Based on analysis of minimum haulage cost for mining a unit consisting a group of benches, formulas for determining these parameters are deducted.
其中，过渡深度、破碎站移设步距及开拓系统布置是该工艺的关键技术，通过分析组合台阶单位体的开采，以联合运输费用最小为原则推出了确定该参数的公式。
Design of the vacuum suctorial mechanical hands of pneumatic composite platform;
气动组合台真空吸附机械手系统设计
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。