论文部分内容阅读
以罗非鱼越冬鱼塘2003年12月～2004年4月连续监测资料为基础,运用多元线性回归方法,以水温等6项环境因子和放养密度对罗非鱼成活率作回归统计,建立多元回归方程,初步建立罗非鱼越冬成活率的预报模型.结果表明,pH、氨氮浓度、BOD5浓度和放养密度是罗非鱼成活率的显著相关因子.
罗非鱼越冬成活率多元线性回归分析
【摘 要】
：
以罗非鱼越冬鱼塘2003年12月～2004年4月连续监测资料为基础,运用多元线性回归方法,以水温等6项环境因子和放养密度对罗非鱼成活率作回归统计,建立多元回归方程,初步建立罗非鱼
【机 构】
：
丽水学院,上海水产大学
【出 处】
：
淡水渔业
【发表日期】
：
2004年期
其他文献
首先分析总结理想情况下雷达方程及其相应参数的求取,研究了有源干扰方程、无源干扰方程、接收机噪声方程及其参数的求取,详细推导了频谱系数.在此基础上,给出复杂电磁环境下
Nickel-based composite coatings reinforced by in situ synthesized TiB2 and WC particles were deposited on stainless steel by laser cladding,and their microstruc
根据不同时期的Landsat TM卫星遥感图像,分别提取海南坡鹿Cervus eldi hainanus栖息地海南大田国家级自然保护区及周边地区的归一化植被指数(Normalized Difference Vegetati
In order to improve reliability of the excavators hydraulic system, a fault detection approach based on dynamic principal component analysis(PCA) was proposed.
A novel robust fault diagnosis scheme,which possesses fault estimate capability as well as fault diagnosis property,is proposed.The scheme is developed based on
以汉江流域为研究区,在GIS技术支持下,应用分布式模型SWAT(Soil and Water Assessment Tool)进行了流域产水产沙模拟.采用1987-1996年的资料进行模型率定,1997-2001年的资料
Influence of current density on nano-Al2O3/Ni+Co bionic gradient composite coatings by electrodeposi
Metal and nano-ceramic nanocomposite coatings were prepared on the gray cast iron surface by the electredeposition method. The Ni-Co was used as the metal matri
Narrow-band interference suppression in Time-Division-Duplex CDMA systems using preprocessing techni
This letter presents two preprocessing techniques for narrow-band interference (NBI) rejection in Time-Division-Duplex (TDD) CDMA systems.In the proposed method
目的 观察四肢双侧训练对半侧颈髓损伤致偏瘫病人的功能恢复效果.方法 将80例半侧颈髓损伤致偏瘫病人,手术后随机分为观察组和对照组,各40例,对照组进行药物治疗和常规的患肢
Surface nanostructure formation mechanism of 45 steel induced by supersonic fine particles pombardin
By means of supersonic fine particles bombarding (SFPB), a nanostruetured surface layer up to 15 μm was fabricated on a 45 steel plate with ferrite and pearlit