查询词典 second derivative

Based on the simulated data produced by PROSAIL model and field test data, the authors respectively analyzed many kinds of factors which affect some representative inversion method s, such as VI, second derivative, model inversion and the directional second derivative.

以PROSAIL模型模拟数据和地面实测数据为基础，分别分析了土壤背景、冠层反射率非各向同性以及随机噪声等因素对几类代表性反演方法的影响(植被指数法、二阶微分法、模型反演法以及方向性二阶微分法)。

By means of the Hermite interpolation formula with second derivative,a type of integrating formulas with second derivative is derived.

利用带二阶导数的Hermite插值公式，导出一类具有二阶导数的求积公式。

The results showed that there were three minimum values in the second derivative spectrums of normal person, in contrast there were four minimum values in most diabetic second derivative spectrums, the diabetic urine had one minimum value more than normal urine during the range from 550 nm to 570 nm.

发现健康人的二阶导数光谱都有三个极小值，与之形成对比的是绝大多数糖尿病患者的二阶导数光谱却有四个极小值，糖尿病患者的尿样在550 nm～570 nm区间范围内比健康人多出一个极小值。

By analyzing, an adaptive mode of linear filter based on DCT is given out. The curves of the vertical second derivative of gravity anomaly are matched well with those of the academic second derivative, and the calculating precision is much higher.

通过分析给出了基于DCT的合适的线性滤波方式，滤波后的重力异常垂向二阶导数与理论二阶导数拟合效果好，具有较高的计算精度。

Outlined in the Beijing Olympic Games, at 13:30 on August 13 Switzerland and France than was Ankan Qiela La Road Cycling Championship. Ankan Qiela La France in the World Championships: 2004 Bardolino, Italy was eighth, 2005 Madrid, Spain, was third, 2006 Salzburg, Austria received first place in 2007 at Stuttgart, Germany was the first ; France 2005 cycling sai Laise Skopje was seventh; Flanders Cycling Grand Prix E3 second place; Belgium Harelbeke 2007 Road Cycling sai second place; Florence - Bicycle sai Pistoia, Italy Paper 2004 Si Tuoya fourth; Ghent - Victoria Buddhist roots bike sai fourth; Road Cycling Events, the Belgian peacekeepers Buddhist roots fourth in 2006 Belgian peacekeepers were sixth Buddhist roots; HEW Classic Bicycle Germany 2005 Hamburg Road Cycling sai fourth in the 2006 German Beer, Luke second Challenge; Milan - San Remo Road Cycling sai second place; San Remo, Italy, the 2008 Road Cycling sai was the first; Monte Siena, Italy 2008 Paschi Eroica Road Cycling sai was the first Swiss national championships, in 2008 Switzerland was the first Messen; Stettlen 2007 Switzerland was the first in 2006 was the first Ruishiboning root 2005 Switzerland was the first Hagendorn; Highway Cycling Merit 2007 Rui Shibu Kruger was second in Paris - Roubaix bicycle sai , 2006 France was the first Roubaix; Roubaix France was second in 2008; 2005 Roubaix France was eighth; Denmark Post bike sai The 2006 final ranking was the first Danish Frederiksberg; ring The 2006 Belgian Flanders Cycling Road Cycling sai Meerbeke was sixth; Etruscan - Adriatic bike sai , 2008 Italy's Benetton and child care - Badelt-care was the first in the Central bike sai Luxembourg, Luxembourg Central Di Jixi 2005, was second; bike sai Central California, the United States in 2008 in Pasadena, California, was fourth ; Athens, Greece in 2004 was the 10th individual time trial; Olympics

瑞士法比安坎切拉拉在世界锦标赛：2004 意大利巴多利诺上获得第八名，2005 西班牙马德里上获得第三名，2006 奥地利萨尔茨堡上获得第一名，2007 德国斯图加特上获得第一名；2005 法国莱塞比耶自行车赛获得第七名；佛兰德E3自行车大奖赛获得第二名；2007 比利时哈勒尔贝克公路自行车赛获得第二名；佛罗伦萨-皮斯托亚自行车赛，2004 意大利皮斯托亚获得第四名；根特-维佛根自行车赛获得第四名；公路自行车赛 2005 比利时维佛根获得第四名；2006 比利时维佛根获得第六名；HEW自行车经典赛 2005 德国汉堡公路自行车赛第四名；2006 德国比尔，路克挑战赛第二名；米兰-圣雷莫公路自行车赛获得第二名；2008 意大利圣雷莫公路自行车赛获得第一名；2008 意大利锡耶纳 Monte Paschi Eroica 公路自行车赛获得第一名；瑞士全国锦标赛，在2008 瑞士Messen 获得第一名；2007 瑞士Stettlen 获得第一名；2006 瑞士伯宁根获得第一名；2005 瑞士Hagendorn获得第一名；公路自行车赛 2007 瑞士布鲁格获得第二名；巴黎-鲁贝自行车赛，2006 法国鲁贝获得第一名；2008 法国鲁贝获得第二名；2005 法国鲁贝获得第八名；丹麦邮政自行车赛决赛排名赛 2006 丹麦腓特烈斯贝获得第一名；环佛兰德自行车赛 2006 比利时Meerbeke 公路自行车赛获得第六名；伊特鲁里亚-亚得里亚海自行车赛，2008 意大利圣贝内代托-德尔特龙托获得第一名；在环卢森堡自行车赛，2005 环卢森堡迪基希，获得第二名；环加利福尼亚自行车赛，在2008 美国加利福尼亚帕萨迪纳，获得第四名；2004 希腊雅典个人计时赛获得第十名；奥运会 2008 北京奥运会男子公路个人赛季军。

Since the B-spline is a locally supported function, the smoothing formula can be strictly limited in a neighborhood of each point. The smoothing surface defined by the smoothing formula has the same convexity as that of the original image. Secondly, the edge points are detected by either computing the local extremum points of the directional derivative or computing zero-crossing of the second-order directional derivative of the smoothing surface. Finally, an example of an edge detector is given.

针对反卷积视觉模型的病态性，增加了适当的约束，给出了基于低松弛迭代格式的快速自适应滤波算法，对于一个N×N输入图象，由于变换核的局部支撑性质以及低松弛迭代格式的引入，使得快速自适应滤波算法的计算复杂度降为象素个数N〓的线性量阶N〓，就最小二乘算法的复杂性而言，优于不动点迭代算法的O以及基于FFT的预处理共轭梯度算法的O。

In this thesis, the virtual boundary integral equation is based on double layer potential with the virtual density to be determined on virtual boundary. Since this integral equation related to double layer potential only involves the computation of the normal derivative and second normal derivative of fundamental solution, the exponential integral function is not involved in it, so numerical computation for the exponential integral function is avoid.

本文则基于双层位势，引入虚拟矩密度函数来建立虚边界积分方程，并首先对时间变量进行解析积分，在虚、实边界上采用常单元和等额配点离散，该方程只涉及含基本解的法向导数及其二阶法向导数项的计算，对时间变量进行解析积分后，不会出现对指数积分函数的空间变量的积分计算。

The formula requires not only the function value,but also the first derivative and second derivative value on node.

此类求积公式不但需要结点上的函数值，还需要结点上的一阶和二阶导数值。

In this paper,a space fractional differential equation is considered.The equation is obtained from the advection-diffusion equation by replacing the second order derivative in space by a fractional derivative in space of order.

考虑空间分数阶微分方程(即在一个标准的扩散-对流方程中，用分数阶导数代替空间二阶导数)，给出了该分数阶微分方程的显式和隐式有限差分格式。

The factor of the mixed partial derivative term controls the grid orthogonality. The other two factors of second order partial derivative terms control the grid spacing. The stre...

利用方程系数的这些特性，提出一种 Numman边界条件的给定方法，较好地实现了网格正交和疏密分布的有效控制

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。