云南高校图书馆联盟文献共享服务平台- SPIRALS

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Tool Path Planning with Confined Scallop Height Error Using Optimal Connected Fermat Spirals: 《Communications in Mathematics and Statistics》2024年第1期55-78,共24页Hong-Yu Ma Chun-Ming Yuan Li-Yong Shen; supported by Beijing Natural Science Foundation under Grant Z190004;National Key Research and Development Program of China under Grant 2020YFA0713703,NSFC(Nos.11688101,61872332)and Fundamental Research Funds for the Central Universities.; In CNC machining,the tool path planning of the cutter plays an important role.In this paper,we generate a space-filling and continuous tool path for free-form surface represented by the triangular mesh with a confined...; 关键词：Tool path planning Connected Fermat spirals Scallop height Kinematic constraints

Self-assembly of Fibonacci number spirals in amyloid-like nanofibril films: 《Science China Materials》2022年第11期3150-3156,共7页Yuefei Wang Dongzhao Hao Jiayu Liu Qing Li Zixuan Wang Xi Rong Wei Qi Rongxin Su Zhimin He; supported by the National Natural Science Foundation of China(21621004 and 22078239);Tianjin Development Program for Innovation and Entrepreneurship(2018);the State Key Laboratory of Chemical Engineering(SKL-Ch E-20Z04 and SKL-Ch E-21T03)。; Fibonacci number spiral patterns can be found in nature,particularly in plants,such as the sunflowers and phyllotaxis.Here,we demonstrated this pattern can be reproduced spontaneously within self-assembling peptide na...; 关键词：PEPTIDE chiral self-assembly Fibonacci number spirals handedness inversion

Ultralow-loss compact silicon photonic waveguide spirals and delay lines被引量：9: 《Photonics Research》2022年第1期1-7,共7页SHIHAN HONG LONG ZHANG YI WANG MING ZHANG YIWEI XIE DAOXIN DAI; National Major Research and Development Program (2018YFB2200200, 2018YFB2200201);National Science Fund for Distinguished Young Scholars (61725503);National Natural Science Foundation of China(61961146003, 91950205);Zhejiang Provincial Major Research and Development Program (2021C01199);Zhejiang Provincial Natural Science Foundation(LD19F050001, LZ18F050001);Fundamental Research Funds for the Central Universities。; Low-loss and compact optical waveguides are key for realizing various photonic integrated circuits with long onchip delay lines,such as tunable optical delay lines,optical coherence tomography,and optical gyroscopes.I...; 关键词：WAVEGUIDE TUNABLE DELAY

Geostrophic Spirals Generated by the Horizontal Diffusion of Vortex Stretching in the Yellow Sea: 《Advances in Atmospheric Sciences》2019年第2期219-230,共12页Xiangzhou SONG Rui Xin HUANG Dexing WU Fangli QIAO Guansuo WANG; funded by the National Natural Science Foundation of China (Grant Nos.41306003 and 41430963);the Fundamental Research Funds for Central Universities (Grant Nos.0905-841313038,1100-841262028 and 0905-201462003);the China Postdoctoral Science Foundation (Grant No.2013M531647);the Natural Science Foundation of Shandong (Grant No.BS2013HZ015); Horizontal velocity spirals with a clockwise rotation(downward looking) rate of 1.7?m^(-1), on average, were observed in the western and northern Yellow Sea from December 2006 to February 2007. With the observed therm...; 关键词：geostrophic SPIRALS HORIZONTAL DIFFUSION VORTEX STRETCHING and surface cooling effect

Relation between Spirals in Pre-Hispanic Design with Mathematics Spirals: 《Journal of Mathematics and System Science》2015年第10期429-434,共6页Jose Luis Mamani; The spiral has been studied for the first time in the book “About the spirals”, by Archimedes （Greece, 287-212 BC）. In America, the design of spirals seems to have been used previous to Archimedes＇ time, although...; 关键词：SPIRALS complementarity art CONSCIENCE unconscious.

Minimum Roadside Clearance Offsets on the Inside of Reverse Curves Based on Flat Spirals: 《Journal of Transportation Technologies》2015年第3期169-184,共16页Timur Mauga; Design guidelines require that high objects on the inside of horizontal curves be cleared so as to provide sufficient sight distance. An example of the guidelines that require such clearance is the AASHTO’s Green Boo...; 关键词：REVERSE CURVES Sight Distance ROADSIDE CLEARANCE Offset

Risk Premiums and Financial Stability: 《Journal of Modern Accounting and Auditing》2011年第8期792-798,共7页Bogdan Moinescu; The collective revelation of credit institutions as regards the imminence of specific risks materialising, which often follows long periods of underestimating probable losses, can trigger a broad-based financial delev...; 关键词：risk premium financial stability negative spirals of credit risk financial deleveraging CDS （credit default swap） spread

Seismic cyclic loading test of SRC columns confined with 5-spirals被引量：6: 《Science China(Technological Sciences)》2008年第5期529-555,共27页WENG ChengChiang YIN YenLiang WANG JuiChen LIANG ChingYu; Presented herein is an experimental study on seismic resistance of rectangular steel reinforced concrete (SRC) columns confined with a new type of multi-spiral cage. The multi-spiral cage is a device of five interconn...; 关键词：steel reinforced CONCRETE rectangular SRC column PRECAST construction 5-spirals CONCRETE CONFINEMENT cyclic loading test SEISMIC resistance

Topological Constraints on Scroll and Spiral Waves in Excitable Media: 《Chinese Physics Letters》2007年第6期1618-1621,共4页张宏胡斑比李炳伟段一士; Supported by the National Natural Science Foundation of China under Grant No 10675099, the Hong Kong Research Council （RGC）, and the Hong Kong Baptist University Faculty Research Fund （FRG）.; A conservation equation for topological charges of phase singularities （scroll and spiral waves） in excitable media is given. It provides some topological properties of scroll （spiral） waves： for example, the top...; 关键词：ROTATING SPIRALS TURBULENCE DRIFT DYNAMICS MODEL RINGS

China's‘Outbound Investment’Spirals up Fast: 《China Textile》2006年第2期23-23,共1页Zhao Hong; The source from MOC (Ministry of Commerce) releases that China’s outbound investment hit $6,920 million in 2005, rising by 53.6% while there were 1,067 new Chinese overseas operations as approved by MOC in 2005, 28.7...; 关键词：CDI China’s Outbound Investment Spirals up Fast MOC

SPIRALS