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Progress of crystalline carbon nitride in synthesis,atomic structure characterization and photocatalysis

Nano Research 2025年第1期18卷 455-476页

作者： Yueyang Tan Zhongyan Zhang yayun Pu Zongzhao Sun Limin Huang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China School of Traffic and Environment Shenzhen Institute of Information TechnologyShenzhen 518172China College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276000China School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China

Crystalline carbon nitride(CCN)has emerged as a highly promising semiconductor photocatalyst with unique properties,such as enhanced charge migration rate,reduced carrier recombination probability,narrow band gap and improved light-harvesting efficiency,which are suitable for a wide range of applications in solar-to-chemical conversion,energy storage,therapeutic and environmental pollution *** the past few years,there has been an increasing number of reviews on CCN ***,most of these reviews mainly focus on synthesis methods,modification and applications,with less emphasis on the relationship between structures and properties,as well as on indepth exploration of the crystalline *** electronic instability of CCN presents challenges for conventional characterization techniques to directly and thoroughly investigate the relationship between its intrinsic atom structure and photocatalytic *** mini-review not only highlights the progress in CCN-based photocatalysts,with a focus on molten-salt synthesis(including solid-salt-induced crystallization),but also emphasizes the atomic structure characterization by specifically introducing the differential phase contrast(DPC)scanning transmission electron microscopy(STEM)technique,which is essential for enhancing our understanding of the crystal structure and photocatalytic mechanisms of ***,the review outlines the photocatalytic performance and puts forward potential challenges on CCN *** review will provide a clearer understanding of the relationship in developing precise customization strategies for CCN materials and ultimately explain the regularity and specificity of the enhanced performance in targeted photocatalytic systems.

关键词： crystalline carbon nitride synthesis characterization photocatalysis

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乳腺黏液癌患者超声图像特征与PR、ER、HER-2、ER、Ki-67的相关性

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贵州医科大学学报 2023年第11期48卷 1392-1398页

作者：刘晓明张蓓赵丽娜周雅筠李硕贵州医科大学附属医院超声中心贵州贵阳550004

目的探讨乳腺黏液癌患者肿块超声图像特征与孕激素受体(PR)、雌激素受体(ER)、人表皮生长因子受体2(HER-2)、细胞增殖抗原标记物(Ki-67)的相关性。方法选取102例手术切除乳腺肿块且病理确诊乳腺黏液癌的患者为研究对象,采用彩色多普勒... 详细信息

目的探讨乳腺黏液癌患者肿块超声图像特征与孕激素受体(PR)、雌激素受体(ER)、人表皮生长因子受体2(HER-2)、细胞增殖抗原标记物(Ki-67)的相关性。方法选取102例手术切除乳腺肿块且病理确诊乳腺黏液癌的患者为研究对象,采用彩色多普勒超声诊断仪检测患者肿块的超声图像特征(肿块部位、大小、形态、边界、内部回声、钙化灶、血流信号、纵横比及腋窝淋巴结转移情况)并进行乳腺影像报告和数据系统(BI-RADS)分级评估;取所有患者切除的乳腺黏液癌肿块,制作切片,采用免疫组织化学(IHC)法检测组织中PR、ER、HER-2及Ki-67的表达;采用Phi系数(φ)检验和非条件二分类logistic回归分析乳腺黏液癌患者超声图像特征与PR、ER、HER-2、Ki-67表达的关系。结果乳腺黏液癌组织中ER、HER-2、Ki-67表达与BI-RADS分级3~5类差异有统计学意义(P0.05);患者淋巴结转移与PR阳性表达有相关性(P0.05);非条件二分类logistic回归分析结果表明,淋巴结转移是影响PR、ER阳性表达的危险因素(P<0.05)。结论乳腺黏液癌患者超声图像特征与PR、ER、HER-2、Ki-67表达存在一定相关性。

关键词：乳腺肿瘤孕激素类雌激素类表皮生长因子超声图像特征乳腺影像报告和数据系统

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Interactive Visual Analysis on the Attack and Defense Drill of Grid Cyber-physical Systems

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CSEE Journal of Power and Energy Systems 2021年第1期7卷 45-56页

作者： Kehe Wu Jiawei Li yayun Zhu Siwei Miao Sixun Zhu Chunjie zhou North China Electric Power University Beijing102206China China Electric Power Research Institute Beijing100031China Huazhong University of Science and Technology Wuhan430074China

The open and distributed connection of the powersystem makes it vulnerable to various potential cyber-attacks,which may lead to power outages and even casualties. Therefore,the construction of attack and defense drill (ADD) platforms forattack mechanism investigation and protection strategy evaluationhas become a research hotspot. However, for the massiveand heterogeneous security analysis data generated during thedrill, it is rare to have a comprehensive and intuitive methodto visually and efficiently display the perspective of the attackerand defender. In order to solve this problem, this paper proposesa visual analysis scheme of an ADD framework for a grid cyberphysicalsystem (GCPS) based on the interactive visual analysismethod. Specifically, it realizes system weakness discovery basedon knowledge visualization, optimization of the detection modeland visualization interaction. Finally, the case study on thesimulation platform of ADD proves the effectiveness of theproposed method.

关键词： Attack and defense drill(ADD) attack path interactive visual analysis intrusion detection

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超声和PET/CT定性及定量指标联合应用在乳腺癌诊断中的价值

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贵州医科大学学报 2021年第4期46卷 421-427,435页

作者：王兆雄谷颖张蓓赵丽娜付蕾周雅筠贵州医科大学附属医院超声中心贵州贵阳550004 贵州医科大学影像学院贵州贵阳550004

目的探讨超声或正电子发射断层显像/X线计算机体层成像(PET/CT)检查单独或联合应用在乳腺癌诊断中的应用价值。方法选取同期行超声检查和PET/CT检查且均获得术后病理确诊的90例乳腺肿块,根据肿瘤性质分为恶性组(n=60)及良性组(n=30),比... 详细信息

目的探讨超声或正电子发射断层显像/X线计算机体层成像(PET/CT)检查单独或联合应用在乳腺癌诊断中的应用价值。方法选取同期行超声检查和PET/CT检查且均获得术后病理确诊的90例乳腺肿块,根据肿瘤性质分为恶性组(n=60)及良性组(n=30),比较2组患者超声检查指标[肿瘤大小、形态、边界、分叶、钙化、阻力指数(RI)及转移淋巴结]和PET/CT检查指标[肿瘤大小、形态、边界、毛刺、密度、最大标准化摄取值(SUV max)及转移淋巴结]的差异;用有统计学差异的指标建立Logistic回归模型,用Hosmer-Lemeshow检验模型的拟合效果,绘制受试者工作特征曲线(ROC),以ROC曲线下面积(AUC)评价超声和PET/CT定性及定量指标(单独超声、单独超声指标联合、单独PET/CT指标、单独PET/CT指标联合及超声与PET/CT指标总联合)对乳腺癌的诊断效能。结果两组患者超声的大小、形态、边界、RI及转移淋巴结指标和PET/CT的大小、形态、毛刺、密度、边界、SUV max及转移淋巴结指标比较,差异有统计学意义(P<0.05);超声和PET/CT总指标联合的AUC(0.999)高于超声单独指标联合(0.914)或PET/CT单独指标联合的AUC(0.994),差异有统计学意义(P<0.05)。结论超声和PET/CT定性及定量指标联合应用对乳腺癌诊断效能高于单一的超声单独指标联合或PET/CT单独指标联合。

关键词：乳腺肿瘤超声检查,多普勒,彩色超声正电子发射断层显像/X线计算机体层成像方差分析回归分析

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不同薄壳山核桃品种果实形态特征分析

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陕西农业科学 2022年第9期68卷 70-73,94页

作者：张建设申明海章礼运周亚运余开慧周传涛高畅河南省信阳市林业科学研究所河南信阳464031 河南鸡公山森林生态系统国家定位观测研究站河南信阳464031

为豫南地区薄壳山核桃引种及良种选育提供基础数据,试验以信阳引种的5号、13号、20号、21号、35号、64号、104号等7个主栽薄壳山核桃品种为对象,测定其果质量、果纵横径、果皮厚度、坚果质量、坚果纵横径、坚果壳厚度、种仁质量、出仁... 详细信息

为豫南地区薄壳山核桃引种及良种选育提供基础数据,试验以信阳引种的5号、13号、20号、21号、35号、64号、104号等7个主栽薄壳山核桃品种为对象,测定其果质量、果纵横径、果皮厚度、坚果质量、坚果纵横径、坚果壳厚度、种仁质量、出仁率以及果形指数等果实形态指标,结果显示:除坚果壳厚度指数外,其余特征指数间均存在显著差异;果质量、坚果质量、种仁质量、出仁率均以104号、5号为佳;坚果壳厚度以5号、64号为薄;果形指数以104号、64号为大。研究表明:不同薄壳山核桃品种果实形态特征差异明显,同一品种并不兼备所有优异性,综合分析,引种的薄壳山核桃品种中104号、5号在果实形态中显示出果重、壳薄、出仁率高等优良特性,可作为信阳地区主栽品种的优选对象。

关键词：薄壳山核桃品种出仁率果实形态

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Y_2O_3:Eu^(3+)红色荧光粉的水热合成及性能研究

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广东化工 2015年第2期42卷 14-15,6页

作者：周亚运张艳红杨瑞岩香罗锦维周强汪正良云南民族大学化学与生物技术学院云南省生物高分子功能材料工程技术研究中心云南昆明650500

利用水热法合成了Y2O3:Eu3+荧光粉,并对所制得的样品进行了XRD、SEM以及荧光光谱等表征。荧光测试结果表明,Eu3+掺杂浓度为5%时制备的Y2O3:Eu3+荧光粉荧光强度最好。其最大发射峰位于612 nm,对应于Eu3+的5D0→7F2电偶极跃迁,最大激发波... 详细信息

利用水热法合成了Y2O3:Eu3+荧光粉,并对所制得的样品进行了XRD、SEM以及荧光光谱等表征。荧光测试结果表明,Eu3+掺杂浓度为5%时制备的Y2O3:Eu3+荧光粉荧光强度最好。其最大发射峰位于612 nm,对应于Eu3+的5D0→7F2电偶极跃迁,最大激发波长为240 nm对应于从O2-的2p轨道到Eu3+的4f轨道的电荷转移跃迁。通过对比,发现采用水热法制备的荧光粉要比固相法发光性能更强。

关键词： Y2O3 Eu3+ 红色荧光粉水热法发光材料

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常规超声、超声造影、钼靶X线、磁共振成像及联合检测对早期乳腺癌患者的诊断价值

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贵州医科大学学报 2023年第2期48卷 172-176页

作者：周雅筠谢瑾张蓓赵丽娜项一宁谷颖贵州医科大学医学影像学院贵州贵阳550004 贵州医科大学附属医院超声中心贵州贵阳550004 贵州医科大学附属医院病理科贵州贵阳550004

目的探讨常规超声、超声造影(CEUS)、钼靶X线及磁共振成像(MRI)联合检测对早期乳腺癌患者的诊断价值。方法收集均行常规超声、CEUS、钼靶X线、MRI检查的21例乳腺癌和20例乳腺良性病变患者的资料,以病理组织学为金标准,比较4种检查方法... 详细信息

目的探讨常规超声、超声造影(CEUS)、钼靶X线及磁共振成像(MRI)联合检测对早期乳腺癌患者的诊断价值。方法收集均行常规超声、CEUS、钼靶X线、MRI检查的21例乳腺癌和20例乳腺良性病变患者的资料,以病理组织学为金标准,比较4种检查方法单独及联合应用对乳腺癌诊断的敏感度、特异度、阳性预测值、阴性预测值及准确性,制作受试者工作特征曲线(ROC)、计算曲线下面积(AUC)评估4种检查方式单独或联合应用对诊断早期乳腺癌的能力。结果CEUS检查单独诊断早期乳腺癌的特异度、阳性预测值、阴性预测值及准确性最好,MRI检查的敏感度最好;4种影像学技术联合应用时对乳腺癌诊断的敏感度、特异度、阳性预测值、阴性预测值及准确性均高于两两组合、或3种影像学技术的组合方式,诊断效能最好。结论常规超声、CEUS、钼靶X线及MRI 4种影像学技术联合应用对早期乳腺癌具有较高的诊断效能。

关键词：磁共振成像早期乳腺癌超声造影常规超声钼靶X线联合诊断

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Rotary-scaling fine-tuning (RSFT) method for optimizing railway wheel profiles and its application to a locomotive

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Railway Engineering Science 2020年第2期28卷 160-183页

作者： Yunguang Ye yayun Qi Dachuan Shi Yu Sun Yichang zhou Markus Hecht Institute of Land and Sea Transport Systems Technical University of Berlin10587 BerlinGermany State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610331China College of Transportation Science and Engineering Nanjing Tech UniversityNanjing 210009China

The existing multi-objective wheel profile optimization methods mainly consist of three sub-modules:(1)wheel profile generation,(2)multi-body dynamics simulation,and(3)an optimization *** the first module,a comparably conservative rotary-scaling finetuning(RSFT)method,which introduces two design variables and an empirical formula,is proposed to fine-tune the traditional wheel profiles for improving their engineering *** the second module,for the TRAXX locomotives serving on the Blankenburg–Rubeland line,an optimization function representing the relationship between the wheel profile and the wheel–rail wear number is established based on Kriging surrogate model(KSM).For the third module,a method combining the regression capability of KSM with the iterative computing power of particle swarm optimization(PSO)is proposed to quickly and reliably implement the task of optimizing wheel ***,with the RSFT–KSM–PSO method,we propose two wear-resistant wheel profiles for the TRAXX locomotives serving on the Blankenburg–Rubeland line,namely S1002-S and *** S1002-S profile minimizes the total wear number by 30%,while the S1002-M profile makes the wear distribution more uniform through a proper sacrifice of the tread wear number,and the total wear number is reduced by 21%.The quasi-static and hunting stability tests further demonstrate that the profile designed by the RSFT–KSM–PSO method is promising for practical engineering applications.

关键词： Wheel profile optimization Wear reduction Rotary-scaling fine-tuning Particle swarm optimization Kriging surrogate model

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Ultrafine Vacancy-Rich Nb_(2)O_(5)Semiconductors Confined in Carbon Nanosheets Boost Dielectric Polarization for High-Attenuation Microwave Absorption

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Nano-Micro Letters 2023年第10期15卷 478-493页

作者： Zhe Su Shan Yi Wanyu Zhang Xiaxi Xu yayun Zhang Shenghu zhou Bo Niu Donghui Long Shanghai Key Laboratory of Multiphase Materials Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China Key Laboratory for Specially Functional Materials and Related Technology of the Ministry of Education East China University of Science and TechnologyShanghai 200237People’s Republic of China

The integration of nano-semiconductors into electromagnetic wave absorption materials is a highly desirable strategy for intensifying dielectric polarization loss;achieving high-attenuation microwave absorption and realizing in-depth comprehension of dielectric loss mechanisms remain ***,ultrafine oxygen vacancy-rich Nb_(2)O_(5)semiconductors are confined in carbon nanosheets(ov-Nb_(2)O_(5)/CNS)to boost dielectric polarization and achieve high *** polarization relaxation,electromagnetic response,and impedance matching of the ov-Nb_(2)O_(5)/CNS are significantly facilitated by the Nb_(2)O_(5)semiconductors with rich oxygen vacancies,which consequently realizes an extremely high attenuation performance of-80.8 dB(>99.999999%wave absorption)at 2.76 *** a dielectric polarization center,abundant Nb_(2)O_(5)–carbon heterointerfaces can intensify interfacial polarization loss to strengthen dielectric polarization,and the presence of oxygen vacancies endows Nb_(2)O_(5)semiconductors with abundant charge separation sites to reinforce electric dipole ***,the three-dimensional reconstruction of the absorber using microcomputer tomography technology provides insight into the intensification of the unique lamellar morphology regarding multiple reflection and scattering dissipation ***,ov-Nb_(2)O_(5)/CNS demonstrates excellent application potential by curing into a microwave-absorbing,machinable,and heat-dissipating *** work provides insight into the dielectric polarization loss mechanisms of nano-semiconductor/carbon composites and inspires the design of high-performance microwave absorption materials.

关键词： Electromagnetic wave absorption Nb_(2)O_(5)semiconductor Dielectric polarization loss Oxygen vacancy Nb_(2)O_(5)-carbon hetero-interface

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Vertically ordered silica mesochannels as preconcentration materials for the electrochemical detection of methylene blue

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Science China Chemistry 2015年第10期58卷 1593-1599页

作者： yayun He Longhua Ding Bin Su Institute of Microanalytical Systems Department of Chemistry Zhejiang University (Zijin’gang Campus)

Silica mesochannels(SMCs) vertically and regularly oriented to the surface of indium tin oxide(ITO) electrodes were prepared and utilized for preconcentration and detection of methylene blue(MB) in aqueous solution. The positively charged MB can be adsorbed to the SMCs by following the pseudo-first-order kinetic model. The negative value of ?G=?34.73 k J/mol derived from the Langmuir adsorption isotherm indicated the thermodynamic feasibility of the adsorption and the spontaneous nature of the process. Moreover, the adsorbed MB can undergo an electrochemical reaction on the ITO electrode at a suitable potential and the resulting electrical current can be utilized to quantify the MB in aqueous solution. A good analytical performance for MB with a linear range from 10 nmol/L to 1.0 ?mol/L and a detection limit at the nmol/L level was obtained. We believe that such a platform consisting of SMCs perpendicularly tethered to the underlying electrode surface simultaneously allows enrichment and electrochemical detection and can be extended for the detection of various charged dyes, as well as many other charged species.

关键词： methylene blue silica mesochannels preconcentration adsorption electrochemical detection

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