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Radial Variation of Wood Anatomical Properties Determines the Demarcation of Juvenile-MatureWood in Schima superba
Schima superba Radial Variation Wood Anatomical Properties Determines
2023/6/2
Schima superbais a precious broadleaf tree species that produces excellent timber. Analyzing the radial variation of wood anatomical properties within stems and determining the boundary between the ju...
中国地质大学科学技术发展院李旭（博士研究生），文章*，等，环境学院. Journal of Hydrology (2019)，A mobile-immobile model for reactive solute transport in a radial two-zone confined aquifer
注水井；滤料充填；泥浆入侵；生物；化学堵塞
2021/10/15
近日，国际著名期刊《Journal of Hydrology》刊发了中国地质大学环境学院文章教授团队的最新研究成果——“A mobile-immobile model for reactive solute transport in a radial two-zone confined aquifer”。论文第一作者为环境学院2016 级博士研究生李旭，通讯作者为文章教授。
A ROBUST METHOD FOR FUNDAMENTAL MATRIX ESTIMATION WITH RADIAL DISTORTION
Machine Vision 3D Reconstruction Robust Method Fundamental Matrix Epipolar Geometry SVD
2018/5/16
Fundamental Matrix Estimation is of vital importance in many vision applications and is a core part of 3D reconstruction pipeline. Radial distortion makes the problem to be numerically challenging. We...
RESEARCH ON AIRCRAFT TARGET DETECTION ALGORITHM BASED ON IMPROVED RADIAL GRADIENT TRANSFORMATION
Aircraft Target Detection Radial Gradient Transformation Rotation-Invariant Feature Polar Form Look-up Table
2018/5/17
Aiming at the problem that the target may have different orientation in the unmanned aerial vehicle (UAV) image, the target detection algorithm based on the rotation invariant feature is studied，and t...
A DEM Construction Method for Inconstant Inter-Tidal Zone Base on Short-Interval, High Frequency MODIS Data Set: A Case Study in the Dongsha Sandbank of the Jiangsu Radial Tidal Sand-Ridges
Remote sensing Tidal-flat Elevation Inversion Short-interval & High-frequency MODIS Data Set
2015/11/23
Surface elevation is a critical data for geo-science study. As far as some regions with rapidly-changing in landform, analyzing the surface elevation of different periods help provide scientific basis...
Radial Spatial Division Based On and Restrained Edge Mosaic In Constructed Tin
TIN Algorithm Time complexity
2015/7/14
To insert restrained edges into TIN is of great necessity in many fields. At present, for the need of mass data processing, it is
expected that the time efficiency of the algorithm be higher and high...
Camera Calibration with Radial Variance Component Estimation
Camera Calibration Geometrical Accuracy Variance Component Estimation UAV System Evaluation
2014/12/4
Camera calibration plays a more and more important role in recent times. Beside real digital aerial survey cameras the photogrammetric market is dominated by a big number of non-metric digital cameras...
Assimilating Doppler radar radial velocity and reflectivity observations in the weather research and forecasting model by a proper orthogonal-decomposition-based ensemble, three-dimensional variational assimilation method
Assimilating Doppler radar radial velocity and reflectivity observations in the weather research and forecasting model proper orthogonal-decomposition-based ensemble three-dimensional variational assimilation method
2013/9/2
Doppler radar observations with high spatial and temporal resolution can effectively improve the description of small-scale structures in the initial condition and enhance the mesoscale and microscale...
Explicit Analytical Solutions of Radial Permeable Power Rate Flow
non-Newtonian fluid analytical solution permeable power rate flow
2011/8/4
The research of different kinds of permeable non-Newtonian fluid flow is increasing day by day owing to the development of science, technology and production modes. It is most common to use power rate...
在9R-40型揉碎机上设计安装径向强制喂入装置，通过改变揉碎机主轴转速、喂入辊转速和喂入口处锤片形状，进行揉碎机的性能试验。采用正交试验方法分析3个因素对揉碎机性能的影响，得出了生产率的最优组合参数为：揉碎机主轴转速为2980r/min、喂入辊转速为267 r/min、锤片形状是槽型锤片。带径向喂入装置的揉碎机与不带喂入装置、采用人工喂料的原机对比试验表明，生产率提高了30%左右。
阶梯隔舌对离心泵压力脉动和径向力影响的数值模拟（Numerical Simulation on Pressure Fluctuations and Radial Hydraulic Forces in Centrifugal Pump with Step-tongue）
离心泵 阶梯隔舌 动静干涉 径向力
2010/12/29
通过改变隔舌形状，采用SST模型分别对常规隔舌和阶梯隔舌蜗壳的离心泵进行全流道非稳态数值模拟。通过模拟分别获得了常规隔舌和阶梯隔舌蜗壳的离心泵压力脉动特性、作用在蜗壳和叶轮上的径向力特性，并对其进行比较分析。结果表明：采用常规隔舌和阶梯隔舌时，离心泵进出口压力、作用在蜗壳和叶轮上的径向力均随时间呈周期波动，脉动频率均以叶片通过频率为主；采用阶梯隔舌蜗壳后，进出口压力大小值和脉动幅值均明显减弱，高频...
Modeling and Analysis of Novel Integrated Radial Hybrid Magnetic Bearing for Magnetic Bearing Reaction Wheel
magnetic bearing reaction wheel radial hybrid magnetic bearing
2011/8/3
Conventional ball bearing reaction wheel used to control the attitude of spacecraft can’t absorb the centrifugal force caused by imbalance of the wheel rotor, and there will be a torque spike at zero ...
WATER STATUS,NUTRIENTS AND RADIAL INCREMENT OF PEDUNCULATE OAK (Quercus robur L.) IN NORTHERN SERBIA AND COMPARISON WITH SELECTED SITES IN SLOVENIA
pedunculate oak pre-dawn water potential growth oak decline nutrient status
2009/11/27
Two adult oak tree groups in northern Serbia, differing in degree of decline, were studied. Measurements of pre-dawn water potential (PWP), nutrient status and radial growth were performed and compare...
双蜗壳泵压力脉动特性及叶轮径向力数值模拟（Numerical Simulation of Pressure Fluctuation and Radial Force in a Double Volute Pump）
双蜗壳泵 压力脉动 径向力
2009/11/24
为揭示双蜗壳离心泵的水力不稳定性，采用雷诺时均方法和SST k-ω湍流模型，对一双蜗壳双吸离心泵进行了三维非定常湍流数值模拟，得到了泵内部流场特性及双蜗壳内压力脉动情况，并对其进行了频谱分析。结果表明双蜗壳内存在比较明显的压力脉动。设计工况下压水室内的压力脉动强度小于非设计工况。在设计工况下，隔舌处和隔板区压力脉动频率均以叶片通过频率为主，其中隔板起始端的脉动幅值最大，约为隔舌处的2.5倍。在大流...
Variation in the Mass Transfer Coefficients in the Radial Direction for Submerged Impinging Multi-Jet Flow of Fluid Electrolyte
Multi-jets Disc distributor Nozzle-hole Electrolytic cell Stagnation point
2009/10/9
This paper presents the second part of experimental results for the mass transfer coefficients in the radial direction from the stagnation point of a multi-jet flow. Two more regions are identified ...