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CaH2-promoted activity of Ni-carbonate interface for CO2 methanation

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Journal of Energy Chemistry 2025年第01期 522-532页

作者： Jin-Peng Wang Guo-Cui Mao hui-lin Jiang Bao-Xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in Ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for Ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO3（31.6%） and Ni/CaH2-CaO （42.4%） ***,the Ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified Ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the Ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

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Dexmedetomidine Promotes Angiogenesis and Vasculogenic Mimicry in Human Hepatocellular Carcinoma through α^(2)-AR/HIF-1α/VEGFA Pathway

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Biomedical and Environmental Sciences 2022年第10期35卷 931-942页

作者： FANG Tao lin Li ye Zhi Jian FANG Lian SHI Shuai YU Ke Da MIAO hui hui LI Tian Zuo Department of Anesthesiology Beijing Shijitan HospitalCapital Medical UniversityBeijing 100038China Department of Anesthesiology The Affiliated Jinhua Hospital of Wenzhou Medical UniversityJinhua 321000ZhejiangChina IVF centre The Affiliated Jinhua Hospital of Wenzhou Medical UniversityJinhua 321000ZhejiangChina

Objective Dexmedetomidine(DEX),the most specificα^(2)-adrenergic receptor agonist widely used for its sedative and analgesic properties,has been reported to upregulate HIF-1αexpression to protect hypoxic and ischemic ***,it is largely unclear whether DEX can also upregulate Hypoxiainducible factor-1 alpha(HIF-1α)expression and its downstream vascular endothelial growth factor-A(VEGFA)in cancer tissues with oxygen-deficient tumor *** We used SMMC-7721 cells,MHCC97-H cells,and a mouse model of orthotopic hepatic carcinoma to explore the effect of DEX on angiogenesis and vasculogenic mimicry(VM)and its *** normoxic(20%O^(2))and hypoxic(1%O^(2))conditions,DEX was used to intervene cells,and yohimbine was used to rescue *** The results showed that DEX promoted angiogenesis and VM in human liver cancer cells within a certain dose range,and the addition of yohimbine inhibited this *** could activate HIF-1α/VEGFA pathway,which was further verified by silencing HIF-1α.Consistently,in vivo results also showed that DEX can up-regulate HIF-1α/VEGFA expression,and enhance the number of VM channels and microvessel density(MVD).Conclusion We believe that HIF-1α/VEGFA might be an important signaling pathway by which DEX promotes angiogenesis and VM formation in human hepatocellular carcinoma,whereasα^(2)-adrenergic receptor mediation might be the critical mechanisms.

关键词： Hepatocellular carcinoma Dexmedetomidine Yohimbine α^(2)-adrenergic receptor HIF-1a VEGFA Vascular mimicry Angiogenesis

Evolution of Microstructure and Ordering in Rolling Process of Fe-6. 5 mass% Si Alloy

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Journal of Iron and Steel Research International 2016年第5期23卷 453-458页

作者： hui LI Yong-feng LIANG Feng ye State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing

Fe-6. 5 mass% Si alloy is an excellent soft magnetic material with good application prospects. After rolling,the structure of the sheet is likely to be heterogeneous along the normal direction. The microstructure and ordering evolution in the thickness range of the sheets during hot-warm rolling process was studied by means of optical microscope and transmission electron microscope. The results show that dynamic recrystallization occurs in the surface parts during the hot and warm rolling processes,where the grains are equiaxed but have high density of dislocations due to the large deformation. The grains in the center part are elongated along the rolling direction. It is also found that in the hot rolled sheet,the center part has lower density of dislocations because of dynamic recovery. Meanwhile,this part has higher ordering content compared with the surface part,indicating that the high density of dislocations can inhibit the formation of ordering in the air cooling process after hot rolling. In the warm rolling process,both of the parts are deformed heavily. Large deformation destroys ordered phases and induces disordering. The ordering content is low in the whole warm rolled sheet.

关键词： rolling process microstructure ordering Fe-6.5 mass% Si alloy

Parallel processing architecture of H.264 adaptive deblocking filters

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第8期10卷 1160-1168页

作者： Hu WEI Tao lin Zheng-hui lin Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China

In H.264,computational complexity and memory access of deblocking filters are variable,dependent on video *** paper proposes a VLSI architecture of deblocking filters with adaptive dynamic power,which avoids redundant computations and memory accesses by precluding the blocks that can be *** vertical and horizontal edges are simulta-neously processed in an advanced scan order to speed up the *** a result,dynamic power of the proposed architecture can be reduced adaptively(up to about 89%) for different videos,and the off-chip memory access is improved when compared to previous ***,the processing capability of the proposed architecture is in particular appropriate for real-time deblocking of high-definition television(HDTV,1920×1080 pixels/frame,60 frames/s video signals) video operation at 62 *** the proposed architecture,power can be reduced by up to about 89% and processing time by from 25% to 81% compared with previous designs.

关键词： Deblocking filter Adaptive dynamic power Parallel processing Pipeline H.264

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阶梯式包埋板在肾活检电镜标本制备中的应用

电子显微学报 2023年第3期42卷 365-368页

作者：侯晓涛王伶钟学军朱伟城陈观庆陈启晴欧洁云李福华谢琳李依晨叶慧琳毕振海杨惠霏官阳沈婉君广州金域医学检验中心广东广州510000 暨南大学附属复大肿瘤医院广东广州510000 武汉大学人民医院超微病理中心湖北武汉430060 解放军总医院第一医学中心肾脏病医学部北京100853

本文介绍了一款新型的阶梯式电镜标本包埋板,此包埋板具有独特的阶梯式设计,如应用于肾活检电镜标本的制备,较传统方法能节省环氧树脂和修块刀片的消耗量,且节约了修块、定位和半薄切片所需的时间。此包埋板成本低,操作简便,是高效的电... 详细信息

本文介绍了一款新型的阶梯式电镜标本包埋板,此包埋板具有独特的阶梯式设计,如应用于肾活检电镜标本的制备,较传统方法能节省环氧树脂和修块刀片的消耗量,且节约了修块、定位和半薄切片所需的时间。此包埋板成本低,操作简便,是高效的电镜标本包埋工具,为肾活检病理诊断提供有力支撑。此包埋板同样适用于其它组织、器官临床穿刺类标本和科研生物电镜标本的包埋。

关键词：阶梯式包埋板包埋板肾活检电镜标本

Carbon nanotubes-Nafion composites as Pt-Ru catalyst support for methanol electro-oxidation in acid media

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Journal of Natural Gas Chemistry 2009年第2期18卷 199-204页

作者： Shengzhou Chen Fei ye Weiming lin School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 Guangdong China School of Chemical and Energy Engineering South China University of Technology Guangzhou 510640 Guangdong China

Carbon nanotubes-Nafion （CNTs-Nation） composites were prepared by impregnated CNTs with Nation in ethanol solution and characterized by FT-IR. Pt-Ru catalysts supported on CNTs-Nafion composites were synthesized by microwave-assisted polyol process. The physical and electrochemical properties of the catalysts were characterized by X-ray diffraction （XRD）, transmission electron microscope （TEM）, CO stripping voltammetry, cyclic voltammetry （CV） and chronoamperometry （CA）. The results showed that the Nation incorporation in CNTs-Nation composites did not significantly alter the oxygen-containing groups on the CNTs surface. The Pt-Ru catalyst supported on CNTs-Nafion composites with 2 wt% Naton showed good dispersion and the best CO oxidation and methanol electro-oxidation activities.

关键词： carbon nanotubes-Nafion composites Pt-Ru catalysts methanol electro-oxidation

Functional magnetic nanoparticles for facile viable but nonculturable bacteria separation and purification

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Frontiers of Environmental Science & Engineering 2016年第6期10卷 123-128页

作者： Chunming Wang huirong lin Chengsong ye Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China

Viable But Nonculturable （VBNC） Bacteria, which represent a unique population of microorganisms in drinking water systems, have become a potential threat to human health. Current studies on VBNC ceils usually fail to obtain pure VBNC state bacteria, which may lead to inaccurate results. We therefore introduce a novel method of VBNC cell separation and puriticatlon in this paper. PAH-coated magnetic nanoparticles （MNPs） were synthesized and found to be capable of capturing and releasing bacterial cells with high efficiency. With the aid of an additional incubation step, VBNC cells were easily isolated and purified from normal bacteria using functional MNPs. Our method represents a new technique that can be utilized in studies of VBNCs.

关键词： Drinking water biosafety VBNC Nanoparticles Magnetic separation and purification

Priority probability deceleration deadline-aware TCP

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Journal of Systems Engineering and Electronics 2015年第3期26卷 595-602页

作者： Jin ye Jing lin Jiawei Huang School of Computer and Electronic Information Guangxi University Guangxi Experiment Center of Information School of Information and Communication Guilin University of Electronic Technology School of Information Science and Engineering Central South University

In modern data centers, because of the deadline- agnostic congestion control in transmission control protocol （TCP）, many deadline-sensitive flows can not finish before their deadlines. Therefore, providing a higher deadline meeting ratio becomes a critical challenge in the typical online data intensive （OLDI） ap- plications of data center networks （DCNs）. However, a problem named as priority synchronization is found in this paper, which de- creases the deadline meeting ratio badly. To solve this problem, we propose a priority probability deceleration （P2D） deadline-aware TCP. By using the novel probabilistic deceleration, p2D prevents the priority synchronization problem. Simulation results show that P2D increases the deadline meeting ratio by 20% compared with D2TCP.

关键词： data center networks (DCNs) deadline priority synchronization transport control protocol (TCP).

Triple-Helix Structured Model Based on Problem-Knowledge-Solution Co-evolution for Innovative Product Design Process

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Chinese Journal of Mechanical Engineering 2020年第6期33卷 49-63页

作者： Qian hui Yan Li ye Tao Hongwei Liu Innovation Method and Creative Design Key Laboratory of Sichuan Province Chengdu610065China School of Mechanical Engineering Sichuan UniversityChengdu610065China

A design problem with deficient information is generally described as wicked or *** information insufficiency leaves designers with loose settings,free environments,and a lack of strict boundaries,which provides them with more opportunities to facilitate ***,to capture the opportunity behind the uncertainty of a design problem,this study models an innovative design as a composite solving process,where the problem is clarified and resolved from fuzziness to satisfying solutions by interplay among design problems,knowledge,and ***,a triple-helix structured model for the innovative product design process is proposed based on the co-evolution of the problem,solution,and knowledge spaces,to provide designers with a distinct design strategy and method for innovative *** three spaces interact and co-evolve through iterative mappings,including problem structuring,knowledge expansion,and solution *** mappings carry the information processing and decision-making activities of the design,and create the path to satisfying ***,a case study of a reactor coolant flow distribution device is presented to demonstrate the practicability of this model and the method for innovative product design.

关键词： Innovative design Problem-knowledge-solution co-evolution Design activity Design process Product design