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期刊论文 4

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2023 1

2022 2

2003 1

关键词

二维正交方阵码（2D-OOSC） 1

光码分多址（OCDMA） 1

多址干扰MUI 1

智能；简约；自洽；编码率减少；深度网络；闭环转录 1

误码率（BER） 1

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OCDMA系统二维2D-OOSC方阵码的参数优化和性能分析

李传起,孙小菡,张明德,丁东

《中国工程科学》 2003年 第5卷 第4期   页码 50-54

摘要： 详细分析了2D-OOSC系统的用户容量以及由多用户干扰引起的误码性能。

关键词： 光码分多址（OCDMA）     二维正交方阵码（2D-OOSC）     多址干扰MUI     误码率（BER）    

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Carbon-coated Ni-Co alloy catalysts: preparation and performance for aqueous phase hydrodeoxygenation of methyl palmitate to hydrocarbons using methanol as the hydrogen donor

《化学科学与工程前沿（英文）》 2022年 第16卷 第3期   页码 443-460 doi: 10.1007/s11705-021-2079-1

摘要： Carbon-coated Ni, Co and Ni-Co alloy catalysts were prepared by the carbonization of the metal doped resorcinol-formaldehyde resins synthesized by the one-pot extended Stöber method. It was found that the introduction of Co remarkably reduced the carbon microsphere size. The metallic Ni, Co, and Ni-Co alloy particles (mainly 10–12 nm) were uniformly distributed in carbon microspheres. A charge transfer from Ni to Co appeared in the Ni-Co alloy. Compared with those of metallic Ni and Co, the d-band center of the Ni-Co alloy shifted away from and toward the Fermi level, respectively. In the in-situ aqueous phase hydrodeoxygenation of methyl palmitate with methanol as the hydrogen donor at 330 °C, the decarbonylation/decarboxylation pathway dominated on all catalysts. The Ni-Co@C catalysts gave higher activity than the Ni@C and Co@C catalysts, and the yields of n-pentadecane and n-C6–n-C16 reached 71.6% and 92.6%, respectively. The excellent performance of Ni-Co@C is attributed to the electronic interactions between Ni and Co and the small carbon microspheres. Due to the confinement effect of carbon, the metal particles showed high resistance to sintering under harsh hydrothermal conditions. Catalyst deactivation is due to the carbonaceous deposition, and the regeneration with CO2 recovered the catalyst reactivity.

关键词： Stöber method     carbon-coated Ni-Co alloy     in-situ hydrodeoxygenation     methyl palmitate     decarbonylation/decarboxylation    

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Efficient hydrothermal deoxygenation of methyl palmitate to diesel-like hydrocarbons on carbon encapsulated Ni–Sn intermetallic compounds with methanol as hydrogen donor

《化学科学与工程前沿（英文）》 2023年 第17卷 第2期   页码 139-155 doi: 10.1007/s11705-022-2217-4

摘要： Porous carbon-encapsulated Ni and Ni–Sn intermetallic compound catalysts were prepared by the one-pot extended Stöber method followed by carbonization and tested for in-situ hydrothermal deoxygenation of methyl palmitate with methanol as the hydrogen donor. During the catalyst preparation, Sn doping reduces the size of carbon spheres, and the formation of Ni–Sn intermetallic compounds restrain the graphitization, contributing to larger pore volume and pore diameter. Consequently, a more facile mass transfer occurs in carbon-encapsulated Ni–Sn intermetallic compound catalysts than in carbon-encapsulated Ni catalysts. During the in-situ hydrothermal deoxygenation, the synergism between Ni and Sn favors palmitic acid hydrogenation to a highly reactive hexadecanal that easily either decarbonylate to n-pentadecane or is hydrogenated to hexadecanol. At high reaction temperature, hexadecanol undergoes dehydrogenation–decarbonylation, generating n-pentadecane. Also, the C–C bond hydrolysis and methanation are suppressed on Ni–Sn intermetallic compounds, favorable for increasing the carbon yield and reducing the H2 consumption. The n-pentadecane and n-hexadecane yields reached 88.1% and 92.8% on carbon-encapsulated Ni3Sn2 intermetallic compound at 330 °C. After washing and H2 reduction, the carbon-encapsulated Ni3Sn2 intermetallic compound remains stable during three recycling cycles. This is ascribed to the carbon confinement that effectively suppresses the sintering and loss of metal particles under harsh hydrothermal conditions.

关键词： extended Stöber method     carbon encapsulated Ni–Sn intermetallic compounds     confinement     in-situ hydrothermal deoxygenation     hydrogenation     decarbonylation    

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论智能起源中的简约与自洽原则 Position Paper

马毅1,曹颖2,沈向洋3

《信息与电子工程前沿（英文）》 2022年 第23卷 第9期   页码 1298-1323 doi: 10.1631/FITEE.2200297

摘要： 深度学习重振人工智能十年后的今天，我们提出一个理论框架来帮助理解深度神经网络在整个智能系统里面扮演的角色。我们引入两个基本原则：简约与自洽；分别解释智能系统要学习什么以及如何学习。我们认为这两个原则是人工智能和自然智能之所以产生和发展的基石。虽然这两个原则的雏形早已出现在前人的经典工作里，但是我们对这些原则的重新表述使得它们变得可以精准度量与计算。确切地说，简约与自洽这两个原则能自然地演绎出一个高效计算框架：压缩闭环转录。这个框架统一并解释了现代深度神经网络以及众多人工智能实践的演变和进化。尽管本文主要用视觉数据建模作为例子，我们相信这两个原则将会有助于统一对各种自动智能系统的理解，并且提供一个帮助理解大脑工作机理的框架。

关键词： 智能；简约；自洽；编码率减少；深度网络；闭环转录    

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标题 作者 时间 类型 操作

OCDMA系统二维2D-OOSC方阵码的参数优化和性能分析

李传起,孙小菡,张明德,丁东

期刊论文

Carbon-coated Ni-Co alloy catalysts: preparation and performance for aqueous phase hydrodeoxygenation of methyl palmitate to hydrocarbons using methanol as the hydrogen donor

期刊论文

Efficient hydrothermal deoxygenation of methyl palmitate to diesel-like hydrocarbons on carbon encapsulated Ni–Sn intermetallic compounds with methanol as hydrogen donor

期刊论文

论智能起源中的简约与自洽原则

马毅1,曹颖2,沈向洋3

期刊论文