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基于距离和DF-RLS的时间序列异常检测

计算机工程 2012年第12期38卷 32-35页

作者：陈乾胡谷雨路威解放军理工大学通信工程学院南京210007 解放军理工大学指挥自动化学院南京210007

为能同时检测时间序列中的附加异常和革新异常,改进自回归模型,提出距离因子递推最小二乘(DF-RLS)线性预测算法。在此基础上,给出一种基于距离和DF-RLS的联合异常检测方法——DDR-OD。实验结果表明,与当前其他时间序列异常检测方法相比,... 详细信息

为能同时检测时间序列中的附加异常和革新异常,改进自回归模型,提出距离因子递推最小二乘(DF-RLS)线性预测算法。在此基础上,给出一种基于距离和DF-RLS的联合异常检测方法——DDR-OD。实验结果表明,与当前其他时间序列异常检测方法相比,DDR-OD的检测效果较优。

关键词：时间序列异常检测递推最小二乘距离因子附加异常革新异常

低蛋白配伍α-酮酸饮食对慢性肾衰竭大鼠体内氧化应激水平的影响

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上海交通大学学报（医学版） 2012年第8期32卷 1050-1055页

作者：龙泉朱淳单剑萍陆玮蒋更如上海交通大学医学院附属新华医院肾脏内科上海200092

目的研究低蛋白配伍α-酮酸饮食对慢性肾衰竭大鼠体内氧化应激水平的影响。方法 40只雄性SD大鼠随机分为对照组(行剥离肾包膜假手术,n=10)和模型组(行两步法肾大部切除术,n=30)。模型组1周后根据不同喂养方式分为以下亚组:正常蛋白组(NP... 详细信息

目的研究低蛋白配伍α-酮酸饮食对慢性肾衰竭大鼠体内氧化应激水平的影响。方法 40只雄性SD大鼠随机分为对照组(行剥离肾包膜假手术,n=10)和模型组(行两步法肾大部切除术,n=30)。模型组1周后根据不同喂养方式分为以下亚组:正常蛋白组(NPD组,n=10,以含18%酪蛋白的饲料喂养)、低蛋白组(LPD组,n=10,以含6%酪蛋白的饲料喂养)、低蛋白+α-酮酸组(LK组,n=10,以含5%酪蛋白+1%α-酮酸的饲料喂养)。对照组以含18%酪蛋白的饲料喂养。观察各组大鼠体质量及血、尿生化指标的改变,生化指标包括血肌酐(Scr)、尿素氮(BUN)、白蛋白(Alb)、总蛋白(TP)和24 h尿蛋白排泄量。分光光度法测定血清和肾皮质匀浆中丙二醛(MDA)、超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)水平。放射免疫法测定肾皮质匀浆中肾素和血管紧张素Ⅱ(AngⅡ)活性;ELISA法测定血浆中AngⅡ的活性。结果饲养12周后,各模型组大鼠的体质量、Alb和TP水平与对照组比较,差异均无统计学意义(均P>0.05)。饲养4、8、12周时,各模型组大鼠的24 h尿蛋白排泄量均显著高于对照组(均P<0.05);其中LPD组和LK组均显著低于NPD组(均P<0.05),LK组较LPD组进一步降低(P<0.05)。LK组大鼠肾皮质匀浆中肾素活性和AngⅡ活性均较NPD组显著降低(均P<0.05)。与对照组比较,各模型组大鼠血清和肾皮质匀浆中MDA水平均显著升高(均P<0.05),SOD和GSH-Px水平均显著降低(均P<0.05);其中LPD组和LK组MDA水平较NPD组显著降低(均P<0.05),SOD和GSH-Px水平显著升高(均P<0.05)。相关性分析结果显示:肾皮质匀浆中MDA水平与AngⅡ的活性呈正相关(r=0.892,P<0.001),而SOD和GSH-Px水平均与AngⅡ的活性呈负相关(r值分别为-0.978和-0.965,均P<0.001)。结论低蛋白配伍α-酮酸饮食在维持营养状态稳定的前提下具有肾脏保护作用,可改善慢性肾衰竭大鼠体内增强的氧化应激及减少蛋白尿排泄;该作用可能与营养治疗本身有关,也可能与抑制肾脏局部肾素—血管紧张素系统的活性有关。

关键词：低蛋白饮食 α-酮酸慢性肾衰竭氧化应激肾素-血管紧张素系统

Non-intrusive Load Monitoring Based on Graph Total Variation for Residential Appliances

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 947-957页

作者： Xiaoyang Ma Diwen Zheng Xiaoyong Deng Ying Wang Dawei Deng wei Li the College of Electrical Engineering Sichuan UniversityChengdu 610065China State Grid Chongqing Electric Power Company Chongqing 400014China State Grid Sichuan Electric Power Company Chengdu 610095China State Grid Hubei Electric Power Company Limited Research Institute Wuhan 430077China

Non-intrusive load monitoring is a technique for monitoring the operating conditions of electrical appliances by collecting the aggregated electrical information at the household power *** several studies on the mining of unique load characteristics,few studies have extensively considered the high computational burden and sample *** on lowfrequency sampling data,a non-intrusive load monitoring algorithm utilizing the graph total variation(GTV)is proposed in this *** algorithm can effectively depict the load state without the need for prior ***,the combined Kmeans clustering algorithm and graph signals are used to build concise and accurate graph structures as load *** GTV representing the internal structure of the graph signal is introduced as the optimization model and solved using the augmented Lagrangian iterative *** introduction of the difference operator reduces the computing cost and addresses the inaccurate reconstruction of the graph *** low-frequency sampling data,the algorithm only requires a little prior data and no training,thereby reducing the computing *** conducted using the reference energy disaggregation dataset and almanac of minutely power dataset demonstrated the stable superiority of the algorithm and its low computational burden.

关键词： Non-intrusive load monitoring graph total variation augmented Lagrangian function smart grid

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废水中有机卤的来源及分析方法研究综述

工业水处理 2023年第8期43卷 1-11页

作者：罗旺卢伟何欢陈白杨哈尔滨工业大学(深圳) 广东深圳518055 中国市政工程西南设计研究总院有限公司四川成都610213

有机卤是一类典型的有机污染物,能够给生态环境和人类健康造成危害,因此受到越来越多的学者和工程人员的关注。有机卤广泛存在于各种废水当中,具有种类繁多且难以降解的特点。现有的废水中有机卤分析方法因成本高、难以实现自动化等问... 详细信息

有机卤是一类典型的有机污染物,能够给生态环境和人类健康造成危害,因此受到越来越多的学者和工程人员的关注。有机卤广泛存在于各种废水当中,具有种类繁多且难以降解的特点。现有的废水中有机卤分析方法因成本高、难以实现自动化等问题未能得到广泛应用。为促进对废水中总有机卤(TOX)分析方法的了解,综述了废水中TOX的来源及其污染程度,总结且比较了国内外主要的TOX标准分析方法,并对现有标准分析方法的不足给出了改进建议。此外,总结了TOX分析中分离、转化与检测步骤的研究现状及其影响因素,其中介绍了诸如电驱动膜分离法和真空紫外光解法等有利于实现自动化的新方法。最后对TOX分析方法的应用和研究方向进行了展望,以期对实现废水中TOX的高效监测提供参考。

关键词：废水处理总有机卤电驱动膜分离法真空紫外光解法

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A strategy to synthesize phosphorus-containing nickel phyllosilicate whiskers to enhance the flame retardancy of epoxy composites with excellent mechanical and dry-friction properties

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 39-50页

作者： Shibin Nie Zongquan Zhao Yuxuan Xu wei He Wenli Zhai Jinian Yang School of Public Security and Emergency Management Anhui University of Science and TechnologyHefei231131China School of Safety Science and Engineering Anhui University of Science and TechnologyHuainan232001China School of Materials Science and Engineering Anhui University of Science and TechnologyHuainan232001China Institute of Energy Hefei Comprehensive National Science CenterHefei230000China

To enhance the fire safety and wear resistance of epoxy,phosphorus-containing nickel phyllosilicate whiskers(FP-NiPS)were synthesized using a facile hydrothermal technology,with 9,10-dihydro-9-oxa-10-phosphaphenanthrene as the organic *** impacts of FP-NiPS on the thermal stability,flame retardancy,and mechanical and tribological properties of EP composites were *** findings demonstrated that 5 wt%FP-NiPS elevated the limiting oxygen index of the EP composite from 23.8%to 28.4%,achieving a V-0 rating during vertical burning ***-NiPS could enhance the thermal stability of epoxy resin(EP)and facilitate the development of a dense and continuous carbon layer,thereby significantly improving the fire safety of the EP *** FP-NiPS led to an 8.2%increase in the tensile strength and a 38.8%increase in the elastic modulus of the EP composite,showing outstanding mechanical ***,FP-NiPS showed remarkable potential in enhancing the wear resistance of *** wear rate of 1 wt%FP-NiPS is 2.34×10^(−5) mm^(3)·N^(−1)·m^(−1),a decrease of 66.7%compared to *** work provides a novel promising modification method to enhance the fire safety,mechanical and wear resistance properties of EP.

关键词： nickel phyllosilicate epoxy resin flame retardant wear resistance mechanical property

Cobalt-nitrogen co-doped porous carbon sphere as highly efficient catalyst for liquid-phase cyclohexane oxidation with molecular oxygen and the active sites investigation

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 101-112页

作者： Lei Chen Yuan Sun Jinshan Chi wei Xiong Pingle Liu Fang Hao College of Chemical Engineering National&Local United Engineering Research Centre for Chemical Process Simulation and IntensificationXiangtan UniversityXiangtan411105China

The selective oxidation of cyclohexane to cyclohexanone and cyclohexanol(KA oil)is a challenging issue in the chemical *** present the industrial conversion of cyclohexane to cyclohexanone and cyclohexanol is normally controlled at less than 5%***,the development of highly active and stable catalysts for the aerobic oxidation of cyclohexane is necessary to overcome this low-efficiency ***,we have developed a cobalt-nitrogen co-doped porous sphere catalyst,Co-NC-x(x is the Zn/Co molar ratio,where x=0,0.5,1,2,and 4)by pyrolyzing resorcinol-formaldehyde resin *** achieved 88.28%cyclohexanone and cyclohexanol selectivity and a cyclohexane conversion of 8.88%under *** results showed that the introduction of zinc effectively alleviated the aggregation of Co nanoparticles and optimized the structural properties of the *** addition,Co0 and pyridinic-N are proposed to be the possible active species,and their proportion efficiently increased in the presence of Zn^(2+)*** this study,we developed a novel strategy to design highly active catalysts for cyclohexane oxidation.

关键词： KA oil production cyclohexane selective oxidation cobalt-nitrogen co-doped porous carbon spheres metal-organic framework

Interface-induced polymerization strategy for constructing titanium dioxide embedded carbon porous framework with enhanced chemical immobilization towards lithium polysulfides

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Nano Research 2024年第3期17卷 1473-1481页

作者： Yue Ouyang Xiaoxiao Li Jiexin Zhu wei Zong Yuhang Dai Xuan Gao wei Zhang Shengyuan Yang Roohollah Bagherzadeh Feili Lai Yue-E Miao Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620China The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Advanced Fibrous Materials LAB Institute for Advanced Textile Materials and Technologies(ATMT)School of Advanced Materials and ProcessesAmirkabir University of TechnologyTehran 15914Iran Christopher Ingold Laboratory Department of ChemistryUniversity College London20 Gordon StreetLondon WC1H 0AJUK Department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven 3001Belgium

The shuttle effect induced by soluble lithium polysulfides(LiPSs)is known as one of the crucial issues that limit the practical applications of lithium-sulfur(Li-S)***,a titanium dioxide nanoparticle embedded in nitrogen-doped porous carbon nanofiber(TiO_(2)@NCNF)composite is constructed via an interface-induced polymerization strategy to serve as an ideal sulfur *** the protection of the nanofiber walls,the uniformly dispersed TiO_(2) nanocrystalline can act as capturing centers to constantly immobilize LiPSs towards durable sulfur ***,the mesoporous microstructure in the fibrous framework endows the TiO_(2)@NCNF host with strong physical reservation for sulfur and LiPSs,sufficient pathways for electron/ion transfer,and excellent endurance for volume *** expected,the sulfur-loaded TiO_(2)@NCNF composite electrode presents a fabulous rate performance and long cycle lifespan(capacity fading rate of 0.062%per cycle over 500 cycles)at 2.0 ***,the assembled Li-S batteries harvest superb areal capacity and cycling stability even under high sulfur loading and lean electrolyte conditions.

关键词： interface-induced polymerization electrospun porous nanofibers lithium-sulfur(Li-S)batteries high sulfur loading lithium polysulfides(LiPSs)immobilization

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重要参数对齿轮副承载情况影响规律研究

北京理工大学学报 2011年第2期31卷 131-135,143页

作者：冯慧华董彪尚蛟鲁守卫康黎云北京理工大学机械与车辆学院北京100081 长安汽车股份有限公司汽车工程研究院重庆401120

建立了某轿车变速器一挡传动齿轮副啮合状态有限元分析模型,基于显式动力学理论,对最大转矩工况下该传动副的瞬态啮合过程进行了动力学仿真计算,得到了轮齿齿面与齿根危险区域的主应力、等效应力的幅值与瞬态变化过程等结果.在此基础上... 详细信息

建立了某轿车变速器一挡传动齿轮副啮合状态有限元分析模型,基于显式动力学理论,对最大转矩工况下该传动副的瞬态啮合过程进行了动力学仿真计算,得到了轮齿齿面与齿根危险区域的主应力、等效应力的幅值与瞬态变化过程等结果.在此基础上,研究了发动机输出转矩、齿轮轴刚度、安装误差以及齿根过渡圆角等参数变化对该一挡传动齿轮副轮齿承载状况的影响权重与规律,为以改善强度及可靠性为目标的结构方案修改及工艺参数确定提供了重要参考.

关键词：变速器齿轮副有限元非线性接触瞬态动力学

机械通气新生儿气管导管表面生物膜细菌多样性研究

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中华儿科杂志 2013年第8期51卷 602-606页

作者：宋超余加林艾青刘东陆韦芦起彭宁宁重庆医科大学附属儿童医院新生儿中心儿童发育疾病研究教育部重点实验室儿科学重庆市重点实验室重庆市儿童发育重大疾病诊治与预防国际科技合作基地400014

目的观察机械通气新生儿气管导管表面生物膜细菌群落多样性，探讨以变性梯度凝胶电泳（DGGE）技术为基础的细菌鉴定方法与传统培养法的差异，为临床预防、诊疗细菌性感染提供新思路。方法以重庆医科大学附属儿童医院新生儿中心2011年10... 详细信息

目的观察机械通气新生儿气管导管表面生物膜细菌群落多样性，探讨以变性梯度凝胶电泳（DGGE）技术为基础的细菌鉴定方法与传统培养法的差异，为临床预防、诊疗细菌性感染提供新思路。方法以重庆医科大学附属儿童医院新生儿中心2011年10月至2012年3月经治的26例患儿35根气管导管为研究对象，依靠16SrDNAPCR—DGGE技术，通过quantityone软件分析气管导管表面生物膜中细菌群落多样性，通过T—A克隆测序，了解生物膜中细菌种类分布及常见优势菌。结果35根气管导管经16SrDNAPCR—DGGE所得条带13．8±5．4，香农威纳指数2．42±0．38。16份标本来自7例患儿不同疾病阶段，其中6例患儿气管导管留置天数增加，香农威纳指数减小。6例不同基础疾病患儿的气管导管标本香农威纳指数各不相同。回收24条优势条带克隆测序。35份标本中检出克雷伯菌属100％、假单胞菌属80％、链球菌属77％，91％的标本中存在无法培养的细菌，97％检测到2种以上菌属。80％克雷伯菌属和82％链球菌属中分别与假单胞菌属伴随存在。22例有临床痰培养结果，肺炎克雷伯菌10例（45％），鲍曼不动杆菌2例（9％），阴沟肠杆菌、阴性结果各1例（5％），培养结果均为单菌属。8例痰培养显示“正常菌群”，其对应导管上均检测到克雷伯菌等菌属。结论气管导管表面生物膜中细菌群落具有多样性；16SrDNAPCR—DGGE技术相比培养法更能全面反映气管导管表面细菌群落组成和多样性；克雷伯菌属、假单胞菌属及链球菌属是气管导管表面生物膜中常见菌属，它们在生物膜形成过程中可能存在相互作用。

关键词：呼吸人工插管相关感染生物膜变性梯度凝胶电泳生物多样性