Study on 2-D finite difference method on the center of either high anomaly radon fields in view of the character of radon field over sandstone-type uranium provide an algorithm for further research.
针对砂岩型铀矿体上氡气场低值区对应矿体而高值异常场对应矿体两端的特点，以矿体端点高值异常峰值点为中心进行二维等步长剖分，得出差分方程，为问题的进一步研究提供一种算法思路。
D-glucosamine has biological activity. The progress in study and application of D-glucosamine derivatives in the field of biology and medicine was reviewed in this paper.
氨基葡萄糖具有一定的生物活性，对其进行化学修饰后可广泛应用于生物医药领域。
With 312-d optimized saturation design, field experiment was conducted to study yield effect of water and fertilizer coupling on spring maize.
采用312 - D最优饱和设计，开展了春玉米水肥耦合作用田间试验研究。
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