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HyBar:high efficient barrier synchronization based on a hybrid packet-circuit switching Network-on-Chip

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Science China(Information Sciences) 2017年第6期60卷 237-248页

作者： zhenqi WEI Peilin LIU Rongdi sun School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

Realizing barrier synchronization in multi-/many-core processors with high efficiency becomes more and more challenging as the number of cores integrated in a single chip keeps growing. Quite a few barrier solutions have been proposed, while they provide limited improvements for synchronizing large amounts of cores or incur unfavorable restrictions on performing concurrent barriers. This paper presents Hy Bar, a hardware barrier based on a hybrid switching No C which adopts packet switching and circuit switching methods in two sub-networks respectively. Dedicated channels in the circuit-switching sub-network are dynamically built and removed when barrier requests traverse the packet-switching sub-network according to a modified dimensionorder routing algorithm. The efficiency of inter-core communication for concurrent barriers is improved by merging barrier arrival requests and broadcasting release requests along the circuit channels. The execution time of synthetic cases, benchmark kernels and parallel applications using various barrier solutions are evaluated in an RTL-based simulation platform. Experimental results show that our proposal provides about 15%–50%performance improvement compared to previous solutions, while the hardware overhead is marginal under SMIC40 nm technology. Moreover, Hy Bar introduces a minor efficiency loss for concurrent barriers with no limitation on their layouts of participating cores in the on-chip network.

关键词： NoC barrier synchronization packet-circuit switching concurrent barriers routing algorithm

生长分化因子- 15和血管外肺水指数在ARDS患者严重程度分级及预后预测中的价值

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中华危重病急救医学 2020年第10期32卷 1226-1230页

作者：尚明升高延秋贾宝辉王宝玉李珊李陶幸子董睿孙振淇吕远郑州大学附属郑州中心医院RICU 郑州450007 郑州大学附属郑州中心医院ICU 郑州450007 郑州大学附属郑州中心医院EICU 郑州450007

目的探讨生长分化因子-15(GDF-15)和血管外肺水指数(EVLWI)在急性呼吸窘迫综合征(ARDS)患者严重程度分级及预后预测中的应用价值。方法选择2019年1月至2020年2月郑州大学附属郑州中心医院呼吸重症监护病房(RICU)收治的18~75岁ARDS患者... 详细信息

目的探讨生长分化因子-15(GDF-15)和血管外肺水指数(EVLWI)在急性呼吸窘迫综合征(ARDS)患者严重程度分级及预后预测中的应用价值。方法选择2019年1月至2020年2月郑州大学附属郑州中心医院呼吸重症监护病房(RICU)收治的18~75岁ARDS患者为研究对象。所有患者均根据病情进行机械通气、抗感染、维持水和电解质及酸碱内环境稳定、血液净化及营养支持等常规治疗,并于入科后行脉搏指示连续心排血量监测(PiCCO),记录治疗前及治疗24、48、72 h的EVLWI;同期采用酶联免疫吸附试验(ELISA)检测血清GDF-15水平。根据ARDS 2012柏林标准将患者分为轻、中、重度,比较不同病情程度患者治疗前后EVLWI、GDF-15水平。此外,GDF-15以3458 ng/L、EVLWI以15 mL/kg为界限,比较分析不同GDF-15或EVLWI水平患者重症监护病房(ICU)住院时间、ICU病死率和28 d病死率。结果共入选82例ARDS患者,轻度22例,中度28例,重度32例。中、重度组ARDS患者治疗前后各时间点GDF-15、EVLWI水平均高于轻度ARDS者。重度ARDS患者GDF-15和EVLWI水平均高于中度组,除治疗24 h GDF-15水平差异无统计学意义外(ng/L:3900.41±546.43比3695.66±604.73,P>0.05),其他各时间点差异均有统计学意义〔GDF-15(ng/L):治疗前为3786.11±441.45比3106.83±605.09,48 h为3895.48±558.96比3333.29±559.66,72 h为3397.33±539.56比3047.53±499.57;EVLWI(mL/kg):治疗前为19.06±1.91比14.31±1.50,24 h为18.56±2.23比13.26±1.69,48 h为17.23±1.76比12.45±1.36,72 h为15.47±1.81比11.13±2.19,均P<0.05〕。根据截断值处理,GDF-15≥3458 ng/L和GDF-15<3458 ng/L者各23例,EVLWI≥15 mL/kg、EVLWI<15 mL/kg者各23例;高GDF-15者ICU住院时间和28 d病死率显著高于低GDF-15者〔ICU住院时间(d):21.22±2.69比15.37±3.14,28 d病死率:56.5%比21.7%,均P<0.05〕;高EVLWI患者ICU住院时间和28 d病死率也显著高于低EVLWI患者〔ICU住院时间(d):18.45±2.61比14.98±2.75,28 d病死率:47.8%比17.4%,均P<0.05〕。结论GDF-15和EVLWI水平一定程度上能够反映ARDS患者病情严重程度,且高GDF-15和EVLWI水平与ARDS患者不良预后显著相关。

关键词：生长分化因子-15 血管外肺水指数急性呼吸窘迫综合征严重程度评估

关于非线性时变差分方程的运动稳定性(英文)

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哈尔滨工业大学学报 1988年第3期 105-106页

作者：孙振绮王家兴王文志哈尔滨工业大学数学系

This paper presents some criteria of asymptotic stability and non-stability for judging the equilibrium point of time-varying nonlinear difference equations. Consider the time-varying discrete system described by time... 详细信息

关键词： Stability difference equation.

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稀土铝连铸连轧杆的工艺研究

轻金属 2000年第1期 57-57页

作者：仲崇彩孙振启吕延军平阴铝厂山东平阴250403

采用连铸连轧工艺，在电解铝水中加入微量稀土元素，可起到除杂变质，细化组织，提高产品的抗拉强度和导电性能，改善加工性能的作用。

关键词：晶粒细化加工性能铝杆连铸连轧稀土

Experimental and theoretical investigation on degradation of dimethyl trisulfide by ultraviolet/peroxymonosulfate: Reaction mechanism and influencing factors

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Journal of Environmental Sciences 2023年第5期127卷 824-832页

作者： Jianing sun Xiaodong Xin Shaohua sun zhenqi Du Zhenxing Yao Mingquan Wang Ruibao Jia Shandong Province Water Supply and Drainage Monitoring Center Jinan 250101China School of Water Conservancy and Environment University of JinanJinan 250022China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

With a large amount of domestic sewage and industrial wastewater discharged into the water bodies,sulfur-containing organicmatter inwastewater produced volatile organic sulfide,such as dimethyl trisulfide(DMTS)throughmicroorganisms,caused the potential danger of drinking water safety and human *** present,there is still a lack of technology on the removal of *** this study,the ultraviolet/peroxymonosulfate(UV/PMS)advanced oxidation processes was used to explore the degradation of *** than 90%of DMTS(30μg/L)was removed under the conditions of the concentration ratio of DMTS to PMS was 3:40,the temperature(T)was 25±2℃,and 10 min of irradiation by a 200 W mercury lamp(365 nm).The kinetics rate constant k of DMTS reacting with hydroxyl radical(HO·)was determined to be 0.2477 min^(−1).Mn^(2+),Cu^(2+)and NO_(3)^(-)promoted the degradation of DMTS,whereas humic acid and Cl-in high concentrations inhibited the degradation *** chromatography-mass spectrometry was used to analyze the degradation products and the degradation intermediates were dimethyl disulfide and *** functional theory was used to predict the possible degradation mechanism according to the frontier orbital theory and the bond breaking mechanism of organic *** results showed that the S–S,C–S and C–H bonds in DMTS molecular structure were prone to fracture in the presence of free radicals,resulting in the formation of alkyl radicals and sulfur-containing radicals,which randomly combined to generate a variety of degradation products.

关键词： Ultraviolet/peroxymonosulfate Dimethyl trisulfide Products Density functional theory Degradation mechanism

Evaluation of nonwoven geotextile drainage performance and experimental simulation of key processes in Yellow River sediment-backfilled reclaimed coal-mined subsided lands

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International Journal of Agricultural and Biological Engineering 2024年第6期17卷 193-201页

作者： Huang sun zhenqi Hu Deyun Song Shuai Wang Yi Yu Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology-BeijingBeijing 100083China School of Environment and Spatial Informatics China University of Mining and TechnologyXuzhou 221116JiangsuChina

The innovative utilization of Yellow River sediment to reclaim coal-mined subsided lands addresses dual environmental challenges by offering a sustainable remediation ***,efficient water drainage constitutes a significant hurdle in this *** strategic placement of nonwoven geotextile at the tail end of the fill sections has ameliorated fine sediment loss and drainage efficacy *** study assesses various nonwoven geotextile grades for their effectiveness in moisture expulsion,integrating comprehensive evaluations and simulation tests of pivotal *** findings reveal that selected nonwoven geotextiles(N1,N2,T1,T2,T3,T4)demonstrate appropriate apparent opening size(AOS)and permeability,coupled with clogging resistance,aligning with theoretical criteria for soil conservation,water permeation,and blockage *** to the nonwoven geotextile’s clogging are factors such as apparent opening size(AOS),thickness,permeability,load capacity,gradient ratio(GR),and sediment retention-all requiring meticulous selection for real-world *** choice of nonwoven geotextile in the drainage of Yellow River sediment reclaimed lands must hinge on a holistic assessment framework,encompassing retention,permeability,anti-clogging attributes,and additional performance metrics,to ensure that the materials fulfill the specific technical standards while remaining *** study provides valuable insights into the selection and application of geotextiles in Yellow River sediment-backfilled reclamation drainage projects,contributing to the advancement of mine ecological restoration practices,particularly in the context of Yellow River sediment-backfilled reclamation projects.

关键词： nonwoven geotextile drainage performance Yellow River sediment coal-mined subsided land filling reclamation engineering construction

Facile synthesis based on novel carbon-supported cyanogel of structurally ordered Pd3Fe/C as electrocatalyst for formic acid oxidation

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Nano Research 2018年第9期11卷 4686-4696页

作者： Zhenyuan Liu Gengtao Fu Jiahui Li zhenqi Liu Lin Xu Dongmei sun Yawen Tang Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials School of Chemistry and Materials Science Nanjing Normal University Nanjing 210023 China School of Chemical and BiomedicalEngineering Nanyang Technological University Singapore 637459 Singapore

A novel carbon-supported cyanogel （C@cyanogel）-derived strategy is used to synthesize an intermetallic Pd3Fe/C compound of the desired ordered Pd3Fe phase with a small particle size. The novelty of this work lies in using carbon- supported K2PdHCl4/K4Fe^Ⅱ（CN）6 cyanogel as a reaction precursor, generated through the substitution of two chloride ligands by the nitrogen ends of the cyanide ligands on the metal center. The inherent nature of cyanogels can effectively suppress the movement of Pd^0 and Fe^0 nuclei in the crystal, benefiting the formation of the intermetallic, which is otherwise challenging via traditional synthesis techniques. The ordered Pd3Fe/C catalyst exhibits excellent catalytic activity and good cycle stability for the formic acid oxidation （FAO） reaction relative to the properties of disordered Pd3Fe/C and commercial Pd/C catalysts, dernonstrating that the ordered Pd3Fe/C is a promising replacement for commercial Pd-based catalysts. The outstanding performance can be ascribed to the full isolation of active sites in the ordered Pd3Fe structure and the modified electronic structure of the active components. This work provides an effective and novel route to obtain Pd-based intermetallic compounds with potential applications in a wide range of electrocatalysis.

关键词： carbon@cyanogel Pd3Fe/C ordered intermetallic electrocatalyst formic acid oxidation

某小型航空发动机活塞烧顶失效分析及其解决方案

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湖南工业职业技术学院学报 2019年第1期19卷 1-3页

作者：孙振起伍泽全吴安如陈蓉董丽君湖南工程学院机械学院湖南湘潭411101 长沙云智航科技有限公司湖南长沙410000

对某小型航空发动机进行技术改造后,试车几分钟就出现故障停机,拆解后发现活塞烧顶,并且活塞裙带处有磨损,借助电镜等技术手段对失效件进行技术分析,最终找出失效产生原因并经过技术改进,解决了活塞烧顶故障,发动机运行正常。

关键词：发动机故障活塞烧顶烧蚀技术改造

兰州市地铁建设对城市环境的影响--基于兰州市居民感知数据的分析

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环境影响评价 2018年第1期40卷 53-57页

作者：孙振亓線海彦罗君米旦旦年丽丽蒋生豪甘肃农业大学资源与环境学院甘肃兰州730070

地铁建设会对城市环境造成一系列影响,公众对环境影响的感知不可忽视。以兰州市地铁一号线为对象,通过问卷调查方式获取地铁建设过程的居民环境感知数据,运用因子分析法研究居民感知空间分异特点,聚类分析法研究不同区域居民感知情况的... 详细信息

地铁建设会对城市环境造成一系列影响,公众对环境影响的感知不可忽视。以兰州市地铁一号线为对象,通过问卷调查方式获取地铁建设过程的居民环境感知数据,运用因子分析法研究居民感知空间分异特点,聚类分析法研究不同区域居民感知情况的异同,层次分析法探讨居民对各环境影响因素的感知程度,综合判断地铁建设对城市环境的影响。研究结果表明:居民环境感知存在明显的空间差异,总体呈现东高西低的趋势;不同区域居民的感知存在异同点,这些异同点与对应区域的自身特点相关;居民对地铁建设影响行居环境的感知最强,生态环境次之。结合感知调查提出合理的措施建议,可为减弱地铁建设对城市环境的影响提供参考。

关键词：地铁建设环境影响居民感知空间差异兰州