自从国际海事组织的目标型船舶建造标准(goal based standard,GBS)方法论被成功应用于国际船级社协会的油船和散货船船体结构规范以来,GBS方法论已逐渐推广至各海事领域和所有海船船型的规范编制中。该文综述了GBS方法论在国内外海船规...自从国际海事组织的目标型船舶建造标准(goal based standard,GBS)方法论被成功应用于国际船级社协会的油船和散货船船体结构规范以来,GBS方法论已逐渐推广至各海事领域和所有海船船型的规范编制中。该文综述了GBS方法论在国内外海船规范研究中的发展动态,深入剖析了GBS船体结构规范的技术特性,并据此提出了中国船级社海船船体结构规范体系采纳GBS方法的框架方案。展开更多
In the paper, necessary and sufficient conditions are provided for a function involving the divided difference of two psi functions to be completely monotonic. Consequently, a class of inequalities for sums are presen...In the paper, necessary and sufficient conditions are provided for a function involving the divided difference of two psi functions to be completely monotonic. Consequently, a class of inequalities for sums are presented, the logarithmically complete monotonicity of a function involving the ratio of two gamma functions are derived, and two double inequalities for bounding the ratio of two gamma functions are discovered.展开更多
文摘自从国际海事组织的目标型船舶建造标准(goal based standard,GBS)方法论被成功应用于国际船级社协会的油船和散货船船体结构规范以来,GBS方法论已逐渐推广至各海事领域和所有海船船型的规范编制中。该文综述了GBS方法论在国内外海船规范研究中的发展动态,深入剖析了GBS船体结构规范的技术特性,并据此提出了中国船级社海船船体结构规范体系采纳GBS方法的框架方案。
基金supported partially by the China Scholarship Council and the Science Foundation of Tianjin Polytechnic Universitysupported in part by the Natural Science Foundation Project of Chongqing,China(Grant No.CSTC2011JJA00024)+1 种基金the Research Project of Science and Technology of Chongqing Education Commission,China(Grant No.KJ120625)the Fund of Chongqing Normal University,China(Grant Nos.10XLR017 and 2011XLZ07)
文摘In the paper, necessary and sufficient conditions are provided for a function involving the divided difference of two psi functions to be completely monotonic. Consequently, a class of inequalities for sums are presented, the logarithmically complete monotonicity of a function involving the ratio of two gamma functions are derived, and two double inequalities for bounding the ratio of two gamma functions are discovered.
