搜索结果: 1-15 共查到“spacing”相关记录63条 . 查询时间(0.09 秒)
Development of spruce (Picea abies [L.] Karst.) target (crop) trees in pole-stage stand with different initial spacing and tending regime
Norway spruce target trees promising trees different spacing different tending
2015/4/14
This paper presents findings of a twenty-year investigation of silviculture-production in a 40-year-old afforested spruce pole-stage stand located in a mountain region. The stand was established by fo...
Comparison of three methods to determine optimal road spacing for forwarder-type logging operations
forwarding production cost travelling model
2015/3/16
Optimum road spacing (ORS) of forwarding operation in Styria in Southern Austria is studied in this paper. In a harvesting operation it is important to compute the ORS to minimize the total cost of ha...
Nanoscale Structure of Type I Collagen Fibrils: Quantitative Measurement of D-spacing
Collagen fibril D-spacing 2D FFT AFM
2014/11/6
This article details a quantitative method to measure the D-periodic spacing of type I collagen fibrils using atomic force microscopy coupled with analysis using a two-dimensional fast fourier transfo...
3D FE Analysis of Effect of Ground Subsidence and Piled Spacing on Ultimate Bearing Capacity of Piled Raft and Axial Force of Piles in Piled Raft
Ground Subsidence Piled Raft Piled Spacing Bearing Capacity Axial Force 3D FE Simulation
2013/1/31
The effects of ground subsidence and piled spacing on axial force of piles in squared piled rafts were investigated using numerical analysis. Two cases of piled rafts in soft clay including case 1 (s ...
Crown Ratio and Relative Spacing Relationships for Loblolly Pine Plantations
Loblolly Pine Intensive Culture Planting Density Live Crown Ratio Relative Spacing Index
2013/3/4
Two loblolly pine (Pinus taeda L.) culture/density studies were established in 1995-1998 across the Lower Coastal Plain and Upper Coastal Plain/Piedmont regions of the southern USA. Each installation ...
Using the NLSY79 and NLSY79 Child and Young Adult Surveys, we investigate the effect of the age difference between siblings (spacing) on educational achievement. Because spacing may be endogenous, we ...
Level spacing of U(5) \leftrightarrow SO(6) transitional region with maximum likelihood estimation method
Level spacing of U leftrightarrow SO maximum likelihood estimation method
2011/7/20
In this paper,a systematic study of quantum phase transition within U(5) \leftrightarrow SO(6) limits is presented in terms of infinite dimensional Algebraic technique in the IBM framework. Energy lev...
Wide-Passband 88-Wavelength Channel-by-Channel Tunable Optical Dispersion Compensator with 50-GHz Spacing
Dispersion compensation devices Waveguides planar Gratings Spatial light modulators
2015/5/26
We realized a wide-passband multi-channel tunable optical dispersion compensator for 88 WDM signals with 50-GHz spacing by combination of an arrayed-waveguide and bulk gratings.It utilizes a novel opt...
Demonstration of Baud-Rate-Variable and Channel- Spacing-Tunable Demultiplexing of 10-40-Gbaud OFDM Subcarriers using a Multi-Tap Optical DFT
Fiber optics links subsystems Nonlinear wave mixing
2015/5/25
We experimentally demonstrate a tunable and reconfigurable optical DFT to demodulate 10-40-Gbuad OFDM with 2/3/4 subcarriers at 20/40GHz frequency spacing. Average power penalty of ~7 dB at BER of 10 ...
WDM Transmission of 152-Gb/s Polarization Multiplexed RZ-16QAM Signals with 25-GHz Channel Spacing over 15× ×80-km of SSMF
Fiber optical communications Fiber optics links subsystems
2015/5/22
We demonstrate transmission of 20×152-Gb/s PolMux-RZ-16QAM at a channel spacing of 25 GHz (5.68 b/s/Hz) over 15×80-km spans of SSFM. Coherent detection was used to recover the transmitted data and we ...
Impact of transparent network constraints on capacity gain of elastic channel spacing
network constraints channel spacing capacity gain
2015/5/15
We compare fixed-grid network architectures with variable-spacing OFDM based solutions. We show that capacity gains can reach up to 50% but are strongly affected by physical and topological constraint...
Investigation of level spacing distribution of nuclear energy levels by maximum likelihood estimation method
nuclear energy levels maximum likelihood estimation method Nuclear Theory
2011/10/11
Abstract: The nearest neighbor spacing distribution (NNSD) is one of common methods in statistical analysis of nuclear energy levels. In this paper, we have proposed Maximum Likelihood Estimation (MLE...
原地放垡振动间隔松土对羊草草地质量的影响（Effect of Situ-vibration Spacing Scarifying Technique to Leymus chinensis Grassland）
原地振动间隔松土 羊草草地 植被特性
2010/12/28
以河北坝上地区羊草草地为研究对象，采用野外取样与实验室分析相结合的方法研究了原地放垡振动间隔松土对羊草草地的影响。结果表明，羊草草地经过原地放垡振动间隔松土处理后，土壤容积密度降低、毛管持水力升高和土壤含水率增加，同时土壤养分也呈现不同程度的优化；植物高度、盖度、密度和地上、地下生产力提高，优良牧草所占的比例有所增加，草地群落的植物多样性得到提高；在草地处理3年内平均每公顷每年增加收入155元。
Effect of Planting Date and Intra-row Spacing on Growth, Yield and Quality of Taro
Planting Date Intra-row Spacing Growth Yield Quality Taro
2010/12/16
Effect of Planting Date and Intra-row Spacing on Growth, Yield and Quality of Taro。
Optimal and hysteretic fluxes in alloy solidification: Variational principles and chimney spacing
alloy solidification Variational principles chimney spacing
2010/11/16
We take a numerical approach to analyze the mechanisms controlling the spacing of chimneys -- channels devoid of solid -- in two-dimensional mushy layers formed by solidifying a binary alloy. Chimneys...