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STUDY OF PREPARATION PROCESS OF TUNGSTEN POWDER BY ShS WITh A MAGNESIUM ThERMIT STAGE

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 719-724页

作者： T.A.Zhang Y.L.Wang Z.h.Dou h.yang SchoolofMetallurgy＆Materials NortheasternUniversityShenyang110004China InstituteofMetalResearch TheChineseAcademyofSciencesShenyang110016Ghina

Tungsten powder was fabricated from the system CaWO4-Mg by self-propagating high-temperature synthesis (ShS) with a magnesium thermit stage. The physic-chemical change during heating and the effects of pressure of sample and diluents (W powder) on product have been studied. The experimental results show that the porosity of combustion product and the particle size of final tungsten powder decrease with increasing pressure of sample. Addition of diluents could increase the particle size of final tungsten powder. The purity of tungsten is improved by leaching in NaOh solution. The results of spectral analysis and particle size distribution of final tungsten powder show that the final Tungsten powder has a median diameter of 0.87μm,specific surface area of 1.09m2/g and purity of above 99.0%.

关键词： self-propagating high-temperature synthesis (ShS) magnesium thermit,tungsten Powder

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面向问题解决的信息素质教育游戏设计

图书情报工作 2015年第17期59卷 6-12页

作者：吴建华陈雅楠 harrison h.yang 张斯婷华中师范大学信息管理学院武汉430079 School of Education State University of New York at Oswegooswego13126

[目的/意义]探索运用游戏的核心机制即问题解决培养学生利用信息解决问题的能力,寻找实施问题解决游戏学习的有效方法和途径。[方法/过程]按照创设情境引入问题、分析问题形成策略、运用策略解决问题、反思总结的思路,针对图书分类排架... 详细信息

[目的/意义]探索运用游戏的核心机制即问题解决培养学生利用信息解决问题的能力,寻找实施问题解决游戏学习的有效方法和途径。[方法/过程]按照创设情境引入问题、分析问题形成策略、运用策略解决问题、反思总结的思路,针对图书分类排架知识的特点,设计分类问题、解密码锁问题、排序问题,置入一系列游戏情境中,并采用Flash制作《启航》小游戏。[结果/结论]问题解决游戏学习可以有效地促进知识的学习和运用,学习就发生在形成策略和反思的过程中,形式多样的支架可以有效地提供知识与信息。分析知识点的本质特征,设计体现这种特征的问题,把问题置入合适的游戏情境中,是设计面向问题解决的信息素质教育游戏的关键和核心工作。

关键词：信息素质教育游戏问题解决游戏学习图书分类排架

Enabling Intelligence at Network Edge: An Overview of Federated Learning

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ZTE Communications 2020年第2期18卷 2-10页

作者： howard h.yang ZhAO Zhongyuan Tony Q.S.QUEK Singapore University of Technology and Design Singapore 487372Singapore Beijing University of Post and Telecommunication Beijing 100876China

The burgeoning advances in machine learning and wireless technologies are forg?ing a new paradigm for future networks, which are expected to possess higher degrees of in?telligence via the inference from vast dataset and being able to respond to local events in a timely manner. Due to the sheer volume of data generated by end-user devices, as well as the increasing concerns about sharing private information, a new branch of machine learn?ing models, namely federated learning, has emerged from the intersection of artificial intelli?gence and edge computing. In contrast to conventional machine learning methods, federated learning brings the models directly to the device for training, where only the resultant param?eters shall be sent to the edge servers. The local copies of the model on the devices bring along great advantages of eliminating network latency and preserving data privacy. Never?theless, to make federated learning possible, one needs to tackle new challenges that require a fundamental departure from standard methods designed for distributed optimizations. In this paper, we aim to deliver a comprehensive introduction of federated learning. Specifical?ly, we first survey the basis of federated learning, including its learning structure and the distinct features from conventional machine learning models. We then enumerate several critical issues associated with the deployment of federated learning in a wireless network, and show why and how technologies should be jointly integrated to facilitate the full imple?mentation from different perspectives, ranging from algorithmic design, on-device training, to communication resource management. Finally, we conclude by shedding light on some po?tential applications and future trends.

关键词： federated learning edge intelligence learning algorithm communication efficiency privacy and security

Excellent strength-ductility combination in Co_(36)Cr_(15)Fe_(18)Ni_(18)Al_(8)Ti_(4)Mo_(1)multi-principal element alloys by dual-morphology B2 precipitates strengthening

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Journal of Materials Science & Technology 2023年第3期134卷 60-66页

作者： X.S.Liu R.Li X.F.Fan Q.Q.Liu X.Tong A.X.Li S.Xu h.yang S.B.Yu M.h.Jiang C.huo P.F.Yu M.T.Dove G.Li State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China College of Computer Science Sichuan UniversityChengdu 610065China School of Physical and Chemical Sciences Queen Mary University of LondonMile End RoadLondon E14NSUnited Kingdom School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Precipitation strengthening provides one of the most widely-used mechanisms for strengthen-ing multi-principal-element alloys(MPEAs).here,we report dual-morphology B2 precipitates in Co_(36)Cr_(15)Fe_(18)Ni_(18)Al_(8)Ti_(4)Mo_(1)MPEA obtained by thermo-mechanical *** microscopy charac-terization reveals that the dual-morphology B2 precipitates are either recrystallized B2 particles formed at the grain boundaries or triple junctions with recrystallization process,or rod-like within the non-recrystallized FCC *** dual-morphology B2 precipitates enhance the yield strength and ultimate tensile strength up to 1120 MPa and 1480 MPa,*** work suggests the mechanical proper-ties of the alloy can be optimized by B2 precipitation strengthening to meet the needs of engineering applications.

关键词： Multi-principal element alloys B2 precipitates heterogeneous nucleation Precipitation strengthening

Time-resolved Photodissociation of Acetaldehyde Molecules by Ultraviolet Excitation

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Time-resolved Photodissociation of Acetaldehyde Molecules by...

第十五届全国化学动力学会议

作者： C.-h.yang S.Bhattacharyya M.Roy K.Liu Institute of Atomic and Molecular Sciences “Academia Sinica” Department of Physics Taiwan University

The broad near-UV absorption continuum of acetaldehyde(Ch3ChO) spanning 240-330 nm has been studied extensively due to the significant roles of the resulting radical products in atmospheric chemistry. In this absorption range, the ground state of acetaldehyde is mainly excited to the first electronic excited singlet state(S) followed by fluorescence or radiationless processes such as internal conversion and intersystem crossing that then lead to different fragmentations. Recently, a roaming pathway, which is anomalous compared with the conventional transition state mechanism, has been proven to play a significant role in the CO+Ch channel from photodissociation of acetaldehyde using static spectroscopy methods. In order to take a different view of the roaming pathway in the time domain, the picosecond(ps) time-resolved time-of-flight(TOF) spectroscopy and velocity map ion imaging(VMI) are implemented to study time evolutions of fragments from the excitation of acetaldehyde to the S state. A 10% gas mixture of acetaldehyde is expanded into the reaction chamber and subsequently pumped and probed by two time-delayed laser beams(pulse width .7 ps). The probe wavelengths are chosen either at 33 nm through 2+1 resonance enhanced multiphoton ionization(REMPI) of Ch or at 30 nm through 2+1 REMPI of CO and 1+1 REMPI of hCO. In addition to resonance detection products, products from dissociative ionization are observed due to the relatively high peak intensities of ps pulses. From the TOF measurements, the Ch signals probed at the REMPI wavelength of ground state show an exponential growth with a rise time .2 ns, 00 ps, or 00 ps at 286 nm, 276 nm, or 266 nm pump wavelength, respectively, which are presumably dominated by radiationless processes. From pump-probe vibrational state selected ion imaging data, the energy partitions of products are partially disentangled with picosecond time resolution.

关键词： acetaldehyde roaming time-resolved VMI REMPI radiationless

Subpulse Drifting of PSR J1110–5637

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Research in Astronomy and Astrophysics 2022年第6期22卷 109-117页

作者： S.J.Dang L.h.Shang L.Lin Q.J.Zhi R.S.Zhao C.B.Wu Z.Y.You A.J.Dong J.T.Bai X.Xu D.D.Zhang h.yang Q.W.Lin School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China School of Physics Science and Technology Xinjiang UniversityUrumqi 830011China

We report a detailed study of polarization characteristics and subpulse drifting in PSR J1110-5637 with the observations of the Parkes 64 m radio telescope at 1369 *** observations revealed that the trailing component of the pulse profile has obvious subpulse drifting,while the leading component has no subpulse *** the two-dimensional fluctuation spectrum(2DFS),we detected three distinct emission modes in the trailing component(modes A,B and C).The emission in mode A is chaotic and indistinguishable,while modes B and C have obvious subpulse *** vertical modulation periods P3of modes B and C are around the mean values of 12 P and 8 P,*** subpulse drifting of PSR J1110-5637 will expand the pulsar sample with multiple subpulse drifting rates,and this will help future systematic studies on the physical origin of the subpulse drifting phenomenon.

关键词： (stars:)pulsars general-(stars:)pulsars individual(PSR J1110-5637)-Stars

Identification of Novel Pre-translational Regulatory Mechanisms for NF-κB Activation

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Identification of Novel Pre-translational Regulatory Mechani...

中华医学会第十五次全国心血管病学大会

作者： Xiao huang Ren Gong Xinyuan Li Fan yang Irene h.yang Xiaoshu Cheng Xiaofeng yang hong Wang Cardiovascular Research Center/Thrombosis Research Center Department of Pharmacology Temple University School of MedicinePhiladelphia PA 19140 Department of Cardiology Second Affiliated Hospital of Nanchang University Department of Cardiology Jiangxi Provincial People’s Hospital Department of Medicine Griffin HospitalDerby CT 06418 Department of Neurology Yale University New Haven HospitalNew Haven CT 06510

NF-κB controlled transcriptional regulation plays a central role in inflammatory and immune responses. Currently understanding about NF-κB activation mechanism emphasizes IκB-tethered complex inactivation in the cytoplasm. In the case of NF-κB activation, IκB phosphorylation leads to its degradation followed by NF-κB relocating to the nuclear and trans-activation of NF-κB targeted genes.

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Design Tools for 3D Mixed Mode Placement

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Design Tools for 3D Mixed Mode Placement

2005 6th International Conference on ASIC

作者： Zhuoyuan Li haixia Yan Xianlong hong Qiang Zhou Jinian Bian hannah h.yang Vijay Pitchumani Department of Computer Science and Technology Tsinghua University Strategic CAD Lab IntelHillsboroOR 97124USA

＜正＞We present a set of design tools for three dimensional （3D） mixed mode placement（MMP）.The hierarchical 3D MMP design tool is composed of a hierarchical clustering package, a new 3D floorplanning tool,route planning tool,and 2D global/detailed placement *** have analyzed the performance of 3D circuit using these *** is shown that total wirelength could be reduced by 25%to 43%compared with traditional 2D design using two to four stacked *** incorporating thermal management and analysis,we also investigate the thermal scalability of 3D integration.

关键词： Thermal management Clustering algorithms Routing Packaging Circuits Complexity theory Nonhomogeneous media Graphical user interfaces Temperature Computer science

Is high relative humidity associated with childhood hand,foot,and mouth disease in rural and urban areas?

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Is high relative humidity associated with childhood hand,foo...

2015年度安徽省流行病与卫生统计学学术论坛

作者： h.yang J.Wu J.Cheng X.Wang L.Wen K.Li h.Su Department of Epidemiology and health Statistic School of Public HealthAnhui Medical University hefei Center for Disease Control and Prevention

Objective:To examine the relationship between relative humidity and childhood hand,foot and mouth disease(hFMD) in hefei,China,and to explore whether the effect is different between urban and rural *** design:Retrospective ecological ***:A Poisson generalized linear model combined with a distributed lag non-linear model was used to examine the relationship between relative humidity and childhood hFMD in a temperate Chinese city during ***:The effect of relative humidity on childhood hFMD increased above a humidity of 84%,with a 0.34%(95% CI:0.23%-0.45%) increase of childhood hFMD per 1% increment of relative ***,urban children,male children,and children aged 0-4 years appeared to be more vulnerable to the effect of relative humidity on ***:This article study indicates that high relative humidity may trigger childhood hFMD in a temperate area,hefei,particularly for those who are young and from urban areas.

关键词： Climatic change hand,foot,and mouth disease Relative humidity Rural Urban