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h-Said-Ball基与h-Said-Ball曲线
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作者 刘婉柔 解滨 韩力文 《高校应用数学学报(A辑)》 北大核心 2024年第3期273-290,共18页
h-Bezier曲线是Bezier曲线基于h-微积分意义下的推广模型.为增强Said-Ball曲线的造型能力,提高h-Bezier曲线递归求值速度,该文提出任意次的h-Said-Ball基函数,构造了h-Said-Ball曲线.通过分析Said-Ball曲线递归求值算法与Bezier曲线的... h-Bezier曲线是Bezier曲线基于h-微积分意义下的推广模型.为增强Said-Ball曲线的造型能力,提高h-Bezier曲线递归求值速度,该文提出任意次的h-Said-Ball基函数,构造了h-Said-Ball曲线.通过分析Said-Ball曲线递归求值算法与Bezier曲线的转化关系,结合h-Bezier曲线的递归求值算法和h-Bernstein基函数的构造方式,得到任意次h-Said-Ball基函数的表达式.h-Said-Ball基具有非负,单位分解,端点插值等优良性质,和h-Bernstein基之间存在显式转换矩阵.进一步,定义h-Said-Ball曲线并分析其基本性质,推导递归求值算法和包络表示,h-Said-Ball曲线的求值计算量是h-Bezier曲线的一半.借助从h-Said-Ball曲线到h-Bezier曲线的割角算法,证明了h-Said-Ball基是全正基,从而h-Said-Ball曲线具有变差缩减性和保凸性.数值实例显示了h-Said-Ball曲线相比Said-Ball曲线的造型优势和灵活性. 展开更多
关键词 h-Bezier曲线 said-BALL曲线 h-said-Ball基函数 h-said-Ball曲线 全正基 递归求值算法
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Egypt Shows World How to Tackle Hepatitis C
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作者 Alla Katsnelson 《Engineering》 SCIE EI CAS CSCD 2024年第7期2-4,共3页
In October 2023,Egypt received recognition for a feat that cheered public health experts around the world:It became the first country awarded the World Health Organization(WHO)“Gold Tier”certification for its progre... In October 2023,Egypt received recognition for a feat that cheered public health experts around the world:It became the first country awarded the World Health Organization(WHO)“Gold Tier”certification for its progress in eliminating viral hepatitis caused by the hepatitis C virus(HCV)[1].It is also the first time in history that a country has nearly eliminated a chronic illness caused by a virus.While that achievement itself is remarkable,especially impressive is the speed with which Egypt accomplished this public health triumph.In just 14 years,from 2008 to 2022,Egypt’s prevalence of HCV viral hepatitis fell from 10%to 0.38%[1],and deaths due to the disease dropped by 51%[2].Modeling suggests the country’s aggressive elimination program,which has tested more than 60 million people and treated more than 4 million[1],will have prevented almost 250000 HCV-related deaths by 2030[3]. 展开更多
关键词 egypt eliminating eliminated
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Geochemistry of island arc assemblage in the Eastern Desert of Egypt and the role of Pan-African magmatism in crustal growth of the Arabian–Nubian Shield:A review
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作者 Abdel-Aal MAbdel-Karim Mohamed MHamdy Adel A.Surour 《Acta Geochimica》 EI CAS CSCD 2024年第3期588-622,共35页
Neoproterozoic island arc assemblage of the Arabian–Nubian Shield(ANS)in the Eastern Desert(ED)of Egypt comprises juvenile suites of metavolcanics(MV),large amounts of meta-sedimentary rocks(MS),and voluminous metaga... Neoproterozoic island arc assemblage of the Arabian–Nubian Shield(ANS)in the Eastern Desert(ED)of Egypt comprises juvenile suites of metavolcanics(MV),large amounts of meta-sedimentary rocks(MS),and voluminous metagabbros-diorites(MGD)and syn-tectonic intrusions of older granitoids(OG).We report here the updates of these four rock units in terms of classification,distribution,chemical characteristics,geodynamic evolution,metamorphism,and ages.In addition,we discuss these integrated data to elucidate a reasonable and reliable model for crustal evolution in the ANS.The main features of these rock units indicate their relation to each other and the geodynamic environment dominated by early immature oceanic island arcs to primitive continental arcs.Integrated information of the island arc metavolcanic and plutonic rocks(gabbros,diorites,tonalites,and granodiorites)furnish evidence of the genetic relationships.These include proximity and a coeval nature in the field;all protolith magmas are subalkaline in nature following calc-alkaline series with minor tholeiitic affinities;common geochemical signature of the arc rocks and subduction-related magmatism;their similar enrichment in LREEs;and similar major element compositions with mafic melts derived from metasomatized mantle wedge.The volcano-sedimentary and the OG rocks underwent multiphase deformation events whereas the MGD complexes deformed slightly.Based on the magmatic,sedimentological,and metamorphic evolutions constrained by geochronological data as well as the progressive evolutionary trend from extensional to compressional regimes,a possible gradual decrease in the subducted slab dip angle is the most infl uential in any geodynamic model for arc assemblage in the ED of Egypt. 展开更多
关键词 Island arc assemblage MAGMATISM Crustal growth NEOPROTEROZOIC Arabian–Nubian Shield Eastern Desert egypt
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Mapping Structurally Controlled Alterations Sparked by Hydrothermal Activity in the Fatira–Abu Zawal Area,Eastern Desert,Egypt
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作者 Mohamed BADAWI Mahmoud ABDELATIF +3 位作者 Ali SHEBL Farid MAKROUM Ahmed SHALABY Norbert NéMETH 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2023年第2期662-680,共19页
The Eastern Desert of Egypt suffered a protracted period of deformation triggered by cratonization of the new juvenile crust known as the Arabian Nubian Shield(ANS),which has been proposed for potential gold discoveri... The Eastern Desert of Egypt suffered a protracted period of deformation triggered by cratonization of the new juvenile crust known as the Arabian Nubian Shield(ANS),which has been proposed for potential gold discoveries associated with the corresponding tectonic event.The Fatira area,on the border of Egypt’s Northern and Central Eastern Deserts,is covered with metavolcanic rocks twisted by a dextral relocation of the Fatira Shear Zone(FSZ)relative to the Barud magmatic body.The recent study evaluated many deformed post-orogenic granitic intrusions and felsite dikes associated with promising mineralization localities,notably orogenic gold deposits.The combination of various field observations and remote sensing data,followed by the analysis of aeromagnetic enhanced maps,allowed the differentiation of distinct lithologies,structural features,and hydrothermal alterations in the study area.Additionally,the integrated results obtained from the different interpretation techniques are utilized to identify and confirm the previously supposed mineralized localities in the Fatira and Abu Zawal areas and predict other matched localities.The final ASTER,Sentinel 2 hydrothermal alteration,and orientation entropy heat maps demonstrate the association between these mineralized regions and major structures related to the FSZ late stage of deformation rather than other structures studied throughout the area of interest. 展开更多
关键词 GOLD GRANITE island arc association Pan-African Orogeny egypt
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GIS-based flash flooding susceptibility analysis and water management in arid mountain ranges:Safaga Region,Red Sea Mountains,Egypt
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作者 Ahmed E.EL-RAYES Mohamed O.ARNOUS Ahmed M.HELMY 《Journal of Mountain Science》 SCIE CSCD 2023年第12期3665-3686,共22页
The Safaga Region(SR)is part of the Red Sea mountain range in Egypt.Catastrophic flash flooding is now an inescapable event,wreaking havoc and causing massive loss of life and property.The majority of the floodwater,h... The Safaga Region(SR)is part of the Red Sea mountain range in Egypt.Catastrophic flash flooding is now an inescapable event,wreaking havoc and causing massive loss of life and property.The majority of the floodwater,however,has been wasted as runoff to the Red Sea,which,if used wisely,could meet a fraction of the water demands for a variety of applications in this area.The current work aims to use GIS techniques to integrate remote sensing data for evaluating,mitigating,and managing flash floods in SR.The data set comprised Tropical Rainfall Measuring Mission(TRMM)thematic rainfall data,1:50,000 scale topographical map sheets,geological maps,the ASTER Digital Elevation Model(ASTER GDEM),Landsat 7 Enhanced Thematic Mapper"(ETM7+),and Landsat 8 Operational Land Imager.The flash flood risk model of SR is developed using ArcGIS-10.3 geoprocessing tools integrating all the causal factors thematic maps.The final flood risk model for the SR suggests that 57%of the total basins in the SR are at high risk of flooding.Almost 38%of all basins are at moderate flood risk.The remaining 5%of basins are less prone to flooding.Flood-prone zones were identified,suitable dam-building sites were located,and extremely probable areas for water recharge were recognized.On the basis of reliable scientific data,structural and non-structural mitigation strategies that might reduce the damage susceptibility,alleviate the sensitivity of the flash flood,and best utilize its water supply were recommended. 展开更多
关键词 Flash floods GIS SUSCEPTIBILITY Water management Arid mountains egypt
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China-Egypt Tourism Cooperation Continuing to Forge Ahead
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作者 Yang Ronghao 《China & The World Cultural Exchange》 2023年第3期16-18,共3页
With the joint efforts of the two sides,the tourism cooperation between the two countries will achieve greater development,the tourist requirements accumulated in the past three years will be fully released,and the nu... With the joint efforts of the two sides,the tourism cooperation between the two countries will achieve greater development,the tourist requirements accumulated in the past three years will be fully released,and the number of Chinese tourists and flights to Egypt will get recovery or even exceed the pre-pandemic level. 展开更多
关键词 egypt TOURIST TOURISM
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Urological and genital surgery in ancient Egypt
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作者 Patric Blomstedt 《History & Philosophy of Medicine》 2023年第1期16-23,共8页
Background:Ancient Egypt might be considered the cradle of medicine.The modern literature is somewhat too enthusiastic regarding the procedures given an Egyptian origin.The aim of the current paper is to briefly analy... Background:Ancient Egypt might be considered the cradle of medicine.The modern literature is somewhat too enthusiastic regarding the procedures given an Egyptian origin.The aim of the current paper is to briefly analyze the claims regarding urological and genital surgery in Egypt,in order to decide what the Egyptian actually do,and what has incorrectly been ascribed to them.Methods:The original sources as well as the modern literature was reviewed regarding surgery in ancient Egypt.Results:There is only one source indicating a urological procedure for medical indications in the Egyptian material.The Ebers papyrus can be interpreted as describing a surgical treatment for hydrocele.The sources are more abundant regarding male circumcision,while female circumcision is mainly documented from a later period.The suggestions that castration and lithotomy were performed are based on a lack of understanding of the sources.Conclusion:The ancient Egyptians did possibly treat hydrocele with a minor surgical procedure,but there are no indications in the sources that other urological procedures were performed.Circumcisions were common,but were not performed on a medical indication.These findings are in line with the general level of Egyptian surgery. 展开更多
关键词 egypt UROLOGY CIRCUMCISION CASTRATION HISTORY
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Methods and management in ancient Egyptian and Greek medicine
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作者 Ana María Rosso 《History & Philosophy of Medicine》 2023年第3期8-20,共13页
Objective:Demonstrate that some ancient Egyptian medical treatments are still used today while Greeks appropriated many concepts that have partially disappeared.Methods:Through the study of classical authors,Egyptian ... Objective:Demonstrate that some ancient Egyptian medical treatments are still used today while Greeks appropriated many concepts that have partially disappeared.Methods:Through the study of classical authors,Egyptian papyri,ancient medical sources and historical and recent research,this article examines some neglected aspects in the traditional picture of ancient Egyptian medicine,now considered the cradle of scientific inquiry.Results:A framework of important health conditions must be highlighted in Egypt:accurate diagnosis similar to the present,training of highly skilled specialists,a health care system,greatly advanced for its time,although including magical practices and spells,because all types of healers coexisted peacefully.Hippocratic medicine also adopted Egyptian incubation,the same scientific and rational systems in patient therapy and older Egyptian ideas and remedies.The brilliant Egyptian hypothesis about gastrointestinal residuals or wxdw,a methodical approach to interpreting internal diseases,opened the road to a coherent and scientific therapy.Based on the Egyptian idea of self-intoxication through dangerous materials and of pathogenic decay that survives in the modern use of the Greek word sepsis,different Greek medical schools have been influenced and are even well developed in modern times.When they realized that putrefaction began in the intestine,they applied mummification and embalming for corpses and employed emetics,purges and enemas in patients.Greeks,by contrast,to avoid contamination,adopted dead cremation and their false humoral theory remained until the 17th century AC,as well as the false benign pus.Conclusions:Egyptian physicians,still ignoring the concept of infection or inflammation,clearly recognized local purulence and identified the presence and growth of pathogenic agents in infections.Thus,they were pioneers in solving pyogenic lesion debridement and diagnose the feverish profile of a noxious laceration,starting the prevention and control of infection used today. 展开更多
关键词 ancient egypt and Greece pioneer physicians false theories
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所言真实和所评真实——以“说真的”和“真的”的差别为例
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作者 陈颖 《汉语学报》 北大核心 2024年第2期15-25,共11页
具有“叙实性”的语言成分作为一种预设触发语,其本质是说话人对话语真实性的主观鉴定:既可以通过某种行为进行鉴定,也可以通过言说或评判进行鉴定。“说真的”和“真的”虽然都是具有叙实性的话语标记,都具有主观性,但由于一方面二者... 具有“叙实性”的语言成分作为一种预设触发语,其本质是说话人对话语真实性的主观鉴定:既可以通过某种行为进行鉴定,也可以通过言说或评判进行鉴定。“说真的”和“真的”虽然都是具有叙实性的话语标记,都具有主观性,但由于一方面二者分别表现“主体的客观性”和“主体的主观性”,另一方面“说真的”具有内部和外部双重视角,“真的”只具有外部视角,这就使得它们对真实性的鉴定方式并不相同:“说真的”是“所言真实”,“真的”是“所评真实”。 展开更多
关键词 叙实性 主体表现 视角 所言真实 所评真实
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圣域重构——《法雍之书》与“消失的‘迷宫’”
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作者 颜海英 王怀轩 《杭州师范大学学报(社会科学版)》 2024年第1期34-48,共15页
对于古典作家而言,“东方”几乎是一个无可或缺的镜像,而埃及则在相当程度上既是整个东方想象的核心,亦是其重要的异例。在他们笔下,一座“消失的‘迷宫’”便颇为引人注目,甚至一度令古老的金字塔都相形见绌。伴随着19世纪旨在重寻克... 对于古典作家而言,“东方”几乎是一个无可或缺的镜像,而埃及则在相当程度上既是整个东方想象的核心,亦是其重要的异例。在他们笔下,一座“消失的‘迷宫’”便颇为引人注目,甚至一度令古老的金字塔都相形见绌。伴随着19世纪旨在重寻克诺索斯迷宫的克里特考古勃兴,对于这座埃及典范的探索热情亦高涨起来。然而,即使皮特里等埃及学家皆相继宣称在哈瓦拉发现了这座“迷宫”,但可资确证的古埃及文献寥寥无几,在被视为古代埃及“地图”的《法雍之书》中,更似乎是全然不见这一庞大建筑群之踪影。但事实上,“迷宫”恰恰就是物质化了的《法雍之书》,而《法雍之书》也即是文本化乃至“正典化”了的“迷宫”,共同体现出中王国末期古埃及人围绕法雍地区所构建的神圣景观与世界想象,是同一理念的不同载体。由此,神圣王权、法雍地区的索贝克崇拜与整个埃及世界遂得以融为一体,重新创造出一个崭新的、法雍化了的“世界”。在这个世界中,索贝克是统御一切信仰的信仰,不仅在世俗和现实的意义上整合着埃及各处,而且还通过法雍这一载体,将关乎世界的想象首次具象化、实体化、正典化,从而深入到每一个人的内心之中。 展开更多
关键词 古代埃及 中王国 《法雍之书》 哈瓦拉“迷宫” 神圣地理
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奥西里斯的远征:跨文化神话与托勒密埃及的认同政治
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作者 徐晓旭 《武汉大学学报(哲学社会科学版)》 北大核心 2024年第2期110-117,共8页
公元前1世纪的希腊历史学家西西里的狄奥多罗斯在《历史丛书》1.17-20中讲述了一个关于埃及国王奥西里斯远征全世界传播文明的神话。这则“文明交流互鉴”神话中的人物有埃及的,也有希腊的,故事发生地点涉及欧亚非三大洲多地。对该神话... 公元前1世纪的希腊历史学家西西里的狄奥多罗斯在《历史丛书》1.17-20中讲述了一个关于埃及国王奥西里斯远征全世界传播文明的神话。这则“文明交流互鉴”神话中的人物有埃及的,也有希腊的,故事发生地点涉及欧亚非三大洲多地。对该神话多角度的分析表明,它应该是托勒密一世时期希腊化埃及官方创造的,它构成了托勒密王朝认同政治的一项内容。 展开更多
关键词 奥西里斯 狄奥尼索斯 亚历山大 马其顿 托勒密埃及 跨文化传播 文明交流互鉴
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埃及开展高等教育质量保障的动因、经验及启示
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作者 秦琴 《现代教育论丛》 2024年第2期56-66,共11页
提高高等教育质量已成为一种国际共识。对于发展中国家而言,建设质量保障体系是实现教育可持续发展的重要基础。埃及正处在社会转型期,提供高质量的教育服务,满足雇主对人才培养的需求,提高毕业生的就业竞争力是埃及高等教育发展所面临... 提高高等教育质量已成为一种国际共识。对于发展中国家而言,建设质量保障体系是实现教育可持续发展的重要基础。埃及正处在社会转型期,提供高质量的教育服务,满足雇主对人才培养的需求,提高毕业生的就业竞争力是埃及高等教育发展所面临一项紧迫任务。近二十年来,埃及建立了从高校到专业乃至课程的多层面、综合性的高等教育质量保障体系,通过国际合作与国内项目共同推动高等教育质量的提升。该体系的优点在于相对严格的同行评议制和与国际相接轨的质量认证标准及评估认证程序,问题则在于质量认证体系中存在的结构性缺陷以及由阿兹哈尔高等教育机构所引发的系统性障碍。 展开更多
关键词 埃及 高等教育 质量保障 认证 启示
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论古尔纳《囚笼》中的“边界”概念
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作者 邱永旭 谢辰新 《昭通学院学报》 2024年第1期41-47,54,共8页
美国文学理论家萨义德从思想观念的角度出发,对“边界”概念做出了新的解释,他以后殖民主义文化霸权“地方权威——中央权威”的权力构成模型为基础,揭示出了“边界”在区分“自我”和“他者”问题上的身份认同功能;而英国籍坦桑尼亚裔... 美国文学理论家萨义德从思想观念的角度出发,对“边界”概念做出了新的解释,他以后殖民主义文化霸权“地方权威——中央权威”的权力构成模型为基础,揭示出了“边界”在区分“自我”和“他者”问题上的身份认同功能;而英国籍坦桑尼亚裔作家阿卜杜勒拉扎克·古尔纳及其创作的短篇小说《囚笼》,则紧紧围绕“身份认同”这一问题,通过深度刻画的小说人物,精心布置的故事场景,创造性地揭示出“边界”划分“内化”和“多样化”的新特征,进而实现了对殖民话语内部流动过程的一次新探索。 展开更多
关键词 古尔纳 萨义德 边界 《东方学》
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Said-Bézier曲线的等距曲线的有理逼近 被引量:5
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作者 江平 王珺 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2008年第11期1494-1499,共6页
等距曲线逼近的关键在于对其参数速度的逼近,给出了Said-Bézier曲线参数速度的Tchebyshev逼近和Tchebyshev-Padé逼近,在此基础上得到了Said-Bézier曲线的等距曲线的2种有理逼近函数.因为n次Said-Bézier曲线在参数K ... 等距曲线逼近的关键在于对其参数速度的逼近,给出了Said-Bézier曲线参数速度的Tchebyshev逼近和Tchebyshev-Padé逼近,在此基础上得到了Said-Bézier曲线的等距曲线的2种有理逼近函数.因为n次Said-Bézier曲线在参数K =[n/2]时,即为n次Bézier曲线,所以文中方法同样适用于Bézier曲线的等距曲线逼近.最后通过2个实例验证了这2种逼近方法,并与Legendre逼近方法进行了比较. 展开更多
关键词 said—Bezier曲线 等距曲线 参数速度 Tchebyshev逼近 Tchebyshev-Pade逼近
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四次Said-Ball曲线的扩展 被引量:6
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作者 王成伟 董庆华 《纺织高校基础科学学报》 CAS 2009年第2期245-249,共5页
给出了一个含有参数λ的五次多项式基函数,是四次Said-Ball曲线基础函数的扩展;分析了此基函数的性质,基于该组基函数定义了带有形状参数的多项式曲线.曲线不仅具有四次Said-Ball曲线的特性,而且具有形状的可调性和更好的逼近性.参数λ... 给出了一个含有参数λ的五次多项式基函数,是四次Said-Ball曲线基础函数的扩展;分析了此基函数的性质,基于该组基函数定义了带有形状参数的多项式曲线.曲线不仅具有四次Said-Ball曲线的特性,而且具有形状的可调性和更好的逼近性.参数λ有明确的几何意义:λ越大,曲线越逼近控制多边形;当λ=0时,曲线退化为四次Said-Ball曲线.还讨论了两段曲线C1连续拼接的条件.实例表明,定义的曲线的形状是随着λ取不同的值而发生变化. 展开更多
关键词 计算机应用 said—Ball曲线 形状参数 曲线设计
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基于广义逆的张量积Said-Ball曲面降多阶逼近 被引量:2
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作者 张莉 唐烁 陈国琪 《合肥工业大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第2期216-219,共4页
文章给出张量积 Said-Ball曲面降多阶逼近的一种方法 ,即将曲面的降多阶过程视为升阶的逆过程 ,利用广义逆矩阵的理论得到降阶曲面控制顶点的显式表示式 ,从而得到了用矩阵表示的降多阶张量积 Said-Ball曲面的控制顶点的显式表示式。在... 文章给出张量积 Said-Ball曲面降多阶逼近的一种方法 ,即将曲面的降多阶过程视为升阶的逆过程 ,利用广义逆矩阵的理论得到降阶曲面控制顶点的显式表示式 ,从而得到了用矩阵表示的降多阶张量积 Said-Ball曲面的控制顶点的显式表示式。在降多阶过程中 ,分别考虑了带角点高阶插值条件和不带角点插值条件的情形 。 展开更多
关键词 张量积said—Ball曲面 降多阶 角点插值
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区间Wang-Said型广义Ball曲线的降阶 被引量:3
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作者 檀结庆 方中海 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2008年第11期1483-1493,共11页
定义了区间Wang-Said型广义Ball曲线(WSGB曲线),它可作为误差控制和产品检验的有效工具;采用3种方法讨论了其降阶逼近问题,即扰动法、利用Chebyshev多项式导出的最佳一致逼近算法和插值端点的最佳一致逼近方法;给出了各种处理方法的显... 定义了区间Wang-Said型广义Ball曲线(WSGB曲线),它可作为误差控制和产品检验的有效工具;采用3种方法讨论了其降阶逼近问题,即扰动法、利用Chebyshev多项式导出的最佳一致逼近算法和插值端点的最佳一致逼近方法;给出了各种处理方法的显式误差表示.最后结合数值实例分析了3种方法的优劣. 展开更多
关键词 区间Wang—said型广义Ball曲线 降阶 扰动法 最佳一致逼近 端点插值
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Said-Bézier型广义Ball基的全正性 被引量:3
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作者 汪峻萍 余宏杰 邬弘毅 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2005年第6期1186-1190,共5页
参数曲线的保形性与生成它的基函数的规范化全正性有关.利用割角算法证明了一族SaidB啨zier型广义Ball基是规范化全正的,同时给出反例说明另一族WangSaid型广义Ball基不是规范化全正的.
关键词 said-Bézier型广义Ball基 规范化全正性 割角算法 保形性 Wang-said型广义Ball基
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爱资哈尔在当代埃及的政治参与及其特征和影响
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作者 马黛瑞 丁俊 《阿拉伯世界研究》 北大核心 2024年第1期61-82,158,159,共24页
爱资哈尔在历史上长期居于埃及国家政治生活中的重要位置,构建起伊斯兰最高权威和阿拉伯民族象征的双重身份。现代以来,爱资哈尔不断增强的国家认同决定了其以配合政治权威、服务国家利益为己任,日益趋向依附国家政权,经历了从支持阿拉... 爱资哈尔在历史上长期居于埃及国家政治生活中的重要位置,构建起伊斯兰最高权威和阿拉伯民族象征的双重身份。现代以来,爱资哈尔不断增强的国家认同决定了其以配合政治权威、服务国家利益为己任,日益趋向依附国家政权,经历了从支持阿拉伯社会主义到倾向政治伊斯兰主义,再到倡导伊斯兰中间主义的思想演变,逐渐形成了以爱资哈尔长老为核心的宗教学者参政主体,以伊斯兰教义原则为参政依据,以丰富的社会资源为参政基础,以维护国家统一、社会稳定和引领社会主流价值观为参政目的的独特政治参与方式。爱资哈尔积极参政辅政,致力于社会变革与文化建设,在协调政教关系、推动埃及社会发展、凝聚国家认同、促进社会公平、引领社会舆论、塑造社会主流价值、参与国家治理等诸多方面,发挥了独特且重要的作用,产生了广泛影响。 展开更多
关键词 爱资哈尔 埃及 政治参与 政教关系
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Said-Ball曲线的降多阶逼近 被引量:1
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作者 唐烁 张莉 《合肥工业大学学报(自然科学版)》 CAS CSCD 2004年第6期677-681,共5页
文章首先给出了Said-Ball曲线的一种降多阶逼近方法,它主要考察了原曲线与降阶曲线之间在最小二乘范数下的距离函数,通过距离函数取最小值,从而得到降阶曲线控制顶点的显式表示式。该方法还考虑了原曲线与降阶曲线在两端点处分别达到(r... 文章首先给出了Said-Ball曲线的一种降多阶逼近方法,它主要考察了原曲线与降阶曲线之间在最小二乘范数下的距离函数,通过距离函数取最小值,从而得到降阶曲线控制顶点的显式表示式。该方法还考虑了原曲线与降阶曲线在两端点处分别达到(r,s)阶连续的情形(r≥0,s≥0),给出了降阶误差界的估计及数值例子。 展开更多
关键词 said-BALL曲线 降多阶 升阶 控制顶点
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