua 2024年第1期78卷 633-652页

作者： Bin Zhou Bo li Wenfei Lan Congwen tian Wei yao College of Computer Science South-Central Minzu UniversityWuhan430074China

Urban underground pipelines are an important infrastructure in cities,and timely investigation of problems in underground pipelines can help ensure the normal operation of *** to the growing demand for defect detection in urban underground pipelines,this study developed an improved defect detection method for urban underground pipelines based on fully convolutional one-stage object detector(FCOS),called spatial pyramid pooling-fast(SPPF)feature fusion and dual detection heads based on FCOS(SDH-FCOS)*** study improved the feature fusion component of the model network based on FCOS,introduced an SPPF network structure behind the last output feature layer of the backbone network,fused the local and global features,added a top-down path to accelerate the circulation of shallowinformation,and enriched the semantic information acquired by shallow *** ability of the model to detect objects with multiple morphologies was strengthened by introducing dual detection *** experimental results using an open dataset of underground pipes show that the proposed SDH-FCOS model can recognize underground pipe defects more accurately;the average accuracy was improved by 2.7% compared with the original FCOS model,reducing the leakage rate to a large extent and achieving real-time ***,our model achieved a good trade-off between accuracy and speed compared with other mainstream *** proved the effectiveness of the proposed model.

关键词： Urban underground pipelines defect detection SDH-FCOS feature fusion SPPF dual detection heads