spring index

Determination and prediction of flood and drought index for late spring and early summer in Longnan mountain area

陇南山区春末夏初旱涝指数的确定与预测研究

The results showed demersal biological resources in summer were richer than that in spring as well as diversity index of the community.

结果表明，夏季底层生物资源较春季丰富，渔业生物群落的多样性指数也较春季高。

Meanwhile, there were apparently seasonal changes in total of species, index of Shannon-Wiener and index of evenness. The biodiversity and index of evenness were lower in spring and winter than in summer and autumn.

同时，还发现群落的Shannon-Wiener指数和均匀度指数等生物多样性指数的季节性变化明显，春季和冬季的多样性较低，夏季和秋季较高。

The temporal-spatial distribution of drought index D H in late spring and early summer in the eastern Gansu Province is analyzed by EOF.

应用自然正交函数分解（EOF）方法，分析了甘肃省庆阳地区春末夏初干旱的综合评价指数DH的空间分布特征及随时间演变规律；

The grading instrument of balance wheel and hair spring is an important check and sorting equipment in the watches manufacturing industry. Its performance influences mechanical watch core components& the quality index of balance wheel and hairspring.

而游丝摆轮分档仪是钟表生产行业中重要的校验和分拣仪器，它的性能影响着机械钟表核心零件&摆轮和游丝的质量指标，影响着钟表产品的计时精确度和产品质量。

Comparing to the old microtherm standard for cold of the late spring and late frost index, the new standard is much more flexible and practical.

并与旧标准中的倒春寒和晚霜冻指标进行了对比分析。

A deep beam model with spring bearing is given, based on the analysis of middle frame of frame and shear wall structure ground floor. Comparing rigid assumption to elastic assumption, shear error of frame is worked out, which is index of floor rigidity.

从按刚、弹性楼板计算框剪结构的底层中间框架柱剪力误差值的分析入手，建立了一个由弹簧支承的水平深梁的模型。