替代分布

中国北方六种沙蒿亲缘关系、替代分布规律与成因的研究

Studies on Kinships , Geographical Replacement Law and Reasons of the Six Sand Plants of Artemisia in Northern China

近缘的3种锦鸡儿的地带性分布从东至西或从北向南形成明显的有规律的地理替代分布格局。

The zonal distribution of above 3 kindred plants of Caragana forms a obviously geographic substituted distribution from east to west or from north to south .

文中提出状态条件转移和状态转移组合等新概念，以及提出集中参数替代分布参数反求等方法。

Some new concepts such as the state conditional transition and the state transition combination and some methods such as the inverse-solution of replacing the distribution parameter with the lumped one , etc. are presented in this paper .

给出了齿廓干涉N点的解法，明确了理论与实际廓线压力角α的区别，讨论了准圆弧替代误差分布的类型。

It submitted the solution for the contour interfering in point N , defined the difference of the pressure angle α between theoretical profile and active profile , and discussed the type of error distribution of quasi circularity substitution .

还研究高斯光束在外加空间调制电场的光折变晶体中的演化，提出了用空间离散分布电场替代线性分布电场。

The evolution of the Gaussian beam in the photorefractive crystal biased space-modulation electric field is also researched . The step field can substitute for linear one .

分析了湿度与虚温订正值的关系、湿度对射击诸元精度的影响和用统一温度替代湿度空间实际分布的问题。

Relation between virtual temperature correction and humidity , influence of humidity on accuracy firing data , and problem of using identical relative humidity to substituted real humidity distribution are analyzed .

它们的分布区具有明显的区域性，在空间上相互替代，成为地理替代分布种。

Their distributions have remarkable regional characteristics and replace each other in space , and thus become geographical replacement species .

通过推导，得到了养老金给付现值的近似替代变量，采用MonteCarlo仿真的方法，得到了养老金给付现值及其近似替代变量的经验分布。

The approximate random variable of the present value of the pension benefits is defined through derivation and the Monte Carlo method is used to get the empirical distributions of these two random variables .