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Learning discrete adaptive receptive fields for graph convolutional networks

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Science China(Information Sciences) 2023年第12期66卷 5-15页

作者： Xiaojun MA Ziyao LI Guojie song chuan SHI School of Intelligence Science and Technology Peking University School of Computer Science Beijing University of Posts and Telecommunications

Different nodes in a graph neighborhood generally yield different importance. In previous work of graph convolutional networks(GCNs), such differences are typically modeled with attention ***, as we prove in our paper, soft attention weights suffer from undesired smoothness large neighborhoods(not to be confused with the oversmoothing effect in deep GCNs). To address this weakness, we introduce a novel framework of conducting graph convolutions, where nodes are discretely selected among multi-hop neighborhoods to construct adaptive receptive fields(ARFs). ARFs enable GCNs to get rid of the smoothness of soft attention weights, as well as to efficiently explore long-distance dependencies in *** further propose GRARF(GCN with reinforced adaptive receptive fields) as an instance, where an optimal policy of constructing ARFs is learned with reinforcement learning. GRARF achieves or matches state-of-theart performances on public datasets from different domains. Our further analysis corroborates that GRARF is more robust than attention models against neighborhood noises.

关键词： graph neural networks receptive field reinforcement learning

基于时间感知主导资源公平的边缘函数计算负载调度算法

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计算机工程与科学 2024年第10期46卷 1711-1719页

作者：李宝朱姝王晓川任怡谭郁松国防科技大学计算机学院湖南长沙410073

针对边缘函数计算服务FaaS中不同负载之间资源抢占导致的资源分配不公平、利用率不高的问题,提出一种时间感知的主导资源公平调度算法。首先,分析了现有主导资源公平调度算法在应用到边缘函数计算服务时的不足;其次,提出加入函数实例运... 详细信息

针对边缘函数计算服务FaaS中不同负载之间资源抢占导致的资源分配不公平、利用率不高的问题,提出一种时间感知的主导资源公平调度算法。首先,分析了现有主导资源公平调度算法在应用到边缘函数计算服务时的不足;其次,提出加入函数实例运行时间权重,并通过时间感知队列和主导资源公平队列协同实现对函数运行所需要的资源进行公平分配和集群资源充分利用;最后,基于主流开源函数计算服务平台的调度器对算法进行了实现。采用公开负载运行数据集的测试结果表明,该算法最多提升了18.1%的CPU利用率和21.8%的内存利用率,并且执行时间最多降低了26.1%,能够有效提升边缘函数计算服务的资源分配公平性,且提高了资源利用率。

关键词：边缘计算函数计算服务时间感知主导资源公平调度

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Recent development in quantum communication

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Chinese Science Bulletin 2012年第36期57卷 4694-4700页

作者： song SiYu WANG chuan State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Tsinghua National Laboratory for Information Science and Technology Tsinghua UniversityBeijing 100084China School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

In this review article,we will review the recent process of quantum *** the past decades,there are many developments in quantum communication,for instance,quantum key distribution,quantum teleportation,quantum secure direct communication,deterministic secure quantum communication,quantum secret sharing and so *** we focus our attention on the recent developments in quantum communication protocols.

关键词：量子通信量子密钥分配量子秘密共享隐形传输通信协议量子态注意力安全

Impact of EBV infection and immune function assay for lymphoproliferative disorder in pediatric patients after liver transplantation: A single-center experience

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Hepatobiliary & Pancreatic Diseases International 2020年第1期19卷 3-11页

作者： Tian Qin Xiang-Qian Gu Seog-song Jeong Yan-Yan song jin-chuan Liu Jian-Xin Zheng Feng Xue Qiang Xia Department of Liver Surgery Renji HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai 200127China Department of Biostatistics Institute of Medical SciencesShanghai Jiaotong University School of MedicineShanghai 200025China

Background:Post-transplant lymphoproliferative disorder(PTLD)is a lethal complication after pediatric liver transplantation,but information regarding risk factors for the development of PTLD remains *** study was to identify characteristics and risk factors of ***:A total of 705 pediatric patients who underwent liver transplantation between January 2017 and October 2018 were *** of clinical characteristics and Epstein-Barr virus(EBV)infection on the development of PTLD was *** addition,ImmuKnow assay was adopted in partial patients to analyze the immune ***:Twenty-five(3.5%)patients suffered from PLTD with a median time of 6 months(3–14 months)after *** high tacrolimus(TAC)level was found in 2 fatal cases at PTLD *** infection was found in 468(66.4%)patients.A higher peak EBV DNA loads(>9590 copies/mL)within 3 months was a significant indicator for the onset of *** addition,the ImmuKnow assay demonstrated that overall immune response was significantly lower in patients with EBV infection and PTLD(P<0.0001).The cumulative incidence of PTLD was also higher in patients with lower ATP value(≤187 ng/mL,P<0.05).Conclusions:A careful monitoring of EBV DNA loads and tacrolimus concentration might be supportive in prevention of PTLD in pediatric patients after liver *** addition,application of the ImmuKnow assay may provide guidance in reducing immunosuppressive agents in treatment of PTLD.

关键词： Post-transplant lymphoproliferative disor Pediatric liver transplantation Epstein-Barr virus

千岛湖外来物种蓝鳃太阳鱼的生活史特征及适应性

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水生生物学报 2024年第9期48卷 1541-1552页

作者：马玉兴梁智策文峰廖传松盘家永邵建强何光喜刘家寿郭传波大连海洋大学大连116023 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室武汉430072 中国科学院大学北京100049 杭州千岛湖发展集团有限公司淳安311700

为研究蓝鳃太阳鱼(Lepomis macrochirus)种群生活史特征及适应性,以千岛湖蓝鳃太阳鱼种群为研究对象,于2021年3月至2023年1月逐月采集样本共3484尾,系统研究了蓝鳃太阳鱼年龄、生长、繁殖和死亡等生活史特征及适应性。结果表明:千岛湖... 详细信息

为研究蓝鳃太阳鱼(Lepomis macrochirus)种群生活史特征及适应性,以千岛湖蓝鳃太阳鱼种群为研究对象,于2021年3月至2023年1月逐月采集样本共3484尾,系统研究了蓝鳃太阳鱼年龄、生长、繁殖和死亡等生活史特征及适应性。结果表明:千岛湖蓝鳃太阳鱼的种群平均体长为(88±0.6)mm,平均体重为(30.42±0.53)g。其种群年龄结构简单,1—2龄的低龄个体占优势(83.97%)。通过拟合幂函数方程得到体长与体重关系式为BW=1×10^(–5)SL^(3.1543)(N=3484,R^(2)=0.97)。另外,千岛湖蓝鳃太阳鱼具有明显的雌雄异形现象,其繁殖季节为4—9月,绝对繁殖力为(11405±921)粒/尾,相对繁殖力为(282±14)粒/g,平均卵径为(0.74±0.003)mm。最后,利用Pauly经验公式和长度变换渔获曲线法分别估算出:自然死亡系数(M)为1.05,总死亡系数(Z)为3.58,捕捞死亡系数(F)为2.53,种群开发率(E)为0.71。综上,千岛湖蓝鳃太阳鱼的种群呈现出典型的r生活史对策,整体种群数量呈上升趋势,种群规模具有进一步扩张的潜在风险,亟需相应的管理和控制。与原产地北美及其他入侵地的种群相比,蓝鳃太阳鱼在繁殖时间及早期生长速度等的改变是其成功入侵千岛湖的关键适应性特征。研究结果补充了国内有关蓝鳃太阳鱼的种群生长特性、年龄结构和繁殖特征等基础资料,揭示了其在千岛湖入侵成功的适应性机制,为我国蓝鳃太阳鱼的入侵防控提供了重要的理论依据。

关键词：千岛湖蓝鳃太阳鱼生物入侵生活史策略适应性特征

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2.45GHz ECR强流等离子体源核心部件设计与实验研究

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原子与分子物理学报 2024年第5期41卷 94-100页

作者：李钢陈根段文学彭标尉传颂安徽建筑大学电子与信息工程学院合肥230601 中国科学院合肥物质研究院等离子体物理研究所合肥230031 安徽大学物质科学与信息技术研究院合肥230601 合肥中科离子医学技术装备有限公司合肥230088

电子回旋共振(Electron Cyclotron Resonance,ECR)等离子体源能产生高电荷态离子、高流强的单电荷态离子,提供稳定的束流和良好的重复性.核心部件的设计对ECR等离子体源是至关重要的,磁场对等离子体的生成和分布有直接影响,良好的磁场... 详细信息

电子回旋共振(Electron Cyclotron Resonance,ECR)等离子体源能产生高电荷态离子、高流强的单电荷态离子,提供稳定的束流和良好的重复性.核心部件的设计对ECR等离子体源是至关重要的,磁场对等离子体的生成和分布有直接影响,良好的磁场可以提高等离子体的性能和效率.采用有限元分析方法对ECR等离子体源磁场进行分析与设计,得到了满足设计需求与目标的磁场位形,通过高斯计对设计的永磁环轴向磁场精确测量,发现磁场仿真结果与实验结果吻合比较好,只是轴向磁场最大值及对应位置上有点偏差.通过集成实验,研究核心部件对离子源引出束流强度的影响,引出束流稳定且强度达到7 mA.

关键词： ECR等离子体源磁场设计引出束流

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A new triterpenoid from Kadsura coccinea

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Chinese Chemical Letters 2010年第11期21卷 1352-1354页

作者： Yan song Qing Jie Zhao Yong Sheng jin chuan Wei Feng Hai Sheng Chen Department of Phytochemistry School of Pharmacy Second Military Medical University Shanghai 200433 China Department of Organic Chemistry School of Pharmacy Second Military Medical University Shanghai 200433 China

A new triterpenoid,possessing a lanost-9（11）-3-one skeleton,was isolated from the roots of Kadsura coccinea,based on the spectral analysis,its structure was elucidated as 3-hydroxy-12-acetoxycoccinic acid.

关键词： Kadsura coccinea Triterpene Coccinic acid

Trace determination of hexabromocyclododecane diastereomers in water samples with temperature controlled ionic liquid dispersive liquid phase microextraction

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Chinese Chemical Letters 2011年第1期22卷 97-100页

作者： Ru song Zhao Xia Wang jin Peng Yuan Shan Shan Wang chuan Ge Cheng Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province Analysis and Test Center Shandong Academy of Sciences Jinan 250014 China

A novel temperature controlled ionic liquid dispersive liquid phase microextracfion （TCIL-DLPME） coupled with rapid resolution liquid chromatography-electrospray tandem mass spectrometry （RRLC-ESI-MS-MS） has been developed for the enrichment and determination of three hexabromocyclododecane diastereomers （HBCDs） in water samples. Green solvent ionic liquid （IL） was used as extraction solvent instead of toxic organic solvents. This technique also avoided the usage of dispersive solvent. Some important parameters that might affect the extraction efficiency were optimized. Under the optimum conditions, good linear relationship, sensitivity and reproducibility were obtained. All the limits of detection for the three diastereomers were 0.1 ng/ mL. The linear range was obtained in the range of 1-100 ng/mL for the total amount of three HBCD diastereomers. It was satisfactory to analyze real environmental water samples with the recoveries ranging from 77.2% to 99.3%. The main advantage of the method is toxic organic solvent-free.

关键词： Hexabromocyclododecane Temperature controlled ionic liquid dispersive liquid phase microextraction Rapid resolution liquidchromatography-electrospray tandem mass spectrometry

低温对含盐食品污水深度处理性能与微生物群落的影响

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水处理技术 2024年第1期50卷 42-46,54页

作者：杨英柏松罗玲何静徐丽萍邓川四川化工职业技术学院川酒学院四川泸州646300 天然产物与功能性食品泸州市重点实验室四川泸州646000 广汉市农业农村局四川广汉638000

固体碳源被广泛应用于污水深度处理,但是低温条件下对含盐食品污水的处理性能还缺乏评估,微生物特性也需要揭示。以聚丁二酸丁二醇酯为固体碳源,考察了不同温度条件下的脱氮性能、微生物群落结构以及基因富集特征。结果表明:常温(25~28... 详细信息

固体碳源被广泛应用于污水深度处理,但是低温条件下对含盐食品污水的处理性能还缺乏评估,微生物特性也需要揭示。以聚丁二酸丁二醇酯为固体碳源,考察了不同温度条件下的脱氮性能、微生物群落结构以及基因富集特征。结果表明:常温(25~28℃)条件下的固体碳源反应器出水可以满足《污水综合排放标准》一级标准。低温(5~9℃)对脱氮性能抑制显著,NH_(4)^(+)-N、NO_(3)^(-)-N去除率仅为30.17%、73.51%,并且运行初期存在出水有机物超标的风险。固体碳源体系中unclassified_Comamonadaceae、Acidovorax分别是主要的硝化、反硝化菌属,但容易受低温影响而丰度降低。此外,温度降低还会导致硝化基因(amoA、amoB、amoC)和反硝化基因(narG、narH、narI)丰度降低。

关键词：外加碳源尾水处理低温脱氮性能微生物群落结构