民用飞机预研课题管理研究

分析和阐述了民用飞机预研课题管理的总体过程,具体研究分析了各管理过程要素的具体要求,概述了具有指导性的管理实施流程,为民用飞机预研课题管理水平的提升提供参考。     

盘管对接焊缝射线检测

采用小管径对接焊接接头的γ射线照相技术.按照JB/T4730.2-2005标准规定,根据工件特点和检验要求,选择适当的Se75-射线检验方法.用此种方法透照所要检验的管对接焊缝,用固定板固定射源很方便,只要将所要透照的管对接焊缝接头找出最佳偏移距离,将γ源置于偏移距离处,即可固定射源方便又快捷地进行检验.     

区域物流系统内涵分析

在目前的研究文献中,有关区域物流系统含义的论述尚不多见。从区域经济和系统工程的角度,结合物流本身的含义,试图对区域物流系统的基本内涵、特征及其运行机理进行分析,以求对区域物流系统的规划、建设和调控起到一定的指导作用。     

项目式教学人才培养模式

针对目前我国高职教育人才培养存在的问题及高职教育对人才培养提出的新要求,阐述项目式教学的必要性、优势及项目式教学设计的方法,并通过项目式教学在电子电信专业的教学实践证明项目式教学的有效性。     

航空型号项目风险预测的BP神经网络模型及应用

本研究克服了单纯采用专家风险因子测度方法主观性较强的缺点,以及单纯采用人工神经网络评估模型模糊性的缺点,结合两种方法的优点,利用基于BP神经网络算法的Microsoft Visual C++程序,在专家风险因子测度基础上,通过大量风险评估成功案例数据的训练,成功建立了航空型号项目风险预测模型.该模型可以较为精确、客观地...     

刍议环境投资决策的基本方法

环境管理会计是将环境因素引入管理会计体系的正在形成之中的新兴管理会计学分支.在环境因素逐渐成为影响企业活动的重要因素的背景下,环境管理会计以其适应企业现实的经营状况等优势,日渐受到企业的重视,同时其理论的发展也在不断的完善之中.环境投资决策就是将环境因素引进管理会计之中,在管理会计进行各种决策分析时,通过确认,计量各种由于环境因素所造成的收益与成本,并将其纳入到管理会计分析的模型之中.其中着重介绍了环境投资决策的基本方法,并举实例对环境项目的决策进行分析.     

再论建设项目的投资控制

合理确定建设项目投资控制的目标，做好决策阶段、设计阶段的投资控制以及主动控制各阶段对建设项目的投资控制均具有十分重要的作用，此外，还必须加强技术与经济的相结合，正确处理好二者之间的关系，这样才能切实地将控制项目投资概念渗透到各项工作中去。     

NASA格林研究中心的宇航推进与动力计划

介绍了NASA的宇航推进与动力(AP＆P)计划及其9个子计划。     

The Special Purpose Dexterous Manipulator (SPDM) Systems Engineering Effort – A successful exercise in cheaper,faster and (hopefully) better systems engineering

The Special Purpose Dexterous Manipulator (SPDM) is the latest Space Robot developed by the Canadian Space Agency (CSA) and McDonald Detwiller Space and Advanced Robotics (MD Robotics, previously Spar Aerospace) for the International Space Station (ISS). The SPDM has presented its designers with a number of new challenges in performing the Systems Engineering effort required for a complex robotic system:(1) The SPDM initial design was started and attained various levels of maturity for various components under the Space Station Freedom environment, then the Program was stopped and finally restarted under the harsher environment in which the International Space Station is being built.(2) The SPDM is the first space robot to utilize previously developed and space certified robotic components, as well as components with high-commonality to the previously developed ones (electronics, S/W).(3) New requirements levied by the Customer during the negotiations leading to the Program re-start necessitated significant architectural changes versus the SPDM configuration `frozen' when the Program was shut down.(4) The SPDM is the first robotic system of this complexity that is being built under a Firm Fixed Price contract, with the commonality assumptions as one of the cost drivers.This combination of components of various pedigree, coupled with the constraints imposed by an FFP contract have been addressed by the designers through the definition of a novel approach to integrated Systems and Design Engineering.