查询词典 falling gradient

Conjugate gradient methods are very important for solving nonlinear optimization problems.

共轭梯度法是解决无约束非线性最优化问题的重要的方法之一。

A new kind of algorithm, which is based on Dirac δ-Function, is established by Nonstandard Analysis for M/G/1 queueing system performance gradient estimation with respect to a kind of probability parameter.

新算法在实现过程中需要用样条函数来近似δ函数，但可以同时估计M/G/1排队系统中顾客期望系统时间和忙期期望长度对概率参数的梯度。

Two kinds of DPA estimators are given by way of Nonstandard Analysis andprobability parameter sampling,respectively.One kind of DPA algorithm,based on a sample pathof GI/GI/l system,can estimate simultaneously EST and expected busy period length gradient.

分别从非标准分析和概率参数抽样方式的角度建立了两类DPA估计量，特别地，前一类DPA估计量可以同时估计顾客的期望系统时间和忙期期望长度的梯度。

Since the objective function of the model is nonlinear, the gradient of which is piecewise constant, the normal nonlinear programming algorithm can not be used.

该模型是非线性的且目标函数的梯度是分段常数，不能采用常规的非线性规划算法进行求解。

Across a plane normal to the direction of the concentration gradient, there are fluxes of molecules in both directions.

在一个倾向于浓度梯度方向的平面上，分子同时在两个方向中波动。

This demonstrates that the formation and the growth of the crystal texture in the a-Fe/Nd2Fe14B nanocomposites result from the large temperature gradient normal to the free surface of the ribbons during the process of rapid solidification.

在激冷面各晶面法线方向的尺寸相近，表明纳米晶的形状近似于等轴晶。a-Fe/Nd2Fe14B纳米晶织构的形成和生长受合金薄带在凝固过程中热流梯度的控制。

MicroRNAs primers were arrayed on plates according to the Tm of each primer. PCR were carried out at different annealing temperatures using a gradient real-time PCR instrument. The relative expression level of each microRNAs was calculated using the most stable reference gene as normalizer which was selected by geNorm and Normfinder software.

通过geNorm软件和Normfinder软件分析选择最佳的内参照基因，将每种microRNAs按其引物Tm值排成阵列，用梯度实时PCR仪在不同的退火温度扩增，并计算每种相对于microRNAs内参照基因的表达量。

It is shown from the analysis results that besides the bottom slope gradient, the couple of forces caused by the southward Subei coastal current and the northward or northeastward Zhejiang coastal current and Taiwan warm current is one of main external forces to make the diluted water turn left.

指出 ：除海底坡降外，由 S向的苏北沿岸流和 N，NE向的浙东沿岸流及台湾暖流构成的"力偶"，是使冲淡水向左扭转的重要外力之一。

The northern slope of Changbai Mountain where there is not only a high diversity in vegetation types and species, but also high variation of diversity pattern along the altitude gradient.

不同物种沿海拔梯度的连续或间断分布，不仅反映了环境随海拔的变化规律，同时也反映了物种的生物学、生态学特性、分布状况及对环境的适应性。

The Taichung Domain was moving northwestwards before the 1999 Chi-Chi earthquake: in the footwall of Chelungpu Fault the slip rate was ~10 mm/yr, while in the hanging wall the rate increased eastwards up to 10-30 mm/yr. Two years prior to the earthquake, in the footwall of Changhua Fault the deformation direction changed from WNW to almost due N, and velocity gradient changed from increasing northwards to increasing eastwards, suggesting possible precursor of a large earthquake.

中部地区在集集地震前大致向西北方向位移，车笼埔断层下盘位移速率约在10 mm/yr左右，断层上盘往东侧逐渐增大，在10~30 mm/yr之间；集集地震发生前2年，彰化断层下盘的位移方向由西北西转为偏北的位移型态，位移速度则由南向北增大，转为由西向东增大的趋势；即位移方向与位移速度有明显的改变，可能为地震前兆的相关资讯。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。