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Only two papers known to the author discussed the possible relationship between the estimates of Km and Vmax. Colquhoun (196 9) found a strong positive correlation between these estimates in a simulation study. Subsequently, Oliver (1970) examined this relationship by the asymptotic variance-covariance matrices. These simulation and mathematical analyses were based on the assumption that the substrate concentration is error-free, with the error confined to the reaction velocity. In addition, their work was confined to the several estimation methods.

就作者所知,在本研究发表之前仅有两篇文章讨论过估计值之间的相关性。1969年,Colquhoun通过计算机仿真,发现了估计值之间存在正相关关系,1970年,Oliver用渐近方差-协方差矩阵检验了这一点,但是他们的发现有很大的局限性,其一是限于仅反应速度的测量值有误差这一种情况,其二是限于某几种估计方法。

This thesis has mainly contributed two results in theory: one is that the covariance matrix is not positive definitive if the number of sampling is least than the number of variables, the other is that the covariance matrix of discrete sample is positive definitive if and only if the sum of every random column vector of data matrix is non I-linear combination.

本论文在理论上,主要得出两个新的结果:ⅰ抽样调查中,若样本的个数少于变量的个数则样本协方差矩阵恒为非正定;ⅱ离散型样本协方差矩阵正定的充要条件是样本资料阵的各随机列向量是非I-线性组合。

Based on the principle of Otsu method with maximum variance between threshold algorithm of image segmentation, an improved method derived from Otsu algorithm is put forward, which combines interclass distance with intraclass distance, a partial recursive algorithm is used to search optimum threshold.

基于最大类间方差阈值图像分割算法的基本原理,然后结合目标与背景两类之间间距和类内距离对图像分割效果的影响,提出了一种改进的最大类间方差法,运用递归思想局部搜索图像的最佳阈值。

First, we designed to determine the optimum ultrasound-setting, such as power level and ultrasound frequency, to achieve the optimum number of ruptures in the spinotrapezius muscles by intravital microscopy.

我们设计了应用活体荧光显微镜,测量不同条件超声介导微泡破坏作用后鼠脊斜方肌血管破裂口的数量和荧光脂质体微泡的弥散面积,确定最佳超声发射参数;然后,在慢性鼠脊斜方肌模型上,测量荧光标记蛋白的荧光强度和血管密度,对比两种血管内VEGF基因载体系统经超声介导微泡破坏作用后定向转基因表达的效果。

The mantle metasomatism in western Shandong could be subdivided into two stages, i.e. early metasomatic event with interstitial phlogopite and late metasomatic event with orthopyroxene vein or orthopyroxene+phlogopite vein.

鲁西区地幔交代作用应有两期,即早期的填隙型金云母和晚期的斜方辉石脉或斜方辉石+金云母脉体的形成,早期交代介质为富含CO〓和H〓O的熔体,晚期交代介质为富硅质的熔体。

Inscribed polygons are used to approximate a circle, and the number of line segments compose the polygon is detemined by the radius and its image of a circle. Calculation of rotation angles between circle and world coordinate systems with normal vector of circles is also discussed. The proposed approach is tested with several real image data, and results are very satisfying.

讨论了利用空间圆所在平面的法向向量计算空间圆局部坐标系相对于物方坐标系的两个旋转角的方法,系统论述了基于物方直接解和直线段最小二乘模板匹配方法进行空间圆匹配与重建的数学模型,并利用实际图像数据进行了重建实验,取得了较好的重建结果。

As a result, the mass matrix, the stiffness matrix, the damping matrix and the excitation coefficient matrices of the dynamics differential equations are random parameter matrices. According to the minimum deviation rule of the mean squares between the random parameter system and the deterministic parameter system, the random mean square deviation vector function between the two systems has been set up and the deterministic parameter system has been solved.

应用Newton-Euler矢量法对挂接车辆系统建立了质量阵、刚度阵、阻尼阵和激励系数阵皆为随机参数阵的八自由度随机参数系统动力学微分方程,并按照随机参数系统与确定性参数系统之间的均方值偏差最小的原则,建立了两系统之间的随机均方偏差矢量函数,由此解出了相应的确定性参数系统

So, with the principle of lowest general energy-consumption for completing observation task, we figure out a kind of greedy heuristic algorithm, testify its convergence, and give its searching supremum and time complexity.

该策略主要思想是结合投标方卫星以往完成观测任务的历史记录,对卫星进行筛选招标,以减轻网络负载和通信量;投标过程中,引入后移空余时间概念,从时间约束和能源约束两个方面来判断投标方卫星是否有"能力"来完成招标的观测任务,并给出相应时间约束和能源约束的检验算法,分析了算法的时间复杂度;评标过程中,基于集覆盖的概念,将任务分配问题转化为集覆盖问题。

The Christmas season gave Hillary and me the chance to see Chelsea perform twice: in The Nutcracker with the Washington Ballet Company, where she went for class every day after school, and in a Christmas skit at the church we had chosen, Foundry United Methodist, on Sixteenth Street, not far from the White House.

圣诞节期间,我和希拉里有机会两次观看切尔西的表演:和华盛顿芭蕾舞团一起演出《胡桃夹子》,在方德里联合卫理公会教堂的一个圣诞幽默短剧中演出。切尔西每天放学后都到华盛顿芭蕾舞团去上课。方德里联合卫理公会教堂是我们选择礼拜的教堂,位于第16大街,距离白宫不远。

The simplest example is when the sender (whom cryptographers usually call Alice) dispatches a stream of them to the receiver. These photons will have one of two modes.

举个最简单的例子,当发送方将一束光子流传送给接受方,必须从两种模式中的选取一种对其中的光子进行编码(译码者通常称发送方为爱丽丝,接受方为鲍勃)。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。