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TreeSensing: Linearly Compressing Sketches with Flexibility

Proceedings of the ACM on Management of Data 2023年第1期1卷 1-28页

作者： Zirui Liu Yixin zhang Yifan Zhu ruwen zhang Tong Yang Kun Xie Sha Wang Tao Li Bin Cui Peking University & Peng Cheng Laboratory Beijing China Hunan University Changsha China Peking University Changsha China Peking University Beijing China

A Sketch is an excellent probabilistic data structure, which records the approximate statistics of data streams. Linear additivity is an important property of sketches. This paper studies how to keep the linear property after sketch compression. Most existing compression methods do not keep the linear property. We propose TreeSensing, an accurate, efficient, and flexible framework to linearly compress sketches. In TreeSensing, we first separate a sketch into two parts according to counter values. For the sketch with small counters, we propose a technique called TreeEncoding to compress it into a hierarchical structure. For the sketch with large counters, we propose a technique called SketchSensing to compress it using compressive sensing. We theoretically analyze the accuracy of TreeSensing. We use TreeSensing to compress 7 sketches and conduct two end-to-end experiments: distributed measurement and distributed machine learning. Experimental results show that TreeSensing outperforms prior art on both accuracy and efficiency, which achieves up to 100× smaller error and 5.1× higher speed than state-of-the-art Cluster-Reduce. All related codes are open-sourced.

关键词： compression data streams distributed measurement sketches

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Hypertriglyceridaemia-associated acute pancreatitis: diagnosis and impact on severity

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HPB 2019年第9期21卷 1240-1249页

作者： zhang, ruwen Deng, Lihui Jin, Tao Zhu, Ping Shi, Na Jiang, Kun Li, Lan Yang, Xinmin Guo, Jia Yang, Xiaonan Liu, Tingting Mukherjee, Rajarshi Singh, Vikesh K. Windsor, John A. Sutton, Robert Huang, Wei Xia, Qing Sichuan Univ West China Hosp Sichuan Prov Pancreatitis Ctr Dept Integrated Tradit Chinese & Western Med 37 Wannan Guoxue Alley Chengdu 610041 Sichuan Peoples R China Sichuan Univ West China Hosp West China Liverpool Biomed Res Ctr Chengdu Sichuan Peoples R China Univ Liverpool Royal Liverpool Univ Hosp Inst Translat Med Liverpool Pancreatitis Res Grp Liverpool Merseyside England Johns Hopkins Med Inst Div Gastroenterol Pancreatitis Ctr Baltimore MD 21205 USA Univ Auckland Dept Surg Auckland New Zealand

Background: The level of hypertriglyceridaemia (HTG) at which the risk of acute pancreatitis (AP) increases and the impact of HTG on AP attributable to other aetiologies remains unclear. Methods: We compared clinical outcomes of patients admitted within 48 h of the onset of abdominal pain from a first episode of AP and admission serum triglyceride levels of either < 5.65 mmol/l (< 500 mg/dl) or >= 5.65 to <11.3 mmol/l (moderate HTG) or >= 11.3 mmol/l (>= 1000 mg/dl, severe HTG). Results: Among a cohort of 1,233 patients with AP there were significant progressive increases in all major deleterious clinical outcomes including mortality (all P-trend < 0.05) that were directly dependent on admission triglyceride levels. Outcomes were improved by earlier presentation (< 24 h compared to 24-48 h from abdominal pain onset). Patients with severe HTG and a concomitant aetiology (n = 68) had significantly more persistent organ failure, pancreatic necrosis and longer hospital stays (P < 0.05) than those with severe HTG alone (n = 206). Conclusions: There appears to be an association between HTG grade and the severity of AP. Severe HTG significantly increased the severity of AP, over AP attributable to other aetiologies. Moderate as well as severe HTG can be used as a criterion for the diagnosis of HTG-associated AP.

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SSA: Microsecond-Level Clock Synchronization Based on Machine Learning for IoT Devices

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2023年 72卷 1页

作者： Fan, Zhuochen Xu, Yanwei Liu, Peng Li, Xiaodong zhang, ruwen Yang, Tong Wu, Wenfei Li, Yuqing Chen, Li zhang, Gong Peking Univ Sch Comp Sci Beijing 100871 Peoples R China Peking Univ Natl Engn Lab Big Data Anal Technol & Applicat Beijing 100871 Peoples R China Huawei Technol Co Ltd Cent Res Inst Theory Lab Labs 2012 Hong Kong Peoples R China Peng Cheng Lab Shenzhen 518066 Peoples R China Wuhan Univ Sch Cyber Sci & Engn Wuhan 430072 Peoples R China Zhongguancun Lab Beijing 100190 Peoples R China

Clock synchronization is an essential but challenging task for internet of things (IoT) devices. The state-of-the-art data-driven Huygens solution cannot achieve accuracy for IoT networks, because the devices are usually weak in power to make massive timestamp probing for data-driven solutions. We propose the SSA clock synchronization scheme to improve the Huygens algorithm. First, SSA has a sliding window mechanism to accumulate data points for the data-driven support vector machine (SVM) algorithm in Huygens, which complements the issue of insufficient data points. Second, SSA applies a smoothing method to the periodical estimated clock offset and drift, which eliminates the noise introduced by the larger sliding window. Third, SSA makes an adaptive clock correction instead of the periodical correction in Huygens so as to avoid correcting the clock before the algorithm could stably estimate and smooth the clock offset and drift. We conduct extensive experiments on a real device (Huawei Sound X), and the results shows that our SSA can achieve synchronization accuracy of around 20 mu s in the actual working environment.

关键词： Synchronization Clocks Internet of Things Hardware Support vector machines Protocols Wireless LAN Adaptive correction clock synchronization drift machine learning offset sliding window smoothing

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Enhanced High-Temperature Performance of NH3-SCR Catalysts for Lean-Burn Engines

Enhanced High-Temperature Performance of NH3-SCR Catalysts f...

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2024 Vehicle Powertrain Diversification Technology Forum, VPD 2024

作者： Pan, Shiyi Wang, ruwen zhang, Nan Xu, Zhiqin Hu, Jiangtao Liao, Xiuke Duan, Pingping Chen, Ruilian BYD Auto Industry Company Limited China

NOx after-treatment has greatly limited the development of lean-burn technology for gasoline engines. NH3-Selective Catalytic Reduction (SCR) technology has been successfully applied to NOx conversion in diesel engines. For gasoline engines, SCR catalyst is required to maintain high activity over a higher temperature window. In this study, we utilized a turbocharged and intercooled 2.0 L petrol engine to investigate the NOx conversion of two zeolite-based SCR catalysts, Cu-SSZ-13 and Fe/Cu-SSZ-13, at exhaust flows ranging from 80 to 300 kg/h and exhaust temperatures between 550 to 600°C. The catalysts were characterized using SEM, ICP, XRD, H2-TPR, NH3-TPD, and other methods. The selected Fe/Cu-SSZ-13 catalyst showed higher NOx conversion (>80%) in the temperature range of 550~600oC and 80~300 kg/h exhaust gas flow. NOx output could be controlled below 10ppm. The characterization results showed that although the specific surface area and acidic sites decreased after the aging treatment for Fe/Cu-SSZ-13, they still retained active sites, showing higher activity and stability. © 2025 SAE International.

关键词： Selective catalytic reduction

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教你认清印刷ERP及如何选型

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印刷杂志 2010年第5期 41-43页

作者：张汝文深圳科网联计算机技术有限公司

在激烈的市场竞争和内外环境的压力下，印刷企业都面临着各种问题，如资金短缺、原材料涨价、不能保证按期交货、用户服务水平差、应变能力差、市场竞争力差、库存资金占用多、设备利用率低、生产周期长、物料短缺、成本高、计划不合理... 详细信息

在激烈的市场竞争和内外环境的压力下，印刷企业都面临着各种问题，如资金短缺、原材料涨价、不能保证按期交货、用户服务水平差、应变能力差、市场竞争力差、库存资金占用多、设备利用率低、生产周期长、物料短缺、成本高、计划不合理、进度反馈不及时、于币测能力差、生产管理水平低，等等。

关键词： ERP 选型印刷企业

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Early Rapid Fluid Therapy Is Associated with Increased Rate of Noninvasive Positive-Pressure Ventilation in Hemoconcentrated Patients with Severe Acute Pancreatitis

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DIGESTIVE DISEASES AND SCIENCES 2020年第9期65卷 2700-2711页

作者： Li, Lan Jin, Tao Wen, Si Shi, Na zhang, ruwen Zhu, Ping Lin, Ziqi Jiang, Kun Guo, Jia Liu, Tingting Philips, Anthony Deng, Lihui Yang, Xiaonan Singh, Vikesh K. Sutton, Robert Windsor, John A. Huang, Wei Xia, Qing Sichuan Univ West China Hosp Sichuan Prov Pancreatitis Ctr Dept & Lab Integrated Tradit Chinese & Western Me 37 Wannan Guoxue Alley Chengdu 610041 Sichuan Peoples R China Sichuan Univ West China Hosp West China Liverpool Biomed Res Ctr 37 Wannan Guoxue Alley Chengdu 610041 Sichuan Peoples R China Yichang Hosp Tradit Chinese Med Dept Endocrinol & Metab Yichang Peoples R China Univ Auckland Sch Biol Sci Appl Surg & Metab Lab Auckland New Zealand Johns Hopkins Med Inst Pancreatitis Ctr Div Gastroenterol Baltimore MD 21205 USA Univ Liverpool Royal Liverpool Univ Hosp Liverpool Pancreatitis Res Grp Liverpool Merseyside England Univ Liverpool Inst Translat Med Liverpool Merseyside England Univ Auckland Fac Med & Hlth Sci Surg & Translat Res Ctr Auckland New Zealand

Background/Aims Hematocrit is a widely used biomarker to guide early fluid therapy for patients with acute pancreatitis (AP), but there is controversy over whether early rapid fluid therapy (ERFT) should be used in hemoconcentrated patients. This study investigated the association of hematocrit and ERFT with clinical outcomes of patients with AP. Methods Data from prospectively maintained AP database and retrospectively collected fluid management details were stratified according to actual severity defined by revised Atlanta classification. Hemoconcentration and "early" were defined as hematocrit > 44% and the first 6 h of general ward admission, respectively, and "rapid" fluid rate was defined as >= 3 ml/kg/h. Patients were allocated into 4 groups for comparisons: group A, hematocrit <= 44% and fluid rate < 3 ml/kg/h;group B, hematocrit <= 44% and fluid rate >= 3 ml/kg/h;group C, hematocrit > 44% and fluid rate < 3 ml/kg/h;and group D, hematocrit > 44% and fluid rate >= 3 ml/kg/h. Primary outcome was rate of noninvasive positive-pressure ventilation (NPPV). Results A total of 912 consecutive AP patients were analyzed. ERFT has no impact on clinical outcomes of hemoconcentrated, non-severe or all non-hemoconcentrated AP patients. In hemoconcentrated patients with severe AP (SAP), ERFT was accompanied with increased risk of NPPV (odds ratio 5.96, 95% CI 1.57-22.6). Multivariate regression analyses confirmed ERFT and hemoconcentration were significantly and independently associated with persistent organ failure and mortality in patients with SAP. Conclusions ERFT is associated with increased rate of NPPV in hemoconcentrated patients with SAP.

关键词： Acute pancreatitis Fluid therapy Hemoconcentration Noninvasive positive-pressure ventilation Persistent organ failure

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Targeted Metabolomic Evaluation of Acupuncture for Chronic Stable Angina Pectoris

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JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY 2014年第16期64卷 C209-C209页

作者： Chen Liang Wu Qiaofeng Tang Lewei Tang Dan zhang ruwen Liang Fanrong Chengdu Univ Tradit Chinese Med Sch Acupuncture & Moxibust Chengdu Peoples R China Chengdu Univ Informat Technol Software Engn Coll Chengdu Peoples R China

GW25-e0755

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印刷ERP的选型

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印刷杂志 2009年第4期 24-25页

作者：张汝文深圳市科网联计算机技术有限公司

ERP即企业资源规划管理系统，是集物质资源、资金资源、时间资源和信息资源等企业各方面资源于一体的管理软件系统，是一种管理平台的革命。通过应用该系统，可以使企业实现规范化、标准化管理，达到降低库存、降低成本、及时交货、提... 详细信息

ERP即企业资源规划管理系统，是集物质资源、资金资源、时间资源和信息资源等企业各方面资源于一体的管理软件系统，是一种管理平台的革命。通过应用该系统，可以使企业实现规范化、标准化管理，达到降低库存、降低成本、及时交货、提高服务水平、提高企业应变能力的目的。几十年来，国际上无数企业的成功应用证明，企业实施ERP管理系统就是解决以上这些问题的有效办法。

关键词： ERP 选型印刷

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“枫桥经验”在医疗纠纷调解领域的实践与发展——基于甘肃第三方医疗纠纷人民调解委员会的调研

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社会治理 2019年第5期 86-94页

作者：张入文解放甘肃第三方医疗纠纷人民调解委员会甘肃省患者维权协会甘肃省保险行业协会保险专业中介工作委员会中国卫生法学会中华全国人民调解员协会医疗纠纷专业委员会兰州大学教学研究基地甘肃省卫健委医院

“依靠群众就地化解矛盾”是“概桥经验”的人民调解的精髓,研究、实践如何把人民调解精髓引入医疗纠纷调解领域,不仅对抓好医疗纠纷风险防范和医疗纠纷人民调解、服务保障和改善民生有着重大意义,也对推动人民调解工作、实现基层预防... 详细信息

“依靠群众就地化解矛盾”是“概桥经验”的人民调解的精髓,研究、实践如何把人民调解精髓引入医疗纠纷调解领域,不仅对抓好医疗纠纷风险防范和医疗纠纷人民调解、服务保障和改善民生有着重大意义,也对推动人民调解工作、实现基层预防化解矛盾与基层社会治理联动,提高国家治理体系与治理能力现代化具有极为重要的现实意义。本文基于甘肃第三方医疗纠纷人民调解委员会的实践调硏,详细分析了医疗纠纷产生的原因,对第三方人民调解的内涵、范围、特点和执行要点进行了深入阐释,证明在医疗纠纷调解领域坚持发展“枫桥经验”具备理论、实践双重价值。

关键词：枫桥经验第三方人民调解公正性专业性规范性

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后殖民视角下身份焦虑探微——以《龙翼》为例

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宿州学院学报 2020年第1期35卷 45-49页

作者：周慧章汝雯浙江财经大学外国语学院浙江杭州310018

为了深度挖掘小说《龙翼》中人物身份焦虑的根源及身份归属问题,依托后殖民理论为框架,分析《龙翼》中华裔移民文化身份焦虑成因脉络及其身份归属导向,重点探究叶祥添如何联系其身份背景、地域空间、文化冲突展现华裔移民的身份迷失及... 详细信息

为了深度挖掘小说《龙翼》中人物身份焦虑的根源及身份归属问题,依托后殖民理论为框架,分析《龙翼》中华裔移民文化身份焦虑成因脉络及其身份归属导向,重点探究叶祥添如何联系其身份背景、地域空间、文化冲突展现华裔移民的身份迷失及背后隐匿的权力与话语关系,旨在启发全球化语境下具有文化身份困惑的群体,并为其寻回身份自信、走出困惑提供基础.

关键词：《龙翼》身份焦虑后殖民理论

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