2) eigenvalue buckling analysis
特征值屈曲分析
1.
Eigenvalue buckling analysis of gravity support system of ITER based on ANSYS
基于ANSYS的ITER重力支撑系统特征值屈曲分析
2.
It is introduced how to analyze integral stability performance of the structure applying eigenvalue buckling analysis and all course tracing by non-linear finite elements.
介绍了特征值屈曲分析和非线性有限元全过程跟踪分析方法在结构整体稳定分析中的应用,以及钢屋面结构体系的布置情况和结构的空间受力体系,供类似工程参考。
3.
In general , it is believed that the critical load calculated by the eigenvalue buckling analysis is larger than that by the nonlinear buckling analysis, and imperfections applied according to the first eigenvalue buckling mode will reduce the critical load of the structure.
比较了不同的屈曲类型屈曲后平衡路径的发展特征及其缺陷影响,采用若干典型结构作为算例对特征值屈曲分析进行探讨,发现其适用范围为直柱、框架及平板结构,并以实际结构为例进行了验证。
3) soil-water characteristic curve
水分特征曲线
1.
In order to describe the relationship between matrix suction and water content,soil-water characteristic curve(SWCC) tests in lab and field were carried on.
为了描述非饱和土基质吸力与含水量的关系特性,进行了室内外土体水分特征曲线(SWCC)测试,分析了试样物质成分、塑性指数、孔隙结构、应力状态等因素对SWCC测试的影响;在自然边坡、挖方边坡、填方边坡上进行了基质吸力变化规律的实测,对比了在不同应力、填土条件下基质吸力变化规律的差异性。
2.
Based on the observation data of soil negative pressure h and soil water content θ obtained at the Luancheng Agricultural Ecosystem Station of Chinese Academy of Sciences,soil-water characteristic curve(h-θ carve)are described by using the van Genuchten model(VG model).
根据中国科学院栾城试验站大田土壤剖面所采土样实测土壤负压h和土壤含水率θ实验数据,采用van Genuchten模型来描述土壤水分特征曲线(h-θ曲线),VG模型中的参数利用Matlab非线性拟合函数来确定,通过对四参数模型和三参数模型的比较表明,四参数模型拟合的参数与三参数模型中的参数非常接近,但四参数模型能够更好地拟合实测数据,误差比三参数模型相对较小。
3.
A number of laboratory tests, including the microstructure, the strength and strain characteristics and the soil-water characteristic curves of Guangxi and Hefei expansive soils, were undertaken and the test results were analyzed based on the principle of unsaturated soil mechanics.
本文以国家自然科学基金课题“非饱和膨胀土的结构特征与结构强度研究”(批准号:40374047)为依托,以广西宁明膨胀土为研究对象,应用非饱和土土力学理论,进行了大量的室内试验研究,并对试验数据进行深入分析,主要就非饱和重塑膨胀土的微观结构特征、强度与变形特征以及水分特征曲线等方面取得了以下成果: 1。
4) moisture characteristic curve
水分特征曲线
1.
The paper surveys, determines and analyzes the moisture characteristic curve of feldsparthic sandstone which is widely distributed in the Huangpuchuan River basin and chestnut soil that takes feldsparthic sandstone as mother develop ment for approaching the usability of feldsparthic sandstone.
为探讨砒砂岩的可利用性,对皇甫川流域广泛分布的砒砂岩和以砒砂岩为母质发育的栗钙土的水分特征曲线进行了测定和分析,结果表明:栗钙土具有较好的透水性和持水性;紫红色砒砂岩的透水性与持水性比栗钙土好;白色砒砂岩的透水性和持水性相对较差。
2.
The determination of the moisture characteristic curve of unsaturated bentonite with saturated salt solution method is introduced in this paper.
鉴于膨润土各项性质研究的重要性 ,本文介绍了利用盐溶液法进行非饱和膨润土水分特征曲线的测定工作 ,发现盐溶液法适合测定吸力极高的非饱和土 ,是一种值得推广的方法。
5) water characteristic curve
水分特征曲线
1.
The study on characteristics of water characteristic curve of mixed stroma of the peat and soil
泥炭配合基质水分特征曲线的特性研究
2.
The seepage parameter test results for completely weathered granite at the Three Gorges Dam site are presented, including permeability and water characteristic curve obtained by in situ tests and those obtained by laboratory tests on disturbed/undisturbed samples.
介绍了三峡工程坝址区花岗岩全风化带的基本特征及其渗流参数实验研究结果，包括通过现场实验、室内原装样和扰动样实验取得的饱和渗透系数、非饱和水分特征曲线，分析了不同实验对花岗岩全风化带渗流特性的不同反映，指出了不同实验结果的意义和使用条件。
3.
By soil water dynamics principle there were determined soil water movement parameters on sandy land vineyard in laboratory, namely water characteristic curve, saturated water conductivity and unsaturated water conductivity, and the saturated water conductivity is 0\^12 cm\5min\+\{-1\}.
利用土壤水动力学原理 ,在室内测定了沙质土壤水分特征曲线、饱和导水率和非饱和导水率。
6) soil water characteristic curve
水分特征曲线
1.
Because direct measurement of suction is costly time, consuming and difficult, generally, suction is indirectly found with soil water characteristic curve, thus, the precision is not good enough.
针对测定非饱和土的吸力既费时、费钱，又困难，而且往往是通过水分特征曲线间接求取，以致其精度不够理想这一问题，尝试采用人工神经网络进行预测研究，将部分已有的试验数据（含水量，吸力数据）作为输入模式进行训练，然后利用网络参数进行相应的参数预测。
补充资料：接受者操作特征曲线
接受者操作特征曲线
receiver operating characteristic curve, ROC curve
接受者操作特征曲线(reeeiver operatingeharaetoristie eurve，ROC eurve)在信号检测论实验中，根据实验结果的若干对击中条件概率和虚报条件概率，在以击中条件概率为纵坐标、虚报条件概率为横坐标的直角坐标系上所画出的曲线。这条曲线表示被试的辨别力或感受性。 (全志成撰林仲贤审)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条