资源约束下的生产批量分析

在满足生产数量及周期的前提下,以产品切换最少为优化目标,综合考虑产能、生产周期、故障时间、工位器具等因素,研究生产批量的计划问题。通过数学模型的建立,运用非线性规划的方法:,求解在资源约束条件下最优的生产批量。理论计算分析与实际生产很大程度上的一致性,揭示了生产运作中的规律性,探索并掌握这些规律对生产有着重要的指导意义。     

平台分离器常用控制方案选择

概述平台分离器的压力和液位控制方案,并根据具体项目给出实例。在前期设计中,须进行仔细分析,保证流程的设计能满足产品质量和流程稳定性的要求,这对于促进项目的成功具有重要的意义。压力、液位是工艺控制的基础。整个流程是建立在单个设备工艺参数控制的基础之上的。通过整合各设备之间的流程关系,优化工艺流程,可以在很大程度上降低系统能耗,保证整个系统平稳运行。     

半潜式生产平台多点系泊选型设计

采用悬链线系泊模式为一座深水半潜式生产平台进行多点系泊选型设计。通过敏感性分析,理顺各类因素对于整体系泊设计方案的影响规律,从而实现参数的合理选取,使得系泊方案的各项技术指标均满足规范要求,最终总结得出一套针对深水浮体多点悬链线系泊系统的设计流程。     

复杂产品制造企业管理信息化平台关键技术研究

从复杂产品的生产管理特点出发,提出了与CAD/CAPP/PDM集成的以实现动态生产管理为目标的企业管理信息化平台方案,并对方案实现的技术路线及技术关键进行了阐述.     

基于设计生产管理一体化的船舶物资编码研究

从设计生产管理一体化的角度分析了现代造船企业中船舶物资编码的现状和存在问题,阐述了现行的物资编码体系无法实施的原因,在此基础上提出了符合设计生产管理一体化的物资编码方案,并对该方案下的物资编码自动生成过程进行了详细描述。     

水下生产系统防沉板基础分析

介绍水下生产系统采用的防沉板、吸力桩和桩三种基础形式的优缺点和选择标准。针对防沉板基础的特点,提出需考虑的因素和依据的规范,以及沉降、滑移,裙板抗扭和贯入深度的计算分析方法。     

国有企业生产网计算机保密管理研究

随着国际形势的日趋严峻,保密安全也上升到了一个新的高度,国有企业如何使用技术手段辅助管理手段,更好的完成保密管理成为关键,作者在本文中通过完善台账、限制非法外连和限制非授权U盘接入的方式从技术上降低了保密的安全隐患。     

Optimal Preventive Maintenance Policy with Consideration of Production Wait

In this paper, we consider the replacement of a single unit with catastrophic failure mode. Besides replaced at a preset time, the unit is also replaced at failure time or if it encounters a production wait and its age has reached a threshold. The joint preventive maintenance interval and threshold optimization problem are formulated with the objective of minimizing the expected cost per unit time in long run. A numerical example is presented to illustrate the applicability of the model.     

The use of hydrogen as a fuel for inland waterway units

Escalating apprehension about the harmful effects of widespread use of conventional fossil fuels in the marine field and in internal combustion engines in general, has led to a vast amount of efforts and the directing of large capital investment towards research and development of sustainable alternative energy sources. One of the most promising and abundant of these sources is hydrogen. Firstly, the use of current fossil fuels is. discussed focusing on the emissions and economic sides to emphasize the need for a new, cleaner and renewable fuel with particular reference to hydrogen as a suitable possible alternative. Hydrogen properties, production and storage methods are then reviewed along with its suitability from the economical point of view. Finally, a cost analysis for the use of hydrogen in internal combustion engines is carried out to illustrate the benefits of its use as a replacement for diesel. The outcome of this cost analysis shows that 98% of the capital expenditure is consumed by the equipment, and 68.3% of the total cost of the equipment is spent on the solar photovoltaic cells. The hydrogen plant is classified as a large investment project because of its high initial cost which is about 1 billion US$; but this is justified because hydrogen is produced in a totally green way. When hydrogen is used as a fuel, no harmful emissions are obtained.     

关于"深化劳动和劳动价值论认识"的几个问题之我见

马克思的劳动价值论是正确的，但不是凝固的；新形势下的劳动发展，主要是生产劳动范围的扩大，和劳动结构的复杂化；劳动价值“一元论”仍是正确的，但与现实生活有矛盾，需要在原有的基础上探讨新的理论出路；分析了按要素分配的客观依据，与按资分配的关系及其负面影响。