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火电机组水汽中痕量阴离子的毛细管离子色谱法测定

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热力发电 2015年第9期44卷 19-25页

作者：张燕韩秉均唐新建刘国强周少玲高坚侯亚琴国网山东省电力公司电力科学研究院山东济南250002 济南大学资源与环境学院山东济南250002

提出了一种采用毛细管离子色谱法同时测定火电机组水汽中痕量无机阴离子（F^-,Cl^-,SO4^2-,Br^-,NO3^-,NO2^-,PO4^3-）和小分子有机酸根（CH3COO^-,HCOO^-,C2O4^2-）的方法：直接进样10μL;采用IonPac AS18（250 mm×0.4 mm）毛细管离... 详细信息

提出了一种采用毛细管离子色谱法同时测定火电机组水汽中痕量无机阴离子（F^-,Cl^-,SO4^2-,Br^-,NO3^-,NO2^-,PO4^3-）和小分子有机酸根（CH3COO^-,HCOO^-,C2O4^2-）的方法：直接进样10μL;采用IonPac AS18（250 mm×0.4 mm）毛细管离子色谱分析柱;流速为0.010mL/min的kOH淋洗液进行梯度淋洗。采用该方法对上述10种痕量阴离子进行测定。结果表明：采用毛细管离子色谱法检测的10种离子标准曲线线性关系良好,相关系数均大于99.9%,以信噪比S/N=3计算,所测离子检出限在0.04~0.80μg/L之间;连续运行96h后相对标准偏差仍在0.03~5.81%,加标回收率81%~116%。检测结果准确可靠,该方法适用于火电机组水汽检测。

关键词：毛细管离子色谱火电厂水汽痕量阴离子梯度淋洗连续运行检出限

The Impact of Agricultural Practices in China on Land-Atmosphere Interactions

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Advances in Atmospheric Sciences 2011年第4期28卷 821-831页

作者：徐兴奎 Jason k.LEVY State key Laboratory of Earth Surface Processes and resource Ecology Beijing Normal University Institute of Atmospheric Physics Chinese Academy of Science L.Douglas Wilder School of Government and Public Affairs Virginia Commonwealth University Richmond

Human-induced land use changes and the resulting alterations in vegetation features are major but poorly recognized drivers of regional climatic *** order to investigate the impacts of anthropogenically-induced seasonal vegetation cover changes on regional climate in China,harmonic analysis is applied to 1982-2000 National Oceanic and Atmospheric Administration（NOAA） Advanced Very High resolution radiometer（AVVHrr）-derived normalized difference vegetation index（NDVI） time series（ten day interval data）.For two climatic divisions of South China,it is shown that the first harmonic term is in phase with air temperature,while the second and third harmonics are in phase with agricultural *** Penman-Monteith Equation and the Complementary relationship Areal Evapotranspiration（CrAE） model suggest that monthly mean evapotranspiration is out of phase with temperature and precipitation in regions with signiffcant second or third ***,seasonal vegetation cover changes associated with agricultural cultivation are identiffed：for cropped areas,the temperature and precipitation time series have a single maximum value,while the monthly evapotranspiration time series has a bimodal *** is hypothesized that multi-cropping causes the land surface albedo to sharply increase during harvesting,thereby altering the energy distribution ratio and contributing to observed seasonal vegetation cover changes.

关键词： NDVI land surface cover phenologies multi-crop latent heat discrete Fourier transform

Letters to the Editor

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Hepatobiliary & Pancreatic Diseases International 2008年第4期7卷 443-444页

作者： V k kapoor Sanjay Gandhi Postgrad Inst Med Sci Dept Surg Gastroenterol Lucknow 226014 Uttar Pradesh India

The Editor welcomes submissions for possible publication in the Letters to the Editor section that consist of commentary on an article published in the Journal or other relevant issues.

关键词： Letters to the Editor LHD BBS rHD

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重点型号研制过程中的质量管理

航空标准化与质量 2002年第3期 38-40页

作者：六0八研究所六O八研究所

2001年度我所在科研、生产、技改及民品开发方面取得了令人欣慰的成绩。所有这些成绩都是我们努力抓好产品质量的结果,也是对我们质量管理工作的一种肯定。在去年的质量工作中,我们提出了夯实基础,监督到位,落实责任,严格奖惩的工作方针... 详细信息

2001年度我所在科研、生产、技改及民品开发方面取得了令人欣慰的成绩。所有这些成绩都是我们努力抓好产品质量的结果,也是对我们质量管理工作的一种肯定。在去年的质量工作中,我们提出了夯实基础,监督到位,落实责任,严格奖惩的工作方针,取得了一定的成效。下面,就我所重点型号研制质量管理工作,谈几点体会。

关键词：型号研制质量管理部门质量管理工作质量体系运行质量工作质量体系认证质量体系文件科研生产 “三性” 型号设计

Managing Software Testing Technical Debt Using Evolutionary Algorithms

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Computers, Materials & Continua 2022年第10期73卷 735-747页

作者： Muhammad Abid Jamil Mohamed k.Nour Department of Computer Science Umm Al-Qura UniversityMakkahSaudi Arabia

Technical debt(TD)happens when project teams carry out technical decisions in favor of a short-term goal(s)in their projects,whether deliberately or *** must be properly managed to guarantee that its negative implications do not outweigh its advantages.A lot of research has been conducted to show that TD has evolved into a common problem with considerable financial *** technical debt is the technical debt aspect of testing(or test debt).Test debt is a relatively new concept that has piqued the curiosity of the software industry in recent *** this article,we assume that the organization selects the testing artifacts at the start of every *** the latest features in consideration of expected business value and repaying technical debt are among candidate tasks in terms of the testing process(test cases increments).To gain the maximum benefit for the organization in terms of software testing optimization,there is a need to select the artifacts(i.e.,test cases)with maximum feature coverage within the available *** management of testing optimization for large projects is complicated and can also be treated as a multi-objective problem that entails a trade-off between the agile software’s short-term and long-term *** this article,we implement a multi-objective indicatorbased evolutionary algorithm(IBEA)for fixing such optimization *** capability of the algorithm is evidenced by adding it to a real case study of a university registration process.

关键词： Technical debt software testing optimization large scale agile projects evolutionary algorithms multiobjective optimization indicatorbased evolutionary algorithm(IBEA) pareto front

Synthesis and Characterization of Copper Substituted Nickel Nano-Ferrites by Citrate-Gel Technique

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Advances in Materials Physics and Chemistry 2012年第3期2卷 192-199页

作者： r. Sridhar Dachepalli ravinder k. Vijaya kumar Department of Physics Jawaharlal Nehru Technological University Hyderabad College of Engineering Hyderabad India Department of Physics Osmania University Hyderabad India Vignan’s Institute of Technology & Aeronautical Engineering College Deshmukhi India

Mixed Copper substituted Nickel nano-ferrites having the chemical formula Ni1-xCuxFe2O4 (where x = 0, 0.2, 0.4, 0.6, 0.8, 0.9 and 1.0) were synthesized by citrate gel technique. The crystal structure characterization and morphology were investigated by X-ray diffraction (XrD) and Scanning Electron Microscopy (SEM). An elemental composition of the samples were studied by energy dispersive X-ray Spectroscopy (EDS). Lattice parameter, X-ray density, Volume of the Unit Cell and The values of the hopping length for octahedral (dB) and tetrahedral (dA) sites were calculated. The observed results can be explained on the basis of composition.

关键词： Ferrites Nano-Materials X-ray Diffraction SEM EDS

Effects of Chios mastic gum on cardiometabolic risk factors

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World Journal of Diabetes 2022年第11期13卷 921-925页

作者： Athanasia k Papazafiropoulou The First Department of Internal Medicine and Diabetes Center Tzaneio General Hospital of PiraeusPiraeus 18536Greece

Chios mastic gum(CMG),the resin produced by the trunk of Pistachia lentiscus var Chia,has been used for culinary and medicinal purposes since *** the fact that Pistacia species are widely distributed throughout the Mediterranean basin and in the circum-Mediterranean regions,CMG is a distinctive resin of the mastic trees grown exclusively in the southern part of the island of *** has been used for centuries as a spice,a cosmetic,but its most important usage has been as a strong phytotherapeutic therapy,primarily for the management of gastrointestinal ***,there are studies demonstrating that CMG has hypolipidemic,cardioprotective and antidiabetic ***,the aim of the present review is to summarize the existing literature data regarding the potential beneficial effects of CMG on cardiometabolic risk factors.

关键词： Chios mastic gum Glucose Cardioprotection Low-density lipoproteincholesterol Triglycerides

Disk Bimorph-Type Piezoelectric Energy Harvester

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Journal of Power and Energy Engineering 2015年第4期3卷 63-68页

作者： V. Tsaplev r. konovalov k. Abbakumov Department of Electroacoustics and Ultrasonic Engineering Saint-Petersburg State Electrotechnical University Saint-Petersburg Russia Department of Physics North-West Open Technical University Saint-Petersburg Russia

The study of the experimental investigation of a disk-type piezoelectric energy harvester presented. The harvester contains disk bimorph piezoceramic element of the umbrella form and contains two disk PZT plates. The element is excited at the base point at its center. The element is supplied by a loading ring mass to decrease its resonance frequency. The dependences of the vibration displacement along the radii of the bimorph and the ring mass from the frequency of excitation are presented and the output voltage frequency response is also presented as well. The idle mode and the load duty are investigated. The value of the internal resistance of the harvester is obtained using the load characteristic. The piezoelectric specific power is estimated experimentally.

关键词： Piezoelectric Energy Harvester Umbrella Bimorph Plate amplitude-Frequency Characteristic Flexural Vibration Specific Power Output Voltage

Hybrid Trust Based reputation Mechanism for Discovering Malevolent Node in MANET

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Computer Systems Science & Engineering 2023年第3期44卷 2775-2789页

作者： S.Neelavathy Pari k.Sudharson Department of Computer Technology Anna UniversityChennai600025India Department of Information Technology Velammal Insitutue of TechnologyChennai601204India

A self-contained connection of wireless links that functions without any infrastructure is known as Mobile Ad Hoc Network(MANET).A MANET’s nodes could engage actively and dynamically with one ***,MAN-ETs,from the other side,are exposed to severe potential threats that are difficult to counter with present security *** a result,several safe communication protocols designed to enhance the secure interaction among MANET *** this research,we offer a reputed optimal routing value among network nodes,secure computations,and misbehavior detection predicated on node’s trust levels with a Hybrid Trust based reputation Mechanism(HTrM).In addition,the study designs a robust Public key Infrastructure(PkI)system using the suggested trust evaluation method in terms of“key”generation,which is a crucial component of a PkI *** also concentrate on the solid node authenticating process that relies on *** ensure edge-to-edge security,we assess safe,trustworthy routes to secure computations and authenticate mobile nodes,incorporating uncertainty into the trust management *** compared to other protocols,our recommended approach performs ***,we use simulations data and performance evaluation metrics to verify our suggested approach’s validity Our approach outperformed the competing systems in terms of overall end-to-end delay,packet delivery ratio,performance,power consumption,and key-computing time by 3.47%,3.152%,2.169%,and 3.527%,3.762%,significantly.

关键词： Mobile ad-hoc network trust management secure authentication reputation mechanism secure routing