1. The detector system of the two-axis neutron powder diffractometer at the Heavy Water Research Reactor of China Institute of Atomic Energy was improved by increasing the number of detectors from one to four and by installing the third Soller collimators with horizontal divergence of 20''.
    通过将探测器的数目由1个增加到4个、用水平发散角为20''的Soller准直器取代30''的单缝准直器，对中国原子能科学研究院重水研究堆旁的二轴中子粉末衍射谱仪进行了改进。

2. A number of measures including the selection of matrix modifier and graphite tube, optimization of the charring and atomization parameters and matrix matching have been taken to overcome the negative interference exerted by high concentration of calcium on lead in the determination of trace lead in high-calcium nutrient supplement by graphite furnace atomic absorption spectrometry.
    实验结果表明：使用5%NH4H2PO4作为基体改进剂，普通石墨管，选择灰化温度1 000℃并保持30 s，原子化温度1 400℃并保持3 s，使用标准加入法使标准系列与样品基体相匹配，钙的干扰大大降低，同时高钙营养强化剂样品铅测定的回收率达到92%。

3. A series of nanometer TiO_2 photocatalysts doped respectively by elements with atomic number from 23 to 30 were prepared.
    以沉淀法制备得到了第一过渡系23至30号元素(V，Cr，Mn，Fe，Co，Ni，Cu，Zn)分别掺杂的纳米TiO_2光催化剂。

4. The program is applicable to all elements in the atomic number range from5 o 92 and has the capability to deal with 12 elements and 30 measuringpoints each time.
    处理程序把MS-46电子探针输出的原始数据进行死时间和背景修正，得到强度比K，修正程序则把强度比K进行ZAF修正得到真实成分。