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In-situ study of the hydrogen peroxide photoproduction in seawater on carbon dot-based metal-free catalyst under operation condition

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Nano Research 2024年第7期17卷 5956-5964页

作者： Jiaxuan Wang Jiacheng Li Zenan Li Jie Wu Honglin Si Yangbo Wu zhiyong guo Xuepeng Wang Fan Liao Hui Huang Mingwang Shao Yang Liu Zhenhui Kang Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Material Science and Chemical EngineeringNingbo UniversityNingbo 315211China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina

Hydrogen peroxide(H_(2)O_(2))photoproduction in seawater with metal-free photocatalysts derived from biomass materials is a green,sustainable,and ultra environmentally friendly ***,most photocatalysts are always corroded or poisoned in seawater,resulting in a significantly reduced catalytic ***,we report the metal-free photocatalysts(RUT-1 to RUT-5)with in-situ generated carbon dots(CDs)from biomass materials(Rutin)by a simple microwave-assisted pyrolysis *** visible light(λ≥420 nm,81.6 mW/cm^(2)),the optimized catalyst of RUT-4 is stable and can achieve a high H_(2)O_(2)yield of 330.36μmol/L in seawater,1.78 times higher than that in normal *** transient potential scanning(TPS)tests are developed and operated to in-situ study the H_(2)O_(2)photoproduction of RUT-4 under operation ***-4 has strong oxygen(O_(2))absorption capacity,and the O_(2)reduction rate in seawater is higher than that in *** cations in seawater further promote the photo-charge separation and facilitate the photo-reduction *** RUT-4,the conduction band level under operating conditions only satisfies the requirement of O_(2)reduction but not for hydrogen(H2)*** work provides new insights for the in-situ study of photocatalyst under operation condition,and gives a green and sustainable path for the H_(2)O_(2)photoproduction with metal-free catalysts in seawater.

关键词： carbon dots hydrogen peroxide photocatalysis transient potential scanning in-situ study operation condition

超声造影联合乳腺钼靶X线对乳腺导管内乳头状瘤的诊断价值

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影像技术 2024年第4期36卷 70-74页

作者：郭志勇包头医学院第二附属医院内蒙古014000

目的:研究分析超声造影联合乳腺钼靶X线对乳腺导管内乳头状瘤(DIP)的诊断价值。方法:选取我院在2022年1月-2024年1月期间收治的60例疑似DIP患者采取超声造影、乳腺钼靶X线检查,对比分析检查结果。结果:60例疑似DIP患者经病理检查显示,... 详细信息

目的:研究分析超声造影联合乳腺钼靶X线对乳腺导管内乳头状瘤(DIP)的诊断价值。方法:选取我院在2022年1月-2024年1月期间收治的60例疑似DIP患者采取超声造影、乳腺钼靶X线检查,对比分析检查结果。结果:60例疑似DIP患者经病理检查显示,将病理检查结果作为金标准,阳性检出56例,超声造影阳性检出46例,乳腺钼靶X线检出43例,阳性检出率分别为76.67%、71.67%,联合检查阳性检出55例,阳性检出率91.67%。敏感度、特异度和准确度对比,超声造影与乳腺钼靶X线比较无差异(P>0.05),联合检查敏感度和准确度则要高于超声造影、乳腺钼靶X线检查(P<0.05)。结论:在DIP的临床诊断中,采用超声造影、乳腺钼靶X线均有着良好优势,但是两者联合检测能够进一步提高诊断准确性。

关键词：超声造影乳腺钼靶X线乳腺导管内乳头状瘤

2019—2023年开封市尉氏县儿童和孕妇碘营养状况监测结果

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现代疾病预防控制 2024年第7期35卷 554-557页

作者：过治勇孙宁刘辉尉氏县疾病预防控制中心开封尉氏475500 河南省疾病预防控制中心

目的分析2019—2023年尉氏县儿童和孕妇碘营养状况,为制定碘缺乏病防控策略提供科学依据。方法2019—2023年每年在开封市尉氏县抽取200名8~10岁儿童和100名孕妇作为研究对象,分别采集儿童、孕妇随机尿样1次和家中食用盐盐样,检测尿碘和... 详细信息

目的分析2019—2023年尉氏县儿童和孕妇碘营养状况,为制定碘缺乏病防控策略提供科学依据。方法2019—2023年每年在开封市尉氏县抽取200名8~10岁儿童和100名孕妇作为研究对象,分别采集儿童、孕妇随机尿样1次和家中食用盐盐样,检测尿碘和盐碘含量;测定儿童甲状腺容积,筛查甲状腺肿,计算甲状腺肿大率。结果2019—2023年尉氏县1000份8~10岁儿童尿样中,尿碘中位数分别为114、139、166、142、177μg/L,按尿碘频数分布,100~<200μg/L最多,占44.70%;500份孕妇尿样中,尿碘中位数分别为189、166、212、237、194μg/L,按尿碘频数分布,150~250μg/L最多,为52.60%。儿童和孕妇碘营养水平均为适宜。1000名8~10岁儿童甲状腺肿大率为0.90%。碘盐覆盖率为98.27%,合格碘盐食用率为94.71%。结论2019—2023年尉氏县儿童和孕妇碘营养均处于适宜水平,8~10岁儿童甲状腺肿大率<5%,达到了国家碘缺乏病消除标准,建议继续实行食盐加碘为主的碘缺乏病防控策略,加强重点人群监测。

关键词：尿碘盐碘甲状腺肿儿童孕妇

Performance and EXIT analysis of parallel concatenated space time trellis codes

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Journal of Systems Engineering and Electronics 2009年第6期20卷 1193-1197页

作者： Yang Haifen Li Guangjun guo zhiyong Xiong Yong Dept. of Communication gc Information Engineering Univ. of Electronic Science and Technology of China Chengdu 010054 P. R. China Shanghai Research Center for Wireless Communlcations Shanghai 200050 P. R. China

Space time trellis coding （STTC） techniques have been proposed to achieve both diversity and coding gains in multiple input multiple output （MIMO） fading channels. But with more transmit antennas STTCs suffer from the design dificulty and complexity increasing. This paper proposes a scheme, named parallel concatenated space time trellis codes （PC-STTC）, to achieve the tradeoff between the performances and complexity of STTCs for a large number of transmit antennas. Simulation results and complexity comparison are provided to demonstrate the performance and superiority of the proposed scheme over conventional schemes in fast fading channels in low signal-to-noise ratio （SNR） regions. And an EXIT （extrinsic information transform） chart is given to analyze the iterative convergence of the proposed scheme. It shows that PC-STTC has better iterative convergence in low SNR regions.

关键词： space time trellis coding EXIT chart Log-MAP decoder convergence.

Special Topic: Novel Sensing Materials and Their Applications in Analytical Chemistry

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Journal of Analysis and Testing 2021年第1期5卷 1-2页

作者： Xi Chen zhiyong guo Department of Chemistry Xiamen UniversityXiamen 361005China Xiamen Huaxia University Xiamen 361024China

Over the past years,the development and analytical applications of sensors and sensing materials which are pursued with great interest by many researchers have shown a tremendous potential *** studies and applications... 详细信息

关键词： Analytical analytical electrochemical

基于转像激光立体视觉的油管接箍内螺纹参数检测

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工具技术 2024年第1期58卷 147-153页

作者：张瑾徐明明李风郭志永王晓君李肖中国石油化工股份有限公司胜利油田分公司中国石油化工股份有限公司胜利油田检测评价研究有限公司中国石油大学(华东)机电工程学院

油管接箍是油田钻井用重要连接工具,其内螺纹质量对于油气安全开采至关重要。针对现有油管接箍内螺纹接触式检测方法效率低、磨损大、光谱共焦等非接触式方法测量可达性差的问题,提出基于转像激光立体视觉的油管接箍内螺纹参数检测系统... 详细信息

油管接箍是油田钻井用重要连接工具,其内螺纹质量对于油气安全开采至关重要。针对现有油管接箍内螺纹接触式检测方法效率低、磨损大、光谱共焦等非接触式方法测量可达性差的问题,提出基于转像激光立体视觉的油管接箍内螺纹参数检测系统与方法,利用激光和反射镜实现内螺纹牙型轮廓的强化和转角窥视,借助已标定的相机模型参数,通过立体视觉和旋转进给重构纵截面中双侧牙型的三维点云,经进一步处理,从三维点云中计算出内螺纹螺距、齿高和锥度三项几何参数。依据美国石油协会(API)标准规定的参数容限范围实现油管接箍内螺纹质量的判定,研制出视觉系统,并与传统量具在相同工况下测量27/8与31/2英寸两种规格的油管内螺纹几何参数,结果表明,提出的视觉系统可实现内螺纹多项参数的一体化高精、高效测量,满足工业现场需求。

关键词：油管接箍内螺纹双目视觉测量内螺纹几何参数图像处理反射镜

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气流变化对柔性叶片颤振边界影响评估

内蒙古农业大学学报(自然科学版) 2024年第1期45卷 42-47页

作者：刘慧源韩巧丽田德冯晓梅郭志勇张明慧内蒙古农业大学机电工程学院内蒙古农业大学能源与交通工程学院新能源电力系统国家重点实验室(华北电力大学)

风力发电机组的叶片在接近颤振临界条件的复杂环境下运行时，可能会发生颤振并伴随着叶片的损坏。准确分析气动条件对颤振边界的影响，在大型风力发电机组的设计中起着至关重要的作用。本文研究对象为NREL 5 MW海上风电机组的柔性叶片... 详细信息

风力发电机组的叶片在接近颤振临界条件的复杂环境下运行时，可能会发生颤振并伴随着叶片的损坏。准确分析气动条件对颤振边界的影响，在大型风力发电机组的设计中起着至关重要的作用。本文研究对象为NREL 5 MW海上风电机组的柔性叶片，采用Beddoes-Leishman (B-L)模型与几何精确梁模型相结合的方法，对在不同气流条件下的柔性叶片进行模拟，研究风速和风向角对颤振边界的影响。研究结果表明，柔性叶片在21.5 r/min的转速下会出现不稳定现象，伴随着弯曲和扭转的耦合。风速加速度线性增长导致颤振临界速度逐渐增加，最终在24 r/min左右稳定。风向角的影响范围是围绕风轮旋转平面法线对称的140°扇形区域，随着风向角的增大，颤振临界速度呈现先增加后减小的趋势，风向角60°时颤振临界速度最大可达到24.9 r/min。

关键词：风电机组叶片颤振 FAST

The development and function of follicular helper T cells in immune responses

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Cellular & Molecular Immunology 2012年第5期9卷 375-379页

作者： Maogen Chen zhiyong guo Weiqiang Ju Bernhard Ryffel Xiaoshun He Song guo Zheng Organ Transplant Center 1st Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina Division of Rheumatology and Immunology Department of MedicineUniversity of2Division of Rheumatology and ImmunologyDepartment of MedicineUniversity of Southern CaliforniaKeck School of MedicineLos AngelesCAUSA UMR6218 Molecular ImmunologyUniversity of Orleans and CNRS3b rue de la FerollerieOrleansFrance

Follicular helper T cells （Tfh） have been referred as a lineage that provides a help for B cells to proliferate and undergo antibody affinity maturation in the germinal center. Evidence has supported that Tfh subset development, like other lineages, is dependent on microenvironment where a particular transcriptional program is initiated. It has been shown that Bcl-6 and IL-21 act as master regulators for the development and function of Tfh cells. Tfh dysregulation is involved in the development of autoimmune pathologies, such as systemic lupus erythematosus, rheumatoid arthritis and other autoimmune diseases. The present review highlights the recent advances in the field of Tfh cells and focus on their development and function.

关键词： autoimmune diseases follicular helper T cells systemic lupus erythematousus

Optimization of magnetic anomaly detection with single-axis sensor for pig locating in low latitude areas

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Petroleum 2019年第4期5卷 417-423页

作者： Wei Xu zhiyong guo Zhongxiang Liu Peng Zhang Yanxi Zhou School of Mechatronic Engineering Southwest Petroleum UniversityChengdu610500China

When a pig mounted with permanent magnets gets stuck in the pipeline,it can be located by detecting the magnetic anomalies on the ground using a single-axis magnetic *** order to collect the magnetic anomaly efficiently through single-axis magnetic sensor,a geometric detection model and calculation method for singleaxis magnetic anomaly detection is established in this *** distribution of magnetic inclination and declination of the measuring points is *** results indicate that the magnetic inclination of all measuring points vary within a small range of 2°,and this value is highly dependent on the magnetic sensor which is configured aboveground around the geomagnetic ***,the magnetic declination at different points of detection surface is subject to the geomagnetic components and the Y-axis component of the magnetic field of *** magnetic declinations distribute irregularly and vary in a wide ***,to achieve a high-efficiency detection with the single-axis sensor,the sensor shall be placed in such a manner that the magnetic inclination thereof coincides with the geomagnetic *** magnetic declination of the sensor can be calculated using s,the superposed Y-axis component induced by the permanent magnets,and the corresponding formula given in this *** article demonstrates the feasibility of locating a blocked pig in the pipeline based on the single-axis magnetic anomaly *** will have a practical significance in guiding the engineering detection.

关键词： Pig blockage Pig locating Single-axis magnetic anomaly Magnetic anomaly detection Optimized installation of sensor