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Scaling out NUMA-Aware Applications with RDMA-Based Distributed Shared Memory

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Journal of Computer Science & Technology 2019年第1期34卷 94-112页

作者： yang hong yang Zheng Fan yang Bin-Yu Zang Hai-Bing Guan Hai-Bo Chen Shanghai Key Laboratory for Scalable Computing Systems Shanghai Jiao Tong UniversityShanghai 200240China

The multicore evolution has stimulated renewed interests in scaling up applications on shared-memory multiprocessors,significantly improving the scalability of many *** the scalability is limited within a single node;therefore programmers still have to redesign applications to scale out over multiple *** paper revisits the design and implementation of distributed shared memory (DSM)as a way to scale out applications optimized for non-uniform memory access (NUMA)architecture over a well-connected *** paper presents MAGI,an efficient DSM system that provides a transparent shared address space with scalable performance on a cluster with fast network *** is unique in that it presents a NUMA abstraction to fully harness the multicore resources in each node through hierarchical synchronization and memory *** also exploits the memory access patterns of big-data applications and leverages a set of optimizations for remote direct memory access (RDMA)to reduce the number of page faults and the cost of the coherence *** has been implemented as a user-space library with pthread-compatible interfaces and can run existing multithreaded applications with minimized *** deployed MAGI over an 8-node RDMA-enabled *** evaluation shows that MAGI achieves up to 9.25:4 speedup compared with an unoptimized implementation,leading to a sealable performance for large-scale data-intensive applications.

关键词： distributed shared memory (DSM) scalability multieore evolution non-uniform memory access (NUMA) remote direct memory access (RDMA)

Consensus of Multi-agent Systems Under Switching Agent Dynamics and Jumping Network Topologies

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International Journal of Automation and computing 2016年第5期13卷 438-446页

作者： Zhen-hong yang yang Song Min Zheng Wei-Yan Hou School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200072China Shanghai Key Laboratory of Power Station Automation Technology Shanghai 200072China School of Information Zhengzhou UniversityZhengzhou 450052China

Consensus of multi-agent systems is an interesting research topic and has wide applications in science and engineering. The agents considered in most existing studies on consensus problem are time-invariant. However, in many cases, agent dynamics often show the characteristic of switching during the process of consensus. This paper considers consensus problem of general linear multi-agent system under both switching agent dynamics and jumping network topologies. Within the proposed multi-agent system, the agent dynamic switching is assumed to be deterministic, while the network topology jumping is considered respectively for two cases： deterministic jumping （Case 1） and Markov jumping （Case 2）. By applying the dwell time and the average dwell time techniques, a sufficient consensus and an almost sure consensus conditions are provided for these two cases, respectively. Finally, two numerical examples are presented to demonstrate the theoretical results.

关键词： Multi-agent systems consensus switching agent dynamics switching topologies Markov process.

Adaptive robust dissipative designs on straight path control for underactuated ships

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Journal of Systems Engineering and Electronics 2006年第1期17卷 177-181页

作者： Li Tieshan yang Yansheng hong Biguang Navigation Coll. Dalian Maritime Univ. Dalian 116026 P. R. China

An adaptive robust control algorithm for ship straight path control system in the presence of both modeling uncertainties and the bounded disturbances is proposed. Motivated by the backstepping approach, the algorithm is developed by using the dissipation theory, such that the resulting dosed-loop system is both strictly dissipative and asymptotically adaptively stable for all admissible uncertainties. Also, it is able to steer an underactuated ship along a prescribed straight path with ultimate bounds under external disturbances induced by wave, wind and ocean current. When there are no disturbances, the straight path control can be implemented in a locally asymptotically stable manner. Simulation results on an ocean-going training ship ‘YULONG＇ are presented to validate the effectiveness of the algorithm.

关键词： underactuated ship straight path control nonlinear system adaptive backstepping design robust control.

Clean energy technology： materials, processes and devices for electrochemical energy conversion and storage

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Frontiers in Energy 2017年第3期11卷 233-235页

作者： hong yang Junliang ZHANG Baolian YI Department of Chemical & Biomolecular Engineering University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Institute of Fuel Cells School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Climate change is a major modern-day challenge that faces the human society. Developing clean energy technology requires near-term approaches and long- term strategy. A solution to meet the daunting challenge is for us to make a switch in energy use to various carbon-free, renewable sources. Due to the intermittency and geographical constraint of renewable energy supply, its broad application requires to develop smart energy storage and conversion technology. Distributed system, microgrid and clean vehicles are among the major society-level solutions that are actively considered. Electrochemical energy, if made in a highly efficient and clean manner, should greatly help in our ability to adapt to this change.

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Households Hunger:The Key Attribute to Anthropometric Failures of Children in West Oromia(Ethiopia)

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Current Medical Science 2020年第3期40卷 580-585页

作者： Wondu Garoma Berra Nian-hong yang Department of Nutrition&Food Hygiene Hubei Key Laboratory of Food Nutrition and SafetyMOE Key Laboratory of Environment and HealthSchool of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Nutrition Unit Wollega UniversityNekemteEthiopia

Poor nutrition is the underlying cause of child ***,comprehensive data showing the relationships between dietary-practices,food security,and nutritional status are *** present study aimed to examine the association of inappropriate feeding practices and household-hunger with anthropometric measures in children aged 6–23 months.A cross-sectional survey was conducted on randomly selected ***-structured interviewer-administered questionnaires were used to gather data on socio-demographic,child health,dietary-practices and *** and height/length of the children were measured and analyzed using the new World Health Organization(WHO)Growth *** prevalence of stunting,wasting and underweight as well as composite index of anthropometric failure(CIFA)were used to indicate *** overall prevalence of inappropriate feeding practices was 22.9%,rate of moderate households-hunger was 12.4%,and the prevalence of stunting,underweight and wasting was 16.2%,6.9%and 6.3%,respectively,while the CIAF was 21.3%.The prevalence was significantly higher in young children aged 12–23 months than in infants aged 6–11 *** from households experiencing moderate hunger had significantly higher risk of being stunting(OR:10.20;95%CI:2.00–51.50),underweight(OR:3.89;95%CI:1.40–10.90),wasting(OR:1.97;95%CI:0.99–3.90),and CIAF(OR:1.90;95%CI:1.05–3.45),than those residing in households experiencing no or mild ***-disciplinary approaches are required to improve household food-security and child dietary practices,thus the nutritional status among young children.

关键词： child dietary practices household hunger anthropometric failures West Oromia(Ethiopia)

残余胆固醇与进展为主要不良心血管事件的非罪犯病变易损斑块的相关性研究

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中国全科医学 2025年第3期28卷 299-304页

作者：杨红刘成刘森邵琪琪夭元昊付真彦新疆医科大学第一附属医院心脏中心新疆维吾尔自治区乌鲁木齐市830054

背景残余胆固醇(RC)被认为是动脉粥样硬化性心血管疾病的重要危险因素,而冠状动脉非罪犯病变(NCCLs)进展也是影响冠心病患者预后的重要因素,但是残余胆固醇与进展为主要不良心血管事件(MACE)的NCCLs易损斑块的关系尚不明确。目的探讨R... 详细信息

背景残余胆固醇(RC)被认为是动脉粥样硬化性心血管疾病的重要危险因素,而冠状动脉非罪犯病变(NCCLs)进展也是影响冠心病患者预后的重要因素,但是残余胆固醇与进展为主要不良心血管事件(MACE)的NCCLs易损斑块的关系尚不明确。目的探讨RC对发生MACE的NCCLs易损斑块的预测价值及长期预后的相关性。方法选取2015年2月—2022年2月于新疆医科大学第一附属医院心脏中心住院的488例冠心病患者为研究对象,通过电子病历系统收集患者基线资料,行冠状动脉造影及光学相干断层扫描OCT。入组患者在出院1、3、6和12个月接受预定随访。采用Spearman秩相关检验探究RC与NCCLs中薄纤维帽粥样硬化斑块(TCFA)斑块特征的相关性。采用多因素Logistic回归分析探究NCCLs中TCFA发生MACE的影响因素。绘制受试者工作特征曲线(ROC曲线)并计算ROC曲线下面积(AUC),探究RC对NCCLs中TCFA发生MACE的预测价值。结果共纳入488例冠心病患者,根据NCCLs是否发生MACE将患者分为发生MACE组(n=38)和未发生MACE组(n=450)。通过OCT识别NCCLs的斑块特征,共分析了749个NCCLs斑块,304个NCCLs斑块最小管腔面积(MLA)<3.5 mm^(2)。随访期间38例(7.8%)患者共发生了41例次NCCLs斑块引起的MACE事件,18例(3.7%)患者发生了支架内再狭窄,15例(3.1%)发生了不确定因素的死亡。发生MACE组患者高血压、糖尿病、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、RC、糖化血红蛋白(Hb A1c)、TCFA、MLA<3.5 mm^(2)比例高于未发生MACE组(P<0.05)。105例患者检查出TCFA,其中22例发生MACE(发生MACE的TCFA组),83例未发生MACE(未发生MACE的TCFA组)。发生MACE的TCFA组糖尿病比例与RC高于未发生MACE的TCFA组(P<0.05)。Spearman秩相关分析结果示,RC与最薄纤维帽厚度、MLA呈负相关(r_(s)=-0.665、-0.771,P<0.05),与最大脂质弧度、巨噬细胞浸润呈正相关(r_(s)=0.806、0.481,P<0.05)。多因素Logistic回归分析结果显示糖尿病(OR=3.410,95%CI=1.165~9.988,P=0.025)、高RC水平(OR=5.879,95%CI=1.436~24.073,P=0.014)是NCCLs中TCFA发生MACE的危险因素。绘制RC预测NCCLs中TCFA发生MACE的ROC曲线,结果显示AUC为0.695(95%CI=0.571~0.819,P=0.005),最佳截断值为0.606 mmol/L,灵敏度、特异度分别为0.818、0.518。结论 RC水平升高可能是冠心病患者中NCCLs易损斑块发生MACE的危险因素,对NCCLs中TCFA发生MACE有一定的预测价值。

关键词：冠心病冠状动脉粥样硬化血脂异常主要不良心血管事件冠状动脉非罪犯病变残余胆固醇相关性研究

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Cytochrome c and insect cell apoptosis

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Insect Science 2012年第1期19卷 30-40页

作者： Kai-Yu Liu hong yang Jian-Xin Peng Hua-Zhu hong Institute of Entomology Central China Normal University Wuhan Key Laboratory of Pesticide&Chemical Biology Ministry of EducationCentral China Normal University WuhanChina

The role ofcytochrome c in insect cell apoptosis has drawn considerable atten- tion and has been subject to considerable controversy. In Drosophila, the majority of studies have demonstrated that cytochrome c may not be involved in apoptosis, although there are conflicting reports. Cytochrome c is not released from mitochondria into the cytosol and activation of the initiator caspase Dronc or effector caspase Drice is not associated with cytochrome c during apoptosis in Drosophila SL2 cells or BG2 cells. Cytochrome c failed to induce caspase activation and promote caspase activation in Drosophila cell lysates, but remarkably caused caspase activation in extracts from human cells. Knockdown of cytochrome c does not protect cells from apoptosis and over-expression of cytochrome c also does not promote apoptosis. Structural analysis has revealed that cytochrome c is not required for Dapaf-1 complex assembly. In Lepidoptera, the involvement of cytochrome c in apoptosis has been demonstrated by the accumulating evidence. Cytochrome c re- lease from mitochondria into cytosol has been observed in different cell lines such as Spodoptera frugiperda Sf9, Spodoptera litura S1-1 and Lymantria dispar LdFB. Silencing of cytochrome c expression significantly affected apoptosis and activation of caspase and the addition of cytochrome c to cell-free extracts results in caspase activation, suggesting the activation of caspase is dependent on cytochrome c. Although Apaf-1 has not been identified in Lepidoptera, the inhibitor of apoptosome formation can inhibit apoptosis and caspase activation. Cytochrome c may be exclusively required for Lepidoptera apoptosis.

关键词： apoptosis cytochrome e Drosophila insect Lepidoptera

(Quasi-)Poisson Enveloping Algebras

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Acta Mathematica Sinica,English Series 2013年第1期29卷 105-118页

作者： Yan hong yang Yuan YAO Yu YE Department of Mathematics Columbia University Department of Mathematics The University of Texas1 University Station C1200Austin TX 78712 U.S.A. Department of Mathematics University of Science and Technology of China

We introduce the quasi-Poisson enveloping algebra and Poisson enveloping algebra for a non-commutative Poisson algebra. We prove that for a non-commutative Poisson algebra, the category of quasi-Poisson modules is equivalent to the category of left modules over its quasi-Poisson enveloping algebra, and the category of Poisson modules is equivalent to the category of left modules over its Poisson enveloping algebra.

关键词： Non-commutative Poisson algebra Poisson module Poisson enveloping algebra

Variations of bacterial and fungal communities along a primary successional chronosequence in the Hailuogou glacier retreat area(Gongga Mountain, SW China)

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Journal of Mountain Science 2016年第9期13卷 1621-1631页

作者： SUN hong-yang WU Yan-hong ZHOU Jun BING Hai-jian Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences

New terrestrial habitats have emerged and a primary succession has developed in the retreat area （29°34＇N, 102°oo＇E, 2951-2886 m） after the retreat of the Hailuogou glacier. To investigate soil microbial changes along the primary successional chronosequence, mixed soil samples were collected at six sites at different ages （2 young sites, 2 mid-aged sites, and 2 old sites）. The RNA was extracted and amplified. Bacterial 16S rRNA and fungal 18S rRNA were analyzed using high-throughput 454 pyrosequencing analysis. Overall, pyrosequeneing showed that Proteobacteria, Acidobacteria, Baeteroidetes and Actinobacteria were the main bacterial phyla, and the fungal communities were strongly dominated by the phyla Ascomyeota and Basidiomyeota in the retreat area. The Shannon diversity index （Hshannon） of bacteria was 6.5 - 7.9, and that of fungi was 2.2 - 4.1 in these sites. For the bacterial communities, diversity and evenness values were highest on the mid-age sites and were relatively low on the young trend was observed for the and old sites. A similar fungal communities. In contrast, soil properties showed significant linear distributional trends （increase or decrease） with the age of the site. Combining the linear change patterns of soil properties, the highest values of bacterial and fungal evenness and diversity in the mid-aged sites indicated that there was less environmental stress and more niches for microbial communities in the middle successional stage compare with other stages. In addition, our analysis showed that microbial communities were the main drivers that build a soil organic matter pool to expedite pedogenesis for ecosystem succession. This primary succession in the Hailuogou glacier retreat area is developing rapidly compared with that in other glacier retreats.

关键词： Primary successional chronosequence Microbial community Soil properties 454sequencing Rapid succession