A local convergence theorem and five semi-local convergence theorems of the secant method are listed in this paper. For every convergence theorem, a convergence ball is respectively introduced, where the hypothesis co...A local convergence theorem and five semi-local convergence theorems of the secant method are listed in this paper. For every convergence theorem, a convergence ball is respectively introduced, where the hypothesis conditions of the corresponding theorem can be satisfied. Since all of these convergence balls have the same center x^＊, they can be viewed as a homocentric ball. Convergence theorems are sorted by the different sizes of various radii of this homocentric ball, and the sorted sequence represents the degree of weakness on the conditions of convergence theorems.展开更多
The Luming molybdenum deposit is located in Weixing-Anquan area of Heilongjiang Province, where stream sediments are well - developed. This paper introduces the popular statistical method which investigates the relati...The Luming molybdenum deposit is located in Weixing-Anquan area of Heilongjiang Province, where stream sediments are well - developed. This paper introduces the popular statistical method which investigates the relationship between geochemical character - istics of stream sediments and mineralization. Some conclusions have been reached : 1) Mo is most likely to form large deposits;Au may form ore deposits, but the size will not be large;2) Mo and Sb, Cu, Pb, Zn. W belong to the same factor. and Mo has experienced multi-period mineralization;Au. Ag and As belong to the same factor;and 3) the authors chose 4 mineralization prospective areas to study stream sediment anomaly and found a new Mo orebody, which suggests that this area has good oresearch prospects of Mo deposits.展开更多
文摘A local convergence theorem and five semi-local convergence theorems of the secant method are listed in this paper. For every convergence theorem, a convergence ball is respectively introduced, where the hypothesis conditions of the corresponding theorem can be satisfied. Since all of these convergence balls have the same center x^＊, they can be viewed as a homocentric ball. Convergence theorems are sorted by the different sizes of various radii of this homocentric ball, and the sorted sequence represents the degree of weakness on the conditions of convergence theorems.
文摘The Luming molybdenum deposit is located in Weixing-Anquan area of Heilongjiang Province, where stream sediments are well - developed. This paper introduces the popular statistical method which investigates the relationship between geochemical character - istics of stream sediments and mineralization. Some conclusions have been reached : 1) Mo is most likely to form large deposits;Au may form ore deposits, but the size will not be large;2) Mo and Sb, Cu, Pb, Zn. W belong to the same factor. and Mo has experienced multi-period mineralization;Au. Ag and As belong to the same factor;and 3) the authors chose 4 mineralization prospective areas to study stream sediment anomaly and found a new Mo orebody, which suggests that this area has good oresearch prospects of Mo deposits.
