检索结果-南通市图书馆

演绎别人的故事,关照自己的生活柳州高中ao话剧社

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

课堂内外（高中版）（A版） 2019年第10期 60-71页

作者： wheat 柳州高中ao话剧社

学校的生活总是分外单调,起床、上课、吃饭、睡觉,好像除了这些"例行公事"再也没有什么其他新鲜的盼头。象牙塔外的世界是怎样的?那些看似普通的路人究竟有着怎样不普通的人生?在柳州高中,有这样一群学生,他们与所有忙碌于学业的高中生... 详细信息

学校的生活总是分外单调,起床、上课、吃饭、睡觉,好像除了这些"例行公事"再也没有什么其他新鲜的盼头。象牙塔外的世界是怎样的?那些看似普通的路人究竟有着怎样不普通的人生?在柳州高中,有这样一群学生,他们与所有忙碌于学业的高中生一样,过着单调又充实的生活。可是,他们又有着些许不同。因为,在课余时间,他们还演绎着千万种人生。

关键词：高中生生活演绎柳州故事话剧课余时间象牙塔

在线全文

学校读者我要写书评

暂无评论

从ao传统加压接骨板到新型内固定器原则

中华创伤骨科杂志 2003年第3期5卷 212-217页

作者： Thomas P.Rüedi(托马斯.鲁迪) Christoph Sommer(克利斯托夫.邵墨) 罗炯顾立强 ao国际部瑞士库尔医院外科创伤部 ao中国校友会第一军医大学南方医院全军创伤骨科中心

骨折内固定中生物学的重要性和保护骨和软组织,作为ao的第4项原则已受重视。ao传统加压接骨板对骨面的压迫会干扰骨皮质的血运,引起接骨板下方骨的结构性改变。有限接触动力加压接骨板(LC-DCP)可减小接骨板和骨的接触面积。锁定螺丝钉(L... 详细信息

骨折内固定中生物学的重要性和保护骨和软组织,作为ao的第4项原则已受重视。ao传统加压接骨板对骨面的压迫会干扰骨皮质的血运,引起接骨板下方骨的结构性改变。有限接触动力加压接骨板(LC-DCP)可减小接骨板和骨的接触面积。锁定螺丝钉(LHS)、点接触固定器(PCFix)及微创固定系统(LISS)设计则因接骨板与骨面无接触和压迫,是新的一次变革。这种内固定器原理的概念可以用外固定支架来理解,可以防止任何对骨血运的破坏,其稳定性依赖于螺丝钉-接骨板组合的成角稳定性。带有锁定螺丝钉的新型微创固定系统(LISS)和锁定加压接骨板(LCP)可以为现代骨折手术治疗提供新的选择方法,是微创经皮接骨板技术(MIPO)的理想材料,并可以在疏松骨质内得到相当好的固定强度。然而,必须指出这些新型接骨板和螺丝钉并不能解决所有的问题,特别是在处理干骺端和骨干部骨折时,它们每一步的操作都需要有非常仔细的计划,包括重温ao经典的原则。

关键词： ao原则加压接骨板内固定器微创经皮接骨板技术 MIPO 微创固定系统 LISS 锁定加压接骨板 LCP

Bifurcation-based fractional-order PI~λD~μ controller design approach for nonlinear chaotic systems

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2018年第2期19卷 180-191页

作者： Karima RABAH Samir LADACI Mohamed LASHAB Signal Processing Laboratory Department of Electronics University of Mentouri Electrical Engineering Department University of 20 Aoùt 1955-Skikda Department of Electronics Electrotechnics and AutomaticsNational Polytechnic School of Constantine Electrical Engineering Department University of 20 Aoùt 1955-Skikda

We propose a novel approach called the robust fractional-order proportional-integral-derivative（FOPID）controller, to stabilize a perturbed nonlinear chaotic system on one of its unstable fixed points. The stability analysis of the nonlinear chaotic system is made based on the proportional-integral-derivative actions using the bifurcation diagram. We extract an initial set of controller parameters, which are subsequently optimized using a quadratic criterion. The integral and derivative fractional orders are also identified by this quadratic criterion. By applying numerical simulations on two nonlinear systems, namely the multi-scroll Chen system and the Genesio-Tesi system,we show that the fractional PI~λD~μ controller provides the best closed-loop system performance in stabilizing the unstable fixed points, even in the presence of random perturbation.

关键词： Fractional order system Bifurcation diagram Fractional PIλDμ controller Multi-scroll Chen chaoticsystem Genesio-Tesi chaotic system

Catalytic combustion of soot over ceria-zinc mixed oxides catalysts supported onto cordierite

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2014年第3期26卷 694-701页

作者： Leandro Fontanetti Nascimento Renata Figueredo Martins Rodrigo Ferreira Silva Osvaldo Antonio Serra Department of Chemistry FFCLRP University of Sao Paulo

Modified substrates as outer heterogeneous catalysts was employed to reduce the soot generated from incomplete combustion of diesel or diesel/biodiesel blends, a process that harms the environment and public health. The unique storage properties of ceria （CeO2） makes it one of the most efficient catalysts available to date. Here, we proposed that ceria-based catalysts can lower the temperature at which soot combustion occurs; more specifically, from 610℃ to values included in the diesel exhausts operation range （300-450℃）. The sol-gel method was used to synthesize mixed oxide-based catalysts （CeO2：ZnO）; the resulting catalysts were deposited onto cordierite substrates. In addition, the morphological and structural properties of the material were evaluated by XRD, BET, TPR-H2, and SEM. Thermogravimetric （TG/DTA） analysis revealed that the presence of the catalyst decreased the soot combustion temperature by 200℃ on average, indicating that the oxygen species arise at low temperatures in this situation, promoting highly reactive oxidation reactions. Comparative analysis of soot emission by diffuse reflectance spectroscopy （DRS） showed that catalyst-impregnated cordierite samples efficiently oxidized soot in a diesel/biodiesel stationary motor： soot emission decreased by more than 70%.

关键词： soot oxidation mixed oxides ceria

Impacts of channel dredging on hydrodynamics and sediment dynamics in the main channels of the Jiaojiang River Estuary in China

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2023年第9期42卷 132-144页

作者： Yanming Yao Xueqian Chen Jinxiong Yuan Li Li Weibing Guan Ocean College Zhejiang UniversityZhoushan 316021China Hangzhou Xi’ao Environmental Science and Technology Company Limited Hangzhou310011China State Key Laboratory of Satellite Ocean Environmental Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310058China

Channel dredging in estuaries increases water depth and subsequently impacts sediment dynamics and morphology. The Jiaojiang River Estuary is dredged frequently owing to heavy shipping demands. In this study,the effects of different dredging schemes on siltation were assessed through numerical modeling. The sediment model of the Jiaojiang River Estuary utilized an optimized bottom boundary layer model that considered the bed sediment grain size and fluid mud, and this model was calibrated using field data. Result reveal that channel dredging modifies the flow velocity inside and around the channel by changing the bathymetry;subsequently, this affects the residual current, bed stress, suspended sediment concentration, and sediment fluxes. Increasing the dredging depth and width increases the net sediment fluxes into the channel and dredging depth has a greater influence on the channel siltation thickness. When the dredging depth is 8.4 m or11.4 m, the average siltation thickness of the channel is 0.07 m or 0.15 m per mouth respectively. The parallel movement of the channel has small effects on the siltation volume during the simulation period. The sediment deposits in the channel primarily originates from the tidal flats, through bottom sediment fluxes. Vertical net circulation has a dominant impact on siltation because the difference of horizontal current of each layer on the longitudinal section of the channel increases, which intensifies the lateral sediment transport between the shoal and channel. The influence of vertical frictional dissipation on the lateral circulation at the feature points accounts for more than 50% before dredging, while the non-linear advective term is dominant after dredging. Tidal pumping mainly affects the longitudinal sediment fluxes in the channel. These results can be used for channel management and planning for similar estuaries worldwide.

关键词： sediment dynamics channel dredging bottom boundary layer siltation Jiaojiang River Estuary

Characterization of goat whey proteins and their bioactivity and toxicity assay

在线全文

学校读者我要写书评

暂无评论

Food Bioscience 2022年第2期46卷 833-843页

作者： Maria Isabel Ferreira Campos Paula Perazzo de Souza Barbosa Laura Junqueira Camargo Luciano Da Silva Pinto Bianca Mataribu Catarina Serr˜ao Luis Fernando Marques-Santos Jos´e Hon´orio Lopes Julia Mariano Caju de Oliveira Carlos Alberto de Almeida Gadelha Tatiane Santi-Gadelha Programa de P´os-Graduaç˜ao em Ciˆencia e Tecnologia de Alimentos Universidade Federal da ParaíbaJo˜ao PessoaParaíbaBrazil Departamento de Biologia Molecular Universidade Federal da ParaíbaJo˜ao PessoaParaíbaBrazil Centro de Desenvolvimento Tecnol´ogico Universidade Federal de PelotasRio Grande do SulBrazil Programa de P´os-Graduaç˜ao em Ciˆencias da Nutriç˜ao Universidade Federal da ParaíbaJo˜ao PessoaParaíbaBrazil

Goat whey is an industry-discarded dairy by-product that has interesting nutritional value and a nutrient composition with important functional potential,where proteins have a high biological value and play an important role in the organism’s ***,the aim of this study was to identify,quantify,concentrate and investigate the capacity of goat whey proteins to perform different biological activities and to evaluate their acute *** proteins were quantified and identified by Bradford,Kjehdal and SDS-PAGE *** activity was performed against Listeria monocytogenes,Salmonella spp.,Staphylococcus aureus,Pseudomonas aeruginosa and Escherichia coli microorganisms and showed MIC ranging from 15 to 120μg mL-1,with the highest inhibition for *** *** activity was performed against human malignant melanoma cells and their proliferation inhibition was up to 66.8%within 72 h of *** highest antioxidant capacity was obtained at concentration 2 mg that showed 29.69%of inhibition of DPPH radical *** acute toxicity test was performed using Artemia franciscana larvae in which whey proteins were able to preserve larval survival throughout ***,we can conclude that goat’s whey has proteins that can play a positive effect on health,with antimicrobial activity and without *** present study highlights the great potential of goat’s whey to be developed as a safe biopreservative or as a functional ingredient in the food industry.

关键词： Goat whey proteins Malignant cells Antimicrobial Antioxidant capacity Whey protein functionality

Petrogenesis of Granites from the Ediacaran Socorro Batholith,SE Brazil:Constraints from Zircon Dating,Geochemistry and Sr-Nd-Hf Isotopes

维普期刊数据库评论

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 Earth Science 2021年第6期32卷 1397-1414页

作者： Bárbara Bueno Toledo Valdecir de Assis Janasi Instituto de Geociências USPCEP 05508-900S∼ao PauloSPBrazil

Whole rock elemental and Sr-Nd isotope geochemistry and in situ zircon Hf isotope geochemistry were used to identify the sources of the Neoproterozoic granites from the Socorro batholith,Socorro-GuaxupéNappe(SGN),South Brasilia Orogen,*** trace elements and Hf isotope geochemistry provided information about sources and crystallization(T,f_(O2))*** main types of granites built the bulk of the batholiths,beginning with probably pre-collisional~640–630 Ma charnockites,and ending with~610 Ma voluminous post-collisional high-K calc-alkaline(HKCA)Ⅰ-type granites(Bragan?a Paulista-type).Several types of leucogranites were generated from 625 to 610 Ma,spanning the interval from collisional to post-collisional *** charnockite bodies occur in the study area:the~640 Ma Socorro charnockite has remarkable chemical similarities with Braganca Paulista-type granites,but higherε_(Nd)(t)=-6.1 and average zirconε_(Hf)(t)=-9.1 and lower^(86)Sr/^(87)Sr_(t)(0.7093)values,indicative of more juvenile and water-poor ***~633 Ma Atibaia charnockite has distinct geochemical signature(lower Mg^(#)and Sr content;higher Zr),more negativeε_(Nd)(t)=-14.1,similar average zirconε_(Hf)(t)=-8.9,and much higher^(86)Sr/^(87)Sr_(t)=0.7197,probably reflecting a larger component from old *** predominant~610 Ma Bragan?a Paulista-type granites were emplaced in a post-collisional setting,and correspond to porphyritic biotite-hornblende monzogranites of high-K calc-alkaline character with 61 wt.%–67 wt.%SiO_(2),high Mg^(#)(39–42),Sr/Y(19–40),La/Yb(12–69),highly negativeε_(Nd)(t)(-12.3 to-12.9)and zirconε_(Hf)(t)(-12 to-17)and^(87)Sr/^(86)Sr_(t)=0.7119–*** features are interpreted as indicative of magma generation in a thickened crust,where melts from enriched mantle sources emplaced in the lowermost crust,heated host old continental crust rocks(gneisses and granulites)and partially mixed with their melting *** plutons(SiO_(2)>72 wt.%)occur

关键词： U-Pb dating Socorro-GuaxupéNappe high-K calc-alkaline granites

Morphometric variability of Arctodiaptomus salinus （Copepoda） in the Mediterranean-Black Sea region

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2015年第6期36卷 328-336页

作者： Elena V.ANUFRIIEVA Nickolai V.SHADRIN The ao Kovalevsky Institute of Marine Biological Research Russian Academy of Sciences

Inter-species variability in morphological traits creates a need to know the range of variability of characteristics in the species for taxonomic and ecological tasks. Copepoda Arctodiaptomus salinus, which inhabits water bodies across Eurasia and North Africa, plays a dominant role in plankton of different water bodies-from fresh to hypersaline. This work assesses the intra- and inter-population morphometric variability of A. sa/inus in the Mediterranean-Black Sea region and discusses some observed regularities. The variability of linear body parameters and proportions was studied. The impacts of salinity, temperature, and population density on morphological characteristics and their variability can manifest themselves in different ways at the intra- and inter-population levels. A significant effect of salinity, pH and temperature on the body proportions was not found. Their intra-population variability is dependent on temperature and salinity. Sexual dimorphism of A. salinus manifests in different linear parameters, proportions, and their variability. There were no effects of temperature, pH and salinity on the female/male parameter ratio. There were significant differences in the body proportions of males and females in different populations. The influence of temperature, salinity, and population density can be attributed to 80%-90% of intra-population variability of A. salinus. However, these factors can explain less than 40% of inter-population differences. Significant differences in the body proportions of males and females from different populations may suggest that some local populations ofA. salinus in the Mediterranean-Black Sea region are in the initial stages of differentiation.

关键词： Crustacea Differentiation Morphology Sex differences Environmental factors

High efficiency gas-liquid separation system for pumped wells

在线全文

学校读者我要写书评

暂无评论

Petroleum 2019年第2期5卷 178-182页

作者： L.Enrique Ortiz-Vidal Marcel C.Barbosa Oscar M.H.Rodriguez Industrial Multiphase Flow Laboratory(LEMI) Mechanical Engineering DepartmentS~ao Carlos School of EngineeringUniversity of S~ao Paulo(USP)13563-120Sao CarlosSPBrazil

Gas-liquid separation is a very common process in industrial plants,where often high Efficiency of Gas Separation(EGS)is *** the upstream oil industry,gas separation is also crucial for the proper operation of Electrical Submergible Pumps(ESP).Recent studies report the excellent performance of a gravitational separator known as Inverted-Shroud separator(IS-separator).Laboratory results indicate that this kind of separator can achieve total gas separation for a wide range of operation conditions under continuous two-phase *** original intent is to use the IS-separator for downhole gas separation in oil production ***,by account of its simple design and relatively compact size,it may be suitable for using in industrial *** this paper,we present the IS-separator in details,including geometry characteristics and *** equipment performance is also *** addition,the challenges related to the deep understanding of the gas separation process inside the IS-separator and the possible practical solutions are outlined.

关键词： separation pumped details