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Chinese Chemical Letters 2024年第7期35卷 428-432页

作者： Yiyue Ding Qiuxiang Zhang Lei Zhang Qilu Yao gang Feng Zhang-Hui lu Key Laboratory of Energy Catalysis and Conversion of Nanchang College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China School of Chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China

Formic acid(FA),which is obtainable through CO_(2)hydrogenation with green hydrogen or biomass conversion,has been used as a prospective liquid organic hydrogen carrier(LOHC)because of the abundant advantages of renewability,wide availability,stability,and high volumetric capacity(53 g H_(2)/L).The development of highly efficient catalytic systems to achieve enhanced catalytic activity is attractive but still ***,ultrafine and highly dispersed PdAu nanoclusters(NCs)anchored on amino-modified reduced graphene oxide(ArGO)were successfully synthesized via a facile impregnation-reduction method and applied as a catalyst toward formic acid dehydrogenation(FAD).Benefiting from the promoting effect of amino groups,the strain and ligand effect in the alloy,and the Mott–Schottky effect between PdAu NCs and ArGO,the resultant PdAu/ArGO affords an ultrahigh activity under visible light irradiation with an exceptional turnover frequency value of 10,699.5 h^(-1)at 298 K without any additives,more than 2.6times improvement than that under dark,which is the highest among all reported catalysts under the same *** study provides a green and convenient strategy for developing more efficient and sustainable FAD catalysts and promotes the effective utilization of FA as a prospective renewable LOHC.

关键词： Visible-light-enhanced Hydrogen production Formic acid Pd-Au Heterogeneous catalyst

Upper mantle seismic anisotropy beneath a convergent boundary:SKS waveform modeling in central Tibet

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Science China Earth Sciences 2014年第4期57卷 759-776页

作者： ZHAO Liang ZHAO Ming lu gang State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

This study used SKS waveforms from the International Deep Profiling of Tibet and the Himalayas(INDEPTH) III dataset and a new 2D method for modeling seismic waves in anisotropic media to construct an image of anisotropic structures beneath central Tibet.A preferred model revealed three-segment anisotropic structures in the upper mantle beneath the study *** modeling demonstrated that the anisotropy was mainly generated by the lithosphere but not the asthenosphere,and that an anisotropic model with a flatter axis of symmetry provides a more consistent interpretation of the observations than models having steeply dipping symmetry axes.A relatively low velocity zone may underlie or intermingle with the anisotropic structures in the northern portion of the *** tests also indicate that variations in the elastic constants and depth extent of the anisotropy assumed by the calculations do not affect the general conclusions,although trade-offs exist among certain model *** modeling results suggest that the complex seismic structures in central Tibet were associated with underthrusting of the Indian lithosphere beneath the Asian lithosphere;the inferred flat symmetry axis of the anisotropy was likely generated during this collision *** this were not the case,the inherited anisotropy would exhibit a steeply dipping axis of symmetry,parallel to the direction of underthrusting.

关键词：各向异性结构西藏中部波形模拟上地幔地震波 INDEPTH 建模边界

Extracellular vesicles from iPSC-MSCs alleviate chemotherapy-induced mouse ovarian damage via the ILK-PI3K/AKT pathway

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Zoological Research 2023年第3期44卷 620-635页

作者： Rui-Can Cao Yue Lv gang lu Hong-Bin Liu Wuming Wang Chunlai Tan Xian-Wei Su Zhiqiang Xiong Jin-Long Ma Wai-Yee Chan Center for Reproductive Medicine Shandong UniversityJinanShandong 250012China Hong Kong Branch of CAS Center for Excellence in Animal Evolution and Genetics The Chinese University of Hong KongHong Kong SARChina CUHK-SDU Joint Laboratory on Reproductive Genetics School of Biomedical SciencesFaculty of MedicineThe Chinese University of Hong KongHong Kong SARChina Key Laboratory of Reproductive Endocrinology of Ministry of Education Shandong UniversityJinanShandong 250012China Shandong Key Laboratory of Reproductive Medicine Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandong 250012China SDIVF R&D Centre 12WHKSTPHong Kong SARChina Kunming Institute of Zoology-The Chinese University of Hong Kong(KIZ-CUHK)Joint Laboratory of Bioresources and Molecular Research of Common Diseases Hong Kong SARChina

Chemotherapy can significantly reduce follicle counts in ovarian tissues and damage ovarian stroma,causing endocrine disorder,reproductive dysfunction,and primary ovarian insufficiency(POI).Recent studies have suggested that extracellular vesicles(EVs)secreted from mesenchymal stem cells(MSCs)exert therapeutic effects in various degenerative *** this study,transplantation of EVs from human induced pluripotent stem cell-derived MSCs(iPSC-MSC-EVs)resulted in significant restoration of ovarian follicle numbers,improved granulosa cell proliferation,and inhibition of apoptosis in chemotherapy-damaged granulosa cells,cultured ovaries,and in vivo ovaries in ***,treatment with i PSC-MSC-EVs resulted in up-regulation of the integrinlinked kinase(ILK)-PI3K/AKT pathway,which is suppressed during chemotherapy,most likely through the transfer of regulatory microRNAs(miRNAs)targeting ILK pathway *** work provides a framework for the development of advanced therapeutics to ameliorate ovarian damage and POI in female chemotherapy patients.

关键词： Extracellular vesicles Premature ovarian insufficiency Human induced pluripotent stem cell-derived mesenchymal stem cells ILK-PI3K/AKT pathway

Unraveling energy and charge transfer in type-II van der Waals heterostructures

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npj Computational Materials 2021年第1期7卷 1774-1782页

作者： Junyi Liu Zi Li Xu Zhang gang lu Department of Physics and Astronomy California State UniversityNorthridgeCA 91330-8268USA Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088China

Recent experiments observed significant energy transfer in type-II van der Waals(vdW)heterostructures,such as WS_(2)/MoSe_(2),which is surprising due to their staggered band alignment and weak spectral *** this work,we carry out first-principles calculations to shed light on energy and charge transfer in WS_(2)/MoSe_(2) *** excitonic effect in nonadiabatic electronic dynamics,our first-principles calculations uncover a two-step process in competing energy and charge transfer,unravel their relative efficiencies and explore the means to control their *** both Dexter and Förster mechanisms can be responsible for energy transfer,they are shown to operate at different *** excitonic effect is revealed to drive ultrafast energy and charge transfer in type-II WS_(2)/MoSe_(2) *** work provides a comprehensive picture of exciton dynamics in vdW heterostructures and paves the way for rational design of novel vdW heterostructures for optoelectronic and photovoltaic applications.

关键词： transfer energy charge

Role of silicon in steels on galvanized coatings

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Acta Metallurgica Sinica(English Letters) 2009年第2期22卷 138-145页

作者： Chunshan CHE Jintang lu gang KONG Qiaoyu XU College of Materials Science and Engineering South China University of Technology Guangzhou 510640 China

In this article, five kinds of silicon-containing steel sheets have been electrodeposited, and then immersed in a pure molten zinc bath at 450℃ for various periods of time. The results by scanning electron microscopy （SEM） show that the coating of the sample （0.09 wt pct Si） with iron-electrodeposited pretreatment eliminates the reactive zones which are found in the coating without iron-electrodeposited pretreatment. The galvanized sample （0.28 wt pct Si） with iron-electrodeposited pretreatment exhibits a compact and coherent coating. The coating of the sample （0.37 wt pct Si） with the iron-electrodeposited pretreatment experiences a transition from a compact and coherent coating to a reactive one. The energy dispersive spectrum （EDS） results reveal that for the galvanized samples with iron-electrodeposited pretreatment, excessive silicon accumulates on the surface of the substrate due to the low solubility of silicon in the Г, after the iron layer is depleted by the increasing growth of the Fe-Zn intermetallics. With the movement of the substrate/Г interface toward the substrate, silicon-enriched α-Fe peels off from the substrate and breaks into the particles. The particles move toward the δ layer through the Г layer because silicon-enriched α-Fe cannot be absorbed in the F layer. When the particles reach the δ/Г interface, they are dissolved in the δ laver, making the F laver thin or even vanish.

关键词： Zn coating Intermetallics Steel Electrodeposition Iron

运营商大模型硬件基础设施创新及RDMA流量控制技术研究

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信息通信技术与政策 2024年第2期50卷 26-32页

作者：车碧瑶张永航廖怡唐剑樊小平赵继壮陆钢中国电信股份有限公司研究院北京102209 中国电信天翼云科技有限公司北京100007

从业界大模型硬件基础设施创新的主要模式出发,论述了电信运营商在该领域自主创新的路线选择考虑。基于实际组网环境和业务场景提出需求,设计了一种支持NO-PFC、交换机免配置的拥塞控制算法,使用RTT作为拥塞感知信号,控制交换机队列长度... 详细信息

从业界大模型硬件基础设施创新的主要模式出发,论述了电信运营商在该领域自主创新的路线选择考虑。基于实际组网环境和业务场景提出需求,设计了一种支持NO-PFC、交换机免配置的拥塞控制算法,使用RTT作为拥塞感知信号,控制交换机队列长度,实现低延迟。

关键词： RDMA拥塞控制大模型基础设施创新运营商数据中心网络

Identification and genetic characterization of bovine hepacivirus in China:A large scale epidemiological study

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Virologica Sinica 2022年第2期37卷 223-228页

作者： gang lu Chaoxi Chen Ran Shao Juan Zhang Jinghao Li Siqi Cai Lintao Zhong Zhiying Lai Jiajun Ou Xin Yin Guihong Zhang Shoujun Li College of Veterinary Medicine South China Agricultural UniversityGuangzhou510642China State Key Laboratory of Veterinary Biotechnology Harbin Veterinary Research InstituteThe Chinese Academy of Agricultural SciencesHarbin150000China Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases Guangzhou510642China Guangdong Technological Engineering Research Center for Pet Guangzhou510642China College of Life Science and Technology Southwest Minzu UniversityChengdu610041China General Station of Forest and Grassland Pest Management National Forestry and Grassland AdministrationShenyang110000China

Bovine hepacivirus(BovHepV)is a novel virus that was recently discovered in Ghana and Germany in *** now,this virus has been identified in cattle population worldwide and is classified into subtypes *** fully understand the epidemic situation and genetic characteristic of BovHepV in China,a total of 612 cattle serum samples were collected from 20 farms in seven provinces and municipality in China between 2018 and 2020 and were tested for the presence of BovHepV RNA via semi-nested *** results demonstrated that 49(8.0%)samples were BovHepV *** is noted that BovHepV infection in yak was confirmed for the first *** was detected in all the seven provinces,with the positive rate ranging from 3.1%to 13.3%,which indicates a wide geographical distribution pattern of BovHepV in *** results revealed that 5'UTR of the 49 field BovHepV strains have a nucleotide similarity of 96.3%-100%between each other and 93.9%-100%with previously reported BovHepV *** addition,genetic analysis identified five critical nucleotide sites in 5'UTR to distinguish different subtypes,which was further verified by genomic sequencing and nucleotide similarity *** the 49 Chinese field BovHepV strains were classified into subtype G and this subtype is only determined in cattle in China *** study will provide insights for us to better understand the epidemiology and genetic diversity of BovHepV.

关键词： Bovine hepacivirus(BovHepV) China Epidemiology Genetic diversity Cattle

Reaction of titanium investment castings made by Zr(CH3COO)2-Y2O3 shell

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Rare Metals 2017年第6期36卷 465-471页

作者： Xin Guo Ya-Meng Wei Zhi-gang lu Department of Mechanical Engineering Tsinghua UniversityBeijing 100084 China Academy of Opto-Electronics Chinese Academy of SciencesBeijing 100094 China State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084 China

The forming process and mechanism of the reaction of Ti-6Al-4V investment casting made by Zr（CH3COO）2-Y2O3 shell in vacuum casting was *** was manipulated to study the distributions and types of the reaction layers. The morphology and composition of the reaction layers were tested using field emission scanning electron microscopy（FESEM） combined with energy-dispersive spectroscopy（EDS）. Phase of the reaction layers was characterized by X-ray diffraction（XRD）.Composition of the shell reaction zone was measured by X-ray fluorescence（XRF） method. The results suggest the reaction contains oxidation and element evaporation, and the melt reacts little with the shell but mainly with the remnant gas. The reaction layers contain three types due to different forming stages： the titanium oxidation film, the concretion film and the shell reaction zone. The interfacial temperature and pressure affect the reaction mechanism and degree, leading to three types of concretion films that differ in thickness, content and color.

关键词： Titanium alloy Investment casting Reaction Oxidation Element evaporation

Thermodynamic modeling of Cr-Al-C and Ni-Al-C systems for low-density steels

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Journal of Iron and Steel Research(International) 2020年第10期27卷 1190-1199页

作者： Wei-sen Zheng Yan-lin He Xiao-gang lu State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China

The so-called low-density steels have generated a lot of interests with their high specific strength and ductility due to the addi-tion of the light element *** order to accelerate the low-density steel design,a thermodynamic database has been developedwithin the present author *** Al-containing systems,i.e.,Cr-Al-Cand Ni-Al-C,were modeled and optimirzed with CALPHAD approach based on the reliable binary *** Cr-Al-C,system,the Gibbs energy of Cr2AlC phasewas described by a temperature-dependent polynomial with the aid of the experimental data on the heat capacity,instead of estimating heat capacity from Ncumann-Kopp *** incongruent melting temperature of Cr2AlC is 1762 K with theinvariant reaction of liquid+Cr3C2+Al4C3→*** phase equilibria between Cr2AlC and binary phases were wellreproduced by using the present model *** Ni-Al-C system,the liquid,fec and bec phases have been optimizedto fit the carbon solubility in these three phases.A good agreement between the calculated and experimental data has beenobtained using the present description of Ni-Al-C *** reliable descriptions of the two ternary systems developedin the present work can be implemented into the thermodynamic database for low-density steels.

关键词： Cr-Al-C system Ni-Al-C system Thermodynamic model CALPHAD Low-density steel

基于数据采集技术的LNG储罐自动化焊接过程监测与优化分析

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集成电路应用 2024年第7期41卷 224-225页

作者：孔令良周鲁兵吴慧峰夏羽丁孟嘉夏浩卢岗南通中集太平洋海洋工程有限公司江苏226265 陕西丝路机器人智能制造研究院有限公司陕西721300

阐述基于数据采集技术的自动化焊接过程监测系统的设计,该系统可以实时监测焊接过程中的关键参数,对焊接过程的数据进行采集与传输、分析与预测,并探讨基于数据采集技术的优化设计方案。

关键词：数据采集技术 LNG储罐自动化焊接