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Soil Moisture Inversion Based on Dual-Frequency Signal of QZSS GEO Satellite

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Soil Moisture Inversion Based on Dual-Frequency Signal of QZ...

基于聚集诱导发光特性的荧光探针对汞离子的点亮型检测（英文）

第十四届中国卫星导航年会

作者： yahui kong Lili Jing Fan Gao Nazi Wang Tianhe Xu Xinyue Meng Yunqiao He Baojiao Ning School of space science and physics Shandong University Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment

In recent years, soil moisture retrievel using GNSS reflection signals has become a topic of great concern to scholars. However, most researchers adopt GPS and BDS signals to carry out the related research. There are insuffcient studies on soil moisture inversion using QZSS(Quasi-Zenith Satellite System), and the performance of soil moisture inversion with different QZSS signals has not been evaluated yet. This study aims to provide new results by conducting a soil moisture monitoring experiment of QZSSReflectometry(QZSS-R) using the QZSS GEO satellite signal in the experimental field of Weihai Academy of Agricultural Sciences, Shandong Province. The original Intermediate Frequency(IF) data were collected, and the experimental data on October 21, 2022(during bare soil period) were processed by using the self-developed GNSS-R software receiver. The results of different soil moisture inversion models were evaluated for L1 C/A and L5 signals, and it is found that the signal quality of L5 is better than that of L1 C/A in QZSS-R soil moisture inversion. For the Topp model, the RMSE(Root Mean Square Error) of L5 and L1 C/A inversion results are 0.0240 cm/cm and 0.1725cm/cm. For the Wang model, the RMSE of L5 and L1 C/A inversion results are 0.0317 cm/cm and 0.1856 cm/cm respectively. These results demonstrate that the soil moisture estimations accuracy of QZSS L5 signal are superior to that of L1 C/A.

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影像科学与光化学 2016年第6期34卷 513-525页

作者：潘小玲张亚会孔令伟石建兵佟斌董宇平北京理工大学材料科学与工程学院北京市结构可控先进功能材料与绿色应用重点实验室北京100081

首先通过二溴六苯基丁二烯(HPB-Br)与4-乙烯基吡啶的Heck反应,获得含有两个吡啶基团的六苯基丁二烯(HPB-Py),再用碘甲烷甲基化得到含有双甲基吡啶碘盐的目标产物:六苯基-1,3-丁二烯衍生物(HPB-PyM)。作为HPB-PyM的前体化合物,HPB-Br和HP... 详细信息

首先通过二溴六苯基丁二烯(HPB-Br)与4-乙烯基吡啶的Heck反应,获得含有两个吡啶基团的六苯基丁二烯(HPB-Py),再用碘甲烷甲基化得到含有双甲基吡啶碘盐的目标产物:六苯基-1,3-丁二烯衍生物(HPB-PyM)。作为HPB-PyM的前体化合物,HPB-Br和HPB-Py显示出优异的聚集诱导发光(AIE)特性。而HPB-PyM则呈现出聚集诱导猝灭(ACQ)特性,其固体呈橙红色荧光,发射波长λem=605nm。当有汞离子存在的条件下,HPB-PyM基于AIE机制被点亮,并对Hg^(2+)的检测具有响应速度快、灵敏度高和选择性强的特点,线性检测的最低限为4.153μmol/L,证明HPB-PyM是一种新型"点亮"汞离子探针。

关键词：六苯基-1,3-丁二烯衍生物高选择性检测汞离子 “点亮”荧光响应

Combining ectomycorrhizal fungi and plant growth-promoting rhizobacteria to enhance salt tolerance of Metasequoia glyptostroboides

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Journal of Forestry Research 2023年第5期34卷 1603-1614页

作者： Weiliang kong Xiuqian Xu Zhenqian Li yahui Wang Xiaoqin Wu Co-Innovation Centre for Sustainable Forestry in Southern China College of ForestryNanjing Forestry UniversityNanjing 210037People’s Republic of China Jiangsu Key Laboratory for Prevention and Management of Invasive Species Nanjing Forestry UniversityNanjing 210037People’s Republic of China

Plant growth and productivity are negatively affected by soil *** study investigated the effects of the rhizosphere-promoting bacterium,Bacillus paramycoides JYZ-SD5,and the ectomycorrhizal fungus,Schizophyllum commune Be,on the growth of Metasequoia glyptostroboides under salt *** in biomass,root growth,root ion distribution and in vivo enzyme activities were determined under different treatments(Be,JYZ-SD5,and Be+JYZ-SD5).The results show that all inoculations increased chlorophyll content,shoot length and root diameter with or without salt stress,and the effect of Be+JYZ-SD5was the ***-SD5 and Be+JYZ-SD5 treatments significantly increased root length,surface area,bifurcation number,tip number,main root length and diameter under salt *** chloroplast structures developed under both single and double *** to the control,root activities of *** in the Be,JYZSD5,and Be+JYZ-SD5 treatments increased by 31.3%,17.2%,and 33.7%.All treatments increased the activities of superoxide dismutase(SOD),peroxidase(POD),Na^(+)-K^(+)-ATPase and Ca^(2+)-Mg^(2+)-*** strongest effect was by Be+*** of root ion distribution showed that,under salt stress,Na^(+)and K^(+)decreased and were concentrated in the epidermis or ***/K ratios also *** Be+JYZ-SD5 treatment increased betaine by 130.3%and 97.9%under 50 mM and 100 mM salt stress,***,these changes result in the activation of physiological and biochemical processes involved in the mitigation of salinity-induced stress in ***.

关键词： Bacillus paramycoides Schizophyllum commune Metasequoia glyptostroboides Salt stress Plant growth

Experimental and numerical studies on buckling and post-buckling behavior of T-stiffened variable stiffness panels

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Chinese Journal of Aeronautics 2024年第10期37卷 459-470页

作者： Yan HUANG yahui ZHANG Bin kong Jiefei GU Zhe WANG Puhui CHEN State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China AVIC Aviation Power Control System Research Institute Wuxi 214063China Chengdu Aircraft Design and Research Institute Aviation Industry Corporation of ChinaChengdu 610091China School of Mechanical Engineering Jiangnan UniversityWuxi 214122China School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China China National Key Laboratory of Strength and Structural Integrity Aircraft Strength Research Institute of ChinaXi’an 710065China

Currently,experimental research on variable stiffness design mainly focuses on *** ensure adaptability in practical application,it is imperative to conduct a systematic study on stiffened variable stiffness structures,including design,manufacture,experiment,and *** on the minimum curvature radius and process schemes,two types of T-stiffened panels were designed and *** compression tests have been carried out and the results indicate that the buckling load of variable stiffness specimens is increased by 26.0%,while the failure load is decreased by 19.6%.The influence mechanism of variable stiffness design on the buckling and failure behavior of T-stiffened panels was explicated by numerical *** primary reason for the reduced strength is the significantly increased load bearing ratio of *** experimental investigations of stiffened variable stiffness structures are very rare,this study can be considered a reference for future work.

关键词： Variable stiffness composite Buckling Post-buckling Finite element method Stiffened panels

Aggregation-Induced Emission of Hexaphenyl-1,3-butadiene

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Chinese Journal of Chemistry 2015年第7期33卷 701-704页

作者： yahui Zhang Lingwei kong Jianbing Shi Bin Tong Junge Zhi Xiao Feng Yuping Dong School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China School of Chemistry Beijing Institute of Technology Beijing 100081 China

A new type of AlE molecules based on hexaphenyl-1,3-butadienes was reported with respect to the synthesis and characterization. This material exhibited different maximum emission wavelength and enhanced emission inten... 详细信息

关键词： aggregation-induced emission hexaphenyl-1,3-butadienes aggregate state phase transition

变刚度复合材料平板与开孔板屈曲性能试验验证与数值仿真

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复合材料学报 2023年第4期40卷 2377-2389页

作者：张雅会陈普会孔斌南京航空航天大学机械结构力学及控制国家重点实验室南京210016 中国航空工业集团公司成都飞机设计研究所成都610091

为验证基于丝束曲线铺放的变刚度设计在改善典型航空结构屈曲性能中的应用潜力,设计并制造了变刚度复合材料平板和开孔板试件。通过应变片和非接触式三维光学测量系统,全面地测量了试件受单轴压缩载荷过程中的面外位移和载荷方向应变。... 详细信息

为验证基于丝束曲线铺放的变刚度设计在改善典型航空结构屈曲性能中的应用潜力,设计并制造了变刚度复合材料平板和开孔板试件。通过应变片和非接触式三维光学测量系统,全面地测量了试件受单轴压缩载荷过程中的面外位移和载荷方向应变。试验结果表明:变刚度平板和开孔板较同构型直线铺层试件屈曲载荷分别提升53.4%和46.6%;试件力学响应相似,均为线性加载至屈曲载荷后刚度大幅折减,变刚度试件后屈曲阶段呈近似线性,而直线铺层试件则连续变化。根据试验方案细化了数值模型,屈曲载荷、面外位移及应变的计算结果与试验结果基本吻合。在此基础上,提取了数值模型中的刚度分布和加载截面载荷分布,阐明了变刚度设计的抗屈曲机制。对于本文试件,采用变刚度设计还可显著提高破坏载荷,并降低侧边载荷,缓解应力集中。

关键词：变刚度复合材料层压板开孔层压板屈曲数值仿真

Flexible,durable,and anti-fouling nanocellulose-based membrane functionalized by block copolymer with ultra-high flux and efficiency for oil-in-water emulsions separation

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Nano Research 2023年第4期16卷 5665-5675页

作者： Jianfei Wu Yuxuan Su Ziwei Cui Yang Yu Jiafu Qu Jundie Hu yahui Cai Jianzhang Li Dan Tian Qichun Zhang Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Department of Materials Science and Engineering&Center of Super-Diamond and Advanced Films(COSDAF) City University of Hong KongHong Kong 999077China

The clearwater obtained from stabilized oily wastewater has become a worldwide ***,the area of oil/water emulsion separation materials have accomplished great progress,but still faces the enormous problems of low flux,poor stability,and pollution ***(cellulose nanocrystals(CNC))with the advantages of hydrophilicity,ecofriendliness,and regeneration are ideal materials for the construction of separation *** this paper,a flexible,antifouling,and durable nanocellulose-based membrane functionalized by block copolymer(poly(N-isopropylacrylamide)-b-poly(N,Ndimethylaminoethyl methacrylate))is prepared via chemical modification and self-assembly,showing high separation efficiency(above 99.6%)for stabilized oil-in-water emulsions,excellent anti-fouling and cycling stability,high-temperature resistance,and acid and alkali *** importantly,the composite membrane has ultra-high flux in separating oil-in-water emulsions(29,003 L·m^(−2)·h^(−1)·bar^(−1))and oil/water mixture(51,444 L·m^(−2)·h^(−1)·bar^(−1)),which ensures high separation *** its durability,easy scale-up,and green regeneration,we envision this biomass-derived membrane will be an alternative to the existing commercial filter membrane in environmental remediation.

关键词： nanocellulose-based membrane oil/water emulsions separation ultra-high flux good durability anti-fouling property

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恢复振兴和田地区茧丝绸产业的对策建议

丝绸 2018年第1期55卷 1-8页

作者：李亚辉孔真乌鲁木齐职业大学组织人事部乌鲁木齐830001 乌鲁木齐职业大学信息工程学院乌鲁木齐830001

新疆和田地区自古以来就有种桑养蚕织绸的历史,以原苏联为代表的众多中亚、南亚"一带一路"沿线国家和新疆一直存在以"艾德莱斯"为代表的丝绸产品需求市场。种桑可以改善和田地区恶劣的生态环境,养蚕可以解决当地富余劳动力就业问题,织... 详细信息

新疆和田地区自古以来就有种桑养蚕织绸的历史,以原苏联为代表的众多中亚、南亚"一带一路"沿线国家和新疆一直存在以"艾德莱斯"为代表的丝绸产品需求市场。种桑可以改善和田地区恶劣的生态环境,养蚕可以解决当地富余劳动力就业问题,织绸可以发展当地经济和带动农民增收。恢复茧丝绸产业是做好民族地区产业扶贫、精准脱贫、跨越式发展、促进地区稳定的重要抓手。振兴茧丝绸产业是新疆发展家庭农场,推进农村一二三产业融合发展,促进纺织服装产业发展的重要选择。深入挖掘新疆民族特色丝绸资源,还可以丰富茧丝绸产品市场,增强中华文化凝聚力。

关键词：恢复振兴和田蚕桑茧丝绸产业

泡沫填充负泊松比蜂窝夹层结构的抗爆性能数值模拟

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兵工学报 2024年第9期45卷 3091-3104页

作者：孔祥清李若男常雅慧付莹辽宁工业大学土木建筑工程学院辽宁锦州121001 中国石油大学(华东)储运与建筑工程学院山东青岛266580 松山湖材料实验室广东东莞523000

为研究爆炸荷载作用下泡沫填充负泊松比蜂窝夹层结构(Foam-filled Auxetic Honeycomb Sandwich Structure,FAHSS)的动态响应及其对混凝土板的防护性能,利用有限元软件,考虑应变率对材料动态本构特性的影响,建立FAHSS在爆炸荷载下的有限... 详细信息

为研究爆炸荷载作用下泡沫填充负泊松比蜂窝夹层结构(Foam-filled Auxetic Honeycomb Sandwich Structure,FAHSS)的动态响应及其对混凝土板的防护性能,利用有限元软件,考虑应变率对材料动态本构特性的影响,建立FAHSS在爆炸荷载下的有限元数值模型。通过已有负泊松比蜂窝夹层结构(Auxetic Honeycomb Sandwich Structure,AHSS)的爆炸试验对数值模型进行验证,基于验证模型分析爆炸荷载作用下FAHSS的损伤破坏规律、能量吸收特性及其对混凝土板的应力分布影响,并与AHSS和FSS(Foam Sandwich Structure)进行对比。在此基础上综合考虑聚氨酯泡沫材料密度、爆炸比例距离及填充材料等因素对FAHSS抗爆性能的影响。研究结果表明:FAHSS中的泡沫填充降低了负泊松比蜂窝夹层结构的破坏程度;随着聚氨酯泡沫材料密度的增加,FAHSS中的泡沫材料吸收能量增加;随着比例距离的增加,FAHSS的破坏程度逐渐降低,破坏形态也由局部破坏转变为整体破坏。

关键词：负泊松比蜂窝夹层结构聚氨酯泡沫爆炸荷载防护性能有限元分析