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In Situ Transmission Electron Microscopy and Three-Dimensional Electron Tomography for Catalyst Studies

Chinese Journal of Structural Chemistry 2022年第10期41卷 56-76页

作者： chen Sun kuo Liu Jian Zhang Qian Liu Xijun Liu Lili Han College of Chemistry Fuzhou UniversityFuzhou 350116China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China Institute for Advanced Study Chengdu UniversityChengdu 610106 China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China

An in-depth understanding of the catalytic reaction mechanism is the key to designing efficient and stable catalysts. In situ transmission electron microscope(TEM) is the most powerful tool to visualize and analyze the microstructures of catalysts during catalysis. In situ TEM combined with three-dimensional(3D) electron tomography(ET) reconstruction technique enables interrogations of catalysts’ structural dynamics and chemical changes in high temporal and spatial dimensions. In this review, we discuss and summarize the recent advances in in situ TEM together with 3D ET for catalyst studies. Topics include the latest research progress of in situ TEM imaging as well as 3D visualization and quantitative analysis of catalysts. We also pay particular attention to artificial intelligence(AI)-enhanced smart 3D ET. These include deep learning(DL)-based data compression and storage for the analysis of large TEM data, recovery of wedge-shaped information lost in 3D ET reconstructions, and DL models for reducing residual artifacts in 3D reconstructed images. Finally, the challenges and development prospects of current in situ TEM and 3D ET research are discussed.

关键词： in situ TEM catalyst electron tomography 3D reconstruction artificial intelligence machine learning

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Pressure-induced bimetallic carbon nanotubes from metalorganic frameworks as optimized bifunctional electrocatalysts for water splitting

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Rare Metals 2023年第1期42卷 155-164页

作者： Hong-Xu chen Hui Xu Zhi-Rong Song Yi Liu Hui Cui Jun-kuo Gao Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province Institute of Optoelectronic Materials and DevicesCollage of Optical and Electronic TechnologyChina Jiliang UniversityHangzhou310018China Institute of Functional Porous Materials School of Materials Science and EngineeringZhejiang Sci-Tech UniversityHangzhou310018China Institute for Composites Science Innovation School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Argonne National Laboratory Physics DivisionLemontIL60439USA Department of Chemistry and International Institute for Nanotechnology(IIN) Northwestern UniversityEvanstonIL60208USA

Carbon nanotubes(CNTs)have attracted great interest in numerous applications due to their excellent electronic and structural ***,harsh synthesis conditions and high energy consumption limit the further application of ***,we developed a facile and innovative strategy to generate CNTs by physically pressurizing metal-organic frameworks(MOFs)and then *** synthesized bimetallic nitrogen/sulfur double-doped carbon nanotubes are denoted as Fe_(x)Co_(1-x)P(x=0.5,0.6,0.7,0.8,0.9).The introduction of pressure not only revolutionized the morphology of the electrocatalysts,but also enhanced the activity of oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)in alkaline ***_(0.6)Co_(0.4)-P exhibits superior OER and HER performances in 1.0 mol·L^(-1)KOH solution with overpotentials of 364 and 346 mV at 10 mA·cm^(-2),which are 28 and 5 mV lower than unpressurized Fe0.6Co0.4.

关键词： Metal-organic frameworks(MOFs) Carbon nanotubes(CNTs) Bifunctional Pressurizing Oxygen evolution reaction(OER) Hydrogen evolution reaction(HER)

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Nomogram to predict permanent stoma in rectal cancer patients after sphincter-saving surgery

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World Journal of Gastrointestinal Surgery 2022年第8期14卷 765-777页

作者： Chih-Yu kuo Po-Li Wei Chia-Che chen Yen-Kuang Lin Li-Jen kuo Department of Surgery Taipei Medical University HospitalTaipei 11031Taiwan Division of Colorectal Surgery Department of SurgeryTaipei Medical University HospitalTaipei 11031Taiwan Department of Surgery School of MedicineCollege of MedicineTaipei Medical UniversityTaipei 11031Taiwan Graduate Institute of Athletics and Coaching Science National Taiwan Sport UniversityTaoyuan 33301Taiwan Taipei Cancer Center Taipei Medical UniversityTaipei 11031Taiwan

BACKGROUND Approximately 20 percent of patients with a tumour localized in the low rectum still encounter the possibility of requiring permanent stoma(PS), which can cause drastic changes in lifestyle and physical *** To determine the risk factors for PS and to develop a prediction model to predict the probability of PS in rectal cancer patients after sphincter-saving *** A retrospective cohort of 421 rectal cancer patients who underwent radical surgery at Taipei Medical University Hospital between January 2012 and December 2020 was included in this study. Univariate and multivariate analyses were performed to identify the independent risk factors for PS. A nomogram was developed according to the independent risk factors obtained in the multivariate analysis. The performance of the nomogram was assessed using a receiver operating characteristic curve and a calibration *** The PS rate after sphincter-saving surgery was 15.1%(59/391) in our study after a median follow-up of 47.3 mo(range 7–114 mo). Multivariate logistic regression analysis demonstrated that local recurrence, perirectal abscess, anastomosis site stenosis, perineural invasion, tumor size and operative time were independent risk factors for PS. These identified risk factors were incorporated into the nomogram, and the concordance index of this model was 0.903(95%CI: 0.851-0.955). According to the calibration curves, the nomogram represents a perfect prediction *** Several risk factors for PS after sphincter-saving surgery were identified. Our nomogram exhibited perfect predictive ability and will improve a physician’s ability to communicate the benefits and risks of various treatment options in shared decision making.

关键词： Nomogram Permanent stoma Risk factor Shared decision making Sphincter-saving operation Rectal cancer

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Evaluations of Novel Waveform Coding Signals Based on Finite Projective Plane

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Journal of Electronic Science and Technology 2016年第1期14卷 54-59页

作者： Chien-Hsing Liao Tai-kuo Woo Chi-Chung chen Ing-Jiunn Su the Program of Information Technology Fooyin University the Department of Information Management National Defense University the Department of Electrical and Electronic Engineering National Defense University

The most popular and representative classic waveform codes are referred to as orthogonal,bi-orthogonal,simplex,and etc,but the choice of waveform codes is essentially identical in error performance and cross correlation *** bi-orthogonal coding requires half the bandwidth of the others,such coding scheme is attractive only when large bandwidth is *** this paper,a novel finite projective plane（FPP） based waveform coding scheme is proposed,which is with similar error performance and cross ***,the bandwidth requirement will grow in a quadratic way,but not in an exponential way with the values of message bit numbers（k）.The proposed scheme takes obvious advantages over the bi-orthogonal scheme when k ≥ 6.

关键词： Finite projective plane orthogonal coding simplex coding waveform coding

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Thermodynamic prediction of martensitic transformation temperature in Fe-C-X(X=Ni,Mn,Si,Cr)systems with dilatational coefficient model

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Journal of Materials Science & Technology 2022年第17期112卷 291-300页

作者： Hongcan chen Wei Xu Qun Luo Qian Li Yu Zhang Jingjing Wang kuo-Chih Chou State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China National Engineering Research Center for Magnesium Alloy Chongqing UniversityChongqing 400044China Ansteel Beijing Research Institute Co. LtdBeijing 102211China

Martensitic transformation is significant to strengthen steels,but its thermodynamic prediction is restricted to simple systems due to lacking multicomponent interaction *** driving forces of martensitic transformation can be divided into chemical and non-chemical driving *** magnetic parameters are carefully optimized because it affects the magnetic Gibbs free energy of austenite and ferrite,and have big impact on the chemical driving *** dilatational strain energy provides major contribution to non-chemical driving force,thus the integrated-models for dilatational coefficient are constructed in a wide composition and temperature range based on the experimental dilatational *** expands the scope of application of thermodynamic model and improved prediction accuracy of martensitic transformation temperature(M_(s)).The prediction error reaches 5.6%for Fe-C-X(X=Ni,Mn,Si,Cr)and6.5%for Fe-C-Mn-Si-X(X=Cr,Ni)steels.

关键词： Martensitic transformation Thermodynamics Dilatational strain energy Linear expansion coefficient Fe-C-X(X=Ni,Mn,Si,Cr)system

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ON THE STABILITY OF LAVES PHASES

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中国有色金属学会会刊：英文版 1995年第3期5卷 34-36页

作者： Chonghe, Li deshan, Kang Pei, Qin Nianyi, chen Chinese Acad of Sciences Shanghai China

ＯＮＴＨＥＳＴＡＢＩＬＩＴＹＯＦＬＡＶＥＳＰＨＡＳＥＳ￥Ｌｉ，Ｃｈｏｎｇｈｅ；Ｋａｎｇ，Ｄｅｓｈａｎ；Ｑｉｎ，Ｐｅｉ；Ｃｈｅｎ，Ｎｉａｎｙｉ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｌｕｒｇｙ，Ｃｈｉｎｅｓｅ... 详细信息

ＯＮＴＨＥＳＴＡＢＩＬＩＴＹＯＦＬＡＶＥＳＰＨＡＳＥＳ￥Ｌｉ，Ｃｈｏｎｇｈｅ；Ｋａｎｇ，Ｄｅｓｈａｎ；Ｑｉｎ，Ｐｅｉ；Ｃｈｅｎ，Ｎｉａｎｙｉ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｌｕｒｇｙ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ...

关键词： Laves phases Crystal-type criterion melting behaviour

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镁液气压式定量输送方法研究

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特种铸造及有色合金 2024年第5期44卷 582-586页

作者：周计明耿兆伟廖阔陈宝林李小博齐乐华西北工业大学机电学院西安710072 陕西省纤维增强轻质复合材料重点实验室西安710072

为实现镁液气压式定量输送,设计了水力学模拟试验装置,通过物理模拟试验研究了气体压力、加压时间对水输送量的影响,建立了定量输送的数学模型。根据相似性原理,设计开发了镁液定量输送装置,并确定在气压恒定前提下进行加压时间控制,以... 详细信息

为实现镁液气压式定量输送,设计了水力学模拟试验装置,通过物理模拟试验研究了气体压力、加压时间对水输送量的影响,建立了定量输送的数学模型。根据相似性原理,设计开发了镁液定量输送装置,并确定在气压恒定前提下进行加压时间控制,以实现镁液定量输送。结果表明,基于定时定量法可实现定量输送,输送过程平稳无飞溅,修正后的定量输送预测模型的平均预测误差为1.5%,满足定量输送的要求。

关键词：镁合金定量输送水模拟试验自动化

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3D printing robot:model optimization and image compensation

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控制理论与应用（英文版） 2012年第3期10卷 273-279页

作者： Xinwei chen Jingtai LIU Tao SHI Haili QIAN kuo chen Qing WEI Institute of Robotics and Information Automatic System Nankai UniversityTianjin 300071China

A novel 7-axis robot for industrial large 3D printing applications is presented in this paper, which is developed by Institute of Robotics and Automatic Information System, Nankai University. Base on the prototype, the mechanism on three-dimensional printing is deeply dissected. By investigating the reason of color distortions in 3D printing, a novel multistep compensation algorithm based on model optimization and image compensation is developed. Finally, the experimental results show the performance of the 3D printing robot platform and the proposed algorithms.

关键词： 3D printing robot Model optimization Image compensation

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Tidal Asymmetry Changes in a Shallow Mud Estuary by a Restoration Project

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Journal of Ocean University of China 2019年第2期18卷 339-348页

作者： LIANG Huidi KUANG Cuiping GU Jie MA Yue chen kuo LIU Xu College of Civil Engineering Tongji University College of Marine Ecology and Environment Shanghai Ocean University

The tidal asymmetry-induced siltation below tidal barriers is a worldwide problem that restricts regional socio-economic and environmental development. The hydrodynamic processes of the small mud estuary also feature a high uncertainty after estuary restoration measures. In this study, a hydrodynamic model based on the MIKE21 is used to quantify the responses of tidal asymmetry to a two-phase restoration project in Shuanglong Estuary, Bohai Bay, China. According to the numerical modeling results, the tidal flat removal in the upper estuary(first-phase restoration) induces the flood asymmetry switching to the ebb asymmetry in unrestored reach but enhances flood asymmetry in widening restored reach. Although the tidal asymmetry reverts to flood-dominated pattern after full restoration over the estuary, the imbalance between flood and ebb velocities is relieved. A possible net sediment transport pattern based on a comparison of dominant asymmetric current and actual sediment transport period shows net sediments in the upper estuary and inlet transport seaward and landward, respectively, in the first-phase restoration, whereas landward net sediment transport occurs in the whole estuary under the second-phase restoration scenario. Given these results, we assume that a switch from the flood-dominated estuary to ebb-dominated estuary can be caused by redesigning the cross-sectional profile. The quantitative comparison of Lagrangian residual currents also implies that a channel–shoal structure rather than a flat bathymetry can promote the mass transport. Therefore, reshaping the channel–tidal flat system in restoration projects can prevent the sedimentation of the estuary and improve the water environment.

关键词： tidal asymmetry restoration project mud estuary net sediment transport

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Emergent single-balloon enteroscopy for overt bleeding of small intestinal vascular malformation

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World Journal of Gastroenterology 2018年第1期24卷 157-160页

作者： chen-Shuan Chung Kuan-Chih chen Yueh-Hung Chou kuo-Hsin chen Division of Gastroenterology and Hepatology Department of Internal MedicineFar Eastern Memorial HospitalNew Taipei City 22060Taiwan College of Medicine Fu Jen Catholic UniversityNew Taipei City 24205Taiwan Taiwan Association for the Study of Small Intestinal Diseases(TASSID) Taoyuan City 33305Taiwan Department of Anatomical Pathology Far Eastern Memorial HospitalNew Taipei City 22060Taiwan Department of Surgery Far Eastern Memorial HospitalNew Taipei City 22060Taiwan Department of Electrical Engineering Yuan Ze UniversityNew Taipei City 22060Taiwan

A 28-year-old man presented with anemia symptoms and intermittent tarry stool passage for three days. No stigmata of hemorrhage were identified using esophagogastroduodenoscopy, ileocolonoscopy, and contrast-enhanced computed tomography. He then developed massive tarry stool passage with profound hypovolemic shock and hypoxic respiratory failure. Emergent angiography revealed active bleeder, probably from the jejunal branches of the superior mesenteric artery, but embolization was not performed due to possible subsequent extensive bowel ischemia. His airway was secured via endotracheal intubation with ventilator support, and emergent antegrade singleballoon enteroscopy was performed at 8 h after clinical overt bleeding occurrence; the procedure revealed a 2-cm pulsating subepithelial tumor with a protrudingblood plug at the distal jejunum. Laparoscopic segmental resection of the jejunum with end-to-end anastomosis was performed after emergent endoscopic tattooing localization. Pathological examination revealed a vascular malformation in the submucosa with an organizing thrombus. He was uneventfully discharged 5 d later. This case report highlights the benefit of early deep enteroscopy for the treatment of small intestinal bleeding.

关键词： Early endoscopy Small intestine Deep enteroscopy Device-assisted enteroscopy Obscure gastrointestinal bleeding Vascular malformation

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