百年电力3号机组性能试验及经济性分析

介绍了百年电力发展股份有限公司#3机组大修后性能试验,分析了试验结果,并对机组存在的问题及其对经济性的影响进行了分析,提出了相应的解决办法,为机组的运行和检修提供一定的理论依据。     

Optimization of power input diagram of 50 t UHP-EAF

In order to improve operation for shortening tap to tap time and saving electrical energy, on the base of no-linear reactance model, the electrical characteristics of the 50 t UHP-EAF in Fushun Special Steel Co. Ltd. were analyzed. Considering steelmaking process conditions, the optimum power-input diagrams were investigated, which can save energy, lower consumption, and raise productivity. This has been verified by production contrast tests. Application of the optimum curve in 50 t UHP-EAF indicates that research method is correct, the 50 t UHP-EAF runs smoothly with lowering electrical energy by 29.35 kW.h/t and shortening power on time by 3 rain. The general steps of making optimum power-input specification is also given.     

多级工程模糊优选在土石坝溢洪道选型中的应用

针对溢洪道设计中经常遇到的方案优选问题，提出将多因素、多层次模糊优选理论引入溢洪道的设计选型工作中。对影响因素复杂、确定隶属函数主观因素较强的情况，引入因素的优先关系法来确定优选矩阵的隶属度，这样减少了确定隶属函数的人为影响，通过此优选模型利用影响溢洪道选型的主要因素对多种溢洪道设计型式进行了多级模糊综合优选决策，得到了比较理想的决策结果，为溢洪道设计选型提供了新的思路。     

红寺堡扬水灌区新庄集梯级泵站优化调度研究

以红寺堡扬水灌区新庄集梯级泵站为研究对象，从提高梯级泵站的综合效益出发，根据新庄集梯级泵站各机组的实际情况和要求，以泵站级数K为阶段变量，各级泵站的供水流量Ｑｋ为状态变量，各级泵站的开机方案Dｋ^T为决策变量，运用动态规划理论，建立在流量匹配的前提下能耗最低且弃水量最少的优化数学模型。在泵的工况点确定时，分别采用了克莱姆法则和试算法对单泵工况点和多泵工况点进行了确定。通过编制新庄集梯级泵站的优化调度应用程序，得到了各泵站的最优组合方案，即一泵站的2^#，3^#，4^#，5^#，6^#泵组合；二泵站的1^#，3^#，4^#，5^#泵组合；三泵站的1^#，3^#，4^#，6^#泵组合；四泵站的1^#，3^#，4^#，6^#泵组合。由模拟计算结果，并结合工程实际，提出在现有条件下采用工程改造的建议，即在现有的基础上附加小泵，对现有的泵进行变速、变时、变阀调节，附加回水管和调节干渠的分出流量，采用该方法较好地提高了泵站的经济效益，使泵站的管理有效、方便。     

气体分馏过程工艺条件的优化

针对某石化厂气体分馏装置工艺流程进行了模拟计算 ,提出了降低丙烯排放量及各塔热负荷的操作条件调优方案 ,并进行了优化计算和实施。优化前后的结果比较表明 :在确保主产品丙烯的产量和纯度的条件下 ,各塔热负荷的总和降低了 9 2 % ,提高了经济效益     

对工程项目管理系统的认识

工程项目管理系统是企业信息系统中关键的子系统。用于指导和协调其它子系统之间业务传递和数据共享。针对工程项目管理存在的信息沟通困难、数据易变化、书面文档多的难点，在建立工程项目管理系统时。可通过计算机网络系统、信息沟通系统、电子文档管理系统、项目数据管理系统等来实现对工程项目的管理。     

Stress Versus Coarticulation: Toward an Integrated Approach to Explicit Speech Segmentation.

Although word stress has been hailed as a powerful speech-segmentation cue, the results of 5 cross-modal fragment priming experiments revealed limitations to stress-based segmentation. Specifically, the stress pattern of auditory primes failed to have any effect on the lexical decision latencies to related visual targets. A determining factor was whether the onset of the prime was coarticulated with the preceding speech fragment. Uncoarticulated (i.e., concatenated) primes facilitated priming. Coarticulated ones did not. However, when the primes were presented in a background of noise, the pattern of results reversed, and a strong stress effect emerged: Stress-initial primes caused more pruning than non-initial-stress primes, regardless of the coarticulatory cues. The results underscore the role of coarticulation in the segmentation of clear speech and that of stress in impoverished listening conditions. More generally, they call for an integrated and signal-contingent approach to speech segmentation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Axial offset control of PWR nuclear reactor core using intelligent techniques

Improved load following capability is one of the main technical performances of advanced PWR (APWR). Controlling the nuclear reactor core during load following operation encounters some difficulties. These difficulties mainly arise from nuclear reactor core limitations in local power peaking, while the core is subject to large and sharp variation of local power density during transients. Axial offset (AO) is the parameter usually used to represent of core power peaking, in form of a practical parameter. This paper, proposes a new intelligent approach to AO control of PWR nuclear reactors core during load following operation. This method uses a neural network model of the core to predict the dynamic behavior of the core and a fuzzy critic based on the operator knowledge and experience for the purpose of decision-making during load following operations. Simulation results show that this method can use optimum control rod groups maneuver with variable overlapping and may improve the reactor load following capability.     

有机产品生产运行控制课程理实一体化教学改革与实践

通过对有机化工产品生产岗位工作任务调研,提出了课程改革的理念和思路,介绍了课程的实施,并对教学方法和手段、成绩考核方案设计等进行了改革,同时提出了理实一体化课程实施过程中要解决的教材、教学条件和师资队伍建设等问题。     

DSE555控制器在柴油发电机组中的应用

介绍了英国制造的DSE555控制器操作方式，内部参数的设置，数据采集功能，机组故障保护功能。阐述了DSE555控制器工作方式，典型接线及控制器在电信备用柴油发电机组中的应用。