field check

In view of the defects of low sensitivity, poor detection limits, small number of determined elements and poor ability of matrix effect correction of the current field portable X ray fluorescence (XRF) analyzer, research work on key units of excitation source, detector, measurement circuit and microcomputerization was carried out.

研制了微型低功率Ｘ射线管激发源；研制了低功耗１０２４道分析器，将其与高分辨率半导体探测器配合，实现了高分辨率Ｘ射线荧光探测；研究和实现了以笔记本式微型计算机系统为核心的微机化；在此基础上，构成了野外高灵敏度Ｘ射线荧光测量系统。

This paper analyzed the necessity of reforming about teaching methods of practice, through studying the contents and methods of the practical fieldwork in the field of non-major surveying.

本文通过对非专业测量学野外实践教学的内容、方法的研究,提出了实践教学改革的必要性,认为要根据专业特点安排实习内容,并完善实习基地建设,达到学以致用的目的。

There is no mercy and pity,only wisdom and strength in the field survive.

在野外生存中没有怜悯,没有慈悲,只有智慧和坚强。

Technology of Separating Strains of Macrofungi from Outdoors;

野外分离大型真菌菌种技术

Rationality analysis of field test method for evaluation of geological condition of deposit;

矿床水文地质野外试验方法的合理性分析

in the paper, following an example of the pebble river bed,the determination of the incipient velocities of nonuniform sands is represented,the effect of the shapes (kurtosis)of pebbles on the incipient velocities is analysed,and then,the field test results on the incipient motion law of nonuniform sands are introduced and compared with those of the theoretical analysis.

分析了卵石形状（扁度）对起动流速的影响，介绍了非均匀卵石起动规律的野外试验结果及其与理论的对比。

Based on the chief drawbacks of present field test methods for hydrodynamic dispersion coefficient, an improvement for the slug injection test in radial flow and a hydrodynamic dispersion test in two-dimen-sional flow are presented.

针对现有弥散系数野外试验方法存在的缺点,提出了一种改进的径向流瞬时注入弥散试验和一种二维流场弥散试验的方法。

Experimental study of cross-well seismic field acquisition methodology;

井间地震野外采集方法试验研究

In field acquisition, the aims of acquiring detailed near surface information are to determine the near surface structure, select favorable exciting and receiving lithology, understand the law of seismic wave propagation in near surface, and provide necessary information for data processing methods such as statics and surface consistency.

在野外采集阶段,获取详细的近地表信息的目的是了解表层结构,选择有利的激发、接收岩性,认识地震波在表层的传播规律,为室内静校正、地表一致性等处理提供参考资料。