共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
3.
4.
针对舰船基地级修理文件编制规律与技术特点,提出了成系统、科学的基地级修理文件编制六维度管理方法。在分析舰船装备基地级修理文件国外编制现状的基础上,针对修理文件编制难度大、内容多、涉及外协单位多、质量和进度管理难度大的特点,梳理出基地级修理文件体系,提出了从要求、样例、维修分析、知识库、质量管理、进度管理六个维度对修理文件编制的质量和进度进行管理的创新方法,从工程可操作性上对修理文件的编制管理方法进行了阐述,其研究成果对落实舰船装备基地级修理文件编制工作具有重要意义。 相似文献
5.
6.
针对舰船装备保障这一复杂巨系统工程管理实际,结合保障能力建设综合性、系统性、复杂性等特点,研究了舰船装备保障目标确定及分解方法,分析了军民融合式保障发展规律和需求,提出了基于装备通用化程度、技术含量、使用频率和保障风险的保障分工决策模型,研究了按体系构建保障能力的管理框架与建设路线。工程实践表明,该方法能够满足新形势对舰船装备保障的要求,有效提高舰船装备保障工程质量和效益,持续保持舰船装备战备完好性水平,实现复杂巨系统工程管理的科学化和规范化。 相似文献
7.
舰船装备材料体系发展与需求分析 总被引:1,自引:0,他引:1
舰船材料由研发到应用周期漫长、流程众多,其发展水平是衡量一个国家工业实力的重要指标,是维系舰船服役安全性和技战术水平的重要因素,"材料先行"和"材料体系构建"也是各海洋强国普遍重视的基本理念。随着舰船装备建设的跨越式发展需要,舰船材料整体技术水平和行业管理能力与新时期的要求还存在一定差距。为弥补这一差距,及时跟进舰船材料的国际前沿领域,有力推进我国在该领域的技术研发水平,对国内外舰船装备材料的发展现状进行了系统描述,详细分析了我国舰船材料体系发展中存在的问题,提出了当前及未来我国舰船装备材料体系的研究重点和发展目标,以及舰船装备发展趋势对先进材料的现实迫切需求、共性长期需求以及潜在需求等。最后,针对舰船装备材料体系的发展,提出了相关建议和措施。 相似文献
8.
9.
运用DEA方法对舰船装备修理规划方案的有效性进行了分析,对非有效单元的改进途径进行了探讨,为舰船修理规划的制定提供了科学依据。 相似文献
10.
11.
A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling. 相似文献
12.
Liebert A Wabnitz H Grosenick D Möller M Macdonald R Rinneberg H 《Applied optics》2003,42(28):5785-5792
A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue. 相似文献
13.
14.
15.
O'Brien RS 《Radiation protection dosimetry》2003,105(1-4):95-100
Australia has several uranium mines and a large number of mineral sand mines, with associated processing facilities. Exposures resulting from these mining and processing operations usually involve intakes of mixtures of radionuclides. This work describes the development of a suite of first order, linear compartment models, based on the ICRP Publication 66 respiratory tract model, and an analytical solution to the decay equations, for assessing the consequences of such intakes. The computer programs based on these models directly compute excretion, organ retention and organ and whole-body doses for intakes of either single radionuclides or any mixture of radionuclides belonging to the same radioactive decay chain. The intake can be via inhalation, ingestion or injection, and can be acute, chronic or of limited duration. The starting concentration and degree of secular (dis)equilibrium can be specified for each radionuclide. No assumptions need to be made about the relative magnitudes of the radioactive half-lives of the different nuclides. 相似文献
16.
Conventional methods for summation of direct measurement errors are considered. Conditions under which these methods provide consistent results are stated. It is proposed to utilize for characteristic of the total error, its interval estimator or the half-sum of the value obtained by adding up its arithmetic and geometric random errors.Translated from Izmeritel'naya Tekhnika, No. 4, pp. 10–12, April, 1995. 相似文献
17.
本文根据多年的实践检定经验 ,参照JJF1 0 59- 1 999《测量不确定度评定与表示》以及《测量不确定度表达 1 0讲》 ,对卧式金属罐容量的测量结果不确定度进行了评定。 相似文献
18.
19.
20.
由于空压机进气侧轴承箱蜗壳温度探头密封效果不好,使空压机及其后续管道受到油污染。后将温度探头的O形圈密封改为骨架油封,杜绝了轴承箱漏油问题。文章简介空压机的结构和技术参数,详细介绍了骨架油封的制作和优点。 相似文献