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人工智能 2

新冠病毒肺炎 2

&alpha 1

N-聚糖模型 1

ACE格式 1

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C-Bézier曲面；降阶；边界约束 1

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Carbon nanotubes-incorporated MIL-88B-Fe as highly efficient Fenton-like catalyst for degradation of

Hang Zhang, Shuo Chen, Haiguang Zhang, Xinfei Fan, Cong Gao, Hongtao Yu, Xie Quan

《环境科学与工程前沿（英文）》 2019年第13卷第2期 doi: 10.1007/s11783-019-1101-z

摘要：

CNTs were incorporated into MIL-88B-Fe to get a new Fenton-like catalyst (C@M).

Fe(II) was introduced in C@M to get a fast initiation of Fenton-like reaction.

Fe(II) content in C@M was related with oxygen-containing functional groups on CNTs.

C@M shows efficient catalytic degradation of pollutants over a wide pH range.

关键词： Heterogeneous Fenton-like catalysts MIL-88B-Fe CNTs Organic pollutants Mechanism

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Catalytic process modeling and sensitivity analysis of alkylation of benzene with ethanol over MIL-101(Fe) and MIL-88(Fe)

Ehsan Rahmani, Mohammad Rahmani

《化学科学与工程前沿（英文）》 2020年第14卷第6期页码 1100-1111 doi: 10.1007/s11705-019-1891-3

摘要： A solvothermal method was used to synthesize MIL-101(Fe) and MIL-88(Fe), which were used for alkylation of benzene. The synthesized catalysts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscope, dynamic light scattering, and BET techniques. Metal-organic frameworks (MOFs) were modeled to investigate the catalytic performance and existence of mass transfer limitations. Calculated effectiveness factors revealed absence of internal and external mass transfer. Sensitivity analysis revealed best operating conditions over MIL-101 at 120°C and 5 bar and over MIL-88 at 142°C and 9 bar.

关键词： MOFs alkylation ethylbenzene catalysts pellet model kinetic model sensitivity analysis

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Fabrication of MIL-100(Fe)@SiO

Yinlong Hu,Shuang Zheng,Fumin Zhang

《化学科学与工程前沿（英文）》 2016年第10卷第4期页码 534-541 doi: 10.1007/s11705-016-1596-9

摘要： Heterogeneous catalysts with convenient recyclability and reusability are vitally important to reduce the cost of catalysts as well as to avoid complex separation and recovery operations. In this regard, magnetic MIL-100(Fe)@SiO @Fe O microspheres with a novel core-shell structure were fabricated by the self-assembly of a metal-organic MIL-100(Fe) framework around pre-synthesized magnetic SiO @Fe O particles under relatively mild and environmentally benign conditions. The catalytic activity of the MIL-100(Fe)@SiO @Fe O catalyst was tested for the liquid-phase acetalization of benzaldehyde and glycol. The MIL-100(Fe)@SiO @Fe O catalyst has a significant amount of accessible Lewis acid sites and therefore exhibited good acetalization catalytic activity. Moreover, due to its superparamagnetism properties, the heterogeneous MIL-100(Fe)@SiO @Fe O catalyst can be easily isolated from the reaction system within a few seconds by simply using an external magnet. The catalyst could then be reused at least eight times without significant loss in catalytic efficiency.

关键词： metal-organic frameworks heterogeneous catalysis magnetically recoverable catalysts core-shell structure acetalization

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利用Nd-Fe-B 油泥回收制备高性能烧结磁体的有效方法 Article

尹小文, 岳明, 路清梅, 刘敏, 王峰, 邱玉冰, 刘卫强, 左铁镛, 查善顺, 李绪亮, 衣晓飞

《工程（英文）》 2020年第6卷第2期页码 165-172 doi: 10.1016/j.eng.2019.11.007

摘要：

全球稀土储量的下降以及当前湿法回收技术对环境造成的影响日益受到人们的关注，开发一种有效回收钕铁硼（Nd-Fe-B）烧结磁体生产过程中剩余油泥的技术已迫在眉睫。本研究选择了Nd-Fe-B烧结磁体加工过程中产生的无心磨削油泥作为原材料。我们对油泥进行了还原扩散（RD）处理，以合成可供回收的钕磁体（Nd₂Fe₁₄B）粉末。通过调节反应温度和油泥中的钙含量，我们系统地研究了Nd-Fe-B油泥回收过程中的反应机理。我们在回收的Nd₂Fe₁₄B颗粒中掺杂了含量为37.7 wt%的Nd₄Fe₁₄B粉末，用以制备Nd-Fe-B烧结磁体

关键词： Nd-Fe-B磨削油泥再生烧结磁体钙还原扩散富稀土合金掺杂

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各向异性热压稀土永磁体的热变形机制及微磁结构研究

李卫,朱明刚

《中国工程科学》 2011年第13卷第10期页码 4-12

摘要： style="text-align: justify;">重点研究制备工艺对各向异性热压稀土永磁体性能的影响，探讨了热压永磁体的热变形机理和数学描述模型，并尝试从微磁结构的角度研究各向异性纳米晶Nd-Fe-B获得了最佳磁性能为：Hcj=1 157 kA/m，Br=1.465 T，(BH)max=426 kJ/m³纳米晶Nd-Fe-B磁体。

关键词：纳米晶Nd-Fe-B辐向环热压－热变形各向异性微磁结构

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Human-cyber-physical systems: concepts, challenges, and research opportunities

Zhiming Liu, Ji Wang,zhimingliu88@swu.edu.cn,jiwang@ios.ac.cn

《信息与电子工程前沿（英文）》 2020年第21卷第11期页码 1535-1670 doi: 10.1631/FITEE.2000537

摘要： In this perspective article, we first recall the historic background of human-cyber-physical systems (HCPSs), and then introduce and clarify important concepts. We discuss the key challenges in establishing the scientific foundation from a system engineering point of view, including (1) complex heterogeneity, (2) lack of appropriate , (3) dynamic black-box integration of heterogeneous systems, (4) complex requirements for functionalities, performance, and quality of services, and (5) design, implementation, and maintenance of HCPS to meet requirements. Then we propose four research directions to tackle the challenges, including (1) and computational theory of HCPS, (2) theories and methods of HCPS , (3) specification and verification of model properties, and (4) software-defined HCPS. The article also serves as the editorial of this special section on cyber-physical systems and summarises the four articles included in this special section.

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快速热处理制备纳米耦合Nd-Fe-B磁体的结构与磁性能研究 Review

杨金波, 韩景智, 田海东, 查亮, 张雄祚, 金哲星, 梁栋, 杨文云, 刘顺荃, 王常生

《工程（英文）》 2020年第6卷第2期页码 131-139 doi: 10.1016/j.eng.2019.12.008

摘要：在本工作中，我们总结了快速热处理技术——电子束曝光，对Nd_12.5-xFe_80.8+xB_{相比于传统退火技术所需的退火晶化时间（15 min），电子束曝光下结晶时间仅需0.1 s，并且所需结晶温度降低约248 ℃（Nd₂Fe₁₄B单相材料）。在电子束曝光条件下，还观察到Nd₂Fe₁₄B和α-Fe相协同晶化效应。随着Fe含量的增加，协同晶化的影响变得更加明显。由于电子束曝光下协同晶化改善了Nd₂Fe₁₄B和α-Fe相的均匀性以及抑制了晶粒的过度生长，因而电子束曝光相比于传统退火技术使材料获得了更加优异的磁性能}

关键词：纳米耦合电子束曝光朗道和郎之万动力学模拟协同晶化

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The performance of nitrate-reducing Fe(II) oxidation processes under variable initial Fe/N ratios: The

《环境科学与工程前沿（英文）》 2021年第15卷第4期 doi: 10.1007/s11783-020-1366-2

摘要：

•Bacterially-mediated coupled N and Fe processes examined in incubation experiments.

关键词： Denitrification N₂O emission Fe(II) oxidation Fe/N ratio Fe minerals

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Cadmium removal mechanistic comparison of three Fe-based nanomaterials: Water-chemistry and roles ofFe dissolution

《环境科学与工程前沿（英文）》 2022年第16卷第12期 doi: 10.1007/s11783-022-1586-8

摘要：

● nZVI, S-nZVI, and nFeS were systematically compared for Cd(II) removal.

关键词： Nano zero valent iron Sulfided zero valent iron FeS Cd(II) immobilization Fe dissolution

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Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

《化学科学与工程前沿（英文）》 2023年第17卷第1期页码 102-115 doi: 10.1007/s11705-022-2179-6

摘要： High-performance and stable electrocatalysts are vital for the oxygen evolution reaction (OER). Herein, via a one-pot hydrothermal method, Ni/Fe/V ternary layered double hydroxides (NiFeV-LDH) derived from Ni foam are fabricated to work as highly active and durable electrocatalysts for OER. By changing the feeding ratio of Fe and V salts, the prepared ternary hydroxides were optimized. At an Fe:V ratio of 0.5:0.5, NiFeV-LDH exhibits outstanding OER activity superior to that of the binary hydroxides, requiring overpotentials of 269 and 274 mV at 50 mA·cm^–2 in the linear sweep voltammetry and sampled current voltammetry measurements, respectively. Importantly, NiFeV-LDH shows extraordinary long-term stability (≥ 75 h) at an extremely high current density of 200 mA·cm^–2. In contrast, the binary hydroxides present quick decay at 200 mA·cm^–2 or even reduced current densities (150 and 100 mA·cm^–2). The outstanding OER performance of NiFeV-LDH benefits from the synergistic effect of V and Fe while doping the third metal into bimetallic hydroxide layers: (a) Fe plays a crucial role as the active site; (b) electron-withdrawing V stabilizes the high valence state of Fe, thus accelerating the OER process; (c) V further offers great stabilization for the formed intermediate of FeOOH, thus achieving superior durability.

关键词： oxygen evolution reaction electrocatalysts ternary layered double hydroxides long-term stability

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Floret-like Fe–N nanoparticle-embedded porous carbon superstructures from a Fe-covalent triazine polymer

《化学科学与工程前沿（英文）》 2023年第17卷第5期页码 525-535 doi: 10.1007/s11705-022-2232-5

摘要： Fe–N_x nanoparticles-embedded porous carbons with a desirable superstructure have attracted immense attention as promising catalysts for electrochemical oxygen reduction reaction. Herein, we employed Fe-coordinated covalent triazine polymer for the fabrication of Fe–N_x nanoparticle-embedded porous carbon nanoflorets (Fe/N@CNFs) employing a hypersaline-confinement-conversion strategy. Presence of tailored N types within the covalent triazine polymer interwork in high proportions contributes to the generation of Fe/N coordination and subsequent Fe–N_x nanoparticles. Owing to the utilization of NaCl crystals, the resultant Fe/N@CNF-800 which was generated by pyrolysis at 800 °C showed nanoflower structure and large specific surface area, which remarkably suppressed the agglomeration of high catalytic active sites. As expect, the Fe/N@CNF-800 exhibited unexpected oxygen reduction reaction catalytic performance with an ultrahigh half-wave potential (0.89 V vs. reversible hydrogen electrode), a dominant 4e^– transfer approach and great cycle stability (> 92% after 100000 s). As a demonstration, the Fe/N-PCNF-800-assembled zinc–air battery delivered a high open circuit voltage of 1.51 V, a maximum peak power density of 164 mW·cm^–2, as well as eminent rate performance, surpassing those of commercial Pt/C. This contribution offers a valuable avenue to exploit efficient metal nanoparticles-based carbon catalysts towards energy-related electrocatalytic reactions and beyond.

关键词： Fe–N_x nanoparticles hypersaline-confinement conversion floret-like carbon covalent triazine polymers oxygen reduction reaction

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Ni-B_i 助剂用于α-Fe₂O₃ Letter

党珂,王拓,李澄澄,张冀杰,刘珊珊,巩金龙

《工程（英文）》 2017年第3卷第3期页码 285-289 doi: 10.1016/J.ENG.2017.03.005

摘要：

本文提出了镍-硼酸(Ni-B_i) 助催化剂负载于α 型三氧化二铁(Fe₂O₃) 具有提升表面动力学和钝化表面态的双重作用Ni-B_i助剂的负载使Fe₂O₃ 光电阳极的光电流起始电位产生230 mV 的负移，1.23 V(vs.Ni-B_i助剂层中的B_i 促进了产氧反应的脱质子步骤。

关键词：镍-硼酸 &alpha 型三氧化二铁产氧反应助催化剂

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Toll-like receptor signaling in hematopoietic homeostasis and the pathogenesis of hematologic diseases

null

《医学前沿（英文）》 2015年第9卷第3期页码 288-303 doi: 10.1007/s11684-015-0412-0

摘要：

Toll-like receptors (TLRs), which are found in innate immune cells, are essential mediators of rapid inflammatory responses and appropriate T-cell activation in response to infection and tissue damage. Accumulating evidence suggests that TLR signaling is involved in normal hematopoiesis and specific hematologic pathologies. Particular TLRs and their downstream signaling mediators are expressed not only in terminally differentiated innate immune cells but also in early hematopoietic progenitors. Sterile activation of TLR signaling is required to generate early embryonic hematopoietic progenitor cells. In adult animals, TLR signaling directly or indirectly promotes differentiation of myeloid cells at the expense of that of lymphoid cells and the self-renewal of hematopoietic stem cells during infection and tissue damage. Activating mutations of the MyD88 gene, which codes for a key adaptor involved in TLR signaling, are commonly detected in B-cell lymphomas and other B-cell hematopathologies. Dysregulated TLR signaling contributes to the pathogenesis of many hematopoietic disorders, including bone marrow failure, myelodysplastic syndrome, and acute myeloid leukemia. Complete elucidation of the molecular mechanisms by which TLR signaling mediates the regulation of both normal and pathogenic hematopoiesis will prove valuable to the development of targeted therapies and strategies for improved treatment of hematopoietic disorders.

关键词： TLR MyD88 hematopoiesis bone marrow failure leukemia myelodysplastic syndrome

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Effect of Fe on NO release during char combustion in air and O

Ying GU, Xiaowei LIU, Bo ZHAO, Minghou XU

《能源前沿（英文）》 2012年第6卷第2期页码 200-206 doi: 10.1007/s11708-012-0181-2

摘要： The chemistry of char was probed by studying nitrogen release under the reactions with air and oxy-fuel combustion. The experiments were conducted in a drop tube furnace and a fixed bed flow reactor. NO was observed during those experiments. The results show that the particle size of char generated at 1073 K in CO is larger than that in N . However, at 1573 K, it is smaller in CO atmosphere due to particle breaking by gasification of char and CO . The Fe addition increases the NO conversion ratio, and the effect of Fe rises steeply with the process going until it becomes stable in the end. The results also indicate that the release of NO increases more significantly with the Fe addition in oxy-fuel environment.

关键词： NO Fe char combustion CO₂