常数

With the increasing of metal wire radius, the group velocity and attenuation amplitude decrease.

采用高介电常数的金属可提高金属丝波导的传输性能。

In this work ,a series of theortical methods were employed to study the Conformation of cyclic guanosine 3\',5\' monophosphate in solution and stability constants of aluminium and copper complexes , and the binding mode of PDE4B with cAMP.

本文运用一系列的理论化学方法研究了鸟苷-3\'，5\'-单磷酸酯在溶液中的构象情况，铝铜络合物稳定常数和PDE4与cAMP的结合模式。

Given to guide the use of the word Known residence time distribution and the first order reaction rate constant, non-ideal flow reactor (non-ideal flow reactor) will be able to determine the characteristics of the decision.

利用given为引导词）已知停留时间分布和一级反应的速度常数，则非理想流动反应器（non-ideal flow reactor）的特性就能确定的决定。

The binding enthalpy change, the binding molar ratio and the binding equilibrium constant of harmine with hexamer are obtained.

而对d〓与潜在的抗肿瘤药物骆驼蓬碱的相互作用研究，已得到harmine与d〓结合的摩尔结合焓变，结合常数与结合摩尔比。

Dissociation energy, harmonic frequency and force constant are calculated.

同时还计算了Cu2Te分子基态的离解能、力常数和振动频率。

Using Density Function Theory we receive the ground states of GaN and GaN2 are X 、X2B2 respectively.Murrell-Sorbie analytical potential energy functions of GaN have been derived by using ab initio data and the least-square fitting method, and harmonic frequency, force constant and spectroscopic data also have been calculated.

基于量子化学计算得出GaN和GaN2 基电子态及其离解极限之后，利用计算数据和最小二乘法得到了GaN 的M-S解析势能函数，并计算出各态的谐振频率、力常数和光谱数据。

A quick and correct forecast of tidal current when oil spill occurs is a key step in the forecast of oil spill. Based on the harmonic constant of tidal component of M2, S2, O1 and K1 in Lingshan Island, Laoshantou and Chaolian Island, and by using harmonic method, the thesis first conducts a current forecast in a single point, and then builds up a current field forecast in Jiaozhou Bay and its adjacent seas. The computed results match well with the actual situation. The method reduces greatly the time of real time current forecast by not using numerical stimulation, so it fit to the two requirements of quickness and correctness in oil spill forecast system.

迅速准确地预测出溢油发生时的潮流情况是溢油环境预测的根本保证，因此文中根据灵山岛、崂山头和朝连岛三处M2、S2，、O1和K1四个主要分潮的调和常数资料，采用调和的方法进行单点的潮流预报，进而建立了胶州湾及邻近海域的预报潮流场；该方法的潮流预报结果与实际情况吻合良好，且因避开了数值计算过程而大大减少了流场实时预报的机时，符合溢油应急预报系统所要求的准确与快速。

The vertical diffusivity coefficient of the South China Sea is studied by the adjoint data assimilation method in this thesis. The satellite data SST and the harmonic constant of M2, S2, Kb 0, extracted from TOPEX/POSEIDON satellite altimeter are used in data assimilation. So the average of the vertical diffusivity coefficients of the South China Sea in the thermocline in January, April, July, October, 1997 are2.2 10-4/m2s-1, 7.8 10-5m2s-1 , 1.0 10-4m2s-1 , 1.0 10-4m2s-1 respectively.

本文是用伴随同化的方法研究南中国海垂直混合系数，将卫星观测SST数据和从TOPEX/POSEIDON卫星高度计提取的M_2，S_2，K_1，O_1分潮调和常数作为同化资料，得出1997年1、4、7、10月份的南中国海在温跃层处的垂直混合系数，它们的平均值分别是2.2×10~(-4)m~2s~(-1)， 7.8×10~(-5)m~2s~(-1)，1.0×10~(-4)m~2s~(-1)，1.0×10~(-4)m~2s~(-1)。

Next, define the constant elements hij of the n×n hessian matrix H.

其次，定义n×n海赛矩阵H的常数元数为hij。

From the results it is found that the high-frequency fall-off constants for small and large earthquakes are different.

我们注意到小震和大震的高频衰减常数是不同的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。