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Mechanical properties and microstructure of in situ formed Ti_(2)AlN/TiAl(WMS)composites

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Rare Metals 2021年第1期40卷 190-194页

作者： wan-liang liang Rui Hu Yi-Wen Liu Tie-Bang Zhang Jin-Shan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

The Ti_(2)AlN-reinforced TiAl(WMS)composites with different contents of Ti_(2)AlN were prepared by an in situ method of reactive arc-melting *** to the results of X-ray diffraction(XRD)analysis,the Ti_(2)AlNreinforced WMS composites consist ofγ-TiAl,α_(2)-Ti_(3)Al,and Ti_(2)AlN *** analysis results indicate that Ti_(2)AlN reinforcements with rod-like in shape form in the WMS matrix with aα_(2)/γlamellar structure containing some bulk y *** volume fraction of Ti_(2)AlN increasing,the grain size of the composites decreases significantly and the elasticity modulus(E)*** compressive strength and compressive fracture strain of the composite with 3 vol%Ti_(2)AlN have a maximum value of 1,654 MPa and 22.5%,respectively,which are approximately improved by 45.84%and 29.31%,respectively,compared with that of the unreinforced WMS alloy.

关键词： Ti_(2)AlN/TiAl(WMS)composites Reactive arc-melting Microstructure Compressive properties

Low Overhead and Fast Reaction Adaptive Clocking System for Voltage Droop Tolerance

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Chinese Journal of Electronics 2019年第3期28卷 503-507页

作者： SHANG Xinchao SHAN Weiwei XIANG Yiming wan liang FAN Ao National ASIC System Engineering Research Center Southeast University

Variation in on-chip power supply continues to be a major challenge to limit circuit performance. To mitigate the impact of high-frequency voltage droop, a novel all-digital adaptive clock system is proposed. The adaptive clock system is composed of a droop detector and an adaptive clock generator, which directly stretch the clock period when the circuit suffers from the supply voltage droop. The droop detector circuit detects the VDD droop and the digital adaptive clock generator circuit selects the stretched clock to prevent timing-margin failures. The response time for droop detection and clock stretch can be as fast as one cycle. The whole scheme is used on a test circuit under SMIC 40 nm CMOS process with a layout area of 900 um*1100 um. Postlayout simulation results demonstrate power reductions are 7% at 1.1 V and 15% at 0.7 V for a 10% VDD droop,respectively.

关键词： Voltage droop Adaptive clock system Droop detector Adaptive clock generator

DBKEM-AACS: a distributed key escrow model in blockchain with anonymous authentication and committee selection

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Science China(Information Sciences) 2023年第3期66卷 289-290页

作者： Axin XIANG Hongfeng GAO Youliang TIAN liang wan College of Computer Science and Technology Guizhou University Institute of Cryptography and Data Security Guizhou University Network and Information Management Center Guizhou University State Key Laboratory of Public Big Data Guizhou University Institute of Computer Software and Theory Guizhou University

Dear editor, Key security is of great practical significance and demand to guarantee the security of digital assets in the blockchain system. At present, users prefer to escrow their assets on centralized institutions, but this phenomenon has gone against the unique characteristics of decentralization and anonymity in the blockchain. Among them, the suspense incidents of assets lock or lost are enough to prove that the security of escrowed keys on the exchanges is questionable.

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Three-Dimensional Morphology and Growth Behavior of Ferrite Allotriomorphs Formed at Grain Boundary Edges

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Journal of Iron and Steel Research International 2010年第11期17卷 49-53页

作者： wan Xiang-liang CHENG Lin WU Kai-ming International Research Institute of Steel Technology Wuhan University of Science and Technology Wuhan 430081 Hubei China

Three-dimensional morphology of ferrite allotriomorphs nucleated at grain boundary edges in low carbon steel was revealed by means of serial sectioning in conjunction with computer-aided three-dimensional reconstruction techniques. The typical morphology of them was of an elongated triangular pyramid. The length, width and thickness of ferrite allotriomorphs were measured on the basis of three-dimensional reconstructed images. The aspect ratio （length/width） of them was 4.5 on an average and scattered from 3 to 6. The measured sizes were smaller than calculated ones, which was probably attributed to solute drag-like effect of manganese in the alloy.

关键词： steels ferrite allotriomorph three-dimensional morphology growth kinetics

The prognostic impact of traditional Chinese medicine monomers on tumor-associated macrophages in non-small cell lung cancer

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Chinese Journal of Natural Medicines 2019年第10期17卷 729-737页

作者： wan liang-Qin TAN Yan JIANG Miao HUA Qian School of Acupuncture-Moxibustion and Tuina Beijing University of Chinese MedicineBeijing 100029China Dongzhimen Hospital Beijing University of Chinese MedicineBeijing 100029China

Non-small cell lung cancer(NSCLC) accounts for 80%-85% of all lung malignancies and good diagnosis and prognosis of NSCLC are critical to the increase of its survival rate. Tumor-associated macrophages(TAM) abundantly present in numerous cancer types, and the role of TAMs in tumor biology and their prognostic value in cancer become major topics of interest. After various stimulations in the tumor microenvironment, TAMs develop into a M1(tumor-inhibitory) phenotype or M2(tumor-promoting) phenotype. Recent studies show that traditional Chinese medicine(TCM) monomers have markedly inhibitory actions for NSCLC through M1/M2 modulation. Due to the TCM monomers mainly covered five categories, i.e. terpenoids, flavonoids, polysaccharides, natural polyphenols, and alkaloids. Thus, we will discuss the regulation of TCM monomers on TAM involve in these five parts in this review. In addition, the potential role of TAMs as therapeutic targets will be discussed.

关键词： Lung cancer Tumor microenvironment Tumor-associated macrophages Traditional Chinese medicine (TCM) monomer Immunotherapy

Multi-scale context-aware network for continuous sign language recognition

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虚拟现实与智能硬件（中英文） 2024年第4期6卷 323-337页

作者： Senhua XUE Liqing GAO liang wan Wei FENG College of Intelligence and Computing Tianjin UniversityTianjin 300354China

The hands and face are the most important parts for expressing sign language morphemes in sign language ***,we find that existing Continuous Sign Language Recognition(CSLR)methods lack the mining of hand and face information in visual backbones or use expensive and time-consuming external extractors to explore this *** addition,the signs have different lengths,whereas previous CSLR methods typically use a fixed-length window to segment the video to capture sequential features and then perform global temporal modeling,which disturbs the perception of complete *** this study,we propose a Multi-Scale Context-Aware network(MSCA-Net)to solve the aforementioned *** MSCA-Net contains two main modules:(1)Multi-Scale Motion Attention(MSMA),which uses the differences among frames to perceive information of the hands and face in multiple spatial scales,replacing the heavy feature extractors;and(2)Multi-Scale Temporal Modeling(MSTM),which explores crucial temporal information in the sign language video from different temporal *** conduct extensive experiments using three widely used sign language datasets,i.e.,RWTH-PHOENIX-Weather-2014,RWTH-PHOENIX-Weather-2014T,and *** proposed MSCA-Net achieve state-of-the-art performance,demonstrating the effectiveness of our approach.

关键词： Continuous sign language recognition Multi-scale motion attention Multi-scale temporal modeling

In situ observation of austenite grain growth behavior in the simulated coarse-grained heat-affected zone of Ti-microalloyed steels

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International Journal of Minerals,Metallurgy and Materials 2014年第9期21卷 878-885页

作者： Xiang-liang wan Kai-ming Wu Gang Huang Ran Wei Lin Cheng The State Key Laboratory of Refractories and Metallurgy Hubei Collaborative Innovation Center for Advanced Steels Wuhan University of Science and Technology

The austenite grain growth behavior in a simulated coarse-grained heat-affected zone during thermal cycling was investigated via in situ observation. Austenite grains nucleated at ferrite grain boundaries and then grew in different directions through movement of grain boundaries into the ferrite phase. Subsequently, the adjacent austenite grains impinged against each other during the α→γtransformation. After the α→γ transformation, austenite grains coarsened via the coalescence of small grains and via boundary migration between grains. The growth process of austenite grains was a continuous process during heating, isothermal holding, and cooling in simulated thermal cycling. Abundant finely dispersed nanoscale TiN particles in a steel specimen containing 0.012wt% Ti effectively retarded the grain boundary migration, which resulted in refined austenite grains. When the Ti concentration in the steel was increased, the number of TiN particles de- creased and their size coarsened. The big particles were not effective in pinning the austenite grain boundary movement and resulted in coarse austenite grains.

关键词： alloy steel austenite grain growth heat-affected zone coarsening titanium nitride

An Adaptive and Opportunistic Broadcast Protocol for Vehicular Ad Hoc Networks

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International Journal of Automation and computing 2012年第4期9卷 378-387页

作者： Li, Gui-Sen wang, wan-liang Yao, Xin-Wei College of Computer Science and Technology Zhejiang University of Technology Hangzhou 310023 China

A primary goal of broadcasting in vehicular ad hoc network (VANET) is to improve the road safety by transmitting alert messages to all surrounding vehicles as soon as possible. In this paper, we adopt the concept of opportunistic routing and propose a multiple candidate relays opportunistic broadcast (MCROB) protocol for VANET. The MCROB protocol is a sender-driven broadcast scheme independent of node density. The packet delivery ratio (PDR) is derived and an expected transmission speed (ETS) for the MCROB is proposed. A priority rule for selecting a proper candidate relay and an adaptive algorithm for forwarding timers of candidate relays are also presented in this paper. Simulations show that MCROB is adaptive to the rapid changing of network conditions. It keeps a low communication overhead introduced by the broadcast and increases the average transmission speed by around 40%.

关键词： Broadcast storm opportunistic broadcast multiple candidates transmission speed vehicular ad hoc network (VANET).

Research on Some Bus Transport Networks with Random Overlapping Clique Structure

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Communications in Theoretical Physics 2008年第11期50卷 1249-1254页

作者： YANG Xu-Hua wanG Bo wanG wan-liang SUN You-Xian State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China College of Information Engineering Zhejiang University of Technology Hangzhou 310032 China

On the basis of investigating the statistical data of bus transport networks of three big cities in China,wepropose that each bus route is a clique(maximal complete subgraph)and a bus transport network(BTN)consists of alot of cliques,which intensively connect and overlap with each *** study the network properties,which includethe degree distribution,multiple edges' overlapping time distribution,distribution of the overlap size between any twooverlapping cliques,distribution of the number of cliques that a node belongs ***,the cliques also constitute anetwork,with the overlapping nodes being their multiple *** also research its network properties such as degreedistribution,clustering,average path length,and so *** propose that a BTN has the properties of random cliqueincrement and random overlapping clique,at the same time,a BTN is a small-world network with highly clique-clusteredand highly ***,we introduce a BTN evolution model,whose simulation results agree well withthe statistical laws that emerge in real BTNs.

关键词： random clique increment random overlapping clique clique clustered bus transport network