Helen Equation

Analysis and Preventing Measures for Flood and Drought Disasters in Hailun City;

海伦市水旱灾害分析及防治对策

PS123 crop growth model based method to calculate potential maize productivity in Hailun, Heilongjiang;

基于PS123作物生长模型的黑龙江海伦市玉米生产潜力计算

The Study of Airborne Pollen and Spores in Hailun of Northeast China Plain;

东北平原海伦空气孢粉分析

A method for calculating potential productivity of main crops in dry farming system as well as assessment of agricultural resources utilization in temperate zone,Northeast China: A case study of Hailun County,Heilongjiang Province;

东北温带旱作农业主要作物生产潜力及资源利用效率评价——以黑龙江海伦市为例

This paper estimated the main crops potential productivity in Hailun County,and established agricultural resources utilization assessment which is composed of productivity loss value,contented index and yield potential index based on the productivity of different level.

本文对海伦地区的主要粮食生产潜力进行估算;并选取产量衰减量、资源满足率和资源增产潜力三个指标评价了农业资源的利用效率。

Hilda Doolittle:Rewriting Myth of Helen;

杜利特尔(H.D.):重塑海伦形象

History and Elucidation: Researd of Helen;

历史与阐释——海伦形象再探

Helen by Euripides——What a man should Be;

欧里庇得斯笔下的海伦——人应该有的样子

Based on the agriculture statistical data from 1978 to 2005 in Hailun County,the agricultural development process and factors are analyzed by using the linear regression,the gray system analysis and principal component analysis method.

采用线性回归、主成分分析和灰色关联对1978~2005年海伦市粮食产量及其影响因素进行了分析,以确定粮食产量在时序上的波动特征以及引起波动的主要影响因素。