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Rapidly and mildly transferring anatase phase of graphene-activated TiO2 to rutile with elevated Schottky barrier:Facilitating interfacial hot electron injection for Vis-NIR driven photocatalysis

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Nano Research 2022年第12期15卷 10142-10147页

作者： Weiyao Hu qiyuan Li Dong Xu Guangyao Zhai Shinan Zhang Dong Li Xiaoxiao he Jinping Jia Jiesheng Chen Xinhao Li School of Chemistry and Chemical Engineering Environmental Science and Engineeringand Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai200241China

Visible and even infrared(IR)light-initiated hot electrons of graphene(Gr)catalysts are a promising driven power for green,safe,and sustainable H2O2 synthesis and organic synthesis without the limitation of bandgap-dominated narrow light absorption to visible light confronted by conventional ***,the life time of photogenerated hot electrons is too short to be efficiently used for various photocatalytic ***,we proposed a straightforward method to prolong the lifetime of photogenerated hot electrons from graphene by tuning the Schottky barrier at Gr/rutile interface to facilitate the hot electron *** rational design of Gr-coated TiO2 heterojunctions with interface synergy-induced decrease in the formation energy of the rutile phase makes the phase transfer of TiO2 support proceed smoothly and rapidly via ball *** optimized Gr/rutile dyad could provide a H2O2 yield of 1.05 mM·g-1·h-1 under visible light irradiation(λ≥400 nm),which is 30 times of the state-of-the-art noble-metal-free titanium oxide-based photocatalyst,and even achieves a H2O2 yield of 0.39 mM·g-1·h-1 on photoexcitation by near-infrared-region light(~800 nm).

关键词： hot electrons phase transition Schottky barrier heterojunction catalyst visible-near infrared ray(Vis-NIR)driven photocatalysis

Probing dark matter particles from evaporating primordial black holes via electron scattering in the CDEX-10 experiment

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 83-91页

作者： Zhenhua Zhang Litao Yang Qian Yue Kejun Kang Yuanjing Li Haipeng An Greeshma C. Jianping Chang Yunhua Chen Jianping Cheng Wenhan Dai Zhi Deng Changhao Fang Xinping Geng Hui Gong Qiuju Guo Tao Guo Xuyuan Guo Li he Shengming he Jinwei Hu Hanxiong Huang Tuchen Huang Lin Jiang S.Karmakar Haubin Li Hanyu Li Jianmin Li Jin Li Qianyun Li Renmingjie Li Xueqian Li Yulan Li Yifan Liang Bin Liao FongKay Lin ShinTed Lin Jiaxuan Liu Shukui Liu Yandong Liu Yu Liu Yuanyuan Liu Hao Ma Yucai Mao qiyuan Nie Jinhua Ning Hui Pan Ningchun Qi Jie Ren Xichao Ruan Monoj Kumar Singh Tianxi Sun Changjian Tang Yang Tian Guangfu Wang Junzheng Wang Li Wang Qing Wang Yufeng Wang Yunxiang Wang henry Tsz-King Wong Shiyong Wu Yucheng Wu Haoyang Xing Rui Xu Yin Xu Tao Xue Yulu Yan Nan Yi Chunxu Yu Haijun Yu Jianfeng Yue Ming Zeng Zhi Zeng Bingtao Zhang Fengshou Zhang Lei Zhang Zhenyu Zhang Jizhong Zhao Kangkang Zhao Minggang Zhao Jifang Zhou Zuying Zhou Jingjun Zhu CDEX Collaboration Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Institute of Physics Academia SinicaTaipei 11529China NUCTECH Company Beijing 100084China YaLong River Hydropower Development Company Chengdu 610051China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China College of Physics Sichuan UniversityChengdu 610065China School of Physics Peking UniversityBeijing 100871China Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413China Sino-French Institute of Nuclear and Technology Sun Yet-sen UniversityZhuhai 519082China School of Physics Nankai UniversityTianjin 300071China Department of Physics Banaras Hindu UniversityVaranasi 221005India Department of Physics Beijing Normal UniversityBeijing 100875China 不详

Dark matter(DM)is a major constituent of the ***,no definite evidence of DM particles(denoted as“χ”)has been found in DM direct detection(DD)experiments to *** is a novel concept of detectingχfrom evaporating primordial black holes(PBHs).We search forχemitted from PBHs by investigating their interaction with target *** examined PBH masses range from 1×10^(15)to 7×10^(16)g under the current limits of PBH abundance *** 205.4 kg·day data obtained from the CDEX-10 experiment conducted in the China Jinping Underground Laboratory,we exclude theχ-electron(χ-e)elastic-scattering cross sectionσ_(χe)~5×10^(-29)cm^(2)forχwith a mass■keV from our *** the higher radiation background but lower energy threshold(160 eV),CDEX-10 fills a part of the gap in the previous ***(m_(χ),σ_(χe))can be determined in the future,DD experiments are expected to impose strong constraints on fPBHfor large MPBHs.

关键词： CDEX primordial black hole light dark matter particle dark matter-electron scattering high purity germanium detector

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Chemical characteristics of PM_(2.5) during dust storms and air pollution events in Chengdu,China

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Particuology 2013年第1期11卷 70-77页

作者： qiyuan Wang Junji Cao Zhenxing Shen JunTao Shun Xiao Lei Luo Qingyang he Xinying Tang Department of Environmental Science and Engineering Xi'an Jiaotong University Key Lab of Aerosol Science & Technology SKLLQGInstitute of Earth EnvironmentChinese Academy of Sciences Institute of Global Environmental Change Xi'an Jiaotong University South China Institute of Environmental Sciences SEPA Meteorological Bureau of Baoji Municipality Climate Center of Shaanxi Meteorological Bureau Institute of Plateau Meteorology CMA Institute of Plateau Meteorology CMAChengdu

Daily fine particulate （PM2.5） samples were collected in Chengdu from April 2009 to February 2010 to investigate their chemical profiles during dust storms （DSs） and several types of pollution events, including haze （HDs）, biomass burning （BBs）, and fireworks displays （FDs）. The highest PM2.5 mass concentrations were found during DSs （283.3 μg/m^3）, followed by FDs （212.7 μg/m^3）, HDs （187.3 μg/m^3 ）, and BBs （130.1 μ g/m^3）. The concentrations of most elements were elevated during DSs and pollution events, except for BBs. Secondary inorganic ions （NO3^- , SO4^2-, and NH4^＋） were enriched during HDs, while PM2.5 from BBs showed high K^＋ but low SO4^2- , FDs caused increases in K^＋ and enrichment in SO4^2-. Ca^2＋. was abundant in DS samples, Ion-balance calculations indicated that PM2.5 from HDs and FDs was more acidic than on normal days, but DS and BB particles were alkaline. The highest organic carbon （OC） concentration was 26.1 μg/m^3 during FDs, followed by BBs （23.6 μg/m^3 ）, HDs （19.6 μg/m^3 ）, and DSs （18.8 μg/m^3 ）. In contrast, elemental carbon （EC） concentration was more abundant during HDs （10.6μg/m^3） and FDs （9.5 μg/m^3） than during BBs （6.2μg/m^3） and DSs （6.0 μg/m^3）. The highest OC/EC ratios were obtained during BBs, with the lowest during HDs. SO4^2＋ /K^＋ and TCA/SO4^2- ratios proved to be effective indicators for differentiating pollution events. Mass balance showed that organic matter, SO4^2-, and NO3^- were the dominant chemical components during pollution events, while soil dust was dominant during DSs.

关键词： PM2.5 Chemical species Pollution events Mass balance

腹腔镜与经肛腔镜辅助双镜联合代直肠切除吻合口重建术的疗效与安全性:单中心51例报告

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中国普通外科杂志 2024年第4期33卷 569-577页

作者：周佐霖黄斌杰何炎炯刘铎李嘉敏周文彬朱苗苗黄小艳秦启元蔡建马腾辉深圳市第二人民医院(深圳大学第一附属医院)肛肠外科中山大学附属第六医院普通外科(结直肠外科、放射性肠损伤中心)/广东省结直肠盆底疾病研究重点实验室广州市黄埔区中六生物医学创新研究院广东广州510655 中山大学附属第六医院临床营养与微生态科广东广州510655 中国医学科学院肿瘤医院深圳医院胃肠外科广东深圳518116 中山大学附属第六医院药学部广东广州510655

背景与目的:代直肠切除吻合口重建手术可成功恢复多数直肠吻合失败及肿瘤局部复发患者的肠道连续性,避免患者永久性肠造口。然而该手术难度大、手术相关并发症发生率高。手术方式及入路的选择在降低手术难度、确保手术安全性及降低术后... 详细信息

背景与目的:代直肠切除吻合口重建手术可成功恢复多数直肠吻合失败及肿瘤局部复发患者的肠道连续性,避免患者永久性肠造口。然而该手术难度大、手术相关并发症发生率高。手术方式及入路的选择在降低手术难度、确保手术安全性及降低术后并发症方面具有重要意义。因此,本研究总结单中心8年间行腹腔镜与经肛腔镜辅助双镜联合代直肠切除吻合重建的手术经验,以期为临床提供循证参考。方法:回顾性收集中山大学附属第六医院结直肠外科2015年10月—2023年8月51例行代直肠切除吻合重建患者的病历资料。其中,24例行经肛腔镜辅助双镜联合代直肠切除吻合口重建术(双镜联合组),27例行腹腔镜代直肠切除吻合重建术(腹腔镜组)。分析全组患者的术中、术后情况,并比较双镜联合组与腹腔镜组相关临床指标的差异。结果:51例患者均顺利完成代直肠切除吻合口重建手术。消化道重建吻合方式包括Bacon手术30例、Dixon手术5例、Parks手术15例、括约肌间切除术1例。51例患者中,拖出切除二期结肠肛管吻合30例、拖出切除单吻合5例、拖出切除双吻合3例、一期手工吻合13例。其中,术前已有肠造口患者42例、术后行新增预防性肠造口6例、术后未行预防性肠造口3例。全组中位手术时间为296(251~349)min,术中出血量为100(50~200)mL;双镜联合组与腹腔镜组的手术时间、术中出血量差异均无统计学意义(均P>0.05)。术中经肛门取标本共24例,其中腹腔镜组5例,双镜联合组19例,差异有统计学意义(P0.05),但双镜联合组的术后排气时间、术后进食时间短于腹腔镜组(均P<0.05)。全组无术后转入ICU治疗和住院期间死亡,9例肿瘤局部复发患者术后组织病理学检查结果均显示标本切缘未见肿瘤。51例患者中,16例发生并发症(Clavien-Dindo并发症分级Ⅱ级9例、Ⅲ级及以上7例),其中双镜联合组4例(16.67%),腹腔镜组12例(44.44%),差异有统计学意义(χ^(2)=4.554,P=0.033)。结论:代直肠切除吻合重建手术方式及入路的选择应根据患者初次手术吻合失败类型、病变距肛门距离、患者全身情况以及单位医疗水平制定个体化方案。相比单纯的腹腔镜代直肠切除,经肛腔镜辅助双镜联合代直肠切除吻合重建手术具有术后恢复快和术后并发症发生率低的优势。此外,两种术式进行代直肠切除吻合口重建术后的肠造口回纳率、远期肛门功能以及生活质量方面的差异仍需要进一步随访。

关键词：直肠肿瘤再手术器官保留治疗腹腔镜手术后并发症

氮肥管理对有序机抛早稻产量及氮素利用的影响

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湖南农业大学学报（自然科学版） 2024年第1期50卷 1-8页

作者：覃斌孙鑫刘福强何在周向军陶祖豪王慰亲郑华斌唐启源湖南农业大学农学院湖南长沙410128

以常规早稻品种湘早籼24号为材料,于2021—2022年开展大田试验,设3个氮肥水平,即120 kg/hm^(2)(N1)、150 kg/hm^(2)(N_(2))和180 kg/hm^(2)(N_(3)),4个氮肥分配处理T1、T2、T3、T4,基肥、分蘖肥、穗肥的施用比例分别为1∶1∶1、0∶1∶1... 详细信息

以常规早稻品种湘早籼24号为材料,于2021—2022年开展大田试验,设3个氮肥水平,即120 kg/hm^(2)(N1)、150 kg/hm^(2)(N_(2))和180 kg/hm^(2)(N_(3)),4个氮肥分配处理T1、T2、T3、T4,基肥、分蘖肥、穗肥的施用比例分别为1∶1∶1、0∶1∶1、1∶0∶1、1∶1∶0,以生产推荐施肥CK(施氮量120kg/hm^(2),基肥、分蘖肥、穗肥的施用比例为5∶3∶2)和零氮处理(N0)为对照,研究施氮量和氮肥分配对有序机抛早稻产量、生长特性及氮素利用的影响。结果表明:N_(3)、N_(2)、N1的早稻平均产量依次降低,N1的平均产量显著低于CK而高于N0的;在不同氮肥分配下,T2的产量低于T1、T3、T4和CK的,其中显著低于T4的;分析产量构成因子发现,产量的降低主要缘于单位面积穗数的下降;基肥不施氮肥的T2处理的分蘖率虽未显著降低,但其成穗率低,导致单位面积有效穗数下降;随着施氮量的增加,早稻氮素利用率随之下降;在不同氮肥分配下,T2的氮肥吸收利用率、氮肥农学利用率均显著低于T4的。可见,基肥缺失氮肥对有序机抛早稻的产量和氮素利用率影响较大,而穗肥不施氮肥对有序机抛早稻的产量和氮素利用率影响较小,推测前期氮肥管理可能是水稻有序机抛栽培高产的关键因子。

关键词：早稻氮肥分配有序机抛产量氮肥利用率

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High-Speed Railway Train Timetable Conflict Prediction Based on Fuzzy Temporal Knowledge Reasoning

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Engineering 2016年第3期2卷 366-373页

作者： he Zhuang Liping Feng Chao Wen qiyuan peng Qizhi Tang School of.Transpfrtation anfl Logistics S outhwestJiaotong University Chengclu 610031 China China Railway Corporation Beijing 100844. China National United Engineering Laboratory of Integrated and Intelligent Transportation SouthwestJiaotong University Chengdu 610031. China Depamnent of Civil and Environmental Engineering University of Waterloo. Waterloo N2L 3G I Canada

Trains are prone to delays and deviations from train operation plans during their operation because of internal or external disturbances. Delays may develop into operational conflicts between adjacent trains as a result of delay propagation, which may disturb the arrangement of the train operation plan and threaten the operational safety of trains. Therefore, reliable conflict prediction results can be valuable references for dispatchers in making more efficient train operation adjustments when conflicts occur. In contrast to the traditional approach to conflict prediction that involves introducing random disturbances, this study addresses the issue of the fuzzification of time intervals in a train timetable based on historical statistics and the modeling of a high-speed railway train timetable based on the concept of a timed Petri net. To measure conflict prediction results more comprehensively, we divided conflicts into potential conflicts and certain conflicts and defined the judgment conditions for both. Two evaluation indexes, one for the deviation of a single train and one for the possibility of conflicts between adjacent train operations, were developed using a formalized computation method. Based on the temporal fuzzy reasoning method, with some adjustment, a new conflict prediction method is proposed, and the results of a simulation example for two scenarios are presented. The results prove that conflict prediction after fuzzy processing of the time intervals of a train timetable is more reliable and practical and can provide helpful information for use in train operation adjustment, train timetable improvement, and other purposes.

关键词： High-speed railway Train timetable Conflict prediction Fuzzy temporal knowledge reasoning

西北部分地区密点麻蜥线粒体基因系统进化分析

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现代畜牧兽医 2024年第4期 30-33页

作者：宋飞黄增妹陈博昊何绍微唐隆重杨启元李铀西北民族大学生命科学与工程学院甘肃兰州730100 西北民族大学生物医学研究中心甘肃省动物细胞技术创新中心甘肃兰州730030

研究旨在探讨西北地区密点麻蜥的系统进化关系,对密点麻蜥的线粒体ND2与ND4基因进行扩增并测序,基于ND2与ND4基因与国内其他麻蜥品种构建系统进化树,分析系统进化关系。结果显示,甘肃盐池湾与内蒙古鄂前旗的密点麻蜥存在基因流。基于ND... 详细信息

研究旨在探讨西北地区密点麻蜥的系统进化关系,对密点麻蜥的线粒体ND2与ND4基因进行扩增并测序,基于ND2与ND4基因与国内其他麻蜥品种构建系统进化树,分析系统进化关系。结果显示,甘肃盐池湾与内蒙古鄂前旗的密点麻蜥存在基因流。基于ND2基因建立的系统进化树显示,宁夏沙坡头的密点麻蜥M88与内蒙古乌审旗的M102也存在基因流。研究表明,为保护密点麻蜥的种质资源和维护物种多样性,在制定保护措施时应避免过度的基因交流,并适当控制与近缘物种的渗透杂交。

关键词：线粒体DNA 密点麻蜥系统进化分析

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双能量CT虚拟平扫在颈部扫描中的应用价值

肿瘤预防与治疗 2024年第2期37卷 156-161页

作者：马月何长久胡仕北周鹏林礼波胡云涛李齐远四川省肿瘤临床医学研究中心四川省肿瘤医院·研究所四川省癌症防治中心电子科技大学附属肿瘤医院影像科成都610041

目的:探讨双能量CT(dual-energy computed tomography,DECT)虚拟平扫(virtual non-contrast,VNC)在颈部扫描中的图像质量和辐射剂量。方法:回顾性收集49例行颈部常规平扫(true non-contrast,TNC)+DECT增强扫描的患者,利用后处理软件得到VNC图像。对比TNC和VNC图像的客观图像质量[不同组织(颌下腺、甲状腺、胸锁乳突肌、颈内静脉、脂肪、颈椎椎体、气管气体)的CT值、噪声和信噪比(signal-to-noise ratio,SNR)]和主观评分。并比较TNC+增强扫描与单独增强扫描的辐射剂量[容积CT剂量指数(volume CT dose index,CTDIvol)、剂量长度乘积(dose length product,DLP)、有效剂量(effective dose,ED)]。结果:VNC和TNC图像颌下腺、颈内静脉、胸锁乳突肌、气管气体的CT值差异均无统计学意义(均P>0.05);VNC图像甲状腺、颈椎椎体的CT值低于TNC,而脂肪的CT值高于TNC,差异均有统计学意义(均P0.05)。VNC的SNR(25.14±9.85)与TNC(26.36±9.46)相比,差异无统计学意义(t=0.630,P>0.05)。单独双能量增强扫描的CTDIvo[l(7.48±0.33)mGy]、DLP[(194.06±22.90)***]和ED[(0.41±0.05)mSv]明显低于TNC+双能量增强扫描[(19.67±1.21)mGy、(503.82±66.11)***、(1.06±0.14)mSv],差异均有统计学意义(t=68.808、31.308、31.308,均P<0.05)。结论:VNC在颈部扫描中可获得与TNC大致相当的图像质量,且能明显降低患者的辐射剂量。

关键词：双能量CT 虚拟平扫常规平扫图像质量辐射剂量

氮肥运筹对有序机抛晚稻产量及氮素利用率的影响

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中国稻米 2024年第2期30卷 26-30页

作者：覃斌王慰亲郑华斌孙鑫何在周刘福强向军陶祖豪陈宏景唐启源湖南农业大学农学院长沙410000

采用裂区设计,探究了不同氮肥运筹方式对有序机抛晚稻生长发育、产量和氮肥利用率的影响。主区为施氮量(N),设3个水平,分别为120 kg/hm^(2)(N1)、150 kg/hm^(2)(N2)和180 kg/hm^(2)(N3);副区为氮肥分配比例(基肥:分蘖肥:穗肥),设4个水平... 详细信息

采用裂区设计,探究了不同氮肥运筹方式对有序机抛晚稻生长发育、产量和氮肥利用率的影响。主区为施氮量(N),设3个水平,分别为120 kg/hm^(2)(N1)、150 kg/hm^(2)(N2)和180 kg/hm^(2)(N3);副区为氮肥分配比例(基肥:分蘖肥:穗肥),设4个水平,分别为1∶1∶1(T1)、0∶1∶1(T2)、1∶0∶1(T3)和1∶1∶0(T4)。以农民习惯施肥为对照(CK,氮肥用量120 kg/hm^(2),基肥∶分蘖肥∶穗肥=5∶3∶2),另设一不施氮处理(N0)。结果表明,相同施氮量下,T2处理的水稻产量显著低于T1、T3和T4处理及CK,T4处理的产量高于T1处理和CK。表明施用基肥有助于提高有序机抛晚稻的产量。氮肥利用方面,T2处理的氮肥利用率显著低于其他处理;T4处理的氮肥农学利用率(NAE)显著高于T1和T3处理,但与CK差异不显著;T1、T3、T4处理和CK在氮肥偏生产力(NPFP)、氮素籽粒生产效率(NUEg)、氮肥生理利用率(NPE)和氮素收获指数(NHI)等方面差异较小。可见,前期氮肥施用对有序机抛晚稻生长发育、产量形成和氮素利用具有显著调控效应,而后期氮肥施用影响相对较小。

关键词：水稻有序机抛产量氮素利用效率