查询词典 reverse curve

Oxyhydrogen isotope relationship curve in the region indicates that the samples basically distribute in the upper left of local rainwater line and an obvious phenomenon of reverse "Oxygen drifting" exists. This kind of isotope distribution is the only one in the most karst groundwater in northern karat spring area that the authors have ever studied.

该区岩溶地下水氢氧同位素关系图表明，其样点基本分布在当地雨水线左上方，存在明显的反向"氧漂移"现象，这种现象在作者所见到我国北方多数岩溶泉域岩溶地下水的同位素分布是唯一的。

The technique of curve fitting is used proverbially for the image processing, reverse engineering, test data processing, etc.

摘 要：曲线拟合技术在图像处理、逆向工程以及测试数据的处理等领域中的应用越来越广泛。

To fulfill the need of the application of RP technique in medical domain, reverse CAD modeling from medical cross sections is systematically studied in this dissertation. Firstly, Some algorithms related to the research of this dissertation are studied. New algorithms for orientation and inclusion test for simple polygon, an error constrained automatic faring algorithm for B-spline curve and a theorem regarding the termination criterion for subdivision of triangular Bézier patch are proposed. Then based on similarity between contours of adjacent sections, a methodology for surface reconstruction from cross sections is presented. Finally, a virtual measuring method is proposed.

本文针对RP技术在医学领域应用的需要，系统研究了基于医学断层轮廓数据的反求CAD建模理论和方法：(1)在基础算法研究部分，提出了简单多边形方向及点在多边形内外判断的新方法、三角Bézier曲面片离散的误差控制定理和一种带误差约束的B样条曲线的自动光顺方法；(2)提出了一种基于相邻层轮廓相似性的医学断层轮廓数据曲面重构方法；(3)提出了一种称为"虚拟测量"的曲面模型处理方法。

On the basis of census of all individuals of the populations at different plots, the structure and dynamics of the populations were described. The result showed that P. tabulaeformisf.shekannesis were growing populations, and the distributions of the structure were reverse J. The density decreased with the increasing of Size-class structure. The populations developed the characteristic of increasing in the early stage and stabilizing in the late. The survive curve of Pinus tabulaeformisf.shekannesis were between DeeveyⅡand DeeveyⅢ. The analysis of time sequence showed that most of the inividuals would be adult after 20 years.

结果表明：柴松种群结构呈反J分布型，种群处于增长阶段；种群的密度随径级的增加而降低，种群密度与径级呈现出明显的负相关；四个函数估计值说明柴松种群具有前期增长、后期稳定的特点，其存活曲线介于DeeveyⅡ型和DeeveyⅢ型之间；随时间推移，种群中树和大树数量逐渐增多，种群在20年后开始大量进入成熟阶段。

It is found that the low dielectric constant inhibits the disproportion of pyrogallic, but it can be settled by increasing the pH or the water content of the reverse microemulsion to obtain a stable generation of the substrate. Then the activity of SOD is determined in such a system and a bell -shaped curve of the activity vs. W〓 is obtained although only subactivity is found. The reasons can be attributed to the low dielectric constant and the attraction of CTA〓.

的介电常数的降低对邻苯三酚的自氧化有抑制作用，因此实验中通过提高CTAB微乳液的表观pH或增大水化度即W〓，最终得到了一定浓度的底物超氧阴离子O〓〓·，保证了SOD活性的测定，并得到了SOD酶活性随含水量变化的&钟形&曲线。

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特别是在手机及电脑周边行业，本公司自主研发的手机按键寿命试验机，手机翻盖寿命试验机，手机滑盖寿命试验机，手机跌落试验机，手机扭转试验机，手机外壳摩擦试验机，RCA纸带耐磨试验机，便携电子产品专用跌落试验机，全自动扭力寿命试验机，转轴寿命试验机，荷重位移曲线试验机，鼠标滚轮寿命试验机，插拔力试验机，伺服系统全自动插拔力试验机，笔记本电脑耐压试验机，LCD耐压试验机，万能材料试验机，伺服系统材料试验机等被各大制造厂商广泛采用本公司产品完全符合EN、DIN、BS、ASSTM、JIS、GB、ISO…等标准。

According to the basic characteristics of solute migration on chromatographic columns , eluting curve expression has been obtained under the conditions of balance chromatography without considering the reverse flow.

根据溶质在色谱柱中迁移的基本特征，在平衡色谱和不单独考虑逆向流的简化情况下，得到了流出曲线的表达式。

Researching on the actuality of reverse engineering and the usage of it, in the authors opinion, it is required to process original data satisfying the requirements of CAD/CAM software; and it is worth to emphasize the research work on curve and surface construction methods, to develop relative data-process software.

通过对逆向工程当前研究现状及实际应用情况的分析研究，指出逆向工程当前需要解决的关键问题是对原始测量数据进行必要的处理，使其适应CAD/CAM软件造型的数据要求；同时对曲线、曲面构形方法也需加强研究，并开发相应的数据处理软件。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。