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Efficient Synthesis of Optically Active Alcohols

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复旦学报（自然科学版） 2005年第5期44卷 672-673页

作者： J.S. chen Z.R. Dong y.y. Li B.Z. Li y. Xing W.y. Shen g. chen X.Q. Zhang J.X. gao State Key Laboratory of Physical Chemistry of Solid Surfaces Deparment of ChemistryXiamen University Xiamen 361005 China

Optically active secondary alcohols are versatile building blocks for synthesis of unnatural biological active compounds and functional materials. Therefore, study on efficient synthesis of optically active alcohols is becoming an important subject in synthetic organic chemistry. Catalytic asymmetric reduction of carbonyl compounds is a practical method to create chiral alcohols. For the past decades, a large number of catalytic methods have been developed to achieve this goal.

关键词：配合基酒精乙醇生物学接触反应

SIMULATION OF THE MICROSTRUCTURE DISTRIBUTION OF HyDROgEN STORAgE ALLOy AND OPTIMAL DESIgN OF CASTINg MOULDS

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 770-775页

作者： Q.A. Li, H.Q. Mo, y.Z. Huo, g. Sang, y.F. chen, M.g. Han, y.g. chen and M.J. Tu Department of Metal Materials, Sichuan University, chengdu 610065, China

In this paper,a simulation model for the temperature field in the solidification process and microstructure distribution is presented. Then, the result of simulation for the final microstructure distribution is compared with experiment using 10-Kg ingot of MlNi3.55Al0.3Mn0.4CO0.75 (Ml: Lanthanum-rich Mischmetal) hydrogen stor- age alloy cast in a mould, which agrees with the experiment well. Finally, in order to obtain the expected as-cast microstructure distribution of 15-Kg ingot of MlNi3.55Al0.3Mn0.4Co0.75 alloy, the size of Cu mould is optimized using the model described. The optimized mould is then made and the alloy is cast in it, the expected as-cast microstructure distribution is obtained.

关键词： hydrogen storage alloy microstructure simulation casting

An Analytical Approach for Assessing the Collapse Strength of an Unbonded Flexible Pipe

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Journal of Marine Science and Application 2015年第2期14卷 196-201页

作者： y. g. chen J. Liu L. F. Zhu Z. M. Tan g. Karabelas gE Oil & gas Newcastle Upon Tyne UK gE Oil & gas Houston TX USA

This paper presents an analytical scheme for predicting the collapse strength of a flexible pipe, which considers the structural interaction between relevant layers. The analytical results were compared with a FEA model and a number of test data, and showed reasonably good agreement. The theoretical analysis showed that the pressure armor layer enhanced the strength of the carcass against buckling, though the barrier weakened this effect. The collapse strength of pipe was influenced by many factors such as the inner radius of the pipe, the thickness of the layers and the mechanical properties of the materials. For example, an increase in the thickness of the barrier will increase contact pressure and in turn reduce the critical pressure.

关键词： collapse strength prediction unbonded flexible pipes finite element simulations rough bore elastic collapse criticalpressure

A NEW OFFSET APPROACH FOR CURVES ON TRIANgLE MESH SURFACES

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A NEW OFFSET APPROACH FOR CURVES ON TRIANGLE MESH SURFACES

Band structure and photocatalytic activities for H2 production of ABi2Nb2O9(A=Ca,Sr,Ba)

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： Z.M. chen, y.g. chen, F.J. Liang College of Computer Science and Information Engineering, HoHai University, ChangZhou, 213022, China

Offset for curves on surfaces is an essential tool in generating the composite ply shapes for the design of laminated composite parts. For the triangle mesh is widely used in industry and computer gra

关键词： Offset curves invalid-loops triangle meshes.

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Band structure and photocatalytic activities for H2 producti...

Converge聚合:年轻、创意、梦想和无限激情

第九届全国氢能学术会议

作者： y.X.Li,g chen,H.J.Zhang,Z.S Lv Harbin Institute of Technology,China

Layered metal oxides have been demonstrated to be highly active photocatalysts under light *** was explained that these layered materials use their interlayer space as reaction sites,where electron-hole recombination process could be retarded by physical separation of electron and hole pairs generated by *** this paper,a new series of layered perovskite photocatalysts,ABiNbO(A=Ca,Sr,Ba),were synthesized by the

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中国广告 2018年第5期 54-57页

作者：张得欣 Adam g.y.chen 吴睿徐启恒锐客广告 Wynd公司劲乐集团

因为不同力量的聚合,这个行业才会充满创意,不停地向前走。道生一,一生二,二生三,三生万物。追根溯源万物相融共生,在互联网时代,我们重新找回万物互联互通和谐共生的感觉,只要找到一个巧妙的连接点,就仿佛触动了阿拉丁神灯,总有意想不... 详细信息

因为不同力量的聚合,这个行业才会充满创意,不停地向前走。道生一,一生二,二生三,三生万物。追根溯源万物相融共生,在互联网时代,我们重新找回万物互联互通和谐共生的感觉,只要找到一个巧妙的连接点,就仿佛触动了阿拉丁神灯,总有意想不到的惊喜在等着你。机遇就在那里,等着有想法的人去发现。广告人去做产品,做产品的人又开始做广告,做平台的也开始做广告……在这个过程当中,很多企业找到了自己的核心竞争力,找到了自己的立场。很多看不见的变化都在滋生,在成长,大家都在变,你中有我,我中有你。

关键词：聚合创意激情梦想三生万物和谐共生互联网时代核心竞争力

Toward understanding the role of genomic repeat elements in neurodegenerative diseases

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Neural Regeneration Research 2025年第3期20卷 646-659页

作者： Zhengyu An Aidi Jiang Jingqi chen Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina MOE Frontiers Center for Brain Science Fudan UniversityShanghaiChina MOE Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence Fudan UniversityShanghaiChina Zhangjiang Fudan International Innovation Center ShanghaiChina

Neurodegenerative diseases cause great medical and economic burdens for both patients and society;however, the complex molecular mechanisms thereof are not yet well understood. With the development of high-coverage sequencing technology, researchers have started to notice that genomic repeat regions, previously neglected in search of disease culprits, are active contributors to multiple neurodegenerative diseases. In this review, we describe the association between repeat element variants and multiple degenerative diseases through genome-wide association studies and targeted sequencing. We discuss the identification of disease-relevant repeat element variants, further powered by the advancement of long-read sequencing technologies and their related tools, and summarize recent findings in the molecular mechanisms of repeat element variants in brain degeneration, such as those causing transcriptional silencing or RNA-mediated gain of toxic function. Furthermore, we describe how in silico predictions using innovative computational models, such as deep learning language models, could enhance and accelerate our understanding of the functional impact of repeat element variants. Finally, we discuss future directions to advance current findings for a better understanding of neurodegenerative diseases and the clinical applications of genomic repeat elements.

关键词： Alzheimer's disease ataxia deep learning long-read sequencing neurodegeneration neurodegenerative diseases Parkinson's disease repeat element structural variant

Fabrication and Mechano-sensing Characteristics of Bending Polypyrrole Actuator

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 240-245页

作者： chen Jinyou HU Wei School of Automotive Engineering Hunan Financial&Industrial Vocational-technical CollegeHengyang 421002China College of Mechanical and Electrical Engineering Hunan Agricultural UniversityChangsha 410128China

To prepare a conductive polymer actuator with decent performance,a self-built experimental platform for the preparation of polypyrrole film is *** of the essential goals is to examine the mechanical characteristics of the actuator in the presence of various combinations of process parameters,combined with the orthogonal test method of"four factors and three levels".The bending and sensing characteristics of actuators of various sizes are methodically examined using a self-made bending polypyrrole *** functional relationship between the bending displacement and the output voltage signal is established by studying the characteristics of the actuator sensor subjected to various degrees of *** experimental results reveal that the bending displacement of the actuator tip almost exhibits a linear variation as a function of length and *** the voltage reaches 0.8 V,the bending speed of the actuator tends to be ***,the mechanical properties of the self-assembled polypyrrole actuator are verified by the design and fabrication of the microgripper.

关键词： conductive polymer polypyrrole mechanical characteristics actuators sensing characteristics

Analysis of Micromechanical Properties at the Interface of Pre-wet SBS Modified Asphalt Mixture Based on Molecular Simulation Technology

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 103-113页

作者： chen Wuxing chen Shuang yU yan ZHANg Jiangyi XU Haiyang gUO Wei School of Mines China University of Mining and TechnologyXuzhou 221000China College of Construction Engineering Jilin Uni-versityChangchun 130026China

The pre-wetting of aggregate surface is a means to improve the interface performance of SBS modified asphalt and *** effect of pre-wetting technology on the interaction between SBS modified asphalt and aggregate was analyzed by molecular dynamics *** diffusion coefficient and concentration distribution of SBS modified asphalt on aggregate surface are *** simulation results show that the diffusion coefficient of the aggregate surface of SBS modified asphalt is increased by 47.6%and 70.5%respectively after 110#asphalt and 130#asphalt are *** concentration distribution of SBS modified asphalt on the aggregate surface after pre-wetting is more *** to the results of interface energy calculation,the interface energy of SBS modified bitumen and aggregate can be increased by about 5%after *** to the results of molecular dynamics simulation,the pre-wetting technology can effectively improve the interface workability of SBS modified bitumen and aggregate,so as to improve the interface performance.

关键词： pre-wet oil-stone interface interface interaction interface mechanics molecular dynamics simulation