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Computer Modeling in Engineering & Sciences 2020年第3期122卷 805-830页

作者： Zaiguo Fu huanhuan gao Zhuoxiong Zeng Jiang Liu College of Energy and Mechanical Engineering Shanghai University of Electric PowerShanghai200090China.

In order to comprehensively evaluate the flow and heat transfer performance of a large-size annular combustion chamber of a heavy-duty gas turbine,we carried out numerical computation and analyses on the velocity,temperature and pressure fields in the chamber with double *** mathematical model of the coupling combustion,gas flow,and heat transfer process was *** influences of the inlet swirling strength,fuel-air ratio and temperature of the premixed gas on the multi-field characteristics and synergy were investigated on the basis of field synergy *** results showed that the central recirculation zone induced by the inlet swirling flow grows downstream in the combustion *** velocity and temperature in the outlet section of the chamber tend to be uniform due to the upstream improved *** outer swirl number of the premixed gas flow has a great influence on the comprehensive flow and heat transfer performance of the combustion *** synergy angles change towards benefiting the synergy between velocity and temperature fields with the increasing swirl numbers and inlet gas temperature while the velocity-pressure synergy becomes *** increasing fuel-air ratio of premixed gas leads to different trends of the velocity-temperature synergy and velocity-pressure *** comprehensive synergy representing the low-resistance heat transfer performance is evidently dominated mainly by the velocity-temperature synergy.

关键词： Annular combustor heat transfer multi-field synergy synergy angle swirling flow.

An ultra-wideband coding polarizer for beam control and RCS reduction

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Frontiers of physics 2023年第4期18卷 291-299页

作者： huanhuan gao Xiaojun Huang Xiongwei Ma Xiaoyan Li Linyan Guo Helin Yang College of Communication and Information Engineering Xi’an University of Science and TechnologyXi’an 710054China College of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710129China School of Geophysics and Information Technology China University of GeosciencesBeijing 100083China College of Physical Science and Technology Central China Normal UniversityWuhan 430079China

Pancharatnam–Berry(PB)phase metasurface,as a special class of gradient metasurfaces,has been paid much attention owing to the robust performance for phase control of circularly polarized ***,we present an element-based polarizer for the first step,which enables the incident electromagnetic waves into the cross-polarized waves with the relative bandwidth of 71%,and the polarization conversion ratio exceeds 90%at 6.9–14.5 *** an eight-elements coding polarizer based on the PB phase is presented for the applications on beam control and radar cross section *** simulated values indicate that the reduction of radar cross section is more than 10 dB at 6–16 *** work reveals the availability of manipulating the waves,beamforming in communication systems and electromagnetic stealth,and so on.

关键词： polarizer Pancharatnam-Berry phase coding metasurface beam control RCS reduction

An efficient and recyclable iron(III)-containing imidazolium salt catalyst for cross-coupling of aryl Grignard reagents with alkyl halides

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Chinese Science Bulletin 2012年第16期57卷 1953-1958页

作者： YAN ChunHui WANG LinLin gao huanhuan SUN HongMei SHEN Qi The Key Laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, [DIPrim]Cl, was used to produce a novel iron(III)-containing imidazolium salt [DIPrim][FeCl 4 ], which included a N,N-diarylimidazolium cation (R = 2,6-diisopropylphenyl), [DIPrim] + , and tetrachloroferrate(III) anion, [FeCl 4 ]. This compound was an effective and easy-to-use catalyst for the cross-coupling of aryl Grignard reagents with primary and secondary alkyl halides bearing -hydrogens. After simply decanting the cross-coupling product in the ether layer, [DIPrim][FeCl 4 ] could be reused in at least four successive runs without significant loss of catalytic activity.

关键词：格氏试剂咪唑盐催化剂交叉偶联可回收卤代烷铁交叉耦合

Enhancing efficiency and stability of organic solar cells through a simplified four-step synthesis of fully non-fused ring electron acceptor

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Journal of Energy Chemistry 2024年第6期93卷 601-608,I0015页

作者： Chenyang Han huanhuan gao Yanna Sun Yuanyuan Kan Zhaozhao Bi Wei Ma Yani Zhang Juan Antonio Zapien Yingguo Yang Ke gao College of New Energy Xi’an Shiyou UniversityXi’an 710065ShaanxiChina Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Institute of Frontier ChemistrySchool of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237ShandongChina State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 99907China School of Microelectronics Fudan UniversityShanghai 200433China

Design and synthesis of superior cost-effective non-fullerene acceptors(NFAs)are still big challenges for facilitating the commercialization of organic solar cells(OSCs),yet to be ***,two medium bandgap fully non-fused ring electron acceptors(NFREAs,medium bandgap,i,e.,1,3-1,8 eV),namely PTR-2Cl and PTR-4Cl are synthesized with only four steps by using intramolecular noncovalent interaction central core,structured alkyl side chain orientation linking units and flanking with different electron-withdrawing end *** them,PTR-4C1 exhibits increased average electrostatic potential(ESP)difference with polymer donor,enhanced crystallinity and compactπ-πstacking compared with the control molecule *** a result,the PTR-4Cl-based OSC achieved an impressive power conversion efficiency(PCE)of 14.72%,with a much higher open-circuit voltage(V_(OC))of 0.953 V and significantly improved fill factor(FF)of 0.758,demonstrating one of the best acceptor material in the top-performing fully NFREA-based OSCs with both high PCE and V_(OC).Notably,PTR-4Cl-based cells maintain a good T_80lifetime of its initial PCE after over 936 h under a continuous thermal annealing treatment and over1300 h T_(80)lifetime without *** work provides a cost-effective design strategy for NFREAs on obtaining high V_(OC),efficient exciton dissociation,and ordered molecular packing and thus high-efficiency and stable OSCs.

关键词： Organic solar cells Fully non-fused ring acceptors End group engineering Morphology regulation High efficiency

Optimal root system strategies for desert phreatophytic seedlings in the search for groundwater

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Journal of Arid Land 2015年第4期7卷 462-474页

作者： LI Changjun ZENG Fanjiang ZHANG Bo LIU Bo GUO Zichun gao huanhuan TIYIP Tashpolat State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences College of Resources and Environment Science Xinjiang University Cele National Station of Observation and Research for Desert Grassland Ecosystem Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences Key Laboratory of Biogeography and Bioresource in Arid Land Xinjiang Institute of Ecology and GeographyChinese Academy ofSciences University of Chinese Academy of Sciences

Desert phreatophytes are greatly dependent on groundwater, but how their root systems adapt to different groundwater depths is poorly understood. In the present study, shoot and root growths of Alhagi sparsifolia Shap. seedlings were studied across a gradient of groundwater depths. Leaves, stems and roots of different orders were measured after 120 days of different groundwater treatments. Results indicated that the depth of soil wetting front and the vertical distribution of soil water contents were highly controlled by groundwater depths. The shoot growth and biomass of A. sparsifolia decreased, but the root growth and rooting depth increased under deeper groundwater conditions. The higher ratios of root biomass, root/shoot and root length/leaf area under deeper groundwater conditions implied that seedlings of A. sparsifolia economized carbon cost on their shoot growths. The roots of A. sparsifolia distributed evenly around the soil wetting fronts under deeper groundwater conditions. Root diameters and root lengths of all orders were correlated with soil water availabilities both within and among treatments. Seedlings of A. sparsifolia produced finer first- and second-order roots but larger third- and fourth-order roots in dry soils. The results demonstrated that the root systems of desert phreatophytes can be optimized to acquire groundwater resources and maximize seedling growth by balancing the costs of carbon gain.

关键词： desert phreatophytes root system strategy groundwater depth soil water biomass partition

Side chain engineering investigation of non-fullerene acceptors for photovoltaic device with efficiency over 15%

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Science China Chemistry 2020年第12期63卷 1799-1806页

作者： Xin Zhang Yunqian Ding Huanran Feng huanhuan gao Xin Ke Hongtao Zhang Chenxi Li Xiangjian Wan Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center(RECAST) Nankai UniversityTianjin 300071China

Side chain engineering plays a substantial role for high-performance organic solar cells (OSCs).Herein,a series of non-fullerene acceptor (NFA) molecules with A-D-A structures,TTCn-4F,with gradient substituent lengths of terminal side chains (T-SCs) on the molecular backbones have been designed and *** effects of T-SCs length,ranging from hydrogen atom to n-dodecyl,their optoelectronic properties,thin film molecular packing,blend film morphology,and overall photovoltaic performance have been systematically *** results show that among this series of molecules,TTC8-4F with n-octyl substituent,showed the best photovoltaic performance when applied with PM6 as the donor due to its favorable morphology,balanced charge mobility,effective exciton dissociation and less charge *** on this,its ternary device with F-Br as the secondary acceptor achieved a high PCE of 15.34%with the simultaneously enhanced Voc of 0.938 V,Jscof 22.66 mA cm^-2,and FF of 72.15%.These results indicate that the engineering of T-SCs is an effective strategy for designing high-performance NFAs.

关键词： organic solar cells non-fullerene acceptor side chains

Synthesis, structure of iron(Ⅲ)-containing imidazolium salts and their catalytic activity in the alkylation of aryl Grignard reagents

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Chinese Science Bulletin 2013年第4期58卷 493-499页

作者： XIA Ying YAN ChunHui LI Zhuang gao huanhuan SUN HongMei SHEN Qi ZHANG Yong The Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University

A series of iron(III)-containing imidazolium salts of the general formula [DRim][FeX 4 ] (R=2,6-diisopropylphenyl, IPr, X=Cl, 1; R=IPr, X=Br, 2; R=tertbutyl, t Bu, X=Cl, 3; R=isopropyl, i Pr, X=Cl, 4; R=benzyl, Bn, X=Cl, 5; R=Bn, X=Br, 6) have been prepared in high yields via reactions of anhydrous ferric halides with equivalent of the corresponding N,N-dihydro- carby-limidazolium halides, where 2-6 are novel ones. All of the complexes were characterized by elemental analysis, Raman spectroscopy, electrospray ionization mass spectroscopy, and X-ray crystallography for 1 and 2. All of them were non-hygroscopic and air-stable, with four of them existing as solids (1-4) and two as liquids (5 and 6) at room temperature. A preliminary catalytic study on the coupling of 4-tolylmagnesium bromide with cyclohexyl bromide revealed that 1 and 3 possessed the highest activity. In comparison, 2, 4 and 5 exhibited moderate activity and the least active complex was 6.

关键词： Grignard试剂催化活性鎓盐咪唑结构式烷基化合成铁

Bio-modulation of scaring Glaucoma Filtration Surgery using a novel application of coated magnesium

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Journal of Magnesium and Alloys 2021年第3期9卷 883-894页

作者： Xiangji Li Richard Filek Xiaomin Zhu huanhuan gao Liying Qiao Hong Liu Lin Xie Yong Wang Fusheng Pan Cindy ML Hutnik Department of Ophthalmology Institute of Surgery ResearchDaping HospitalArmy Medical UniversityChongqing 400042China Department of Ophthalmology Western UniversityIvey Eye InstituteSt.Joseph's Health Care LondonLondonONCanada Department of Ophthalmology The Third Affiliated HospitalChongqing Medical UniversityChongqing 400016China Collage of Material Science&Engineering Chongqing UniversityChongqing 400045China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400045China

Filtration surgery still plays a mainstream role of treatment for *** scarring is the main cause of surgical *** study evaluated the biocompatibility and anti-proliferative properties of pure magnesium with three different coatings,which are hydroxyapatite(HA),dicalcium phosphate dihydrate(DCPD)and DCPD+stearic acid(SA),in a primary culture of human tenon's capsule fibroblasts(HTCFs)and in rabbit Glaucoma Filtration *** and glass were used as controls in vitro,and trabeculectomy was used as control in *** results show the number and shape of HTCFs seeded on different coatings showed less quantity and poor cell *** type of coated magnesium demonstrated significantly decreased metabolic activity of ***+SA showed higher cytotoxicity than the other *** inhibition of proliferation was observed with the DCPD+SA *** expression ofα-SMA was decreased in the cells when seeded on all of the coated magnesium *** vivo,no obvious adverse effects were observed after *** significant difference existed for any of the different samples regarding different ion concentrations in the aqueous *** inflammatory response in the titanium,DCPD and DCPD+SA treated eyes was more intense than in the trabeculectomy alone and HA *** Blot analysis showed that collagen-1 andα-SMA expression was significantly lower in the titanium,HA,DCPD and DCPD+SA groups compared with the *** coatings on magnesium were able to affect the corrosive properties,which in turn,influenced the morphology and function of *** coated magnesium may be considered a very promising biodegradable material for the next generation of glaucoma drainage devices.

关键词： Glaucoma Glaucoma drainage device Fibrosis Tenon's capsule fibroblasts Magnesium Coating

Production performance analysis of a continental shale oil reservoir in Bohai Bay basin

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Petroleum 2024年第2期10卷 294-305页

作者： Quansheng Guan Changwei Chen Xiugang Pu Yonggang Wan Jing Xu Haiwei Zeng Chen Jia huanhuan gao Wei Yang Zesen Peng China University of Petroleum BeijingChina Exploration&Development Research Institute of Dagang Oilfield CNPCTianjinChina Unconventional Petroleum Research Institute China University of PetroleumBeijing

Due to the extremely low permeability of shale formations,the combination of horizontal well and volume fracturing has been proposed as an effective technique to improve the production of Dagang continental shale oil *** on the flow material balance method(FMB)and straight-line analysis(SLA)method,the stimulated reservoir volume(SRV)and drainage volume are determined to identify the flow regimes of the seepage mechanism of shale oil *** resolve the challenges of multi-scaled flow regimes and bottom hole pressure(BHP)variation before and after pumping in shale oil wells,a multi-linear analytical flow model was established to predict the future production and the final expected ultimate recoverable oil(EURo)after fitting the historical production *** on the results,it can be concluded that the flow regime of a shale oil well in production can be divided into two stages consisting of linear flow within SRV and composite flow from the un-stimulated area to *** effects of fracturing operation parameters,such as fracturing fluid volume and sand/liquid ratio,on shale oil productivity,are analyzed,and insightful suggestions are drawn for the future development of this pay zone.

关键词： Shale oil reservoirs Rate transient analysis Flow material balance Analytical multi-linear model Production performance

Sebaceous gland reprogramming with a single gene, PPARG, and small molecules

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Signal Transduction and Targeted Therapy 2023年第9期8卷 3913-3916页

作者： Yiqiong Liu Shuaifei Ji huanhuan gao Huating Chen Jiangbing Xiang Shaoyuan Cui Christos CZouboulis Aizhen Cai Xiaobing Fu Xiaoyan Sun Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical Center PLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepairand RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051100048 BeijingP.R.China Department of Nephrology The First Medical CenterChinese PLA General HospitalState Key Laboratory of Kidney Diseases100048 BeijingChina Departments of Dermatology VenereologyAllergologyand ImmunologyStaedtisches Klinikum DessauBrandenburg Medical School Theodor Fontane and Faculty of Health Sciences BrandenburgDessauGermany Institute of General Surgery Department of General Surgerythe 1st Medical CenterPLA General Hospital28 Fu Xing Road100853 BeijingP.R.China

Dear Editor,Sebaceous glands(SG)contribute to 90%of the skin surface lipid production and play critical roles in regulating proper skin functions including epidermal barrier maintenance,dermal immune responses,and global body anti-microbial activities.1 Reduced sebaceous lipid has been implicated in diverse skin diseases,including scarring alopecia,inflammation,chronic itch,as well as premature aging of the skin.2 Especially,scar repair after deep burns or large-scale skin defect often leads to irreversible loss of *** to lacking SG,the regenerated tissues cannot fully recapitulate the structural and functional integrity of normal ***,generation of expandable SG cells with developmental and lipid-producing potentials represents a promising approach for treating diseased,damaged,or aged skin with better quality of ***,direct cellular reprogramming has been widely used for obtaining difficult-to-maintain human cells by cell type-specific transcription factors(TFs).

关键词： programming maintain irreversible