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Regulating the electronic structure of Ir single atoms by ZrO_(2)nanoparticles for enhanced catalytic oxidation of formaldehyde at room temperature

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Chinese Chemical Letters 2024年第7期35卷 200-205页

作者： Shiqi Peng Yongfang Rao Tan Li yufei Zhang Jun-ji Cao shuncheng Lee yu Huang Key Laboratory of Aerosol Chemistry&Physics State Key Laboratory of Loess and Quaternary Geology(SKLLQG)Institute of Earth EnvironmentChinese Academy of Sciences(CAS)Xi’an 710061China School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China School of Environment and Energy South China University of TechnologyGuangzhou 51006China School of Environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100190China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China

Developing low-loading single-atom catalysts with superior catalytic activity and selectivity in formaldehyde(HCHO)oxidation at room temperature remains ***,ZrO_(2)nanoparticles coupled low-loading Ir single atoms in N-doped carbon(Ir_(1)-N-C/ZrO_(2))was *** optimal Ir_(1)-N-C/ZrO_(2)with 0.25 wt%Ir loading delivers the high HCHO removal and conversion efficiency(>95%)at 20℃,which is higher than that over Ir_(1)-N-C with the same Ir *** specific rate can reach 1285.6 mmol gIr^(-1)h^(-1),surpassing the Ir based catalysts reported to *** functional theory calculation results and electron spin resonance spectra indicate that the introduction of Zr O_(2)nanoparticles modulate the electronic structure of the Ir single atoms,promoting O_(2)activation to·O_(2)^(–).Moreover,the Ir-C-Zr channel is favorable for the dissociation of·O_(2)^(–)to active oxygen atom(*O),and further accelerates the transformation of HCHO and intermediates(dioxymethylene and formates)to CO_(2)and H_(2)*** work provides a facile strategy to design low-loading single-atom catalysts with high catalytic activity toward HCHO oxidation.

关键词： ZrO_(2)nanoparticles Ir single atoms Electronic structure Formaldehyde Catalytic oxidation

19.3% Efficiency ternary organic solar cells enabled by the alkyl side-chain effect of guest non-fullerene acceptors

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Science China Chemistry 2024年第8期67卷 2686-2693页

作者： Hongqian Wang Sijian Wu Daobin Yang Xueliang yu shuncheng Yang Pengfei Ding Pengyu Yan Zaifei Ma Jianfeng Zhang Ziyi Ge School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The effect of side-chain engineering of conjugated molecules on the morphology and device performance in binary organic solar cells has been widely investigated. However, this relationship has hardly been studied in the guest components of ternary organic solar cells. In this study, a family of non-fullerene guest acceptors, namely XY-3, XY-5 and XY-7, with hydrogen substituent,straight and branched alkyl chains on the bithiophene units, respectively, were designed and synthesized to understand their effects on aggregation properties and device performance. The straight and branched alkyl chains on the bithiophene units result in sightly blue-shifted absorption compared to the hydrogen substituent and the XY-7 demonstrates the most appropriate phase separation scale and the most balanced charge transport. Consequently, the OSCs based on D18:e C9:XY-7 achieve a high shortcircuit current density(JSC) and fill factor(FF), while maintaining the enhancement of the open-circuit voltage(VOC) achieving an efficiency of 19.32%, exceeding those of D18:e C9, D18:e C9:XY-3, D18:e C9:XY-5(PCE:18.28%, 19.04%, 18.75%, respectively). These results highlight that the side-chain engineering of Y series non-fullerene acceptors as the guest acceptors has great potential in optimizing morphology properties and promoting photovoltaic performance.

关键词： organic solar cells side chain engineering ternary strategy non-fullerene energy losses

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“屋有三分”思想下中国古代木结构建筑研究

城市建筑 2020年第23期17卷 51-52页

作者：于顺成湖南科技大学建筑与艺术设计学院湖南湘潭411201

中国古建筑最具代表性的是大木作结构建筑,本文以作者搜集到并识读过的资料为基础,简述中国古代的木结构营造技术,以较为简约的方式论述中国古代建筑。受"屋有三分"启示,文章从台基做法、屋身建造及屋顶构造进行分析,研究木结构建筑。

关键词：古建筑木结构营造技术屋有三分

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玉米收获机械关键装置结构特点及发展趋势

农机化研究 2019年第9期41卷 1-8页

作者：王建廷李耀明马征胡必友虞顺成江苏大学现代农业装备与技术教育部重点实验室江苏镇江212013 江苏沃得农业机械有限公司江苏镇江212300

玉米收获是玉米生产过程中的重要环节,收获机械的工作性能直接影响收获效果和工作效率。由于玉米果穗的结构特性,玉米收获过程中收获方式不当,易造成不必要的损失,因此对玉米收获机械的关键装置的结构有较高要求。对玉米收获机械关键装... 详细信息

玉米收获是玉米生产过程中的重要环节,收获机械的工作性能直接影响收获效果和工作效率。由于玉米果穗的结构特性,玉米收获过程中收获方式不当,易造成不必要的损失,因此对玉米收获机械的关键装置的结构有较高要求。对玉米收获机械关键装置的研究一直是玉米收获领域的重要研究内容,本文主要对玉米摘穗机、脱粒机和籽粒收获机的关键装置的工作原理、技术特点和优缺点进行简述,并讨论了我国玉米收获机械的发展趋势。

关键词：玉米分段收获机籽粒收获机发展

A novel RHT-TBD approach for weak targets in HPRF radar

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Science China Earth Sciences 2016年第12期59卷 59-72页

作者： Hongbo yu Guohong WANG Wei WU shuncheng TAN Institute of Information Fusion Naval Aeronautical and Astronautical University

A novel approach, which can handle ambiguous data from weak targets, is proposed within the randomized Hough transform track-before-detect(RHT-TBD) framework. The main idea is that, without the pre-detection and ambiguity resolution step at each time step, the ambiguous measurements are mapped by the multiple hypothesis ranging(MHR) procedure. In this way, all the information, based on the relativity in time and pulse repetition frequency(PRF) domains, can be gathered among different PRFs and integrated over time via a batch procedure. The final step is to perform the RHT with all the extended measurements, and the ambiguous data is unfolded while the detection decision is confirmed at the end of the processing *** classic methods, the new approach resolves the problem of range ambiguity and detects the true track for targets. Finally, its application is illustrated to analyze and compare the performance between the proposed approach and the existing approach. Simulation results exhibit the effectiveness of this approach.

关键词： high pulse repetition frequency weak targets track-before-detect randomized Hough transform multiple hypothesis ranging range ambiguity resolution

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玉米籽粒直收中籽粒及穗轴破损形态研究

农机化研究 2019年第10期41卷 208-212页

作者：虞顺成李耀明马征王建廷胡必友徐立章唐忠江苏大学现代农业装备与技术教育部重点实验室江苏镇江212013 江苏沃得农业机械有限公司江苏镇江212311

玉米籽粒直收是我国玉米收获技术的发展趋势,为了进一步降低玉米籽粒直收中籽粒破碎率,采用与沃得农业机械机有限公司联合研制的玉米稻麦联合收获机,对江苏省玉米品种"郑单958"进行籽粒直收试验,并对玉米籽粒及穗轴破损形态进行了研究... 详细信息

玉米籽粒直收是我国玉米收获技术的发展趋势,为了进一步降低玉米籽粒直收中籽粒破碎率,采用与沃得农业机械机有限公司联合研制的玉米稻麦联合收获机,对江苏省玉米品种"郑单958"进行籽粒直收试验,并对玉米籽粒及穗轴破损形态进行了研究分析。结果表明:玉米籽粒直收中籽粒破损形态主要为破碎籽粒、缺损籽粒及裂纹籽粒等,缺损籽粒中绝大多数为冠部缺损,有少数胚部缺损裂纹籽粒,各部位中冠部存在裂纹的比例最高,有胚的腹面存在裂纹的比例高于没有胚的背面,籽粒产生纵向裂纹大于产生横向裂纹的比例;玉米穗轴破损形态复杂,长度以2～6cm为主,断面比以1/4和1/2为主,穗轴小端完整度最大。该研究可为玉米联合收获机的进一步优化改进提供参考。

关键词：玉米玉米直收破损

Joint range ambiguity resolving and multiple maneuvering targets tracking in clutter via MMPHDF-DA

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Science China(Information Sciences) 2014年第8期57卷 117-128页

作者： TAN shuncheng WANG GuoHong WANG Na yu HongBo Institute of Information Fusion Technology Naval Aeronautical and Astronautical University Unit 92941 93 Element

It is difficult to track multiple maneuvering targets of which the number is unknown and timevarying,especially when there is range *** random finite sets(RFS)based probability hypothesis density filter(PHDF)is an effective solution to the problem of multiple targets ***,when tracking multiple targets via the range ambiguous radar,the problem of range ambiguity has to be *** this paper,a multiple model PHDF and data association(MMPHDF-DA)based method is proposed to address multiple maneuvering targets tracking with range ambiguous radar in ***,by introducing the turn rate of target and the discrete pulse interval number(PIN)as components of target state vector,and modeling the incremental variable of the PIN as a three-state Markov chain,the problem of multiple maneuvering targets tracking with range ambiguity is converted into a hybrid state filtering ***,by implementing a novel"track-estimate"oriented association with the filtering results of the hybrid filter,target tracks are provided at each time *** results demonstrate that the MMPHDF-DA can estimate target state as well as the PIN simultaneously,and succeeds in multiple maneuvering target tracking with range ambiguity in *** results also demonstrate that the MMPHDF-DA can overcome the limitation of the Chinese Remainder Theorem for range ambiguity resolving.

关键词： probability hypothesis density particle filter range ambiguity maneuvering target tracking data association

疏肝养血润目针灸法治疗水样液缺乏性干眼的疗效观察

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中国中医眼科杂志 2024年第9期34卷 840-845页

作者：于爱忠张敬敬葛顺成安致稳阴雅男唐山市丰润区人民医院唐山064099 石家庄眼科医院石家庄050051 乐亭县医院乐亭063699 唐山市中医医院唐山063099

目的观察疏肝养血润目针灸法治疗水样液缺乏性干眼(ATD)的临床疗效及安全性。方法纳入2021年6月—2023年6月唐山市丰润区人民医院诊治的ATD肝肾阴虚证患者98例(196只眼),采用随机数字表法分成对照组和治疗组,最终每组纳入48例(96只眼... 详细信息

目的观察疏肝养血润目针灸法治疗水样液缺乏性干眼(ATD)的临床疗效及安全性。方法纳入2021年6月—2023年6月唐山市丰润区人民医院诊治的ATD肝肾阴虚证患者98例(196只眼),采用随机数字表法分成对照组和治疗组,最终每组纳入48例(96只眼)。对照组予1.4%聚乙烯醇滴眼液治疗,治疗组在对照组基础上联合疏肝养血润目针灸法。2组均观察4周。分别于治疗前、后检测受试者的泪膜破裂时间(BUT)、泪液分泌试验(SⅠT)、角膜荧光染色(FL)、白细胞介素(IL)-1β、IL-6、金属基质蛋白酶-9(MMP-9)水平及中医证候积分。结果 (1)BUT:治疗前后比较,2组治疗后BUT均较治疗前延长,差异均有统计学意义(t_(治疗组)=50.217、t_(对照组)=40.909,均P=0.000)。治疗组治疗后BUT长于对照组,差异有统计学意义(t=7.349,P=0.000)。(2)SⅠT:治疗前后比较,2组治疗后SⅠT均较治疗前延长,差异均有统计学意义(t_(治疗组)=46.149、t_(对照组)=42.726,均P=0.000)。治疗组治疗后SⅠT长于对照组,差异有统计学意义(t=7.078,P=0.000)。(3)FL:治疗前后比较,2组治疗后FL均较治疗前降低,差异均有统计学意义(t_(治疗组)=50.398、t_(对照组)=42.955,均P=0.000)。治疗组治疗后FL低于对照组,差异有统计学意义(t=8.688,P=0.000)。(4)泪液炎症因子:治疗前后比较,2组治疗后IL-1β、IL-6及MMP-9水平均较治疗前降低,差异均有统计学意义(IL-1β:t_(治疗组)=71.214、t_(对照组)=51.982,均P=0.000;IL-6:t_(治疗组)=83.398、t_(对照组)=70.133,均P=0.000;MMP-9:t_(治疗组)=673.908、t_(对照组)=623.730,均P=0.000)。治疗组治疗后IL-1β、IL-6及MMP-9均低于对照组,差异均有统计学意义(t_(IL-1β)=10.708、t_(IL-6)=9.689、t_(MMP-9)=9.155,均P=0.000)。(5)中医证候积分:治疗前后比较,2组治疗后中医证候积分均较治疗前降低,差异均有统计学意义(t_(治疗组)=54.729、t_(对照组)=46.822,均P=0.000)。治疗组治疗后中医证候积分低于对照组,差异有统计学意义(t=11.622,P=0.000)。(6)临床疗效:治疗组总有效率为92.71%,高于对照组的82.29%,差异有统计学意义(χ~2=4.762,P=0.029)。(7)不良反应:2组不良反应比较,差异无统计学意义(P>0.05)。结论对ATD患者实施疏肝养血润目针灸法联合人工泪液治疗,可有效缓解症状,明显改善FL等泪膜稳定性指标,且安全性高。

关键词：疏肝养血润目针灸人工泪液水样液缺乏性干眼

PM_(2.5) and PM_(10-2.5) chemical composition and source apportionment near a Hong Kong roadway

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Particuology 2015年第1期13卷 96-104页

作者： Yan Cheng shuncheng Lee Zhaolin Gu Kinfai Ho yunwei Zhang yu Huang Judith C.Chow John G.Watson Junji Cao Renjian Zhang Department of Environmental Science and Technology School of Human Settlements and Civil EngineeringXi'an Jiaotong University State Key Laboratory of Loess Quaternary Geology Institute of Earth and EnvironmentChinese Academy of Sciences Department of Civil and Structural Engineering Research Center for Environmental Technology and ManagementThe Hong Kong Polytechnic University School of Public Health and Primary Care The Chinese University of Hong Kong Division of Atmospheric Sciences Desert Research Institute Key Laboratory of Regional Climate-Environment Research for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of Sciences

Twenty-four-hour PM2.5 and PM10 samples were collected simultaneously at a highly trafficked road-side site in Hong Kong every sixth day from October 2004 to September 2005. The mass concentrations of PM2.5, PMlo-2.5 （defined as PM10 - PM2.5）, organic carbon （OC）, elemental carbon （EC）, water-soluble ions, and up to 25 elements were determined. Investigation of the chemical compositions and potential sources revealed distinct differences between PM2.5 and PM10-2.5. The annual average mass concentrations were 55.5 ＋ 25.5 and 25.9±15.7μg/m^3 for PM2.5 and PM10-2.5, respectively. EC, OM （OM = OC × 1.4）, and ammonium sulfate comprised over -82% of PM2.5, accounting for -29%, -27%, and -25%, respectively, of the PM2.5 mass. Low OC/EC ratios （less than 1） for PM2.5 suggested that fresh diesel-engine exhaust was a major contributor. Seven sources were resolved for PM2.5 by positive matrix factorization （PMF） model, including vehicle emissions （-29%）, secondary inorganic aerosols （-27%）, waste incinera- tor/biomass burning （-23%）, residual oil combustion （-10%）, marine aerosols （-6%）, industrial exhaust （-4%）, and resuspended road dust （-1%）. EC and OM comprised only -19% of PM10-2.5. The average OC/EC ratio of PM10-2.5 was 7.8± 14.2, suggesting that sources other than vehicular exhaust were important contributors. The sources for PM10-2.5 determined by the PMF model included -20% traffic-generated resuspension （e.g., tire dust/brake linear/petrol evaporation）, -17% locally resuspended road dust, -17% marine aerosols, -12% secondary aerosols/field burning, and -11% vehicle emissions.

关键词： PM2.5 PM10-2.5 Roadside Chemical composition Source apportionment Hong Kong