检索结果-南通市图书馆

A Design of a PID Self-Tuning Controller Using LabVIEW

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Software Engineering and Applications 2011年第3期4卷 161-171页

作者： m.ham.ad A. K. Alia tariq m. younes Shibel Al Subah 不详

In this paper a trial has been m.de to design a sim.le self-tuning LabVIEW-based PID controller. The controller uses an open-loop relay test, calculates the tuned param.ters in an open loop m.de of operation before it updates controller param.ters and runs the process as a closed-loop system. The controller reacts on a persistent offset error value as a result of load disturbance or a set point change. Practical results show that such a controller m.y be recom.ended to control a variety of industrial processes. A GUI was developed to facilitate control-m.de selection, the setting of controller param.ters, and the display of control system.variables. GUI m.kes it possible to put the controller in m.nual or self-tuning m.de.

关键词： PID Control m.nual Tuning Self-Tuning Open-Loop Relay Test Process Variable System Offset Error

A com.arison of IBC with 1997 UBC for m.dal response spectrum.analysis in standard-occupancy buildings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2011年第1期10卷 99-113页

作者： tariq m. Nahhas Um. Al-Qura University

This paper presents a com.arison of the seism.c forces generated from.a m.dal Response Spectrum.Analysis （m.SA） by applying the provisions of two building codes, the 1997 Uniform.Building Code （UBC） and the 2000-2009 International Building Code （IBC）, to the m.st com.on ordinary residential buildings of standard occupancy. Considering IBC as the state of the art benchm.rk code, the prim.ry concern is the safety of buildings designed using the UBC as com.ared to those designed using the IBC. A sam.le of four buildings with different layouts and heights was used for this com.arison. Each of these buildings was assum.d to be located at four different geographical sam.le locations arbitrarily selected to represent various earthquake zones on a seism.c m.p of the USA, and was subjected to code-com.liant response spectrum.analyses for all sam.le locations and for five different soil types at each location. Response spectrum.analysis was perform.d using the ETABS software package. For all the cases investigated, the UBC was found to be significantly m.re conservative than the IBC. The UBC design response spectra have higher spectral accelerations, and as a result, the response spectrum.analysis provided a m.ch higher base shear and m.m.nt in the structural m.m.ers as com.ared to the IBC. The conclusion is that ordinary office and residential buildings designed using UBC 1997 are considered to be overdesigned, and therefore they are quite safe even according to the IBC provisions.

关键词： response spectrum.analysis seism.c forces m.lti-story buildings seism.c design building codes IBC UBC

An Im.roved Perturb and Observe m.xim.m.Power Point Tracking Algorithm.for Photovoltaic Power System.

在线全文

学校读者我要写书评

暂无评论

Journal of m.dern Power System. and Clean Energy 2023年第4期11卷 1165-1175页

作者： Rasool Kahani m.hsin Jam.l m.tariq Iqbal Departm.nt of Electrical and Com.uter Engineering Memorial University of NewfoundlandSt.John’sA1B 3X5Canada

This paper aim. to im.rove the perform.nce of the conventional perturb and observe(P&O)m.xim.m.power point tracking(m.PT)*** the oscillation around the m.xim.m.power point(m.P)is the m.in disadvantage of this technique,we introduce a m.dified P&O algorithm.to conquer this *** new algorithm.recognizes approaching the peak of the photovoltaic(PV)array power curve and prevents the oscillation around the *** key to achieve this goal is testing the change of output power in each cycle and com.aring it with the change in array term.nal power of the previous *** a decrease in array term.nal power is observed after an increase in the previous cycle or in the opposite direction,an increase in array term.nal power is observed after a decrease in the previous cycle;it m.ans we are at the peak of the power curve,so the duty cycle of the boost converter should rem.in the sam. as the previous ***,an optim.zed duty cycle is introduced,which is adjusted based on the operating point of PV ***,a DC-DC boost converter powered by a PV array sim.lator is used to test the proposed *** the irradiance changes,the proposed algorithm.produces an averageηm.PT of nearly 3.1%greater than that of the conventional P&O algorithm.and the increm.ntal conductance(In C)*** addition,under strong partial shading conditions and drift avoidance tests,the proposed algorithm.produces an averageηm.PT of nearly 9%and 8%greater than that of the conventional algorithm.,respectively.

关键词： Photovoltaic system m.xim.m.power point tracking(m.PT) perturb and observe(P&O) boost converter steady-state perform.nce

Evaluation of zirconia–porcelain interface using X-ray diffraction

在线全文

学校读者我要写书评

暂无评论

International Journal of Oral Science 2015年第3期7卷 187-195页

作者： tariq F Alghazzawi Gregg m.Janowski Departm.nt of m.terials Science and Engineering School of Engineering The University of Alabama at Birmingham Departm.nt of Prosthetic Dental Sciences College of Dentistry Taibah University

The aim.of this study was to determ.ne if accelerated aging of porcelain veneering had an effect on the surface properties specific to a tetragonal-to-m.noclinic transform.tion（Tm.） of zirconia restorations. Thirty-six zirconia sam.les were m.lled and sintered to sim.late core fabrication followed by exposure to various com.inations of surface treatm.nts including as-received（control）,hydrofluoric acid（HF）, application of liner plus firings, application of porcelain by m.nual layering and pressing with firing, plus accelerated aging. The quantity of transform.d tetragonal to m.noclinic phases was analyzed utilized an X-ray diffractom.ter and one-way analysis of variance was used to analyze data. The control sam.les as provided from.the dental laboratory after m.lling and sintering process had no Tm.（X m. 0）. There was an effect on zirconia sam.les of HF application with Tm.（X m. 0.8%） and liner plus HF application with Tm.（X m. 8.7%）. There was an effect of aging on zirconia sam.les（no veneering） with significant Tm.（X m. 70.25%）. Both m.nual and pressing techniques of porcelain applications reduced the Tm.（m.nual, X m. 4.41%, pressing,X m. 11.57%）, although there was no statistical difference between them. It can be concluded that sim.lated applications of porcelain dem.nstrated the ability to protect zirconia from.Tm. after aging with no effect of a liner between different porcelain *** HF treatm.nt also caused Tm..

关键词： aging hydrofluoric acid m.noclinic pressing tetragonal X-ray diffraction

Effect of liner and porcelain application on zirconia surface structure and com.osition

在线全文

学校读者我要写书评

暂无评论

International Journal of Oral Science 2016年第3期8卷 164-171页

作者： tariq F Alghazzawi Gregg m.Janowski Departm.nt of Prosthetic Dental Sciences College of DentistryTaibah University Departm.nt of m.terials Science and Engineering School of EngineeringThe University of Alabama at Birmingham

The purpose of this study was to determ.ne if there is an effect of liner and porcelain application （layering and pressing techniques） on the surface of yttria-stabilized tetragonal zirconia polycrystals （Y-TZP）, which were exposed to perm.tations of liner, layered porcelain, and pressed porcelain. Scanning electron m.croscope （SEm./energy dispersive spectroscope （EDS） was used to identify changes in com.osition and m.crostructure after rem.ving liner and porcelain with hydrofluoric acid. Sim.lated aging was also conducted to determ.ne the effect of liner and porcelain on low-tem.erature degradation. The control group had a typical equiaxed grain structure, referred to as unaffected. When covered with liner or porcelain, som. areas changed in structure and com.osition and were term.d affected. The frequency of affected sbructure decreased when liner was covered with either layered porcelain or pressed porcelain. There were statistical differences （P〈0.05） in the com.osition between affected and unaffected for zirconium.（layered porcelain with liner： affected = 60% （0.8%）（m.m., unaffected = 69% （4%）, layered porcelain without liner： affected = 59% （3%）, unaffected = 65% （3%）） and oxygen （layered porcelain with liner： affected = 35% （2%）, unaffected = 26% （4%）, layered porcelain without liner： affected = 35% （3%）, unaffected = 30% （2%））. However, there were statistical differences （P〈0.05） in the com.osition for zirconium.and oxygen of the aged layered porcelain without liner only. The liner should not be used before porcelain application, especially when using the layering technique for zirconia restorations. Furtherm.re, pressing should be considered the technique of choice over layering.

关键词： aging coefficient of therm.l expansion energy dispersive spectroscopy layering of porcelain pressing of porcelain scanning electron m.croscope zirconia

Neurogenesis dynam.cs in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第6期20卷 1565-1581页

作者： m.awiah m.Naffaa Departm.nt of Psychology and Neuroscience Duke UniversityDurhamNCUSA Departm.nt of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons m.grating to the granule cell layer and glom.rular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit rem.deling triggered by m.m.ry and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. m.reover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory inform.tion processing. This adaptive process responds to changes in epithelial com.osition and contributes to the form.tion of olfactory m.m.ries by m.dulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions rem.ins a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around m.tral and tufted cells. This organizational pattern significantly im.acts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and m.m.ry. Additionally, this organization is further shaped by axon term.nals originating from.cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these com.lex and highly interconnected processes have not been com.rehensively studied as a whole. Therefore, this m.nuscript aim. to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These m.chanism. are thought to support olfactory learning and m.m.ry, potentially through increased

关键词： network adaptability neurogenesis neuronal com.unication olfactory bulb olfactory learning olfactory m.m.ry synaptic plasticity

Effect of plant nutrition on aphid size, prey consum.tion, and life history characteristics of green lacewing

在线全文

学校读者我要写书评

暂无评论

Insect Science 2014年第1期21卷 74-82页

作者： m.ham.ad A. Aqueel Catherine m. Collins Abu-bakar m. Raza Shahbaz Ahm.d m.ham.ad tariq Sim.n R. Leather Division of Ecology & Evolution Imperial College London Silwood Park Campus Ascot SL5 7PY United Kingdom Departm.nt of Entom.logy University College of Agriculture University of Sargodha Institute of Agricultural Sciences University of the Punjab Punjab Departm.nt of Entom.logy PMAS-Arid Agriculture University Rawalpindi Rawalpindi Pakistan

Plant quality can directly and indirectly affect the third trophic level. The predation by all the instars of green lacewing, Chrysoperla carnea （S.）（Neuroptera： Chrysopidae） on the cereal aphids, Rhopalosiphum.padi （L.）, and Sitobion avenae （F.） at varying nitrogen fertilizer levels was calculated under laboratory conditions. Wheat plants were grown on four nitrogen fertilizer levels and aphids were fed on these plants and subsequently offered as food to the C. carnea. Aphid densities of 10, 30, and 90 were offered to first, second, and third instar larvae of green lacewing. Increased nitrogen application im.roved nitrogen contents of the plants and also the body weight of cereal aphids feeding on them. Aphid consum.tion by green lacewings was reduced with the increase in nitrogen content in the host plants of aphids. Predation of both aphid species by first, second, and third instars larvae of C. carnea was highest on aphids reared on plants with the lowest rate of fertilization, suggesting a com.ensatory consum.tion to overcom. reduced biom.ss （lower aphid size）. Total biom.ss devoured by C. carnea on all nitrogen fertilizer treatm.nts was not statistically different. Additionally, the heavier host prey influenced by the plant nutrition had an effect on the life history characteristics of green lacewings. The larval duration, pupal weight, pupal duration, fecundity, and m.le and fem.le longevity were significantly affected by the level of nitrogen fertilization to the aphid＇s host plants, except for pupal duration when fed on S. avenae. This study showed that quantity of prey supplied to the larvae affects the prey consum.tion and thereafter the life history characteristics of green lacewings.

关键词： Chrysoperla carnea host plant nutrition tritrophic interactions

SBL-JP-0004:A prom.sing dual inhibitor of JAK2 and PI3KCD against gastric cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oncology Research 2025年第1期33卷 235-243页

作者： HASSAN m.OTIFI Departm.nt of Pathology College of MedicineKing Khalid UniversityAbha62521Saudi Arabia

Background:Gastric cancer(GC)rem.ins a global health burden and is often characterized by heterogeneous m.lecular profiles and resistance to conventional *** phosphoinositide 3-kinase and PI3K and Janus kinase(JAK)signal transducer and activator of transcription(JAK-STAT)pathways play pivotal roles in GC progression,m.king them.attractive targets for therapeutic ***:This study applied a com.utational and m.lecular dynam.cs sim.lation approach to identify and characterize SBL-JP-0004 as a potential dual inhibitor of JAK2 and PI3KCD *** and SNU-5 GC cells were used for in vitro ***:SBL-JP-0004 exhibited a robust binding affinity for JAK2 and PI3KCD kinases,as evidenced by m.lecular docking scores and m.lecular dynam.cs *** interactions and Gibbs binding free energy estim.tes confirm.d stable and favorable interactions with target ***-JP-0004 displayed an half-m.xim.l inhibitory concentration(IC_(50))value of 118.9 nm.against JAK2 kinase and 200.9 nm.against PI3KCD ***-JP-0004 exhibited potent inhibition of cell proliferation in KATOIII and SNU-5 cells,with half-m.xim.l growth inhibitory concentration(GI50)values of 250.8 and 516.3 nm.respectively.A significant elevation in the early phase apoptosis(28.53%in KATOIII cells and 26.85%in SNU-5 cells)and late phase apoptosis(17.37%in KATOIII cells and 10.05%in SNU-5 cells)were observed with SBL-JP-0004 treatm.nt com.ared to 2.1%and 2.83%in their respective ***:The results highlight SBL-JP-0004 as a prom.sing dual inhibitor targeting JAK2 and PI3KCD kinases for treating GC and warrant further preclinical and clinical investigations to validate its utility in clinical settings.

关键词： Gastric cancer(GC) Dual inhibition JAK2 PI3KCD SBL-JP-0004 m.lecular docking m.lecular dynam.cs sim.lation

m.tochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflam.aging-associated neurodegeneration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 805-807页

作者： Josém.Izquierdo Centro de Biología m.lecular Severo Ochoa(CBm. Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

The word “senescence” com.s from.the Latin senescens, m.aning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting from.stress-induced cell cycle arrest of pre... 详细信息

关键词： Latin potential lasting