检索结果-南通市图书馆

现代制造 2024年第5期 6-7页

作者：科尔摩根科尔摩根

科尔摩根发布的2G运动控制系统标志着性能与技术可靠性新高度，成为高性能设备首选。该系统深度融合AKM2G伺服电机与AKD2G驱动器的卓越性能，实现顶尖功率密度与运动控制，彰显紧凑设计、简易安装、高度灵活性，在转矩、响应速度、SafeM...

科尔摩根发布的2G运动控制系统标志着性能与技术可靠性新高度，成为高性能设备首选。该系统深度融合AKM2G伺服电机与AKD2G驱动器的卓越性能，实现顶尖功率密度与运动控制，彰显紧凑设计、简易安装、高度灵活性，在转矩、响应速度、SafeMotion功能上的显著提升。

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

什么是小说

教师博览（上旬刊） 2024年第7期 60-61页

作者： [英]爱德华·摩根·福斯特杨蔚(译) 不详

我们需要一个好的立足点,因为小说(novel)太复杂,太没有一定之规了——其中没有山峰可供征服,没有帕纳塞斯山(parnassus,位于希腊境内,是神话传说中文艺与科学诸女神缪斯的居所)、赫利孔山(Helicon,同样位于希腊境内,希腊神话中两个缪... 详细信息

我们需要一个好的立足点,因为小说(novel)太复杂,太没有一定之规了——其中没有山峰可供征服,没有帕纳塞斯山(parnassus,位于希腊境内,是神话传说中文艺与科学诸女神缪斯的居所)、赫利孔山(Helicon,同样位于希腊境内,希腊神话中两个缪斯“灵泉”的所在地,意味着灵感的源泉),甚至没有毗斯迦山。

关键词：赫利孔山神话传说希腊神话缪斯 icon

实验室培养肉进入顾客餐桌——机遇与挑战并存

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

Engineering 2024年第3期34卷 3-5页

作者： Sarah c.p.Williams Senior Technology Writer

In the summer of 2023,two US restaurants added a novel item to their menus:chicken grown in a lab(Fig.1)[1,2].The first to receive regulatory approval for commercial sale,the lab-grown—or"cultivated"—meat starts as a few real chicken cells that are grown in vats of liquid and nutrients until they become pieces large enough to shape into nuggets and strips.

关键词：实验室培养 approval restaurant

在线全文

学校读者我要写书评

暂无评论

抗肥胖症药物市场需求旺盛

Engineering 2024年第1期32卷 4-6页

作者： Sarah c.p.Williams Senior Technology Writer

In early September 2023,when its market cap jumped to 428 billion USD,a valuation topping the estimated 2022 gross domestic product of its Scandinavian home country,the drugmaker Novo Nordisk(Bagsværd,Denmark)briefly eclipsed the French luxury brand conglomerateLMVH(paris,France)as Europe's most valuable company[1].The reason for the company's soaring worth?Its already best-selling weight loss drug Wegovy was being released to patients in the United Kingdom.

关键词： market French briefly

在线全文

学校读者我要写书评

暂无评论

巴西油气勘探开发历程:从陆上到超深水

石油勘探与开发 2024年第4期51卷 796-806页

作者： ANJOS Sylvia M c SOMBrA cristiano L SpADINI Adali r 巴西国家石油公司里约热内卢20231-030巴西

21世纪以来,随着桑托斯盆地深水盐下获得一系列重大油气发现,巴西东部海域成为全球深水油气勘探与生产的热点区域。通过全面回顾巴西油气勘探开发历程,系统阐述了从陆上到海域、从浅水到深水—超深水直至盐下勘探的探索实践、战略转变... 详细信息

21世纪以来,随着桑托斯盆地深水盐下获得一系列重大油气发现,巴西东部海域成为全球深水油气勘探与生产的热点区域。通过全面回顾巴西油气勘探开发历程,系统阐述了从陆上到海域、从浅水到深水—超深水直至盐下勘探的探索实践、战略转变、重大突破和关键理论技术。巴西国家石油公司(简称巴西国油)自1953年成立以后的15年间,在陆上古生界克拉通盆地和断陷盆地进行了勘探,并于断块和三角洲砂体圈闭获得了一些中小型油气发现。20世纪70年代,应用重力流沉积模式和高质量三维地震等勘探新技术,在坎波斯盆地浅水中发现Namorado和Enchova等油田,随后深水盐上勘探获得突破,成功发现Marlim、roncador等大型油田。21世纪初,通过盐下含油气系统、碳酸盐岩成储成藏模式和核磁共振测井等理论技术攻关,推动桑托斯盆地下白垩统湖相碳酸盐岩陆续获得Tupi(Lula)、Buzios、Mero等世界级超深水盐下大油田的系列重大发现。在复杂的深水作业环境下,油气开发工程面临巨大挑战,巴西国油通过启动深水研发计划(prOcAp),开发并实施窄压力窗口控压钻井、加压钻井液帽钻井、多段智能完井、水下采油及浮式生产平台开发和流动保障等关键技术,显著提升了钻完井、油气田开发和输运的效率及安全性。此外,在浮式采储卸油系统建产规模受限的情况下,推进全球最大规模的cO_(2)捕集、驱油利用与埋存工程(ccUS-EOr),有效减少温室气体排放并提高了原油采收率。上述理论技术的发展和应用,也为全球深水油气勘探开发提供了宝贵经验。未来巴西油气勘探将继续聚焦深水盐下碳酸盐岩和盐上浊积岩,并在古生界天然气等勘探领域持续寻求新的发现,同时通过技术创新和战略合作,促进巴西石油天然气行业的可持续发展。

关键词：巴西深水盐下勘探坎波斯盆地桑托斯盆地浊积岩湖相碳酸盐岩深水开发流动保障

同方期刊数据库

增材制造Ti6Al4V合金的闪速等离子体电解氧化与在生理介质中的电化学行为

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of china 2024年第4期34卷 1150-1166页

作者： H.MOrA-SANcHEZ c.rAMOS M.MOHEDANO B.TOrrES r.ArrABAL E.MATYKINA Departamento de Ingeniería Química y de Materiales Facultad de Ciencias QuímicasUniversidad Complutense de Madrid28040 MadridSpain cIDETEc Basque Research and Technology Alliance(BRTA)Po.Miramón 19620014 Donostia-San SebastiánSpain Departamento Matemática Aplicada Ciencia e Ingeniería de Materiales y Tecnología ElectrónicaUniversidad Rey Juan CarlosC/Tulipán s/nMóstoles 28933MadridSpain

研究激光粉末床熔融增材制造(AM)(又称直接金属激光烧结)技术制备的Ti6Al4V合金等离子体电解氧化(pEO)处理及其电化学行为。通过短时间(<120 s)pEO处理(也称闪速pEO),在AM合金和传统合金表面制备了3~10μm厚、含ca和p的涂层。然后在改... 详细信息

研究激光粉末床熔融增材制造(AM)(又称直接金属激光烧结)技术制备的Ti6Al4V合金等离子体电解氧化(pEO)处理及其电化学行为。通过短时间(pEO处理(也称闪速pEO),在AM合金和传统合金表面制备了3~10μm厚、含ca和p的涂层。然后在改良的α-MEM溶液中,通过动电位极化曲线和电化学阻抗谱(EIS)评估了合金的电化学行为。与传统合金相比,AM合金中形成了细小的层片状α显微组织和层间小尺寸的β相颗粒,这促使了火花的产生,从而促进了pEO涂层的生长。闪速pEO涂层提高了传统合金和AM合金的耐腐蚀性,最薄的涂层(pEO处理也足以成功避免这种情况。

关键词：增材制造激光粉末床熔融等离子体电解氧化闪速pEO 钛缝隙腐蚀 α-MEM

同方期刊数据库

Efficient guiding and focusing of intense laser pulse using periodic thin slits

在线全文

学校读者我要写书评

暂无评论

Matter and radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu T.W.Huang K.Jiang c.N.Wu H.peng p.c.hen r.Li H.B.Zhuo c.T.Zhou Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-plasma interactions as plasma optical components for generating high-harmonic light and controlling laser-driven particle ***,we propose and demonstrate that periodic thin slits can be regarded as a new breed of optical elements for efficient focusing and guiding of intense laser *** fundamental physics of intense laser interaction with thin slits is studied,and it is revealed that relativistic effects can lead to enhanced laser focusing far beyond the pure diffractive focusing *** addition,the interaction of an intense laser pulse with periodic thin slits makes it feasible to achieve multifold enhancement in both laser intensity and energy transfer efficiency compared with conventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applications.

关键词： laser pulse intense

Severe acute respiratory syndrome-coronavirus-2(SArS-cOV-2)infection of pneumocytes with vaccination and drug therapy:Mathematical analysis and optimal control

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

International Journal of Biomathematics 2024年第2期17卷 299-334页

作者： r.Viriyapong p.Inkhao Department of Mathematics Faculty of Science Naresuan University Phitsanulok65000Thailand

We propose a mathematical model studying a within-host infection dynamics of SArScoV-2 in *** model incorporates immune response,vaccination and antiviral *** crucial properties of the model-the existence,positivity and boundary of solutions are *** points and the basic reproduction number are *** stability of each equilibrium point is *** control is applied to the model by adding three control variables:vaccination,treatment by Favipiravir and treatment by *** results show that each individual control could reduce SArS-coV-2 infection in some aspects;however,with a combination of three controls,we obtain the best results in reducing SArS-coV-2 *** study has emphasized the importance of prevention by vaccine and the antiviral treatments.

关键词： SArS-coV-2 vaccination drug therapy immune response optimal control

Drought events influence nutrient canopy exchanges and green leaf partitioning during senescence in a deciduous forest

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

Forest Ecosystems 2024年第1期11卷 110-119页

作者： J.Touche c.calvaruso p.De Donato M.-p.Turpault INrAE BEFF-54000NancyFrance UMr 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The increase in the frequency and intensity of drought events expected in the coming decades in Western Europe may disturb forest biogeochemical cycles and create nutrient deficiencies in *** possible origin of nutrient deficiency is the disturbance of the partitioning of the green leaf pool during the leaf senescence period between resorption,foliar leaching and senesced ***,the effects of drought events on this partitioning and the consequences for the maintenance of tree nutrition are poorly *** experiment in a beech forest in Meuse(France)was conducted to assess the effect of drought events on nutrient canopy exchanges and on the partitioning of the green leaf pool during the leaf senescence *** aim was to identify potential nutritional consequences of droughts for *** nutrient dynamics,including resorption,chemistry of green and senesced leaves,foliar absorption and leaching in mature beech stands from 2012 to 2019 allowed us to compare the nutrient exchanges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a decrease by almost a third of the potassium(K)partitioning to resorption(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity expected for the coming decades,there will be a risk of potassium deficiency in trees,as already observed in a rainfall exclusion experiment on the same study *** foliar leaching and higher parititioning to the senesced leaves for K and phosphorus(p)were also *** addition,a slight increase in nitrogen(N)resorption efficiency occurred during dry years which is more likely to improve tree *** calcium(ca)negative resorption decreased,with no apparent consequence in our study *** results show that nutrient exchanges in the canopy and the partitioning of the green leaf

关键词： Natural drought Beech forest canopy resorption Foliar leaching Senesced leaves Nutrition