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3621
功率分流四分支轮系建模与承载特性分析
Published 2013-01-01“…In order to accurately obtain load characteristic of power split four-branching gear train with elastic supports,the mechanical structure model is established and the deformation coordination conditions are deduced.Considering that the center distance assembly errors,shaft crossed angle errors and bearing elastic support stiffness have a significant impact on the contact path direct and transmission error curves lead to a variation of time-varying mesh stiffness curves,therefore the power split situation in various errors is analyzed under the elastic support based on the load tooth contact analysis method.The results show that the different elastic support conditions can lead to the different simulation results,the elastic supports are more accord with the actual.A reference for the design and analysis of four-branching transmission system is provided.…”
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3622
Neuro Sliding Mode Control for Exoskeletons with 7 DoF
Published 2020-10-01“…Therefore, two-layer neural network (NN) is used to approximate the exoskeleton dynamics in the structure of the SMC. Stability of the NSMC is developed by using Lyapunov stability criteria. …”
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3623
基于Mecanum轮全向移动机构运动的控制律分析
Published 2014-01-01“…Based on the geometric characteristics of the Mecanum wheel,the control law of the omni-directional motion mechanism with 4Mecanum wheels is calculated,the variation law of the Mecanum wheel revolving speed is achieved.Then the motion process of the Mecanum wheel is simulated,the Mecanum wheel geometric parameters impact on its angular velocity and angular acceleration are analyzed and the method of improving the design structure of Mecanum wheel to decrease the torque impulse of the driven motor is proposed.According to the size of system expected displacement under setting speed,the motor revolving speed value is calculated by using permanent revolving speed control,the complexity of motor revolving speed control is reduced.Then the conclusion is applied in engineering practice,the theory is proved to be correct and reliable by the experiment data.…”
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3624
齿轮与轴压装过程过盈配合研究
Published 2014-01-01“…Due to the characteristics of good load capacity and simple structure etc,the interference fit is widely used in practice production.Because the assembly interference quantity between gear and shaft directly affects the working performance of gear transmission,it is important significance for studying the gear and axis interference fit.The calculation format of interference fit quantity is obtained by deriving theoretically the interference fit process of gear and axis.At the same time,the numerical calculation of the maximum amount of interference between gear and axis is carried out by using finite element method,the variation of stress distribution and fitting force is obtained.The results show that the theoretical calculation and finite element calculation are basically consistent,and a certain theory and basis for gear and axis interference design is provided and has important practical value.…”
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3625
The concept of home range in relation to elephants in Africa
Published 2004-12-01“…After reviewing earlier works on the concept the author focuses on core areas and reviews four methods of assessing the structure of core areas: minimum convex polygon, harmonic mean, cluster and kernel. …”
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3626
Characterization of the Vascular Bundles in Thyrsostachys oliveri
Published 2025-05-01“…This study provides insights into the structural variations of vascular bundles in T. oliveri at different heights, which are beneficial for optimizing the use of bamboo materials in various applications.…”
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3627
Effects of Different Land Use Types on Soil Quality and Microbial Diversity in Paddy Soil
Published 2025-07-01“…Path analysis further demonstrated that land use patterns indirectly affected microbial diversity via altering aggregate structure and nutrient availability. Overall, the Shrimp treatment outperformed others in improving soil structure and nutrient supply, whereas the Forestland treatment was more conducive to promoting aggregate stability in deeper soil. …”
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3628
A Field-Based Measurement and Analysis of Wind-Generated Vibration Responses in a Super-Tall Building During Typhoon “Rumbia”
Published 2025-04-01“…The accuracy of identifying dynamic characteristics of super-tall buildings under typhoon conditions, as well as their correlation with the vibration amplitude, remains unclear, limiting the effective assessment of the structural performance and optimization of wind-resistant designs. …”
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3629
Analysis of a self-supporting shell concrete roof with nonlinear coupled evolutive material parameters.
Published 2025-01-01“…In many concrete-design civil engineering constructions, structural analyses are performed through finite element methods on an ideal equivalent elastic homogeneous material. …”
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3630
Biology, Pathogenicity, and Genetic Diversity of the Rice Pathogen <i>Ustilaginoidea virens</i> in Heilongjiang Province, China
Published 2025-01-01“…Moreover, the genetic structure of <i>U. virens</i> was diverse and complex. …”
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3631
Influence of different types of margins in the fish assemblage from an urban river
Published 2022-08-01“…The pairwise comparison (similarity percentage) showed that the assemblage structure was different for the types of margins. The Canonical Correspondence Analysis explained 92.46% of the total data variation, showing the relationship of species to environmental data. …”
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3632
Habitat Stability Modulates Temporal β‐Diversity Patterns of Seagrass‐Associated Amphipods Across a Temperate–Subtropical Transition Zone
Published 2024-12-01“…We partitioned temporal β‐diversity into its turnover (i.e., species replacement) and nestedness (i.e., differences in species composition caused by species losses) components and addressed the relative influence of both temporal variation in habitat structure (i.e., biotic driver) and environmental conditions on the observed β‐diversity patterns. …”
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3633
Designing host-associated microbiomes using the consumer/resource model
Published 2025-01-01“…They have been used to model the variation of protein sequences, entire genomes, and RNA sequencing profiles. …”
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3634
New type of symmetry inhomogeneity in β-TCP-type phosphors: symmetrical features of mixed oxysalts
Published 2025-07-01“…The emission intensity changes correspond to variations in the anionic part of the structure while maintaining constant activator concentration. …”
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3635
Study on the gene mapping and formation mechanism of historical buildings influenced by multiculturalism: A case of Gulangyu, China
Published 2025-08-01“…Connectivity and integration illustrate the ''Compromise'' between local and foreign planar prototypes. Topological structures and topological depth represent the ''Variation'' influenced by foreign planar prototypes.…”
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3636
Comprehensive Substantiation of the Impact of Pre-Support Technology on a 50-Year-Old Subway Station During the Construction of Undercrossing Tunnel Lines
Published 2025-07-01“…The construction scheme with pre-support can more significantly control structural deformation, reduce stress variations in existing line structures, and minimize damage to concrete structures. …”
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3637
Gut microbiota profiles of peninsular Malaysian populations are associated with urbanization and lifestyle
Published 2025-07-01“…However, whether populations of Malaysia exhibit variations in their microbiome, and to what extent host lifestyle correlates with these variations, remains unclear. …”
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3638
Delay effect of Yellow River discharge on the water exchange through the Bohai Strait
Published 2025-04-01“…Through a series of numerical experiments, we found that the two-layer structure was induced by density-driven currents and was strongest in summer. …”
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3639
Effects of aging on gene expression networks in the Drosophila genetic reference panel
Published 2025-07-01“…Summary: The genetic basis of naturally occurring variation in organismal senescence and lifespan remains largely unknown. …”
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3640
MANTLE TERRANES OF THE SIBERIAN CRATON: THEIR INTERACTION WITH PLUME MELTS BASED ON THERMOBAROMETRY AND GEOCHEMISTRY OF MANTLE XENOCRYSTS
Published 2019-06-01“…We have studied variations in the structure and composition of minerals from the pipes of the Yakutian kimberlite province (YKP) in different mantle terranes of the Siberian craton. …”
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