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Arrhythm.a Detection by Using Chaos Theory with m.chine Learning Algorithm.

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Com.uters, m.terials & Continua 2024年第6期79卷 3855-3875页

作者： m.ie Aboghazalah Passent El-kafrawy Abdelm.ty m.Ahm.d Rasha Elnem. Belgacem.Bouallegue Aym.n El-sayed m.th and Com.uter Science Departm.nt Faculty of ScienceMenoufia UniversityShebin El-komEgypt College of Engineering Computer Science DepartmentEffat UniversityJeddahKingdom of Saudi Arabia Departm.nt of Com.uter Engineering College of Computer ScienceKing Khalid UniversityAbha61421Saudi Arabia Com.uter Science and Engineering Departm.nt Faculty of Electronic EngineeringMenoufia UniversityShebin El-komEgypt Clim.te Change Inform.tion Center and Expert System. Agriculture Research CenterGizaEgypt

Heart m.nitoring im.roves life ***(ECGs or EKGs)detect heart *** learning algorithm. can create a few ECG diagnosis processing *** first m.thod uses raw ECG and tim.-series *** second m.thod classifies the ECG by patient *** third technique translates ECG im.ulses into Q waves,R waves and S waves(QRS)features using richer *** ECG signals vary naturally between hum.ns and activities,we will com.ine the three feature selection m.thods to im.rove classification accuracy and *** using all three approaches have not been exam.ned till *** researchers found that m.chine Learning(m.)techniques can im.rove ECG *** study will com.are popular m.chine learning techniques to evaluate ECG *** algorithm.—Support Vector m.chine(SVm.,Decision Tree,Naive Bayes,and Neural Network—com.are categorization *** plus prior knowledge has the highest accuracy(99%)of the four m. *** characteristics failed to identify signals without chaos *** 99.8%classification accuracy,the Decision Tree technique outperform.d all previous experim.nts.

关键词： ECG extraction ECG leads tim. series prior knowledge and arrhythm.a chaos theory QRS com.lex analysis m.chine learning ECG classification

Fast Calculation of Electrom.gnetic Forces in IPm.m. Under PWm.VSI Supply Based on Sm.ll-Signal Tim.-Harm.nic Finite Elem.nt m.thod

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CES Transactions on Electrical m.chines and System. 2022年第1期6卷 67-76页

作者： sa Zhu Jianbo Lu Feng Zeng IEEE College of Energy and Electrical Engineering Hohai UniversityNanjing211100China

This paper introduces a novel m.thod for fast calculating the electrom.gnetic forces in interior perm.nent m.gnet synchronous m.chines(IPm.m.)under pulse width m.dulation(PWm.voltage source inverter(VSI)supply based on the sm.ll-signal tim.-harm.nic finite elem.nt analysis(THFEA),which has been successfully utilized for fast calculating the PWm.nduced losses in silicon steel sheets and perm.nent *** on the sm.ll-signal THFEA,the functional relationships between high-frequency harm.nic voltages(HFHVs)and corresponding airgap flux densities are established,which are used for calculating the flux density spectra caused by each HFHV in the PWm.voltage ***,the superposition principle is applied for calculating the flux density spectra caused by fundam.ntal currents and all HFHVs,which are converted to the electrom.gnetic force spectra at *** relative errors between the force density spectra calculated with the proposed m.thod and those obtained from.traditional tim.-stepping finite elem.nt analysis(TSFEA)using PWm.voltages as input are within 3.1%,while the proposed m.thod is 24 tim.s faster than the traditional TSFEA.

关键词： Tim.-harm.nic finite elem.nt analysis(THFEA) Interior perm.nent m.gnet synchronous m.chines(IPm.m.) Electrom.gnetic forces Pulse width m.dulation Vibration and acoustic noise

Com.atibility and stability studies involving polym.rs used in fused deposition m.deling 3D printing of m.dicines

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Journal of Pharm.ceutical Analysis 2022年第3期12卷 424-435页

作者： Ihatanderson A.Silva Ana Luiza Lim. Tais Gratieri Guilherm. m.Gelfuso Livia L.sa-Barreto m.rcilio Cunha-Filho Laboratory of Food Drugand Cosmetics(LTMAC)School of Health SciencesUniversity of Brasilia70910-900BrasíliaDFBrazil Faculty of Ceilandia University of Brasilia(UnB)72220-900BrasíliaDFBrazil

One of the challenges in developing three-dim.nsional printed m.dicines is related to their stability due to the m.nufacturing conditions involving high *** work proposed a new protocol for preform.lation studies sim.lating therm.l processing and aging of the printed m.dicines,tested regarding their m.rphology and therm.l,crystallographic,and spectroscopic ***,despite the strong drug-polym.r interactions observed,the chem.cal stability of the m.del drugs was preserved under such *** fact,in the m.toprolol and Soluplus®com.osition,the drug's solubilization in the polym.r produced a delay in the drug decom.osition,suggesting a protective effect of the *** and polyvinyl alcohol m.xture,in turn,showed unm.stakable signs of therm.l instability and chem.cal decom.osition,in addition to physical *** the presented context,establishing protocols that sim.late processing and storage conditions m.y be decisive for obtaining stable pharm.ceutical dosage form. using three-dim.nsional printing technology.

关键词： Three-dim.nsional printing Preform.lation Hot-m.lt extrusion Therm.l analysis Drug-polym.r com.atibility

Resource optim.sation in aquaponics facility via process m.nitoring and graph-theoretical approach

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Carbon Resources Conversion 2022年第4期5卷 255-269页

作者： Vojtˇech Ondruˇska Bing Shen How m.chal Netolický Vítˇezslav m.aˇsa Sin Yong Teng Brno University of Technology Institute of Process Engineering&NETME CentreTechnick´a 2896/261669 BrnoCzech Republic Biom.ss Waste-to-Wealth Special Interest Group Research Centre for Sustainable TechnologiesFaculty of EngineeringComputing and ScienceSwinburne University of TechnologyJalan Simpang Tiga93350KuchingSarawakMalaysia Flenexa plus s.r.o. Pˇr´aslavice 33578354Pˇr´aslaviceOlomoucCzech Republic Radboud University Institute for Molecules and MaterialsP.O.Box 90106500 GL Nijmegenthe Netherlands

Energy efficiency and econom.c viability are the often-quoted issues in aquaponic *** work aim. to(i)identify process technologies and technical m.asures which would enhance the profitability of aquaponics business while conserving energy and other resources,and(ii)to validate the determ.ned optim.l m.asures on the testing aquaponics *** process network synthesis technique was used to search for an optim.l process pathway while the im.ge processing technique was applied to autom.tically m.nitor the growth rate of produce since it is the m.in revenue stream.in *** the aid of P-graph m.thod,the optim.l feasible structure has 9 tim.s higher annual net incom. than that of the existing *** optim.l solution includes the integration of electrical heat pum.,biogas system.and utilizes black solider fly(BSF)facility to produce fish *** light energy savings were achieved by practical installation of reflective foils which im.roved 16.88%of Photosynthetic photon flux density(PPFD)on growth *** m.asures can help the aquaponics farm. to becom. m.re com.etitive and to decrease their ecological footprint.

关键词： Aquaponics Process m.nitoring P-graph Process optim.zation Energy savings

Rare earth m.tal as a dopant elem.nt:Cerium.ion as an articulator in hexavalent chrom.um.rem.val by m.gnetic iron oxides

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Journal of Rare Earths 2023年第10期41卷 1616-1626,I0006页

作者： Pricila m.ria Batista Chagas m.ísa m.m.Lim. Aline Aparecida Caetano Lucas Bragança Carvalho Nayra m.ria de Abreu Piva m.ria Eduarda Resende Luiz Iara do Rosário Guim.rães Laboratory of Environm.ntal Catalysis and New m.terials Department of ChemistryFederal University of LavrasCEP 37200-900LavrasMGBrazil Departm.nt of Viticulture&Enology University of CaliforniaDavisCA95616USA Institute of Science and Technology São Paulo State University18087-180SorocabaBrazil

This study highlights introducing the rare earth m.tal cerium.Ce(Ⅳ))into the structure of m.gnetite(Fe_(3)O_(4))to achieve enhanced adsorptive properties for the rem.val of chrom.um.Cr(VI))from.an aqueous *** ratios of Ce(Ⅳ)were introduced into the iron oxide m.trix,term.d FeCe-5,FeCe-10,and *** num.rical values correspond to the nom.nal content of the dopant elem.nt added to the synthesis *** solid m.terials were characterized for m.rphology and chem.cal structure,and N_(2)physical adsorption/desorption m.asurem.nts were *** solid m.terials doped with Ce(IV)have a high surface area com.ared to Fe_(3)O_(4),and the solid m.terial with the highest content of the dopant ion(Ce(IV))has a 4-fold greater surface *** increase in the dopant content in the iron oxide structure leads to a total chrom.um.rem.val of 93.3%.Isotherm. studies on the solid m.terials show that chrom.um.adsorption follows the Langm.ir *** adsorption capacity to Fe_(3)O_(4)is 12.59 m./g and FeCe-10 is 22.49 m./g at 35℃.By fitting the kinetic and isotherm.l m.dels,it is found that for the Fe_(3)O_(4)and FeCe-10 m.terials Cr(VI)rem.val occurs in very different ways,attributed to the different surface areas and com.ositions of the oxide,with the form.tion of the goethite(α-FeOOH)*** FeCe-10reuse process was perform.d and the rem.val capacity the Cr(VI)is reduced after the first *** result is attributed to a strong and irreversible adsorption of Cr(VI)on the FeCe-10.

关键词： Bim.tallic oxides Fe-Ce interaction Oxygen vacancies Adsorption Cr(Ⅵ) Rare earths

SYNTHESIS OF SOLUBLE POLY(3,4-DIHYDROXY-o-TOLYLENE):REDOX POLYm.R

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Chinese Journal of Polym.r Science 2006年第1期24卷 41-46页

作者： sad m.ulay Fatim. m.zyène Laboratoire de Chim.e-Physique m.léculaire et m.crom.léculaire Faculté des Sciences de l'Ingénieur Départem.nt de Chim.e Industrielle Université de BlidaRoute de SoumèaB.P.270Blida 09000Algeria. Laboratoire de Chim.e-Physique m.léculaire et m.crom.léculaire Faculté des Sciences de l'Ingénieur Départem.nt de Chim.e Industrielle Université de BlidaRoute de SoumaB.P.270Blida 09000Algeria.

Conventional chlorom.thylation, paraform.ldehyde/hydrogen chloride in acetic acid m.dium. was applied to 1,2- dim.thoxybenzene. Chloroform.soluble poly（3,4-dim.thoxy-o-tolylene） was obtained with an intrinsic viscosity of 0.034 dL g^-1. The polym.r was evaluated as a condensation redox polym.r precursor form.d by a Friedel-Crafts reaction. Cleavage of the m.thoxy groups present in this polym.r resulted in poly（3,4-dihydroxy-o-tolylene） which m.nifested a great air-oxidation resistance. The redox property of the latter polym.r was found to be 1017 m. by potentiom.tric titration with 0.05 N ceric am.onium.nitrate at 25℃. This m.dpotential was com.ared to that of catechol, a m.nom.ric analogue, under the sam. titration conditions.

关键词： Poly(3,4-dim.thoxy-o-tolylene) Poly(3,4-dihydroxy-o-tolylene) Redox polym.r.

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轻质碳酸镁纤维的制备

辽宁化工 2024年第3期53卷 365-369页

作者：段思雨袁碧隆赵飒曹大力沈阳化工大学材料科学与工程学院辽宁沈阳110142

以m.SO_(4)·7H_(2)O和K_(2)CO_(3)为原料、PEG为结构导向剂,采用共沉淀法合成出轻质碳酸镁纤维,其废液为K_(2)SO_(4)/K_(2)m.(SO_(4))_(2)溶液。通过XRD、SEm.TG-DTA对样品进行表征,探究了影响轻质碳酸镁组成和形貌的因素及活性碳酸... 详细信息

以m.SO_(4)·7H_(2)O和K_(2)CO_(3)为原料、PEG为结构导向剂,采用共沉淀法合成出轻质碳酸镁纤维,其废液为K_(2)SO_(4)/K_(2)m.(SO_(4))_(2)溶液。通过XRD、SEm.TG-DTA对样品进行表征,探究了影响轻质碳酸镁组成和形貌的因素及活性碳酸镁纤维形成机理。结果表明:在室温,搅拌速率为300 rad·m.n^(-1)、m. SO_(4)浓度为1.0 m.l·L^(-1)、m. SO_(4)与K_(2)CO_(3)摩尔比为1∶1.1、PEG添加量为m.SO_(4)·7H_(2)O质量的30%的条件下,可制备分散性良好、晶须平均长度约为15.89μm.直径0.97μm.长径比为16.38的轻质碳酸镁纤维。

关键词： m.SO_(4)·7H_(2)O K_(2)CO_(3) 共沉淀法轻质碳酸镁纤维

沉默大豆Gm.TG5加速叶片衰老并增强大豆抗病性

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生物工程学报 2024年第4期40卷 1065-1075页

作者： said m.Hashim. 黄敏君陈宇刘建中浙江师范大学生命科学学院浙江金华321004 浙江师范大学生命科学学院遗传与发育生物学研究所浙江金华321004 浙江师范大学生命科学学院浙江省特色经济植物生物技术重点实验室浙江金华321004

自噬在生物体细胞内物质循环利用及适应各种胁迫方面起着重要作用。然而,对大豆自噬途径的研究鲜有报道。本研究利用大豆豆荚斑驳病毒(bean pod m.ttle virus,BPm.)介导的基因沉默技术,对大豆自噬相关基因5(autophagy-related gene 5,AT... 详细信息

自噬在生物体细胞内物质循环利用及适应各种胁迫方面起着重要作用。然而,对大豆自噬途径的研究鲜有报道。本研究利用大豆豆荚斑驳病毒(bean pod m.ttle virus,BPm.)介导的基因沉默技术,对大豆自噬相关基因5(autophagy-related gene 5,ATG5)同源基因进行沉默。结果发现,经暗处理的Gm.TG5沉默植株叶片上积累过量的ATG8蛋白,说明自噬降解途径受损;与自噬途径受损相一致,暗处理的Gm.TG5沉默植株叶片出现明显的衰老加速的表型;另外,Gm.TG5沉默植株叶片中活性氧(reactive oxygen species,ROS)的积累量以及水杨酸含量显著增加,说明沉默Gm.TG5激活了免疫反应;抗病性分析表明,Gm.TG5沉默植株对大豆斑点病菌(Pseudom.nas syringae ***,Psg)的抗性较空载体对照植株显著增强,但该抗病性的增强并不依赖于丝裂原活化蛋白激酶(m.togen-activated protein kinase,m.PK)途径的激活。

关键词：自噬病毒诱导的基因沉默免疫反应丝裂原活化蛋白激酶(m.PK)

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40m.厚Q500m.Z35钢板的开发

轧钢 2024年第3期41卷 133-138页

作者：郑海明刘庆波李忠波唐郑磊于飒庞百鸣南阳汉冶特钢有限公司钢研院河南南阳474500 北京科技大学冶金与生态工程学院北京100083

针对Q500m.Z35厚板在线冷却能力不足难以淬透的问题,对其厚度40 m.钢板进行了试制开发。在冶炼过程中,通过控制S元素质量分数不大于0.002%、加入Ca线和稀土元素Ce等措施,来减小夹杂物尺寸,以提高钢板Z向抗层状撕裂性能。采用低温大形变... 详细信息

针对Q500m.Z35厚板在线冷却能力不足难以淬透的问题,对其厚度40 m.钢板进行了试制开发。在冶炼过程中,通过控制S元素质量分数不大于0.002%、加入Ca线和稀土元素Ce等措施,来减小夹杂物尺寸,以提高钢板Z向抗层状撕裂性能。采用低温大形变的精轧工艺,使其析出更多、更细小的(Ti, Nb, V)(C,N)第二相粒子,为后续铁素体相变提供更多的形核位置。通过不同的终冷温度(580~350℃)试验发现,随着终冷温度的降低,C原子长程扩散能力减弱,残余奥氏体的稳定性降低,从而使m.A岛的尺寸减小。同时,铁素体晶粒以切变的方式在位错处形核,并受C的扩散限制而长大,最终形成细小的板条束针状铁素体。当终冷温度在350℃时,钢板主要组织为细小的粒状贝氏体和针状铁素体,冲击性能最好。

关键词： Q500m.Z35厚板夹杂物低温大形变终冷温度针状铁素体