The combination resonance of a simple supported beam under two excitation forces was studied.
建立了梁振动的Duffing方程,采用经典的L-P法对其进行求解,分析了强迫振动的组合谐波共振的成因、类型和特点。
The approximate solution of the associated harmonic response of the relative rotation nonlinear non-autonomous system under two forcing excitations of different frequencies is obtained by the method of perturbation.
应用摄动法求得相对转动非线性非自治系统在两种不同频率谐波共同激励下的组合谐波响应的近似解。
3-layer combination casing strength analysis and calculation;
三层组合套管强度分析与计算
Progress of combination photocatalytic oxidation in wastewater treatment;
组合光催化技术在水处理中的应用
A new injection profile combination logging tool and its application;
一种新型注入剖面组合测井仪及其应用
Resolving Problems of Permutations and Combinations with Generation Function;
利用母函数求解排列组合问题
Analysis on Applied Effects of Different Forage Combinations Used in Rabbit Production;
不同牧草组合在肉兔生产中应用效果的分析
By crossing 8 hybrid rice sterile lines with 12 early hybrid rice restorer lines(cultivars) through incomplete diallel cross(NC Ⅱ)desig n,96 combinations of early hybrid rice were obtained.
采用8个杂交稻不育系和12个杂交早稻恢复系(品种),通过不完全双列杂交,配制了96个不同杂交早稻组合,研究了杂交早稻亲本及所配杂交早稻组合12个米质性状的配合力效应。
Theoretic Mode and Positive Analysis of Technological Innovation Portfolio;
组合技术创新的理论模式与实证研究
This paper presents the modern portfolio theory and related math model, modifies the benefit and risk function from oil production plant portfolio model: the net present value instead of yield rate is as the measurement of yield function; the absolute deviation instead of variance is as the measurement of risk function.
简要概述了现代投资组合理论及其数学模型;修正了采油厂投资组合模型的收益和风险函数,以净现值代替收益率作为收益函数的度量,以绝对偏差代替方差作为风险函数的度量;结合采油厂投资管理特点及约束要求,建立了均值-半绝对偏差投资组合优化模型。
The modern investment portfolio theory and its evolvement model which are based on β value are introduced.
介绍了基于β值的现代投资组合理论及其演变模型,阐述了目前在我国证券市场上,由于交易费用不均、信息获取不对称等情况的存在,使得具有不同资金规模的投资者处于不同的风险水平。