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1,3-Dicarbonyl compounds as phosphine-free ligands for Pd-catalyzed Heck and Suzuki reactions

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Chinese Chemical Letters 2007年第6期18卷 625-628页

作者： xin cui Juan Li Lei Liu Qing Xiang Guo Department of Chemistry University of Science and Technology of China Hefei 230026 China

Some 1,3-dicarbonyl compounds (such as pentane-2,4-dione and 3-oxo-N-phenylbutanamide) were found to constitute highly efficient, yet low-priced and phosphine-free ligands for the Pd-catalyzed Heck and Suzuki reaction... 详细信息

关键词： Palladium catalyst Suzuki reaction Heck reaction Phosphine-free ligand

MET receptor tyrosine kinase promotes the generation of functional synapses in adult cortical circuits

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Neural Regeneration Research 2025年第5期20卷 1431-1444页

作者： Yuehua cui Xiaokuang Ma Jing Wei Chang Chen Neha Shakir Hitesch Guirram Zhiyu Dai Trent Anderson Deveroux Ferguson Shenfeng Qiu Basic Medical Sciences University of Arizona College of Medicine-PhoenixPhoenixAZUSA Department of Medicine University of Arizona College of Medicine-PhoenixPhoenixAZUSA

Loss of synapse and functional connectivity in brain circuits is associated with aging and neurodegeneration,however,few molecular mechanisms are known to intrinsically promote synaptogenesis or enhance synapse *** have previously shown that MET receptor tyrosine kinase in the developing cortical circuits promotes dendritic growth and dendritic spine *** investigate whether enhancing MET in adult cortex has synapse regenerating potential,we created a knockin mouse line,in which the human MET gene expression and signaling can be turned on in adult(10–12 months)cortical neurons through doxycycline-containing *** found that similar to the developing brain,turning on MET signaling in the adult cortex activates small GTPases and increases spine density in prefrontal projection *** findings are further corroborated by increased synaptic activity and transient generation of immature silent *** MET signaling resulted in an increasedα-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid/N-methyl-Daspartate(AMPA/NMDA)receptor current ratio,indicative of enhanced synaptic function and *** data reveal that enhancing MET signaling could be an interventional approach to promote synaptogenesis and preserve functional connectivity in the adult *** findings may have implications for regenerative therapy in aging and neurodegeneration conditions.

关键词： aging circuit connectivity cortical circuits molecular mechanisms neural regeneration neurodegeneration synapses

Mesoporous TS-1 Nanocrystals as Low Cost and High Perfor-mance Catalysts for Epoxidation of Styrene

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Chinese Journal of Chemistry 2017年第5期35卷 577-580页

作者： Tian-Lu cui xin-Hao Li Jie-Sheng Chen School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Mesoporous TS-1 nanocrystals were facilely synthesized without involving additional templates. The usage of inorganic silicon source, less structure-directing agent and high yields of nearly 100% made this template-free strategy suitable for large-scale synthesis with low cost. Furthermore, the as synthesized TS-1 exhibited comparable epoxidation performance than those obtained by other methods.

关键词： TS-1 mesoporous nanocrystal low cost epoxidation

Synthesis,structure and photoluminescence of two porous metal-organoboron frameworks with rtl topology

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Science China Chemistry 2011年第9期54卷 1430-1435页

作者： LIU Yan XU xin XUAN WeiMin ZHU ChengFeng cui Yong State Key Laboratory of Metal Matrix Composites School of Chemistry and Chemical TechnologyShanghai Jiao Tong UniversityShanghai 200240China

Rigid trigonal tris(3-pyridylduryl)borane L was synthesized through four steps in good overall yield from readily available 1,2,4,5-tetramethylbenzene and was used to construct two porous cadmium(II) complexes Cd(L)X2.G(X = Cl,Br;G = guset molecules),1(Cd(L)***.3H2O) and 2(Cd(L)***.C7H8.3H2O),under mild reaction conditions.1 and 2 are isostructural and featured with 3D porous metal-organoboron framewoks with rtl topology,in which L acts as a 3-connected node while a dicadmium motif serves as 6-connected *** addition,1 and 2 exhibit strong photoluminescence in the visible region and 1 shows moderate adsorption ability of carbon dioxide at 273 K.

关键词： boron metal-organic frameworks coordination polymer photoluminescence

Monocular Depth Estimation with Sharp Boundary

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Computer Modeling in Engineering & Sciences 2023年第7期136卷 573-592页

作者： xin Yang Qingling Chang Shiting Xu xinlin Liu Yan cui Faculty of Intelligent Manufacturing Wuyi UniversityJiangmen529000China China-Germany(Jiangmen)Artificial Intelligence Institute Jiangmen529000China Zhuhai 4 DAGE Network Technology Zhuhai519000China

Monocular depth estimation is the basic task in computer *** accuracy has tremendous improvement in the decade with the development of deep ***,the blurry boundary in the depth map is a serious *** find that the blurry boundary is mainly caused by two ***,the low-level features,containing boundary and structure information,may be lost in deep networks during the convolution ***,themodel ignores the errors introduced by the boundary area due to the few portions of the boundary area in the whole area,during the *** on the factors mentioned *** countermeasures are proposed to mitigate the boundary blur ***,we design a scene understanding module and scale transformmodule to build a lightweight fuse feature pyramid,which can deal with low-level feature loss ***,we propose a boundary-aware depth loss function to pay attention to the effects of the boundary’s depth *** experiments show that our method can predict the depth maps with clearer boundaries,and the performance of the depth accuracy based on NYU-Depth V2,SUN RGB-D,and iBims-1 are competitive.

关键词： Monocular depth estimation object boundary blurry boundary scene global information feature fusion scale transform boundary aware

Super-resolution processing of passive millimeter-wave images based on conjugate-gradient algorithm

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Journal of Systems Engineering and Electronics 2009年第4期20卷 762-767页

作者： Li Liangchao Yang Jianyu cui Guolong Wu Junjie Jiang Zhengmao Zheng xin School of Electronic Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China

This paper designs a 3 mm radiometer and validate with experiments based on the principle of passive millimeter wave （PMMW） imaging. The poor spatial resolution, which is limited by antenna size, should be improved by post data processing. A conjugate-gradient （CG） algorithm is adopted to circumvent this drawback. Simulation and real data collected in laboratory environment are given, and the results show that the CG algorithm improves the spatial resolution and convergent rate. Further, it can reduce the ringing effects which are caused by regularizing the image restoration. Thus, the CG algorithm is easily implemented for PMMW imaging.

关键词： passive millimeter wave imaging super-resolution conjugate-gradient spectral extrapolation.

Augmented Lagrangian Methods for Convex Matrix Optimization Problems

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Journal of the Operations Research Society of China 2022年第2期10卷 305-342页

作者： Ying cui Chao Ding Xu-Dong Li xin-Yuan Zhao Department of Industrial and Systems Engineering University of MinnesotaMinneapolis 55411USA Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Data Science Fudan UniversityShanghai 200433China Shanghai Center for Mathematical Sciences Fudan UniversityShanghai 200433China College of Applied Sciences Beijing University of TechnologyBeijing 100124China

In this paper,we provide some gentle introductions to the recent advance in augmented Lagrangian methods for solving large-scale convex matrix optimization problems(cMOP).Specifically,we reviewed two types of sufficient conditions for ensuring the quadratic growth conditions of a class of constrained convex matrix optimization problems regularized by nonsmooth spectral *** a mild quadratic growth condition on the dual of cMOP,we further discussed the R-superlinear convergence of the Karush-Kuhn-Tucker(KKT)residuals of the sequence generated by the augmented Lagrangian methods(ALM)for solving convex matrix optimization *** details of the ALM for solving core convex matrix optimization problems are also provided.

关键词： Matrix optimization Spectral functions Quadratic growth conditions Metric subregularity Augmented Lagrangian methods Fast convergence rates Semismooth Newton methods

Mechanisms,monitoring and modeling of shrub encroachment into grassland:a review

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International Journal of Digital Earth 2019年第6期12卷 625-641页

作者： xin Cao Yu Liu Xihong cui Jin Chen Xuehong Chen State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijingPeople’s Republic of China Beijing Engineering Research Center for Global Land Remote Sensing Products Institute of Remote Sensing Science and EngineeringFaculty of Geographical ScienceBeijing Normal UniversityBeijingPeople’s Republic of China

Shrub encroachment into arid and semi-arid grasslands has elicited extensive research attention worldwide under the background of climate change and increasing anthropogenic *** encroachment may considerably impact local ecosystems and economies,including the conversion of the structure and function of ecosystems,the shift in ambient conditions,and the weakness of local stock farming *** article reviews recent research progresses on the shrub encroachment process and mechanism,shrub identification and dynamic monitoring using remote sensing,and modeling and simulation of the shrub encroachment process and *** studies can help to evaluate the ecological effect of shrub encroachment,and thus,practically manage and recover the ecological environment of degraded ***,the lack of effective measures and data for monitoring shrub encroachment at a large spatial scale severely limits research on the mechanism,modeling,and simulation of shrub encroachment,and the shrub encroachment stages can hardly be quantitatively defined,resulting in insufficient analysis and simulation of shrub encroachment for different spatiotemporal scales and stages *** in remote sensingbased shrub encroachment dynamic monitoring might be crucial for analyzing and understanding the process and mechanism of shrub encroachment,and multi-disciplinary and multi-partnerships are required in the shrub encroachment studies.

关键词： Shrub encroachment arid and semi-arid grassland mechanism dynamic monitoring modeling and simulation

Interacting model of new agegraphic dark energy:observational constraints and age problem

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Science China(Physics,Mechanics & Astronomy) 2011年第8期54卷 1367-1377页

作者： LI YunHe MA JingZhe cui JingLei WANG Zhuo ZHANG xin Department of Physics College of Sciences Northeastern University Shenyang 110004 China Center for High Energy Physics Peking University Beijing 100080 China

Many dark energy models fail to pass the cosmic age test because of the old quasar APM 08279+5255 at redshift z=3.91,the ΛCDMmodel and holographic dark energy models being no *** paper,we focus onthe topic of the age problem inthe new agegraphic dark energy(NADE)*** determine the age of the universe in the NADE model by fitting the observational data,including type Ia supernovae(SNIa),baryon acoustic oscillations(BAO)and the cosmic microwave background(CMB).We find that the NADE model also faces the challenge of the age problem caused by the old quasar APM 08279+*** order to overcome such a difficulty,we consider the possible interaction between dark energy and dark *** show that this quasar can be successfully accommodated in the interacting new agegraphic dark energy(INADE)model at the 2σlevel under the current observational constraints.

关键词： agegraphic dark energy interacting dark energy model observational constrains cosmic age problem