comination headlamp是什么意思

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用法例句

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。

The influence to the diversion tunnel wall stability with joints composition of type Ⅱ-Ⅲ surrounding rock of the diversion tunnel of Baise multi-purpose dam project;

百色水利枢纽导流洞Ⅱ～Ⅲ类围岩节理组合对洞壁稳定的影响

Research on the hight composition of narrowhigh type tail pipe;

窄高型尾水管的高度组合研究

Study on composition of Web service based on distributed awareness;

基于分布感知的Web服务组合方法研究

Capacities of Headed Stud Shear Connectors in Composite Steel Beams with Precast Hollowcore Slabs;

对组合钢梁-预制空心板中栓钉连接件的性能分析

Effects of the Diaphragm at Midspan on Static and Dynamic Behaviour of Composite Railway Bridge:A Case Study;

中跨横隔板对组合铁路桥梁静力和动力特性的影响(案例分析)

Flood and composite frequence caculation of the topical cyclone storm tide;

洪水与热带气旋暴潮组合频率计算