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Protonated acetone ion chemical ionization time-of-flight mass spectrometry for real-time measurement of atmospheric ammonia

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Journal of Environmental Sciences 2022年第4期34卷 66-74页

作者： Fengshuo Dong hang li Bing liu Ruidong liu Keyong hou Environment Research Institute Shandong UniversityQingdao 266237China Key Laboratory of Separation Science for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Ammonia(NH_(3))is ubiquitous in the atmosphere,it can affect the formation of secondary aerosols and particulate matter,and cause soil eutrophication through ***,the use of radioactive primary reagent ion source and the humidity interference on the sensitivity and stability are the two major issues faced by chemical ionization mass spectrometer(CIMS)in the analysis of atmospheric *** this work,a vacuum ultraviolet(VUV)Kr lamp was used to replace the radioactive source,and acetone was ionized under atmospheric pressure to obtain protonated acetone reagent ions to ionize *** ionization source is designed as a separated three-zone structure,and even 90 vol.%high-humidity samples can still be directly analyzed with a sensitivity of sub-ppbv.A signal normalization processing method was designed,and with this new method,the quantitative relative standard deviation(RSD)of the instrument was decreased from 17.5%to9.1%,and the coefficient of determination was increased from 0.8340 to *** humidity correction parameters of the instrument were calculated from different humidity,and the ammonia concentrations obtained under different humidity were converted to its concentration under zero humidity condition with these correction *** analytical time for a single sample is only 60 sec,and the limit of detection(LOD)was 8.59 pptv(signalto-noise ratio S/N=3).The ambient measurement made in Qingdao,China,in January 2021 with this newly designed CIMS,showed that the concentration of ammonia ranged from 1 to 130 ppbv.

关键词： Ammonia(NH_(3)) Chemical ionization mass spectrometer(CIMS) Vacuum ultraviolet(VUV)lamp Single photon ionization Real-time analysis

一种基于超立方体多处理机系统的快速诊断算法

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计算机技术与发展 2008年第8期18卷 43-46,49页

作者：孙丽萍杭后俊腾莉安徽师范大学计算机系安徽芜湖241000

为了提高可诊断系统的诊断度,可以采用悲观诊断策略进行诊断。超立方体是一种应用广泛的互连网络拓扑结构,具有可并行处理的某些性质,且n维超立方体是(2n-2)/(2n-2)-可诊断的。文中在MM*模型下,研究了超立方体的诊断问题,提出了一个O(Nl... 详细信息

为了提高可诊断系统的诊断度,可以采用悲观诊断策略进行诊断。超立方体是一种应用广泛的互连网络拓扑结构,具有可并行处理的某些性质,且n维超立方体是(2n-2)/(2n-2)-可诊断的。文中在MM*模型下,研究了超立方体的诊断问题,提出了一个O(Nlog2N)的悲观诊断算法,N是处理器总数。而经典的YML算法所需时间为O(N2.5)。因此,文中的算法在时间复杂度方面是高效的。

关键词：系统级故障诊断悲观诊断算法超立方体 MM*模型

Controlled fabrication and microwave absorbing mechanism of hollow Fe3O4@C microspheres

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Science China Chemistry 2017年第6期60卷 740-747页

作者： Yanhui hou Huili Yuan hang Chen Junhai Shen liangchao li Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of Chemistry Zhejiang Normal University

Uniform core-shell SiO2@Fe_3O_4@C microspheres were prepared by a one-step hydrothermal method with SiO_2 microspheres as the template, and the hollow Fe_3O_4@C(HFC) microspheres were achieved via etching SiO_2 template. By changing the sizes of SiO_2 microspheres, a series of HFC microspheres with variable cavity sizes were obtained to study the relationship between cavity size and microwave absorbing(MA) performance for the first time. The morphology and structure of samples were characterized in detail. The results showed that the MA performance of HFC sample depended on its cavity size. In particular, the hollow structure was good for improving MA performance and could make MA move to the high-frequency region. More importantly, as the cavity size increases, the resonance frequency of HFC-i(i=1,2, 3, 4) samples moved to a low frequency, and the optimal matching thickness of HFC-i samples was increasing. Among all HFC-i samples, HFC-3 showed the most excellent MA performance,which could be mainly explained by the quarter-wavelength matching model, intrinsical magnetic and dielectric loss. Furthermore,the MA performance of HFC mixture blended by the equal mass fraction of HFC-2, HFC-3 and HFC-4 was the comprehensive results of three HFC-i samples. All the above suggested that the cavity size in HFC sample had a great influence on the MA performance.

关键词： microwave absorbing Fe_3O_4@C cavity size

Activin A receptor type 1C single nucleotide polymorphisms associated with esophageal squamous cell carcinoma risk in Chinese population

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 39-51页

作者： Si-Yun lin hou Huang Jin-Jie Yu Feng Su Tian Jiang Shao-Yuan Zhang Lu Lv Tao Long Hui-Wen Pan Jun-Qing Qi Qiang Zhou Wei-Feng Tang Guo-Wen Ding li-Ming Wang li-Jie Tan Jun Yin Department of Thoracic Surgery Zhongshan Hospital Affiliated to Fudan UniversityShanghai 200032China Shanghai Key Laboratory of Clinical Geriatric Medicine Huadong Hospital Affiliated to Fudan UniversityShanghai 200040China Department of Cardiothoracic Surgery The Affiliated People's Hospital of Jiangsu UniversityZhenjiang 212002Jiangsu ProvinceChina Department of Thoracic Surgery Sichuan Cancer Hospital&InstituteChengdu 610042Sichuan ProvinceChina Department of Cardiothoracic Surgery Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjing 210000Jiangsu ProvinceChina Department of Respiratory and Critical Care Medicine Shanghai Xuhui Central HospitalShanghai 200032China

BACKGROUND Transforming growth factor-β(TGF-β)superfamily plays an important role in tumor progression and *** A receptor type 1C(ACVR1C)is a TGF-βtype I receptor that is involved in tumorigenesis through binding to dif-ferent *** To evaluate the correlation between single nucleotide polymorphisms(SNPs)of ACVR1C and susceptibility to esophageal squamous cell carcinoma(ESCC)in Chinese Han *** In this hospital-based cohort study,1043 ESCC patients and 1143 healthy controls were *** SNPs(rs4664229,rs4556933,rs77886248,rs77263459,rs6734630)of ACVR1C were assessed by the ligation detection reaction ***-Weinberg equilibrium test,genetic model analysis,stratified analysis,linkage disequi-librium test,and haplotype analysis were *** Participants carrying ACVR1C rs4556933 GA mutant had significantly decreased risk of ESCC,and those with rs77886248 TA mutant were related with higher risk,especially in older male *** the haplotype analysis,ACVR1C Trs4664229Ars4556933Trs77886248Crs77263459Ars6734630 increased risk of ESCC,while Trs4664229Grs4556933Trs77886248Crs77263459Ars6734630 was associated with lower susceptibility to *** ACVR1C rs4556933 and rs77886248 SNPs were associated with the susceptibility to ESCC,which could provide a potential target for early diagnosis and treatment of ESCC in Chinese Han population.

关键词： Activin A receptor type 1C Single nucleotide polymorphisms Esophageal squamous cell carcinoma Genetic susceptibility Hospital-based cohort study

Eco-friendly co-catalyst-free cycloaddition of CO_(2)and aziridines activated by a porous MOF catalyst

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Science China Chemistry 2021年第8期64卷 1316-1322页

作者： Ying Shi Jian Zhao hang Xu Sheng-li hou Bin Zhao Department of Chemistry Key Laboratory of Advanced Energy Material ChemistryNankai UniversityTianjin300071China

Cycloaddition of CO_(2) with aziridines is an important reaction to obtain high-value *** MOFs can catalyze this reaction,but co-catalysts are still necessary to improve the catalytic *** a reaction catalyzed by MOFs-based materials without co-catalyst has not been reported ***,a porous and stable three-dimensional(3D)framework{[Ni(DCTP)]·6.5DMF}_(n)(1)with a large Langmuir surface area of 3,789 m^(2)/g was synthesized,which displayed high I2 adsorption ability up to 731.0 mg/g and could release it ***,it exhibited a high CO_(2) adsorption capacity of 104.0 cm^(3)/g at 273 *** investigation results revealed 1 could effectively catalyze the cycloaddition of CO_(2) and aziridines in the absence of additional co-catalyst,and it could maintain the catalytic activity after five ***,1 also exhibited high catalytic activity for the gram-scale ***,it is the first MOF material as a heterogeneous catalyst for the conversion of CO_(2) and aziridines without co-catalyst.

关键词： MOFs heterogeneous catalyst co-catalyst-free CO_(2)capture CO_(2)fixation aziridines

Constructing Donor–Acceptor‑linked COFs Electrolytes to Regulate Electron Density and Accelerate the li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao hang Ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong Guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective li^(+)transportation and conduction in solid-state li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer *** other reported COFbased solid-state electrolyte,the developed concept with D–A-linked COFs not only achieves electronic modulation to promote highly-selective li^(+)migration and inhibit li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state li metal *** introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in li metal symmetric cell and high-capacity retention in li/liFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances li^(+)***,we anticipate that this work creates insight into the strategy for accelerating li^(+)conduction in high-performance solid-state li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state li metal battery

Typical diseases of a long-span concrete-filled steel tubular arch bridge and their effects on vehicle-induced dynamic response

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Frontiers of Structural and Civil Engineering 2020年第4期14卷 867-887页

作者： Jianling hou Weibing XU Yanjiang CHEN Kaida Zhang hang SUN Yan li College of Architecture and Civil Engineering Bejing University of TechnologyBejing 100124China School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China

A long-span concrete-filled steel tubular(CFST)arch bridge suffers severe vehicle-induced dynamic responses during its service ***,few quantitative studies have been reported on the typical diseases suffered by such bridges and their effects on vehicle-induced dynamic ***,a series of field tests and theoretical analyses were conducted to study the effects of typical diseases on the vehicle-induced dynamic response of a typical CFST arch *** results show that a support void results in a height difference between both sides of the expansion joint,thus increasing the effect of vehicle impact on the main girder and *** impact factor of the displacement response of the main girder exceeds the design *** variation of the suspender force is significant,and the diseases are found to have a greater effect on a shorter *** theoretical analysis results also show that the support void causes an obvious longitudinal displacement of the main girder that is almost as large as the vertical *** support void can also cause significant changes in the vehicle-induced acceleration response,particularly when the supports and steel box girder continue to collide with each other under the vehicle load.

关键词： long-span arch bridge expansion joint disease vehicle-bridge coupling vibration dynamic response

Optimized Method for Real-time Texture Reconstruction with RGB-D Camera

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Transactions of Tianjin University 2017年第5期23卷 493-500页

作者： Yonghong hou hang li Chuankun liu liang Zhang School of Electrical and Information Engineering Tianjin University Tianjin lishen Battery Joint-Stock Co. Ltd Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology School of Electrical Engineering and Automation Tianjin Polytechnic University

With the appearance of RGB-D camera, the field of three-dimensional (3D) reconstruction receives more and more attention. In this paper, we present an optimization approach to produce high-quality textured 3D models based on the real-time 3D reconstruction system. The resulting models of real-time texture reconstruction often suffer from blurring, ghosting, and other artifacts. Our approach addresses this texture quality problem using blur detection and an optimized weight function. Experimental results demonstrate that our approach can improve the quality of textured 3D models by reducing the blur and ghosts on the model surface. © 2017, Tianjin University and Springer-Verlag GmbH Germany.

关键词： Cameras Image reconstruction

Enhanced Antibacterial Activities of La/Zn-doped BiNbO4 Nanocomposites

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Chemical Research in Chinese Universities 2017年第6期33卷 917-923页

作者： hou Yanhui YUAN Huili CHEN hang DING Yan li liangchao College of Chemistry and life Sciences Zhejiang Normal University Jinhua 321004 P. R. China

Bi1-xLaxNbO4 and Bi1-xZnxNbO4 nanocomposites were prepared by a simple coprecipitation method, and their composition, structure and morphology were characterized by modern testing techniques. The antibacterial activities of the as-prepared samples against Staphylococcus aureus, Escherichia coli and Candida albicans were measured by the experiments of powder inhibition zone, inhibition zone diameter and minimum inhibitory concentration under the irradiation of sunlight. The results show that the antibacterial activities of BiNbO4 doped with La and Zn are superior to that of the parent, and the composition of antibacterial agent and their mass ratio have a great influence on the antibacterial activities. Among these, the antibacterial activity of Bi0.96La0.04NbO4 against three bacteria was best and its antibacterial activity to Candida albicans was better than those to the other two kinds.

关键词： La Zn BiNbO4 Doping Antibacterial activity