网络计划技术在暖通空调工程管理中的应用

结合实际工程,介绍了该应用的具体步骤。通过对工程的分析,绘制了网络图,找到了关键线路,并对工程计划进行了优化。     

The dimensional nature of same–different discrimination behavior in pigeons.

We studied the dimensional nature of same–different discrimination behavior in pigeons. Birds first learned to discriminate between simultaneously presented displays of 16 identical items (Same arrays) and 16 nonidentical items (Different arrays), conditional on the color of the background. After discrimination mastery, we tested the birds with Mixture arrays comprising both identical and nonidentical items. Accuracy increased and reaction time decreased as the disparity in entropy (a measure of variability) between the arrays increased. As well, within each entropy disparity level, lower entropy values were more discriminable than higher entropy values. These results accord with a logarithmic relation between entropy and discriminative behavior and, thus, with the idea that the discrimination of Same from Different arrays follows Weber's Law. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Fuzzy uncertainty modelling for project planning: application to helicopter maintenance

Maintenance is an activity of growing interest, especially for critical systems. In particular, aircraft maintenance costs are becoming an important issue in the aeronautical industry. Managing an aircraft maintenance centre is a complex activity. One of the difficulties comes from the numerous uncertainties that affect the activity and disturb the plans in the short and medium term. Based on a helicopter maintenance planning and scheduling problem, we study in this paper the integration of uncertainties into tactical and operational multi-resource, multi-project planning (respectively Rough Cut Capacity Planning and the Resource Constraint Project Scheduling Problem). Our main contributions are in modelling the periodic workload on a tactical level considering uncertainties in macro-task work content, and modelling the continuous workload on the operational level considering uncertainties in task duration. We model uncertainties using a fuzzy/possibilistic approach instead of a stochastic approach since very limited data are available. We refer to the problems as the Fuzzy Rough Cut Capacity Problem (FRCCP) and the Fuzzy Resource Constraint Project Scheduling Problem (RCPSP). We apply our models to helicopter maintenance activity within the frame of the Helimaintenance project, an industrial project approved by the French Aerospace Valley cluster that aims at building a centre for civil helicopter maintenance.     

江西省农村计划生育适宜技术供方使用评价分析

目的探讨江西省计划生育适宜技术供方使用及评价情况。方法采用分层整群抽样的方法,对5个示范县228例医务人员使用4项计划生育适宜技术情况进行问卷调查。结果医务人员对4项计划生育适宜技术总体满意度为76.2%。对4项技术的满意率存在明显差异（P〈0.001）。4项计划生育技术的诊疗效果、操作简便、病人易接受、适宜性、安全性、节约时间、省钱等方面的满意率分别为96.5%、93.4%、92.5%、97.8%、98.2%、92.5%、83.3%。多因素逐步Logistic回归分析结果显示：技术使用者的专业技术职称越高越容易推广,对技术掌握的程度越熟练越容易推广,适宜技术价格越贵越不容易推广,诊疗效果满意则易于推广。结论江西省农村卫生适宜技术使用推广效果好。适宜技术的推广宜选用职称高、技术熟练、价格相对较低、疗效较为满意的技术开展推广运用。     

科学规划走城乡统筹发展的城镇之路

针对目前小城镇规划发展现状,探讨了统筹城乡发展、推进城镇化建设的一系列对策,并努力加快中心镇城市化进程,从而实现城乡经济发展和城乡面貌的巨大改善,为推动社会主义新农村建设创造了条件。     

浦钢搬迁工程施工准备规划与实践

结合浦钢搬迁工程,从自然条件、平面及空间布置、资源需求、施工进度控制等方面,对新建大型冶金工程项目施工准备工作总体规划和组织实施工作进行了总结。     

浅谈银川中心城区电力通道规划制订

结合银川中心城区负荷发展和城市建设发展情况,对在中心城区电网建设中存在的变电站选址、选线的困难以及电网建设与城市建设之间的矛盾、城市规划对电网的控制、电网建设对环境的影响等问题进行分析,提出电网与城市规划结合发展的思路,并提出相应的技术原则,制订银川中心城区＂十二五＂电力通道规划。     

DG integrated multistage distribution system expansion planning

In this paper, a framework is presented to solve the problem of multistage distribution system expansion planning in which installation and/or reinforcement of substations, feeders and distributed generation units are taken into consideration as possible solutions for system capacity expansion. The proposed formulation considers investment, operation, and outage costs of the system. The expansion methodology is based on pseudo-dynamic procedure. A combined genetic algorithm (GA) and optimal power flow (OPF) is developed as an optimization tool to solve the problem. The performance of the proposed approach is assessed and illustrated by numerical studies on a typical distribution system.     

电网规划中考虑风电场影响的最小切负荷量研究

提出应用鲁棒线性优化理论来研究电网规划中含多个风电场的最小切负荷量计算问题,为含多个风电场的系统安全性研究提供了一条新的思路。根据Seng-Cheol Kang提出的鲁棒线性优化理论,建立电网规划中考虑风电场影响的最小切负荷量模型。该模型以出力上下限和出力期望值来描述风电场的出力,最终转化为一确定性的线性规划问题并进行求解。在计及或不计及发电机调整的情况下,该模型均能够给出最安全的切负荷方案,除此以外还能给出更多介于最可靠与最经济之间的切负荷方案,实现灵活决策;在计及发电机出力可调的情况下,该模型能够给出相应的发电机出力方案;该模型能够初步给出各种切负荷方案下电网规划方案的可靠程度。基于修正的Garver’s 6节点系统和修正的巴西南部46节点系统算例测试结果验证了该方法的有效性。     

新能源与电网规划建设

探讨了在低碳观念逐渐普及、新能源方兴未艾的新形势下,电网应该抓住前所未有的巨大机遇,调整电网规划思路,提高发电比重、预留新能源电源点及其接入通道,大幅扩大电力市场规模,做大做强电网,使电网成为全社会能源供应的主平台。