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Geoglogical conditions are one of the main factors that influence the reserve assets value.Based on their classification and qualititive analysis,the value selection range of the influent coefficient of geological factors is defined and a case calculation of Beiminghe iron deposit is made. 地质条件是影响储量资产价值的主要因素之一 ,在对其分类并定性分析的基础上 ,就地质因素影响系数的取值范围作了界定 ,并结合北 洺河铁矿的情况进行了实例计算。 In situ X ray fluorescence analysis may be subjected to some interference factors, such as matrix effect, humidity and unevenness effect. This paper employs the Intensity Influent Coefficient Method and the Characteristic to Scattering Ratio Coefficient Method for the correction of matrix effect, the Scattering Correction Method for the humidity effect, and Characteristic to Scattering Ratio as the basic parameter for unevenness. All these means have been integrated in a portable multi element... In situ X ray fluorescence analysis may be subjected to some interference factors, such as matrix effect, humidity and unevenness effect. This paper employs the Intensity Influent Coefficient Method and the Characteristic to Scattering Ratio Coefficient Method for the correction of matrix effect, the Scattering Correction Method for the humidity effect, and Characteristic to Scattering Ratio as the basic parameter for unevenness. All these means have been integrated in a portable multi element XRF analyzer. The analyzer and the techniques were successfully applied to determining concentrations of K, Ca, Ti, Mn, Fe, Cu, Zn, Sr, Pb, in rock outcrops and soil of four copper prospecting areas and have been proved to be of high efficiency and low cost. 现场X射线荧光分析的主要影响因素是基体效应、湿度效应和不平度效应等。基于室内、野外大量实验 ,结合软件技术 ,在新一代手提式多元素X荧光仪中 ,综合运用强度影响系数法、特散比及经验系数法 ,使多元素现场X荧光快速分析技术取得实用性进展。地质大调查中 ,在样品多元素快速测试 ,野外土壤、岩石的原位分析 ,异常追索查证等方面的应用 ,充分体现出轻便、快速、高效、低投入的效果 For accounting the effects of low stiffness of sheet metals, the assembly variation was calculated by using finite element method and pseudo random numbers. Consequently, it is indicated that the method presented here has the same accuracy as the method of influent coefficient, and it can account for the effects of elastic and plastic deformable because of independent of stiffness matrix. Furthermore, it is simple and practical compared with the Monte Carlo method, and the calculation amount of random... For accounting the effects of low stiffness of sheet metals, the assembly variation was calculated by using finite element method and pseudo random numbers. Consequently, it is indicated that the method presented here has the same accuracy as the method of influent coefficient, and it can account for the effects of elastic and plastic deformable because of independent of stiffness matrix. Furthermore, it is simple and practical compared with the Monte Carlo method, and the calculation amount of random numbers can be decreased to 1/15 of later. 针对金属薄壁件刚性小、易变形等特点,提出了基于伪随机点和有限元方法对薄壁件的装配公差进行计算的方法。计算过程中,利用基于数论方法所产生的少量伪随机点代替随机点。算例结果表明,与影响系数法相比,计算精度基本相同。由于计算过程中不需要单独计算刚度矩阵,因此利用该方法可以同时考虑零件装配过程中的弹塑性变形。该方法与Monte Carlo法计算精度基本一致,而计算量仅为Monte Carlo法的1/15。
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