以水培法莴苣幼苗为供试材料 ,研究了不同氮素形态对营养液的 p H及磷、锌、铁之间的相互作用机理。结果表明 :氮素形态可以改变营养液的 p H,在以 NO-3 - N为氮源时 ,营养液
In order to reduce the multiplexing interference and enhance the information data transmission efficiency of the common spread-spectrum telemetry commtmication
A hybrid approach for fuzzy system design based on clustering and a kind of neurofuzzy networks is proposed. An unsupervised clustering technique is firstly use
The problem of variable sampling time interval which appears in application of Kalman Filtering is analyzed and the corresponding filtering process with or with
Three forecasting models are set up: the auto-regressive moving average model, the grey forecasting model for the rate of qualified products Pt, and the grey fo
Ants of artificial colony are able to generate good solutions to the famous traveling salesman problem (TSP).We propose an artificial ants algorithm for solving
<正> 全党重视统战工作,是搞好统战工作的根本保证。认真总结建国以来全党重视统战工作的经验,分析轻视、忽视统战工作的主要现象及成因,对于在新形势下进一步发展全党重视统
例题已知方程组{a-2b-3c=4,5a+6b+7c=8,则9a-2b-5c=___. 分析:这个方程组有三个未知数,两个方程,一般情况下,不易求出每个未知数具体的解,但我们可以从不同角度来分析,现
事件发生的可能性及其大小与人们的生活和生产密切相关．在今后的概率学习中几乎所有问题都会涉及．准确认识事件发生的可能性及其可能性的大小是学好辐率的一个十分重要的起点．下