论水利工程工期对工程造价的影响

一个基本建设工程项目，从前期决策到竣工投产，贯穿始终的，除各方技术条件满足要求外，更为重要的是经济合理性，而经济合理的关键则是工程造价。从工程建设的不同阶段，分别浅述工期对工程造价不同程度的影响。     

发电企业动态成本处理与实时竞价方案

通过剖析两部制电价的涵义，得出了发电企业的基本竞价模型。基于竞价上网的要求，讨论了发电企业动态成本的处理和预测方法，给出了在此基础上发电企业的一种实时竞价方案。     

发电公司报价辅助决策系统研究

为了适应电力市场的需要，建立了发电公司报价辅助决策系统。该系统在完成诸如成本分析等基本功能模块的基础上采用Internet技术，由信息浏览终端、应用程序服务器、历史及实时数据库服务器及防火墙等功能模块组成，其具体实现可以基于Windows系列操作平台及国内外流行的商用数据库平台，采用面向对象的程序设计方法，以VC 6.0等语言为主要开发工具。     

A generation expansion model for electric utilities with stochastic stranded cost

We design and analyze a generation expansion planning model considering the stochastic nature of stranded cost. The stranded cost is the investment balance outstanding when a generation unit is forced to shut down because it is not economically competitive. This is an important issue nowadays due to the on-going transition of the electric power industry from regulated monopolies toward competition with substantial financial uncertainties. In this paper, specifically, we mathematically formulate a generation expansion planning model with stochastic stranded cost based on the mean–variance method. Next, based on experts' estimation of elementary relations among projects over periods, we derive mathematical formulae for covariances among projects and periods. This is shown to enhance the implementability of the generation expansion planning model. Also, managerial insights are provided (e.g. a set of negatively correlated projects will reduce the financial risk associated with stranded cost). Finally, by way of a numerical example, the features of our model are illustrated.     

Frequency security constrained short-term unit commitment

In island grids and weakly interconnected power systems, a loss of a large proportion of generation will cause the system frequency to fall dramatically. In order to ensure a stable operation with the lowest impact on the system, the disturbed power balance must be equalized within a short specified time by activating the seconds reserve of on-line units or by load shedding or both. This paper presents a frequency security constrained short-term scheduling. The procedure commits and optimizes units, calculates necessary seconds reserve capability, and allocates them among the available on-line units to provide emergent frequency regulation following a loss of generation. By means of the low-pressure pre-heater interruption (LPHI) implemented into thermal power plants, seconds reverse provision is increased. Thus, load shedding caused by insufficient availability of seconds reserve can be avoided. A case study on typical island systems with a large number of different units is demonstrated using the proposed procedure. Results from the study validated robust performance of the proposed procedure that minimizes fuel costs while maintaining frequency security condition.     

发电企业战略成本管理研究

随着电力体制改革的深入,发电企业必将成为电力市场竞争的主体,而竞价上网是发电企业竞争的必然选择,在其他条件基本相同的情况下,价格优势就是发电企业的竞争优势,其直接关系到企业的生存和发展.成本是价格的决定性因素,但传统的成本管理方法已经不能适应电力市场竞争的要求,必须引进新的成本管理理念和新的管理方法,本文对此作出了论述.     

工程资金使用计划的编制和控制

在论述工程资金使用计划编制重要性的基础上,讨论了如何编制工程资金使用计划,如 何在工程实施过程中利用工程预算费用曲线、实际投入费用曲线及预算费用和时间关系曲线进行 投资偏差分析,进而实现进度成本双控制等。     

浅谈施工项目成本管理

工程项目施工管理推行"项目经理责任制”和"项目成本核算制”是提高施工企业管理水平的有效管理模式.本文论述了"项目成本核算制”成本管理的理念特征和建立施工企业成本管理体系并进行成本管理及控制的要点.     

时变多状态滞后不确定系统的最优保性能控制器设计

研究了一类具有时变多状态滞后不确定系统的状态反馈保性能控制器设计问题,推导出了保性能控制器存在的充分条件,通过解等价的线性矩阵不等式给出了控制器的设计方法,进而通过建立和求解一个性线矩阵不等式约束的凸优化问题,提出了最优保性能控制律的设计方法。     

变化减少方案──面向产品多样化的新战略

对变化减少方案（ＶＲＰ）进行了系统介绍．该方案从分析制造变化性入手，从新的角度分析制造成本，应用５项技术减少产品结构及制造结构的品种与数量，达到在降低制造成本的同时不减少产品品种甚至增加新品种的目的．ＶＲＰ的应用将改变传统的思维模式，对制造业产生深远的影响