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理论电工学引论

理论电工学引论

Anticancer and Antioxidant Activities of Some Algae from Western Libyan Coast

1965年

作者：（德）k.屈普夫谬勒林争辉等译

据俄译本转译,并据德文原书第七版作了全面校订.

ISBN: (数字)15010.1169

ISBN: (纸本)K15010·1169

据俄译本转译,并据德文原书第七版作了全面校订.

关键词：电工学

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Natural Science 2018年第7期10卷 232-246页

作者： Rabia Alghazeer Nazlin k. Howell Mahboba B. El-Naili Nuri Awayn Department of Chemistry Faculty of Sciences University of Tripoli Tripoli Libya Faculty of Health and Medical Sciences School of Biosciences and Medicine University of Surrey Guildford England UK

Seaweeds are considered as one of the largest biomass producers in marine environment that is rich in bioactive metabolites and a source of natural ingredients for functional foods. The potential antioxidant activity and the potential inhibition of Caco2 cell proliferation, of crude extracts of: Chlorophyta (Ulva lactuca, and Codium tomentosum), Phaeophyta (Cystoseira crinita, Cystoseira stricta, and Sargassum vulgare), and Rhodophyta (Gelidium latifolium, Hypnea musciformis, and Jania rubens) were collected from western Libyan coast and evaluated in vitro. The antioxidant activity was determined by reducing power and DPPH assays while cell proliferation, morphological changes and the cell cycle arrest were assessed by MTT, inverted light microscope and flow cytometry methods respectively. The polyphenols and flavonoids rich extracts showed remark.ble reducing power and antiradical properties. After exposure of Caco2 cells to various concentrations of extracts (50, 100, 150 and 200 μg/mL) especially from brown algae for 72 h, cell proliferation was reduced significantly. The antiproliferative effect of algae extracts was correlated with their polyphenol and flavonoid contents. Cell cycle analysis further showed that cells were arrested in G phases along with an increment in sub-diploidal cell population (sub-G) after extract application. These results imply that seaweeds which are rich in bioactive compounds may be used in anticancer drug research programs. However, further investigations are essential to reveal the molecular mechanisms of the anticancer activities of these algae.

关键词： Polyphenols Flavonoids Seaweeds Antioxidant Activity Anticancer Activity

Design of Type-1 and Interval Type-2 Fuzzy PID Control for Anesthesia Using Genetic Algorithms

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Journal of Intelligent Learning Systems and Applications 2014年第2期6卷 70-93页

作者： Hugo Araujo Bo Xiao Chuang Liu Yanbin Zhao H. k. Lam Department of Informatics King’s College London London UK

This paper presents the automatic drug administration for the regulation of bispectral (BIS) index in the anesthesia process during the clinical surgery by controlling the concentration target of two drugs, namely, propofol and remifentanil. To realize the automatic drug administration, real clinical data are collected for 42 patients for the construction of patients’ models consisting of pharmacok.netic and pharmacodynamic models describing the dynamics reacting to the input drugs. A nominal anesthesia model is obtained by tak.ng the average of 42 patients’ models for the design of control scheme. Three PID controllers are employed, namely linear PID controller, type-1 (T1) fuzzy PID controller and interval type-2 (IT2) fuzzy PID controller, to regulate the BIS index using the nominal patient’s model. The PID gains and membership functions are obtained using genetic algorithm (GA) by minimizing a cost function measuring the control performance. The best trained PID controllers are tested under different scenarios and compared in terms of control performance. Simulation results show that the IT2 fuzzy PID controller offers the best control strategy regulating the BIS index while the T1 fuzzy PID controller comes the second.

关键词： Anesthesia Propofol Remifentanil BIS PID Fuzzy Control Simulation Close-Loop

Crystal Structure of BaxSr1-xTiO3Fine Powder

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Journal of Modern Physics 2015年第1期6卷 70-77页

作者： Natheer B. Mahmood Emad k. Al-Shak.rchi Brahim Elouadi Xavier Feaugas Physics Department College of Science Al-Nahrain University Baghdad Iraq Laboratoire des Sciences de l’Ingénieur pour l’Environnement Université de La Rochelle La Rochelle France

Various compositions of the system BaxSr1-xTiO3 (BST) have been elaborated both as fine powders and ceramic monoliths, using the co-precipitation route within a warmed supersaturated solution of oxalic acid. The appropriate stoichiometry was determined from the mixtures of precisely titrated aqueous solutions of cations chlorides (SrCl2, BaCl2, and TiCl4). The reason of this process was to apply low sintering temperature in production of BST samples with ultra-fine powders. These powders primarily calcined at (850°C) for (5 hr) were used to elaborate ceramics after pellets sintering at (1200°C) during (8 hrs). Indeed, XRD patterns were confirmed that the samples are a pure phase and a perovsk.te cubic structural type at (x = 0, 0.5, 0.6). Whereas, (x = 0.7, 0.8, 0.9, 1) showed a tetragonal phase. There is agreement between the FTIR and XRD analysis, by the relation of the wave vector (k. and lattice constant. It was deduced a stimulated relation between (x) and (k.. The results of TEM, they were clear that the lowest particle sizes investigated of BST powders nearly (36 - 50 nm).

关键词： Barium Strontium Titanate Oxalate Co-Precipitation Method X-Ray Diffraction Transmission Electron Microscope Ultra-Fine Powder

Microelectronic Circuits 5th ed.

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Energy Efficient Hyperparameter Tuned Deep Neural Network.to Improve Accuracy of Near-Threshold Processor

2004年

作者： Adel S. Sedra k. C. Smith

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Intelligent Automation & Soft Computing 2023年第7期37卷 471-489页

作者： k.Chanthirasek.ran Raghu Gundaala Department of Electronics and Communication Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesChennai602105TamilnaduIndia

When it comes to decreasing margins and increasing energy effi-ciency in near-threshold and sub-threshold processors,timing error resilience may be viewed as a potentially lucrative alternative to *** the other hand,the currently employed approaches have certain restrictions,including high levels of design complexity,severe time constraints on error consolidation and propagation,and uncontaminated architectural registers(ARs).The design of near-threshold circuits,often k.own as NT circuits,is becoming the approach of choice for the construction of energy-efficient digital *** a result of the exponentially decreased driving current,there was a reduction in performance,which was one of the *** studies have advised the use of NT techniques to chip multiprocessors as a means to preserve outstanding energy efficiency while minimising performance *** the past several years,there has been a clear growth in interest in the development of artificial intelligence hardware with low energy consumption(AI).This has resulted in both large corporations and start-ups producing items that compete on the basis of varying degrees of performance and energy *** technology’s ultimate goal was to provide levels of efficiency and performance that could not be achieved with graphics processing units or general-purpose *** achieve this objective,the technology was created to integrate several processing units into a single *** accomplish this purpose,the hardware was designed with a number of unique *** this study,an Energy Effi-cient Hyperparameter Tuned Deep Neural Network.EEHPT-DNN)model for Variation-Tolerant Near-Threshold Processor was *** order to improve the energy efficiency of artificial intelligence(AI),the EEHPT-DNN model employs several AI *** notion focuses mostly on the repercussions of embedded technologies positioned at the network.s *** presented model employs a deep stack.d sparse autoencod

关键词： Deep learning hyperparameter tuning artificial intelligence near-threshold processor embedded system

Geochemistry and geochronology of A-type basement granitoids in the north-central Aravalli Craton: Implications on Paleoproterozoic geodynamics of NW Indian Block

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Geoscience Frontiers 2021年第4期12卷 138-150页

作者： Manoj k.Pandit Hitesh k.mar WeiWang Department of Geology University of RajasthanJaipur 302004India Department of Mines and Geology Government of RajasthanJaipurRajasthanIndia State k.y Laboratory of Geological Processes and Mineral Resources School of Earth Sciences and ResourcesChina University of GeosciencesWuhan 430074China

The basement granite gneisses from the north-central Aravalli Craton in NW India were investigated for geochemistry and *** a peneplain terrain,the granite gneiss outcrops are scanty and samples were collected mainly from two small hills and several ground-level exposures in the Sak.un–Ladera *** granite gneiss is the dominant lithology that also hosts dark.lenticular enclaves,and is in turn,intruded by mafic *** granite gneiss has silica content ranging from 61.37 wt.%to 68.27 wt.%that mark. a slight overlap with the enclaves(54.32wt.%to 62.17wt.%).Both groups have a highk.O/Na2O(~2 or higher)***,the granite gneiss classify as granite–granodiorite,and enclaves as *** In-situ LA-ICP-MS zircon U–Pb geochronology of granite gneiss has yielded a statistically valid 1721±9 Ma age that we interpret as the emplacement age for the granitic *** characteristics of granite gneiss underline fractional crystallization of an I-type melt as themain process,and continuity of trends in enclaves underlines their mutual genetic *** genetic association is further verified by a consistency in the trace element characteristics and REE *** Nd-isotope signatures define a single grouping for both granite gneiss and enclaves,withεNd(t)values ranging from−6.38 to−6.61,further substantiating a common *** geochemical tectonic discrimination schemes consistently point toward an extensional setting and A-type characteristics for granite gneiss and *** are analogous to the coeval(1.72–1.75 Ga),A-type granitoids from the k.etri and Alwar basin in the North Delhi Fold Belt,implying a much larger areal extent for the Paleoproterozoic anorogenic magmatism in the northern segment of the Aravalli *** Paleoproterozoic age for the presumed‘Archean’basement in this region offers tacit evidence that the BGC–II is a stratigraphically younger terrane as compared to the Archean age,

关键词： Basement granite Geochemistry Zircon U–Pb geochronology A-type granites Aravalli Craton NWIndian Block

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矿井卷扬机电子安全监控系统

煤炭科学技术 1991年第6期19卷 51-55页

作者： Roger k. L. Davies 梁巨光

英国马卡姆煤矿(Mark.am Colliery)于1973年由于卷扬机钢绳过卷,单线制动杆失效,致使双层罐笼坠井,造成严重伤亡事故。本文就这次事故后,对电子卷扬监控系统所提出的各项要求而进行的研制情况。马卡姆事故调查的意见之一是要求英国所有... 详细信息

英国马卡姆煤矿(Mark.am Colliery)于1973年由于卷扬机钢绳过卷,单线制动杆失效,致使双层罐笼坠井,造成严重伤亡事故。本文就这次事故后,对电子卷扬监控系统所提出的各项要求而进行的研制情况。马卡姆事故调查的意见之一是要求英国所有的卷扬机取缔单线系统的安全监测装置,必须采用双线工作系统。改进设计的构思集中于把自动化安全机构用于超速卷扬和过卷的保护。现有的控制器是一种机械式模拟装置。

关键词：矿井卷扬机安全电子监控系统

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接地故障中和器全补偿技术及应用

供用电 2015年第6期32卷 24-29页

作者：王宇波 k.aus winter Swedish Neutral AB

目前世界上普遍应用的配电系统消弧线圈接地方式在一定程度上保证了系统的供电可靠性,但仍然存在接地残流较大和高阻型故障检测难等问题。GFN(接地故障全中和器)具有消除接地电流、准确定位故障点,以及提升供电稳定性和可靠性的作用。... 详细信息

目前世界上普遍应用的配电系统消弧线圈接地方式在一定程度上保证了系统的供电可靠性,但仍然存在接地残流较大和高阻型故障检测难等问题。GFN(接地故障全中和器)具有消除接地电流、准确定位故障点,以及提升供电稳定性和可靠性的作用。介绍了瑞典GFN接地故障全补偿技术的基本原理、功能特点、应用实例和功能扩展等。实用情况表明GFN接地故障全补偿技术可以较为成功地减少特殊瞬时故障。

关键词：接地故障中性点消弧线圈接地故障中和器配电系统