ascending curve
- ascending curve的基本解释
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上升曲线
- 相似词
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In this paper, a region approximation idea that means using a "fat curve" with a width to approximate the offset curve is proposed, and a complete set of algorithms to approximate offset curve using disk Bézier curve are given and implemented. In the algorithms, the optimal and uniform approximate curve of the offset curve as the central curve of the Disk Bézier curve is found by using Remez method, and then the upper optimal and uniform approximation principle is proposed to compute the error radius function of the Disk Bézier curve. Thus, the whole Disk Bézier curve can be obtained. In the end of this paper, the approximate effect of the Disk Bézier curve is not only analyzed and assessed, but also some specific examples are provided.
提出用一条带宽度的"胖曲线"来逼近上述等距曲线的区域逼近思想,并建立与实现了圆域Bézier曲线等距逼近的整套算法,包括应用Remez方法求出等距曲线的最佳一致逼近曲线作为圆域Bézier曲线的中心曲线,提出上控最佳一致逼近的原理求出圆域Bézier曲线的误差半径函数,以及确定整条圆域Bézier曲线,最后还对该圆域Bézier逼近的效果做了分析和考核,并给出了一些具体实例。
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This paper establishes cubic spline function, analyzes subsection curve function and curve slope and curvature, at last decides to place the curve especial points which can be obtain easement curve length and other line parameters, such as the ZH point (end of line and beginning of transition curve), the HY point (end of transition curve and beginning of circular curve), the QZ point, the YH point (end of circular curve and beginning of transition curve), the HZ point (end of transition curve and beginning of line).
针对公路平面线形的8种组合类型,其线形元素特征则由最基本的直线、圆曲线、缓和曲线组成的特点,解析三次样条函数模型,得分段曲线函数、曲线斜率、曲率,从而确定曲线特征点(直缓ZH点、缓圆HY点、曲中QZ点、圆缓YH点、缓直HZ点)位置,进而得到曲线缓和曲线长度及其他线形参数。
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Results: The renal perfusion was increased in diabetes group after the injection of alloxan. The PSI, AUC and ascending slope rate of the curve of the time-intensity curve were increased in 1w and 2w with decreased of HPT; the pathological examination exhibited glomeruli hypertrophy and no thickening of basal lamina. The PSI and AUC in 4w and 6w were more than that of control group; the PIT and ascending slope rate of the curve got closed to normal in 4w and 6w; the intercapillary cells increased. The speed of ascending slope rate of the curve in 8w, 10w and 12w was slower, shown as PIT and HPT delayed; the pathological examination showned increasing of mesangial cell, hyperplasia of mesangial matrix and thickening of basal lamina, followed with obliteration of partial micrangium, glomerular sclerosis and reduce of PSI in 12w.
结果:糖尿病组兔注射四氧嘧啶后肾皮质血流灌注增大,1周、2周表现为时间-强度曲线参数中峰值强度升高、曲线下面积增大、达峰时间缩短、曲线上升斜率升高,此时病理可见肾小球肥大,系膜基质正常,基底膜无增厚;4周、6周,峰值强度、曲线下面积高于对照组,达峰时间、曲线上升斜率接近正常,系膜细胞增多。8周、10周、12周,达峰时间延长、曲线上升斜率减慢、峰值强度减半时间延长,病理出现肾小球系膜细胞明显增多,系膜基质增生,基底膜增厚,至12周病理出现部分毛细血管管腔闭塞,肾小球节段性硬化,峰值强度测值减低。
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ascending mesocolon:升结肠系膜
升结肠|ascending colon | 升结肠系膜|ascending mesocolon | 升支|ascending branch; ascending branch; ascending branch; ascending branch; ascending ramus
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ascending chain condition:升链条件
ascending 上升的 | ascending chain condition 升链条件 | ascending difference 后向差分
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ascending colon:上行结肠
ascending aorta 上行织脉 | ascending colon 上行结肠 | ascending hemiplegia 上行性偏瘫