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在非惯性质心参考系中的能量规律 被引量:1
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作者 许钟城 《河池师专学报》 1999年第4期1-4,共4页
提出非惯性质心系之概念,推导出非惯性质心系中质点组动能定理、功能原理、机械能守恒定律。
关键词 惯性质心参考系 能量规律 动能定理 机械能守恒定律 功能原理 质点组
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平动非惯性质心参考系动力学规律的应用 被引量:1
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作者 刘传跃 《物理教师》 CAS 北大核心 2021年第6期66-69,共4页
平动非惯性质心参考系具有一些特殊的性质,可方便地解决在惯性参考系中较为复杂的问题.本文将讨论平动非惯性质心参考系的动力学规律并给出相应实例.
关键词 平动非惯性质心参考系 动力学 应用
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On the intraspecific variability in basal metabolism and the food habits hypothesis in birds 被引量:1
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作者 F. BOZINOVIC P. SABAT 《Current Zoology》 SCIE CAS CSCD 北大核心 2010年第6期759-766,共8页
The food habits hypothesis (FHH) stands as one of the most striking and often-cited interspecific patterns to emerge from comparative studies of endothermic energetics. The FHH identifies three components of diet th... The food habits hypothesis (FHH) stands as one of the most striking and often-cited interspecific patterns to emerge from comparative studies of endothermic energetics. The FHH identifies three components of diet that potentially produce variability in mass-independent BMR, i.e. food quality, food availability, and food predictability or environmental productivity. The hypothesis predicts that species with diets of low energy content and/or low digestibility should evolve low mass-independent BMRs. The effects of food habits on BMR have been widely investigated at the interspecific level, but the variation between individuals and populations has been largely ignored. Our focus is to compare predictions derived from interspecific studies with data collected from within-species studies to explore the mechanisms and functional significance of adaptive responses predicted by the food-habits hypothesis among birds. We conclude that if BMR is correlated with daily energy expenditure, then organisms that can lower BMR will reduce daily energy expenditure and hence, food requirements. Birds that lower BMR in stressful environments may increase survival. Nevertheless, the mechanism (s) by which birds eating a low quality diet reduce BMR and whether lower BMR affects fitness remain to be determined [Current Zoology 56 (6): 759-766, 2010]. 展开更多
关键词 Intraspecific comparisons Avian energetics Food habits hypothesis DIET Basal metabolic rate
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FORMATION OF LARGE-SCALE TECTONIC ELEMENTS FROM THE POSITION OF CENTRIFUGAL-INERTIAL FORCE ACTION
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作者 Molchanov V. I. Paraev V. V. 《Geotectonica et Metallogenia》 2005年第1期13-33,共21页
We describe the earlier unknown, when applied to global tectonics, centrifugal inertial mechanism of lithosphere plate moving under the effect of forces appearing as a result of Earth’s planetary rotation. The mechan... We describe the earlier unknown, when applied to global tectonics, centrifugal inertial mechanism of lithosphere plate moving under the effect of forces appearing as a result of Earth’s planetary rotation. The mechanism stated gives an insight into global tectonics of plates with the indirect participation of emanation streams which, in their turn, are the derivatives of centrifugal and inertial forces of planetary motion. The application of this mechanism provides a logical explanation for the regularities of global tectogenesis including the formation of mountain ridges mainly of submeridional and sublatitudinal strike, and also the drift of continental plates from the east to the west and from the south to the north. The mechanism clarifies the significance of the Arctic and the Antarctic Circles as geodynamic barriers. 展开更多
关键词 formation tectonic element centrifugal-inertial force section
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Frictional characteristics of granular system under high pressure 被引量:1
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作者 曹秒艳 彭雅新 +2 位作者 赵长财 董国疆 杜冰 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第5期1132-1141,共10页
In order to reveal the force transmission features of the granules in the solid granule medium forming(SGMF) technology,the frictional characteristics of the non-metallic granule medium(NGM) under high pressure were i... In order to reveal the force transmission features of the granules in the solid granule medium forming(SGMF) technology,the frictional characteristics of the non-metallic granule medium(NGM) under high pressure were investigated by tests and simulations.And the relevant changing curves of the internal friction coefficient of the granular system under different normal pressures were obtained by self-designed shear test.By the granule volume compression test,the accurate discrete element simulation parameters were obtained,based on this,the discrete element method(DEM) was adopted to reveal the evolution law of the NGM granules movement in the sample shear process from the microscopic view.Based on the DEM,the influence of granule diameter,surface friction coefficient,normal pressure and shear velocity on the internal friction coefficient of the granular system were studied.And the parameters were conducted to be dimensionless by introducing the inertia coefficient.Finally,the expression showing power-law relationship of inertia coefficient,surface friction coefficient and internal friction coefficient is obtained. 展开更多
关键词 GRANULE friction coefficient discrete element method inertia coefficient
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Proton Orbital[541]1/2 and Backbending in ^(178)W
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作者 WEI Zhi-Yuan LIU Shu-Xin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第9期715-718,共4页
The microscopic mechanism of nine experimentally observed bands in ^178W is investigated using the particle-number conserving method of the cranked shell model with monopole and quadrupole paring interactions. The exp... The microscopic mechanism of nine experimentally observed bands in ^178W is investigated using the particle-number conserving method of the cranked shell model with monopole and quadrupole paring interactions. The experimental results, including the moments of inertia and angular momentum alignments of nine bands in ^178W, are reproduced well by the particle-number conserving calculations, in which no free parameter is involved. Calculations demonstrate that occurrence of sharp backbending comes mainly from the contribution of high-j intruder orbitals vi13/2 or πh11/2 and their interference effect with orbitals near the Fermi surface. Theω variation of the occupation probability of each cranked orbital and the contribution to moment of inertia from each cranked orbital are analyzed. 展开更多
关键词 BACKBENDING cranked shell model moment of inertia pairing interaction
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Separation Problem in Satellite Gravimetry
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作者 SHEN Wenbin NING Jinsheng Key Lab. of Geospace Environment and Geodesy, MEC School of Geodesy and Geomatics, Wuhan University, 129Luoyu Road, Wuhan 430079, China 《Geo-Spatial Information Science》 2007年第1期4-11,共8页
The problem of separating gravitation from inertia is discussed in very general sense, and the conclusion is positive: man can separate gravitation from inertia, if various observation techniques are applied for. The ... The problem of separating gravitation from inertia is discussed in very general sense, and the conclusion is positive: man can separate gravitation from inertia, if various observation techniques are applied for. The accelerometer's position problem in satellite gravimetry is investigated, and the additional acceleration effect due to the position error of an instrument as well as the difference between the mass center and the gravity center is explored. 展开更多
关键词 separation of gravitation and inertia satellite gravimetry mass and gravity centers position error extra acceleration
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Impact of Crust Matter on Properties of Neutron Star with Supersoft Symmetry Energy
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作者 黄啟志 文德华 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第4期729-732,共4页
By employing three typical equations of states (EOSs) of the crust matter, the effect of the crust on the structure and properties are investigated, where the core matter is described by the MDIxl model and the non-... By employing three typical equations of states (EOSs) of the crust matter, the effect of the crust on the structure and properties are investigated, where the core matter is described by the MDIxl model and the non-Newtonian gravity (described by the Yukawa contribution) is considered. It is shown that the EOSs of the crust matter have a notable effect on the mass-radius relation and the moment of inertia. 展开更多
关键词 neutron star 04.40.Dg 26.60.-c crust symmetry energy
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张雪松劳模创新工作室
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作者 唐咏梅 《现代班组》 2015年第5期45-45,共1页
全国示范性劳模创新工作室我叫张雪松,来自中国北车唐山轨道客车有限责任公司。2015年1月28日,在河北省职工技术创新工作推进会上,我们的国家级技能大师工作室荣获由中华全国总工会授予的"全国示范性劳模创新工作室"称号,工... 全国示范性劳模创新工作室我叫张雪松,来自中国北车唐山轨道客车有限责任公司。2015年1月28日,在河北省职工技术创新工作推进会上,我们的国家级技能大师工作室荣获由中华全国总工会授予的"全国示范性劳模创新工作室"称号,工作室的工作得到了认可。工作室由6名获得中国北车"金蓝领"称号的核心成员。 展开更多
关键词 中华全国总工会 金蓝领 轨道客车 技术创新工作 张雪 高技能人才 一本 铝合金车体 一线操作 惯性质
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Path planning of unmanned aerial vehicle based on improved gravitational search algorithm 被引量:20
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作者 LI Pei DUAN HaiBin 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第10期2712-2719,共8页
Path planning of Uninhabited Aerial Vehicle(UAV) is a complicated global optimum problem.In the paper,an improved Gravitational Search Algorithm(GSA) was proposed to solve the path planning problem.Gravitational Searc... Path planning of Uninhabited Aerial Vehicle(UAV) is a complicated global optimum problem.In the paper,an improved Gravitational Search Algorithm(GSA) was proposed to solve the path planning problem.Gravitational Search Algorithm(GSA) is a newly presented under the inspiration of the Newtonian gravity,and it is easy to fall local best.On the basis of introducing the idea of memory and social information of Particle Swarm Optimization(PSO),a novel moving strategy in the searching space was designed,which can improve the quality of the optimal solution.Subsequently,a weighted value was assigned to inertia mass of every agent in each iteration process to accelerate the convergence speed of the search.Particle position was updated according to the selection rules of survival of the fittest.In this way,the population is always moving in the direction of the optimal solution.The feasibility and effectiveness of our improved GSA approach was verified by comparative experimental results with PSO,basic GSA and two other GSA models. 展开更多
关键词 uninhabited aerial vehicle path planning gravitational search algorithm social information weighted value selection rules
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Moments of inertia of neutron stars in relativistic mean field theory:The role of the isovector scalar channel
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作者 Zhuang Qian RuoYu Xing BaoYuan Sun 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2018年第8期54-60,共7页
With the inclusion of the isovector scalar channel in the meson-nucleon couplings, taking DD-MEδ as an effective interaction, the moments of inertia of neutron stars possessing various stellar masses are studied with... With the inclusion of the isovector scalar channel in the meson-nucleon couplings, taking DD-MEδ as an effective interaction, the moments of inertia of neutron stars possessing various stellar masses are studied within the density dependent relativistic mean field (RMF) theory. The isovector scalar channel contributes to the softening of the neutron-star matter equation of state (EOS) and therefore the reduction of the maximum mass and radius of neutron stars. Smaller values of the total moment of inertia 1 and the crustal moment of inertia AI are then obtained in DD-ME~ via numerical procedure in comparison with those in other selected RMF functionals. In addition, the involvement of the isovector scalar channel lowers the thickness of the neutron star crust and its mass fi'action as well. The sensitivity to both the crustal mass and stellar radius causes the crustal moment of inertia to be more obviously reduced than the total one, eventually leading to a suppression on the fraction of crustal moment of inertia △I/I in DD-MFδ. The results indicate the crustal moment of inertia as a more sensitive probe of the neutron-star matter EOS than the total one, and demonstrate that the isovector scalar meson-nucleon couplings in the RMF theory could exert influence over the physics of pulsar glitches. 展开更多
关键词 neutron star moment of inertia relativistic mean field theory isovector scalar channel
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