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Adaptive data-driven parallelization of multi-view video coding on multi-core processor

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Science in China(Series F) 2009年第2期52卷 195-205页

作者： PANG Yi HU weidong SUN LiFeng yang ShiQiang Department of Computer Science and Technology Tsinghua University Beijing 100084 China

Multi-view video coding （MVC） comprises rich 3D information and is widely used in new visual media, such as 3DTV and free viewpoint TV （FTV）. However, even with mainstream computer manufacturers migrating to multi-core processors, the huge computational requirement of MVC currently prohibits its wide use in consumer markets. In this paper, we demonstrate the design and implementation of the first parallel MVC system on Cell Broadband Engine^TM processor which is a state-of-the-art multi-core processor. We propose a task-dispatching algorithm which is adaptive data-driven on the frame level for MVC, and implement a parallel multi-view video decoder with modified H.264/AVC codec on real machine. This approach provides scalable speedup （up to 16 times on sixteen cores） through proper local store management, utilization of code locality and SIMD improvement. Decoding speed, speedup and utilization rate of cores are expressed in experimental results.

关键词： adaptive data-driven multi-view video coding Cell Broadband Engine^TM Processor parallelization

Numerical Simulation of Multi-Layer Penetration Process of Binder Droplet in 3DP Technique

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Computer Modeling in Engineering & Sciences 2020年第7期124卷 227-241页

作者： Xiangyu Gao weidong yang Hongxuan Xian Xiyuan Tu Yuanyuang Wang School of Mechanical Engineering Hebei University of TechnologyTianjin300130China

This paper studies the binder droplet injection process in the 3DP *** mathematical model of the binder penetration process for multi-nozzle and multi-layer in 3DP technique is established,by using the conservation Level set *** to the two-dimensional plane model of three-dimensional spatial structure of sand bed,the construction method of an equivalent cylindrical mapping infiltration model is proposed to represent the porosity of the model in the two-dimensional plane,which is exactly the same as that in the three-dimensional space,as well as closer to the arrangement of the three-dimensional space,and to realize the differentiation between the pores and the *** method of spraying droplets alternately by multiple nozzles simulates the staggered arrangement of multiple array-type nozzles and prints the current layer completely at one *** numerical simulation of multi-layer penetration process is realized by using the method of continuous *** simulation model of the binder penetration process by using multi-nozzle and multi-layer is established to simulate the whole process of the binder from the nozzle to impacting on the sand bed and then to penetrating into the sand bed,which reflects the complete penetration process and predicts the sand agglomeration.

关键词： Additive manufacturing binder penetration numerical simulation

Influence of smoke, heat and fire on germination of woody species occurring in the dry valleys of southwest China

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Journal of Plant Ecology 2019年第6期12卷 931-940页

作者： Mareike Roeder weidong yang Kyle W.Tomlinson Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMenglaYunnan 666303China Institute of Floodplain Ecology Karlsruhe Institute of TechnologyJosefstraße 1D–76437 RastattGermany

Aims Savannahs depend on fire for their *** influences regeneration from seeds in several ways:it converts the environment into a more open space which can benefit the establishment of seedlings,and fire itself can also enhance germination by chemical and physical cues,such as smoke and *** is limited information as to how seed of Asian savannah species respond to fire,even though Asia has several dry vegetation types that are associated with *** main question was whether fire enhances or triggers the germination of woody species occurring in southwest Chinese dry valleys,which have savannah *** We conducted tests with heat(80°C)and smoke solution treatments,and tests with real fire by burning grass on top of sand trays containing *** tested 35 species,including savannah species,and gully and forest *** on seed availability,not all species were tested for all ***-six species had total germination>4%and these were used for *** Findings Heat increased germination of three species(strongest reaction:Dodonaea viscosa),smoke increased germination of five species(strongest reaction:Calotropis gigantea).Both treatments decreased germination for five and seven species,*** fire was detrimental for most species,except for ***,which is known to respond positively to heat *** though fire-related cues were not a trigger for germination for most species in our study,fire could still be crucial for regeneration by competition release.

关键词： smoke water burning biomass germination time Dodonaea viscosa Calotropis gigantea seed mass water content dark germination

Experimental research on rotating detonation with liquid hypergolic propellants

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Chinese Journal of Aeronautics 2018年第12期31卷 2199-2205页

作者： Shuaijie XUE Hongjun LIU Lixin ZHOU weidong yang Hongbo HU Yu YAN Science and Technology on Liquid Rocket Engine Laboratory Xi'an Aerospace Propulsion Institute

This paper describes experimental research into the initiation and propagation of rotating detonation for liquid Nitrogen TetrOxide(NTO) and liquid MonoMethylHydrazine(MMH).An annular rocket-type combustor without nozzle was designed to investigate detonation combustion. The propellants were injected through unlike impingement injectors. The combustion flame fronts and pressure waves were detected using optical diagnostics and dynamic pressure sensors,respectively. The propagation of rotating detonation was established spontaneously by increasing the mass flow rate of propellants. The velocity of propagation of the flame fronts and pressure waves was nearly equal and reaches supersonic speed. Two different detonation combustion patterns are present, single wave mode and double waves mode. And in double waves mode, the two detonation waves are always counter-rotating. The possibility of rotating detonation initiation in a combustor with nozzle was also checked. Stable rotating detonation can be initialized and sustained at similar operating conditions.

关键词： Hypergolic Initiation Liquid propellant Nozzle Rotating detonation

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基于WRF模式的康定地区风吹雪易发性判断

石家庄铁道大学学报（自然科学版） 2024年第1期37卷 87-93页

作者：周雪杨伟栋张珍刘庆宽石家庄铁道大学土木工程学院河北石家庄050043 石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室河北石家庄050043 河北省风工程和风能利用工程技术创新中心河北石家庄050043

为给通过地形复杂,缺少气象资料的西南艰险山区的铁路研究风吹雪易发性提供方法,以位于该区域的四川省康定市为例,采用中尺度数值天气预报模式(The Weather Research and Forecasting Mode,WRF)对该区域气象要素的时空分布进行模拟.基于... 详细信息

为给通过地形复杂,缺少气象资料的西南艰险山区的铁路研究风吹雪易发性提供方法,以位于该区域的四川省康定市为例,采用中尺度数值天气预报模式(The Weather Research and Forecasting Mode,WRF)对该区域气象要素的时空分布进行模拟.基于WRF模式中各种参数的特点,设计4种参数方案进行计算,采用双层网格嵌套达到降尺度模拟,为了高精度解析大气边界层过程,在竖直方向、近地面1.5km高度内加密为15层,提取康定站计算结果与观测结果进行比较.结果表明,WRF模式的计算结果符合康定市气候特征,气象要素的相关系数均高于0.5;风吹雪发生概率从高到低的区域依次为康定市东部和南部边缘的贡嘎山区,内部的大雪山段,以及位于101.7°E~102.0°E位置处的铁路线路,概率分别为19%、14%和12%,其他区域的概率低于4%.

关键词：铁路灾害防治风吹雪易发性判断数值模拟 WRF模式参数化方案

护士主导的肠内营养耐受性分级管理模式在重度烧伤患者康复护理中的效果

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中西医结合护理（中英文） 2024年第3期10卷 88-90页

作者：刘培聪师静沈晴杨卫东徐州仁慈医院江苏徐州221000

目的探究护士主导的肠内营养耐受性分级管理模式在重度烧伤患者康复护理中的效果。方法以2021年2月至2022年12月徐州仁慈医院收治的84例重度烧伤患者为研究对象,并就其临床资料开展回顾性分析,根据护理方法的不同将入选患者分为2组,各4... 详细信息

目的探究护士主导的肠内营养耐受性分级管理模式在重度烧伤患者康复护理中的效果。方法以2021年2月至2022年12月徐州仁慈医院收治的84例重度烧伤患者为研究对象,并就其临床资料开展回顾性分析,根据护理方法的不同将入选患者分为2组,各42例。对照组采用常规肠内营养管理模式,观察组采用护士主导的肠内营养耐受性分级管理模式。比较2组患者的干预效果。结果干预3周后,观察组的血清总蛋白和白蛋白水平均高于对照组,体重均重于对照组,外周血T淋巴细胞亚群CD3^(+)、CD4^(+)、CD8^(+)和CD4^(+)/CD8^(+)水平均高于对照组(P均<0.05);相较于干预前,2组的上述营养指标和免疫指标均更优(P均<0.05)。观察组的创面愈合时间和住院时间均较对照组更短,肠内营养不耐受反应总发生率较对照组更低(P均<0.05)。结论将护士主导的肠内营养耐受性分级管理模式应用于重度烧伤患者的康复护理中,有助于改善营养状况,提升免疫功能,促进创面恢复和缩短住院时间,并降低肠内营养不耐受反应发生率。

关键词：重度烧伤护士主导肠内营养耐受性分级管理模式康复护理营养状况

Surface modification of the TiO2 particles induced by γ irradiation

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Nuclear Science and Techniques 2013年第B12期24卷 33-37页

作者： LI Zhi QI Xiangzhi GE Xueping yang Cunzhong FANG Bin ZHANG weidong yang Xiangmin Institute of Nuclear Radiation Application School of Science East China University of Science and Technology Shanghai 200237 China

The surface of anatase TiO2 was modified by maleic andydride (MAH) γ radiation. The properties of surface modified TiO2 were investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT IR), X-ray photoelectron spectrum (XPS), thermal gravimetric analysis (TGA), as well as transmission electron microscopy (TEM). The results suggest that the MAH anchored on the surface of TiO2 through chemical bonding and the grafting ratio was approximately 2.7%. TEM image revealed that the modified particles had good dispersibility and compatibility with N,N-Dimethylformamide(DMF), which facilitated to hinder the aggregation of TiO2 particles. © 2013, Science Press. All rights reserved.

关键词：二氧化钛粒子表面修饰傅里叶变换红外光谱 X射线光电子能谱 N-二甲基甲酰胺 TiO2颗粒透射电子显微镜诱导

溶液堆过量放射性释放风险的PSA事件树研究

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核动力工程 2024年第5期45卷 177-183页

作者：邹志强张丹刘余王宁宁孙洪平王喆杨未东都昱中国核动力研究设计院先进核能技术全国重点实验室成都610213 生态环境部核与辐射安全中心北京100082

溶液型医用同位素试验堆(简称溶液堆)的设计特点和安全特性与传统固体燃料压水堆存在显著差异,概率安全分析(PSA)的目的和范围也不相同,尤其是事件树分析。本文以溶液堆为研究对象,分析了其燃料形态、安全屏障及缓解系统等与传统压水堆... 详细信息

溶液型医用同位素试验堆(简称溶液堆)的设计特点和安全特性与传统固体燃料压水堆存在显著差异,概率安全分析(PSA)的目的和范围也不相同,尤其是事件树分析。本文以溶液堆为研究对象,分析了其燃料形态、安全屏障及缓解系统等与传统压水堆的差异,确定了以过量放射性释放为分析目的的内部事件PSA需要考虑的放射性释放途径、包容边界以及主要的事故类型,建立了典型事故类的过量放射性释放通用事件树,可为该类型反应堆放射性释放风险PSA的开展和进一步的风险定量化提供指导。

关键词：溶液型医用同位素试验堆(简称溶液堆) 概率安全分析(PSA) 内部事件PSA 事件树过量放射性释放

Research of MPLS traffic engineering over differentiated services

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Journal of University of Science and Technology Beijing 2002年第6期9卷 474-477页

作者： yang Hu, yang yang, and weidong HaoInformation Engineering School, University of Science and Technology Beijing, Beijing 100083, China Univ Sci & Technol Beijing Sch Informat Engn Beijing 100083 Peoples R China

An approach to traffic engineering that uses differentiated services (DS) andmulti-protocol label switching (MPLS) to provide quantitative network quality of service (QoS)guarantees over an IP network was proposed. The traffic associated with assured forwarding (AF)Per-Hop behavior (PHB) in differentiated services enabled IP network was modeled. Furthermore, theeffect of such traffic on network resources with die objective of developing efficient trafficengineering methodologies was analyzed and the optimization problem relating to traffic engineeringin DS networks with an MPLS core was formulated. The service received by TCP and UDP flows when theyshare either a link or a MPLS traffic trunk was also compared and found that in order to benefitfrom traffic engineering, MPLS trunks should be implemented end-end (first router to last router).If some part of the network is MPLS trunk-unaware, the benefits are reduced or eliminated.

关键词： MPLS differentiated services QoS traffic engineering