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Journal of Advanced Ceramics 2022年第1期11卷 120-135页

作者： Yang lyu Baihe DU Guiqing CHEN Guangdong ZHAO Yuan CHENG Shanbao ZHOU Qingrong LV Xinghong ZHANG Wenbo HAN National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080China School of Physics and Material Science Anhui UniversityHefei 230601China

To further improve the oxidation resistance of polymer derived ceramic(PDC)composites in harsh environments,Cf/SiC/SiHfBOC composites were prepared by chemical vapor infiltration(CVI)and precursor impregnation pyrolysis(PIP)*** weight retention change,mechanical properties,and microstructure of C/SiC/SiHfBOC before and after oxidation in air were studied in *** analyses showed that only the interface between the ceramics and fibers was oxidized to some extent,and hafnium had been enriched on the composite surface after oxidizing at different *** main oxidation products of Cf/SiC/SiHfBOC composites were Hf0_(2)and HfSi04 after oxidation at 1500℃for 60 ***,the weight retention ratio and compressive strength of the Cf/SiC/SiHfBOC composites are 83.97%and 23.88±3.11 MPa,*** indicates that the Cf/SiC/SiHfBOC composites should be promising to be used for a short time in the oxidation environment at 1500℃.

关键词： Cf/SiC/SiHfBOC composites precursor infiltration pyrolysis(PIP)method mechanical properties high-temperature oxidation resistance

Discovery of natural products capable of inducing porcine host defense peptide gene expression using cell-based high throughput screening

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Journal of Animal Science and Biotechnology 2021年第2期12卷 598-610页

作者： Jing Wang Wentao lyu Wei Zhang Yonghong Chen Fang Luo Yamin Wang Haifeng Ji Guolong Zhang Institute of Animal Husbandry and Veterinary Medicine Beijing Academy of Agriculture and Forestry SciencesBeijingChina Sino-US Joint Laboratory of Animal Science Beijing Academy of Agriculture and Forestry SciencesBeijingChina Institute of Quality and Standard for Agro-products Zhejiang Academy of Agricultural SciencesHangzhouChina College of Agriculture Ningxia UniversityYinchuanChina Department of Animal and Food Sciences Oklahoma State UniversityStillwaterOKUSA

Background:In-feed antibiotics are being phased out in livestock production *** to antibiotics are urgently needed to maintain animal health and production *** defense peptides(HDPs)are known for their broad-spectrum antimicrobial and immunomodulatory *** the synthesis of endogenous HDPs represents a promising antibiotic alternative strategy to disease control and ***:To identify natural products with an ability to stimulate the synthesis of endogenous HDPs,we performed a high-throughput screening of 1261 natural products using a newly-established stable luciferase reporter cell line known as IPEC-J2/*** ability of the hit compounds to induce HDP genes in porcine IPEC-J2 intestinal epithelial cells,3D4/31 macrophages,and jejunal explants were verified using *** of the antibacterial activity of porcine 3D4/31 macrophages against a Gram-negative bacterium(enterotoxigenic ***)and a Gram-positive bacterium(Staphylococcus aureus)were further confirmed with four selected HDP-inducing ***:A total of 48 natural products with a minimum Z-score of 2.0 were identified after high-throughput screening,with 21 compounds giving at least 2-fold increase in luciferase activity in a follow-up dose-response *** and deoxyshikonin were further found to be the most potent in inducing pBD3 mRNA expression,showing a minimum 10-fold increase in IPEC-J2,3D4/31 cells,and jejunal *** compounds such as isorhapontigenin and calycosin also enhanced pBD3 mRNA expression by at least 10-fold in both IPEC-J2 cells and jejunal explants,but not 3D4/31 *** addition to pBD3,other porcine HDP genes such as pBD2,PG1-5,and pEP2C were induced to different magnitudes by xanthohumol,deoxyshikonin,isorhapontigenin,and calycosin,although clear gene-and cell type-specific patterns of regulation were ***,these four compounds had a minimum effect on the expre

关键词： Antibiotic alternatives High throughput screening HDP inducers Host defense peptides Natural products

一种超参数自适应航天器交会变轨策略优化方法

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宇航学报 2024年第1期45卷 52-62页

作者：孙雷翔郭延宁邓武东吕跃勇马广富哈尔滨工业大学(深圳)空间科学与应用技术研究院深圳518055 哈尔滨工业大学航天学院哈尔滨150001 上海卫星工程研究所上海201109

利用强化学习技术,本文提出了一种超参数自适应的燃料最优地球同步轨道(GEO)航天器交会变轨策略优化方法。首先,建立了GEO航天器交会Lambert变轨模型。以变轨时刻为决策变量、燃料消耗为适应度函数,使用改进式综合学习粒子群算法(ICLPSO... 详细信息

利用强化学习技术,本文提出了一种超参数自适应的燃料最优地球同步轨道(GEO)航天器交会变轨策略优化方法。首先,建立了GEO航天器交会Lambert变轨模型。以变轨时刻为决策变量、燃料消耗为适应度函数,使用改进式综合学习粒子群算法(ICLPSO)作为变轨策略优化的基础方法。其次,考虑到求解的最优性和快速性,重新设计了以粒子群算法(PSO)优化结果为参考基线的奖励函数。使用一族典型GEO航天器交会工况训练深度确定性策略梯度神经网络(DDPG)。将DDPG与ICLPSO组合为强化学习粒子群算法(RLPSO),从而实现算法超参数根据实时迭代收敛情况的自适应动态调整。最后,仿真结果表明与PSO、综合学习粒子群算法(CLPSO)相比,RLPSO在较少迭代后即可给出适应度较高的规划结果,减轻了迭代过程中的计算资源消耗。

关键词：地球同步轨道 Lambert变轨强化学习粒子群算法深度确定性策略梯度

Iron-Imprinted Single-Atomic Site Catalyst-Based Nanoprobe for Detection of Hydrogen Peroxide in Living Cells

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Nano-Micro Letters 2021年第9期13卷 364-376页

作者： Zhaoyuan lyu Shichao Ding Maoyu Wang Xiaoqing Pan Zhenxing Feng Hangyu Tian Chengzhou Zhu Dan Du Yuehe Lin School of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164USA School of Chemical Biologicaland Environmental EngineeringOregon State UniversityCorvallisOR 97331USA Irvine Materials Research Institute(IMRI) University of CaliforniaIrvineCA 92697USA

Fe-based single-atomic site catalysts(SASCs),with the natural metalloproteases-like active site structure,have attracted widespread attention in biocatalysis and ***,controlling the isolated single-atom Fe-N-C active site structure is crucial to improve the SASCs’*** this work,we use a facile ion-imprinting method(IIM)to synthesize isolated Fe-N-C single-atomic site catalysts(IIM-Fe-SASC).With this method,the ion-imprinting process can precisely control ion at the atomic level and form numerous well-defined single-atomic Fe-N-C *** IIM-Fe-SASC shows better peroxidase-like activities than that of non-imprinted *** to its excellent properties,IIM-Fe-SASC is an ideal nanoprobe used in the colorimetric biosensing of hydrogen peroxide(H_(2)O_(2)).Using IIM-Fe-SASC as the nanoprobe,in situ detection of H_(2)O_(2)generated from MDA-MB-231 cells has been successfully demonstrated with satisfactory sensitivity and *** work opens a novel and easy route in designing advanced SASC and provides a sensitive tool for intracellular H_(2)O_(2)detection.

关键词： Single-atomic site catalysts Nanoprobe Peroxidase-like activities Biosensing Living cell

基于LC-GAN的电力碳排放数据异常检测方法

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电气自动化 2024年第2期46卷 91-94页

作者：张钰吕干云胥家伟刘柏岑臧禹南京工程学院电力工程学院江苏南京211167 国网江苏盱眙供电公司江苏淮安211700

针对目前电力碳排放数据存在的坏数据虚假注入问题,提出一种基于生成对抗网络的电力碳排放数据异常检测方法。首先构建面向时序数据的改进生成对抗网络,引入双层长短期记忆网络,深入挖掘时序数据的内在联系;再通过生成对抗网络改进模型... 详细信息

针对目前电力碳排放数据存在的坏数据虚假注入问题,提出一种基于生成对抗网络的电力碳排放数据异常检测方法。首先构建面向时序数据的改进生成对抗网络,引入双层长短期记忆网络,深入挖掘时序数据的内在联系;再通过生成对抗网络改进模型的生成器和判别器的共同打分,判别电力碳排放数据异常值;最后在华东某省碳排放监测平台进行电力碳排放数据测试。结果表明,基于生成对抗网络改进模型的电力碳排放数据异常检测方法对抗训练稳定、损失函数收敛速度快,检出率为87.5%,针对电力碳排放时序异常数据检测的准确度较高。

关键词：电力碳排放生成对抗网络双层长短期记忆网络时序数据数据异常检测

Laser-induced forward transferred silver nanomembrane with controllable light absorption

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Journal of Central South University 2022年第10期29卷 3399-3409页

作者： LI Ruo-zhou GUO lyu-jiu YANG Ming-qing QU Ke YAN Jing College of Integrated Circuit Science and Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Electronic and Optical Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China

Laser processing provides highly-controlled modification and on-demand fabrication of plasmon metal nanostructures for light absorption and photothermal *** present the laser-induced forward tansfer(LIFT)fabrication of silver nanomembranes in control of light *** varying the hatch distance,different morphologies of randomly distributed plasmon silver nanostructures were produced,leading to well-controlled light absorption levels from 11%to 81%over *** anti-reflection features were maintained below 17%.Equilibrated and plain absorptions were obtained throughout all absorption levels with a maximum intensity fluctuation of±8.5%for the 225μJ *** 45μJ pulse energy can offer a highly equilibrated absorption at a 60%absorption level with an intensity fluctuation of±1%.Pattern transfer was also achieved on a thin tape *** laser-transferred characters and patterns demonstrate a localized temperature rise.A rapid temperature rising of roughly 15℃can be achieved within 1 *** LIFT process is highly efficiently fabricated with a typical speed value of 10^(3)to 10^(5)cm^(2)/*** results indicated that LIFT is a well-controlled and efficient method for the production of optical films with specific absorption levels.

关键词： laser-induced forward transfer silver nanomembrane controllable light absorption laser printing

光催化技术在塑料废弃物升级回收中的研究进展

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能源环境保护 2024年第05期38卷 24-36页

作者：龚正雅张明于志昊熊健李易明吕学斌西藏大学生态环境学院西藏自治区高原环境工程与污染控制重点实验室中国能源建设集团安徽省电力设计院天津大学环境科学与工程学院

塑料因其成本效益、便携性、耐久性和多功能性而广为人知，是现代社会中不可或缺的一部分。然而，日益增加的塑料废弃物堆积正在引发全球性的污染危机。近年来，塑料升级回收已成为应对该危机的重要手段，它不仅提供了可持续的解决方案... 详细信息

塑料因其成本效益、便携性、耐久性和多功能性而广为人知，是现代社会中不可或缺的一部分。然而，日益增加的塑料废弃物堆积正在引发全球性的污染危机。近年来，塑料升级回收已成为应对该危机的重要手段，它不仅提供了可持续的解决方案来减轻环境污染，还将塑料废弃物转化为高附加值的产品。光催化技术利用太阳能作为唯一能源驱动塑料升级回收，有望在能量中性的条件下同时实现清洁能源储存、资源可持续性和环境修复。首先简要回顾了光催化技术在塑料转化中的发展历程。其次分析了塑料的光催化降解及在非均相和均相条件下的光催化升级回收机理；从机理角度出发，重点讨论了在2种相态下应用光催化技术升级回收塑料废弃物的最新研究进展。最后，结合催化体系的合理设计和优化、机理探究、塑料升级回收的实际应用及光催化技术的耦合等方面，探讨了塑料光催化升级回收面临的挑战和机遇。期望为推动光催化技术在塑料升级回收的工业化应用，开发更绿色、经济和可持续的塑料升级回收技术提供一定的见解和参考。

关键词：塑料废弃物升级回收增值产品非均相光催化均相光催化

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Analysis of Knowledge Level and Use of Antiretroviral Pre-Exposure and Post-Exposure Prophylaxis Among MSM—China,2019–2022

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China CDC weekly 2023年第13期5卷 292-296页

作者： Jiahuan Guo Wenting Kang Tongtong Liu Jie Xu Houlin Tang Fan lyu Guang Zhang National Center for AIDS/STD Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina Chinese Association of STD&AIDS Prevention and Control BeijingChina Chinese Center for Health Education BeijingChina

Summary What is already known on this topic?Men who have sex with men(MSM)in China have a high rate of human immunodeficiency virus(HIV)***-exposure prophylaxis(PrEP)and postexposure prophylaxis(PEP)have been shown to be effective in preventing HIV,which may help to contain the HIV epidemic among *** is added by this report?This study found that knowledge and usage of PrEP were low among MSM,indicating that this population is at high risk for HIV *** of PrEP and PEP among MSM is necessary to reduce the risk of HIV infection in this *** are the implications for public health practice?PrEP and PEP are novel HIV prevention strategies that have been demonstrated to be effective and *** further reduce HIV transmission among MSM in China,it is necessary to promote the use of PrEP and PEP.

关键词： prevention MSM immunodeficiency

Inhibiting the bipolar effect via band gap engineering to improve the thermoelectric performance in n-type Bi_(2-x)Sb_(x)Te_(3)for solid-state refrigeration

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Journal of Materials Science & Technology 2023年第7期138卷 50-58页

作者： Dongliang Su Jiahui Cheng Shan Li Shengnan Zhang Tu lyu Chaohua Zhang Junqin Li Fusheng Liu Lipeng Hu College of Materials Science and Engineering Shenzhen Key Laboratory of Special Functional MaterialsGuangdong Research Center for Interfacial Engineering of Functional MaterialsGuangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and UtilizationInstitute of Deep Earth Sciences and Green EnergyShenzhen UniversityShenzhen 518060China Superconducting Materials Research Center Northwest Institute for Nonferrous Metal ResearchXi’an 710016China

To date,the benchmark Bi_(2)Te_(3)-based alloys are still the only commercial material system used for ther-moelectric solid-state ***,the conspicuous performance imbalance between the p-type Bi_(2-x)Sb_(x)Te_(3)and n-type Bi_(2)Te_(3-x)Se_(x) legs has become a major obstacle for the improvement of cooling devices to achieve higher *** our previous study,novel n-type Bi_(2-x)Sb_(x)Te_(3)alloy has been pro-posed via manipulating donor-like effect as an alternative to mainstream n-type Bi_(2)Te_(3-x)Se_(x).However,the narrow bandgap of Bi_(2-x)Sb_(x)Te_(3)provoked severe bipolar effect that constrained the further improvement of zT near room ***,we have implemented band gap engineering in n-type Bi_(1.5)Sb_(0.5)Te_(3)by employing isovalent Se substitution to inhibit the undesired intrinsic excitation and achieve the dis-tinguished room-temperature ***,the preferential occupancy of Se at Te^(2)site appropriately enlarges the band gap,thereby concurrently improving the Seebeck coefficient and depressing the bipolar thermal *** addition,the Se alloying mildly suppresses the compensation mechanism and essentially preserves the already optimized carrier concentration,which maintains the peak zT near room ***,the large strain field and mass fluctuation generated by Se alloying leads to the remark-able reduction of lattice thermal ***,the zT value of Bi_(1.5)Sb_(0.5)Te_(2.8)Se_(0.2)reaches 1.0 at 300 K and peaks 1.1 at 360 K,which surpasses that of most well-known room-temperature n-type thermoelectric *** results pave the way for n-type Bi_(2-x)Sb_(x)Te_(3)alloys to become a new and promising top candidate for large-scale solid-state cooling applications.

关键词： Thermoelectric Bi_(2)Te_(3) Band gap Bipolar effect Point defects

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煤粉气化低氮灵活燃烧研究进展

电力科技与环保 2024年第1期40卷 1-8页

作者：吕钊敏熊小鹤谭厚章王学斌王肖肖热流科学与工程教育部重点实验室(西安交通大学) 陕西西安710049

20世纪80年代,全俄热工研究院提出煤粉气化低氮灵活燃烧技术,该技术通过增加独立气化区域解耦了传统燃烧过程中挥发分析出阶段、燃烧阶段和燃烬阶段,使挥发分析出和焦炭燃烧成为2个独立的过程,并通过调控热解挥发分与焦炭的燃烧反应,在... 详细信息

20世纪80年代,全俄热工研究院提出煤粉气化低氮灵活燃烧技术,该技术通过增加独立气化区域解耦了传统燃烧过程中挥发分析出阶段、燃烧阶段和燃烬阶段,使挥发分析出和焦炭燃烧成为2个独立的过程,并通过调控热解挥发分与焦炭的燃烧反应,在实现高效燃烧的同时有效地抑制了氮氧化物(NOx)的生成。综合总结了该技术近40年在煤燃烧领域的基础研究、技术开发和工程示范等方面取得的主要进展,包括该技术的降氮和稳燃原理;并以气化场所不同对煤粉气化低氮工艺进行了分类,着重介绍了流化床气化式和燃烧器气化式的工艺流程及取得的重要成果,同时对最新报道的气流床气化式燃烧工艺进行了介绍;对该技术在碳达峰碳中和背景下应用于大型燃煤电厂实现锅炉(低于20%锅炉负荷)深度调峰进行了工艺路线分析和前景展望,确定了不同煤粉气化低氮燃烧工艺在电站锅炉灵活性改造方面的技术优势、范围以及应注意的问题,以期对煤粉气化低氮灵活燃烧技术在电站锅炉领域的进一步发展提供有益参考。

关键词：气化低氮燃烧深度调峰煤燃烧灵活性改造