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Electrospun Bi-decorated Bi_(x)Ti_(y)O_(z)/TiO_(2) flexible carbon nanofibers and their applications on degradating of organic pollutants under solar radiation

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Journal of Materials Science & Technology 2023年第19期150卷 114-123页

作者： Liangtao Yao Changpo sun Hui Lin Guisheng Li zichao Lian Ruixin Song Songlin Zhuang Dawei Zhang Engineering Research Center of Optical Instrument and System Ministry of Education and Shanghai Key Lab of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Standards and Quality Center of National Food and Strategic Reserves Administration Beijing 100834China Department of Chemistry College of ScienceUniversity of Shanghai for Science and TechnologyShanghai 200093China

Presently,photocatalytic degradation has emerged as an attractive and efficient technology for wastewater *** order to avoid hurdles,such as difficulty in the suspended photocatalyst segregation from the aqueous system and low reutilization rate,the strategy of immobilizing photocatalysts with electro-spun fibers has been widely ***,those methods usually require multi-step preparation and complex *** this,a novel metallic Bi-decorated flexible multiphase Bi_(x)Ti_(y)O_(z)/TiO_(2) electrospun carbon nanofibers(Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs)with high photocatalytic efficiency,good mechanical property,good stability,easy separation,and recovery were synthesized via a one-step approach of pre-oxidation and carbonization *** as-prepared Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs with multiphase Bi_(x)Ti_(y)O_(z),anatase TiO_(2),and metallic Bi particles embedded not only enhance the harvest of light but also pro-vide more separation paths for photogenerated carriers,which improve photocatalytic efficiency *** Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs(S3)exhibited excellent photocatalytic performance and the degradation rate of 10 mg L^(-1) Rhodamine B(RhB)was up to 97%in only 30 min under simulated sunlight ***,S3 exhibited stable activity during 5 cycles of experiments since the degradation rates remained at about 97%in 30 *** mechanism of degradation of RhB by Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs in the photocat-alytic process was also proposed based on active species trapping *** work in this paper shows that Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs are easy to prepare and have high photocatalytic ability and stability,thereby offering a new strategy in catalyst immobilization and wastewater treatment.

关键词： Electrospun nanofibers Photocatalyst Flexible

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基于直接数值模拟的涡环碰撞过程涡结构分析

力学学报 2024年第7期56卷 2004-2014页

作者：黄泊桦蒋子超王卓霖罗炫张仪姚清河杨耿超中山大学航空航天学院广州510006 桂林电子科技大学数学与计算科学学院广西桂林541004

涡环间的碰撞涉及复杂的多层级涡结构拓扑关系和涡量转移机理.深入研究该模型,有助于揭示涡结构之间相互作用过程所包含的机理.区别于现有研究一般专注于涡环小尺度次级结构的瞬态演化,本研究使用基于一种改进的SIMPLE算法的直接数值模... 详细信息

涡环间的碰撞涉及复杂的多层级涡结构拓扑关系和涡量转移机理.深入研究该模型,有助于揭示涡结构之间相互作用过程所包含的机理.区别于现有研究一般专注于涡环小尺度次级结构的瞬态演化,本研究使用基于一种改进的SIMPLE算法的直接数值模拟,结合整体动态演变与其涡结构细节对涡环碰撞模型进行分析.基于高分辨率网格,分析了在不同雷诺数下涡环碰撞后由涡重联分裂出的次级涡结构.研究表明,涡环碰撞过程伴随着复杂的涡结构拓扑变化,如高涡量区域的偏转及涡丝间的此消彼长.在碰撞时,环本身的不稳定性导致了局部接触后分裂出沿方位角规律分布的次级涡环.而次级结构本身随流场雷诺数的增加呈现出从无到有、从近似圆环状到湍流态的转变.最后,对多雷诺数下的涡拟能曲线进行横向比较以反映碰撞对流场的整体涡流强度影响.结果表明,雷诺数的提高对涡拟能的调控整体表现为初始时刻耗散速率降低;因碰撞而抬升的峰值提高;峰值对应的时间点先延后再前移.本研究基于直接数值模拟展示了涡结构演化的偏转、重联、湍流化等特征,揭示了雷诺数对涡环碰撞的部分调控机制,对复杂流动的涡系演化机理研究有启示作用.

关键词：涡环碰撞涡重联不稳定性涡拟能直接数值模拟

粪肥部分替代氮肥对盐碱地冬小麦产量与土壤养分的影响

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山东农业科学 2024年第9期56卷 157-163页

作者：肖柄政郭兵刘苹高新昊姚利贾洪玉孙涛杜章留赵自超养分资源高效利用全国重点实验室/农业农村部废弃物基质化利用重点实验室/山东省农业科学院农业资源与环境研究所山东济南250100 中国农业大学资源与环境学院生物多样性与有机农业北京市重点实验室北京100083 山东省农业科学院黄河三角洲现代农业研究院山东东营257091 东营黄河三角洲现代农业研究中心山东东营257091

为探讨不同种类粪肥部分替代氮肥对中度盐碱地上冬小麦产量与土壤养分的影响,本试验在山东省东营市河口区试验地上设置不施肥(CK)、施用化肥[CON:常规施肥处理,氮磷钾(N-P_(2)O_(5)-K_(2)O)用量=267-252-0 kg/hm^(2);OPT:优化施肥处理,... 详细信息

为探讨不同种类粪肥部分替代氮肥对中度盐碱地上冬小麦产量与土壤养分的影响,本试验在山东省东营市河口区试验地上设置不施肥(CK)、施用化肥[CON:常规施肥处理,氮磷钾(N-P_(2)O_(5)-K_(2)O)用量=267-252-0 kg/hm^(2);OPT:优化施肥处理,氮磷钾(N-P_(2)O_(5)-K_(2)O)用量=210-105-105 kg/hm^(2)]和优化施肥基础上粪肥替代15%或30%氮肥(牛粪肥替代处理代号:DM15和DM30;羊粪肥替代处理代号:SM15和SM30;鸡粪肥替代处理代号:CM15和CM30)共9个处理,研究其对中度盐碱地土壤理化性质、氮肥偏生产力、养分含量和小麦产量效益的影响。结果表明:相比对照(CK)各施肥处理显著增加小麦产量,相比CON,DM15、DM30和SM15处理小麦产量分别提高21.5%、17.7%和1.7%。相比CON,OPT和各粪肥部分替代氮肥处理能增加氮肥偏生产力。相比CON,各粪肥部分替代氮肥处理降低土壤容重和pH值,且土壤有机质含量增幅达32.7%~74.2%,但羊粪肥和鸡粪肥部分替代氮肥会增加土壤EC值。与CON相比,各粪肥部分替代氮肥处理土壤速效氮含量显著增加,速效钾含量均有提高且大多差异显著,土壤有效磷含量除DM30和SM15处理有一定幅度升高外其他处理均降低但差异均不显著,均提高土壤氮钾养分活化系数。DM15、DM30和SM15处理可以提高小麦经济收益,其中DM15处理相比CON增收57.03%,效果最好。综上看出,牛粪肥部分替代氮素化肥(DM15、DM30)可以较大幅度增加小麦产量,提升土壤养分水平,增加经济效益。

关键词：粪肥盐碱地冬小麦产量土壤养分

QTL mapping and QTL × environment interaction analysis of multi-seed pod in cultivated peanut(Arachis hypogaea L.)

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The Crop Journal 2019年第2期7卷 249-260页

作者： Liang Wang Xinlei Yang Shunli Cui Guojun Mu Xingming sun Lifeng Liu zichao Li Key Lab of Crop Heterosis and Utilization Ministry of Education Beijing Key Lab of Crop Genetic Improvement China Agricultural University College of Agronomy Hebei Agricultural University North China Key Laboratory for Crop Germplasm Resources of Education Ministry Crop Research Institute Xinjiang Academy of Agricultural and Reclamation Science

To dissect the genetic mechanism of multi-seed pod in peanut, we explored the QTL/gene controlling multi-seed pod and analyzed the interaction effect of QTL and environment. Two hundred and forty eight recombinant inbred lines(RIL) from cross Silihong × Jinonghei 3 were used as experimental materials planted in 8 environments from 2012 to 2017. Three methods of analysis were performed. These included individual environment analysis, joint analysis in multiple environments, and epistatic interaction analysis for multi-seed pod QTL. Phenotypic data and best linear unbiased prediction(BLUP) value of the ratio of multi-seed pods per plant(RMSP) were used for QTL mapping. Seven QTL detected by the individual environmental mapping analysis and were distributed on linkage groups 1, 6, 9, 14, 19(2), and 21. Each QTL explained 4.42%–11.51% of the phenotypic variation in multi-seed pod, and synergistic alleles of5 QTL were from the Silihong parent. One QTL, explaining 4.93% of the phenotypic variation was detected using BLUP data, and this QTL mapped in the same interval as q RMSP19.1 detected in the individual environment analysis. Seventeen additive QTL were identified by joint analysis across multiple environments. A total of 43 epistatic QTL were detected by ICIM-EPI mapping in the multiple environment trials(MET) module, and involved 57 loci. Two main-effect QTL related to multi-seed pod in peanut were filtered. We also found that RMSP had a highly significant positive correlation with pod yield per plant(PY), and epistatic effects were much more important than additive effects. These results provide theoretical guidance for the genetic improvement of germplasm resources and further fine mapping of related genes in peanut.

关键词： Best linear unbiased prediction BLUP QTL × environment interaction Ratio of multi-seed pod RMSP

双轴自清洁反应器“8”字壳开孔接管结构外压稳定性研究

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轻工机械 2024年第5期42卷 20-26页

作者：魏子超孙超李庆生陆玮南京工业大学机械与动力工程学院江苏南京211816 江苏省特种设备安全监督检验研究院泰州分院靖江所江苏泰州214500

针对双轴自清洁反应器“8”字壳开孔接管结构承受外压过大时易发生失稳的问题,课题组提出采用有限元分析方法进行双轴自清洁反应器“8”字壳开孔接管结构外压稳定性研究,当接管中心线和“8”字壳垂直中心线的距离X分别取0.0a,0.4a和0.5a... 详细信息

针对双轴自清洁反应器“8”字壳开孔接管结构承受外压过大时易发生失稳的问题,课题组提出采用有限元分析方法进行双轴自清洁反应器“8”字壳开孔接管结构外压稳定性研究,当接管中心线和“8”字壳垂直中心线的距离X分别取0.0a,0.4a和0.5a,径厚比D_(o)/δ_(e)分别取30,40,50,60和70,长径比L/D_(o)分别取2,3,4,5和6,开孔率d/D分别取010,0.25,0.40,0.55和0.70,接管壁厚和筒体壁厚比δ_(e)t/δ_(e)分别取0.2,0.6,1.0,1.4和1.8时,探究各结构参数与临界失稳压力削弱系数K的关系。研究结果表明:接管壁厚和筒体壁厚比δ_(e)t/δ_(e)和长径比L/D_(o)较小及开孔率d/D和径厚比D_(o)/δ_(e)较大时,开孔接管对“8”字壳外压承载能力削弱严重。

关键词：双轴自清洁反应器 “8”字壳开孔接管结构外压稳定性分析临界失稳压力削弱系数

抗原改造联合纳米肿瘤疫苗用以克服肿瘤新抗原短缺及在多种肿瘤类型上激起强效抗肿瘤免疫反应

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Science Bulletin 2024年第7期69卷 922-932页

作者：陈宏宇黄子超李佳玄董思徐玉笛马胜赵佳雨刘丽萍孙天盟宋万通陈学思 School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Key laboratory of Polymer Ecomaterials Changchun Institue of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education Institute of ImmunologyThe First HospitalJilin UniversityChangchun 130021China Jilin Biomedical Polymers Engineering Laboratory Changchun 130022China

Neoantigen cancer vaccines have been envisioned as one of the most promising means for cancer ***,identifying neoantigens for tumor types with low tumor mutation burdens continues to limit the effectiveness of neoantigen ***,we proposed a "hit-and-run" vaccine strategy which primes T cells to attack tumor cells decorated with exogenous "neo-antigens".This vaccine strategy utilizes a peptide nanovaccine to elicit antigen-specific T cell responses after tumor-specific decoration with a nanocarrier containing the same peptide *** demonstrated that a poly(2-oxazoline)s(POx) conjugated with OVA_(257-264) peptide through a matrix metalloprotease 2(MMP-2) sensitive linker could efficiently and selectively decorate tumor cells with OVA peptides in ***,a POx-based nanovaccine containing OVA_(257-264) peptides to elicit OVA-specific T cell responses was *** combination with this hit-and-run vaccine system,an effective vaccine therapy was demonstrated across tumor types even without OVA antigen *** approach provides a promising and uniform vaccine strategy against tumors with a low tumor mutation burden.

关键词： Cancer immunotherapy Cancer vaccine Neoantigen Nanocarrier Poly(2-oxazoline)s

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基于深度卷积神经网络的遥感影像目标检测

上海航天 2018年第5期35卷 18-24页

作者：孙梓超谭喜成洪泽华董华萍沙宗尧周松涛杨宗亮武汉大学遥感信息工程学院湖北武汉430079 上海机电工程研究所上海201109 城市空间信息工程北京市重点实验室北京100038

随着遥感影像数据规模的快速扩张,如何高效准确地识别遥感影像中的典型目标成为当前的研究热点。为解决传统遥感影像目标检测方法准确率低的问题,用基于深度卷积神经网络进行遥感影像目标检测,在遥感影像数据集上用基于Faster-RCNN的神... 详细信息

随着遥感影像数据规模的快速扩张,如何高效准确地识别遥感影像中的典型目标成为当前的研究热点。为解决传统遥感影像目标检测方法准确率低的问题,用基于深度卷积神经网络进行遥感影像目标检测,在遥感影像数据集上用基于Faster-RCNN的神经网络模型对VGG16卷积网络进行训练,对输入的遥感影像通过区域推荐网络标注出待检目标的包围框和置信度,实现对遥感影像的目标检测。以飞机和油罐为例,在TensorFlow深度学习框架下实现了数据预处理、网络训练、目标检测等功能,并在当前测试数据集上取得了较高的检测准确率和置信度。该研究成果可应用于遥感影像解译和处理等相关领域。

关键词：深度卷积神经网络遥感影像目标检测区域卷积神经网络深度学习 TensorFlow框架

Assessing indica-japonica differentiation of improved rice varieties using microsatellite markers

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Journal of Genetics and Genomics 2009年第5期36卷 305-312页

作者： Yongwen Qi Hongliang Zhang Dongling Zhang Meixing Wang Junli sun Li Ding Fenghua Wang zichao Li Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Laboratory of Crop Genetic Improvement. China Agricultural University Beijing 100094 China Guangdong Key Laboratory of Sugarcane Improvement & Biorefinery Guangzhou Sugarcane Industry Research Institute Guangzhou 510316 China Institute of Crop Science. Chinese Academy of Agricultural Sciences Beijing 100081 China The Centre of Biotechnology Research Jilin Academy of Agricultural Sciences Changchun 130124 China

To assess the indica-japonica differentiation of improved rice varieties, a total of 512 modem varieties including 301 indica and 211 japonica accessions were analyzed using 36 microsatellites. The Fst coefficients ranged from 0.002 to 0.730 among the loci with an average of 0.315. Significant differentiation was detected at 94.4% of the loci studied （P 〈 0.05, pairwise Fst tests）, indicating that there was a high level of indica-japonica differentiation within the improved varieties. At 18 loci, about 74%-98% of the alleles of indica and japonica accessions were distributed in two ranges of amplicon length. Linkage disequilibrium analysis showed that the distribution trends were significantly nonrandomly associated. Using the differentiation trends at the 18 loci, microsatellite index （MI） was proposed for discrimination of the two subspecies. When rice accessions with MI value greater than zero were classified as indica, and those with MI value smaller than zero were classified as japonica, about 96.1% of the accessions could be classified. This result agrees with the classification based on morphological-physiological characters, indicating that this method is feasible and effective.

关键词： improved rice varieties indica-japonica differentiation microsatellite index (MI)

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昆仑雪菊标志性黄酮化合物的分离与鉴定

食品科学 2024年第20期45卷 48-56页

作者：孙森王梦溪舒鹏李名洁殷晨悦吴子超李思为李文庆辛志宏南京农业大学食品科学技术学院食品加工与质量控制重点实验室江苏南京210095 深圳市护家科技有限公司HBN研究所和生物实验室广东深圳518000

本研究以总黄酮含量和1,1-二苯基-2-硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)自由基清除率为指标,结合高效液相色谱(high performance liquid chromatography,HPLC)分析,对3种昆仑雪菊进行溶剂提取和参数优化。结果表明,最佳萃取溶剂为甲醇,黄酮得率最高的昆仑雪菊品种为1号,所得提取物的总黄酮含量为65.01 mg/g,DPPH自由基清除率为73.59%。HPLC-质谱(mass spectrometry,MS)初步鉴定了昆仑雪菊中含量最高的10种黄酮类化合物,利用大孔树脂、减压柱层析、常压柱层析和凝胶层析分离纯化提取物得到8个单体化合物,利用MS和核磁共振等技术鉴定出这8个化合物分别为木犀草素、7,8,3’,4’-四羟基二氢黄酮、二氢槲皮素、奥卡宁、槲皮素、槲皮万寿菊素、黄诺马苷和马里苷,并通过HPLC分析和DPPH自由基清除活性确定昆仑雪菊中的标志性黄酮化合物为奥卡宁。

关键词：昆仑雪菊黄酮类化合物标志性黄酮结构鉴定