搜索结果: 151-165 共查到“characteristic”相关记录291条 . 查询时间(0.197 秒)
Characteristic of polymer sliding materials using to work at elevated temperature
Tribological properties polymer composites Sliding composite Glass carbon Mechanical properties
2009/12/2
Purpose: The purpose of this project was to estimate the possibility of using glass carbon particleste as a
reinforced component of polymer matrix in composites. Application as a basic components mod...
A minimalist model of characteristic earthquakes
minimalist model characteristic earthquakes
2009/11/12
In a spirit akin to the sandpile model of self-organized criticality, we present a simple statistical model of the cellular-automaton type which simulates the role of an asperity in the dynamics of a ...
Characteristic scales of earthquake rupture from numerical models
Characteristic scales earthquake rupture numerical models
2009/11/12
Numerical models of earthquake rupture are used to investigate characteristic length scales and size distributions of repeated earthquakes on vertical, planar fault segments. The models are based on e...
Forecasting characteristic earthquakes in a minimalist model
characteristic earthquakes minimalist model
2009/11/12
Using error diagrams, we quantify the forecasting of characteristic-earthquake occurrence in a recently introduced minimalist model. Initially we connect the earthquake alarm at a fixed time after the...
农田非结构特征视觉导航研究（Vision Navigation Based on Agricultural Non-structural Characteristic）
视觉 农田环境 聚类
2009/11/3
研究了农田非结构环境下，通过机器视觉提取导航线的处理算法。首先，根据农作物的特点提出了使用聚类的方法检测作业区域终点；其次，为避免噪声干扰，利用移动窗口检测二值图像白色像素的个数，确定导航路径区域；最后，使用改进的Hough变换提取导航线。实验表明，该算法可以准确提取绿色植物的行信息，处理一帧分辨率为320×240像素的彩色图像平均需要57.404ms，正确识别率达99%。
油气弹簧力学特性仿真（Analysis of Energy Indication Characteristic of Hydro-pneumatic Spring Based on Damping Valve Parameter）
油气弹簧 阻尼阀 阻尼力
2009/11/3
提出了针对油气弹簧力学特性研究的一种力学模型，根据分段线性速度特性的计算方法，运用薄板力学和流体力学基础理论，分别对开阀点和最大开阀点处的缝隙宽度、阀片预变形量以及限位挡圈等阻尼阀结构参数进行了设计，并通过修正的理想气体状态方程对油气弹簧弹性力进行了推导。通过台架性能试验与建模的仿真数据比较，验证了设计方法的正确性，最后编程分析了不同缸体和特性参数对油气弹簧速度特性的影响规律，为研究减振装置的内特...
三相不平衡系统谐波传输特性及其抑制（Harmonic Transmission Characteristic and Suppression of Unbalanced Power System）
不平衡系统 谐波传输特性 谐波抑制 总谐波畸变率
2010/8/17
以Yd11牵引变压器为例分析了不平衡电力系统多谐波源的传输特性，测试4种不同负载接入方式以揭示多谐波源之间的相互作用。采用4种不同的单相无源滤波器接入方案来补偿不平衡的谐波成分，得出当无源滤波器与非线性负载位于相同变电所同一相时具有最好的滤波效果，滤波后系统电流总谐波畸变率平均为4.2%，当滤波器与非线性负载位于不同变电所，在相同相时具有较好的滤波效果，补偿后系统电流总谐波畸变率平均为5.3%，但...
Landslides are natural hazards occurring in response to triggers of different origins, which can act with different intensities and durations. Despite the variety of conditions that cause a landslide,...
Recurrent frequency-size distribution of characteristic events
Recurrent frequency-size distribution characteristic events
2009/10/30
Statistical frequency-size (frequency-magnitude) properties of earthquake occurrence play an important role in seismic hazard assessments. The behavior of earthquakes is represented by two different s...
An Investigation on the Damping Characteristic of Polymer Concrete With Polyester Resin
Polymer concrete polyester resin damping
2009/10/14
In this study, the usability of polymer concrete in the manuacture of machine tool beds was investigated with respect to its damping characteristic. Samples which consisted of the same polyester resin...
轴向柱塞泵平面配流副润滑特征参数实时测量（Real-time Measurement on Lubrication Characteristic Parameters of Plane Port Pair in Axial Piston Pumps）
轴向柱塞泵 配流副 润滑特性
2009/9/25
为研究轴向柱塞泵配流副的摩擦学特性，建立了模拟配流机构的润滑特性试验系统，以实测润滑特征参数，对工况进行实时调节与控制，寻求良好的润滑状态。论述了配流副润滑特性试验研究的优点，根据润滑理论模型分析了供油压力和油膜厚度等主要特征参数，提出了膜厚反馈的电液控制配流副油膜动态试验装置的结构及关键技术。通过平面配流密封带多点实测膜厚、泄漏流量、摩擦转矩的试验数据表明，供油压力对密封带润滑油膜厚度、形态等的...
Multiply c-decomposable probability measures on R and their characteristic functions
Infinitely divisible measure decomposable probability measure selfdecomposable measure
2009/9/21
We obtain the characteristic functions of distributions
in LC,., i.e. a-times c-decomposable distributions in the class of
infinitely divisible distributions, where 0 < a < m, 0 < c < 1. The
charac...
使用小面积压板在重塑软粘土中进行压板沉陷试验，分析压板尺寸、土壤含水率、土壤密度及样筒筒径对土壤承载力的影响。试验曲线拟合表明重塑土壤的承压特性满足二阶多项式模型。由拟合方程分析可知，模型各项系数随含水率呈对数变化、随土样密度呈线性变化、随着密度和含水率的耦合关系呈对数变化，筒径变化使二次项系数符号发生变化。大田实际土壤的试验表明，其承压曲线也满足二阶多项式模型。 A plate sinkage ...
Ritt-Wu's Characteristic Set Method For Ordinary Di®erence Polynomial Systems With Arbitrary Ordering
dierence polynomial ascending chain characteristic set Ritt-Wu's zero decomposition theorem
2013/9/9
In this paper, a new Ritt-Wu's characteristic set method for ordinary di®erence systems is proposed, which is valid for any admissible ordering. New deˉnition for irreducible chains and new zero ...
A Characteristic Set Method For Ordinary Di®erence Polynomial Systems
di® erence polynomial ascending chain characteristic set coherence irreducibility zero decomposition theorem automated theorem proving
2013/9/9
We prove several basic properties for di®erence ascending chains including a necessary and su±cient condition for an ascending chain to be the characteristic set of its saturation ideal and a nec...