大孔吸附树脂对葡萄籽原花青素的吸附研究

对8种大孔吸附树脂对葡萄籽原花青素的吸附洗脱性能进行了筛选实验，并选择其中几种树脂研究其对葡萄籽原花青素的吸附特性及机理，发现NKA树脂是比较好的吸附剂。     

函数最小值问题的三个解析几何背景

求函数y=3/cosx＋2/sinx（0〈x〈π/2）（＊）的最小值的方法已有不少人撰文论及，但基本上都是从“数”的角度来研究的，本文从“形”入手挖掘该问题的解析几何意义，给出问题的三个解析几何背景，以飨读者．     

向量的闭合回路在问题解决中的巧妙运用

所谓“向量的闭合回路”就是向量从一点出发,通过一个封闭的图形又回到原点的那个通路．显然,n个向量构成闭合回路的条件是相邻两个向量都必须首尾相接,     

Design of data acquisition system and algorithm research for omnidirectional gamma-ray positioning equipment

This article introduces the design and performance of the data acquisition system used in an omnidirectional gamma-ray positioning system, along with a new method used in this system to obtain the position of radiation sources in a large field. This data acquisition system has various built-in interfaces collecting, in real time, information from the radiation detector, the video camera and the GPS positioning module. Experiments show that the data acquisition system is capable of carrying out the proposed quantitative analysis to derive the position of radioactive sources, which also satisfies the requirements of high stability and reliability.     

剖析命题修正结论完善简解

文[1]给出了如下命题:命题如果x＞0时,f(x),g(x)连续可导,且limx→0f(x)=limx→0g(x),则当x≥0(或x＞0)时,若f(x)≥g(x)恒成立,那么f′(x)≥g′(x)恒成立.并利用该命题简解了一类高考压轴题:“对(A)x≥0,f(x)≥g(x)或f(x)≤g(x)恒成立,其中f(x)或g(x)含参数a,试确定参数a的取值范围.”简解的思路是:对(A)x≥0,只要对f(x)≥g(x)或f(x)≤g(x)两边取导数,再从f′(x)≥g′(x)或f′(x)≤g'(x)中分离出参数a,转化为最值问题.