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Effect of structure parameters on forces acting on baffles used in gas-solids fluidized beds

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Particuology 2022年第2期20卷 111-119页

作者： Duiping Liu Yongmin Zhang shuhao Zhang Adefarati Oloruntoba Dalian National Laboratory for Clean Energy National Engineering Laboratory for MTODalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

Effects of some important structural parameters,*** pitch,and layout position,on dynamic forces acting on the baffles were examined in the fluidized bed of FCC particles operating under different superficial gas *** experimental baffles were made of multiple inclined *** found that the forces acting on the baffles decreased significantly with reducing pitch between the *** the baffles with a small slat pitch,the forces acting on the baffles increased slightly and then decreased with increasing superficial gas velocity,which is very different from the measured results of a single slat or tube immersed in fluidized *** different results are greatly related to the appearance of the“gas cushion”beneath the baffles,whose height increases with increasing superficial gas *** the other hand,a region with stronger particle circulation induced by the inclined slat array was observed in the *** slat near the wall and located below the region of downward-flowing particles was found to be subjected to the severest ***,the slats located in similar locations of industrial baffles are suggested to be reinforced to increase their structural strength.

关键词： Baffle Experiment Fluidized bed Force Slat

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氨酸钾氧化番红花红T催化光度法测定痕量铁

聊城大学学报（自然科学版） 1994年第2期12卷 63-66页

作者：张爱梅崔慧王术皓付崇岗王怀生张国荣

研究了硫酸介质中，草酸存在下，痕量铁（Ⅲ）催化氯酸钾氧化番红花红Ｔ褪色的新指示反应及动力学条件，建立了动力学直接测定痕量Ｆｅ３＋的方法．方法的灵敏度为３．３×１０－１０Ｆｅ３＋／ｍｌ，测定范围０～０．４μｇ／ｍｌ，操... 详细信息

研究了硫酸介质中，草酸存在下，痕量铁（Ⅲ）催化氯酸钾氧化番红花红Ｔ褪色的新指示反应及动力学条件，建立了动力学直接测定痕量Ｆｅ３＋的方法．方法的灵敏度为３．３×１０－１０Ｆｅ３＋／ｍｌ，测定范围０～０．４μｇ／ｍｌ，操作简便、快速．用于测定人发中的铁，结果满意．

关键词：铁(Ⅲ) 催化光度法番红花红T

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双源CT在TIPS评价中的应用价值

中国中西医结合影像学杂志 2015年第5期13卷 504-507页

作者：王舒皓时惠平张秀兰黄鹤周旭嘉宋宏涛中国人民解放军空军总医院放射科北京100036 中国人民解放军空军总医院核磁共振科北京100036

目的 :探讨双源CT在经颈内静脉肝内门体静脉分流术(transjugular intrahepatic portosystemic stent shunt,TIPS)术前、术后影像学评价中的价值。方法:收集肝硬化门静脉高压患者36例,在TIPS术前及术后复查均行CT增强扫描及三维后处理成... 详细信息

目的 :探讨双源CT在经颈内静脉肝内门体静脉分流术(transjugular intrahepatic portosystemic stent shunt,TIPS)术前、术后影像学评价中的价值。方法:收集肝硬化门静脉高压患者36例,在TIPS术前及术后复查均行CT增强扫描及三维后处理成像。将CT与DSA中门静脉分支、侧支血管及肝内分流道狭窄程度的显示情况进行比较。结果:双源CT和DSA 2种方法对36例肝硬化门静脉高压患者门静脉属支、侧支血管开放情况和支架狭窄程度的判别上分别呈现为较高度一致性、中度一致性、较高度一致性。结论:双源CT可清晰显示门静脉高压患者门静脉属支、侧支血管及肝内分流道狭窄程度,是TIPS影像学评估的重要手段。

关键词：门体分流术,经颈静脉肝内体层摄影术,X线计算机血管造影术肝硬化门静脉高压症

A gate-tunable artificial synapse based on vertically assembled van der Waals ferroelectric heterojunction

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Journal of Materials Science & Technology 2022年第33期128卷 239-244页

作者： Yaning wang Wanying Li Yimeng Guo Xin Huang Zhaoping Luo shuhao Wu Hai wang Jiezhi Chen Xiuyan Li Xuepeng Zhan Hanwen wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Material Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Applied Physics Aalto UniversityAaltoFinland School of Information Science and Engineering(ISE) Shandong UniversityQingdao 266237China

Memtransistor,a multi-terminal device that combines both the characteristics of a memristor and a transistor,has been intensively studied in two-dimensional layered materials(2 DLM),which show potential for applications in such as neuromorphic ***,while often based on the migration of ions or atomic defects in the conduction channels,performances of memtransistors suffer from the poor reliability and ***,those known 2 DLM-based memtransistors are mostly constructed in a lateral manner,which hinders the further increasing of the transistor densities per *** now,fabricating non-atomic-diffusion based memtransistors with vertical structure remains ***,we demonstrate a vertically-integrated ferroelectric memristor by hetero-integrating the 2 D ferroelectric materials CuInP_(2)S_(6)(CIPS)into a graphite/CuInP_(2)S_(6)/MoS_(2)vertical *** behaviour and multi-level resistance states were *** synaptic behaviours including excitatory postsynaptic current,paired-pulse-facilitation,and spike-amplitude-dependent plasticity are successfully ***,by applying a gate potential,the memristive behaviour and synaptic features can be effectively gate *** findings pave the way for the realization of novel gate-tunable ferroelectric synaptic devices with the capability to perform complex neural functions.

关键词： van der Waals heterostructures Ferroelectrics Memristor Artificial synapse Neuromorphic computing

不同扫描仪构建的结直肠癌全切片数字病理图像中人工标注迁移的研究

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中华结直肠疾病电子杂志 2020年第5期9卷 475-481页

作者：李江涛郑波潘怡王书浩刘灿城吕宁孙卓邹霜梅国家癌症中心/国家肿瘤临床医学研究中心/中国医学科学院北京协和医学院肿瘤医院病理科北京100021 透彻影像(北京)科技股份有限公司研发部 100102

目的研究结直肠癌人工智能病理诊断模型构建过程中,病理医师对数字切片癌组织的人工标注在不同扫描仪构建的全切片图像(WSI)中准确迁移的方法。方法在本研究中,我们提出了一种基于图像配准的标注迁移方法,在来自不同扫描仪的WSI之间建... 详细信息

目的研究结直肠癌人工智能病理诊断模型构建过程中,病理医师对数字切片癌组织的人工标注在不同扫描仪构建的全切片图像(WSI)中准确迁移的方法。方法在本研究中,我们提出了一种基于图像配准的标注迁移方法,在来自不同扫描仪的WSI之间建立仿射映射。通过多分辨率最小化两个WSI缩略图之间的互信息来估计最佳仿射映射参数,以避免和改变扫描仪特定特性的影响,减少计算时间。我们使用了181张结直肠癌病理切片,使用两个品牌的扫描仪获得相应的WSI,对上述标注迁移方法进行测试。结果 181张HE切片的扫描结果表明,同一张切片由不同扫描仪构建的WSI在颜色、位置、大小等属性上都有不同的表现。使用我们提出的标注迁移方法,其中179张图像的人工标注成功地在不同扫描仪构建的WSI中迁移,其中125对使用单个CPU核心的计算时间不到1分钟。结论我们提出了一种快速、准确的全自动的标注迁移方法,用于在不同扫描仪构建的WSI之间传递人工标注。在准备深度学习训练数据过程中,既可以避免病理医师对新图像的重新标注,也可以避免病理医师之间在标注上的差异。

关键词：结直肠肿瘤标注迁移全切片图像扫描仪病理学深度学习

脂环族环氧与环氧基三甲氧基硅烷混合体系的阳离子光聚合研究

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中国胶粘剂 2021年第9期30卷 1-6,11页

作者：李坚辉王树浩宋彩雨王磊孙明明张斌张绪刚薛刚黑龙江省科学院石油化学研究院黑龙江哈尔滨150040 火箭军装备部驻北京地区第一军事代表室北京100076

以3,4-环氧环己基甲酸-3′,4′-环氧环己基甲酯(CE)为阳离子光聚合环氧树脂,掺杂环氧基三甲氧基硅烷(NQ561)进行紫外光聚合研究。利用红外光谱监测辐照过程中可能发生的反应,引发剂PAG-201吸收紫外光分解造成的强酸环境不仅激发环氧开... 详细信息

以3,4-环氧环己基甲酸-3′,4′-环氧环己基甲酯(CE)为阳离子光聚合环氧树脂,掺杂环氧基三甲氧基硅烷(NQ561)进行紫外光聚合研究。利用红外光谱监测辐照过程中可能发生的反应,引发剂PAG-201吸收紫外光分解造成的强酸环境不仅激发环氧开环聚合,同时促进NQ561进行水解-缩合反应,形成环氧有机硅互穿网络结构,并对所有混合体系的力学性能进行了研究。研究结果表明:NQ561的加入明显加速了开环聚合反应过程,并提高环氧基最终转化率。对比不同原料配比混合体系的热机械性能发现,随着NQ561含量的增加,光固化样的玻璃化转变温度(Tg)逐渐降低,热膨胀系数(CTE)增大。当m(NQ561)∶m(CE)=20∶80时,其拉伸强度和断裂伸长率达到最大值,同时空气氛围下进行的热重分析显示热稳定性有所提高。

关键词：光聚合环氧水解和缩合硅氧烷

High-performance broadband flexible photodetector based on Gd_(3)Fe_(5)O_(12)-assisted double van der Waals heterojunctions

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Microsystems & Nanoengineering 2023年第4期9卷 157-165页

作者： Ze Zhang Peirui Ji Shaobo Li Fei wang Shengmei He Yiwei Cheng shuhao Zhao Kaili Li Xiaomin wang Yu wang Shuming Yang State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’anShaanxiChina MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi’an Jiaotong UniversityXi’anShaanxiChina

Flexible photodetectors are fundamental components for developing wearable systems,which can be widely used for medical detection,environmental monitoring and flexible ***,compared with 3D materials,lowdimensional materials have degraded performance,a key challenge for current flexible ***,a highperformance broadband photodetector has been proposed and *** combining the high mobility of graphene(Gr)with the strong light–matter interactions of single-walled carbon nanotubes(SWCNTs)and molybdenum disulfide(MoS2),the flexible photodetector exhibits a greatly improved photoresponse covering the visible to near-infrared ***,a thin layer of gadolinium iron garnet(Gd_(3)Fe_(5)O_(12),GdlG)film is introduced to improve the interface of the double van der Waals heterojunctions to reduce the dark *** SWCNT/GdIG/Gr/GdIG/MoS2 flexible photodetector exhibits a high photoresponsivity of 47.375 A/W and a high detectivity of 1.952×1012 Jones at 450 nm,a high photoresponsivity of 109.311 A/W and a high detectivity of 4.504×10^(12) Jones at 1080 nm,and good mechanical stability at room *** work demonstrates the good capacity of GdIGassisted double van der Waals heterojunctions on flexible substrates and provides a new solution for constructing high-performance flexible photodetectors.

关键词： performance double constructing

Polarization-insensitive plasmon nanofocusing with broadband interference modulation for optical nanoimaging

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Nano Research 2023年第7期16卷 9990-9996页

作者： Shaobo Li Fei wang Ze Zhang shuhao Zhao Chengsheng Xia Peirui Ji Xiaomin wang Guofeng Zhang Tao Liu Feng Chen Shuming Yang State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Electronic Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China

Delivering light to the nanoscale using a flexible and easily integrated fiber platform holds potential in various fields of quantum science and ***,rigorous optical alignment,sophisticated fabrication process,and low spatial resolution of the fiber-based nanoconcentrators limit the practical ***,a broadband azimuthal plasmon interference nanofocusing technique on a fiber-coupled spiral tip is demonstrated for fiber-based near-field optical *** spiral plasmonic fiber tip fabricated through a robust and reproducible process can reverse the polarization and modulate the mode field of the surface plasmon polaritons in three-dimensionally azimuthal direction,resulting in polarization-insensitive,broad-bandwidth,and azimuthal interference *** integrating this with a basic scanning near-field optical microscopy,a high optical resolution of 31 nm and beyond is *** high performance and the easy incorporation with various existing measurement platforms offered by this fiber-based nanofocusing technique have great potential in near-field optics,tip-enhanced Raman spectroscopy,nonlinear spectroscopy,and quantum sensing.

关键词： azimuthal asymmetries plasmonic nanoconcentrator fiber-based plasmonic tip near-field scanning optical microscopy

Band gap narrowing of TiO_2 by compensated codoping for enhanced photocatalytic activity

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Journal of Natural Gas Chemistry 2012年第3期21卷 302-307页

作者： Jindou Huang shuhao Wen Jianyong Liu Guozhong He State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChinaa Graduate University of Chinese Academy of Sciences Beijing 100049Chin

In this study, we have performed first-principles screened exchanged hybrid density function theory with the HSE06 function calculations of the C-Mo, C-W, N-Nb and N-Ta codoped anatase TiO2 systems to investigate the effect of codoping on the electronic structure of TiO2. The calculated results demonstrate that （W（s）＋C（s）） codoped TiO2 narrows the band gap significantly, and have little influence on the position of conduction band edges, therefore, enhances the efficiency of the photocatalytic hydrogen generation from water and the photodegradation of organic pollutants. Moreover, the proper oxygen pressure and temperature are two key factors during synthesis which should be carefully under control so that the desired （W（s）＋C（s）） codoped TiO2 can be obtained.

关键词： hybrid DFT TiO2 codoping thermodynamic stability band gap photocatalysts